KR20230166562A - The diaphragm for a speaker and the speaker including same - Google Patents

Abstract

The present invention includes a diaphragm part that vibrates along the vibration center axis to generate sound, an edge part extending along the edge of the diaphragm part and surrounding the diaphragm part, and a reinforcement part disposed in the diaphragm part, with respect to the radial and circumferential directions of the diaphragm part. Split vibration can be prevented.

Description

Diaphragm for a speaker and a speaker including the same {THE DIAPHRAGM FOR A SPEAKER AND THE SPEAKER INCLUDING SAME}

The present invention relates to a diaphragm for a speaker and a speaker including the same, and more specifically, to a diaphragm for a speaker that can prevent split resonance of the diaphragm and a speaker including the same.

The speaker uses the principle that when alternating current flows through a voice coil placed in the magnetic field of a magnetic circuit, it vibrates up and down according to Fleming's left-hand rule. The speaker's diaphragm operates dependently on the movement of the voice coil. The diaphragm vibrates along the central axis of vibration. At this time, there is a problem that split resonance occurs between the center of the diaphragm and the edge of the diaphragm depending on the rigidity of the diaphragm in the radial direction from the vibration center axis. Split resonance causes peaks and dips in frequency response characteristics, deteriorating sound reproduction performance.

One embodiment of the present invention aims to provide a diaphragm for a speaker that can improve acoustic performance by preventing split resonance of the diaphragm and a speaker including the same.

In order to achieve the above-mentioned object, the diaphragm for a speaker according to an embodiment of the present invention includes a diaphragm portion that vibrates along a vibration center axis to generate sound, an edge portion that extends along the edge of the diaphragm portion and surrounds the diaphragm portion, and a reinforcing part disposed on the diaphragm part.

In addition, the reinforcing part is characterized in that it is fiber-reinforced plastic.

In addition, the reinforcement part is characterized in that it is disposed on at least one of the upper and lower surfaces of the diaphragm part.

In addition, the diaphragm portion has a central hole in the center, and a plurality of reinforcing portions are disposed between the central hole and the edge portion.

In addition, the reinforcing portion includes a first end in contact with the edge portion, a second end spaced apart from the first end toward the central hole, and an extension portion extending from the first end toward the second end, and the plurality of reinforcing portions are formed in a plan view. It is characterized by being equiangularly spaced based on the vibration center axis.

In addition, the reinforcing part has a ring shape extending in the circumferential direction based on the central axis of vibration on a plane, and the plurality of reinforcing parts are characterized in that their radii gradually increase as they move from the central axis of vibration to the edge portion.

In addition, the extension part is characterized in that it is arranged in contact with the central hole in a plan view.

In addition, at least one pair of reinforcing parts among the plurality of reinforcing parts is arranged to be spaced apart with the central hole in between, and one of the pair of reinforcing parts passes through the central axis of vibration in the plane and is located on the left side of the central straight line crossing the central hole. It is disposed, and the other is disposed on the right side of the central straight line.

In addition, the reinforcement portion includes a first end in contact with the edge portion, a second end in contact with the edge portion at a position spaced circumferentially from the first end, and an extension portion extending from the first end to the second end. do.

In addition, it is characterized in that it further includes a coupling part that couples the diaphragm part and the edge part.

Additionally, the speaker according to an embodiment of the present invention is characterized by including the diaphragm for the speaker described above.

According to the present invention, split resonance caused by the difference in vibration between the center portion and the edge portion depending on the rigidity of the diaphragm can be prevented.

In addition, since a plurality of reinforcing plates are arranged to ensure appropriate rigidity so that the rigidity of the diaphragm is not too low or too high, split resonance occurring at low frequencies or split resonance occurring at high frequencies can be prevented.

In addition, by preventing split resonance, peaks and dips in the frequency response are prevented, so acoustic performance can be improved.

1 is a diagram schematically showing a diaphragm for a speaker and a speaker according to an embodiment of the present invention.
FIG. 2 is a plan view schematically showing an embodiment of the diaphragm for a speaker shown in FIG. 1.
FIG. 3 is a diagram illustrating another embodiment of the diaphragm for a speaker shown in FIG. 2.
FIG. 4 is a diagram illustrating another embodiment of the diaphragm for a speaker shown in FIG. 3.
FIG. 5 is a diagram illustrating another embodiment of the diaphragm for a speaker shown in FIG. 2.
FIG. 6 is a diagram illustrating another embodiment of the diaphragm for a speaker shown in FIG. 2.
FIG. 7 is a diagram illustrating another embodiment of the diaphragm for a speaker shown in FIG. 2.
FIG. 8 is a diagram illustrating another embodiment of the diaphragm for a speaker shown in FIG. 2.
FIG. 9 is a diagram illustrating another embodiment of the diaphragm for a speaker shown in FIG. 8.

Like reference numerals refer to substantially the same elements throughout the specification. In the following description, detailed descriptions of configurations and functions known in the technical field of the present invention and cases not related to the core configuration of the present invention may be omitted. The meaning of terms described in this specification should be understood as follows.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms. The present embodiments only serve to ensure that the disclosure of the present invention is complete and that common knowledge in the technical field to which the present invention pertains is not limited. It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims.

The shapes, sizes, proportions, angles, numbers, etc. disclosed in the drawings for explaining embodiments of the present invention are illustrative, and the present invention is not limited to the matters shown. Like reference numerals refer to like elements throughout the specification. Additionally, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

When 'includes', 'has', 'consists of', etc. mentioned in this specification are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, the plural is included unless specifically stated otherwise.

When interpreting a component, it is interpreted to include the margin of error even if there is no separate explicit description.

In the case of a description of a positional relationship, for example, if the positional relationship of two parts is described as 'on top', 'on the top', 'on the bottom', 'next to', etc., 'immediately' Alternatively, there may be one or more other parts placed between the two parts, unless 'directly' is used.

In the case of a description of a temporal relationship, for example, if a temporal relationship is described as 'after', 'successfully after', 'after', 'before', etc., 'immediately' or 'directly' Unless used, non-consecutive cases may also be included.

Although first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are merely used to distinguish one component from another. Accordingly, the first component mentioned below may also be the second component within the technical spirit of the present invention.

“X-axis direction,” “Y-axis direction,” and “Z-axis direction” should not be interpreted as only geometrical relationships in which the relationship between each other is vertical, and should be used within a wider scope within which the configuration of the present invention can function functionally. It can mean having direction.

The term “at least one” should be understood to include all possible combinations from one or more related items. For example, “at least one of the first, second, and third items” means each of the first, second, or third items, as well as two of the first, second, and third items. It can mean a combination of all items that can be presented from more than one.

Each feature of the various embodiments of the present invention can be combined or combined with each other, partially or entirely, and various technological interconnections and operations are possible, and each embodiment can be implemented independently of each other or together in a related relationship. It may be possible.

Hereinafter, a diaphragm 1000 for a speaker and a speaker 1 including the same according to an embodiment of the present invention will be described with reference to the drawings.

Figure 1 is a diagram schematically showing a diaphragm 1000 for a speaker and a speaker 1 according to an embodiment of the present invention, and Figure 2 is a diagram schematically showing an embodiment of the diaphragm 1000 for a speaker shown in Figure 1. This is a floor plan shown as .

Referring to Figures 1 and 2, the speaker 1 according to an embodiment of the present invention includes a speaker diaphragm 1000, a magnetic circuit module 50, a voice coil unit 60, and a frame 70. The frame 70 can support the speaker diaphragm 1000 and the magnetic circuit module 50. The magnetic circuit module 50 forms a magnetic gap. The voice coil portion 60 is disposed in the magnetic gap. Additionally, the voice coil unit 60 is connected to the diaphragm 1000 for a speaker. According to the power applied to the voice coil unit 60, the voice coil unit 60 vibrates along the vibration center axis (A). As a result, the speaker diaphragm 1000 can vibrate along the vibration center axis A to reproduce sound.

The magnetic circuit module 50 includes a yoke 500, a magnet 510, and a pole piece 520. The yoke 500 supports the magnet 510. The magnet 510 is disposed on the yoke 500. The pole piece 520 is disposed on the magnet 510. A magnetic gap may be formed between the yoke 500 and the magnet 510, and between the yoke 500 and the pole piece 520. The voice coil unit 60 includes a bobbin 600 and a voice coil 610. The bobbin 600 has a cylindrical shape. The voice coil 610 is wound around the bobbin 600. Power is applied to the voice coil 610. The voice coil 610 is disposed in the magnetic gap, and the upper end of the voice coil portion 60 may be coupled to the speaker diaphragm 1000.

The diaphragm 1000 for a speaker according to an embodiment of the present invention may include a diaphragm portion 10, an edge portion 20, and a reinforcement portion 30. The diaphragm unit 10 may generate sound by vibrating along the vibration center axis (A). The edge portion 20 extends along the edge of the diaphragm portion 10 and surrounds the diaphragm portion 10. The reinforcement part 30 is disposed in the diaphragm part 10. The reinforcement portion 30 can prevent split vibration by reinforcing the rigidity of the diaphragm portion 10 between the inner and outer peripheral surfaces of the diaphragm portion 10. Split vibration refers to a phenomenon in which vibration is not constant in the radial or circumferential direction based on the vibration center axis (A). Split vibration generates peaks and dips in frequency response characteristics, deteriorating sound quality.

The diaphragm portion 10 is disposed to be inclined in its cross-section with respect to a plane parallel to the vibration center axis A. The diaphragm portion 10 has a central hole H disposed at its center. The central hole (H) has the vibration center axis (A) as its center. A voice coil unit 60 may be disposed near the central hole (H). The voice coil unit 60 may be coupled to the diaphragm unit 10 using an adhesive material. The central hole (H) may extend along the voice coil portion (60). The height of the diaphragm portion 10 may increase along the vibration center axis (A) as it moves from the central hole (H) to the edge portion (20). The edge portion 20 is connected to the frame 70 and the diaphragm portion 10.

The reinforcement part 30 may be disposed on at least one of the upper and lower surfaces of the diaphragm part 10. In one embodiment, the reinforcement part 30 may be adhered to the diaphragm part 10 through an adhesive material (not shown). As a result, performance can be improved by attaching the reinforcement part 30 to a conventional diaphragm. In another embodiment, the reinforcing part 30 may be placed in a mold frame and attached to the diaphragm part 10 by injection molding. Additionally, the reinforcement portion 30 may include a fiber-reinforced plastic material. As a result, the reinforcing part 30 can reinforce the rigidity of the diaphragm part 10 with strong elasticity in a local part of the diaphragm part 10.

Meanwhile, the diaphragm unit 10 may be made of materials such as pulp, polypropylene, and aluminum. The edge portion 20 may be made of a material such as rubber, plastic, or cotton cloth. The diaphragm portion 10 and the edge portion 20 may be coupled by a coupling portion 40 . The coupling portion 40 may be a bonding material. The coupling portion 40 may be disposed between the edge portion 20 and the diaphragm portion 10. The diaphragm part 10 and the edge part 20 are made of different materials, and the voice coil part 60 is coupled to the inside of the diaphragm part 10, so split resonance may occur in the radial direction of the diaphragm part 10. there is. The reinforcing part 30 according to the present invention can prevent split resonance by reinforcing the rigidity of the diaphragm part 10 in the radial direction.

In one embodiment, a plurality of reinforcement parts 30 may be disposed between the central hole H and the edge part 20. The plurality of reinforcement parts 30 may be arranged to be spaced apart along the circumferential direction. As a result, the rigidity of the diaphragm portion 10 can be strengthened in the circumferential direction, and split resonance in the radial and circumferential directions can be prevented.

FIG. 3 is a diagram showing another embodiment of the speaker diaphragm 1000 shown in FIG. 2, and FIG. 4 is a diagram showing another embodiment of the speaker diaphragm 1000 shown in FIG. 3.

1 to 4, the reinforcement portion 30 may include a first end 300, a second end 310, and an extension portion 320. In one embodiment, the first end 300 contacts the edge portion 20. The second end 310 is spaced apart from the first end 300 toward the central hole (H). The second end 310 may be in contact with the central hole (H). The extension portion 320 extends from the first end 300 toward the second end 310. The reinforcement part 30 may extend to a predetermined length along the radial direction of the diaphragm part 10. That is, the reinforcement portion 30 may extend in a straight line. As a result, split resonance can be prevented in the radial direction of the diaphragm portion 10. In addition, when the reinforcement part 30 is adhered to the diaphragm part 10 using an adhesive material, it is easy to attach and arrange the reinforcement part 30 to the diaphragm part 10.

In addition, the plurality of reinforcement parts 30 may be spaced apart at an equal angle (a) with respect to the vibration center axis (A) in a plane. The arrangement angle (a) of the reinforcement part 30 may be set according to the rigidity of the diaphragm part 10. When there are three reinforcement parts 30, the angle between the reinforcement parts 30 may be 120 degrees. Additionally, when there are four reinforcement parts 30, the angle between the reinforcement parts 30 may be 90 degrees. When there are six reinforcement parts 30, the angle between the reinforcement parts 30 may be 60 degrees. In addition, when the number of reinforcing parts 30 is even, a pair of reinforcing parts 30 among the even number of reinforcing parts 30 may be arranged to face each other (on the same line) with respect to the vibration center axis A.

FIG. 5 is a diagram illustrating another embodiment of the speaker diaphragm 1000 shown in FIG. 2.

Referring to FIG. 5, the plurality of reinforcement parts 30 may be arranged to face each other with the vibration center axis A interposed therebetween. For example, among the plurality of reinforcement parts 30, at least one pair of reinforcement parts 30 is arranged to be spaced apart with a central hole H in between. Here, one of the pair of reinforcing portions 30 passes through the vibration center axis (A) on a plane and is disposed on the left side of the central straight line (Y) crossing the central hole (H), Another reinforcement portion 30 may be placed on the right side of the central straight line (Y). In addition, the other pair of reinforcement parts 30 among the plurality of reinforcement parts 30 may be arranged to face each other with the central hole H in between and may be arranged on the same line (X).

FIG. 6 is a diagram illustrating another embodiment of the speaker diaphragm 1000 shown in FIG. 2.

Referring to FIG. 6 , the reinforcement portion 30 includes a first end 300, a second end 310, and an extension portion 320. The first end 300 may be disposed in contact with the edge portion 20 . The second end 310 is disposed around the central hole (H). The extension portion 320 extends from the first end 300 toward the second end 310. At this time, the extension portion 320 is disposed in contact with the central hole (H) in plan view. That is, the extension portion 320 between the first end 300 and the second end 310 may contact the inner peripheral surface of the diaphragm portion 10 that defines the central hole (H). Accordingly, the extension portion 320 may extend longer between the central hole H and the edge portion 20. Here, the contact points between the plurality of reinforcement parts 30 and the central hole (H) are equiangularly spaced apart.

FIG. 7 is a diagram illustrating another embodiment of the speaker diaphragm 1000 shown in FIG. 2.

Referring to FIG. 7, the reinforcement portion 30 may have a ring shape extending in the circumferential direction with respect to the vibration center axis A in a plan view. Thereby, the rigidity of the diaphragm portion 10 in the circumferential direction can be reinforced. Additionally, the radius (R) of the plurality of reinforcement parts 30 may gradually increase as it moves from the vibration center axis A to the edge part 20. That is, the plurality of ring-shaped reinforcement parts 30 may be spaced apart in the radial direction between the edge part 20 and the central hole (H). As a result, the rigidity of the diaphragm portion 10 in the radial direction can be reinforced.

FIG. 8 is a diagram showing another embodiment of the speaker diaphragm 1000 shown in FIG. 2, and FIG. 9 is a diagram showing another embodiment of the speaker diaphragm 1000 shown in FIG. 8.

8 and 9, the reinforcement portion 30 includes a first end 300, a second end 310, and an extension portion 320. The first end 300 contacts the edge portion 20. The second end 310 contacts the edge portion 20 at a position spaced apart from the first end 300 in the circumferential direction. The extension portion 320 may extend from the first end 300 to the second end 310 along a predetermined trajectory.

In one embodiment, the first end 300 of the first reinforcement part 30 among the plurality of reinforcement parts 30 is in contact with the first position P1 of the edge part 20, and the first end 300 of the first reinforcement part 30 is in contact with the first position P1 of the edge part 20. The second end 310 contacts the second position P2 of the edge portion 20. The extension portion 320 of the first reinforcement portion 30 may extend in a straight line from the first end 300 to the second end 310 of the first reinforcement portion 30.

Among the plurality of reinforcement parts 30, the first end 300 of the second reinforcement part 30 is in contact with the third position P3 of the edge part 20, and the second end of the second reinforcement part 30 ( 310) contacts the fourth position (P4) of the edge portion 20. The extension portion 320 of the second reinforcement portion 30 may extend in a straight line from the first end 300 to the second end 310 of the second reinforcement portion 30.

Among the plurality of reinforcement parts 30, the first end 300 of the third reinforcement part 30 is in contact with the fifth position P5 of the edge part 20, and the second end of the third reinforcement part 30 ( 310) contacts the sixth position (P6) of the edge portion 20. The extension part 320 of the third reinforcement part 30 may extend in a straight line from the first end 300 to the second end 310 of the third reinforcement part 30. The first to third reinforcement parts 30 are disposed between the central hole H and the edge part 20. That is, the first to third reinforcement parts 30 may be arranged in a substantially triangular shape. As a result, the rigidity of the diaphragm portion 10 in the radial and circumferential directions can be strengthened, and split vibration (resonance) in the radial and circumferential directions can be prevented.

In another embodiment, the first end 300 of the first reinforcement part 30 among the plurality of reinforcement parts 30 is in contact with the first position P1 of the edge part 20, and the first end 300 of the first reinforcement part 30 is in contact with the first position P1 of the edge part 20. The second end 310 contacts the second position P2 of the edge portion 20. The extension part 320 of the first reinforcement part 30 may extend in a curve from the first end 300 to the second end 310 of the first reinforcement part 30. That is, the extension portion 320 of the first reinforcement portion 30 may extend along a convex curved trajectory toward the central hole (H).

Among the plurality of reinforcement parts 30, the first end 300 of the second reinforcement part 30 is in contact with the third position P3 of the edge part 20, and the second end of the second reinforcement part 30 ( 310) contacts the fourth position (P4) of the edge portion 20. The extension part 320 of the second reinforcement part 30 may extend in a curve from the first end 300 to the second end 310 of the second reinforcement part 30. That is, the extension portion 320 of the second reinforcement portion 30 may extend along a convex curved trajectory toward the central hole (H).

Among the plurality of reinforcement parts 30, the first end 300 of the third reinforcement part 30 is in contact with the fifth position P5 of the edge part 20, and the second end of the third reinforcement part 30 ( 310) contacts the sixth position (P6) of the edge portion 20. The extension part 320 of the third reinforcement part 30 may extend in a curve from the first end 300 to the second end 310 of the third reinforcement part 30. That is, the extension portion 320 of the third reinforcement portion 30 may extend along a convex curved trajectory toward the central hole (H). The first to third reinforcement parts 30 are disposed between the central hole H and the edge part 20. As a result, the rigidity of the diaphragm portion 10 in the radial and circumferential directions can be strengthened, and split vibration (resonance) in the radial and circumferential directions can be prevented.

Although the invention made by the present inventor has been described in detail according to the above-mentioned embodiments, the present invention is not limited to the above-described embodiments and, of course, can be changed in various ways without departing from the gist of the invention.

1: Speaker
1000: Vibration plate for speaker
10: Diaphragm part
20: edge part
30: reinforcement part
300: first end
310: second end
320: extension part
40: coupling part
50: magnetic circuit module
500: York
510: Magnet
520: Pole piece
60: Part of voice coil
600: Bobbin
610: Voice coil
70: frame

Claims (11)

A diaphragm unit that generates sound by vibrating along the vibration center axis;
an edge portion extending along the edge of the diaphragm portion and surrounding the diaphragm portion; and
A diaphragm for a speaker including a reinforcement portion disposed in the diaphragm portion. According to claim 1,
The reinforcement part is a diaphragm for a speaker made of fiber-reinforced plastic. According to claim 1,
The reinforcement unit is a diaphragm for a speaker disposed on at least one of the upper and lower surfaces of the diaphragm unit. According to claim 1,
The diaphragm portion has a central hole in the center,
The reinforcing part is a plurality of diaphragms for speakers arranged between the central hole and the edge part. According to claim 4,
The reinforcement part,
A first end in contact with the edge portion;
a second end spaced apart from the first end toward the central hole; and
It includes an extension extending from the first end toward the second end,
The plurality of reinforcement parts are diaphragms for speakers spaced equiangularly based on the central axis of vibration on a plane. According to claim 4,
The reinforcement part,
It has a ring shape extending in the circumferential direction based on the vibration center axis in the plane,
A plurality of reinforcing parts is a diaphragm for a speaker whose radius gradually increases from the vibration center axis to the edge part. According to claim 5,
The extension part is a diaphragm for a speaker arranged in contact with the central hole in a plan view. According to claim 4,
At least one pair of reinforcing parts among the plurality of reinforcing parts is arranged to be spaced apart with a central hole in between,
One of the pair of reinforcing parts passes through the vibration center axis in plan and is placed on the left side of the central straight line crossing the central hole, and the other is a speaker diaphragm located on the right side of the central straight line. According to claim 4,
The reinforcement part,
A first end in contact with the edge portion;
a second end contacting the edge portion at a position spaced circumferentially from the first end; and
A diaphragm for a speaker including an extension extending from a first end to a second end. According to paragraph 1,
A diaphragm for a speaker further comprising a coupling part that couples the diaphragm part and the edge part. A speaker including the diaphragm for the speaker of claim 1.

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