SPEAKER

Abstract

This loudspeaker (100) comprises: a magnetic circuit (110) including a magnetic separation (111), a voice coil body (120) inserted in the magnetic separation (111), a diaphragm (130) coupled with the voice coil body (120), a transmission member (150) located on one side of the magnetic circuit (110) and separated by a predetermined distance from the magnetic circuit (110) and transmitting an electrical signal that is input to the voice coil body (120), and a resin housing (140) integrated with the magnetic circuit (110) and the transmission member (150), wherein the transmission member (150) includes an exposed outer portion (151) and an exposed inner portion (152).

Description

SPEAKER Field of Invention This description refers to a loudspeaker that converts an electrical signal into an acoustic sound. Background of the Invention Patent Literature 1 (PTL) describes a loudspeaker comprising a magnetic circuit and a housing made of resin, both integrated by insert molding. PTL 2 describes a loudspeaker comprising a damper that, in turn, includes a conductor transmitting an electrical signal; the damper is integrated with the conductor by insert molding. List of Citations Patent Literature PTL 1: Japanese Publication of Unexamined Patent Application No. H01-316843 PTL 2: Japanese Publication of Unexamined Patent Application No. H09-307992 Summary of the Invention Technical Problem A connection terminal that will be connected to an external wiring harness is attached to a speaker. When the external wiring connected to the speaker is pulled, the speaker's connection terminal or a piece of resin could break. Ref. 345763 to which the connection terminal is attached. Furthermore, for the damper that includes a conductor formed in its arm by insert molding, it is likely that the arm will lose its weight balance, leading to the occurrence of a voice coil body wobble. One objective of the present description is to provide a loudspeaker that can withstand being pulled by an external wire and that includes the damper that can suppress the rocking phenomenon of a voice coil body. Solution to the Problem The loudspeaker according to the present description includes a magnetic circuit which in turn includes a magnetic separation; a voice coil body positioned and inserted in the magnetic separation; a diaphragm coupled with the voice coil body; transmission members positioned on one side of the magnetic circuit along the magnetic circuit with a predetermined separation to transmit an electrical signal to be input to the voice coil body; and a housing made of a resin and integrated with the magnetic circuit and the transmission members. Herein, the transmission members include the externally exposed portions that are exposed outside the housing; and the internally exposed portions that are exposed inside the housing. > tu r\ c N. acc σ N Advantageous Effects of the Invention In the loudspeaker described herein, the transmission members extending along the magnetic circuit are integrated with the resin housing. For this reason, loudspeaker breakup can be suppressed even when a force is applied, for example, when the externally exposed portion is pulled. Furthermore, because the connecting members also function as damper arms, a loudspeaker can be provided that transmits an electrical signal to the voice coil body while ensuring the damper's balance to suppress the swaying effect. Brief Description of the Figures Figure 1 shows a perspective view illustrating the loudspeaker according to a modality observed from the front side. Figure 2 shows a perspective view illustrating the speaker according to the observed modality from the rear side. Figure 3 shows a cross-sectional view of the loudspeaker according to the modality. Figure 4 shows a perspective view illustrating the positional relationship between the magnetic circuit, transmission members and the like, where the housing is omitted. Figure 5 shows a perspective view illustrating the damper, voice coil body, and transmission members. Detailed Description of the Invention From this point forward, a speaker configuration according to this description will be described with reference to the figures. The configuration shown below is illustrative, as the examples describe the present information and should not be interpreted as limitations to this description. For example, the shapes, structures, materials, components, relative positional relationships, connection states, numerical values, expressions, step contents in the methods, step order, and the like shown in the following configurations are examples and may contain elements not described below in some cases. When geometric expressions such as parallel and orthogonal are used, these expressions do not indicate strictly mathematical meanings and contain substantially permissible differences, deviations, and the like.Likewise, expressions such as simultaneous and identical also contain substantially permissible intervals. The figures are schematic diagrams subject to emphasis, omission, or appropriate adjustment of proportions to describe the present description and have shapes, positional relationships, and proportions different from the actual shapes, positional relationships, and proportions. From this point forward, a plurality of modalities will be described, generally, as one modality in some cases. Some of the content described later will be described as optional components related to this description. The loudspeaker, according to one aspect of the present description, includes a magnetic circuit comprising a magnetic separation; a voice coil body positioned and inserted within the magnetic separation; a diaphragm coupled with the voice coil body; transmission members positioned along the magnetic circuit at a predetermined spacing to transmit an electrical signal to be input to the voice coil body; and a housing made of resin and integrated with the magnetic circuit and the transmission members. Herein, the transmission members include the externally exposed portions that are visible outside the housing; and the internally exposed portions that are visible within the housing. Accordingly, because the transmission members that extend along the magnetic circuit are integrated with the housing, speaker breakage and transmission member drop can be prevented even when a force is applied, for example, when the externally exposed portion is pulled. The loudspeaker according to another aspect of the present description includes a magnetic circuit having a magnetic separation; a voice coil body positioned and inserted in the magnetic separation; a diaphragm coupled with the voice coil body; connecting members connected with the voice coil body to transmit an electrical signal to be input to the voice coil body; a housing that accommodates the magnetic circuit and the voice coil body; and the damper that connects the voice coil body to the housing.Here, the damper includes an outer ring that is ring-shaped and is coupled to the housing; an inner ring that is ring-shaped and is coupled to the voice coil body; and at least two arms, each extending along a radial direction with respect to a winding axis of the voice coil body as a center to connect the outer ring to the inner ring, and each of the connecting members extending along the radial direction with respect to the winding axis of the voice coil body as a center, penetrates through the outer ring and the inner ring and is retained between at least the two arms by the damper. Accordingly, a loudspeaker can be provided which can transmit an electrical signal to the voice coil body while suppressing the wobbling phenomenon. Figure 1 shows a perspective view illustrating the loudspeaker according to a configuration viewed from the front. Figure 2 shows a perspective view illustrating the loudspeaker according to the configuration viewed from the side. Figure 3 shows a cross-sectional view of the loudspeaker according to the configuration. As illustrated in these figures, the loudspeaker 100 includes the magnetic circuit 110, the voice coil body 120, the diaphragm 130, the housing 140, and the drive members 150. In the case of the present configuration, the loudspeaker 100 includes the damper 160, the connecting members 170, and the cover 180. In this description and the claims, with respect to the magnetic circuit 110, the side near the diaphragm 130 is referred to as the front side (side Z+ in the figures), and the side near the diaphragm 130 is referred to as the rear side (side Z- in the figures). In the present embodiment, the loudspeaker 100 is illustrated as a loudspeaker mounted on a moving body such as a vehicle. The loudspeaker 100 is a compact loudspeaker that can be embedded in a limited space within the moving body. In this description, the term "compact" is sometimes used to refer to a loudspeaker that includes the housing 140, which has an inner diameter of cm or less. Although a compact loudspeaker is described, a larger loudspeaker may be used without limitation. The magnetic circuit 110 is a component that generates a continuous magnetic flux in the magnetic gap 111. This continuous magnetic flux acts as a changing magnetic flux in response to an electrical signal input to the voice coil body 120. The magnetic circuit 110 is integrally coupled with the housing 140 to be located behind the diaphragm 130, and includes the annular magnetic gap 111, which is opposite the diaphragm 130. The magnetic gap 111 is a gap in which a continuous magnetic flux is generated in the direction that crosses the magnetic flux generated in the voice coil body 120. In the case of the present modality, the magnetic circuit 110 is of an external magnet type and includes the ring-shaped (cylindrical) magnet 112, which is magnetized and positioned coaxially with the winding axis of the voice coil body 120; the ring-shaped front surface plate 113, which is coaxially positioned with the winding axis of the voice coil body 120 on a surface of the magnet 112 closer to the diaphragm 130; and the rear surface member 114 positioned on a rear surface side of the magnet 112 opposite the front surface plate 113. The rear surface member 114 includes the center post 115 which is inserted from a center portion into a through hole of the front surface plate 113 to define the magnetic separation 111 with the front surface plate 113. The rear surface member 114 and the center post 115 are integrally formed. The front surface plate 113 and the rear surface member 114, which includes the center post 115, are made of a magnetic material. Preferably, the magnet 112 used is a neodymium magnet with, for example, high magnetic energy. This can reduce the thickness of the magnet 112 and thus the overall thickness of the speaker 100. Furthermore, the weight can also be reduced. Alternatively, the speaker 100 can have an external magnet-type structure that includes a ferrite magnet. In the present embodiment, the magnet 112 is a permanent magnet with a through-hole through which the central post 115 is inserted. The magnet 112 has an N-pole at one end and an S-pole at the other end in the thickness direction (the Z-axis direction in the figures). The front surface plate 113 is fixed to a surface of the magnet 112 corresponding to one of the poles, and the rear surface member 114 is fixed to a surface corresponding to the other pole. The outer diameter of the magnet 112 is smaller than the outer diameter of the front surface plate 113. The outer diameter of the magnet 112 is also smaller than the maximum diameter of the rear surface member 114 (excluding the portion corresponding to the central post 115).Specifically, the dimensional relationship between the outer diameters of the magnet 112, the front surface plate 113, and the rear surface member 114 is implemented by adjusting the maximum dimensional tolerance value of the outer diameter of the magnet 112 to be smaller than the minimum dimensional tolerance values ​​of the outer diameters of the front surface plate 113 and the rear surface member 114. When the housing 140 is molded, a resin material is filled into the outer circumferential surface of the magnet 112, which is a recessed portion of the magnetic circuit 110, and the magnetic circuit 110 is held firmly by the housing 140 due to an anchoring effect. The far end of the central post 115 defines a magnetic separation, and the near end serves as the positioner 116, which has a larger diameter than the far end to position the magnet 112 inserted during the assembly of the magnetic circuit 110. The magnet 112 is a set placed in the positioner 116, and the dimensions are adjusted so that the surface > S κ c N acc σ N outer circumferential surface of the magnet 112 is not projected from the outer circumferential surfaces of the rear surface member 114 and the front surface plate 113 even in the state where part of the inner circumferential surface of the magnet 112 is in support with part of the outer circumferential surface of the positioner 116. The center post 115 includes the tapered portion 117 which has a diameter that decreases from the positioner 116 towards the far end to prevent chipping or breakage of the magnet 112 when the magnet 12 is inserted into the center post 115. The voice coil body 120 is a part that has one end placed inside the magnetic gap 111 of the magnetic circuit 110 and the other end coupled with the diaphragm 130. The voice coil body 120 generates a magnetic flux as a function of an input electrical signal and vibrates in the direction of the winding axis (the Z-axis direction in the figures) as a result of the interaction with a magnetic flux generated by the magnetic circuit 110. The winding axis (center axis) of the voice coil body 120 is placed in the vibration direction (amplitude) of the diaphragm 130 (the Z-axis direction in the figures) and is orthogonal to the direction of the magnetic flux within the magnetic separation 111. In the present embodiment, the voice coil body 120 includes a coil made of a single material of metallic wire wound multiple times in an annular (cylindrical) shape and a coil holder around which the coil is wound. The coil holder is a tubular member made of a material such as aluminum or resin. Its front end is attached to the diaphragm 130, and its rear end is placed within the magnetic separator 111. The voice coil body 120 included in the loudspeaker 100 can be any other voice coil body different from the one described above, and a coil without a used coil holder can be used, for example, in a micro loudspeaker. The diaphragm 130 is a member connected to the voice coil body 120 and generates sound by moving back and forth (along the Z-axis in the figures) from its neutral position, in response to the vibration of the voice coil body 120, which in turn vibrates the air. In this particular model, the outer circumferential portion of the diaphragm 130 includes the flexible and elastic rim 131, the conical connection 132 with a hole into which the voice coil body 120 is inserted to connect rim 131 to the voice coil body 120, and the cap 133 that covers the hole in the connection 132. Diaphragm 130 can be of any shape without limitation, and examples of its shape include circular cone shapes, oval cone shapes, and pyramidal shapes. Diaphragm 130 can be a flat shape, such as a circular plate shape, an oval plate shape, or a flat plate shape. Diaphragm 130 can be made of any material without limitation, and examples of materials include paper and resins. Diaphragm 130 can be a single member, rather than a plurality of divided parts. Figure 4 shows a perspective view illustrating the positional relationship between the magnetic circuit, transmission members, and the like, where the housing is omitted. The transmission members 150 are members that extend along the side of the magnetic circuit 110 at a predetermined separation and transmit an electrical signal to be input to the voice coil body 120. Each transmission member 150 includes the externally exposed portion 151, which is exposed outside the housing 140, and the internally exposed portion 152, which is exposed inside the housing 140. In the present embodiment, the transmission member 150 is a thin, plate-shaped metal member molded by stamping a metal plate and bent into an L-shape extending towards the rear surface side of the magnetic circuit 110. This bending of the > S κ c N acc σ N elongated transmission members 150 allow the transmission members 150 to be embedded within the housing 140 and integrated with the housing 140. This configuration can increase or improve the strength of the coupling between the transmission member 150 and the housing 140. The transmission members 150 can be made of any material, provided they can transmit an electrical signal. In the present embodiment, tin or phosphor bronze is used. Two transmission members 150 are positioned 180 degrees apart with respect to the winding axis of the voice coil body 120, which is centered on the winding axis. In this arrangement, the internally exposed portions 152 of the transmission members 150 are symmetrically positioned with respect to the winding axis of the voice coil body 120. Similarly, two connecting members 170, each electrically connecting the internally exposed portion 152 to the voice coil body 120, are radially positioned with respect to the winding axis of the voice coil body 120. In this configuration, the connecting members 170 can suppress the induction of the swaying phenomenon when the voice coil body 120 moves. The externally exposed portion 151 of each transmission member 150 projects in a direction perpendicular to the bend direction of the transmission member 150 body. Two externally exposed portions 151 are parallel. The externally exposed portions 151 of the transmission members 150 function as male connecting lugs to be connected with an external connector (not shown). Each of the internally exposed portions 152 is narrower than the width of the transmission member 150 body and is inserted into clevis portions at the distant ends of the connecting members 170. Housing 140 is a box-shaped member that accommodates and retains the magnetic circuit 110 and is integrated with the magnetic circuit 110 and the transmission members 150. In the present embodiment, the housing 140 as a whole is in a lower cylindrical shape and integrally includes the retaining portion 141, which integrally retains the magnetic circuit 110 and the transmission members 150; the intermediate portion 142, which accommodates the damper 160 and the like; and the frame 143, to which the diaphragm 130 and the cover 180 are attached. Housing 140 also integrally includes the projection 144, which runs along each transmission member 150 and projects outward from the retaining portion 141. By forming the projection 144 on the surface of the retaining portion 141, the retention strength of the transmission member 150 is improved without > S κ c N acc σ N increase the total thickness of the housing 140. The housing 140 also integrally includes the connector frame 145, which is positioned to surround the externally exposed portions 151 of the transmission members 150 and is positioned to retain an external connector (not illustrated) electrically connected to the externally exposed portions 151. The connector frame 145 is a portion to which an external connector is attached for connecting the loudspeaker 100 to an amplifier or the like. When a male connector located at the far end of the amplifier's output cable is inserted into the connector frame 145, the connector frame 145 allows electrical connection of the male connector to the externally exposed portions 151 projecting within the connector frame 145.In this configuration, when the electrical wire connected to the external connector is pulled with a strong force, the connector frame 145 can absorb and reduce the force applied to the externally exposed portions 151. In this way, failure such as deflection of the transmission member 150 from the housing 140 can be avoided. As can be seen, the connector frame 145 can be shaped to function as a male connector. Housing 140 includes the damper coupling 146, which is ring-shaped and coaxial with the winding axis of the voice coil body 120. It projects forward from the front side of the magnetic circuit 110 and is coupled to the damper coupling 160. The diaphragm coupling 147 is positioned outside the damper coupling 146, concentrically with it, and is coupled to the edge 131 of the diaphragm 130. The damper coupling 146 and the diaphragm coupling 147 are integrally positioned within the intermediate portion 142. The internally exposed portions 152 of the transmission members 150 are exposed between the damper coupling 146 and the diaphragm coupling 147. The housing 140 can be configured from any material. In the present embodiment, the housing 140 is an insert-molded article made of polycarbonate. The breakdown temperature of polycarbonate is -100°C or lower, and the loudspeaker 100, which includes the polycarbonate housing 140, can withstand significant temperature changes. When the housing 140 is molded, the magnetic circuit 110 and the drive members 150 are coupled by insert molding. The housing 140 includes the mounting portion 148, which is integrally fitted with it and has a through-hole for attaching the housing 140 to another structured body. Figure 5 shows a perspective view illustrating the damper, a voice coil body, and the drive members. The damper 160 is a member that assists in the linear movement of the voice coil body 120 in the back-and-forth direction (the Z-axis direction in the figure), and includes the outer ring 161, the inner ring 162, and the arms 163. The outer ring 161 is a ring-shaped portion that is coupled with the damper coupling 146 of the housing 140. In the present embodiment, the outer ring 161 has a cross-section that is rectangular in shape. The inner ring 162 is a ring-shaped portion that is coupled to the outer circumferential surface of the voice coil body 120 and is positioned concentrically (coaxially) with the outer ring 161. In the present embodiment, the inner ring 162 has a cross-section that is rectangular, as is the outer ring 161. In the present embodiment, the thickness of the inner ring 162 in the diameter direction is smaller than that of the outer ring 161, and its thickness in the back and front directions (the Z-axis direction in the figure) is also smaller than that of the outer ring 161. The arm 163 is a member extending radially with respect to the winding axis of the voice coil body 120, which serves as the center for connecting the outer ring 161 and the inner ring 162. These rings are positioned coaxially with the winding axis of the voice coil body 120, acting as a bridge. It is sufficient for the damper 160 to include at least two arms 163. In the present embodiment, the damper 160 includes six arms 163. The arms 163 are slat-shaped, having a small thickness in the forward and backward directions and a large width in the diameter direction. They are curved to form waves with respect to the winding axis of the voice coil body 120. This configuration ensures a long stroke for the inner ring 162, which moves reciprocally with the voice coil body 120 relative to the outer ring 161.In other words, each arm 163 includes the forward-projecting peak 164 and the rearward-receding valley 165, with the peak 164 and valley 165 continuing in the diameter direction. In the present embodiment, each arm 163 includes a peak 164 and a valley 165. When the curve state of a portion closer to the outer ring 161 in one of the adjacent arms 163 is peak 164, the curve state of a portion closer to the outer ring 161 in the other arm 163 is valley 165. That is, the adjacent arms 163 in the diameter direction are curved to form waves, waves in one of the adjacent arms 163 having phases opposite to those of the waves in the other. The adjacent arms 163 have different widths in the circumferential direction. In the case of the present modality, the 160 shock absorber includes four 163 arms that have a larger width and two 163 arms that have a smaller width.The narrower 163 arm is positioned between two wider 163 arms at a 45-degree interval. Two sets of 163 arms arranged in this manner are positioned 180 degrees apart. Although in this particular configuration an 163 arm has the same diameter width, the 163 arm may have varying diameter widths, for example, it may be fan-shaped. Each connecting member 170 is a member connected to the voice coil body 120 to transmit an electrical signal that will be input to the voice coil body 120 and extends radially with respect to the winding axis of the voice coil body 120 as its center. Each connecting member 170 passes through the outer ring 161 and the inner ring 162 and is held between the arms 163 by the damper 160. In the present embodiment, each connecting member 170 is of a slat shape having a smaller thickness in the forward and backward directions and a larger width in the diameter direction. As with the arm 163, each connecting member 170 includes a peak and a valley and is curved to form waves that have opposite phases to those of the waves in the adjacent arms 163 in the diameter direction.The connecting member 170 has a different circumferential width than the adjacent arms 163, and the width of the connecting member 170 is close to the width of the narrower arm 163. Although in the present embodiment a connecting member 170 has the same diameter width, the connecting member 170 may have a width that varies in the diameter direction; for example, it may be fan-shaped. As previously described, in the damper 160, the connecting members 170 and the arms 163 are positioned radially with respect to the winding axis of the voice coil body 120, centered at a 45-degree interval. The narrower arm 163, or connecting member 170, is positioned between the wider arms 163, which are positioned at a 90-degree interval. The arms 163 and their adjacent connecting member 170 are curved to form waves that are in opposite phases in the forward and backward directions. The damper 160 is made of resin, and the outer ring 161, inner ring 162, and arms 163 are integrally molded. The connecting members 170 are insert-molded when the damper 160 is integrally molded and are integrated with the damper 160. The connecting member 170 can be made of any material, provided it can transmit an electrical signal. Connecting member 170 performs the same function as arm 163 and is part of the damper 160. Consequently, connecting member 170 is preferably an elastic member possessing flexibility and elasticity. In this embodiment, tin or phosphor bronze is used, as in transmission member 150. To achieve the same flexibility and elasticity as the resin-made arm 163, connecting member 170 has a smaller thickness than the resin-made arm 163. The cover 180 is placed on the front side of the diaphragm 130 to protect the diaphragm 130. The rim 131 is fixed between the cover 180 and the diaphragm coupling 147 to improve the coupling strength of the diaphragm 130. A method for producing the loudspeaker 100 is described below. The magnetic circuit 110 and the drive members 150 are placed in a mold, and the polycarbonate for forming the housing 140 is injected into the mold, followed by insert molding. In this way, an intermediate part is produced. This method allows for the production of a one-stage intermediate part in which the magnetic circuit 110 and the drive members 150 are held by the housing 140 in a predetermined positional relationship while ensuring isolation, thereby significantly simplifying the overall assembly process of the loudspeaker 100. The voice coil body 120 is inserted into the hole in the inner ring 162 of the damper 160 until it reaches a predetermined position. The predetermined position indicates a position where the ends of each of the connecting members 170 that penetrate through the inner ring 162 and protrude to the front (or rear) side of the inner ring 162 are supported by the terminals 121 located on the outer circumferential surface of the voice coil body 120. The terminals 121 are electrically connected to the ends of the voice coil body 120. The voice coil body 120 and the damper 160 are joined with an adhesive or similar material. The connecting members 170 and the terminals 121 of the voice coil body 120 are electrically connected by soldering or similar means. Diaphragm connection 132 130 is coupled to voice coil body 120 and cover 133 is coupled to connection 132. Next, the outer ring 161 of the damper 160 is coupled with the damper coupling 146 of the housing 140, and the voice coil body 120 is positioned and inserted into the magnetic gap of the magnetic circuit 110. At this time, the internally exposed portions 152 of the drive members 150 are inserted into the forked portions at the far ends of the connecting members 170 to position the damper 160 and the voice coil body 120 with respect to the housing. Next, the internally exposed portions 152 of the transmission members 150 are electrically connected to the connecting members 170 by soldering or similar means. Then, the rim 131 is coupled to the connecting member 132 and the diaphragm coupling 147 with adhesive or similar means. Finally, the cover 180 is inserted into the frame 143 of the housing 140 and coupled with the housing 140 to press against the periphery of the rim 131. In this way, the loudspeaker 100 is assembled. In the loudspeaker 100 described above, the material and shape of the connecting member 170 are established such that the connecting member 170 connects the outer ring 161 of the damper 160 and the inner ring 162 thereof as a bridge to demonstrate the same function as the arm 163. In this way, the total weight of the damper 160 and the elastic performance of the > S κ c N acc σ N are balanced, allowing the suppression of the voice coil body sway phenomenon 120. Furthermore, the connecting members 170 are integrated with the outer ring 161, the inner ring 162, and the arms 163 by means of insert molding. This configuration stabilizes the positional relationship between the arms 163 and the connecting member 170 and also suppresses the voice coil body 120 wobble. Additionally, it simplifies the assembly process of the loudspeaker 100. Furthermore, the transmission members 150 that extend at least along the side of the magnetic circuit 110 are integrated with the housing 140. In this way, positional deviation of the transmission member 150 with respect to the housing 140, or displacement of the transmission member 150 from the housing 140, can be suppressed even when the externally exposed portion 151 of the transmission member 150 is subjected to a strong force. Because the worker does not assemble or put together the housing 140, the transmission members 150, and the magnetic circuit 110, the accuracy of their positional relationship can be stabilized, and the assembly process of the loudspeaker 100 can be simplified. Because the diameter of the outer circumferential surface of the magnet 112 is smaller than those of the outermost circumferential surfaces of the front surface plate 113 and the rear surface member 114, a resin can be filled in the space between the front surface plate 113 and the rear surface member 114, and in this way the magnetic circuit 110 can be firmly fixed in the housing 140 due to an anchoring effect. Because the 150 transmission members are symmetrically positioned in a 180-degree positional relationship, a resin can be uniformly injected near the 150 transmission members during insert molding and can relax thermal shock or similar. As can be seen, the present description is not limited to the embodiment described above. For example, the embodiments according to this description may include embodiments that, in turn, include any combination of the components described herein, and other embodiments implemented by excluding some of the components. This description also covers modifications obtained by subjecting the above embodiment to a variety of modifications devised by persons skilled in the art without departing from the essence of this description, namely, without departing from the meanings of the terms and expressions described in the claims. For example, although the shock absorber arms 163 > S κ c N acc σ N 160, excluding the connecting members 170 integrated with the damper 160, have been described as portions made of a resin and integrated with the outer ring 161 and the inner ring 162. At least two of the arms 163 may be made of a metal identical to the metal of the connecting members 170. In this case, the arms 163 made of a different metal from the connecting members 170 are not electrically connected to the voice coil body 120 and function as models or patterns for the connecting members 170. The speaker 100 can include any type of magnetic circuit 110 and the magnetic circuit 110 of an internal magnet type can be used. Although the case where the magnetic circuit 110 and the transmission members 150 are integrated with the housing 140 has been described, the magnetic circuit 110 and the transmission members 150 can be separated from the housing 140, and the magnetic circuit 110 can be assembled by a worker or similar personnel. The housing 140 can be made of a material other than resin. To reduce the lowest resonant frequency of the 100 speaker and to improve sound quality, the 100 speaker can be configured without a damper. Alternatively, the damper 160 can be coupled with the diaphragm 130, rather than with the coil body > S κ c N acc σ N of voice 120. Industrial Applicability This description can be used to describe speakers that convert an electrical signal into an acoustic sound. List of reference numbers 100 speaker 110 magnetic circuit 111 magnetic separation 112 magnet 113 front surface plate 114 rear surface member 115 center post 116 positioner 117 tapered portion 120 voice coil body 121 terminal 130 diaphragm 131 rim 132 connection 133 cap 140 housing 141 retaining portion 142 intermediate portion 143 frame 144 projection 145 connector frame 146 shock absorber coupling 147 diaphragm coupling 148 fixing portion 150 transmission members 151 externally exposed portion 152 internally exposed portion 160 shock absorber 161 outer ring 162 inner ring 163 arm 164 peak 165 valley 170 connection member 180 cover It is hereby stated that, as of this date, the best method known to the applicant to implement the aforementioned invention is the one that is clear from the present description of the invention.

Claims

Having described the invention as above, the following claims are claimed as property:

1. A loudspeaker characterized in that it comprises: a magnetic circuit including a magnetic gap; a voice coil body positioned and inserted in the magnetic gap; a diaphragm coupled with the voice coil body; transmission members positioned on a lateral side of the magnetic circuit along the magnetic circuit with a predetermined separation for transmitting an electrical signal to be input to the voice coil body; and a housing made of a resin and integrated with the magnetic circuit and the transmission members, wherein the transmission members include: externally exposed portions that are exposed outside the housing; and internally exposed portions that are exposed inside the housing.

2. The loudspeaker according to claim 1, characterized in that the externally exposed portions of the transmission members are connection terminals to be connected with an external connector, and the housing integrally includes a connector frame that retains the external connector.

3. The loudspeaker according to claim 1 or 2, characterized in that the transmission members extend towards a side of the rear surface of the magnetic circuit from the side of the magnetic circuit.

4. The loudspeaker according to any of claims 1-3, characterized in that each of the transmission members is made of a metal plate.

5. The loudspeaker according to any of claims 1-4, characterized in that the transmission members, totaling two, are positioned in a 180-degree relationship with respect to a winding axis of the voice coil body as a center.

6. The loudspeaker according to any of claims 1-5, characterized in that the magnetic circuit includes: a ring-shaped magnet coaxially positioned with the winding axis of the voice coil body; a rear surface member positioned on a rear surface side of the magnet; and a front surface plate ring-shaped and positioned on a front surface side of the magnet coaxially with the winding axis, the magnet having a smaller outer diameter than the outer diameter of the front surface plate.

7. The loudspeaker according to any of claims 1-6, characterized in that the magnetic circuit includes: a ring-shaped magnet coaxially positioned with the winding axis of the voice coil body; a rear surface member positioned on the rear surface side of the magnet; and a front surface plate ring-shaped and positioned on a front surface side of the magnet coaxially with the winding axis, the rear surface member including: a positioner inserted in the magnet for positioning the magnet; and a tapered portion having a diameter that decreases from the positioner in a front direction.

8. The loudspeaker according to any of claims 1-7, characterized in that the housing integrally includes: a damper coupling that is ring-shaped coaxial with the winding axis of the voice coil body and projects forward from a front side of the magnetic circuit and to which the damper is coupled; and a diaphragm coupling that is positioned outside the damper coupling concentrically with the damper coupling and to which the diaphragm is coupled, and each of the internally exposed portions of the transmission members is exposed between the damper coupling and the diaphragm coupling.

9. The loudspeaker according to any of claims 1-8, characterized in that the housing is formed from polycarbonate.

10. A loudspeaker characterized in that it comprises: a magnetic circuit having a magnetic gap; a voice coil body positioned and inserted in the magnetic gap; a diaphragm coupled with the voice coil body; connecting members connected to the voice coil body for transmitting an electrical signal to be input to the voice coil body; a housing adapting the magnetic circuit and the voice coil body; and a damper connecting the voice coil body to the housing, wherein the damper includes: an outer ring that is ring-shaped and coupled with the housing; an inner ring that is ring-shaped and coupled with the voice coil body;and at least two arms, each extending along a radial direction with respect to a winding axis of the voice coil body as a center to connect the outer ring to the inner ring, and each of the connecting members extending along the radial direction with respect to the winding axis of the voice coil body as a center, penetrates through the outer ring and the inner ring and is retained between at least the two arms by the damper.; 11. The loudspeaker according to claim 10, characterized in that the connecting members are curved to form waves with respect to the winding axis as the center.

12. The loudspeaker according to claim 10 or 11, characterized in that at least the two arms are curved to form waves with respect to the winding axis as the center.

13. The loudspeaker according to claim 11 or 12, characterized in that at least the two arms > tu r\ c N. acc σ N adjacent to each other are curved to form waves, the waves of one of at least the two arms having phases opposite to the wave phases of the other of at least the two arms.

14. The loudspeaker according to any of claims 10-13, characterized in that at least the two arms adjacent to each other have different widths in a circumferential direction.

15. The loudspeaker according to any of claims 10-14, characterized in that at least the two arms are made of a metal.

16. The loudspeaker according to claim 10, characterized in that the outer ring, the inner ring and at least the two arms are integrated and the connecting members are insert-molded when the damper is formed.

17. The loudspeaker according to claim 16, characterized in that each of the connecting members is insert molded with the outer ring and the inner ring.

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