JP3820656B2 - Slender voice coil bobbin and speaker using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an elongated voice coil bobbin used in various acoustic devices and a speaker using the same.
[0002]
[Prior art]
A conventional loudspeaker will be described with reference to FIG 5. FIG 4. Figure 4 is a side sectional view of the elongated speaker conventional track shape, FIG. 5 is a perspective view of the elongated type voice coil Le of track shape used in the speaker.
[0003]
According to the figure, 1 is a magnetic circuit comprising upper and lower plates and a magnet, 2 is a frame attached to the magnetic circuit 1, 3 is an outer periphery coupled to the frame 2, and an inner periphery is a voice coil bobbin 4 Is a diaphragm coupled to the. Reference numeral 5 denotes a damper whose outer periphery is coupled to the frame 2 and whose inner periphery is coupled to the voice coil bobbin 4 so that a part of the voice coil bobbin 4 is fitted in the magnetic gap 1 a of the magnetic circuit 1.
[0004]
A voice coil 4a is wound around a portion of the voice coil bobbin 4 fitted in the magnetic gap 1a to constitute a speaker.
[0005]
Now be described with reference to FIG. 5, the voice coil, the voice coil bobbin 4 e is formed by curling the hard aluminum, paper, Bobinshi bets consisting rectangular of Kapton or the like, wound around the voice coil 4a by winding jig, the voice coil bobbin 4 e upper portion of the reinforcing sheet 4f joining (by winding the voice coil 4a in the voice coil bobbin 4 e) so-called voice coil of the speaker components of constituted the.
[0006]
[Problems to be solved by the invention]
However, the voice coil bobbin down 4 e of the conventional this type, high withstand input of are difficult design and production processes on the quality by the gap failure had a problem of unstable.
[0007]
The reason is first after completion of the voice coil bobbin down 4 e composed of bobbin sheet, since the restoring force due to spring back of returning the bobbin sheet is always original sheet form is acting, by the reinforcing sheet 4 f not be secured fixed even if the shape is, since the voice coil bobbin down 4 e is a shape curved shape stability performance is poor, over a circle a voice coil bobbin down 4 e within the magnetic gap 1a, the center Therefore, it is difficult to arrange them at the same time, and it is difficult to design high input resistance. That is, when the voice coil 4a is not arranged in the center of the magnetic gap 1a and even a part of one circumference is slightly decentered, the voice coil bobbin 4 has a large amplitude when a large input is applied. the voice coil bobbin 4 e is in contact gap failure had a problem that tends to occur in the magnetic gap 1a. Further, this phenomenon has a problem that not only a problem of high input resistance but also a gap defect in a general speaker production process is likely to occur.
[0008]
An object of the present invention is to solve such a conventional problem, to provide an excellent voice coil bobbin which can achieve high input resistance and is very stable in quality.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, a voice coil bobbin according to the present invention has a pair of bobbin sheets made up of a straight part and an arc part formed by curling at both ends thereof, provided with slits , and at least the abutted part is reinforced paper. The voice coil bobbin that forms an elongated track shape formed by joining together, and the restoring force due to the springback generated by the curling process is dispersed by making a pair of bobbin sheets, that is, two bobbin sheets, so that the voice coil bobbin This prevents deformation, prevents abnormal sounds due to gap defects, and enables high input resistance.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, a pair of bobbin sheets composed of a linear portion and a circular arc portion formed by curling both ends thereof are butted together by providing a slit , and at least the butted portion is joined by a reinforcing paper. This is a voice coil bobbin that forms a slender track shape that is configured together, and the restoring force due to the spring back generated by curling processing is dispersed by using two bobbin sheets to prevent deformation of the voice coil bobbin , and the straight part to prevent deformation or waving when the voice coil winding to prevent the generation of abnormal sound due to defective gap of the speaker and the bulge at the time of formation inhibition, and makes it possible a high input resistance of.
[0011]
The invention according to claim 2 of the present invention has a structure in which a pair of bobbin sheet previously processed voice coil bobbin according to claim 1, wherein were dimensionally stable, not previously processed to form stabilized By using the pair of bobbin sheets, the restoring force of the voice coil bobbin is further suppressed to prevent deformation, thereby contributing to higher input resistance of the speaker.
[0012]
According to a third aspect of the present invention, a magnetic circuit having a magnetic gap, a frame attached to the magnetic circuit, an outer periphery is coupled to the frame, and an inner periphery is fitted to the magnetic gap. are those voice coil is constituted by a diaphragm coupled to the voice coil bobbin according to claim 1 or claim 2 Symbol placing wound, in which high withstand input of the speaker can be realized.
[0013]
The following describes an embodiment of a voice coil bobbin of the present invention from FIG. 1 to FIG. 3.
[0014]
(Embodiment 1 )
Figure 1 is a perspective view of a bobbin sheet is a main part of the voice coil bobbin of a speaker of the implementation of elongated form in the form (track-type) of the present invention, FIG 2 is a perspective view of the voice coil Le, 3 Is a top view of the same.
[0015]
According to the figure, 14a and 14b are bobbin sheets made of hard aluminum that are hot-press-molded into a shape having a circular arc part b at both ends of the straight line part a. A voice coil bobbin 14 having a track shape is formed by joining paper 15. The voice coil 16 is wound around the voice coil bobbin 14 and incorporated into a track-shaped elongated speaker (not shown).
[0016]
Since the voice coil bobbin 14 is formed as described above, it is possible to suppress swelling and deformation generated in the linear portion a due to residual stress generated when connecting together as in the prior art, and to occur in the linear portion a when the voice coil 16 is wound. It is possible to prevent deformation such as the undulating phenomenon.
[0017]
As in the first embodiment, the number of bobbin sheets to be divided is appropriately selected according to the shape and material of the voice coil bobbin depending on the type of the speaker. It is possible to achieve the object of the present invention by suppressing the spring back only by abutting and joining the bobbin sheets, and it goes without saying that such a thing is also within the technical scope of the present invention.
[0018]
Further, Oite the form status of the embodiments are not particularly described speaker, but known elongated type by using the voice coil bobbin 14 of the present invention in place of the speaker voice coil bobbin of the (Track-type) of the input resistance It is possible to provide an improved elongated (track type) speaker.
[0019]
【The invention's effect】
The voice coil bobbin according to the present invention is a slender structure in which a pair of bobbin sheets composed of a linear part and a circular arc part formed by curling at both ends thereof are abutted by providing a slit , and at least the abutting part is joined by a reinforcing paper. of a voice coil bobbin to form a track shape, the restoring force by the scan pulling back and dispersed by a bobbin sheet on a plurality preventing deformation of the voice coil bobbin, thereby preventing the occurrence of abnormal noise due to the gap defect, High input resistance is possible.
[Brief description of the drawings]
[1] side of the voice perspective view of one embodiment of a coil bobbin perspective view of one embodiment of a voice coil of the present invention; Fig 3 shows the top view FIG. 4 of a conventional speaker of the present invention Sectional view [Fig. 5] Perspective view of a conventional voice coil [Explanation of symbols]
14 Voice coil bobbin 14a, 14b Bobbin sheet 15 Reinforcement paper 16 Voice coil a Linear part b Arc part

Claims (3)

A voice that forms a slender track shape consisting of a straight bobbin sheet consisting of a straight part and a circular arc part formed by curling at both ends thereof, provided with a slit , and at least the abutted part joined by a reinforcing paper Coil bobbin. The voice coil bobbin according to claim 1, wherein a pair of bobbin sheets that have been processed and stabilized in shape are used. A magnetic circuit having a magnetic gap, a frame mounted on the magnetic circuit, an outer periphery is coupled to the frame, an inner periphery is fitted to the magnetic gap, and a voice coil is wound. speaker is composed of a section 2 Symbol mounting diaphragm coupled to the voice coil bobbin.

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