JP2004336224A - Draw-out processing method of voice coil lead wire of small-sized speaker and small-sized speaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a draw-out processing method of a voice coil lead wire of a small-sized speaker for facilitating the draw-out processing of the voice coil lead wire and enhancing resistance to an input without ununiformizing the weight balance and the rigidity or the like of a diaphragm while preventing the occurrence of an abnormity sound of the diaphragm and to provide the small-sized speaker. <P>SOLUTION: A window 7d for drawing out the lead wire is formed to a frame 7 so as to facilitate the lead wire from being drawn out. Further, a rib 11 is provided in the vicinity of the window 7d for tentatively fixing the voice coil lead wire 5a while positioning the drawn-out voice coil lead wire 5a in order to facilitate the work of forming a curve with a sufficient length with respect to the swing amplitude of the voice coil lead wire 5a. Moreover, a frame cover 12 being a separate component from the frame 7 is provided on the rear side of the window 7d in order to damp the motion of the voice coil lead wire 5a. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a small loudspeaker, and more particularly to a method for extracting a voice coil lead wire of a small loudspeaker used in a mobile phone, a notebook personal computer, or the like, and a small loudspeaker.
[0002]
[Prior art]
Generally, a voice coil wire used for a small speaker is extremely thin. Therefore, when an audio signal is input to the speaker, the voice coil lead wire is repeatedly bent and driven to be disconnected due to the driving of the voice coil.
[0003]
The voice coil lead wire is pulled out from the voice coil to the outside, and various processing methods have been proposed.
[0004]
FIG. 3 is a plan view of a process of extracting a voice coil lead wire of a conventional speaker (hereinafter, referred to as Conventional Example 1), and the voice coil lead wire 21a of the voice coil 21 is moved along the shape of the diaphragm 20. After that, an adhesive is applied to the lead wire forming part a and the lead wire lead-out part b to protect the voice coil lead wire 21a and fix it to the diaphragm 20.
[0005]
In the first conventional example, the voice coil 21 is driven to transmit vibration to the voice coil lead wire 21a, and the lead wire forming part a bends the voice coil lead wire 21a with the amplitude of the diaphragm 20, but the diaphragm Since it is integrated with 20, the degree of bending fatigue due to amplitude is reduced, so that disconnection of the voice coil lead wire 21a can be prevented.
[0006]
Further, as another conventional example, as shown in FIGS. 4A and 4B, the voice coil lead wire 21a of the voice coil 21 is pulled out to the outside in a state in which the voice coil lead wire 21a does not crawl on the diaphragm 20 and is fixed. There is a method (hereinafter referred to as Conventional Example 2).
[0007]
In the second conventional example, the weight balance and rigidity balance of the diaphragm 20 can be maintained, the rolling phenomenon due to the split resonance of the diaphragm 20 is less likely to occur, and the abnormal resonance of the diaphragm 20 is less likely to occur. Similarly, when a large input is input to the speaker, the rolling phenomenon and the abnormal resonance hardly occur, which leads to an increase in input resistance.
[0008]
[Problems to be solved by the invention]
However, in the conventional example 1, the weight of the voice coil lead wire 21a of the lead wire forming part a formed on the diaphragm 20 and the adhesive b protecting the voice coil lead wire 21a are increased by the weight. Since the weight balance of No. 20 becomes uneven, the rolling phenomenon is likely to occur. Further, since the rigidity balance of the diaphragm 20 becomes non-uniform, abnormal resonance due to split resonance of the diaphragm 20 is likely to occur, and there is a problem that distortion of the speaker itself increases.
[0009]
When the speaker is used with a large input, the driving force applied to the voice coil 21 increases and the amplitude of the diaphragm 20 increases. In this case, abnormal resonance is likely to occur and abnormal sound is likely to be emitted. In addition, there is also a problem that the possibility that the voice coil lead wire 21a is disconnected increases due to an increase in bending fatigue of the diaphragm 20.
[0010]
In the second conventional example, resonance is likely to occur in the voice coil lead wire 21a itself due to vibration transmitted when the voice coil 21 is driven, and at that time, the voice coil lead wire 21a may hit the yoke frame. Also, if a very thin voice coil wire is used, there is a high possibility of bending and disconnection, so it is necessary to change to a slightly thicker voice coil wire (such as a kinshi wire). In addition, when considering the work surface of this method, there is a problem that it is difficult to form a curved line of the voice coil lead wire 21a stably in space.
[0011]
The present invention has been proposed in view of the above, and the object thereof is to prevent the weight balance, rigidity, etc. of the diaphragm from becoming non-uniform, and also to prevent abnormal sound of the diaphragm, and An object of the present invention is to provide a voice coil lead wire extraction method for a small speaker which facilitates the extraction process of the voice coil lead wire and has improved input resistance, and a small speaker thereof.
[0012]
[Means for Solving the Problems]
According to the present invention, in order to achieve the above object, a voice coil lead wire 5a of a voice coil 5 provided in a frame 7 is formed in a space in the frame 7 with a curved line having a length sufficient for amplitude. And, it is pulled out to the back side from the lead wire draw-out window 7d formed in the main body 7a of the frame 7 and positioned through the positioning rib 11 provided on the back face, and the lead wire draw-out window 7d is It is configured to be covered by a frame cover 12 provided on the back side.
[0013]
Also, in the small speaker, a voice coil lead wire 5a of the voice coil 5 is provided on a main body 7a of a frame 7 in which a magnetic circuit, a diaphragm 6 and a voice coil 5 are disposed. A curve is formed with a length sufficient for the amplitude, and a lead wire lead-out window 7d for drawing out the voice coil lead wire 5a to the back is formed. The window 7d is drawn to the back side of the main body 7a in the vicinity of the window 7d. A rib 11 for positioning and supporting the voice coil lead wire 5a is formed, and a frame cover 12 is provided on the back side of the window 7d.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described with reference to the drawings.
[0015]
【Example】
1A is a perspective view of one embodiment of a small speaker according to the present invention, FIG. 1B is an enlarged perspective view of a main part thereof, and FIG. 2 is a schematic longitudinal sectional view of an assembled state of one embodiment of the present invention. .
[0016]
In these figures, reference numeral 1 denotes a yoke having a peripheral wall 1a. As is well known, a disk-shaped magnet 2 is provided inside, and a plate (not shown) is provided at a tip end of the magnet 2, and an outer periphery of the plate is provided. A magnetic gap 3 is formed between the surface and the opposing surface of the peripheral wall 1 a of the yoke 1, and the voice coil 5 wound around the outer periphery of the voice coil bobbin 4 is located in the magnetic gap 3.
[0017]
The voice coil bobbin 4 having the voice coil 5 is coupled to a central portion of a diaphragm 6 made of resin, the outer peripheral portion of the diaphragm 6 is coupled to the inside of the outer end of the frame 7, and the voice coil 5 is disposed between the magnetic gaps 3. It is arranged to be able to vibrate.
[0018]
The frame 7 is composed of a substantially ring-shaped dish-shaped main body 7a and a peripheral wall 7b rising at the outer peripheral portion thereof. The outer peripheral portion of the diaphragm 6 is provided inside the outer end of the peripheral wall 7b via a support member 8. Are combined.
[0019]
Further, the yoke 1 is incorporated into a circular opening formed at the center of the main body 7a of the frame 7.
[0020]
In addition, for example, an arc-shaped ventilation window 7c is formed in the main body 7a of the frame 7. In addition, a pair of windows 7d for leading out the voice coil lead wire 5a at the beginning and end of the winding of the voice coil 5 to the back side of the frame 7 are formed in the main body 7a at a distance.
[0021]
A concave terminal mounting portion 9 is formed between the pair of lead wire extraction windows 7d, and a pair of terminal portions 10 made of a conductive member are arranged on the terminal mounting portion 9 so as to be insulated from each other with a gap therebetween. ing. A notch 10a for positioning is formed at the center of the outside of each of the terminal portions 10, and is positioned at a predetermined position on the back surface of the main body 7a while being aligned with the protrusions 7e projecting from the outer peripheral portion of the back surface of the main body 7a. Each terminal section 10 is attached.
[0022]
Further, a lead wire positioning rib 11 is provided between the terminal mounting portion 9 and each lead wire drawing window 7d. These ribs 11 protrude in the radial direction of the main body 7a. At substantially the center of the rib 11, the voice coil lead wire 5a is guided to the terminal portion 10 side, and the voice coil lead wire 5a is positioned. A positioning / supporting groove 11a for pinching and supporting is formed.
[0023]
The frame cover 12 can be attached to the lead wire lead-out window 7d from the back side of the main body 7a by an adhesive. The frame cover 12 is provided in the vicinity of the rib 11 and has a size and shape sufficient to close the window 7d for drawing out a lead wire, and is formed of, for example, a resin molded product.
[0024]
This frame cover 12, which is made of a separate component from the main body 7a, is pulled out from the lead wire lead-out window 7d, and is used to brake the movement of the voice coil lead wire 5a inserted and supported in the positioning and supporting groove 11a. It is provided in.
[0025]
Next, an example of assembling the small speaker of the present invention will be described.
[0026]
A magnet 2 and a plate are sequentially incorporated in the yoke 1 to form a magnetic circuit.
[0027]
The frame 7 is attached to the outer end of the peripheral wall 1a of the yoke 1 via an adhesive.
[0028]
On the other hand, the diaphragm 6 and the voice coil bobbin 4 having the voice coil 5 are bonded and integrated, and the voice coil 5 is disposed at a predetermined position of the magnetic gap 3, and the outer peripheral portion of the diaphragm 6 is attached to the frame 7.
[0029]
The voice coil lead wire 5a is gripped by a jig from the back side of the frame 7 main body 7a through a window 7d for leading out the lead wire and formed in a space portion, that is, a curve is formed with a sufficient length for the amplitude, The voice coil lead wire 5a is pulled out to the outside via the groove 11a for positioning and supporting the lead wire positioning rib 11, and is connected to the terminal portion 10 by soldering.
[0030]
In the above operation, since the voice coil lead wire 5a is supported in the positioning and supporting groove 11a, the forming operation can be easily performed, and the soldering operation can be easily and quickly performed.
[0031]
Next, in order to brake the voice coil lead wire 5a formed in the space, the frame cover 12 is attached near the lead wire drawing window 7d and the rib 11.
[0032]
That is, when the input applied to the voice coil 5 is large, since the amplitude of the diaphragm 6 is large, there is a possibility that the voice coil lead wire 5a hits surrounding components such as the yoke 1 and the frame 7 and an abnormal sound is generated. To prevent this, a frame cover 12 is attached to brake the amplitude of the diaphragm 6 and the movement of the voice coil lead wire 5a. At this time, since the frame cover 12 is attached to the rear side of the frame, the inner surface of the frame cover 12 is located outside the inner surface of the frame 7 and does not contact the voice coil lead wire 5a.
[0033]
【The invention's effect】
As described above, according to the present invention, the voice coil lead 5a is formed and drawn out to the rear side from the lead wire drawing window 7d formed in the frame 7, and the voice coil lead 5a is Since the foam is formed by floating from above, it is possible to prevent the balance of the weight and rigidity of the diaphragm 6 from being uneven, to prevent the occurrence of abnormal noise without contacting the yoke 1, the frame 7 and the like, and to lead out the lead wire. Forming work and work such as drawing out to the outside via 7d can be easily performed from the rear side.
[0034]
In addition, since the voice coil lead wire 5a pulled out to the back side from the lead wire drawing window 7d is positioned and supported by the positioning ribs 11 provided on the back side, it is soldered. It can be done easily, quickly and reliably.
[0035]
In addition, a frame cover 12 separate from the frame 7 is provided in the lead wire lead-out window 7d, and the frame cover 12 is provided on the back side of the frame 7 so that the inner surface thereof does not contact the formed voice coil lead wire 5a. As a result, the input resistance is improved, and the occurrence of abnormal noise can be prevented.
[Brief description of the drawings]
FIG. 1A is a perspective view of a small speaker according to an embodiment of the present invention as viewed from the rear side, and FIG. 1B is an enlarged perspective view of a main part.
FIG. 2 is a schematic longitudinal sectional view showing an assembled state of one embodiment of the present invention.
FIG. 3 shows a plan view of one conventional example.
FIG. 4A is a perspective view of another conventional example viewed from the rear side, and FIG. 4B is a schematic longitudinal sectional view thereof.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Yoke 1a Peripheral wall 2 Magnet 3 Magnetic gap 4 Voice coil bobbin 5 Voice coil 5a Voice coil lead wire 6 Vibrating plate 7 Frame 7a Main body 7b Peripheral wall portion 7c Ventilation window 7d Lead extraction window 7e Projection 8 Support member 9 Terminal Mounting part 10 Terminal part 10a Notch 11 Rib 11a for positioning lead wire Groove 12 for positioning and support 12 Frame cover

Claims (2)

The voice coil lead wire (5a) of the voice coil (5) provided in the frame (7) is formed into a curve having a sufficient length with respect to the amplitude in a spatial portion in the frame (7), and the frame ( 7) The lead wire withdrawal window (7d) formed in the main body (7a) is pulled out to the back side, and is positioned via a positioning rib (11) provided on the back surface. A method for drawing out a voice coil lead wire of a small speaker, comprising covering with a frame cover (12) provided on the back side of the main body (7a). Inside the main body (7a) of the frame (7) in which the magnetic circuit, the diaphragm (6) and the voice coil (5) are arranged, the voice of the voice coil (5) is provided in the space of the main body (7a). The coil lead wire (5a) is formed into a curve having a sufficient length with respect to the amplitude, and a window (7d) for leading the voice coil lead wire (5a) to the back is formed, and the window (7d) is formed. A rib (11) for positioning and supporting the voice coil lead wire (5a) drawn out on the back side of the main body (7a), and a frame cover (12) on the back side of the window (7d). ).

Images