Speaker and mobile body

Abstract

To perform adhesion between a damper and connection lines.SOLUTION: A speaker 100 includes: a cylindrical bobbin 111; a voice coil 112 wound around one end part of the bobbin 111; a magnetic circuit 120 having a tubular magnetic gap in which the voice coil 112 is arranged; a frame 130 to which the magnetic circuit 120 is attached; a diaphragm 140 connected to the bobbin 111 and the frame 130; a damper 150 connected to an outer peripheral surface of the bobbin 111 and connected to the magnetic circuit 120 or the frame 130; and a pair of first connection lines 161 for inputting an electric signal to the voice coil 112. The first connection line 161 adheres to at least one part on a front surface of the damper 150 with the use of an adhesive 170 which is elastically deformed by following a difference of a deformation state between the first connection lines 161 and the damper 150.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a speaker that converts an electrical signal into sound, and a mobile object equipped with the speaker. [Background technology]

[0002] For example, as described in Patent Documents 1 and 2, a technique has been proposed in which tinsel wire (golden thread wire) that curves in accordance with the ripple-like curved surface of the damper is adhered to the damper. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-22576 [Patent Document 2] Japanese Patent Application Laid-Open No. 2002-218593 Summary of the Invention [Problem to be solved by the invention]

[0004] However, if the entire wavy tinsel wire is glued to the damper with adhesive to match the wave shape of the damper, the weight of the damper will increase, raising concerns about a decline in sound performance.

[0005] The present disclosure provides an improved speaker and a vehicle equipped with the improved speaker. [Means for solving the problem]

[0006] A speaker according to one aspect of the present disclosure comprises a cylindrical bobbin, a voice coil wound around one end of the bobbin, a magnetic circuit having a tubular magnetic gap in which the voice coil is disposed, a frame to which the magnetic circuit is attached, a diaphragm connected to the bobbin and the frame or the magnetic circuit, a damper connected to the outer surface of the bobbin and connected to the magnetic circuit or the frame, and a pair of first connecting wires that input an electrical signal to the voice coil, the first connecting wires being adhered at at least one point to the surface of the damper with an adhesive that elastically deforms in response to the difference in deformation state between the first connecting wires and the damper.

[0007] A moving body according to one aspect of the present disclosure comprises a cylindrical bobbin, a voice coil wound around one end of the bobbin, a magnetic circuit having a tubular magnetic gap in which the voice coil is disposed, a frame to which the magnetic circuit is attached, a diaphragm connected to the bobbin and the frame or the magnetic circuit, a damper connected to the outer surface of the bobbin and connected to the magnetic circuit or the frame, and a pair of first connecting wires that input an electrical signal to the voice coil, wherein the first connecting wires comprise one or more speakers that are adhered at at least one location on the surface of the damper with an adhesive that elastically deforms in response to the difference in deformation state between the first connecting wire and the damper. [Effects of the Invention]

[0008] The speaker and the moving object according to the present disclosure can be further improved. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 2 is a perspective view showing the speaker from the front side. [Figure 2] FIG. 2 is a perspective view showing the speaker with the diaphragm, frame, etc. omitted. [Figure 3] FIG. [Figure 4] FIG. 10 is a perspective view showing another example 1 of an adhesive mode between the damper and the first connecting wire. [Figure 5] FIG. 10 is a perspective view showing another example of an adhesive mode between the damper and the first connecting wire. [Figure 6] FIG. 10 is a perspective view showing another shape of the damper. [Figure 7] FIG. 1 is a diagram showing a simple example of a moving object. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of a speaker according to the present disclosure will be described with reference to the drawings. Note that the following embodiments are presented as examples to explain the present disclosure and are not intended to limit the present disclosure. For example, the shapes, structures, materials, components, relative positional relationships, connection states, numerical values, mathematical formulas, the content of each step in a method, and the order of each step shown in the following embodiments are merely examples and may include content not described below. Furthermore, while geometric expressions such as parallel and orthogonal may be used, these expressions do not indicate mathematical precision and include substantially acceptable errors, deviations, and the like. Furthermore, expressions such as simultaneous and identical also include substantially acceptable ranges.

[0011] Furthermore, the drawings are schematic diagrams in which emphasis, omission, or adjustment of proportions has been appropriately made in order to explain the present disclosure, and the shapes, positional relationships, and proportions may differ from the actual shapes, positional relationships, and proportions.

[0012] In addition, multiple inventions may be collectively described below as one embodiment, and some of the content described below may be described as optional components related to the present disclosure.

[0013] FIG. 1 is a perspective view showing speaker 100 from the front. FIG. 2 is a perspective view showing speaker 100 without diaphragm 140, frame 130, etc. FIG. 3 is a cross-sectional view of speaker 100. Note that the type, shape, structure, and size of speaker 100 are not particularly limited. Speaker 100 includes bobbin 111, voice coil 112, magnetic circuit 120, frame 130, diaphragm 140, damper 150, first connecting wire 161, and adhesive 170.

[0014] Voice coil 112 is a component in which a conducting wire capable of transmitting an electric signal such as an audio signal is wound into a coil shape. Voice coil 112 generates a magnetic flux based on the input electric signal, and generates a force that vibrates in the winding axis direction of voice coil 112 (Z-axis direction in the figure) through interaction with the steady magnetic flux generated by magnetic circuit 120.

[0015] The bobbin 111 is a cylindrical component around one end of which the voice coil 112 is wound. The bobbin 111 is disposed so that the voice coil 112 wound around one end is positioned within the magnetic gap 121 of the magnetic circuit 120, and the other end is attached to the diaphragm 140. A damper 150 is attached to the bobbin 111 between the voice coil 112 and the diaphragm 140. In this embodiment, the tube axis of the bobbin 111, the winding axis (central axis) of the voice coil 112, and the direction of vibration (amplitude) of the diaphragm 140 (Z-axis direction in the figure) are aligned, and are perpendicular to the direction of the magnetic flux in the magnetic gap 121. The material constituting the bobbin 111 is not limited, and examples thereof include aluminum, paper, and resin.

[0016] Magnetic circuit 120 is a component that generates a steady magnetic flux in magnetic gap 121 that acts on the magnetic flux that changes based on the electrical signal input to voice coil 112. Magnetic circuit 120 is disposed behind diaphragm 140 (Z-side in the figure), and forms an annular magnetic gap 121 that faces diaphragm 140. Magnetic gap 121 is an air gap that generates a steady magnetic flux in a direction that intersects with the magnetic flux generated in bobbin 111.

[0017] The magnetic circuit 120 may be an internal magnet type or an external magnet type. In the present embodiment, the magnetic circuit 120 is an internal magnet type and includes a yoke 122, a first magnet 123, a top plate 124, and a second magnet 125.

[0018] Yoke 122 is made of a magnetic material and is a component that concentrates the magnetic flux generated by first magnet 123 into magnetic gap 121. The shape of yoke 122 is not limited, but in this embodiment, yoke 122 is in the shape of a cylindrical container with a bottom, and houses first magnet 123 and top plate 124.

[0019] First magnet 123 is a component that generates a steady magnetic flux. The shape of first magnet 123 is not limited, but in this embodiment, it is disk-shaped. First magnet 123 is attached to the bottom surface inside yoke 122 and is not in contact with the inner circumferential surface of yoke 122. One end of first magnet 123 in the thickness direction (Z-axis direction in the figure) is an N pole and the other end is an S pole. The type of first magnet 123 is not limited, and examples include a neodymium magnet and a ferrite magnet. Note that using a neodymium magnet as first magnet 123 allows the thickness of first magnet 123 to be thin, and the thickness of speaker 100 as a whole to be thin. Furthermore, weight reduction can be achieved.

[0020] Top plate 124 is made of a magnetic material and is a component that, together with yoke 122, concentrates the magnetic flux generated by first magnet 123 into magnetic gap 121. Top plate 124 is attached to the end face of first magnet 123 opposite the end face to which yoke 122 is attached. The shape of top plate 124 is not limited, but in this embodiment, top plate 124 is disk-shaped, and magnetic gap 121 is formed between the outer peripheral surface of top plate 124 and the inner peripheral surface of yoke 122.

[0021] Second magnet 125 is attached to the end face of top plate 124 opposite to the end face to which first magnet 123 is attached, and is a magnet for strengthening the magnetic flux generated in magnetic gap 121. The shape of second magnet 125 is not limited, but in this embodiment, second magnet 125 is disk-shaped.

[0022] The frame 130 is a structural member that holds the magnetic circuit 120 and the diaphragm 140 and positions the magnetic circuit 120 and the diaphragm 140 in a predetermined position. The frame 130 also functions as a mounting member for mounting the speaker 100 to another member. The overall shape of the frame 130 is not limited. The material that constitutes the frame 130 is not limited, and examples include resin and metal.

[0023] Diaphragm 140 is a member to which bobbin 111 is connected, and generates sound by vibrating the air by being displaced in the front-to-rear direction (Z-axis direction in the drawing) based on the vibration of bobbin 111 from a neutral position. In the present embodiment, an annular edge 141 having flexibility and restoring property is attached to the outer periphery of diaphragm 140, and diaphragm 140 is attached to frame 130 via edge 141. Diaphragm 140 has a hole in the center through which bobbin 111 is inserted, and this hole is closed by dome-shaped cap 142.

[0024] The shape of diaphragm 140 is not limited, and examples thereof include a cone, an elliptical cone, and a pyramid, and it may also be a flat shape such as a disk, an elliptical plate, or a flat plate. The material constituting diaphragm 140 is not limited, and examples thereof include paper and resin.

[0025] The damper 150 is a member that is located on the outer periphery of the bobbin 111 and is connected to the voice coil 112 and the diaphragm 140 in a bridging manner, and is connected to the frame 130 or the magnetic circuit 120. The damper 150 is flexible and resilient, and helps to prevent the reciprocating motion of the bobbin 111 from fluctuating when the speaker 100 is driven. The shape of the damper 150 is not limited, but in this embodiment, it is annular and has a wavy, rippled shape. The base material of the damper 150 is not limited, but examples include aramid fiber, cotton, elastomer, and metal.

[0026] The first connecting wire 161 is a conducting wire that inputs an electric signal to the voice coil 112. The speaker 100 includes a pair of first connecting wires 161 electrically connected to both ends of the voice coil 112, respectively. The first connecting wires 161 are wired in contact with the damper 150 or in a state of near contact via the adhesive 170, but are not curved to follow the ripple-like waveform of the damper 150, and are wired in a manner that bridges adjacent peaks of the waveform of the damper 150. In other words, the first connecting wires 161 do not contact the valleys of the waveform of the damper 150. In this embodiment, the first connecting wires 161 are wired straight, and the pair of first connecting wires 161 are wired so as to be parallel to each other.

[0027] The type of first connecting wire 161 is not limited, and examples include enamel wire and copper foil wire. In the present embodiment, first connecting wire 161 is tinsel wire (golden wire). Unlike ordinary vinyl electric wires and Litz wires, tinsel wire has excellent flexibility and bendability, and can flexibly follow the vibration of damper 150 when speaker 100 is driven.

[0028] The adhesive 170 bonds the damper 150 and the first connecting wire 161 at least at one location on the surface of the damper 150. The type of adhesive 170 is not limited, but a type of adhesive 170 that, when hardened, elastically deforms in response to the difference between the deformation of the damper 150 and the deformation of the first connecting wire 161 when the speaker 100 is operating is used. Specifically, an acrylic adhesive can be used as the adhesive 170. An adhesive that hardens with ultraviolet light hardens quickly, improving the efficiency of the speaker 100 assembly process. Furthermore, the hardness of the hardened adhesive 170 is preferably selected from the range of 10 or more and less than 80 (Shore hardness (Type A)). If the hardness is less than 10, the first connecting wire 161 tends to be unstable when fixed to the damper 150. If the hardness is 80 or more, the first connecting wire 161 and / or the damper 150 tend to harden, adversely affecting the acoustic characteristics. Furthermore, the elastic modulus of the adhesive 170 after hardening is preferably selected from the range of 1 or more and less than 100 (MPa). If the elastic modulus is less than 1, the fixation of the first connecting line 161 to the damper 150 tends to become unstable, and if the elastic modulus is 100 or more, it becomes difficult to realize the movement of the adhesive 170 that compensates for the difference between the movement of the first connecting line 161 and the movement of the damper 150, which tends to have an adverse effect on the acoustic characteristics.

[0029] In this embodiment, the first connection wire 161 is adhered to the top of the corrugated damper 150 with adhesive 170 applied in dots at multiple locations. This reduces the amount of adhesive 170 applied, and also reduces the increase in weight of the damper 150 due to the adhesive 170.

[0030] The present invention is not limited to the above-described embodiments. For example, the present invention may be embodied in another embodiment by arbitrarily combining the components described in this specification or by excluding some of the components. Furthermore, the present invention also includes various modifications that would occur to a person skilled in the art without departing from the spirit of the present invention, i.e., the meaning of the wording of the claims.

[0031] For example, instead of being adhered to the damper 150 by dot-like adhesive 170, the first connecting line 161 may be adhered by a line-like adhesive 170 extending along the first connecting line 161 on the surface of the damper 150, as shown in FIG. 4.

[0032] 5, the speaker 100 may include a pair of connection terminals 163 to which an electric signal is input, and a pair of second connection wires 162 that respectively connect the pair of connection terminals 163 and the pair of first connection wires 161. The first connection wires 161 may be bonded by a second adhesive 172 of the same type as the adhesive 170 that connects the first connection wire 161 and the damper 150 at a connection portion 155 (see FIG. 3) where the damper 150 is connected to the frame 130 (or the magnetic circuit 120), or a second adhesive 172 of a different type from the adhesive 170. The second connection wires 162 may be electrically connected to the first connection wires 161 at the connection portion 155 to which the second adhesive 172 is applied. The second connection wires 162 do not have to be of the same type as the first connection wires 161.

[0033] Furthermore, the wiring form of the first connection lines 161 is not limited, and they may be wired radially as shown in FIG.

[0034] Furthermore, instead of attaching the first connecting wire 161 to all of the peaks of the corrugated shape of the damper 150 with adhesive 170, one first connecting wire 161 may be connected to the damper 150 at one or two points using adhesive 170.

[0035] Furthermore, the damper 150 may have a flat, non-wavy shape. In this case, the first connection line 161 is connected to the damper 150 at any point on the damper 150 using the adhesive 170.

[0036] Furthermore, the shape of the damper 150 is not limited to an annular shape, but may be, for example, a shape with a part of the annular shape cut out, as shown in FIG.

[0037] Furthermore, the mobile object 200 may include at least one of the above speakers 100. Fig. 7 is a cross-sectional view of an automobile, which is one example of the mobile object 200, to which the speaker 100 is attached. The mobile object 200 may include the speaker 100 on the front panel, pillars, doors, seats, headrests, etc., in addition to the rear tray. The speaker 100 is used as part of a car navigation system or car audio system.

[0038] (summary) The first embodiment of the speaker 100 comprises a cylindrical bobbin 111, a voice coil 112 wound around one end of the bobbin 111, a magnetic circuit 120 having a tubular magnetic gap in which the voice coil 112 is disposed, a frame 130 to which the magnetic circuit 120 is attached, a diaphragm 140 connected to the bobbin 111 and the frame 130, a damper 150 connected to the outer surface of the bobbin 111 and connected to the magnetic circuit 120 or the frame 130, and a pair of first connecting wires 161 for inputting an electric signal to the voice coil 112, the first connecting wires 161 being bonded at at least one point to the surface of the damper 150 by an adhesive 170 that elastically deforms in response to the difference in deformation state between the first connecting wire 161 and the damper 150.

[0039] According to the first aspect, even if the damper 150 and the first connecting wire 161 deform in different states when the speaker 100 is driven, the adhesive 170 elastically deforms, thereby suppressing the effect of the deformation of the first connecting wire 161 on the deformation of the damper 150. Therefore, even in the speaker 100 in which the damper 150 and the first connecting wire 161 are bonded together, it is possible to suppress deterioration in sound quality. Furthermore, by bonding the damper 150 and the first connecting wire 161 together, it is possible to reduce the thickness of the speaker 100.

[0040] The speaker 100 of the second embodiment includes the speaker 100 of the first embodiment, and the first connection wire 161 is adhered to the damper 150 at a plurality of locations with adhesive 170 in the form of dots.

[0041] According to the second aspect, it is possible to suppress an increase in the weight of the damper 150 due to the adhesive 170, and it is possible to suppress a decrease in the sound performance of the speaker 100.

[0042] The speaker 100 of the third embodiment includes the first embodiment or the second embodiment, and the damper 150 has a wavy curved shape, and the first connecting wire 161 is bonded to the top of the damper 150.

[0043] According to the third aspect, the damper 150 and the first connection line 161 can be easily connected with the adhesive 170 .

[0044] The speaker 100 of the fourth embodiment includes the first embodiment, and is bonded by linear adhesive 170 along a first connecting line 161 extending on the surface of the damper 150.

[0045] According to the fourth aspect, when the speaker 100 is driven, the movement of the first connecting wire 161 can be made similar to the movement of the damper 150, thereby preventing stress from concentrating on a part of the first connecting wire 161 and placing a heavy burden on the first connecting wire 161.

[0046] The fifth aspect of speaker 100 includes any of the first to fourth aspects, and is provided with a pair of connection terminals 163 to which an electrical signal is input, and a pair of second connection wires 162 that respectively connect the pair of connection terminals 163 and a pair of first connection wires 161, the first connection wires 161 being adhered by adhesive 170 or a type of adhesive 170 different from adhesive 170 at connection portion 155 where damper 150 is connected to magnetic circuit 120 or frame 130, and the second connection wires 162 are connected to the first connection wires 161 at connection portion 155.

[0047] According to the fifth aspect, the first connecting wire 161 and the damper 150 are substantially integrated, and the connecting terminal and the first connecting wire 161 are connected by the second connecting wire 162. This allows a wire material that can deform together with the damper 150 to be used for the first connecting wire 161, and a wire material suitable for this to be used for the second connecting wire 162, which does not move even when the speaker 100 is driven, thereby improving the design freedom of the speaker 100.

[0048] The speaker 100 of the sixth aspect includes any one of the first to fifth aspects, and the hardness of the adhesive 170 is 10 or more and less than 80.

[0049] The speaker 100 of the seventh aspect includes any one of the first to sixth aspects, and the adhesive 170 has an elastic modulus of 1 or more and less than 100.

[0050] The moving object 200 of the eighth aspect includes one or more speakers 100 of any one of the first to seventh aspects.

[0051] According to the eighth aspect, it is possible to make information, music, etc. resonate in the moving body 200 with high quality sound. [Industrial Applicability]

[0052] The present disclosure can be used in speakers that convert electrical signals into sound. [Explanation of symbols]

[0053] 100 speakers 111 Bobbin 112 voice coil 120 Magnetic Circuit 121 Magnetic Gap 122 York 123 First Magnet 124 Top Plate 125 Second Magnet 130 frames 140 Diaphragm 141 Edge 142 Cap 150 Damper 155 Connection 161 First connecting line 162 Second connecting line 163 Connection terminal 170 Adhesive 200 Mobile

Claims

1. A cylindrical bobbin, a voice coil wound around one end of the bobbin; a magnetic circuit having a tubular magnetic gap in which the voice coil is disposed; a frame to which the magnetic circuit is attached; a diaphragm connected to the bobbin and the frame or the magnetic circuit; a damper connected to an outer peripheral surface of the bobbin and connected to the magnetic circuit or the frame; a pair of first connecting lines for inputting an electrical signal to the voice coil; The first connecting line is The first connecting line and the damper are bonded at at least one location on the surface of the damper by an adhesive that elastically deforms in accordance with the difference in deformation state between the first connecting line and the damper. Speaker.

2. The first connecting line is The damper is bonded at a plurality of locations with the adhesive in dots.

2. The speaker according to claim 1.

3. The damper is It has a ripple-like curved shape, The first connecting line is Glued at the top of the damper 3. A speaker according to claim 1 or 2.

4. The first connecting line is The adhesive is bonded in a linear form along the first connecting line extending on the surface of the damper.

2. The speaker according to claim 1.

5. The speaker includes: a pair of connection terminals to which an electrical signal is input; a pair of second connection lines respectively connecting the pair of connection terminals and the pair of first connection lines; The first connecting line is the damper is bonded to the magnetic circuit or the frame at a connection portion by the adhesive or a type of adhesive different from the adhesive, The second connecting line is The connecting portion is connected to the first connecting line.

2. The speaker according to claim 1.

6. The hardness of the adhesive is 10 or more and less than 80 2. The speaker according to claim 1.

7. The elastic modulus of the adhesive is 1 or greater and less than 100 2. The speaker according to claim 1.

8. A speaker comprising one or more speakers according to claim 1. Mobile object.

Images