KR102636952B1 - Tweeter of Electro-magnetic method - Google Patents

Abstract

The present invention relates to an electromagnetic high-pitched speaker, comprising: an upper coil; a lower coil disposed opposite to the lower part of the upper coil; a diaphragm disposed between the coils; It includes one or more permanent magnets disposed outside the coils, and is provided with an open diaphragm having at least one hole or a plurality of vibrating blades in the center of the vacuum plate, so that the low sound generated from the body around the hole and the vibrating blades themselves is generated by itself. The anti-phase disappears and only high-pitched sounds are generated and emitted, which is very advantageous for expanding and fine-tuning the high-pitched sound range. It also contributes to cost reduction by deleting the high-pass filter, so it can be usefully used in industry.

Description

Electromagnetic high-pitched speaker {Tweeter of Electro-magnetic method}

The present invention relates to an electromagnetic high-pitched speaker. More specifically, the diaphragm is provided in an open form with an open hole or a plurality of vibrating blades in the center, enabling high-resolution, precise and detailed high-quality sound reproduction in a more expanded high-pitched range. It is about an electromagnetic high-pitched speaker that can achieve maximum efficiency by minimizing magnetic resistance.

In general, electro-magnetic speakers use the same principle as coin-type speakers to generate force by interacting alternating current magnetic force lines generated from a coil with a conductor wound and direct current magnetic force lines derived from a permanent magnet, but the coil Unlike the directly driven coin-type, the coil is fixed and an iron piece attached to one end of the coil is electromagnetized and vibrates to achieve electro-acoustic conversion.

Electronic-type speakers include balanced armature speakers and plate-type speakers. Among these electronic-type speakers, those related to the plate-type are described in Patent Document 1 below (Korean Patent Registration No. 1596894). It is presented.

In the electronic-type speaker of Patent Document 1, the upper coil and the lower coil are disposed in correspondence, one or more permanent magnets are disposed outside the upper and lower coils, and a diaphragm is disposed between the upper and lower coils, and the upper and lower surfaces of the diaphragm are disposed. The lower edge is provided in such a way that upper and lower damper members support it.

The process by which the diaphragm is driven in the existing electro-type speaker configured as above will be described. First, assuming that the upper surface of the permanent magnet is the S pole and the lower surface is the N pole, when the current flow is in a positive cycle, the internal magnetic field direction of the upper coil and the internal magnetic field direction of the lower coil face inward and face each other. This is done, and because of this, the diaphragm is polarized to N, so the diaphragm moves upward.

When the current flow is 0, the diaphragm is neutralized and the diaphragm itself is positioned in the center by balancing the upper and lower magnetic fields of the upper and lower permanent magnets and the restoring force of the diaphragm itself.

When the current flow is in a negative (-) cycle, the internal magnetic field direction of the upper coil and the internal magnetic field direction of the lower coil face each other outward, and the diaphragm becomes S-polarized, so the diaphragm moves in the downward direction.

The electro-type speaker as described above realizes rapid response to electrical signals by driving the diaphragm electromagnetized by the electromagnetic force of the upper and lower coils and directly reacting with the magnetic force of the permanent magnet while excluding the weight of the coil. This allows for very delicate and detailed sound reproduction.

In addition, in electronic speakers, the diaphragm actively drives itself and performs sound conversion, thereby minimizing the conversion path distortion rate of the vibrating part, which is advantageous for clearer sound reproduction.

However, in the existing electronic-type speaker as described above, expansion of the treble range is limited as it is provided with a single diaphragm integrated into a plate shape such as a circle or oval, and full range is possible if it is provided with a dome- and cone-shaped diaphragm, but amorphous alloy There was a problem in that molding was difficult due to the strong elasticity, which is a characteristic of the material, and this increased manufacturing costs.

In addition, since the single integrated diaphragm on a plane is supported by the upper and lower damper members and a gap guide is provided outside it, the overall thickness becomes thicker as amplitude space is required, and the magnetoresistance increases, resulting in a decrease in efficiency. Although existing electronic speakers have good resolution, most of them have the disadvantage of being limited in the expansion of low tones and ultra-high tones.

Recently, the audio market, which is transitioning to high resolution, contains many musical elements of bass and treble and is becoming more detailed, and is pursuing high-resolution sound reproduction with an expanded dynamic range. Accordingly, bass-specific speakers are being used to reproduce high-quality sound. It is possible to systematize by combining with, and in particular, sophisticated high-resolution speakers exclusively for high-pitched sounds are desperately needed.

KR 10-1596894 B1 (registered on February 17, 2016)

The present invention was researched and developed to overcome the disadvantages of conventional speakers as described above, and is provided with an open diaphragm having at least one hole or a plurality of vibrating blades in the center of the diaphragm, which enables expansion of the high-pitched sound range and detailed control. The low sound generated from the wing itself is extinguished out of phase and only the high sound is generated and emitted. As a result, the purpose is to provide an electromagnetic high-pitched speaker that is very advantageous for expanding and fine-tuning the high-pitched sound range.

In addition, the present invention is an active ferromagnetic vibrating body that drives itself while being magnetized with an electromagnetic field that is alternately linked with the electric signal flowing in the upper and lower coils by directly contacting the open diaphragm with the upper and lower coils or upper and lower permanent magnets without any air gap. The purpose is to provide an electromagnetic high-pitched speaker that can realize ultra-high resolution in high frequency bands ranging from high to ultra-high and achieve improved efficiency.

In addition, by providing an integrated electrode member that is a flexible printed circuit board (FPCB) and a double-sided adhesive pad, it is possible to assemble at least the upper and lower coils or the upper and lower permanent magnets to the integrated electrode member using the double-sided adhesive pad, which allows for the assembly main. The purpose is to provide an electromagnetic high-pitched speaker that can minimize and simplify the process to about 10 processes and is highly suitable for assembly line automation.

The electromagnetic high-pitched speaker of the present invention for achieving the above object includes an upper coil; a lower coil disposed opposite to the lower part of the upper coil; a diaphragm disposed between the coils; It includes one or more permanent magnets disposed outside the coils, and the diaphragm is characterized as being an open diaphragm with a hole drilled in the center.

In the electromagnetic high-pitched sound speaker of the present invention, the diaphragm is characterized in that it is provided as an open diaphragm with a plurality of vibrating blades formed by cutting radially from the inner peripheral surface of the hole.

In the electromagnetic high-pitched sound speaker of the present invention, the diaphragm is characterized in that it can form an adjustment hole for each vibrating blade or selectively form an adjustment hole in some of the vibrating blades.

In the electromagnetic high-pitched speaker of the present invention, the diaphragm is made of a ferromagnetic material such as iron, nickel, or silicon.

In the electromagnetic high-pitched speaker of the present invention, the upper and lower coils are made of the same size and arranged symmetrically up and down, and the edge of the diaphragm is directly supported by the symmetrically arranged upper and lower coils. It is characterized by

In the electromagnetic high-pitched sound speaker of the present invention, the upper coil and the lower coil are connected so that their respective magnetic force lines flow opposite to each other.

In the electromagnetic high-pitched sound speaker of the present invention, the upper coil, lower coil, upper permanent magnet, lower permanent magnet, and diaphragm are installed concentrically in a housing, and a first sound radiation hole is formed in the upper center of the housing, The upper permanent magnet and the lower permanent magnet are characterized in that they have the same magnetization direction.

In the electromagnetic high-pitched loudspeaker of the present invention, the upper and lower coils are connected so that the (+) and (-) terminals of the upper and lower coils are connected in parallel through an integrated electrode member made of a flexible printed circuit board (FPCB). It is characterized by

The integrated electrode member includes an upper electrode member covering the upper surface of the upper coil, a lower electrode member covering the lower surface of the lower coil, a connecting track connecting the upper and lower electrode members to each other, and a lower electrode member forming a straight line with the connecting track. An external electrode terminal member extending from is provided integrally, two electrode terminals are provided on one side of the upper and lower electrode members, and two electrode terminals are provided at the ends of the external electrode terminal member, each of the upper and lower coils. It is characterized in that a pair of electrode patterns are formed by individually connecting lead wires to form a circuit.

The integrated electrode member is attached to the upper electrode member with a double-sided adhesive pad so that the upper coil and upper permanent magnet are concentric, and attached to the lower electrode member with a double-sided adhesive pad so that the lower coil and lower permanent magnet are concentric, and then the upper coil is attached to the integrated electrode member. A diaphragm is interposed between the and lower coils, and both ends of the connecting track are bent and molded into a diagonal shape so that the upper and lower coils as well as the diaphragm are concentric, and then inserted into the housing and assembled.

In the electromagnetic high-pitched speaker of the present invention, the housing is made of a cap-shaped member, and a first sound discharge port is formed in the center of the upper surface, a coil wire molding port is formed on one side, and an electrode extraction port is formed on the other side. It is characterized in that an electrode withdrawal incision groove is formed.

According to the electromagnetic high-pitched speaker of the present invention, the diaphragm is provided as an open diaphragm with at least one hole or a plurality of vibrating blades formed in the center, so that unnecessary low sounds can be removed and at the same time, it is very possible to expand and fine-tune the treble range. There are advantages.

In addition, the electromagnetic high-pitched speaker according to the present invention has an open diaphragm made of a very light and extremely small mass as a hole or a plurality of vibrating blades are formed in the center of the diaphragm, and this enables rapid arc movement, ranging from high range to ultra-high range. It has the advantage of being able to implement ultra-high resolution in high frequency bands.

In particular, the electromagnetic high-pitched sound speaker according to the present invention is provided in an open form with an open hole or a plurality of vibrating blades in the center of the diaphragm, thereby reducing the vibration weight and allowing the body around the hole or each vibrating blade to make a fine arc motion. It enables high-resolution, precise and detailed high-quality sound reproduction in the high-pitched range with many vibrations per second, while providing the advantage of being able to easily remove unnecessary low-pitched ranges using the reverse phase effect without a separate high-pass filter. This allows multiple speakers to be combined. Even when systemized, it has the advantage of providing a wider range of high-resolution sounds than before and at the same time being very advantageous in reducing costs.

In addition, the electromagnetic high-pitched speaker according to the present invention is very easy to change the size, shape, thickness, and elastic modulus of the vibrating blade, so it is possible to control the responsiveness of the high-pitched frequency range, thereby realizing the ultra-high resolution sound pattern desired by consumers. It has the advantage of providing an easier design and use environment.

In addition, the electromagnetic high-pitched speaker according to the present invention does not require amplitude space because the open diaphragm is directly and closely supported by the upper and lower coils or upper and lower permanent magnets without a separate damper member, and this basically reduces the number of parts. It has the advantage of reducing magnetic resistance, increasing efficiency, and making it possible to achieve a slimmer appearance.

In addition, the electromagnetic high-pitched speaker according to the present invention is assembled by attaching and integrating at least the upper and lower coils or the upper and lower permanent magnets using an integrated electrode terminal that is a flexible printed circuit board (FPCB) and a double-sided adhesive pad. As a result, it has the advantage of being very suitable for automating the assembly line while minimizing and simplifying the main assembly process to about 10 processes.

In addition, the electromagnetic type high-pitched speaker according to the present invention can be assembled with a coil induction track of an integrated electrode member so that the ends of the upper and lower coils are pulled out, and then bent and molded to one side using a roller, etc., thereby reducing the assembly line. It has the advantage of being very suitable for automation as well as productivity improvement.

Figure 1 is a cross-sectional view showing an electromagnetic high-pitched speaker according to a preferred embodiment of the present invention.
Figure 2 is a plan view of Figure 1.
Figure 3 is a bottom view of Figure 1.
Figure 4 is an enlarged view showing a portion of Figure 1.
Figure 5 is an exploded perspective view showing an electromagnetic high-pitched speaker according to a preferred embodiment of the present invention.
Figure 6 is a plan view and longitudinal cross-sectional view showing the housing applied to the electromagnetic high-pitched speaker of the present invention.
Figure 7 is a plan view and longitudinal cross-sectional view showing an excerpt of a coil according to the present invention.
Figure 8 is a plan view showing a diaphragm extracted from an electromagnetic high-pitched speaker according to the present invention.
Figure 9 is a plan view and a bottom view showing an integrated electrode member extracted from an electromagnetic high-pitched speaker according to the present invention.
Figures 10 and 11 are perspective views showing diaphragms of another embodiment of the electromagnetic high-pitched speaker according to the present invention.
Figures 12 to 19 are diagrams showing the assembly process of the electromagnetic high-pitched speaker according to the present invention.
Figure 20 is a diagram showing another embodiment of an electromagnetic high-pitched speaker according to the present invention.
Figure 21 is a graph comparing the frequency response characteristics of the electromagnetic high-pitched speaker according to the present invention with the frequency response characteristics of a conventional speaker.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawing of an electromagnetic high-pitched speaker. For reference, the sizes of components, thickness of lines, etc. shown in the drawings used to describe the present invention may be somewhat exaggerated for ease of understanding. In addition, the terms used in the description of the present invention are merely defined in consideration of the functions of the present invention and may vary depending on the user, operator intention, custom, etc. Therefore, it would be appropriate to define terms based on the overall content of this specification.

1 to 9 are diagrams showing an electromagnetic high-pitched speaker according to a preferred embodiment of the present invention.

As shown in the drawing, the electromagnetic high-pitched speaker according to the present invention includes a housing 10 with a cap-shaped cross section, an upper coil 20 mounted in the upper space inside the housing 10, and the upper coil 20. ), a lower coil 30 disposed opposite to the lower part of the coil, a diaphragm 40 disposed between the coils, and upper and lower permanent magnets 50 and 60 disposed outside the coils. . The upper and lower coils 20 and 30 form a circuit with the integrated electrode member 70 and are connected to receive current.

The housing 10 must have an installation space for the upper and lower coils 20 and 30, the diaphragm 40, the upper and lower permanent magnets 50 and 60, and the integrated electrode member 70, so that the overall shape is It is preferably made of a cap-shaped cross section and made of a non-magnetic material such as aluminum. The housing 10 has a sound discharge hole 11 formed at the center of its upper surface, a coil wire molding hole 12 formed on one side thereof, and a connecting track 73 portion of the integrated electrode member 70 on the other side. An electrode withdrawal incision groove 13 is formed for electrode withdrawal to prevent damage from exposure.

On one side of the upper coil 20, lead lines 21 such as + pole lead wires and - pole lead wires are led out, and the lead wires 21 of the upper coil 20 are the upper electrodes of the integrated electrode member 70. It is connected to the first electrode terminal 71a formed on the member 71. The upper coil 20 is assembled inside the upper permanent magnet 50 and installed in the upper space of the housing 10.

The lower coil 30 is disposed opposite to the lower part of the upper coil 20 and spaced apart by the thickness of the diaphragm 40, and is installed to be located inside the lower permanent magnet 60 in the lower space of the housing 10. .

On one side of the lower coil 30, a lead wire 31 such as a + pole lead wire, a - pole lead wire, etc. is led out, and the lead wires 31 of the lower coil 30 are the lower electrodes of the integrated electrode member 70. It is connected to the second electrode terminal 72a formed on the member 72.

As mentioned above, the upper permanent magnet 50 is disposed on the outside of the upper coil 20, and the lower permanent magnet 60 is disposed on the outside of the lower coil 30, and they are all provided as a washer type.

In addition, the upper coil 20 and lower coil 30 are connected so that their respective magnetic force lines flow opposite to each other, and the diaphragm 40, which is electromagnetized through this, receives driving force from the two upper and lower coils 20 and 30. get The diaphragm 40 vibrates up and down in response to electrical positive (+) period and negative (-) period signals applied to the upper and lower coils (20, 30).

The diaphragm 40 is installed directly between the upper and lower coils 20 and the lower coils 30, which are symmetrically disposed, without any gap, and is installed concentrically with the upper and lower coils 20 and 30. . In addition, the diaphragm 40 has a body 41 that performs the main function of vibration, an edge 42 provided on the outside of the body 41, and a closed shape at the center of the body 41. The hole 43 is drilled and is provided as an open vibration plate with a plurality of vibration blades 44 radially formed around the hole 43. The diaphragm 40 is made of a ferromagnetic material such as iron, nickel, or silicon.

This diaphragm 40 is installed directly between the upper and lower coils 20 and 30 of the same size, so no amplitude space is required, and is directly driven by the electromagnetic force of the upper coil 20 and lower coil 30. Efficiency increases as magnetic resistance decreases, and this allows for rapid response to electrical signals, enabling very detailed sound reproduction.

In particular, the open diaphragm 40 has its outer periphery supported by the upper and lower coils 20 and 30 and has the same circumference, which is the inner diameter of the upper and lower coils 20 and 30 (virtual as shown on the diaphragm in FIG. 5). Based on the line), each vibrating blade 44 vibrates while making an arc motion up and down like the imaginary line in FIG. 4. Accordingly, the low-pitched sound region generated in the vibrating blade 44 itself by the hole 43 of the diaphragm 40 and the groove between the vibrating blades 44 is self-extinguished in anti-phase, causing the vibrating blade 44 to move in an arc. Since only the high-pitched sound generated by is emitted, there is a very advantageous advantage in obtaining an electromagnetic high-pitched speaker.

The open diaphragm 40 is directly and closely supported without an air gap by the upper and lower coils 20 and 30 or the upper and lower permanent magnets 50 and 60, so that an electric signal flows through the upper and lower coils 20 and 30. It has the advantage of being an active vibrating body that drives itself while being magnetized with an electromagnetic field that is alternately linked with the electromagnetic field, making it possible to implement ultra-high resolution in high frequency bands from high to ultra-high frequencies.

The diaphragm 40 is shown with vibrating blades 44 formed radially from the central hole 43, but it can be provided with a closed circular hole 43 as shown in FIG. 10. In this case, the body 41 around the hole 43 vibrates in an upward and downward arc motion based on the same circumference, which is the inner diameter of the upper and lower coils 20 and 30. Accordingly, the low-pitched sound region generated in the body 41 of the diaphragm 40 itself by the hole 43 of the diaphragm 40 is self-extinguished in reverse phase, and the body 41 of the diaphragm 40 undergoes an arc motion. Only the high-pitched sounds generated are emitted.

The closed hole 43 may be provided in various closed shapes such as oval, square, etc. in addition to circular.

As the size and area of the hole 43 of the diaphragm 40 change, the low sound extinction area also changes. When the size and area of the hole 43 are small, the low-pitched sound extinction area is low, and as the size and area of the hole 43 increase, the low-pitched sound extinction area gradually expands into the high-pitched sound area.

The diaphragm 40 has a low-pitched sound extinction area that varies depending on the size and area of the hole 43, and at the same time, a high-pitched sound range correspondingly varies, so the size of the hole 43 and its area can be designed and changed in various ways, thereby producing high-pitched sounds. It has great advantages not only in expanding and diversifying areas but also in fine-tuning.

The upper and lower coils 20 and 30 are connected in parallel through an integrated electrode member 70 made of a flexible printed circuit board (FPCB), so that the + poles of the upper and lower coils are connected to + poles, and the - poles are -. Connect the poles together.

As shown in FIG. 9, the integrated electrode member 70 has an upper electrode member 71 and a lower electrode member 72 connected through a connection track 73 and an external electrode terminal member on one side of the lower electrode member 72. (74) extends to form a straight line with the connecting track (73).

The upper and lower electrode members 71 and 72 are formed in a shape of the same size as the planar shape of the upper and lower coils 20 and 30, and have two electrode members on one side of the upper and lower electrode members 71 and 72, respectively. First and second electrode terminals 71a and 72a are provided, and two third electrode terminals 74a are provided at the ends of the external electrode terminal member 74. The first and second electrode terminals 71a and 72a of the integrated electrode member 70 are connected so that each lead wire of the upper and lower coils 20 and 30 is individually connected to form a circuit with the third electrode terminal 74a. A pair of electrode patterns 75a, 75b, and 75c are formed.

A first member through hole 71b is formed in the center of the upper electrode member 71, and a U-shaped coil guide track 71c that pulls out the lead wires of the upper coil 20 is on one side of the first member through hole 71b. ) is formed in a combined shape, and two first electrode terminals 71a are provided around the coil guide track 71c for soldering and fixing the lead wire 21 of the upper coil 20.

A second member through hole 72b is formed in the center of the lower electrode member 72, and a U-shaped coil is guided to extract the lead wires 31 of the lower coil 30 on one side of the second member through hole 72b. The track 72c is formed in a combined shape, and two second electrode terminals 72a are provided around the coil guide track 72c for soldering and fixing the lead wire 31 of the lower coil 30. .

In addition, since the electrode patterns 75a and 75b, which are formed on both sides of the upper and lower electrode members 71 and 72 to form a circuit with + and - poles, must be electrically connected, the electrode pattern 75c on the lower surface must be connected to the upper surface. Connection holes 76a and 76b may be provided to electrically connect to the electrode pattern 75b.

The surface of the integrated electrode member 70, except for each electrode terminal portion, is preferably covered with an insulating sheet to insulate it from other components.

The double-sided adhesive pads 80 are two thin pads provided to improve assembly workability between the upper and lower coils 20 and 30 and the integrated electrode member 70. This double-sided adhesive pad 80 is formed in a planar shape when the upper coil 20 and the upper permanent magnet 50 are combined or the lower coil 30 and the lower permanent magnet 60 are combined, with the upper and A through hole (81) of the same size as the inner diameter of the lower coil (20, 30) is drilled, and an arc shape is formed on one outer periphery so as not to interfere with pulling out the lead wires (21, 31) of the upper and lower coils (20, 30). A coil withdrawal portion 82 is formed. The double-sided adhesive pad 80 may be of any type as long as the upper and lower surfaces have adhesive properties, and it is preferable that release paper is provided on the upper and lower surfaces that have adhesive properties.

The assembly process of the electromagnetic high-pitched speaker according to the present invention configured as described above will be explained.

First, the upper and lower permanent magnets (20, 30) are aligned on a work table and one upper and lower coil (20, 30) is inserted inside the upper and lower permanent magnets (50, 60), respectively. Obtain a magnetic circuit (see Figure 12). At this time, the lead lines 21 and 31 of the upper and lower coils 20 and 30 are drawn upward and protrude.

As shown above, attach one double-sided adhesive pad 80 on the upper permanent magnet 50 of the upper magnetic circuit and attach another double-sided adhesive pad 80 on the lower permanent magnet 60 of the lower magnetic circuit (Figure 13). At this time, the lead lines 21 and 31 of the upper and lower coils 20 and 30 are located within the coil lead-out portion 82 outside the double-sided adhesive pad 80, so care must be taken to prevent plastic deformation from occurring.

Afterwards, the integrated electrode member (70) is placed and attached to the upper surface of the double-sided adhesive pad (80) on the upper and lower coils (20, 30), and the upper electrode member (71) is located on the upper coil (20) and the lower coil. Attach the bottom electrode member 72 so that it is positioned above (30) (see Figure 14). At this time, the upper and second member through holes (71b, 72b) of the upper and lower electrode members (71, 72) are attached so as to match the inner diameters of the upper and lower coils (20, 30) forming the magnetic circuit, and the upper and lower The lead wires 21 and 31 of the coils 20 and 30 must be led out through the coil guide tracks 71c and 72c of the upper and lower electrode members 71 and 72.

As above, using the double-sided adhesive pad 80, the integrated electrode member 70 is equipped with the upper coil 20 and the upper permanent magnet 50, which are the upper magnetic circuit, as well as the lower coil 30 and the lower permanent magnet, which are the lower magnetic circuit ( The reason for attaching 60) is that the parts can be unitized, and the unitization of these parts makes it easier to assemble the housing 10 with the diaphragm 40, thereby improving work efficiency and productivity. Because.

After attaching the integrated electrode member 70 on the upper and lower coils 20 and 30 as described above, the upper surface is removed from one side of the lead lines 21 and 31 of the upper and lower coils 20 and 30 using a pressure roller. and the upper and lower coils (20, 30) by gently pressing and rolling in the direction of the first and second electrode terminals (71a, 72a) provided on one side of the coil guide tracks (71c, 72c) of the lower electrode members (71, 72). The lead lines 21 and 31 are bent in a horizontal state in contact with the first and second electrode terminals 71a and 72a on one side of the coil guide tracks 71c and 72c (see FIG. 15).

Afterwards, the ends of the lead wires 21 and 31 of the upper and lower coils 20 and 30 are located within the first and second electrode terminals 71a and 72a without leaving the first and second electrode terminals 71a and 72a. Cut it appropriately and then solder it.

Then, the housing 10 is set on a work table so that the sound outlet 11 is positioned downward, and then the upper electrode member 71 of the integrated electrode member 70 is seated within the housing 10. The first electrode terminal 71a of the upper electrode member 71 is positioned on the coil wire molding hole 12, and at the same time, the connection track 73 of the integrated electrode member 70 is connected to the electrode withdrawal incision of the housing 10. Provisionally assemble by inserting into the groove 13 (see FIG. 16).

In this state, the diaphragm 40 is placed on the upper coil 20 and the upper permanent magnet 50 as shown in FIG. 17, but the hole 43 in the center of the upper coil 20 and the diaphragm 40 is concentric. . Next, both ends of the connecting track 73 of the integrated electrode member 70 are bent at 90° each and the lower coil 30 and the lower permanent magnet 60 are temporarily assembled so that they are positioned on the diaphragm 40 (see FIG. 18). . At this time, the centers of the upper coil 20 and upper permanent magnet 50, which are the upper magnetic circuit, and the lower coil 30 and lower permanent magnet 60, which are the lower magnetic circuit, as well as the diaphragm 40 interposed between them, are concentric. It must be arranged to achieve.

Afterwards, the housing 10 is set in a press and the lower end of the housing 10 is bent 90° inward and molded, so that the upper and lower magnetic circuits along with the diaphragm 40 are mounted within the housing 10 (see Figure 19). As a result, a finished electromagnetic high-pitched speaker is obtained. If necessary, the lead wire 21 of the upper coil 20 can be molded by filling the coil wire molding hole 12 of the housing 10 with epoxy resin.

Figure 11 is a diagram showing another embodiment of an open diaphragm applied to the electromagnetic high-pitched speaker of the present invention. Here, an adjustment hole 45 is additionally formed for each vibrating blade 44 forming the open vibrating plate 40. The adjustment hole 45 is shown as being provided for each vibrating blade, but may be selectively formed only in some vibrating blades.

When the open diaphragm of another embodiment is applied to the electromagnetic high-pitched sound speaker of the present invention, it is freely driven in an arc shape based on the root portion of the vibrating blade 44, which is on the edge 42 side close to the outer periphery of the body 41. At this time, the area of the hole 43 increases due to the gap between the hole 43 and the vibrating blades 44, so the low-pitched sound extinction area has no choice but to increase to the high-pitched sound area. Due to this, the diameter of the hole 43 in the center of the body 41 as well as the spacing between the vibrating blades 44 and the adjustment hole 45 can be appropriately combined and adjusted according to the frequency of the high-pitched sound range to be obtained.

In other words, the smaller the diameter of the hole 43 and the spacing between the vibrating blades 44, the lower the bass extinction area, and the larger the diameter of the hole 43 and the spacing between the vibrating blades 44, the lower the bass sound extinction. As the range gradually increases and moves to the treble range, only higher sounds can be obtained.

Figure 20 is a diagram showing an electromagnetic high-pitched speaker of another embodiment according to the present invention. Here, the diameter of the edge 42 on the outside of the diaphragm 40 is set to be the same as the outside diameter of the upper and lower coils 20 and 30, and the upper and lower coils 20 are formed on the outside of the upper and lower coils 20 and 30. , 30) is prepared with a single permanent magnet (50A) with a stacked height.

According to another embodiment of the electromagnetic high-pitched speaker configured as described above, the permanent magnet (50A) is reduced to one, thereby reducing the overall number of assembly parts, which has the advantage of simplifying the assembly process and reducing assembly costs.

Since the description of the remaining configuration and operation is the same or similar to the previously described embodiment, detailed description thereof will be omitted.

Figure 21 is a graph comparing the frequency response characteristics of the electromagnetic high-pitched speaker according to the present invention with the frequency response characteristics of a conventional speaker.

As can be seen in the graph of FIG. 21, conventional electronic speakers showed the general characteristic of reproducing a high-pitched limit frequency in the approximately 10 kHz band. In contrast, the electromagnetic high-pitched speaker of the present invention has an open diaphragm that annihilates low frequencies by itself and reproduces only high frequencies, and the diaphragm itself has a very low mass and moves in an arc, so the high-pitched sound range extends to the ultra-high frequency range of 20 kHz or more at high speed. It has the characteristic of being reproduced in detail.

Although the present invention has been described above with reference to specific embodiments, the present invention is not limited to the embodiments disclosed in this specification and the accompanying drawings, and may be modified in various ways by those skilled in the art without departing from the technical spirit of the present invention. In addition, as long as the driving principle and arrangement of parts are consistent with the equivalent concept of the present invention, some design modification elements will all be included in the present invention.

10: Housing 11: Sound outlet
12: Coil wire molding hole 13: Electrode withdrawal incision groove
20: upper coil 21, 31: lead line
30: lower coil 40: diaphragm
41: body 42: edge
43: Hole 44: Vibrating wing
45: Adjustable hole 50: Upper permanent magnet
60: Lower permanent magnet 70: Integrated electrode member
71: upper electrode member 72: lower electrode member
73: Connection track 74: External electrode terminal member
80: Double-sided adhesive pad

Claims (7)

upper coil; a lower coil disposed opposite to the lower part of the upper coil; a diaphragm disposed between the coils; It includes one or more permanent magnets disposed outside the coils,
The diaphragm is an open-type diaphragm with a hole drilled in the center so that as the body around the hole moves up and down in an arc, the low-pitched sound region generated by the body itself is extinguished in anti-phase by the hole, and only the high-pitched sound generated by the arcuate movement of the body is emitted. An electromagnetic high-pitched speaker characterized by being provided with a diaphragm. According to paragraph 1,
The open diaphragm is an electromagnetic high-pitched speaker, characterized in that a plurality of vibrating blades are provided by radially cutting the inner peripheral surface of the hole. According to paragraph 2,
An electromagnetic high-pitched speaker, characterized in that an adjustment hole is formed in the vibrating blade of the open diaphragm. According to paragraph 1,
An electromagnetic high-pitched speaker, characterized in that the diaphragm is directly installed to be tightly supported without supply between the upper and lower coils, the edges of which are symmetrically arranged opposite each other. According to paragraph 1,
The upper and lower coils are a flexible printed circuit board that can cover the lower surface of the lower coil from the upper surface of the upper coil through one side of the upper and lower coils so that the respective (+) terminals and (-) terminals are connected in parallel. An electromagnetic high-pitched speaker characterized by an integrated electrode member made of FPCB. According to clause 5,
The integrated electrode member includes an upper electrode member covering the upper surface of the upper coil, a lower electrode member covering the lower surface of the lower coil, a connecting track connecting the upper and lower electrode members to each other, and a lower electrode member forming a straight line with the connecting track. An electromagnetic high-pitched speaker, characterized in that the external electrode terminal member extending from is provided integrally. In paragraph 6
An electromagnetic high-pitched speaker, characterized in that the upper coil and upper permanent magnet are attached to the upper electrode member with a double-sided adhesive pad, and the lower coil and lower permanent magnet are attached to the lower electrode member with a double-sided adhesive pad.

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