Speaker, and manufacturing method of speaker

Abstract

To provide a speaker capable of easily connecting an interconnect line and a connection terminal.SOLUTION: A speaker 100 includes an interconnect line 160 connecting between a voice coil 121 and a connection terminal 150. The connection terminal 150 includes: a base part 159; a first protrusion 151 protruding integrally from the base part 159; and a second protrusion 152. At least one of the boundary between the base part 159 and the first protrusion 151 and the boundary between the base part 159 and the second protrusion 152, there is a deformation part 154 that deforms in the direction where the first protrusion 151 and the second protrusion 152 approach each other.SELECTED DRAWING: Figure 3

Description

Technical Field

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

Background Art

[0002] In a speaker, the voice coil and the external connection terminal may be connected using a brocade wire having high durability and high flexibility. Conventionally, the terminal and the brocade wire are often connected by soldering. Patent Document 1 describes a technique for connecting the terminal and the brocade wire by caulking a portion of the terminal arranged to wrap around the periphery of the end of the brocade wire. Patent Document 2 describes a technique for connecting the brocade wire and the terminal by the spring force of the terminal by pushing the brocade wire into a slit provided in the terminal.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, operations such as soldering when connecting the brocade wire and the terminal and caulking so as to wrap the end of the brocade wire are difficult to automate and are therefore performed manually, which hinders the efficiency of the speaker assembly operation. In addition, although there is soldering as a method of connecting the brocade wire and the terminal, the soldering process is difficult to automate. Under such circumstances, there is a desire to automate the connection between the brocade wire and the terminal with low investment and at low cost.

[0005] The present disclosure provides a speaker capable of simplifying the connection structure between a brocade wire and an external connection terminal, and a method for manufacturing the speaker.

Means for Solving the Problem

[0006] One of the speakers according to the present disclosure includes a magnetic circuit having a magnetic gap, a voice coil disposed in an inserted state in the magnetic gap, a diaphragm to which the voice coil is attached, a frame that holds the magnetic circuit and the diaphragm, a connection terminal attached to the frame, and a connection wire that connects the voice coil and the connection terminal. The connection terminal includes a base portion, a first protrusion integrally protruding from the base portion, and a second protrusion integrally protruding from the base portion with a gap from the first protrusion. At least one of a boundary portion between the base portion and the first protrusion and a boundary portion between the base portion and the second protrusion includes a deformation portion that plastically deforms in a direction in which the first protrusion and the second protrusion approach each other.

[0007] Also, one of the methods for manufacturing a speaker according to the present disclosure includes a magnetic circuit having a magnetic gap, a voice coil disposed in an inserted state in the magnetic gap, a diaphragm to which the voice coil is attached, a frame that holds the magnetic circuit and the diaphragm, a connection terminal attached to the frame, and a connection wire that connects the voice coil and the connection terminal. The connection terminal includes a base portion, a first protrusion integrally protruding from the base portion, and a second protrusion integrally protruding from the base portion with a gap from the first protrusion. At least one of the first protrusion and the second protrusion has a recess in a direction of the first distance from the base portion in a protruding direction of the first protrusion and the second protrusion, and a concave portion that sandwiches the connection wire in a direction in which the first protrusion and the second protrusion are arranged. A method for manufacturing a speaker, comprising inserting the connection wire arranged to intersect in the arrangement direction into a gap between the first protrusion and the second protrusion, temporarily holding the connection wire in the concave portion, caulking the connection terminal so that a tip end portion of the first protrusion and a tip end portion of the second protrusion approach each other, and crimping the connection wire in the concave portion.

Advantages of the Invention

[0008] According to the present disclosure, the terminal and the connection wire can be easily connected.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0010] Hereinafter, embodiments of a speaker and a method for manufacturing the speaker according to the present invention will be described with reference to the drawings. Note that the following embodiments are examples for explaining the present invention and are not intended to limit the present invention. For example, the shapes, structures, materials, components, relative positional relationships, connection states, numerical values, mathematical formulas, contents of each step in the method, the order of each step, etc. shown in the following embodiments are examples, and may include contents not described below. Also, although geometric expressions such as parallel and orthogonal may be used, these expressions do not indicate mathematical strictness and include substantially allowable errors, deviations, etc. Also, expressions such as simultaneous and identical also include a substantially allowable range.

[0011] In addition, the drawings are schematic diagrams that are appropriately emphasized, omitted, or adjusted in ratio for the purpose of explaining the present invention, and are different from the actual shapes, positional relationships, and ratios. Also, the X-axis, Y-axis, and Z-axis that may be shown in the drawings represent orthogonal coordinates arbitrarily set for the purpose of explaining the drawings. That is, the Z-axis does not necessarily follow the vertical direction, and the X-axis and Y-axis do not necessarily exist within the horizontal plane.

[0012] In addition, in the following, a plurality of inventions may be comprehensively described as one embodiment. Also, a part of the content described below is explained as an arbitrary component related to the present invention.

[0013] FIG. 1 is a cross-sectional perspective view showing a speaker according to an embodiment with the diaphragm omitted. FIG. 2 is a cross-sectional view of the speaker according to the embodiment. Note that FIG. 2 shows a cross-section taken along line I-I shown in FIG. 1. Also, although not shown in the cross-section of FIG. 2, connection lines and terminals are added.

[0014] The speaker 100 is not particularly limited as long as it can convert an electrical signal into sound. In the case of the present embodiment, the speaker 100 is a speaker attached to a moving body such as an automobile, and is a small speaker that can be embedded in a limited space within the moving body. In this specification, "small" may be used to mean a speaker having an inner diameter of the frame 140 of 10 cm or less. The speaker 100 includes a magnetic circuit 110, a voice coil 121, a diaphragm 130, a frame 140, connection terminals 150, and connection lines 160.

[0015] The magnetic circuit 110 generates a steady magnetic flux. The steady magnetic flux generated by the magnetic circuit 110 acts on the magnetic flux that changes based on the electrical signal input to the voice coil body 120. The magnetic circuit 110 is attached to the frame 140 so as to be located behind the diaphragm 130, and includes an annular magnetic gap 111 facing the diaphragm 130. The magnetic gap 111 is a gap that generates a steady magnetic flux in a direction intersecting the magnetic flux generated in the voice coil body 120.

[0016] In the case of this embodiment, the magnetic circuit 110 is of an external magnet type, and includes a magnetized cylindrical magnet 112, an annular top plate 113 disposed on the surface of the magnet 112 on the diaphragm 130 side, a disk-shaped base plate 114 disposed on the side opposite to the top plate 113 with respect to the magnet 112, and a center pole 115 inserted from the central portion of the base plate 114 into the through hole of the top plate 113 and forming a magnetic gap 111 between the top plate 113. Further, the base plate 114 and the center pole 115 are integrally formed.

[0017] The top plate 113, the base plate 114, and the center pole 115 are made of a magnetic material. It is preferable to use, for example, a neodymium-based magnet having high magnetic energy for the magnet 112. Thereby, the thickness of the magnet 112 can be reduced, and the thickness of the entire speaker 100 can be reduced. Furthermore, weight reduction can also be achieved.

[0018] The magnet 112 is a plate-shaped annular permanent magnet having a through hole formed in the center through which the center pole 115 is inserted. One end of the magnet 112 in the thickness direction (the winding axis direction of the voice coil 121) is an N pole, and the other end is an S pole. The top plate 113 is fixed to one pole side surface of the magnet 112, and the base plate 114 is fixed to the other pole side surface. The fixing method of the top plate 113, the magnet 112, and the base plate 114 is not particularly limited, but in the case of this embodiment, they are fixed by an adhesive. Note that they may be fixed using fastening members such as screws and rivets.

[0019] Note that the type of the magnetic circuit 110 included in the speaker 100 is not particularly limited, and an internal magnet type magnetic circuit 110 or the like may be adopted.

[0020] The voice coil 121 is a component that is disposed within the magnetic gap 111 of the magnetic circuit 110 and attached to the diaphragm 130. The voice coil 121 generates a magnetic flux based on the input electrical signal and vibrates in the winding axis direction due to the interaction with the magnetic flux by the magnetic circuit 110.

[0021] The winding axis (central axis) of the voice coil 121 is arranged in the direction of vibration (amplitude) of the diaphragm 130 and is orthogonal to the direction of the magnetic flux within the magnetic gap 111.

[0022] The voice coil 121 is configured by winding a single metallic wire multiple times in a circular (cylindrical) shape. In the case of this embodiment, a voice coil body 120 is formed by the voice coil 121 and a bobbin 122 around which the voice coil 121 is wound. The bobbin 122 is a cylindrical member made of a material such as aluminum or resin. The voice coil 121 is connected to the diaphragm 130 via the bobbin 122. From the voice coil body 120, the respective ends of a pair of connection lines 160 that are electrically connected to the voice coil 121 are mechanically attached. In the case of this embodiment, a brocade thread is adopted for the connection line 160.

[0023] The brocade thread is a type of lead wire and has a structure that is more flexible and resistant to repeated bending compared to vinyl electric wires, Litz wires, etc. Since the brocade thread is less likely to apply stress to the vibration of the voice coil body 120, it is possible to suppress the influence of the connection line 160 on the acoustic characteristics. Specifically, the brocade thread can exemplify a structure in which a large number of wire materials around which copper foil is wound around a thread are twisted together.

[0024] Note that the speaker 100 may not include the bobbin 122, and the voice coil 121 may be directly attached to the diaphragm 130.

[0025] Also, in the case of this embodiment, a damper 170 is attached to the voice coil body 120. The damper 170 is a member having flexibility and resilience, with its inner peripheral portion attached to the voice coil body 120 and its outer peripheral portion attached to the frame 140. The damper 170 has a concentrically undulating shape. The damper 170 assists the voice coil body 120 to move linearly in the winding axis direction of the voice coil 121. Note that it may be damperless in order to lower the minimum resonance frequency of the speaker 100 and improve the sound quality. Also, the damper 170 may be attached to the diaphragm 130 instead of the voice coil body 120.

[0026] The diaphragm 130 is a member to which the voice coil 121 is connected, and is a member that vibrates air to generate sound by displacing in the winding axis direction with respect to the neutral position based on the vibration of the voice coil 121. In the case of this embodiment, the shape of the diaphragm 130 is a so-called cone type. The outer peripheral portion of the diaphragm 130 is attached to the end face of the wall portion of the frame 140 via an edge 131 having more flexibility and resilience than the shape of the diaphragm 130. A hole through which the bobbin 122 is inserted is provided in the central portion of the diaphragm 130. A dome-shaped cap 132 that covers the hole in the central portion is attached to the diaphragm 130.

[0027] Note that the shape of the diaphragm 130 is not particularly limited, and examples thereof include a conical shape, an elliptical conical shape, and a pyramidal shape, and a flat shape such as a disc, an elliptical plate, or a flat plate may also be used. The material constituting the diaphragm 130 is not particularly limited, and examples thereof include paper and resin.

[0028] The frame 140 is a member that holds the magnetic circuit 110, the voice coil body 120, and the damper 170. In the case of this embodiment, the frame 140 includes a bottomed cylindrical inner member 141 that holds the magnetic circuit 110 and the damper 170, an annular (cylindrical) outer member 142 disposed on the outer periphery of the diaphragm 130, and a plurality of rod-shaped connecting members 143 that cross-connect the inner member 141 and the outer member 142. The inner member 141, the outer member 142, and the connecting members 143 are integrally formed of resin.

[0029] The outer member 142 has a connector portion 144 integrally attached to project radially outward from the outer peripheral surface. Also, a terminal block 145 projecting inward is attached to the opposite side of the connector portion 144 of the outer member 142.

[0030] One end portion of the outer member 142 (the end portion on the Z+ side in the figure) has the outer peripheral portion of the diaphragm 130 attached thereto via the edge 131 with an adhesive or the like. The magnetic circuit 110 is attached to the inner member 141 in a housed state. The outer member 142 and the inner member 141 are fixedly connected by the connecting members 143. Thus, the diaphragm 130 is disposed at a predetermined position with respect to the magnetic circuit 110.

[0031] The material constituting the frame 140 is not particularly limited, but in the case of this embodiment, the frame 140 is a resin molded product. The bottomed cylindrical inner member 141, the connector portion 144, and the terminal block 145 are integrally molded of resin. A holding portion 146 is integrally provided on the voice coil body 120 side of the terminal block 145. A restraining portion 147 that gently restrains the movement of the connection wire 160 without fixedly holding the connection wire 160 is integrally provided between the voice coil body 120 and the terminal block 145 of the inner member 141. Note that when the frame 140 is molded, a pair of connection terminals 150 are attached in a state of penetrating from the terminal block 145 to the connector portion 144 of the outer member 142 by insert molding.

[0032] The connector portion 144 is a part for connecting the speaker 100 to an amplifier or the like. In the case of the present embodiment, the connector portion 144 can be electrically connected to a connection terminal 150 that protrudes inward of the connector portion 144 when a male connector provided at the tip of the output cable of the amplifier is inserted. As a result, the audio signal output from the amplifier can be input to the voice coil 121 via the connection line 160.

[0033] FIG. 3 is a perspective view showing the vicinity of the terminal block. As shown in FIG. 3, the terminal block 145 holds a connection terminal 150 that protrudes to a predetermined position inside the outer member 142 of the frame 140. The terminal block 145 has a cantilever shape that protrudes from the inner peripheral surface of the outer member 142 toward the voice coil body 120.

[0034] On the diaphragm 130 side (Z+ side in the figure) of the pair of connection terminals 150 protruding from the terminal block 145, a pair of holding portions 146 for holding the tip portions of the pair of connection lines 160 extending from the voice coil body 120 are arranged. The holding portion 146 is provided with a slit, and is arranged so that the slit of the holding portion 146 and the gap of the connection terminal 150 are included in the same plane.

[0035] FIG. 4 is a plan view showing the connection terminal 150 before plastic deformation. FIG. 5 is a plan view showing the connection terminal 150 after plastic deformation. The connection terminal 150 is a member that is electrically connected to the connection line 160 by structurally holding the connection line 160. The connection terminal 150 includes a base portion 159, a first protrusion 151 that protrudes integrally from the base portion 159, and a second protrusion 152 that protrudes integrally from the base portion 159 with a gap from the first protrusion 151.

[0036] The base portion 159 is a structural foundation portion that protrudes from the terminal block 145, and is the portion from the terminal block 145 to the first protrusion 151 and the second protrusion 152.

[0037] At least one of the first protrusion 151 and the second protrusion 152 (both in this embodiment) has a recess 153 that is recessed at a position of a first distance L1 from the base 159 in the protruding direction (Z-axis direction in the figure) of the first protrusion 151 and the second protrusion 152 and sandwiches the connection line 160 in the arrangement direction of the first protrusion 151 and the second protrusion 152 (Y-axis direction in the figure). The shape of the recess 153 in plan view is not limited. In this embodiment, the recess 153 is arc-shaped along the outer peripheral surface of the connection line 160. The pair of recesses 153 that are recessed so as to be separated from each other in the facing state are set to a distance that can hold the connection line 160 loosely with almost no deformation of the connection line 160 before the connection terminal 150 is caulked. On the other hand, after the connection terminal 150 is caulked, the distance between the pair of recesses 153 is set to a distance that compresses the connection line 160 so as to clamp it and the connection line 160 does not shift relative to the connection terminal 150 even when the speaker 100 is driven. Note that the shape of the recess 153 in plan view may be a part of a polygon such that the outer peripheral surface of the connection line 160 is inscribed.

[0038] At least one of the boundary portions between the base 159 of the connection terminal 150 and the first protrusion 151 and the boundary portions between the base 159 and the second protrusion 152 (both in this embodiment) has a deformed portion 154 that is plastically deformed in the direction in which the first protrusion 151 and the second protrusion 152 approach each other. The deformed portion 154 is a portion generated by so-called caulking of the connection terminal 150. In FIG. 5, the deformed portion 154 is shown by an elliptical broken line, but this does not clearly show the position of the plastically deformed deformed portion 154.

[0039] As shown in FIG. 4, the connection terminal 150 is manufactured with a first protrusion 151 and a second protrusion 152 at a predetermined interval. By caulking in the direction in which the interval between the first protrusion 151 and the second protrusion 152 narrows (the Y-axis direction in the figure) as shown in FIG. 5, a deformed portion 154 is generated. In the case of this embodiment, on the first protrusion 151 and the second protrusion 152, in the protruding direction (the X-direction in the figure), at positions of a second distance L2 (see FIG. 4) farther from the base portion 159 than the first distance L1, a first contact portion 155 and a second contact portion 156 that come into contact with each other and regulate the force by which the connection wire 160 is sandwiched by the recess 153 are provided, respectively. When caulking the connection terminal 150, portions other than the first contact portion 155 and the second contact portion 156 do not come into contact at the first protrusion 151 and the second protrusion 152. As described above, when caulking the connection terminal 150, by finishing the caulking operation by the contact between the first contact portion 155 and the second contact portion 156, even if caulking is performed on a plurality of connection terminals 150, it is possible to maintain the compression amount (length) of the connection wire 160 constant. Incidentally, at the stage of designing the shape of the connection terminal 150, when the distance between the first contact portion 155 and the second contact portion 156 before caulking is D, the compression amount (length) T of the connection wire 160 can be simply derived using the formula T = D * (L1 / L2) (* means multiplication and / means division). Further, although the compression amount of the connection wire 160 is not limited, for example, a case can be exemplified in which the connection wire 160 is held by the connection terminal 150 in a compressed state within a range of 10% or more and less than 40% of the wire diameter between a pair of recesses 153 due to the contact between the first contact portion 155 and the second contact portion 156.

[0040] At least one (both in this embodiment) of the opposing portions of the first protruding portion 151 and the second protruding portion 152 is provided with a tapered portion 157 in which the gap widens from the position where the concave portion 153 is disposed toward the tip (the X-side end portion in the figure). The distance between the end portions on the base portion 159 side of the tapered portion 157 is set shorter than the diameter of the connection line 160. By providing the tapered portion 157, when inserting the connection line 160 from the tips of the first protruding portion 151 and the second protruding portion 152 toward the concave portion 153 between the first protruding portion 151 and the second protruding portion 152, the elastic force of the connection terminal 150 gradually expands the space between the first protruding portion 151 and the second protruding portion 152, and when the connection line 160 reaches the concave portion 153 beyond the end portions on the base portion 159 side of the tapered portion 157, the connection line 160 is temporarily fixed in the concave portion 153.

[0041] The material of the connection terminal 150 is not limited as long as it has conductivity and is plastically deformable. In this embodiment, the connection terminal 150 is made of metal. Also, the connection terminal 150 is manufactured by punching out a sheet metal that spreads over a surface including the protruding directions and the arrangement direction of the first protruding portion 151 and the second protruding portion 152 by press working.

[0042] Next, a method for mechanically and electrically connecting the connection line 160 to the connection terminal 150 to manufacture the speaker 100 will be described with reference to FIGS. 6, 7, and 3.

[0043] First, as shown in FIG. 6, the tip portions of a pair of connection lines 160 that extend from the voice coil 121 through the restraining portion 147 toward the outer member 142 are respectively sandwiched and held in the slits of the pair of holding portions 146. Next, the outer circumference of the connection line 160 is disposed between the tip of the first protruding portion 151 and the tip of the second protruding portion 152. In this embodiment, since the slit of the holding portion 146 and the gap of the connection terminal 150 are arranged to be included in the same plane, the connection line 160 can be wired as shown in FIG. 6 at the stage of holding the connection line 160 by the holding portion 146.

[0044] Next, using a jig 200, an arm of a robot, etc., each (or simultaneously) of the pair of connection lines 160 spanned between the connection terminal 150 and the restraint portion 147 is pushed downward (in the direction of arrow A in FIG. 7, the side opposite to the holding portion 146 with respect to the connection terminal 150). As a result, the outer peripheral surface of the connection line 160 moves between the first protrusion 151 and the second protrusion 152 of the connection terminal 150 toward the base portion 159, passes through the narrowest part between the pair of tapered portions 157, and fits into the recess 153. Thus, the connection line 160 is temporarily fixed to the connection terminal 150.

[0045] Next, in the direction indicated by arrow B shown in FIG. 7, the first protrusion 151 and the second protrusion 152 of the connection terminal 150 are caulked until the first contact portion 155 and the second contact portion 156 come into contact. Thus, as shown in FIG. 3, the connection line 160 is mechanically held by the connection terminal in a compressed state between the pair of recesses 153, and an electrical connection between the connection line 160 and the connection terminal 150 is ensured. In addition, deformed portions 154 that are plastically deformed are formed at the boundary portions between the base portion 159 and the first protrusion 151 and between the base portion 159 and the second protrusion 152.

[0046] The method of mechanically and electrically connecting the connection line 160 to the connection terminal 150 can be automatically and easily realized using a robot or the like.

[0047] Note that the present invention is not limited to the above-described embodiments. For example, another embodiment realized by arbitrarily combining the components described in this specification and excluding some of the components may be an embodiment of the present invention. Also, modification examples obtained by making various modifications conceivable by those skilled in the art without departing from the gist of the present invention, that is, the meaning indicated by the language described in the claims, with respect to the above-described embodiments are also included in the present invention.

[0048] For example, although the case where the connection of the pair of connection lines 160 and the pair of connection terminals 150 is performed simultaneously using the jig 200 has been described, the connection lines 160 may be connected to the connection terminals 150 one by one.

[0049] Also, although the case where the connection line 160 and the connection terminal 150 are connected after holding the end portion of the connection line 160 by the holding portion 146 has been described, the connection line 160 and the connection terminal 150 may be connected while the end portion of the connection line 160 is held by a second jig. That is, the speaker 100 does not have to include the holding portion 146.

[0050] Moreover, not only connecting the connection terminal 150 attached to the frame 140 and the connection line 160, but also the connection terminal 150 may be attached to the frame 140 after connecting the connection line 160 and the connection terminal 150.

[0051] Also, although the speaker 100 including the damper 170 has been exemplified, the speaker 100 not including the damper 170 may be used.

[0052] Also, in the embodiment, the case where the connection terminal 150 includes the concave portion 153 has been described, but the connection terminal 150 does not have to include the concave portion 153.

[0053] Also, in the embodiment, the case where the connection terminal 150 includes the tapered portion 157 has been described, but at least one of the mutually facing surfaces of the first protrusion 151 and the second protrusion 152 of the connection terminal may be curved. Curvature includes an R shape and may be not only a flat plate but also a three-dimensional shape. Thereby, the strength of the connection state can be improved, and the productivity in the automatic connection process of the connection line 160 and the connection terminal 150 can be improved.

[0054] [Summary] The speaker 100 according to the first aspect of the present disclosure includes a magnetic circuit 110 having a magnetic gap 111, a voice coil 121 disposed in an inserted state in the magnetic gap 111, a diaphragm 130 to which the voice coil 121 is attached, a frame 140 that holds the magnetic circuit 110 and the diaphragm 130, a connection terminal 150 attached to the frame 140, and a connection wire 160 that connects the voice coil 121 and the connection terminal 150. The connection terminal 150 includes a base portion 159, a first protrusion 151 that integrally protrudes from the base portion 159, and a second protrusion 152 that integrally protrudes from the base portion 159 with a gap from the first protrusion. At least one of the boundary portion between the base portion 159 and the first protrusion 151 and the boundary portion between the base portion 159 and the second protrusion 152 includes a deformation portion 154 that plastically deforms in a direction in which the first protrusion 151 and the second protrusion 152 approach each other.

[0055] According to the first aspect, it becomes possible to easily connect the connection wire 160, such as a brocade thread extending from the voice coil body 120, and the connection terminal 150.

[0056] The speaker 100 according to the second aspect includes the first aspect. At least one of the first protrusion 151 and the second protrusion 152 of the connection terminal 150 is recessed at a position of a first distance from the base portion 159 in the protruding direction and in the arrangement direction of the first protrusion 151 and the second protrusion 152, and includes a recess 153 that sandwiches the connection wire 160.

[0057] According to the second aspect, the connection wire 160 can be temporarily held in the recess 153, and the connection wire 160 can be easily connected to the connection terminal 150. The temporary holding includes a case where the connection wire 160 is held in a state where it is compressed to some extent, and a case where the connection wire 160 is held by friction or the like without being compressed.

[0058] The speaker 100 according to the third aspect includes the second aspect. The first protrusion 151 and the second protrusion 152 are in contact with each other at a second distance farther from the base portion 159 than the first distance L1 in the protruding direction, and include a first contact portion 155 and a second contact portion 156 that regulate the force by which the connection wire 160 is sandwiched by the recess 153.

[0059] According to the third aspect, by caulking the connection terminal 150, the force applied to the connection wire 160 can be maintained within a predetermined range. Thereby, the speaker 100 having predetermined performance can be stably produced.

[0060] The speaker 100 of the fourth aspect includes the third aspect, and the connection wire 160 is held by the connection terminal 150 in a compressed state in the recess 153 by the contact of the first contact portion 155 and the second contact portion 156.

[0061] According to the fourth aspect, it is possible to ensure a desired connection strength and a desired electrical conductivity between the connection wire 160 and the connection terminal 150.

[0062] The speaker 100 of the fifth aspect includes any one of the first aspect to the third aspect, and at least one of the first protrusion 151 and the second protrusion 152 includes a tapered portion 157 in which a gap widens from the position where the recess 153 is disposed toward the tip.

[0063] According to the fifth aspect, when temporarily fixing the connection wire 160 to the connection terminal 150, the connection wire 160 can be moved while expanding the gap between the first protrusion 151 and the second protrusion 152 and disposed between the pair of recesses 153.

[0064] The speaker 100 of the sixth aspect includes the first aspect or the second aspect, and at least one of the mutually facing surfaces of the first protrusion 151 and the second protrusion 152 is curved.

[0065] According to the sixth aspect, the strength of the connection state can be improved, and the productivity in the automatic connection process between the connection wire 160 and the connection terminal 150 can be improved.

[0066] The speaker 100 of the seventh aspect includes any one of the first aspect to the sixth aspect, and the connection terminal 150 is plate-shaped and spreads on a surface including the protruding direction and the arranging direction.

[0067] According to the seventh aspect, the connection terminal 150 can be manufactured easily and inexpensively.

[0068] The speaker 100 of the eighth aspect includes any one of the first to seventh aspects, and the frame 140 includes a holding portion 146 that holds one end portion of the connection wire 160 held by the connection terminal 150.

[0069] According to the eighth aspect, by previously holding the end portion of the connection wire 160 by the holding portion 146, it becomes possible to easily temporarily fix the connection wire 160 to the connection terminal 150. In particular, it is useful when automatically connecting the connection wire 160 and the connection terminal 150 by a robot or the like.

[0070] The speaker 100 of the ninth aspect includes any one of the first to eighth aspects, and the frame 140 includes a restraining portion 147 that gently restrains the other end portion of the connection wire 160 on the voice coil 121 side.

[0071] According to the ninth aspect, when the speaker 100 is driven, the vibration of the connection wire 160 can be kept within a predetermined range, and the influence on the characteristics of the speaker 100 can be suppressed.

[0072] The speaker 100 of the tenth aspect includes any one of the first to ninth aspects, and the connection wire 160 is a brocade thread or a gold thread.

[0073] The manufacturing method of the speaker according to the eleventh aspect includes a magnetic circuit 110 having a magnetic gap, a voice coil 121 disposed in an inserted state in the magnetic gap 111, a diaphragm 130 to which the voice coil 121 is attached, a frame 140 that holds the magnetic circuit 110 and the diaphragm 130, a connection terminal 150 attached to the frame 140, and a connection wire 160 that connects the voice coil 121 and the connection terminal 150. The connection terminal 150 includes a base portion 159, a first protrusion 151 that integrally protrudes from the base portion 159, and a second protrusion 152 that integrally protrudes from the base portion 159 with a gap from the first protrusion 151. At least one of the first protrusion 151 and the second protrusion 152 has a depression in the direction of the first distance L1 from the base portion 159 in the protruding direction of the first protrusion 151 and the second protrusion 152, and has a recess 153 that sandwiches the connection wire 160 in the arrangement direction of the first protrusion 151 and the second protrusion 152. The manufacturing method of the speaker 100 includes inserting the connection wire 160 arranged to intersect in the arrangement direction into the gap between the first protrusion 151 and the second protrusion 152, temporarily holding the connection wire 160 in the recess 153, caulking the connection terminal 150 so that the tip of the first protrusion 151 and the tip of the second protrusion 152 approach each other, and crimping the connection wire 160 in the recess 153.

[0074] According to the eleventh aspect, it becomes possible to easily connect the connection wire 160 such as a brocade thread extending from the voice coil body 120 and the connection terminal 150.

Industrial Applicability

[0075] The present disclosure is useful for a speaker including a voice coil, a connection terminal, and a connection terminal that introduces an acoustic signal from the outside to the inside of the frame, and a manufacturing method thereof.

Explanation of Reference Numerals

[0076] 100 Speaker 110 Magnetic circuit 111 Magnetic gap 112 Magnet 113 Top plate 114 Base plate 115 Center pole 120 Voice Coil Body 121 Voice Coil 122 Bobbin 130 Diaphragm 131 Edge 132 Cap 140 Frame 141 Inner Member 142 Outer Member 143 Connecting Member 144 Connector Part 145 Terminal Block 146 Holding Part 147 Restraining Part 150 Connection Terminal 151 First Protrusion 152 Second Protrusion 153 Recess 154 Deformation Part 155 First Contact Part 156 Second Contact Part 157 Tapered Part 159 Base 160 Connecting Wire 170 Damper 200 Fixture

Claims

1. A magnetic circuit having a magnetic gap, A voice coil disposed in an inserted state in the magnetic gap, A diaphragm to which the voice coil is attached, A frame that holds the magnetic circuit and the diaphragm, A connection terminal attached to the frame, A connection wire that connects the voice coil and the connection terminal, and comprising: The connection terminal is A base portion, A first protrusion integrally protruding from the base portion, A second protrusion integrally protruding from the base portion with a gap from the first protrusion, and comprising: At least one of a boundary portion between the base portion and the first protrusion and a boundary portion between the base portion and the second protrusion includes a deformation portion that plastically deforms in a direction in which the first protrusion and the second protrusion approach each other Speaker.

2. At least one of the first protrusion and the second protrusion is In the protruding direction of the first protrusion and the second protrusion, at a position at a first distance from the base portion, it is recessed in the direction in which the first protrusion and the second protrusion are arranged, and comprises a concave portion that sandwiches the connection wire The speaker according to claim 1.

3. The first protrusion and the second protrusion are In the protruding direction, they abut against each other at a second distance farther from the base portion than the first distance, and comprise a first abutting portion and a second abutting portion that regulate the force by which the connection wire is sandwiched by the concave portion The speaker according to claim 2.

4. The connection wire is Held by the connection terminal in a compressed state in the concave portion by the abutment of the first abutting portion and the second abutting portion The speaker according to claim 3.

5. At least one of the first protrusion and the second protrusion is Comprises a tapered portion in which the gap widens from the position where the concave portion is disposed toward the tip The speaker according to claim 2.

6. At least one of the mutually facing surfaces of the first protrusion and the second protrusion is curved The speaker according to claim 1 or 2.

7. The connection terminal is Plate-shaped and spreads on a plane including the protruding direction of the first protrusion and the second protrusion and the arranging direction of the first protrusion and the second protrusion The speaker according to claim 1 or 2.

8. The frame is Comprises a holding portion that holds one end portion of the connection wire held by the connection terminal The speaker according to claim 1 or 2.

9. The frame is Comprises a restraining portion that gently restrains the other end portion of the connection wire on the voice coil side The speaker according to claim 1 or 2.

10. The connection wire is a silk thread or a gold thread The speaker according to claim 1 or 2.

11. A magnetic circuit having a magnetic gap, a voice coil disposed in an inserted state in the magnetic gap, a diaphragm to which the voice coil is attached, a frame that holds the magnetic circuit and the diaphragm, a connection terminal attached to the frame, and a connection wire that connects the voice coil and the connection terminal, wherein the connection terminal includes a base portion, a first protrusion integrally protruding from the base portion, and a second protrusion integrally protruding from the base portion with a gap from the first protrusion, and a method for manufacturing a speaker, comprising: inserting the connection wire disposed so as to intersect the arrangement direction of the first protrusion and the second protrusion into the gap between the first protrusion and the second protrusion; crimping the connection terminal so that the tip ends of the first protrusion and the second protrusion approach each other to crimp the connection wire; A method for manufacturing a speaker.

Images