JP2012257096A - Speaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact and slender type speaker that enhances input resistance and has excellent workability.SOLUTION: A joint member 13 of a speaker has a front stage portion 13a joined to a diaphragm 2 and a rear stage portion 13b joined to a voice coil bobbin 4. The front stage portion 13a has a slender shape, the length at the short-diameter side of the front stage portion 13a is equal to or smaller than the length at the short-diameter side of the diaphragm 2, and the inner diameter of the rear stage portion 13b has a shape longer than the length at the short-diameter side of the diaphragm 3. A movable portion is joined to the rear stage portion 13b through a linear portion 22b to form a curved surface portion 22c at a joint place between the linear portion 22b and the rear stage portion 22c. Accordingly, the voice coil bobbin 4 is joined to the diaphragm 2 through the joint member 13, so that the voice coil diameter can be increased and the joint strength can be enhanced by the formation of the curved surface portion 22c. Therefore, the input resistance can be increased and the working efficiency can be enhanced.

Description

  The present invention relates to a speaker, and more particularly to an elongated speaker having an elliptical shape or a track shape.

  Speakers are widely used not only for home audio equipment and in-vehicle audio equipment, but also for personal computers, mobile phones, game machines, and various electronic devices. As electronic devices are becoming smaller and thinner, speakers are also required to be smaller and thinner when they are made smaller and thinner. Therefore, even smaller and thinner speakers are required. There is a need for higher performance. For higher performance, in addition to excellent sound quality, high input resistance is required. As electronic devices become smaller and thinner, it is necessary to install speakers in a limited space, and in the case of elongated spaces, the speakers must also be elongated. In order to achieve high input resistance, it is necessary to increase the diameter of the voice coil. However, since the elongated speaker has a short diameter dimension, the voice coil diameter cannot be increased and it is difficult to achieve high input resistance. When the voice coil diameter is increased without changing the minor axis dimension of the elongated speaker, there is a problem that the edge width of the diaphragm is reduced and the amplitude of the diaphragm is limited, resulting in a narrow reproduction band.

  In such an elongated speaker, the upper end of the voice coil is notched and a non-coupling portion is provided on the short diameter side of the diaphragm, so that the edge width of the diaphragm can be secured and the reproduction band can be widened. A speaker with a large diameter and improved input resistance has been proposed (see, for example, Patent Document 1).

  The speaker described in Patent Document 1 has a configuration in which a non-coupled portion is provided by notching the upper end of a voice coil on the short diameter side of a track-shaped diaphragm. As a result, even if the voice coil diameter is increased, the collision between the voice coil and the edge can be prevented when the voice coil is driven by the non-coupled portion, so that the input resistance of the speaker can be improved.

Japanese Patent No. 3956485

  However, the speaker described in Patent Document 1 requires a work for cutting out the upper end of the voice coil, and requires a predetermined alignment when joining the voice coil and the diaphragm, resulting in poor work efficiency. There is.

  In view of the above problems, an object of the present invention is to provide a small and slender speaker that is improved in input resistance and excellent in workability.

In order to solve the above-described problems, a speaker according to the present invention includes a frame, an elongated diaphragm, an edge whose inner periphery is bonded to the diaphragm, an outer edge that is bonded to the frame, and a coil wound around a voice coil bobbin. In a speaker provided with a voice coil that is rotated and vibrates the diaphragm, and a magnetic circuit,
A damper structure comprising a coupling member joined to the diaphragm and joined to the voice coil bobbin wound with the voice coil, and a movable part having one end joined to the coupling member and the other end joined to a damper support. With
The coupling member includes a front stage part joined to the diaphragm, and a rear stage part joined to the voice coil bobbin that is joined to the front stage part and wound with the voice coil,
The front stage part of the coupling member has an elongated shape, and the length of the minor axis side of the front stage part is the same as or smaller than the length of the minor axis side of the diaphragm, and the inner diameter of the rear stage part is the same as that of the diaphragm. It has a shape that is larger than the length of the minor axis side,
The movable part functions as a damper, and the movable part is joined to the rear stage part via a linear part connected to the movable part, and a curved surface part is formed at a joint portion between the linear part and the rear stage part. It is characterized by that.

  According to this configuration, since the voice coil bobbin around which the voice coil is wound can be joined to the diaphragm via the coupling member, the voice coil diameter can be increased, and the coupling member and the movable part can be firmly joined, so A small elongated speaker excellent in workability can be provided because the improvement can be achieved and the joining of the voice coil bobbin can be facilitated.

  ADVANTAGE OF THE INVENTION According to this invention, while improving an input tolerance, the small elongate speaker excellent in workability | operativity can be provided.

It is a disassembled perspective view of the speaker which concerns on the form of Example 1 of this invention. It is a perspective view which shows the damper structure shown in FIG. It is a figure for demonstrating the state which joined the damper structure to the diaphragm. It is a figure which shows the state which mounted | wore with the voice coil bobbin which wound the voice coil in the figure shown in FIG. It is a perspective view which shows the damper structure in the speaker which concerns on the form of Example 2 of this invention. It is a minor axis direction sectional view of the speaker concerning the form of Example 2 of the present invention. It is the A section enlarged view shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<Example 1>
1 is an exploded perspective view of a loudspeaker according to a first embodiment of the present invention, FIG. 2 is a perspective view showing a damper structure shown in FIG. 1, and FIG. 3 illustrates a state in which the damper structure is joined to a diaphragm. FIG. 4 is a diagram showing a state in which a voice coil bobbin around which a voice coil is wound is mounted on the diagram shown in FIG.

  As shown in FIG. 1, a speaker 1 according to an embodiment of the present invention is an elongated speaker and includes two voice coils 4 a. Reference numeral 2 denotes an elongated diaphragm, and an edge 3 is formed on the outer periphery of the diaphragm 2. 6 is a frame, 21 is a damper structure, 4 is a voice coil bobbin, and a voice coil 4 a is wound around the voice coil bobbin 4. The magnetic circuit 7 includes a pole piece 9, a magnet 10, and a pot yoke 12. The voice coil bobbin 4 around which the voice coil 4a is wound and the magnetic circuit 7 are attached to the damper structure 21, and the diaphragm 2 and the damper structure 21 are attached to the frame 6 to constitute the speaker 1.

  As shown in FIG. 2, the damper structure 21 is formed by injection molding using a resin, and includes a coupling member 13 including a front stage portion 13 a joined to the back surface of the diaphragm 2 and a rear stage portion 13 b joined to the voice coil bobbin 4. The damper portion 22 is joined to the rear stage portion 13b and the damper support portion 23. The front stage portion 13a joined to the diaphragm 2 is formed in an elongated shape according to the elongated diaphragm 2 (for example, a track shape, an oval shape, etc.), and the rear stage portion 13b joined to the front stage portion 13a is a voice coil 4a. In order to join the cylindrical voice coil bobbin 4 wound around, a ring shape is formed.

  The damper part 22 includes a straight part 22b joined to the rear stage part 13b and a movable part 22a connected to the straight part 22b. The movable part 22a functions as a damper. The straight portion 22b is formed in a plate shape and is joined to the end surface 13c of the rear stage portion 13b. The movable portion 22a connected to the straight portion 22b is a plate-like member formed in a wave shape. Moves and functions as a damper. One end of the movable portion 22 a is connected to the linear portion 22 b, and the other end is joined to the damper support portion 23. The front-stage part 13a, the rear-stage part 13b, the linear part 22b, the movable part 22a, and the damper support part 23 are integrally formed by resin injection molding. And in the joining of the back | latter stage part 13b and the linear part 22b, the curved surface part 22c by a fillet is provided in four places.

  FIG. 3 is a diagram for explaining a state in which the damper structure 21 is joined to the back surface of the diaphragm 2. For convenience, only the coupling member 13 is shown in the damper structure 21. As shown in FIG. 3, the front stage portion 13 a joined to the diaphragm 2 has an elongated shape, and the dimension of the minor diameter side of the elongated front stage section 13 a is the same as or smaller than the dimension of the minor diameter side of the diaphragm 2. Set and joined. The front stage portion 13a and the diaphragm 2 are joined by an adhesive applied to the end surface of the front stage portion 13a. The rear stage part 13b joined to the front stage part 13a has an annular shape, and the inner diameter of the rear stage part 13b is not limited by the minor diameter side dimension of the diaphragm 2 as shown in FIG. The diameter can be made larger than the side dimension.

  4 is a view showing a state in which the voice coil bobbin 4 around which the voice coil 4a is wound is joined to the diaphragm 2 shown in FIG. As shown in FIG. 4, the voice coil bobbin 4 around which the voice coil 4a is wound has a cylindrical shape, and one side of the cylindrical voice coil bobbin 4 is fitted into the annular rear stage portion 13b, and the inner periphery of the rear stage portion 13b. To put on. At this time, the end surface of the voice coil bobbin 4 contacts the front step portion 13a and is positioned. The voice coil bobbin 4 and the rear stage 13b are joined by an adhesive or the like.

  Therefore, as shown in FIG. 4, the diameter of the voice coil 4 a can be made larger than the minor axis side dimension of the diaphragm 2 without being restricted by the minor axis side dimension of the diaphragm 2. Can be input.

  The voice coil bobbin 4 is improved in workability because it is not necessary to perform predetermined alignment when the upper end of the voice coil such as the speaker described in Patent Document 1 is cut out or when the voice coil and the diaphragm are joined. As a result, work efficiency can be improved.

  Furthermore, as shown in FIG. 2, the damper structure 21 is provided with a curved surface portion 22c by a fillet at a joint portion between the rear stage portion 13b and the linear portion 22b. The curved surface portion 22c is formed in the linear portion 22b and is not formed in the region of the movable portion 22a. By forming the curved surface portion 22c at the joining portion between the rear stage portion 13b and the straight portion 22b, the joining between the rear step portion 13b and the straight portion 22b can be strengthened. For this reason, even if a high input signal is input to the voice coil 4a, peeling or breakage at the joint portion between the rear stage portion 13b and the linear portion 22b does not occur.

  In particular, when the speaker 1 is small, the width of the straight portion 22b is reduced, and thus the formation of the curved portion 22c is effective because the bonding strength between the rear stage portion 13b and the straight portion 22b can be improved. The curved surface portion 22c formed at the joint portion between the rear stage portion 13b and the linear portion 22b is formed at the same time as the damper structure 21 is molded.

  In addition, when the curved surface part 22c by a fillet is formed in the area | region of the movable part 22a, since the minimum resonance frequency of the speaker 1 will change as a result of changing the stiffness of the movable part 22a largely, it is not preferable.

<Example 2>
5 is a perspective view showing a damper structure in the speaker according to the second embodiment of the present invention, FIG. 6 is a cross-sectional view in the minor axis direction of the speaker according to the second embodiment of the present invention, and FIG. It is the enlarged view of A section shown, and is the figure which showed the joining location of the back | latter stage part 13b of the coupling member 13, and the linear part 22b of the damper part 22. FIG.

  The damper structure 31 according to the embodiment 2 shown in FIG. 5 and the damper structure 21 according to the embodiment 1 shown in FIG. 2 are different in the joining state of the rear stage portion 13b and the linear portion 22b.

  In addition, the common member attaches | subjects the same referential mark, and abbreviate | omits description suitably.

  In the damper structure 21 according to the form of the first embodiment shown in FIG. 2, the linear portion 22 b is configured to be joined to the end surface 13 c of the rear stage portion 13 b of the coupling member 13, but in the form of the second embodiment shown in FIG. 5. The damper structure 31 has a configuration in which the straight portion 22b is joined to the outer peripheral surface 13d of the rear stage portion 13b of the coupling member 13. As in the first embodiment, the curved surface portion 22c is formed at the joint portion between the rear stage portion 13b of the coupling member 13 and the straight portion 22b. In particular, as shown in FIG. 7, the curved surface portion 22c is formed on the plane of the straight portion 22b. It is formed. Although the rear stage part 13b and the straight part 22b of the coupling member 13 are integrally formed by resin injection molding, there is no boundary, but in FIG. 7, the boundary between the rear stage part 13b and the linear part 22b of the coupling member 13 is not illustrated. It is indicated by a broken line. The second embodiment also has the same effect as the first embodiment.

  In the description of the embodiment, the speaker structure including two voice coils has been described. However, the present invention is not limited to this, and may be an elongated speaker including one voice coil.

DESCRIPTION OF SYMBOLS 1 Speaker 2 Diaphragm 3 Edge 4 Voice coil bobbin 4a Voice coil 6 Frame 7 Magnetic circuit 9 Pole piece 10 Magnet 12 Pot yoke 13 Connecting member 13a Front stage part 13b Rear stage part 13c End face 13d Outer peripheral surface 21, 31 Damper structure 22 Damper part 22a Movable part 22b Linear part 22c Curved part 23 Damper support part

Claims (6)

A frame, an elongated diaphragm, an edge whose inner periphery is joined to the diaphragm, an outer edge is joined to the frame, a voice coil wound around a voice coil bobbin to vibrate the diaphragm, and a magnetic A speaker comprising a circuit,
A damper structure comprising a coupling member joined to the diaphragm and joined to the voice coil bobbin wound with the voice coil, and a movable part having one end joined to the coupling member and the other end joined to a damper support. With
The coupling member includes a front stage part joined to the diaphragm, and a rear stage part joined to the voice coil bobbin that is joined to the front stage part and wound with the voice coil,
The front stage part of the coupling member has an elongated shape, and the length of the minor axis side of the front stage part is the same as or smaller than the length of the minor axis side of the diaphragm, and the inner diameter of the rear stage part is the same as that of the diaphragm. It has a shape that is larger than the length of the minor axis side,
The movable part functions as a damper, and the movable part is joined to the rear stage part via a linear part connected to the movable part, and a curved surface part is formed at a joint portion between the linear part and the rear stage part. A speaker characterized by that. The speaker according to claim 1, wherein the curved portion is formed on the straight portion. The speaker according to claim 1, wherein the straight line portion is joined to an end surface of the rear stage portion. The speaker according to claim 1, wherein the straight portion is joined to an outer peripheral surface of the rear stage portion. The speaker according to any one of claims 1 to 4, wherein the movable part is formed in a wave shape. The said curved member is formed simultaneously when the said connection member and the said damper structure are integrally formed by injection molding of resin, The any one of Claim 1 thru | or 5 characterized by the above-mentioned. Speaker.