KR102754313B1 - Speaker for improved vibration stability - Google Patents

Abstract

The present invention relates to a speaker having improved vibration stability.
The present invention comprises a pair of upper and lower coils arranged to correspond to each other, a pair of permanent magnets provided on the outer sides of the upper and lower coils, and a diaphragm provided between the upper and lower coils, wherein a reinforcing member having a plurality of wings radially arranged from a central plate is provided on one or both sides of the diaphragm, or a balance member is provided on one or both sides of the diaphragm so that the rigidity of the diaphragm increases from the outer periphery of the diaphragm to the center, so that a vibration generating portion moves to the center, and not only the high-frequency range of the diaphragm is expanded, but also the balance of the diaphragm is maintained, and thus the present invention can be usefully utilized in the field of speakers that seeks to increase permeability and efficiency while improving vibration stability.

Description

Speaker for improved vibration stability

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

Typically, an electromagnetic speaker is an acoustic device that converts electricity to sound by vibrating a ferromagnetic diaphragm using the force generated by the interaction of alternating magnetic force lines generated from a coil wound with a conductor and direct current magnetic force lines induced from a permanent magnet.

Related to such electromagnetic speakers are disclosed in Korean Patent No. 1596894 (hereinafter referred to as “Document 1”) and Korean Patent No. 2282417 (hereinafter referred to as “Document 2”).

The electromagnetic speakers of the above documents 1 and 2 have upper and lower coils arranged correspondingly, permanent magnets arranged on the outside of the upper and lower coils, and a diaphragm arranged between the upper and lower coils, with a gap guide arranged between the permanent magnets so that the upper and lower edges of the diaphragm are supported by upper and lower damper members.

The electromagnetic speakers of documents 1 and 2 configured as described above were intended to implement rapid response to electric signals, as the diaphragm is electromagnetized by the alternating magnetic force of the upper and lower coils, and is directly driven by reacting with the direct current magnetic force of the permanent magnet while the weight of the coil is excluded.

However, in the electromagnetic speakers of the above-mentioned documents 1 and 2, there was a problem that the vibration plate, which is used only to vibrate up and down when the vibration plate is driven, was a thin plate, so that split vibration and distortion of the vibration plate could occur.

In addition, as the electromagnetic speakers of the above-mentioned documents 1 and 2 cannot ensure vibration stability of the diaphragm if split vibration and distortion of the diaphragm occur, a means for ensuring vibration stability of the diaphragm was urgently required.

(Document 1) KR 10-1596894 B1 (Registered on February 17, 2016) (Document 2) KR 10-2282417 B1 (Registered on 2021.07.21)

The present invention has been researched and developed to solve the above-mentioned problems and disadvantages of the conventional methods.

The purpose of the present invention is to provide a speaker in which efficiency is increased by increasing the investment rate by providing a reinforcing member to a diaphragm or a balancing member to support the diaphragm, and in which the high-pitched range is expanded and vibration stability is improved by vibrating while maintaining the center when the diaphragm is driven.

The speaker of the present invention for solving the above-mentioned problem comprises a pair of upper and lower coils arranged correspondingly to each other, a pair of upper and lower permanent magnets provided on the outer side of the upper and lower coils, and a diaphragm provided with a stopper between the upper and lower coils.

It is characterized in that a reinforcing member is provided on one or both sides of the above-mentioned diaphragm with several wings radially arranged from a central plate so that the rigidity of the diaphragm increases from the outer periphery to the center.

In addition, the vibration plate is characterized in that it is composed of an edge as an outer peripheral portion and a body on the inner side thereof, and the edge and the body are connected by several bridges, and the bridges are covered with a bridge cover made of a ring with a semicircular cross-section.

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

The above balance member is characterized by comprising a flat outer support portion provided on an outer periphery, a horn-shaped sub-cone protruding from the center of the outer support portion to support a central surface of a vibrating plate, and several suspensions provided between the support portion and the sub-cones so that the sub-cone can vibrate along the central axis of the sub-cone while maintaining its center.

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

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

According to the speaker of the present invention, a reinforcing member having several wings radially arranged from a central plate is provided on one or both sides of a diaphragm, and by providing a reinforcing member made of the same or equivalent material as the diaphragm, the rigidity of the diaphragm increases from the outer periphery of the diaphragm to the center, and as a result, not only is the vibration generating portion moved to the center, but as the thickness of the diaphragm becomes thicker toward the center, the permeability increases, and as the permeability increases, the efficiency is increased, thereby enabling the improvement of vibration stability, which is a useful effect.

In addition, according to the speaker of the present invention, the smaller the area of the plurality of bridges connecting the edge of the diaphragm and the body, in other words, the larger the area of the hole for forming the bridge, the more the low-frequency range expands, and since a bridge cover in the form of a semicircular ring is provided in the bridge-forming hole portion including the bridge, there is a useful effect of preventing the disappearance of front/rear sounds generated by the diaphragm.

In addition, according to the speaker of the present invention, since one side or both sides of the diaphragm are supported by a balance member, the high-frequency range of the diaphragm can be expanded and the balance of the diaphragm can be maintained, and since the diaphragm receives vibration toward the center of the diaphragm while maintaining the center when driven, there is a useful effect of enabling improvement of vibration stability.

According to the speaker of the present invention, by radially providing several embossing projections on the sub-cone of the balance member, the strength of the sub-cone can be reinforced, and thereby the rigidity of the diaphragm can be maintained, thereby suppressing split vibration and reducing distortion, thereby providing a useful effect of improving vibration stability.

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

Hereinafter, the advantages and features of the present invention, and the method for achieving them will be apparent by referring to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and the embodiments are provided only to make the disclosure of the present invention complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

FIGS. 1 to 3 are drawings illustrating 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, 20b) arranged correspondingly to each other at the upper and lower portions within the housing (10), a pair of upper and lower permanent magnets (30a, 30b) arranged respectively on the outer sides of the upper and lower coils (20a, 20b), and a diaphragm (40) provided between the upper and lower coils (20a, 20b) together with a stopper (50).

The housing (10) is provided in a hollow cylindrical shape with a space that surrounds the speaker components, such as an upper coil (20a), a lower coil (20b), an upper permanent magnet (30a), a lower permanent magnet (30b), a diaphragm (40), and a PCB (60), assembled therein. The upper and lower ends of the housing (10) are opened for radiation of sound generated by the vibration of the diaphragm (40), and a cut groove may be provided on one cylindrical surface of the housing (10) for leading the lead wires of the upper and lower coils (20a, 20b). The housing (10) is provided with a non-magnetic material, such as aluminum.

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

The upper and lower coils (20a, 20b) are wound so as 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 that does not affect vibration. 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 the diaphragm (40) is driven by an alternating magnetic force generated by a current applied to the upper and lower coils (20a, 20b) through the PCB (60).

The above-mentioned vibration plate (40) is composed of an edge (41) which is an outer peripheral portion and a body (42) on the inner side thereof. The edge (41) and the body (42) are connected by several bridges (bridges, 43), and the bridges (43) are covered by a bridge cover (44) which is a ring with a semicircular cross-section.

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

The lower range of the above bridge (43) expands as the total area of the bridge (43) becomes smaller. In other words, the larger the area of the bridge-forming hole (431) for forming the bridge, the larger the lower range of the bridge.

The above bridge cover (44) prevents the front/rear sound from being lost due to the body (42) of the diaphragm (40) since the bridge-forming hole (431) including the bridge (43) is covered by a semicircular cross-section ring. The above bridge cover (44) is made of a non-magnetic thin film, but embossing grooves (441) can be radially arranged along the circumferential direction of the bridge cover (44) to enhance strength.

In addition, the vibration plate (40) is provided with a reinforcing member (46) to increase the rigidity of the vibration plate (40) from the outer periphery to the center on its lower surface. The reinforcing member (46) is a plate-shaped reinforcing member provided on the body (42) of the vibration plate (40) and having several wings (462) arranged radially from a central plate (461), and is preferably provided with the same material as the body (42) of the vibration plate (40) or a material of the same class. In addition, since the reinforcing member (46) is provided with the same material as the body (42) of the vibration plate (40) or a material of the same class, it can be bonded to the body (42) of the vibration plate (40) using an adhesive or welded by heating or ultrasonic waves, taking into comprehensive consideration the adhesive strength and workability.

The reason why the rigidity of the vibration plate (40) is increased from the outer periphery of the vibration plate (40) toward the center on one side of the body (42) of the vibration plate (40) is that the vibration generating part moves to the center and the thickness of the vibration plate (40) becomes thicker toward the center, thereby increasing the investment rate, and while seeking to increase efficiency through this increase in investment rate, improvement in vibration stability can be obtained.

The wing (462) of the above reinforcing member (46) may be provided with a ring-shaped setting bridge at its end to maintain the radial arrangement without disruption, and the number and shape thereof may be provided differently depending on the required tone factor.

In addition, the reinforcing member (46) is described and illustrated as being provided only on the lower surface of the vibration plate (40), but it may be provided on both surfaces, that is, the lower surface and the upper surface of the vibration plate (40). If the reinforcing member (46) is provided on both surfaces of the vibration plate (40) in this way, the vibration generating portion of the vibration plate (40) can be moved more toward the center as desired by the designer, and the investment rate can be increased.

The above stopper (50) is provided in a ring shape to be placed between the upper and lower permanent magnets (30a, 30b) and to support the upper and lower surfaces, which are the edges (41) of the diaphragm (40), and is provided with a non-magnetic metal or polymer material. Since the stopper (50) is sufficient if it can set the diaphragm (40) in the center between the upper and lower permanent magnets (30a, 30b), a 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, 20b).

A stabilizing hole may be provided in the center of the body (42) of the above-mentioned vibrating plate (40) and the center of the central plate (461) of the reinforcing member (46) to align the upper and lower sides of the vibrating plate (40) with the atmospheric pressure, if necessary.

FIGS. 4 to 6 are drawings illustrating other embodiments of a speaker with improved vibration stability according to the present invention.

Another embodiment of a speaker according to the present invention also includes a hollow housing (10), a pair of upper and lower coils (20a, 20b) which are arranged correspondingly to each other at the upper and lower portions of the housing (10), a pair of upper and lower permanent magnets (30a, 30b) which are respectively arranged on the outer sides of the upper and lower coils (20a, 20b), and a diaphragm (40) which is provided between the upper and lower coils (20a, 20b) together with a stopper (50), wherein a balance member (70) which supports a lower surface of the diaphragm (40) is provided on a lower surface of the lower coil (20b).

The above balance member (70) is provided to maintain the balance of the diaphragm (40) as well as to expand the high-pitched range of the diaphragm (40). The above balance member (70) is provided with a flange-shaped outer support member (71) provided on the outer periphery so that it can be settled at least in the inner center of the lower surface of the lower coil (20b), a horn-shaped sub-cone (72) that is protruded in the center of the outer support member (71) so as to support the central surface of the body (42) of the diaphragm (40), and several suspensions (73) provided between the outer support member (71) and the sub-cones (72) so that the sub-cones (72) vibrate along the central axis while maintaining the center.

In addition, the balance member (70) may have a cutting groove provided in the outer support member (71) for leading the lead wire, which is the end of the lower coil (20b), to the PCB (60).

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

The above suspension (73) connects the outer support member (71) and the sub-cone (72), and is preferably provided in a planar double-ended shape (a shape in which both ends are bent in opposite directions) or S-shape so that the sub-cone (72) can vibrate along the central axis while maintaining the center.

In addition, since the balance member (70) must be vibrated by the vibration plate (40) while supporting the vibration plate (40), it is preferable to make it of a non-magnetic or diamagnetic material that is not affected by magnetic force.

According to another embodiment of the present invention speaker 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 range of the diaphragm (40) and maintaining balance.

In addition, since the sub-cone (72) of the balance member (70) vibrates while being connected by several suspensions (73), the balance of the vibration plate (40) is maintained, and since the body (42) of the vibration plate (40) is driven while maintaining the center, vibration in the direction of the central axis of the vibration plate (40) is received, so that vibration stability is improved.

In addition, by radially providing several embossing projections (75) on the sub-cone (72) of the balance member (70), the strength of the sub-cone (72) can be reinforced, and thus, the rigidity of the vibration plate (40) can be maintained, thereby improving vibration stability through suppression of split vibration and reduction of distortion.

The above balance member (70) is described and illustrated as being provided only on one side of the vibrating plate (40), but it may also be provided on the upper and lower surfaces, i.e., on both sides, of the vibrating plate (40). If the balance member (70) is provided on both sides of the vibrating plate (40) in this way, it is possible to support more stably without the bias that may occur on one side of the vibrating plate (40) where the balance member (70) is not provided, and by reinforcing the strength, it is possible to achieve more stable high-pitched sound expansion and balancing.

FIG. 7 is a drawing illustrating another embodiment of a speaker with improved vibration stability according to the present invention. Here, the speaker includes an upper coil (20a), a lower coil (20b), an upper permanent magnet (30a), a lower permanent magnet (30b), a diaphragm (40), and a PCB (60), similar to the basic speaker of one embodiment. Reinforcing members (46) are provided on both sides of the diaphragm (40), and the reinforcing members (46) on both sides of the diaphragm (40) are supported by balance members (70) so that the diaphragm (40) vibrates together with the diaphragm (40).

According to another embodiment of the present invention speaker configured as described above, since reinforcing members (46) are provided on both sides of the diaphragm (40), the vibration generating portion of the diaphragm (40) can be moved more toward the center as desired by the designer, and the investment rate can be increased. In addition, since the diaphragm (40) vibrates while being supported by the balancing member (70) on both sides, the diaphragm (40) is supported more stably without being biased to one side, and the strength is reinforced, so that more stable high-pitched sound expansion and balancing can be achieved.

Figure 8 is a drawing illustrating 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) but protrudes more than the upper and lower surfaces of the upper permanent magnet (30a) so as to increase the alternating electromagnetic force and increase efficiency.

According to another embodiment of the present invention speaker configured as described above, the upper and lower coils (20a, 20b) are wound so as to protrude beyond the inner upper and lower surfaces of the upper and lower permanent magnets (30a, 30b) as well as the outer upper surface of the upper permanent magnet (30a) so as to have an air gap in a range that does not affect the vibration of the body (42) of the diaphragm (40), thereby increasing the AC electromagnetic force of the upper coil (20a), thereby increasing efficiency.

Although the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the specific embodiments described above, and various modifications may be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims. Furthermore, such modifications should not be individually understood from the technical idea or prospect of the present invention.

10: Housing 20a: Upper coil
20b: Lower coil 30a: Upper permanent magnet
30b: Upper permanent magnet 40: Vibrating plate
41: Edge 42: Body
43: Bridge 44: Bridge Cover
46: Reinforcing member 50: Stopper
60: PCB 70: Balance Absence
71: Outer support 72: Sub cone
73: Suspension 74: Central support
75: Embossed protrusion 431: Hole for bridge formation
441: Embossing groove 441: Central plate
442: Wings

Claims (9)

delete delete delete delete It includes upper and lower coils arranged in correspondence with each other, permanent magnets provided on the outside of the upper and lower coils, and a vibration plate provided with a stopper between the upper and lower coils.
One or both sides of the above diaphragm are supported by a balance member to maintain the balance of the diaphragm as well as to expand the high-pitched range of the diaphragm.
A speaker with improved vibration stability, characterized in that the balance member comprises a flat outer support portion provided on an outer periphery, a horn-shaped sub-cone protruding in the center of the outer support portion to support a central surface of a diaphragm, and several suspensions provided between the outer support portion and the sub-cone so that the sub-cone can vibrate along the central axis of the sub-cone while maintaining its center. delete In paragraph 5,
A speaker with improved vibration stability, characterized in that the sub-cone is provided with a hemispherical central support portion in the center so as to stably support the center of the diaphragm. In paragraph 5,
A speaker with improved vibration stability, characterized in that the sub-cone is provided with several embossing protrusions radially arranged on the cone-shaped portion outside the central support portion. In paragraph 5,
A speaker with improved vibration stability, characterized in that the upper coil inside the permanent magnet is wound thicker than the upper permanent magnet and protrudes further than the upper and lower surfaces of the upper permanent magnet so as to increase the alternating electromagnetic force and increase efficiency.

Images