KR20230168506A - Speaker for improved vibration stability - Google Patents

Abstract

The present invention relates to a speaker with improved vibration stability.
The present invention includes a pair of upper and lower coils disposed to correspond to each other, a pair of permanent magnets provided outside the upper and lower coils, and a diaphragm provided between the upper and lower coils, and the diaphragm A reinforcing member with several wings arranged radially from the central disk is provided on one or both sides, or the rigidity of the diaphragm increases from the outer periphery to the center by supporting the diaphragm with a balance member on one or both sides of the diaphragm, thereby increasing the vibration expression portion. It is moved to the center and can expand the high-pitched sound of the diaphragm as well as maintain the balance of the diaphragm. As a result, it can be usefully used in the speaker field to improve vibration stability while increasing permeability and efficiency.

Description

Speaker with improved vibration stability {Speaker for improved vibration stability}

The present invention relates to a speaker with improved vibration stability, and more specifically, to a speaker with improved vibration stability by providing a reinforcement member to the diaphragm or supporting the diaphragm with a balance member.

Typically, an electromagnetic speaker is a type of audio device that achieves electro-acoustic conversion by vibrating a ferromagnetic diaphragm using the force generated by the interaction of alternating current magnetic force lines generated from a coil wound with a conductor and direct current magnetic force lines derived from a permanent magnet.

Related to this electromagnetic speaker, it is presented in Republic of Korea Patent No. 1596894 (hereinafter abbreviated as 'Document 1') and Republic of Korea Patent No. 2282417 (hereinafter abbreviated as 'Document 2').

The electromagnetic speakers of Document 1 and Document 2 have upper and lower coils arranged in correspondence, permanent magnets are arranged outside the upper and lower coils, and a diaphragm is arranged between the upper and lower coils, with the upper and lower surfaces of the diaphragm. It was placed between the permanent magnets along with the gap-guide so that the edges were supported by the upper and lower damper members.

In the electromagnetic speakers of Document 1 and Document 2 constructed as described above, the diaphragm is electromagnetized by the alternating magnetic force of the upper and lower coils and is driven directly by reacting with the direct current magnetic force of the permanent magnet in a state where the weight of the coil is excluded, thereby generating an electrical signal. This was to implement rapid response.

However, in the electromagnetic speakers of Document 1 and Document 2 as described above, there was a problem that split vibration and distortion of the diaphragm could occur because the vibrating copper plate, which was used to vibrate only up and down the diaphragm when the diaphragm was driven, was thin.

In addition, the electromagnetic speakers of Document 1 and Document 2 as described above cannot achieve vibration stability of the diaphragm if split vibration and distortion of the diaphragm occur, so a means for achieving vibration stability of the diaphragm is desperately needed.

(Document 1) KR 10-1596894 B1 (Registered on February 17, 2016) (Document 2) KR 10-2282417 B1 (Registered on July 21, 2021)

The present invention was researched and developed to solve various problems and disadvantages of the prior art as described above.

The purpose of the present invention is to increase efficiency by increasing permeability by providing a reinforcing member to the diaphragm or a balance member to support the diaphragm. In addition to expanding the high-pitched sound range, the diaphragm maintains its center when driven and vibrates. The goal is to provide speakers with improved vibration stability.

The speaker of the present invention for solving the problems described above includes a pair of upper and lower coils arranged to correspond to each other, a pair of upper and lower permanent magnets provided outside the upper and lower coils, the upper coil, and It includes a vibration plate provided with a stopper between the lower coils,

A reinforcing member is provided on one or both sides of the diaphragm with several wings arranged radially from the central disk so that the rigidity of the diaphragm increases as it moves from the outer periphery to the center.

In addition, the diaphragm is composed of an edge, which is an outer periphery, and a body inside the edge, and the edge and the body are connected by several bridges, and the bridge is covered with a bridge cover made of a ring with a semicircular cross-section. .

One or both sides of the diaphragm are supported by a balance member to maintain the balance of the diaphragm as well as to expand the high-pitched sound range of the diaphragm.

The balance member includes a flat outer support portion provided on the outer periphery, a horn-shaped sub-cone protruding at the center of the outer support portion to support one central surface of the diaphragm, and the sub-cone maintaining the center while maintaining the sub-cone. It is characterized by being provided with several suspensions provided between the support part and the sub-cone so that it can vibrate along the central axis of the cone.

The sub-cone is characterized in that a hemispherical central support portion is provided in the center to stably support the center of the diaphragm, and several embossing protrusions are provided radially arranged on the cone-shaped portion outside the central support portion. Do it as

In addition, the upper and lower coils inside the permanent magnet may be wound thicker than the thickness of the permanent magnet in order to expand alternating current electromagnetic force and increase efficiency and may be provided to protrude from one or both sides (upper and lower) of the permanent magnet.

According to the speaker of the present invention, a reinforcing member with several wings arranged radially from the central disk is provided on one or both sides of the diaphragm, and is made of the same or equivalent material as the diaphragm, so that the rigidity of the diaphragm increases as it moves from the outer periphery of the diaphragm to the center. This increases, and as a result, the vibration-producing part is moved to the center, and the permeability increases as the thickness of the diaphragm becomes thicker toward the center. This has the useful effect of improving vibration stability while seeking to increase efficiency due to increased permeability. .

In addition, according to the speaker of the present invention, the smaller the area of the multiple bridges connecting the edge of the diaphragm and the body, in other words, the larger the area of the bridge forming hole, the larger the low-pitched range, and the semicircular cross section in the bridge forming hole including the bridge By providing a bridge cover made of a ring, there is a useful effect of preventing the extinction of front and rear sounds generated by the diaphragm.

In addition, according to the speaker of the present invention, one or both sides of the diaphragm are supported by a balance member, so that the high-pitched sound range of the diaphragm can be expanded as well as the balance of the diaphragm can be maintained, and when the diaphragm is driven, the center is maintained and the diaphragm moves toward the center of the diaphragm. Because it accommodates vibration, there is a useful effect of improving vibration stability.

According to the speaker of the present invention, the strength of the sub-cone can be strengthened by providing several embossed protrusions radially on the sub-cone of the balance member, thereby maintaining the rigidity of the diaphragm, thereby improving vibration stability by suppressing split vibration and reducing distortion. There is a useful effect of enabling improvement.

Figure 1 is a longitudinal cross-sectional view showing a speaker with improved vibration stability according to a preferred embodiment of the present invention.
Figure 2 is a plan view, cross-sectional view, and bottom view showing a diaphragm extracted from a speaker with improved vibration stability according to the present invention.
Figure 3 is an exploded perspective view showing the diaphragm of Figure 2.
Figure 4 is a longitudinal cross-sectional view showing another embodiment of a speaker with improved vibration stability according to the present invention.
Figure 5 is a plan view, cross-sectional view, and bottom view showing the balance member extracted from the speaker of Figure 4.
Figure 6 is a perspective view of the balance member of Figure 5.
Figures 7 and 8 are longitudinal cross-sectional views showing another embodiment of a speaker with improved vibration stability according to the present invention.

Hereinafter, the advantages and features of the present invention and methods for achieving them will become clear with reference 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 may be implemented in various different forms. Only the embodiments are provided to ensure that the disclosure of the present invention is complete and to those skilled in the art to which the present invention pertains. It is provided to fully inform the person of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

1 to 3 are diagrams showing a speaker with improved vibration stability according to a preferred embodiment of the present invention.

As shown in the drawing, the speaker of the present invention includes a hollow housing 10, a pair of upper and lower coils 20a and 20b respectively disposed at the upper and lower portions of the housing 10, and the upper and lower coils 20a and 20b. and a pair of upper and lower permanent magnets (30a, 30b) disposed on the outside of the lower coils (20a, 20b), respectively, and a diaphragm provided with a stopper (50) between the upper and lower coils (20a, 20b). Includes (40).

The housing 10 has components that make up the speaker inside it: an upper coil (20a), a lower coil (20b), an upper permanent magnet (30a), a lower permanent magnet (30b), a diaphragm (40), and a PCB (PCB). 60) When the back is assembled, it is provided in a hollow cylindrical shape with a space surrounding it. The upper and lower ends of the housing 10 are open for radiation of sound generated by the vibration of the diaphragm 40, and one cylindrical peripheral surface of the housing 10 meets the lead lines of the upper and lower coils 20a and 20b. A cut groove for withdrawal may be provided. The housing 10 is made of a non-magnetic material such as aluminum.

The PCB 60 is a plate-shaped printed circuit board provided at the bottom of the lower coil 20b in the housing 10, and a hole is drilled in the center for radiation of sound generated by vibration of the diaphragm 40, The lead wires of the upper and lower coils 20a and 20b form a circuit and are electrically connected.

The upper and lower coils (20a, 20b) are wound to protrude from the inner upper and lower surfaces of the upper and lower permanent magnets (30a, 30b) so that the body 42 of the diaphragm 40 has an air gap in a range that does not affect vibration. do. The upper and lower coils (20a, 20b) are connected through a PCB (60) so that their respective magnetic force lines flow in opposition to each other, and a current is applied to the upper and lower coils (20a, 20b) through the PCB (60). The diaphragm 40 is driven from the alternating current magnetic force generated by.

The diaphragm 40 consists of an edge 41, which is an outer periphery, and a body 42 inside the edge 41, and the edge 41 and the body 42 are connected by several bridges 43, and the bridge ( 43) is covered by a bridge cover 44 made of a ring of semicircular cross-section.

In addition, the diaphragm 40 has an edge 41 in response to electrical positive (+) period and negative (-) period signals, which are electric currents applied to the upper and lower coils (20a, 20b) through the PCB (60). The body 42 connected through several bridges 43 performs up and down vibration, and a predetermined sound is obtained through this up and down vibration of the diaphragm 40.

As for the bridge 43, the smaller the overall area forming the bridge 43, the larger the low-pitched range. In other words, the larger the area of the bridge forming hole 431 for forming the bridge, the larger the low-pitched sound range.

The bridge cover 44 prevents the extinction of front and rear sounds generated by the body 42 of the diaphragm 40 because the bridge forming hole 431, including the bridge 43, is covered by a ring with a semicircular cross-section. I do it. The bridge cover 44 is made of a thin film of a non-magnetic material, and embossing grooves 441 may be arranged radially along the circumferential direction of the bridge cover 44 to enhance strength.

In addition, the diaphragm 40 is provided with a reinforcing member 46 on its lower surface to increase the rigidity of the diaphragm 40 from the outer periphery toward the center. The reinforcing member 46 is provided on the body 42 of the diaphragm 40 and is a plate-shaped reinforcing member with several wings 462 arranged radially from the central disk 461, and the body 42 of the diaphragm 40 ) and is preferably made of the same material or equivalent material. In addition, since the reinforcing member 46 is made of the same material or the same material as the body 42 of the diaphragm 40, adhesive is applied to the body 42 of the diaphragm 40 in comprehensive consideration of adhesive strength and workability. It can be bonded using heat or ultrasonic waves, etc.

The reason why the rigidity of the diaphragm 40 increases as it moves from the outer periphery of the diaphragm 40 to the center on one side of the body 42 of the diaphragm 40 is that the vibration-producing part moves to the center and the thickness of the diaphragm 40 increases. This is because the permeability increases as it becomes thicker toward the center, and vibration stability can be improved while seeking to increase efficiency through this increase in permeability.

The wings 462 of the reinforcing member 46 may be provided with ring-shaped setting bridges at their ends to maintain the radial arrangement without being disturbed, and may be numbered or shaped according to the required tone factor. It may be arranged differently.

In addition, the reinforcing member 46 is only shown and explained as being provided on the lower surface of the diaphragm 40, but it can also be provided on both the lower and upper surfaces of the diaphragm 40. If the reinforcing members 46 are provided on both sides of the diaphragm 40 in this way, it is possible to move the vibration-producing part of the diaphragm 40 more to the center as desired by the designer and increase the permeability.

The stopper 50 is disposed between the upper and lower permanent magnets 30a and 30b and is provided in a ring shape to support the upper and lower surfaces, which are the edges 41 of the diaphragm 40, and is made of non-magnetic metal or polymer material. It is prepared. Since the stopper 50 is sufficient to set the diaphragm 40 in the center between the upper and lower permanent magnets 30a and 30b, the damping condition for elastically supporting the diaphragm 40 is not particularly required. To elaborate, it would be more desirable if it were possible to form a mutually symmetrical air gap between the upper and lower coils 20a and 20b.

If necessary, a stabilization hole may be provided at the center of the body 42 of the diaphragm 40 and the center of the central disk 461 of the reinforcing member 46 to align the upper and lower sides of the diaphragm 40 with atmospheric pressure.

4 to 6 are diagrams showing another embodiment of a speaker with improved vibration stability according to the present invention.

A speaker according to another embodiment according to the present invention also includes a hollow housing 10, a pair of upper and lower coils 20a and 20b respectively disposed at the upper and lower portions of the housing 10, and the upper and lower coils 20a and 20b, respectively. A pair of upper and lower permanent magnets (30a, 30b) disposed on the outside of the lower coils (20a, 20b), respectively, and a diaphragm ( 40), and a balance member 70 is provided to support the lower surface of the diaphragm 40 on the lower surface of the lower coil 20b.

The balance member 70 is used to maintain the balance of the diaphragm 40 as well as to expand the high-pitched sound range of the diaphragm 40. The balance member 70 includes a flange-shaped outer support portion 71 provided on the outer periphery so that it can be seated at least in the inner center of the lower coil 20b, and a diaphragm (vibration plate) at the center of the outer support portion 71. A horn-shaped sub-cone 72 protruding to support one central surface of the body 42 of 40), and an outer support portion 71 so that the sub-cone 72 vibrates along the central axis while maintaining its center. It is provided with several suspensions 73 provided between sub-cones 72.

In addition, the balance member 70 may be provided with a cut groove on the outer support portion 71 for drawing the lead wire, which is the end of the lower coil 20b, to the PCB 60.

The sub-cone 72 is provided with a hemispherical dome-shaped central support portion 74 at its center to stably support the center of the body 42 of the diaphragm 40, and a horn-shaped outside of the central support portion 74. The portion may be provided with several embossing protrusions 75 arranged radially.

The suspension 73 connects the outer support 71 and the sub-cone 72, and is of a double-end bending type in the plane (both ends are in opposite directions) so that the sub-cone 72 can vibrate along the central axis while maintaining its center. It is desirable to have it in a curved shape) or S-shape.

In addition, since the balance member 70 must be vibrated by the diaphragm 40 while supporting the diaphragm 40, it is preferably made of a non-magnetic or diamagnetic material that is not affected by magnetic force.

According to the present inventor's speaker of another embodiment configured as described above, the lower surface of the diaphragm 40 is supported by the sub-cone 72 of the balance member 70, thereby expanding the high-pitched sound range of the diaphragm 40 and maintaining balance. do.

In addition, the sub-cone 72 of the balance member 70 is vibrated while connected by several suspensions 73, thereby maintaining the balance of the diaphragm 40 and driving the body 42 of the diaphragm 40. There is an advantage in that vibration stability is improved because vibration in the direction of the central axis of the diaphragm 40 is accommodated while maintaining the center.

In addition, the strength of the sub-cone 72 can be strengthened by providing several embossed protrusions 75 radially on the sub-cone 72 of the balance member 70, thereby maintaining the rigidity of the diaphragm 40. There is an advantage that vibration stability can be improved by suppressing split vibration and reducing distortion.

The balance member 70 is shown and described as being provided only on one side of the diaphragm 40, but it can also be provided on both sides, i.e., the upper and lower surfaces of the diaphragm 40. If the balance member 70 is provided on both sides of the diaphragm 40 in this way, it not only provides more stable support without bias that may occur on one side of the diaphragm 40 without the balance member 70, but also reinforces the strength. This allows for more stable high-pitched sound expansion and balancing.

Figure 7 is a diagram showing another embodiment of a speaker with improved vibration stability according to the present invention. Here, like the basic speaker of one embodiment, the speaker includes an upper coil (20a), a lower coil (20b), an upper permanent magnet (30a), a lower permanent magnet (30b), a diaphragm (40), a PCB (60), etc. It includes a reinforcing member 46 provided on both sides of the diaphragm 40, and the diaphragm 40 so as to support each of the reinforcing members 46 on both sides of the diaphragm 40 and vibrate together with the diaphragm 40. Both sides are supported by balance members 70.

According to the present invention's speaker of another embodiment configured as described above, reinforcing members 46 are provided on both sides of the diaphragm 40, so that the vibration-producing portion of the diaphragm 40 is moved more to the center as desired by the designer. This is possible, and the permeability can be increased. Since both sides of the diaphragm 40 are vibrated while supported by the balance member 70, the diaphragm 40 is supported more stably without bias toward one side, as well as the strength. Thanks to the reinforcement, more stable high-pitched sound expansion and balancing can be achieved.

Figure 8 is a diagram showing another embodiment of a speaker with improved vibration stability according to the present invention. Here, the upper coil (20a) inside the upper permanent magnet (30a) is wound thicker than the thickness of the upper permanent magnet (30a) to expand the alternating current electromagnetic force and increase efficiency, but protrudes more than the upper and lower surfaces of the upper permanent magnet (30a). It was highly recommended.

According to the speaker of the present invention in another embodiment configured as described above, the upper and lower coils 20a and 20b are equipped with upper and lower permanent magnets so that the upper and lower coils have an air gap in a range that does not affect the vibration of the body 42 of the diaphragm 40. By winding the coil so that it not only protrudes from the inner upper and lower surfaces of (30a, 30b) but also protrudes from the outer upper surface of the upper permanent magnet (30a), the alternating current electromagnetic force of the upper coil (20a) can be expanded, thereby increasing efficiency.

In the above, preferred embodiments of the present invention have been shown and described, but the present invention is not limited to the specific embodiments described above, and is common knowledge in the technical field to which the invention pertains without departing from the gist of the present invention as claimed in the claims. Of course, various modifications can be made by those who have, and these modifications should not be understood individually from the technical idea or perspective of the present invention.

10: Housing 20a: Upper coil
20b: lower coil 30a: upper permanent magnet
30b: Upper permanent magnet 40: Vibration plate
41: Edge 42: Body
43: bridge 44: bridge cover
46: Reinforcing member 50: Stopper
60: PCB 70: Balance member
71: outer support 72: sub cone
73: Suspension 74: Central support
75: Embossed protrusion 431: Hole for forming bridge
441: Embossing groove 441: Central disk
442: wings

Claims (9)

It includes upper and lower coils arranged to correspond to each other, a permanent magnet provided outside the upper and lower coils, and a diaphragm provided with a stopper between the upper and lower coils,
A speaker with improved vibration stability, characterized in that a reinforcing member is provided on one or both sides of the diaphragm with several wings arranged radially from the central disk so that the rigidity of the diaphragm increases as it moves from the outer periphery to the center. According to paragraph 1,
A speaker with improved vibration stability, wherein the reinforcing member is made of the same material as the diaphragm or a similar material. According to paragraph 1,
The diaphragm consists of an edge, which is an outer periphery, and a body inside the edge, and the edges and the body are connected by several bridges, and the bridge is covered with a bridge cover made of a ring with a semicircular cross-section. Vibration stability. Speakers that have improved. According to paragraph 3,
The bridge cover is a speaker with improved vibration stability, characterized in that the embossed grooves are arranged radially along the circumferential direction of the bridge cover. It includes upper and lower coils arranged to correspond to each other, a permanent magnet provided outside the upper and lower coils, and a diaphragm provided with a stopper between the upper and lower coils,
A speaker with improved vibration stability, characterized in that one or both sides of the diaphragm are supported by a balance member to maintain the balance of the diaphragm as well as to expand the high frequency range of the diaphragm. According to clause 5,
The balance member includes a flat outer support portion provided on the outer periphery, a horn-shaped sub-cone protruding at the center of the outer support portion to support one central surface of the diaphragm, and the sub-cone maintaining the center while maintaining the sub-cone. A speaker with improved vibration stability, characterized by being provided with several suspensions provided between the support part and the sub-cone to enable vibration along the central axis of the cone. According to clause 6,
A speaker with improved vibration stability, characterized in that the sub-cone is provided with a hemispherical central support portion in the center to stably support the center of the diaphragm. According to clause 6,
A speaker with improved vibration stability, wherein the sub-cone is provided with several embossed protrusions arranged radially on the cone-shaped portion outside the central support portion. According to claim 1 or 5,
A speaker with improved vibration stability, characterized in that the upper coil inside the permanent magnet is wound thicker than the thickness of the upper permanent magnet and protrudes from the upper and lower surfaces of the upper permanent magnet to expand alternating current electromagnetic force and increase efficiency.

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