Power generation device that improves efficiency by using resonance

Abstract

To provide a power generation device that improves efficiency by using the vibration generated by resonance to generate electricity.SOLUTION: The power generation device with improved efficiency using resonance includes a piezoelectric unit 20 that includes a cylindrical base unit 10 and at least one piezoelectric element that is arranged on the outer surface of the base unit and generates electricity from the vibrations generated by the base unit. The base unit is open on one side and closed on the other side by a cover unit 110.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a power generating device that utilizes resonance to improve efficiency. [Background technology]

[0002] Recently, there has been growing interest in environmentally friendly renewable energy technologies.

[0003] Among renewable energy technologies, power generation technology using vibration has recently been the subject of active research and development. Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide a power generating device that generates electricity by utilizing vibrations caused by resonance. [Means for solving the problem]

[0005] In order to achieve the above object, the present invention provides a power generating device with improved efficiency using resonance, comprising a cylindrical base part and a piezoelectric part including at least one piezoelectric element disposed on an outer surface of the base part and configured to generate electricity from vibrations generated by the base part.

[0006] The base part may include a metal material, the base part may have one side open and the other side closed, and the base part may further include a cover part closing the other side of the base part, the cover part may include a protruding portion.

[0007] The cover portion may include the same material as the base portion. The cover portion may be connected to the other of the base portion by welding or the like. The cover portion and the base portion may be integrally formed to form a single body. The cover portion may have a hemispherical shape.

[0008] The power generating device may further include a pillar part connected to a center portion of the cover part, the pillar part being connected to a support. A first hole is formed in the center portion of the cover part, and the pillar part may include a portion that supports the cover part and is inserted into the first hole. The cover part may further include a buffer part including a portion located on a side wall of the first hole.

[0009] The cushioning portion may include a material that is softer than the cover portion.

[0010] The base portion may have at least one flat surface on an outer surface thereof, and the piezoelectric portion may be disposed on the flat surface. A curved surface may be disposed between the flat surface and one side of the base portion in a longitudinal direction of the base portion.

[0011] The power generating device may further include a vibration generating means for generating vibration of the base portion by applying at least one of friction and impact to the curved surface. A portion of the vibration generating means that comes into contact with the curved surface may include a material that is softer than the base portion.

[0012] The portion of the vibration generating means that comes into contact with the bending surface may include leather, urethane, rubber, PC (Poly Carbonate) and / or synthetic resin material.

[0013] The base portion may have a constant wall thickness in the area corresponding to the bending surface.

[0014] A wall thickness of the base portion in a region corresponding to the bent surface may be greater than a maximum wall thickness of the base portion in a region corresponding to the flat surface, and an average wall thickness of the base portion in the region corresponding to the flat surface may be less than a wall thickness of the base portion in a region corresponding between two flat surfaces.

[0015] In a region corresponding to the flat surface, the base portion may have a variable wall thickness. The base portion may have a minimum wall thickness in a circumferential direction at a portion corresponding to a centre of the flat surface.

[0016] The curved surface may have a plurality of protrusions each having a convex shape. The curved surface may have a smooth surface.

[0017] The flat surface may have a length in a longitudinal direction of the base portion that is greater than a width in a circumferential direction of the base portion. The piezoelectric portion may have a length in a longitudinal direction that is greater than a width in the circumferential direction. An adhesive layer may be disposed between the flat surface and the piezoelectric portion for attaching the piezoelectric portion to the base portion. The adhesive layer may include an epoxy material.

[0018] The flat surface may have a recess having a concave shape, the recess including a portion extending in a longitudinal direction of the base, and the piezoelectric portion may be disposed within the recess. A minimum thickness of the base may be smaller than an average depth of the recess. A length of the recess in the longitudinal direction of the base may be shorter than a length of the flat surface.

[0019] A ratio of an inner diameter of the base portion to a length of the base portion may be 1:0.5 to 1:2, and a ratio of an inner diameter of the base portion to an average wall thickness of the base portion may be 200:1 to 5:1. The power generating device may further include a protective layer covering the piezoelectric portion disposed in the recess.

[0020] Another power generating device using resonance to improve efficiency according to the present invention includes a cylindrical first base part, a cylindrical second base part, and a piezoelectric part. The piezoelectric part includes at least one piezoelectric element disposed on an outer surface of the first base part and the second base part, respectively, and generates electricity by vibration generated by the first base part or the second base part.

[0021] The first base part and the second base part have one side open and the other side closed, and further include a first cover part closing the other side of the first base part and a second cover part closing the other side of the second base part. One side of the first base part and one side of the second base part may face each other.

[0022] The power generating device further includes a first pillar part having one end connected to a center part of the first cover part, a first supporting part to which the other end of the first pillar part is connected, a second pillar part having one end connected to the center part of the second cover part, and a second supporting part to which the other end of the second pillar part is connected. The first supporting part may be located on the ground, and the second supporting part may be disposed on an upper part of the first supporting part. Effect of the Invention

[0023] The power generating device according to the present invention can achieve high power generation efficiency by applying the principle of resonance even when a piezoelectric element is used as an element for producing electricity. [Brief description of the drawings]

[0024] [Figure 1] 3A to 3C are diagrams for explaining in detail the configuration of a power generating device whose efficiency is improved by utilizing resonance according to the present invention, and a base portion and a piezoelectric portion of the power generating device according to the present invention. [Diagram 2] 5A to 5C are diagrams for explaining in detail a base portion and a piezoelectric portion of the power generating device according to the present invention. [Diagram 3] 5A to 5C are diagrams for explaining in detail a base portion and a piezoelectric portion of the power generating device according to the present invention. [Figure 4] 5A to 5C are diagrams for explaining in detail a base portion and a piezoelectric portion of the power generating device according to the present invention. [Diagram 5]5A to 5C are diagrams for explaining in detail a base portion and a piezoelectric portion of the power generating device according to the present invention. [Figure 6] 5A to 5C are diagrams for explaining in detail a base portion and a piezoelectric portion of the power generating device according to the present invention. [Figure 7] 5A to 5C are diagrams for explaining in detail a base portion and a piezoelectric portion of the power generating device according to the present invention. [Figure 8] 5A to 5C are diagrams for explaining in detail a base portion and a piezoelectric portion of the power generating device according to the present invention. [Figure 9] 5A to 5C are diagrams for explaining in detail a base portion and a piezoelectric portion of the power generating device according to the present invention. [Figure 10] 5A to 5C are diagrams for explaining in detail a base portion and a piezoelectric portion of the power generating device according to the present invention. [Figure 11] 5A to 5C are diagrams for explaining in detail a base portion and a piezoelectric portion of the power generating device according to the present invention. [Figure 12] 5A to 5C are diagrams for explaining in detail a base portion and a piezoelectric portion of the power generating device according to the present invention. [Figure 13] FIG. 2 is a diagram for explaining in detail the vibration generating means and related parts of the power generating device according to the present invention. [Figure 14] FIG. 2 is a diagram for explaining in detail the vibration generating means and related parts of the power generating device according to the present invention. [Figure 15] 4 is a diagram for explaining in detail the cover, the column and related parts of the power generating device according to the present invention. FIG. [Figure 16] 4 is a diagram for explaining in detail the cover, the column and related parts of the power generating device according to the present invention. FIG. [Figure 17] 10 is a diagram for explaining another configuration of a power generating device in which efficiency is improved by utilizing resonance according to the present invention. FIG. [Figure 18] 10 is a diagram for explaining another configuration of a power generating device in which efficiency is improved by utilizing resonance according to the present invention. FIG. [Figure 19] 10 is a diagram for explaining another configuration of a power generating device in which efficiency is improved by utilizing resonance according to the present invention. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] In order to describe the present disclosure, its operational advantages, and the objectives achieved by the embodiments of the present disclosure, preferred embodiments of the present disclosure will now be described and discussed with reference to the preferred embodiments.

[0026] In this application, the terms "comprise" or "have" and the like are intended to specify the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are to be understood as not precluding the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0027] In the description of the present disclosure, if it is determined that a specific description of a known function or configuration related to the present disclosure may unnecessarily obscure the gist of the present disclosure, the detailed description will be omitted. Hereinafter, an embodiment of a power generation device according to the present invention will be described in detail with reference to the accompanying drawings.

[0028] FIG. 1 is a diagram for explaining the configuration of a power generating device in which efficiency is improved by utilizing resonance according to the present invention.

[0029] 1, a power generating device (10S, hereinafter referred to as "power generating device") with improved efficiency using resonance according to the present invention may include a base part (10) and a piezoelectric part (20). In addition, the power generating device 10S may further include at least one of vibration generating means (30), a driver (40) or an arm part (50).

[0030] The base portion 10 may have a cylindrical shape. The base portion 10 may include any material capable of generating vibrations. Preferably, the base portion 10 may include a metal material such as aluminum, copper, or the like.

[0031] The piezoelectric unit 20 may be disposed on the outer surface of the base unit 10. The piezoelectric unit 20 may include at least one piezoelectric element that generates electricity from vibrations generated by the base unit 10. The vibration generating means 30 can generate vibrations in the base unit 10 by applying at least one of friction and impact.

[0032] The arm portion 50 can drive the vibration generating means 30 according to the control of the drive portion 40 . The driving unit 40 can control the arm unit 50 to apply friction and / or impact to the base unit 10. The driving unit 40 can store electricity generated by the piezoelectric unit 20 or supply it to a system by utilizing the vibration of the base unit 10. To this end, the driving unit 40 can receive electricity transmitted from the piezoelectric unit 20 via a power line PL or can be supplied with power from a separate power supply source.

[0033] An identification code IS not shown in FIG. 1 can represent an inner side surface (Inner Side Surface) corresponding to the outer side surface (OS) of the base portion 10.

[0034] When the vibration generating means 30 applies impact and / or friction to the base part 10, the base part 10 may vibrate. Here, the base part 10 can resonate in response to the vibration frequency. This allows the vibration of the base part 10 to gradually weaken and be maintained for a sufficiently long time without disappearing in a short time.

[0035] This increases the amount of electricity that the piezoelectric unit 20 produces by utilizing the vibration of the base unit 10. The driving unit 40 then receives the electricity generated by the piezoelectric unit 20 and stores it or supplies it to another system.

[0036] Each component of the power generating device 10S according to the present invention will be described in more detail below.

[0037] 2 to 12 are diagrams for explaining the base portion and the piezoelectric portion in detail. In the following, the explanation of the parts explained in detail above can be omitted.

[0038] 2, the base part 10 may have a cylindrical shape with one side E1 open and the other side E2 closed. For this purpose, the power generating device 10S according to the present invention may further include a cover part (10) that closes the other side E2 of the base part 10.

[0039] The cover part 110 may include a portion that protrudes convexly in a longitudinal direction (DR1) of the base part 10. The cover part 110 may include the same material as the base part 10. The cover part 110 may be connected to the other side E2 of the base part 10. Alternatively, the cover part 110 and the base part 10 may be integrally formed to form a single body. The cover part 110 may have a hemispherical shape.

[0040] The power generating device 10S according to the present invention may further include a pillar part 120. One side of the pillar part 120 may be connected to a central part of the cover part 110. The other side of the pillar part 120 may be connected to a support (not shown).

[0041] In order for the base portion 10 to resonate effectively and sufficiently in response to the vibration frequency, the inner diameter R1 of the base portion 10, the length D3 of the base portion 10, and the average wall thickness (D2) of the base portion 10 can be appropriately adjusted.

[0042] Preferably, the ratio of the inner diameter R1 of the base portion 10 to the length D3 of the base portion 10 in the longitudinal direction DR1 may be 1:0.5 to 1:2. More preferably, the ratio of the inner diameter R1 of the base portion 10 to the length D3 of the base portion 10 in the longitudinal direction DR1 may be 1:0.8 to 1:3.

[0043] Preferably, the ratio of the inner diameter R1 of the base portion 10 to the average wall thickness D2 of the base portion 10 can be 200:1 to 5:1. More preferably, the ratio of the inner diameter R1 of the base portion 10 to the average wall thickness D2 of the base portion 10 can be 100:1 to 20:1.

[0044] A plurality of piezoelectric parts 20 may be arranged on the outer surface of the base part 10 in a circumferential direction (R2) of the base part 10. In a longitudinal direction DR1 of the base part 10, the piezoelectric parts 20 may be spaced apart from one side E1 of the base part 10 by a predetermined distance D1.

[0045] In the longitudinal direction DR1 of the base portion 10, a bending surface CS may be located between the piezoelectric portion 20 and one side E1 of the base portion 10. In addition, in the longitudinal direction DR1 of the base portion 10, the piezoelectric portion 20 and the other side E2 of the base portion 10 may be spaced apart by a predetermined distance D1a.

[0046] In the longitudinal direction DR1 of the base portion 10, another bending surface CS1 may be located between the piezoelectric portion 20 and the other side E2 of the base portion 10. In the longitudinal direction DR1 of the base portion 10, the distance D1 between the piezoelectric portion 20 and one side E1 of the base portion 10 may be larger than the distance D1a between the piezoelectric portion 20 and the other side (E2) of the base portion 10.

[0047] 3, the base portion 10 may have at least one flat surface on the outer surface OS. A plurality of flat surfaces FS may be arranged in the circumferential direction DR2 of the base portion 10 on the outer surface of the base portion 10. The piezoelectric portion 20 may be arranged on the flat surface FS.

[0048] In this case, the curved surface CS may be located between the flat surface FS and one side E1 of the base portion 10 in the longitudinal direction DR1 of the base portion 10. The curved surface CS may have a smooth surface.

[0049] The flat surface FS may have a length D4 in the longitudinal direction DR1 of the base portion 10 that is greater than a width D5 in the circumferential direction DR2 of the base portion 10. The piezoelectric portion 20 may have a length D6 in the longitudinal direction DR1 that is greater than a width D7 in the circumferential direction DR2.

[0050] An adhesive layer 20 may be disposed between the flat surface FS and the piezoelectric portion 20 for attaching the piezoelectric portion 20 to the base portion 10. The adhesive layer 200 may include an epoxy material. The adhesive layer 200 may allow the piezoelectric portion 20 to be fixed to the flat surface FS.

[0051] A cut view of the base portion 10 taken along line A1-A2 corresponding to the bending surface CS is shown in Fig. 4(A). Looking at Fig. 4(A), in the region corresponding to the bending surface CS, the base portion 10 can have a constant wall thickness D8.

[0052] Also, a cut view of the base portion 10 taken along line A3-A4 corresponding to the flat surface FS is shown in Fig. 4(B) . Looking at Fig. 4(B), in the region corresponding to the flat surface FS, the base portion 10 can have a variable wall thickness.

[0053] In the region corresponding to the flat surface FS, the base portion 10 may have a minimum wall thickness D9 at a portion corresponding to the center of the flat surface FS in the radial direction DR2. Also, in the region corresponding to the flat surface FS, the average wall thickness of the base portion 10 may be even thinner than the wall thickness D10 of the base portion 10 in the region corresponding to between the two flat surfaces FS.

[0054] 5(A), the wall thickness D10 of the base portion 10 in the region corresponding to the space between the two flat surfaces FS is the same as the wall thickness (D8) of the base portion 10 in the region corresponding to the bent surface CS. Looking at FIG. 5(B), the wall thickness D8 of the base portion 10 in the region corresponding to the bent surface CS is the maximum in the region corresponding to the flat surface FS of the base portion 10. It is thicker than the wall thickness (D10).

[0055] 6, another bending surface CS2 may be located between two piezoelectric portions 20 adjacent in the circumferential direction DR2 of the base portion 10. The base portion 10 may have a constant wall thickness D11 in a region corresponding to the another bending surface CS2.

[0056] A width D12 of the other bent surface CS2 in the circumferential direction DR2 of the base portion 10 may be smaller than a width D13 of the flat surface FS. From another perspective, an angle θ2 corresponding to the other bent surface CS2 with respect to the center of the base portion 10 may be smaller than an angle θ1 corresponding to the flat surface FS.

[0057] Looking at FIG. 7(A), a wall thickness D11 of the base portion 10 corresponding to another bending surface CS2 may be smaller than the wall thickness (D8) of the base portion 10 in the region corresponding to the bending surface CS. 7B, unlike the case of FIG. 6A, the width D15 of the further bent surface CS2 in the circumferential direction DR2 of the base portion 10 may be larger than the width D14 of the flat surface FS.

[0058] From another perspective, the angle θ4 corresponding to the other bending surface CS2 with respect to the center of the base portion 10 may be larger than the angle θ3 corresponding to the flat surface FS. In this case, the adhesive layer 200 can correspond to the flat surface FS in the first region AR1, and correspond to the other bending surface CS2 in the second regions AR2 located on both sides of the first region AR1. The piezoelectric portion 20 can also correspond to the flat surface FS in the first region AR1, and correspond to the other bending surface CS2 in the second region AR2.

[0059] 8, the other bent surface CS1 may be omitted between the flat surface FS and the other side E2 of the base portion 10 in the longitudinal direction DR1. In this case, the flat surface FS may be adjacent to the cover portion 110.

[0060] 9, a plurality of convex projections 130 can be arranged on the curved surface CS of the base portion 10. In this case, the area of ​​the contact surface of the base portion 10 with the vibration generating means 30 can be increased.

[0061] 10, the bending surface CS of the base portion 10 may include a plurality of grooves 140 extending in the longitudinal direction DR1 and recessed to a predetermined depth. A peak 141 extending in the longitudinal direction DR1 may be disposed between two adjacent grooves 140. The diameter of the base portion 10 in the region corresponding to the groove 140 may be smaller than the diameter of the base portion 10 in the region corresponding to the peak 141.

[0062] 11, a recessed portion 150 having a concave shape may be formed on the flat surface FS of the base portion 10. The recessed portion 150 may include a portion extending in the longitudinal direction DR1 of the base portion 10.

[0063] Another flat surface FS1 may be formed in the recess 150. The piezoelectric portion 20 may be disposed on the other flat surface FS1 in the recess 150. A length D16 of the recess 150 in the longitudinal direction DR1 of the base portion 10 may be smaller than a length D4 of the flat surface FS.

[0064] The width D17 of the recess 150 in the circumferential direction DR2 of the base portion 10 may be smaller than the width D5 of the flat surface FS. The piezoelectric portion 20 may correspond to a portion of the base portion 10 having a minimum wall thickness D9. In this case, the base portion 10 can be more easily resonated.

[0065] 12(A), the width D17 of the recess 150 in the circumferential direction DR2 of the base portion 10 may be greater than the interval D18 between two adjacent recesses 150. The minimum thickness D9 of the base portion 10 may be less than the average depth D19 of the recess 150.

[0066] 12B, the power generating device 10S according to the present invention may further include a protective layer 210 covering the piezoelectric portion 20 disposed within the recessed portion 150. As shown in FIG.

[0067] 13 and 14 are diagrams for explaining in detail the vibration generating means and related parts of the power generating device according to the present invention. In the following, the explanation of the parts explained in detail above may be omitted.

[0068] 13, the vibration generating means 30 can apply at least one of friction and impact to the curved surface CS of the base part 10 to generate vibration of the base part 10. For example, the vibration generating means 30 can rotate or reciprocate along the curved surface CS of the base part 10 while in contact with the curved surface CS.

[0069] For more effective vibration generation, the portion 300 of the vibration generating means 30 that comes into contact with the bending surface CS may include a material that is softer than the base portion 10. The portion 300 of the vibration generating means 30 that comes into contact with the bending surface CS may include a leather material, a urethane material, a rubber material, a PC (Poly Carbonate) material, and / or a synthetic resin material.

[0070] A plurality of vibration generating means 30 can be applied to one base unit 10. For example, as shown in FIG. 14, a first sub-vibration generating means 30S1 and a second sub-vibration generating means 30S2 can be applied corresponding to one base unit 10. The arm unit 500 can include a first sub-arm unit 50S1, a second sub-arm unit 50S2, and a rotating unit 500.

[0071] One end of the first sub-arm 50S1 is connected to the first sub-vibration generating means 30S1, and one end of the second sub-arm 50S2 is connected to the second sub-vibration generating means 30S2. The other end of the first sub-arm 50S1 and the other end of the second sub-arm 50S2 may be connected to the rotating unit 500. The base unit 10 may be disposed between the first sub-arm 50S1 and the second sub-arm 50S2.

[0072] The rotation means 500 can rotate in a state in which the first sub-arm 50S1 and the second sub-arm 50S2 are in contact with the bending surface CS of the base portion 10. In this case, the base portion 10 can generate vibrations by the first sub-arm 50S1 and the second sub-arm 50S2.

[0073] 15 and 16 are diagrams for explaining in detail the cover, the pillars and the parts related thereto of the power generating device according to the present invention. In the following, the explanation of the parts explained in detail above may be omitted.

[0074] 15(A), the other end of the pillar 120 may be connected to the support 60. As shown in FIG 15(B), a first hole (H1) may be formed in the center of the cover 110. The pillar 120 may include a portion that supports the cover 110 and is inserted into the first hole H1.

[0075] 16, the power generator 10S according to the present invention may further include a buffer part 111 including a portion located on a side wall of the first hole H1. The buffer part 111 may include a material softer than the cover part 110. For example, the buffer part 111 may include a rubber material, a synthetic resin material, and / or a plastic material.

[0076] A screw line may be formed on a surface of the buffer part 111. The pillar part 120 may include a pillar body part 121, a first part 122 having a screw line formed thereon, and a nut part 123 fastened to the first part 122.

[0077] The first portion 122 of the column portion 120 can be inserted into the first hole H1 while engaging with the threads of the buffer portion 111. In this case, the base portion 10 can be vibrated more effectively.

[0078] 17 to 19 are diagrams for explaining still another configuration of a power generating device in which efficiency is improved by utilizing resonance according to the present invention. In the following, the description of the parts that have been described in detail above may be omitted.

[0079] Referring to FIG. 17, another power generating device 10S1 according to the present invention may include a first base part (10A), a second base part (10B), a piezoelectric part 20, a first cover part (110A) and a second cover part (110B).

[0080] The first base portion 10A and the second base portion 10B may each have a cylindrical shape. The piezoelectric portion 20 may include at least one piezoelectric element disposed on an outer surface of the first base portion 10A and the second base portion 10B, respectively, and generating electricity from vibrations generated by the first base portion 10A or the second base portion 10B.

[0081] The first base portion 10A and the second base portion 10B each have one side E1 open and the other side E2 closed. The first cover portion 110A can close the other side E2 of the first base portion 10A, and the second cover portion 110B can close the other side E2 of the second base portion 10B. Here, the one side E1 of the first base portion 10A and the one side E1 of the second base portion 10B can face each other.

[0082] Another power generating device 10S1 according to the present invention may further include a first pillar part (120A), a first supporting part (60A), a second pillar part (120B), and a second supporting part (60B).

[0083] One end of the first pillar portion 120A may be connected to the center portion of the first cover portion 110A. The other end of the first pillar portion 120A may be connected to the first support base 60A. One end of the second pillar portion 120B may be connected to the center portion of the second cover portion 110B. The other end of the second pillar portion 120B is connected to the second support base 60B.

[0084] Here, the first support stand 60A may be located on the ground, and the second support stand 60B may be located on the top of the first support stand 60A. A 1-1 sub-vibration generating means 30AS1 and a 2-1 sub-vibration generating means 30AS2 may be applied to the first base unit 10A.

[0085] The first-second sub-vibration generating means 30BS1 and the second-second sub-vibration generating means 30BS2 can be applied to the second base portion 10B. In this case, the vibration generated in the first base portion 10A can be transmitted to the second base portion 10B to amplify the vibration of the second base portion 10B.

[0086] In addition, the vibration generated in the second base portion 10B can be transmitted to the first base portion 10A to amplify the vibration of the first base portion 10A. The distance D20 between the first base portion 10A and the second base portion 10B may be shorter than the lengths D1A and D1B of the bending surface CS in the longitudinal direction DR1 of the first base portion 10A and the second base portion 10B.

[0087] 18, the 1-1 sub-vibration generating means 30AS1 can perform a reciprocating motion while in contact with the curved surface CS of the first base part 10A in the third area AR3. The 2-1 sub-vibration generating means 30AS2 can perform a reciprocating motion while in contact with the curved surface CS of the first base part 10A in the fourth area AR4.

[0088] In this manner, the 1-1 sub-vibration generating means 30AS1 and the 2-1 sub-vibration generating means 30AS2 can generate vibrations by applying friction to the curved surface CS of the first base portion 10A.

[0089] The 1-2 sub-vibration generating means 30BS1 can perform a reciprocating motion while in contact with the bending surface CS of the second base part 10B in the fifth area AR5. The 2-2 sub-vibration generating means 30BS2 can perform a reciprocating motion while in contact with the bending surface CS of the second base part 10B in the sixth area AR6.

[0090] In this manner, the first-second sub-vibration generating means 30BS1 and the second-second sub-vibration generating means 30BS2 can generate vibrations by applying friction to the curved surface CS of the second base portion 10B.

[0091] Referring to FIG. 19, the 1-1 sub-vibration generating means 30AS1 and the 2-1 sub-vibration generating means 30AS2 may be incorporated into a first common vibration generating means 30CS1.

[0092] The first common vibration generating means 30CS1 generates vibration by applying friction to the curved surface CS in the third area AR3 of the first base portion 10A and the fifth area AR5 of the second base portion 10B.

[0093] The 1-2 sub-vibration generating means 30BS1 and the 2-2 sub-vibration generating means 30BS2 may be incorporated into the second common vibration generating means 30CS2. The second common vibration generating means 30CS2 can generate vibration by applying friction to the bending surface CS in the fourth area AR4 of the first base part 10A and the sixth area AR6 of the second base part 10B.

[0094] Although the present invention has been described in detail using the preferred embodiment, the scope of the present invention should not be limited to the specific embodiment, but should be interpreted by the appended claims. In addition, it should be understood that many modifications and variations are possible without departing from the scope of the present invention, if one has ordinary skill in the art. [Explanation of symbols]

[0095] 10S: Power generation equipment 10: Base section 20: Piezoelectric part 30: Vibration generating means 40: Drive unit 50: Whip Trigger

Claims

1. A piezoelectric unit includes a cylindrical base and at least one piezoelectric element disposed on an outer surface of the base and configured to generate electricity by vibration generated by the base, The power generating device using resonance to improve efficiency is characterized in that one side of the base is open and the other side is closed.

2. The base further includes a cover portion that covers the other side of the base portion, and a pillar portion that is connected to a central portion of the cover portion. The cover portion includes a convexly protruding portion, 2. The power generating device as claimed in claim 1, wherein the pillars are connected to a support.

3. The base portion has at least one flat surface on an outer surface thereof, and the piezoelectric portion is disposed on the flat surface. a curved surface is located between the flat surface and one side of the base in a longitudinal direction of the base, 2. The power generating device according to claim 1, further comprising a vibration generating means for applying at least one of friction and impact to the curved surface to generate vibration in the base portion.

4. 4. The power generating device with improved efficiency using resonance as described in claim 3, characterized in that a wall thickness in the region of the base portion corresponding to the curved surface is thicker than a maximum wall thickness in the region of the base portion corresponding to the flat surface.

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