JP2012257097A - Speaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact and slender speaker that can increase input resistance and has excellent workability.SOLUTION: A speaker has a dumper structure 21 having a joint member 13 joined to a diaphragm 2 and a voice coil bobbin 4, and a movable portion 22a which is joined to the joint member 13 at one end and joined to a dumper support member 23 at the other end. The joint member 13 has a front stage portion 13a joined to the diaphragm 2 and a rear stage portion 13b joined to the voice coil bobbin 4. The front stage portion 13a has a slender shape and the length at the short-diameter side thereof is equal to or smaller than the length at the short-diameter side of the diaphragm 2. The front stage portion 13a has a bridge portion 14 having a hole 14c. The inner diameter of the rear stage portion 13b has a shape longer than the length at the short-diameter side of the diaphragm 2. 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 to the diaphragm 2 can be enhanced by the bridge portion 14. 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 an operation of cutting out the upper end of the voice coil and joins the upper end surface of the voice coil to the diaphragm when joining the voice coil and the diaphragm. Is not always enough. For this reason, when a high input signal is input to the voice coil, there is a possibility that peeling or breakage may occur at the joint portion between the upper end surface of the voice coil and the diaphragm.

  In view of the above problems, an object of the present invention is to provide an elongated speaker that is improved in input resistance and improved in strength of bonding between a voice coil bobbin and a diaphragm.

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 which is joined to the front stage part and wound with the voice coil, and the front stage part of the coupling member has an elongated shape. A length of a short side of the front stage is the same as or smaller than a length of a short side of the diaphragm, and a bridging part having a hole is formed, and an inner diameter of the rear stage is the vibration The movable part has a shape larger than the length of the minor axis side of the plate, the movable part functions as a damper, the movable part is joined to the rear stage part via a linear part connected to the movable part, and the linear part A curved surface portion is formed at a joint portion with the rear stage portion.

  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 diaphragm can be firmly joined by the bridging portion. Since the input resistance can be improved and the voice coil bobbin can be easily joined, a small and slender speaker excellent in workability is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the elongate speaker which aimed at the improvement of input-proof and improvement of the joining strength of a voice coil bobbin and a diaphragm can be provided.

It is a disassembled perspective view of the speaker of this invention. It is sectional drawing in the minor axis direction of the speaker shown in FIG. 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 the damper structure shown in FIG. 4 with the voice coil bobbin which wound the voice coil.

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

  1 is an exploded perspective view of a loudspeaker according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view of the loudspeaker according to Embodiment 1 of the present invention in the minor axis direction, and FIG. 3 is a damper shown in FIG. 4 is a perspective view showing the structure, FIG. 4 is a diagram for explaining a state in which the damper structure is joined to the diaphragm, and FIG. 5 is a state in which a voice coil bobbin around which a voice coil is wound is mounted on the damper structure shown in FIG. 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.

  FIG. 2 is a cross-sectional view in the minor axis direction of the speaker according to the embodiment of the present invention, and shows a state where the diaphragm 2 is joined to the front stage portion 13a of the coupling member 13. As shown in the drawing, a plurality of holes 14c penetrating to the back surface 14b side are formed in the joint surface 14a of the bridging portion 14. After the adhesive is applied to the joint surface 14a, when the diaphragm 2 is joined to the joint surface 14a, excess adhesive travels from the hole 14c to the back surface 14b side. For this reason, as a result that an appropriate amount of adhesive can be interposed between the diaphragm 2 and the joint surface 14a without an excessive amount of adhesive staying, a good adhesive state can be obtained. The hole 14c has a shape in which the diameter gradually decreases from the bonding surface 14a side toward the back surface 14b side. For this reason, the amount of the adhesive that wraps around the back surface 14b is controlled and stays around the outlet on the back surface 14b side. For this reason, the adhesive can be firmly fixed to the diaphragm 2 and the joint surface 14a by solidifying the adhesive in a state where it is in communication with the joint surface 14a and the back surface 14b.

  FIG. 3 is a view showing the damper structure 21 shown in FIG. The damper structure 21 is formed by injection molding using resin. The damper structure 21 is joined to the joining member 13 including the front stage part 13a joined to the back surface of the diaphragm 2 and the rear stage part 13b joined to the voice coil bobbin 4 and the rear stage part 13b. It consists of a damper part 22 and a damper support 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.

  In addition, a bridging portion 14 is formed in the minor diameter direction in the front stage portion 13 a that is joined to the diaphragm 2. Since the end surface 13 d of the front stage portion 13 a and the joint surface 14 a of the bridging portion 14 are joined to the diaphragm 2, these surfaces are formed in the same curved shape as the diaphragm 2. Further, a plurality of holes 14c penetrating to the back surface 14b side are formed on the bonding surface 14a of the bridging portion 14 (three holes 14c are formed in the figure). The hole 14c has a shape in which the diameter gradually decreases from the bonding surface 14a side toward the back surface 14b side, and is formed in, for example, a conical shape.

  In addition, although the bridge | crosslinking part 14 in this embodiment is formed in the breadth direction of the front | former step part 13a, it is not limited to this, You may form in the major axis direction of the front | former step part 13a.

  The shape and number of the holes 14c are not limited to those in the embodiment, and the shape and number are set as necessary.

  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 23. The front-stage part 13a, the rear-stage part 13b, the linear part 22b, the movable part 22a, and the damper support body 23 are integrally formed by resin injection molding.

  FIG. 4 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. 4, the front stage portion 13 a to be joined to the diaphragm 2 has an elongated shape, and the dimension on the short diameter side of the elongated front stage section 13 a is the same as or smaller than the dimension on the short diameter side of the diaphragm 2. Set and joined. The front stage part 13a and the diaphragm 2 are joined by an adhesive applied to the end surface 13d of the front stage part 13a. The rear stage 13b joined to the front stage 13a has an annular shape, and the inner diameter of the rear stage 13b is 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 do.

  FIG. 5 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. 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 attached to the inner periphery of the rear stage portion 13b. 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, the diameter of the voice coil 4a 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. As a result, high input resistance can be achieved.

  In the description of the present 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 End face 14 Bridging part 14a Joining face 14b Back face 14c Hole 21 Damper structure 22 Damper part 22a Movable part 22b Straight line part 23 Damper support body

Claims (5)

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 part of the coupling member has an elongated shape, and the length of the short diameter side of the front part is the same as or smaller than the length of the short diameter side of the diaphragm, and a bridging part in which a hole is formed. With
The inner diameter of the rear stage has a shape that is larger than the length of the minor axis side of the diaphragm,
The speaker is characterized in that 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. The speaker according to claim 1, wherein the bridging portion is formed by bridging in the minor axis direction of the front stage portion. The speaker according to claim 1, wherein the bridging portion is formed by bridging in a major axis direction of the front stage portion. The speaker according to claim 1, wherein the bridging portion is provided on a joint surface to be joined to the diaphragm, the hole is formed in the joint surface, and the hole is a through hole. 5. The speaker according to claim 1, wherein a diameter of the hole gradually decreases from the bonding surface side to the back surface side of the bridging portion.