Acoustic vibration device with ultra-thin structure

Abstract

Disclosed is an acoustic vibration device having an ultra-thin structure. The acoustic wave vibration device according to the present invention has an ultra-thin structure in which a magnet moves in accordance with the amount of current of an acoustic signal applied to a winding coil, and is characterized by comprising an upper cover and a lower cover having a cylindrical structure, the acoustic wave vibration device comprising: a magnet provided on the inner surface of the upper cover so as to be spaced apart from each other; the plate spring is used for fastening the magnet and the upper cover; and a winding coil provided below the magnet so as to be spaced apart from each other, the winding coil guiding the magnet to move up and down by forming a magnetic field corresponding to an acoustic signal by means of the magnet. Therefore, the present invention has the effect of improving usability of the acoustic vibration device by minimizing the thickness of the acoustic vibrator. Furthermore, the present invention provides an effect of strengthening the vibration force by guiding the vibration mode of the magnet for guiding the vibration corresponding to the acoustic wave signal to move up and down.

Description

Technical Field

[0001] The present invention relates to an acoustic wave vibration device, and more particularly, to an acoustic wave vibration device having an ultra-thin structure, which has an ultra-thin structure and guides the vibration of a magnet through vertical shaking, thereby increasing the efficiency of the acoustic wave vibration. Background Art

[0002] Due to the various stresses of daily life, people often suffer from various ailments such as muscle stiffness, chronic fatigue, and muscle spasms. In recent years, the number of people who receive massage to relieve muscle stiffness and nerve fatigue has continued to increase. Conventional massage involves applying pressure directly to certain parts of the body using hands or tools.

[0003] As the number of people seeking massages continues to increase, a variety of massage machines are being developed that utilize machines rather than humans to perform massages. Examples include massage chairs, calf massagers, and foot massagers. Typically, these massage machines utilize a vibration mechanism based on a motor or actuator. In recent years, heating pads with internal vibration mechanisms to achieve both heating and vibration guidance have been developed.

[0004] As shown in the attached authorized patent, the sonic vibration heating pad includes at least one electric heating plate and at least one sonic vibrator. The electric heating plate generates heat and the sonic vibrator vibrates. The sonic vibration heating pad vibrates using the sonic vibrator, rather than a motor. The sonic vibrator vibrates by applying current to a voice coil located within the magnetic field of a permanent magnet, thereby converting the sonic vibration into an up-and-down movement of the permanent magnet. The vibration generated by the sonic vibrator is transmitted to the user lying on the sonic vibration heating pad, relaxing the user's body and mind.

[0005] That is, Figure 1 As shown, the acoustic wave vibration heating pad 1 includes a cover 11, at least one electric heating plate 12, a temperature sensor 13, a backing plate 14, at least one silver foil vibrator 20, and a control box 15. The cover 11 is a rectangular shell with an open lower surface, and the electric heating plate 12, temperature sensor 13, backing plate 14, at least one acoustic wave vibrator 20, and control box 15 are arranged inside. The upper surface of the cover 11 that contacts the user's body can be made of artificial leather, natural leather, etc.

[0006] The heating plate 12 is formed into a rectangular flat plate that generates heat. It includes a heat wire embedded within the rectangular plate. A heat wire is an electrical wire that generates heat. Typically, the heating plate 12 is made of a metal with high thermal conductivity to smoothly transfer the heat generated by the heat wire. A temperature sensor 13 is located below the heating plate 12 to detect its temperature.

[0007] The pad 14 supports the body of the user. At least one sonic vibrator 20 is built into the pad 14. The pad 14 includes an upper pad 141 arranged between the electric heating plate 12 and the sonic vibrator 20 and a lower pad 142 surrounding the sonic vibrator 20. The upper pad 141 is formed in the shape of a rectangular flat plate and is located at the lower part of the electric heating plate 12. The lower pad 142 is formed in the center with at least one slot for inserting at least one sonic vibrator 20, and is formed in the shape of a rectangular flat plate. The lower pad 142 is located at the lower part of the upper pad 141. The lower pad 142 fixes the sonic vibrator 20 inserted into the center slot. The upper pad 141 and the lower pad 142 are made of materials such as polyurethane foam and expanded polypropylene (EPP).

[0008] However, the aforementioned conventional pads are equipped with multiple acoustic wave vibrators because the pads are supported on the ground due to their nature of use, and the acoustic wave vibrators are quite thick, making it difficult to install the acoustic wave vibrators in a pad or other plate form. In other words, it is necessary to improve the physical structure of the acoustic wave vibrators installed inside the pads to enhance usability.

[0009] Prior art literature

[0010] Patent Literature

[0011] Korean authorized patent No. 10-2179265, authorization date November 10, 2020, invention name "Sonic vibration heating pad using ultrasonic actuator". Summary of the Invention

[0012] The present invention is proposed to solve the above-mentioned problems. An object of the present invention is to provide an acoustic wave vibration device with an ultra-thin structure, which can minimize the thickness of the acoustic wave vibrator and improve the usability of the acoustic wave vibration device.

[0013] Another object of the present invention is to provide an acoustic wave vibration device having an ultra-thin structure that can strengthen the vibration force by guiding the vibration mode of a magnet for guiding vibration corresponding to an acoustic wave signal to move up and down.

[0014] The ultra-thin acoustic wave vibration device of the present invention for achieving the above-mentioned purpose is an ultra-thin acoustic wave vibration device that generates movement of the magnet according to the amount of current of the acoustic signal applied to the winding coil. It is characterized in that it is composed of an upper cover and a lower cover with prescribed shapes and corresponding to each other, and includes: a magnet, which is separated and arranged on the inner side surface of the above-mentioned upper cover; a leaf spring, which is used for fastening the above-mentioned magnet and the upper cover; and a winding coil, which is separated and arranged below the above-mentioned magnet, and the magnetic field corresponding to the acoustic signal is formed by the above-mentioned magnet to guide the up and down movement of the above-mentioned magnet.

[0015] Furthermore, the present invention is characterized in that the cross section of the magnet has a circular or polygonal structure, and the wound coil is wound into a circular or polygonal structure so as to correspond to the magnet.

[0016] Furthermore, the present invention is characterized in that the winding coil is a spiral coil having a planar spiral structure so as to be wound horizontally with the magnet.

[0017] Furthermore, the present invention is characterized in that the coil resistance of the wound coil is 4 ohms or 8 ohms, and the coil is wound in a manner corresponding to the diameter of the magnet.

[0018] Furthermore, the present invention is characterized in that the leaf spring includes a pressing protrusion protruding toward the inner side surface, and when the magnet is introduced and fixed, the pressing protrusion is bent in a vertical direction to apply pressure to the side surface of the magnet to fix it.

[0019] Furthermore, the present invention is characterized in that the leaf spring is formed into an annular structure so that the magnet can be introduced into the interior, a steel bar for guiding the specified elastic force is extended from the outer side of the annular structure, and a fixing groove for fastening to the upper cover is provided at the end of the steel bar.

[0020] Furthermore, the present invention is characterized in that the weight of the magnet 231 and the transverse elastic coefficient G of the leaf spring 241 are proportional to each other. When the weight of the magnet 231 is 60 g to 80 g, the transverse elastic coefficient G of the leaf spring 241 is designed to be 60×10 3 N / mm 2 to 70×10 3 N / mm 2 .

[0021] The ultra-thin acoustic wave vibration device disclosed in the present invention has the following advantages: the thickness of the acoustic wave vibrator can be minimized, thereby improving the usability of the acoustic wave vibration device. Furthermore, the present invention provides the following advantages: the vibration force can be enhanced by guiding the vibration mode of the magnet used to guide the vibration corresponding to the acoustic wave signal to move up and down. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a diagram for explaining the structure of a pad on which a conventional acoustic wave vibrator is mounted.

[0023] Figure 2 It is a perspective view for explaining the acoustic wave vibration device with an ultra-thin structure of the present invention.

[0024] Figure 3 This is a structural diagram showing a cross-sectional view of the acoustic wave vibration device having an ultra-thin structure according to the present invention.

[0025] Figure 4This is an exploded perspective view of the acoustic wave vibration device with an ultra-thin structure of the present invention.

[0026] Figure 5 It is a cross-sectional view for explaining the operation of the present invention.

[0027] Description of Reference Signs

[0028] 200: Outer cover 211: Upper cover

[0029] 213: Lower cover 215: Fastening groove

[0030] 221: Winding coil 231: Magnet

[0031] 241: Leaf spring 243: Pressurizing protrusion

[0032] 245: Fixed slot 247: Steel bar DETAILED DESCRIPTION

[0033] Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

[0034] Figure 2 This is a perspective view illustrating the ultra-thin acoustic wave vibration device of the present invention. As shown, a magnet and a coil are wound within a housing 200 having a predetermined shape. The magnet is designed to be located above the coil and secured to a predetermined elastic member, allowing for smooth vertical movement.

[0035] The outer cover 200 may be made of metal or polycarbonate. Preferably, the magnet is a neodymium magnet that can increase magnetic strength. The magnet is in a polygonal shape, including a circular shape. The coil is wound to correspond to the shape of the magnet.

[0036] Furthermore, the elastic body is made of 65% manganese, which can provide resilience to the vibration force of the magnet. The elastic body needs to minimize the influence of the magnet's magnetic force and maintain its elasticity without being affected by the magnetic force.

[0037] Figure 3 The figure shows a cross-sectional view of the ultra-thin acoustic wave vibration device of the present invention. As shown in the figure, the housing 200 is composed of an upper cover 211 and a lower cover 213, and includes: a magnet 231 spaced apart from the inner side of the upper cover 211; a leaf spring 241 for fastening the magnet 231 to the upper cover 211; and a wound coil 221 spaced apart below the magnet 231. The magnet 231 generates a magnetic field corresponding to the acoustic signal to guide the upward and downward movement of the magnet 231.

[0038] The cross-section of the magnet 231 can be formed into a circular structure, or a polygonal structure including a quadrilateral structure. Accordingly, the coil 221 is also wound into a circular or polygonal shape corresponding to the structure of the magnet 231, so that the magnetic force induced by the coil 221 is fully directed toward the magnet 231.

[0039] Furthermore, the winding coil 221 is wound horizontally with the magnet 231. The winding coil 221 has a spiral coil structure with a flat spiral shape, and the coil resistance is maintained at 4 ohms or 8 ohms. The winding coil 221 is wound horizontally in a manner corresponding to the magnetic field area of the magnet 231. In the embodiment of the present invention, the diameter of the magnet 231 is 50 mm, and the winding diameter of the winding coil 221 is also close to 50 mm. The winding coil 221 can be wound once, or two or three times, depending on the coil resistance and the coil diameter.

[0040] Figure 4 This is an exploded perspective view of the ultra-thin acoustic wave vibration device of the present invention. As shown, the coil 221 is wound horizontally along the upper end of the lower cover 213. The magnet 231 is guided and fixed to the inner circumference of a leaf spring 241. A pressure protrusion 243 protruding from the inner side of the leaf spring 241 secures the magnet 231. The pressure protrusion 243 bends vertically and applies pressure to the side of the magnet 231, securing it.

[0041] During the production of the leaf spring 241 , after the magnet 231 and the leaf spring 241 are overlapped, the leaf spring 241 is pressurized by a press machine, thereby forcibly inserting and combining the magnet 231 along the inner circumference of the leaf spring 241 . During this process, the pressurizing protrusion 243 will bend.

[0042] The leaf spring 241 has an annular structure to accommodate the magnet 231. A steel bar 247 extends along the outer side of the annular structure, with a fixing slot 245 provided at the end of the steel bar 247. The steel bar 247 guides the vertical vibration of the leaf spring 241. The length of the steel bar 247 is determined inversely proportional to the weight of the magnet 231 or proportional to the elastic strength of the leaf spring 241.

[0043] When the weight of the magnet 231 is large, the length of the steel bar 247 is shortened, thereby adjusting the vibration force based on the weight of the magnet 231. Furthermore, when the elastic strength of the leaf spring 241 is high, the length of the steel bar 247 is increased to impart a vibration force to the magnet 231, thereby imparting a smooth vibration force to the magnet 231.

[0044] The current applied to the coil 221 generates magnetic lines of force around the coil 221. These lines of force and the magnetic field of the magnet 231 cause the magnet 231 to move up and down. As the leaf spring 241 secures the upper cover 211 and the magnet 231, the vertical movement of the magnet 231 causes the steel bars 247 to vibrate. This vibrational force from the leaf spring 241 is transmitted to the upper cover 211, allowing the user to experience the vibration of the magnet 231 in response to the acoustic signal.

[0045] Therefore, this vibration force utilizes the weight of the magnet 231 and the elasticity of the leaf spring 241 to amplify the vibration force of the magnet 231. The amplification of the vibration force will vary depending on the material of the leaf spring 241 and the length of the steel bar 247. For example, when the elastic constant of the leaf spring 241 is extremely high or the steel bar 247 is short, the vibration force of the magnet 231 is directly transmitted to the upper cover 211 through the steel bar 247 of the leaf spring 241.

[0046] Specifically, when the subtle vibrations of magnet 231 are transmitted to upper cover 211, the amplitude of the vibration wave generated by the vibration force is low, thereby reducing the user experience. Conversely, if the hardness of leaf spring 241 is extremely low or if steel bar 247 is very long, the vibration force of magnet 231 is absorbed by leaf spring 241 and cannot be transmitted to upper cover 211, thereby reducing the user experience.

[0047] In the present invention, the diameter of the magnet 231 is 50 mm, the thickness is 5 mm, and the weight is 70 g. The corresponding leaf spring 241 is a leaf spring made of 65 Mn material, and the transverse elastic coefficient G is 60×10 3 N / mm 2 to 70×10 3 N / mm 2 Furthermore, the steel bars 247 are formed in four pieces and have a protruding length of 0.3×π×R to 0.4×π×R relative to the radius R of the magnet 231 .

[0048] The weight of the magnet 231 used in the present invention is approximately 70g. This is because the magnet material such as ferrite, superferrite, or neodymium magnet can be used. Therefore, regardless of the material of the magnet, the transverse elastic coefficient G of the leaf spring 241 is determined according to the weight of the magnet. Therefore, when the weight of the magnet 231 is 60g to 80g, the transverse elastic coefficient G of the leaf spring 241 should be designed to be 60×10 3 N / mm 2 to 70×10 3 N / mm 2 .

[0049] Meanwhile, the magnet 231 is fixed along the inner circumference of the leaf spring 241 and is screwed to the upper cover 211 via a fixing groove 245 formed at the end of the reinforcing bar 247. Furthermore, the magnet 231 is spaced approximately 3 to 5 mm from the wound coil 221 to ensure a sufficient space for the vibration amplitude of the magnet 231.

[0050] Figure 5 The following are cross-sectional views illustrating the operation of the present invention. As shown in part (a), in the wound coil 221, when current flows counterclockwise on a plane, the left coil generates a counterclockwise magnetic field, while the right coil generates a clockwise magnetic field. In response, the lower end of the magnet 231 is an N pole, and the upper end is an S pole, causing the magnet 231 to generate an upward repulsive force. Conversely, as shown in part (b), when the direction of the current flowing through the wound coil 221 changes, the magnetic lines of force of the coil on the left side in the cross-sectional view are generated clockwise in the direction of the figure, while those of the coil on the right side are generated counterclockwise in the direction of the figure. As the magnet 231 maintains its N pole downward in the figure, an attractive force acts between the wound coil 221 and the magnet 231. As described above, as the magnet 231 vibrates in the vertical direction in response to the acoustic signal applied to the wound coil 221, a vibration force based on the acoustic signal is generated.

Claims

1. An acoustic wave vibration device having an ultra-thin structure, wherein the movement of a magnet occurs according to the amount of current of an acoustic signal applied to a winding coil, characterized in that: The invention is composed of an upper cover (211) and a lower cover (213) having a prescribed shape, and includes: A magnet (231) is provided on the inner side surface of the upper cover (211) in a spaced manner; a leaf spring (241) for fastening the magnet (231) and the upper cover (211); and The winding coil (221) is spaced apart and arranged below the magnet (231), and forms a magnetic field corresponding to the acoustic signal through the magnet (231) to guide the up and down movement of the magnet (231).

2. The acoustic wave vibration device with an ultra-thin structure according to claim 1, characterized in that: The cross section of the magnet (231) has a circular or polygonal structure, and the winding coil (221) is wound into a circular or polygonal structure so as to correspond to the magnet (231).

3. The acoustic wave vibration device with an ultra-thin structure according to claim 1, characterized in that: The winding coil (221) is a spiral coil with a planar spiral structure so as to be wound horizontally with the magnet (231).

4. The acoustic wave vibration device with an ultra-thin structure according to claim 3, characterized in that: The coil resistance of the winding coil (221) is 4 ohms or 8 ohms, and the winding coil (221) is wound in a manner corresponding to the diameter of the magnet (231).

5. The acoustic wave vibration device with an ultra-thin structure according to claim 1, characterized in that: The leaf spring (241) includes a pressure protrusion (243) protruding toward the inner side. When the magnet (231) is introduced and fixed, the pressure protrusion (243) is bent in a vertical direction to apply pressure to the side of the magnet (231) to fix it.

6. The acoustic wave vibration device with an ultra-thin structure according to claim 1, characterized in that: The leaf spring (241) is formed into an annular structure so that the magnet (231) can be introduced into the interior. A steel bar (247) for guiding a specified elastic force is extended from the outer side of the annular structure. A fixing groove (245) for fastening to the upper cover (211) is provided at the end of the steel bar (247).

7. The acoustic wave vibration device with an ultra-thin structure according to any one of claims 1 to 6, characterized in that: The weight of the magnet (231) and the transverse elastic coefficient (G) of the leaf spring (241) are proportional to each other. When the weight of the magnet (231) is 60 g to 80 g, the transverse elastic coefficient (G) of the leaf spring (241) is designed to be 60×10 3 N / mm 2 to 70×10 3 N / mm 2 .

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