JP2005197998A - Drive element of diaphragm for speaker, and speaker using the drive element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drive element of a diaphragm for a speaker in which a vibration amount of the diaphragm can be increased with respect to an operation amount of a voice coil without increasing a thickness in the radiating direction of a sound, and to provide the speaker using that drive element. <P>SOLUTION: The speaker 11 comprises an arcuate main drive element 10 made of a resilient material, a drive section X including a magnetic circuit 16 composed of a yoke, a magnet and a plate, and a voice coil 18 and a damper 17 arranged on the periphery of the magnetic circuit 16, a frame 20 attached with the drive section X, and a diaphragm 21 secured to the frame 20 wherein the main drive element 10 is coupled, with a bobbin 19 and secured, at one end thereof and on the upper surface at the central part thereof, the central part of the vibration cone 21 is fixed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a speaker diaphragm driving body used in various acoustic devices and a speaker using the driving body, and more specifically, without increasing the thickness in the sound radiation direction, The present invention relates to a speaker diaphragm driving body capable of increasing the vibration amount of the diaphragm with respect to the operation amount of the voice coil, and a speaker using the driving body.

  As shown in FIG. 5, the conventional speaker 1 includes a magnetic circuit 5 including a yoke 2 having a pole at the center of the upper surface, a magnet 3 and a plate 4, a voice coil 6 provided around the magnetic circuit 5, and a diaphragm 7. The vibration system comprising the damper 8 and the frame 9 fixed to the magnetic circuit 5 are assembled so as to be stacked from the magnetic circuit 5 to the cone paper as the diaphragm 7, and the sound radiation direction Is the same as the driving direction of the voice coil 6, and the diaphragm 7 is directly driven by the voice coil 6.

  Therefore, while eliminating the need for a fixed structure in which the drive unit and the diaphragm are close to each other, the signal transmission path leading to sound generation is made less susceptible to external impact, and the degree of freedom in structure and installation is reduced. Japanese Laid-Open Patent Publication No. 2000-350285 (Patent Document 1) proposes a speaker that can be improved and that can ensure a more appropriate sound generation operation and can be applied to various uses.

  The speaker described in Patent Document 1 includes a diaphragm, a driving unit that generates a force corresponding to the sound to be generated, and the diaphragm that supports the diaphragm in a state having an internal stress and a force generated by the driving unit. And a support transmission means for transmitting the wave generated by the vibration plate to the diaphragm, specifically, the paper is elastically deformed in a state where there is an internal stress and is supported at two points by the tip of the support member and the sandwiching portion, One end of the support column is connected and connected to the sandwiching portion, and the other end is connected to a predetermined portion of the speaker drive unit in the drive unit box.

And in the said predetermined part, the disk which receives the force by a voice coil is provided in the state which suppressed the vibration, an electric signal is supplied to a voice coil, the force with respect to a disk is generated, and the wave by that is supported Then, it is transmitted to the paper through the sandwiching portion and the support member, and is converted into mechanical vibration by the paper to emit sound.
JP 2000-350285 A (Claims, FIG. 1)

  The speaker described in Patent Document 1 supports the diaphragm in a state having an internal stress, and transmits “waves” generated by the force generated by the driving unit to the diaphragm. Sound is transmitted in the form of waves and converted to mechanical vibration by the diaphragm, so the drive unit and diaphragm need not be close to each other, and can be configured in a free form. The effect that the degree of freedom of structure and installation can be improved is obtained.

  However, since the drive unit and the diaphragm are connected by a support column, it is necessary to design the speaker in consideration of the weight of the drive unit, and the speaker can be downsized and / or thinned. There are various problems to be solved.

  That is, the speaker described in Patent Document 1 transmits a wave from a disk joined to a voice coil to a narrow portion via a thin support column, and elastically deforms between the tip of the support column and the narrow portion. This is a phenomenon like so-called resonance because the paper (diaphragm) that has been fixed is vibrated. Therefore, in order to vibrate the diaphragm reliably, the size corresponding to the size of the diaphragm is large. A drive source is required, and it is very difficult to reduce the size and / or thickness of the speaker.

  Moreover, in the speaker described in Patent Document 1, it is essential to elastically deform paper (diaphragm), and if the internal stress is small, the effect as a diaphragm can be exhibited. First, if the internal stress is increased to increase the effect as a diaphragm, the strength of the support column supporting the paper (diaphragm) is increased, and the paper (diaphragm) is prevented from returning to the state without the internal stress. The necessity arises, and as the internal stress is increased, the shape of the paper (vibrating plate) and the support column approaches the fixed state, and there is a problem that the vibration becomes impossible.

  On the other hand, in recent years, there has been a demand for speakers, and it has been required to increase the vibration amount of the diaphragm with respect to the operation amount of the voice coil without increasing the thickness in the sound radiation direction. For example, since the vibration amount of the diaphragm with respect to the movement amount of the voice coil is the same, in order to increase the vibration amount of the diaphragm, the magnetic circuit and the vibration system must be enlarged to increase the movement amount of the voice coil. As a result, since the sound radiation direction is the same as the voice coil drive direction, the thickness of the loudspeaker in the radiation direction is increased, making it extremely difficult to satisfy the requirements.

SUMMARY OF THE INVENTION In view of the present situation, the present invention is to provide a speaker diaphragm driving body and a speaker using the driving body that can increase the vibration amount of the diaphragm without increasing the thickness in the sound radiation direction. It is.

In order to achieve the above object, a speaker diaphragm driver according to claim 1 of the present invention is provided.
It consists of a bow-shaped drive subject,
At least one end is used as a connecting portion with a bobbin of a voice coil.

According to a second aspect of the present invention, there is provided a speaker diaphragm driver.
An arcuate driving body,
A magnetic circuit comprising a yoke, a magnet and a plate;
Consisting of a bobbin of a voice coil held in the magnetic gap of the magnetic circuit,
One end of the driving main body and the bobbin are connected to each other.

The invention according to claim 3 of the present invention is
In the driver for a speaker diaphragm according to claim 1 or 2,
The driving subject is:
It has a strip shape or a rod shape and is made of an elastic material.

The invention according to claim 4 of the present invention is
In the driver for a speaker diaphragm according to any one of claims 1 to 3,
The driving subject is:
The other end not connected to the bobbin is fixed to a portion of the speaker frame facing the bobbin.

The invention according to claim 5 of the present invention is
In the driver for a speaker diaphragm according to any one of claims 1 to 3,
The driving subject is:
The other end not connected to the bobbin is connected to a bobbin of a voice coil of another magnetic circuit fixed to a portion of the speaker frame facing the bobbin.

Furthermore, the invention according to claim 6 of the present invention is
A magnetic circuit composed of a yoke, a magnet, and a plate, and a voice coil and a drive unit composed of a damper disposed around the magnetic circuit;
A frame to which the drive unit is attached;
A diaphragm fixed to the frame;
It consists of a bow-shaped drive body made of elastic material,
The speaker is characterized in that one end of the driving main body and the bobbin are connected, and the central portion of the diaphragm is fixed to the upper surface of the central portion of the driving main body.

The invention according to claim 7 of the present invention provides
The speaker according to claim 6, wherein
The driving subject is:
The voice coil bobbin which constitutes the drive unit is arranged on the side wall opposite to one end of the frame in the diametrical direction so that the bobbin of the voice coil protrudes into the side wall, and the bobbin of the voice coil and one end are connected. In addition, the other end is attached to the side wall of the frame facing the drive unit.

The invention according to claim 8 of the present invention provides
The speaker according to claim 7, wherein
The driving subject is:
One end is attached to the bobbin of the voice coil via a free joint, and the other end is attached to a side wall of the frame via a free joint.

The invention according to claim 9 of the present invention provides
The speaker according to claim 6, wherein
The driving subject is:
Each of the voice coils is arranged in a diametrical direction in the frame, and a driving part is arranged on each side wall of the frame facing each end so that a bobbin of a voice coil constituting each driving part protrudes into the side wall. Each of the end portions is connected to a bobbin.

The invention according to claim 10 of the present invention provides
The speaker according to claim 9, wherein
The drive main body is characterized in that each end portion is connected to a bobbin of the voice coil through a free joint.

The invention according to claim 11 of the present invention provides
The speaker according to claim 6 or 9,
The diaphragm is
It is driven by a plurality of driving main bodies, and at least one end of each driving main body is connected to a bobbin of a voice coil of a driving unit disposed on the frame.

The invention according to claim 12 of the present invention provides
The speaker according to any one of claims 6 to 11,
The drive main body and the diaphragm are
It is connected and fixed by caulking.

  The speaker diaphragm driving body according to the present invention has an elastic material formed in an arcuate shape and in the shape of a band or a rod. At least one end is connected to a bobbin of a voice coil, and the other end is fixed or another voice coil. By connecting to the bobbin, the drive main body can be easily and easily deformed in an arc shape by the vibration of the voice coil. By fixing the central part of the diaphragm to the center of the drive main body, the vibration of the voice coil It is possible to obtain a speaker having a structure in which the direction and the vibration direction of the diaphragm differ by about 90 degrees.

  In particular, in the present invention, when the driving body is made of an elastic material and has a bow shape that draws a gentle arc as a whole, when a pressing force is applied in the axial direction from one end of the driving body, the driving body is small. Since the central portion can be vibrated greatly by force, when applied to a speaker, the vibration amount of the diaphragm relative to the movement amount of the voice coil can be increased.

  Further, in the speaker of the present invention, the diaphragm is driven by an arcuate driving body whose one end is fixed to the voice coil bobbin, so that the vibration direction of the voice coil and the vibration direction of the diaphragm are approximately 90 degrees. Different structures can be used, and thereby the vibration amount of the diaphragm relative to the movement amount of the voice coil can be increased without increasing the thickness of the speaker in the sound emission direction.

  In particular, the speaker of the present invention can use a magnetic circuit that is smaller than a conventional speaker, can be reduced in weight, and the diaphragm can be of the shape and size of a conventional speaker. Sound quality that is the same as that of conventional speakers can be obtained, and a small, lightweight magnetic circuit can be used, thereby reducing the cost of the magnetic circuit.

In addition, when a diaphragm and a driving main body or a voice coil bobbin and a driving main body are joined, a vibration is caused to linearly vibrate even when the vibration is large, resulting in sound distortion. There are effects such as reduction of rolling.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a speaker diaphragm driving body according to the present invention and a speaker using the driving body will be described in detail. FIG. 1 shows an example of a speaker diaphragm driving body according to the present invention. FIG. 2 is a perspective view showing another example of the driver, FIG. 3 is a schematic explanatory view showing an example of a speaker according to the present invention, FIG. 4 is a schematic explanatory view showing another example of the speaker, and FIG. These are explanatory drawings of a conventional speaker.

  In the present invention, an elastic material is formed into a bow shape to form a speaker diaphragm driving body, and at least one end of the driving body is disposed around a magnetic circuit including a yoke, a magnet and a plate, and the periphery of the magnetic circuit. The driving unit composed of a voice coil and a damper is connected to the bobbin of the voice coil to form a driving body, and the driving body is used to configure various speakers. Various changes can be made within the range that does not change, and the invention is not limited only to the embodiments described later.

  The speaker driving body 10 of the present invention is rich in flexibility by combining a single material having spring properties such as a metal material such as phosphor bronze and stainless steel, and a plastic material such as polypropylene and polyacetal. The driving main body 10 is formed in a shape, that is, an arcuate shape when viewed from the side (note that the driving main body 10 is flexible since it is substantially the same as the driving body of the speaker diaphragm). 1, the whole may be a strip shape as shown in FIG. 1 or the whole may be a rod shape as shown in FIG. 2. Are the same.

  The drive body 10 has at least one end 10a of a drive body 10 formed in an arcuate shape connected to the top of a bobbin of a voice coil fixed to the frame, and the other end 10b fixed to the side wall of the frame. The oscillating plate is deformed in accordance with the driving direction of the bobbin that is driven by the input of the audio signal, and the diaphragm provided at the center of the arcuate portion of the driving body 10 is vibrated in the vertical direction. By adopting 10, it is possible to obtain a speaker having a structure in which the vibration direction of the voice coil and the vibration direction of the diaphragm are different by about 90 degrees.

Hereinafter, an example of a speaker using the driving body 10 having such a configuration will be described in detail.

  A speaker 11 shown in FIG. 3 includes a driving body 10, a yoke 13 having a pole 12, a ring-shaped magnet 14 disposed and fixed on the yoke 13, and a ring-shaped magnet disposed and fixed on the magnet 14. A magnetic circuit 16 comprising a plate 15, a voice coil 18 held by a damper 17 in a magnetic gap formed in the magnetic circuit 16, a bobbin 19 wound around the voice coil 18, and the magnetic circuit 16 are mounted. And a diaphragm 21 fixed to the drive main body 10.

  In the present invention, among the components constituting the speaker 11, the magnetic circuit 16, the bobbin 19 wound around the voice coil 18 disposed around the magnetic circuit 16, and the bobbin 19 are held at predetermined positions. The damper 17 is referred to as a drive unit X together.

  In the speaker 11, the frame 20 is composed of a main frame 20a whose side wall extends vertically upward, and an enlarged subframe 20b connected to the upper end of the main frame 20a. The upper surface of the plate 15 of the magnetic circuit 16 is brought into contact with the wall, and the both are integrally fixed with an adhesive or the like.

  At this time, since the upper outer peripheral wall is formed with a through hole having substantially the same diameter as the inner diameter of the plate 15 of the magnetic circuit 16, the magnetic circuit 16 is fixed to the outside of the side wall, and then the inner side of the main frame 20a. The bobbin 19 wound with the voice coil 18 is inserted into the magnetic gap, and the voice coil 18 is held in the magnetic gap by the damper 17.

  Therefore, in the embodiment shown in FIG. 3, the bobbin 19 is kept parallel to the bottom surface 20 c of the frame 20.

  In this state, the driving main body 10 is arranged in the diameter direction of the frame 20, one end thereof is connected and fixed to the bobbin 19 of the voice coil 18, and the other end is connected to the inner peripheral wall of the main frame 20 a facing the bobbin 19. Then, the center portion of the diaphragm 21 is fixed to the center of the upper surface of the driving main body 10, and the outer peripheral portion of the diaphragm 21 is bonded and fixed to the upper end portion of the subframe 22b to form the speaker 11.

  Therefore, when an electric signal is input from the input terminal to the voice coil 18 through the tinsel wire (not shown), the bobbin 19 is operated in the center direction of the frame 20 by driving the voice coil 18, and the base end portion of the bobbin 19 is At the same time, the fixed driving main body 10 is also pressed in the direction of the side wall facing the side wall on which the magnetic circuit 16 is mounted, but the other end of the driving main body 10 is fixed to the side wall of the frame 20, so The diaphragm 20 substantially moves up and down in the center of the frame 20 to drive the diaphragm 21 in the vertical direction, and sound is emitted from the diaphragm 21.

  The means for fixing the drive main body 10 and the voice coil 18 to the bobbin 19 and the inner peripheral wall of the frame 20 are not particularly limited as long as they are securely coupled together. When the arcuate driving main body 10 is deformed to some extent with respect to the driving force of the voice coil 18, the shape of the driving main body 10 follows while being bent like a statistical distribution curve, and the bobbin 19 and the driving main body Although the angle change between the end portion 10 and the connecting portion is small, as the strength of the drive main body 10 increases, the drive main body 10 applies a strong force to the driving direction of the voice coil 18, so this force Cause distortion.

  Therefore, in order to suppress the above-mentioned force, joints 22 are attached to the connecting portion between the driving main body 10 and the bobbin 19 and the connecting portion between the driving main body 10 and the inner peripheral wall of the frame 20, respectively. It is necessary to make it. Note that the use of the joint 22 is also effective in increasing the strength of the driving body 10 when the input increases and the number of amplitudes also increases.

  In addition, the joint 22 can be used as a connecting portion between the driving main body 10 and the diaphragm 21 to change the angle of the connecting portion between them. With this configuration, the diaphragm 21 can be connected to the voice coil 18. It moves linearly in the direction of 90 degrees with respect to the operation direction, and is extremely effective when the drive amount is large.

  Even when the joint 22 is not used, if the amount of amplitude is small, the arc-shaped movement is close to a linear movement.

  Further, in the present invention, the center portion of the diaphragm 21 can be used by being fixed to the center of the upper surface of the drive main body 10 having an arcuate shape, so that the center of the conical diaphragm main body as in the conventional diaphragm is used. Since it is not necessary to horizontally cut the vicinity of the part to make a truncated cone shape, it is possible to easily manufacture the diaphragm and to reduce the cost.

Further, in the embodiment shown in FIG. 3, the arcuate driving body 10 is arranged with the arcuate top portion facing upward, but the arcuate top portion is disposed below, and the concave portion is formed at the center of the upper surface of the concave portion. The center part of the diaphragm 21 may be fixed.

FIG. 4 shows an example of another speaker using the driving body of the present invention. The speaker 11 in the first embodiment drives the driving main body 10 with one driving unit X, whereas two driving units. in X and a driving unit X ₁ is intended to drive the drive main body 10. In addition, the same site | part as Example 1 is displayed with the same code | symbol.

That is, the driving unit X and the driving unit X ₁ are both of the same size, in which the driving unit X ₁ on the side wall of the mounting portion opposite to the main frame 20a of the driving unit X is provided in the first embodiment.

The drive unit _{X 1} is, with the drive member 10a as shown, the yoke 13a having a center pole 12a on the upper center portion, a magnetic circuit 16a consisting of a ring-shaped magnet 14a and a ring-shaped plate 15a, the magnetic A voice coil 18a held by a damper 17a in a magnetic gap formed in the circuit 16a and a bobbin 19a wound around the voice coil 18a are configured.

Then, on top of the bobbin 19,19a of the driving unit X ₁ and the driving unit X in the relative position, each end of the drive main body 10 via a joint 22, each fixedly connected, of the vibration plate 21 on the upper central portion The speaker 31 is formed by fixing the central portion.

Speaker 31 having such a configuration, when an electrical signal is inputted to the voice coil 18,18a provided in the driver unit _{X 1} and the driving unit X, the bobbin 19 is drawing on the right side of the driving unit X, the driver _{X 1} bobbin 19a There motion to the left, closer distance of the top of each other of the bobbin 19 and 19a, also, the bobbin 19 of the driving unit X is moved in the drawing on the left, the bobbin 19a of the driving unit X ₁ moves to the right, another bobbin 19 And the distance at the top of 19a will be increased.

  Therefore, by operating the voice coil in this way, the driving main body 10 can be operated in a direction different by about 90 degrees with respect to the left and right operation direction of the bobbin, that is, in the vertical direction, and thus the diaphragm 21 is driven. is there.

  Since the speaker 31 of this system applies a pressing force in the opposite direction to each of the driving main bodies 10, the driving main body 10 is driven by ½ power compared to the system of the first embodiment. Therefore, if the magnetic circuit is the same, the magnetic circuit is doubled as compared with the one time and the diaphragm 21 can be operated more stably. It is something that can be done.

In Example 2, two driving unit X, has been arranged X ₁ to a position facing the main frame 20a, for example, the driving unit X, 3 one at an angle of 120 degrees, or 90 degrees of angle It is also possible to increase the operating force by installing four diaphragms at equal intervals and vibrating one diaphragm 21 by a plurality of driving bodies 10, 10,.

As described above, the speaker diaphragm driving body according to the present invention comprises an elastic material in the shape of a bow to constitute a driving body, and at least one end of the driving body is oscillated in conjunction with a voice coil. Since the speaker is driven by using this speaker diaphragm driving body, the vibration amount of the diaphragm can be increased without increasing the thickness in the sound radiation direction. Further, there is an advantage that the size and thickness can be reduced by appropriately selecting the size of the driving body and the material and size of the diaphragm to be used.

It is a perspective view which shows an example of the drive body of the diaphragm for speakers concerning this invention. It is a perspective view which shows the other example of the same drive body. It is a schematic explanatory drawing which shows an example of the speaker concerning this invention. It is a schematic explanatory drawing which shows the other example of the speaker concerning this invention. It is a schematic explanatory drawing of the conventional speaker.

Explanation of symbols

10 Driving body (main driving body)
11 Speaker 13 Yoke 14 Magnet 15 Plate 16 Magnetic Circuit 17 Damper 18 Voice Coil 19 Bobbin 20 Frame 21 Diaphragm X Drive Unit

Claims (12)

It consists of a bow-shaped drive subject,
At least one end is used as a connection part with the bobbin of a voice coil, The drive body of the speaker diaphragm characterized by the above-mentioned. An arcuate driving body,
A magnetic circuit comprising a yoke, a magnet and a plate;
Consisting of a bobbin of a voice coil held in the magnetic gap of the magnetic circuit,
A driving body for a speaker diaphragm, wherein one end of the driving main body and the bobbin are connected to each other. The driving subject is:
The speaker diaphragm driving body according to claim 1, wherein the speaker diaphragm driving body is formed of an elastic material. The driving subject is:
4. The speaker diaphragm driving body according to claim 1, wherein the other end not connected to the bobbin is fixed to a portion of the speaker frame facing the bobbin. The driving subject is:
The other end that is not connected to the bobbin is connected to a bobbin of a voice coil of another magnetic circuit fixed to a portion of the speaker frame facing the bobbin. The driving body of the diaphragm for a speaker described in 1. A magnetic circuit composed of a yoke, a magnet, and a plate, and a voice coil and a drive unit composed of a damper disposed around the magnetic circuit;
A frame to which the drive unit is attached;
A diaphragm fixed to the frame;
It consists of a bow-shaped drive body made of elastic material,
A speaker characterized in that one end of the driving main body and the bobbin are connected, and a central portion of the diaphragm is fixed to an upper surface of a central portion of the driving main body. The driving subject is:
The voice coil bobbin which constitutes the drive unit is arranged on the side wall opposite to one end of the frame in the diametrical direction so that the bobbin of the voice coil protrudes into the side wall, and the bobbin of the voice coil and one end are connected. The speaker according to claim 6, wherein the other end is attached to a side wall of the frame facing the drive unit. The driving subject is:
The speaker according to claim 7, wherein one end is attached to a bobbin of the voice coil via a free joint, and the other end is attached to a side wall of the frame via a free joint. The driving subject is:
Each of the voice coils is arranged in a diametrical direction in the frame, and a driving part is arranged on each side wall of the frame facing each end so that a bobbin of a voice coil constituting each driving part protrudes into the side wall. The speaker according to claim 6, wherein the end portions are connected to a bobbin. The driving subject is:
The speaker according to claim 9, wherein each end is connected to a bobbin of the voice coil through a free joint. The diaphragm is
10. Driven by a plurality of driving main bodies, wherein at least one end of each driving main body is connected to a bobbin of a voice coil of a driving unit disposed on the frame. The speaker according to 1. The drive main body and the diaphragm are
The speaker according to any one of claims 6 to 11, wherein the speaker is connected and fixed by caulking.

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