JP2017221000A - Vibration power generator and method of manufacturing vibration power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of fastening components further than the prior arts while keeping accuracy capable of obtaining desired power generation efficiency.SOLUTION: A vibration power generator comprises a vibration power generation unit (20) having a block structure in which a movable part is held by a leaf spring (21) with respect to a pair of coil bases (23 and 24) provided in both ends of a hollow coil (25) and there is fixed spacing between an inner periphery of the coil and an outer periphery of the movable part, and a circuit component. The vibration power generator has a fixture structure in which the circuit component and the vibration power generation unit are inserted into a case cylinder (14) while being disposed in an overlapping state, and held between an upper component (2) and a lower component (11), such that the circuit component and the vibration power generation unit are fixed in the case cylinder while being integrated.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vibration generator that can generate electric energy using vibration energy of an external environment and can be applied to a communication system or a wireless sensor system, and a method of manufacturing the vibration generator.

  When the magnet is vibrated so as to pass through the conductive coil, an induced current is generated in the coil and an electromotive force is generated. As an example of utilizing this principle, there is an electromagnetic induction type vibration generator using a leaf spring. Such a vibration generator can generate electric energy based on vibration energy of the external environment.

  Furthermore, by using a vibration generator, it is possible to generate electric energy while eliminating the need for power supply by a power cable or a battery. From this point of view, vibration generators are expected to be used in many applications where economic advantages or operational advantages are expected. And as a vibration generator using a spring, there is a conventional technique for miniaturization (see, for example, Patent Document 1 and Patent Document 2).

  In addition, by incorporating a wireless sensor in the vibration generator, it is possible to realize a vibration generator having a wireless sensor function that eliminates the need for power supply using vibration energy of the external environment.

JP 2013-90503 A JP 2014-79118 A

However, the prior art has the following problems.
In the conventional electromagnetic induction type vibration generator using a spring, in order to improve efficiency, it is necessary to accurately fix the gap between the movable part held by the spring and the coil, and the electromagnetic induction using the spring In the type of vibration generator, it is necessary to mechanically fix each component mechanically because of the mechanism that uses the resonance between the spring and the movable part.

  Therefore, as described above, the conventional electromagnetic induction type vibration generator using a spring has a problem that a large number of fastening parts are required for securing each part and ensuring the positional accuracy of the gap.

  The present invention has been made to solve the above-described problems, and a vibration generator capable of reducing the number of fastening parts as compared with the prior art while ensuring the accuracy with which a desired power generation efficiency can be obtained. It aims at obtaining the manufacturing method of a vibration generator.

  In the vibration generator according to the present invention, the movable part is held by a leaf spring with respect to a pair of coil bases provided at both ends of the hollow coil, and the inner periphery of the coil and the outer periphery of the movable part are independent with a constant interval. The vibration power generation unit having a block structure and a circuit component that operates using the electric energy generated by the vibration power generation unit as a power source, and the circuit component and the vibration power generation unit are inserted into the case cylinder in a state of being overlaid. And a fixing structure that is fixed to the case cylinder in an integrated state by being sandwiched between an upper part that is clamped and fixed to the upper part of the case cylinder and a lower part that is clamped and fixed to the lower part of the case cylinder It is.

  The method of manufacturing a vibration generator according to the present invention includes a first step of forming a movable part by inserting a shaft into a cylindrical or cylindrical magnet, arranging yokes at both ends and connecting with a spacer, The movable part is inserted into a hollow coil fixed to the coil base, and the lower coil base and the lower coil base are disposed opposite to each other so that the inner periphery of the coil and the outer periphery of the movable part have a constant interval. A second step of forming a vibration power generation unit having an independent block structure by fastening to the upper coil base via a disk-shaped leaf spring, and using electric energy generated by the vibration power generation unit as a power source The operating circuit component and the vibration power generation unit are inserted into the case cylinder in a stacked state, and the upper part that is tightened and fixed to the upper part of the case cylinder and the lower part of the case cylinder are fixed and fixed That by sandwiching a lower part, in which a third step of fixing the casing tube with integral state.

  According to the present invention, there is provided a fixed structure in which both ends of the movable part are held by the leaf spring, the vibration power generation part having an independent block structure, and other parts are integrated and tightened and fixed from above and below the case cylinder. Yes. As a result, it is possible to obtain a vibration generator and a method of manufacturing the vibration generator that can reduce the number of fastening parts as compared with the conventional one while ensuring the accuracy with which desired power generation efficiency can be obtained.

It is sectional drawing which shows the structure of the vibration electric power generation part which is a part of vibration generator in Embodiment 1 of this invention. It is a figure which shows the internal structure of the vibration electric power generation part which is a part of vibration generator in Embodiment 1 of this invention. It is sectional drawing which shows the structure of the vibration generator provided with the wireless sensor function in Embodiment 1 of this invention. It is a figure which shows the internal structure of the vibration generator provided with the wireless sensor function in Embodiment 1 of this invention. It is sectional drawing which shows the structure of the vibration electric power generation part which is a part of vibration electric power generator in Embodiment 2 of this invention. It is a figure which shows the internal structure of the vibration electric power generation part which is a part of vibration electric power generator in Embodiment 2 of this invention. It is sectional drawing which shows the structure of the vibration generator in Embodiment 2 of this invention. It is a figure which shows the internal structure of the vibration generator in Embodiment 2 of this invention.

The vibration generator and the method of manufacturing the vibration generator according to the present invention have the following two technical features.
(First Feature) The movable part of the vibration power generation part has an independent block structure held by a leaf spring with respect to the coil bases provided at both ends.
(Second feature) A vibration generator with a block structure and a plurality of circuit components necessary for wireless communication are integrated into the vibration generator by being tightened from above and below, and are built in the vibration generator. Therefore, it has a fixing structure that is firmly fixed.

  By providing such a block structure and a fixed structure, the vibration generator can be configured with only two pairs of fastening parts by a fastening part of a movable part and a leaf spring in the block structure and fastening parts at both ends of the case cylinder in the fixed structure. An excellent effect of being assembled can be obtained.

  Accordingly, preferred embodiments of the vibration generator and the method of manufacturing the vibration generator according to the present invention having such technical features will be described below in detail with reference to the drawings.

Embodiment 1 FIG.
First, regarding the first feature, “the movable portion of the vibration power generation unit has an independent block structure held by a leaf spring with respect to the coil bases provided at both ends”. Explained. In the first embodiment, a vibration generator having a wireless sensor mechanism will be described as a specific example.

  FIG. 1 is a cross-sectional view showing a configuration of a vibration power generation unit that is a part of the vibration power generator according to Embodiment 1 of the present invention. Moreover, FIG. 2 is a figure which shows the internal structure of the vibration electric power generation part which is a part of vibration electric power generator in Embodiment 1 of this invention.

  The movable part in the vibration power generation unit 20 is configured by arranging yokes 27a and 27b at both ends of the magnets 28a and 28b and being connected via a shaft 30 and spacers 26a and 26b. The vibration power generation unit 20 is configured such that the movable part is vertically moved by leaf springs 21a and 21b and fixing bolts 22a and 22b with respect to the upper coil base 23 and the lower coil base 24 arranged at both ends in the axial direction of the shaft 30. The block structure is configured only by tightening.

  A coil 25 having four coils 25 a to 25 b is inserted into the lower coil base 24. The inner periphery of the coil 25 and the outer periphery of the movable portion are fixed with a certain gap.

  As described above, the vibration power generation unit 20 according to the first embodiment has a structure in which the movable part is clamped and held on the coil bases 23 and 24 from above and below by the leaf springs 21a and 21b and the fixing bolts 22a and 22b. It has a simple block structure that vibrates in the axial direction. The vibration applied to the vibration power generation unit 20 is transmitted from the coil bases 23 and 24 to the movable unit through the leaf springs 21a and 21b. As a result, the movable part vibrates and an electromotive force is generated in the coil 25.

  Next, the second characteristic is “vibration power generation in a state where a block-structured vibration power generation unit and a plurality of circuit components necessary for wireless communication and the like are integrated and clamped from above and below. The point of having a fixing structure that is firmly fixed by being incorporated in the machine will be described below.

  FIG. 3 is a cross-sectional view showing the configuration of the vibration generator having the wireless sensor function according to Embodiment 1 of the present invention. FIG. 4 is a diagram showing the internal structure of the vibration generator having the wireless sensor function according to Embodiment 1 of the present invention.

  The vibration generator having a wireless sensor function shown in FIGS. 3 and 4 includes an antenna 1, an upper lid 2, an upper bracket 3, a connector 4, a wireless board 5, a spacer 6, a power supply board 7, a spacer 8, an acceleration sensor 9, A stud 10, a lower bracket 11, shield plates 12 a and 12 b, a cable guide 13, a case tube 14, a bracket 15, and a vibration power generation unit 20 are configured. Here, the wireless substrate 5, the power supply substrate 7, and the acceleration sensor 9 correspond to wireless sensor-related components that operate using electric energy generated by the vibration power generation unit 20 as a power source.

  In FIG. 3, the antenna 1, the upper bracket 3 to which the connector 4 is attached, the wireless board 5, the spacer 6, the power supply board 7, the spacer 8, the vibration power generation unit 20, and the acceleration sensor 9 are placed in a cylindrical case cylinder 14. The studs 10 are arranged so as to overlap in order. Furthermore, in the first embodiment, the vibration generator having the wireless sensor function is configured by tightening and fastening the configuration arranged in an overlapping manner between the upper lid 2 and the lower bracket 11. ing.

  In addition, shield plates 12 a and 12 b and a cable guide 13 are also provided in the cylindrical case cylinder 14. The shield plates 12 a and 12 b are sandwiched and fixed from both side surfaces of the vibration power generation unit 20 in order to shield the magnetic field inside the vibration power generation unit 20. Further, the cable guide 13 serves as a guide for passing a signal line from the acceleration sensor 9 to the wireless substrate 5.

  Male screws are provided on the outer periphery of the upper lid 2 and the lower bracket 11. On the other hand, a female screw is applied to the inner periphery of both ends of the case cylinder 14. With such a configuration, the vibration generator having the wireless sensor function according to the first embodiment has a fixed structure that is firmly fixed by tightening the upper lid 2 and the lower bracket 11 to the case cylinder 14. Become.

  The vibration power generation unit 20 is tightened together with the wireless substrate 5, the spacer 6, the power supply substrate 7, and the spacer 8 so as to be sandwiched between the upper lid 2 and the lower bracket 11. For this reason, the vibration applied to the lower bracket is applied to the integrated vibration power generation unit 20 by having a fixing structure that is firmly fixed inside the case tube 14.

  As described above, according to the first embodiment, in the vibration power generator using a leaf spring, the movable portion of the vibration power generation portion has an independent block structure that is held between the coil bases by the leaf spring. . In addition, a fixed structure is provided in which a plurality of components and the vibration power generation unit built in the vibration generator are firmly fixed by being sandwiched by tightening the upper lid and the lower bracket from both ends of the case cylinder.

  Accordingly, a vibration generator having a wireless sensor function having a robust structure can be obtained only by two pairs of fastening by a fastening portion of a plate spring of a movable portion in a block structure and a fastening portion at both ends of a case cylinder in a fixed structure. An excellent effect of being assembled can be obtained.

  The greater the number of fastening points with screws, bolts, etc., the more likely the looseness and displacement occur. On the other hand, the vibration power generator having the wireless sensor function according to the first embodiment can be configured with only two pairs of very few fastening portions. As a result, it is possible to ensure very high reliability with respect to looseness and displacement.

  Furthermore, in the vibration generator having the wireless sensor function according to the first embodiment, only the portion where the upper lid and the lower bracket are attached to the case cylinder is a fastening portion that appears on the surface of the cylindrical vibration generator. For this reason, it is possible to easily achieve a waterproof and dustproof structure by applying the liquid gasket to the mounting screw portions of the case cylinder and the upper lid, and the case cylinder and the lower bracket.

Embodiment 2. FIG.
In the first embodiment, the case where the wireless sensor function is provided is specifically described as the second feature. On the other hand, in this Embodiment 2, a wireless sensor function is omitted, and a vibration generator configured by combining a vibration power generation unit and a power supply board and a method of manufacturing the vibration power generator will be described.

  First, regarding the first feature, “the movable portion of the vibration power generation unit has an independent block structure held by a leaf spring with respect to the coil bases provided at both ends”. Explained.

  FIG. 5 is a cross-sectional view illustrating a configuration of a vibration power generation unit that is a part of the vibration power generator according to the second embodiment of the present invention. Moreover, FIG. 6 is a figure which shows the internal structure of the vibration electric power generation part which is a part of vibration electric power generator in Embodiment 2 of this invention.

  The movable part in the vibration power generation unit 40 is configured by arranging yokes 207 and 207b at both ends of the magnets 208a and 208b and being connected via a shaft 210 and spacers 206a and 206b. In the vibration power generation unit 40, the movable part is moved up and down by the leaf springs 201a and 201b and the fixing bolts 202a and 202b with respect to the upper coil base 203 and the lower coil base 204 arranged at both ends of the shaft 210 in the axial direction. The block structure is configured only by tightening.

  A coil 205 having four coils 205a to 205b is inserted into the lower coil base 204. The inner periphery of the coil 25 and the outer periphery of the movable part are fixed with a certain gap.

  Thus, the vibration power generation unit 40 according to the second embodiment has a structure in which the movable part is clamped and held on the coil bases 203 and 204 from above and below by the leaf springs 201a and 201b and the fixing bolts 202a and 202b. It has a simple block structure that vibrates in the axial direction. The vibration applied to the vibration power generation unit 40 is transmitted from the coil bases 203 and 204 to the movable part through the leaf springs 201a and 201b. As a result, the movable part vibrates and an electromotive force is generated in the coil 205.

  Next, the second characteristic is “vibration power generation in a state where a block-structured vibration power generation unit and a plurality of circuit components necessary for wireless communication and the like are integrated and clamped from above and below. The point of having a fixing structure that is firmly fixed by being incorporated in the machine will be described below. In the second embodiment, a vibration generator in which a vibration power generation unit and a power supply board are combined will be described as a specific example.

  FIG. 7 is a cross-sectional view showing the configuration of the vibration power generator in Embodiment 2 of the present invention. FIG. 8 is a diagram showing the internal structure of the vibration generator in the second embodiment of the present invention.

  7 and 8 includes a connector 31, an upper lid 32, a power supply board 33, a spacer 34, shield plates 35a and 35b, interference members 36a and 36b, shield plates 37a and 37b, a cable guide 38, and a base 39. The vibration power generation unit 40 and the case cylinder 41 are provided.

  In FIG. 7, in a cylindrical case cylinder 41, an upper lid 32 to which a connector 31 is attached, a power supply substrate 33, a spacer 34, a shield plate 35a to which an interference material 36a is attached, a vibration power generation unit 40, and an interference material 36b. A shield plate 35b to which is attached is arranged in order. Further, in the second embodiment, the vibration generator is configured by fastening and fastening the overlapped configuration between the upper lid 32 and the base 39.

  In the cylindrical case cylinder 41, shield plates 37a and 37b and a cable guide 38 are also provided. The shield plates 37 a and 37 b are sandwiched and fixed from both side surfaces of the vibration power generation unit 40 in order to shield the magnetic field inside the vibration power generation unit 40. The cable guide 38 serves as a guide for passing wiring from the vibration power generation unit 40 to the power supply substrate 33.

  Male screws are provided on the outer periphery of the upper lid 32 and the base 39. On the other hand, female threads are provided on the inner periphery of both ends of the case cylinder 41. With such a configuration, by tightening the upper lid 32 and the base 39 to the case cylinder 41, the vibration generator according to the second embodiment has a firmly fixed structure.

  The vibration power generation unit 40 is tightened together with the power supply substrate 33, the spacer 34, and the shield plates 35 a and 35 b so as to be sandwiched between the upper lid 32 and the base 39. For this reason, the vibration applied to the base 39 is applied to the integrated vibration power generation unit 40 by having a fixing structure that is firmly fixed inside the case cylinder 41.

  As described above, according to the second embodiment, in the vibration power generator using a leaf spring, the movable portion of the vibration power generation portion has an independent block structure that is held between the coil bases by the leaf spring. . In addition, a fixed structure is provided in which a plurality of components and the vibration power generation unit built in the vibration power generator are firmly fixed by being sandwiched by tightening the upper lid and the lower base from both ends of the case cylinder.

  As a result, the vibration power generation has a robust structure with a built-in component such as a power supply board by only two pairs of fastening by the fastening portion of the leaf spring of the movable portion in the block structure and the fastening portion at both ends of the case cylinder in the fixed structure. An excellent effect that the machine can be assembled can be obtained.

  The greater the number of fastening points with screws, bolts, etc., the more likely the looseness and displacement occur. On the other hand, the vibration generator according to the second embodiment can be configured with only two pairs of very few fastening portions. As a result, it is possible to ensure very high reliability with respect to looseness and displacement.

  Furthermore, in the vibration power generator according to the second embodiment, only the part where the upper lid and the lower base are attached to the case cylinder is a fastening part that appears on the surface of the cylindrical vibration power generator. For this reason, it is possible to easily form a waterproof and dustproof structure by applying the liquid gasket to the mounting screw portions of the case cylinder and the upper lid and the case cylinder and the lower base.

  1 antenna, 2 upper lid, 3 upper bracket, 4 connector, 5 radio board, 6 spacer, 7 power supply board, 8 spacer, 9 acceleration sensor, 10 stud, 11 lower bracket, 12a, 12b shield plate, 13 cable guide, 14 case Tube, 15 Bracket, 20 Vibration generator, 21a, 21b Leaf spring, 22a, 22b Fixing bolt, 23 Upper coil base, 24 Lower coil base, 25 Coil, 26a, 26b Spacer, 27a, 27b Yoke, 28a, 28b Magnet, 29 York, 30 Shaft, 31 Connector, 32 Upper cover, 33 Power supply board, 34 Spacer, 35a, 35b Shield plate, 36a, 36b Interference material, 37a, 37b Shield plate, 38 Cable guide, 39 Base, 40 Vibration power generation unit, 1 case tube, 201a, 201b leaf spring, 202a, 202b fixing bolt, 203 upper coil base, 204 lower coil base, 205 coil, 206a spacer, 206b spacer, 207a, 207b yoke, 208a, 208b magnet, 209 yoke, 210 shaft .

In the vibration generator according to the present invention, the movable part is held by a leaf spring with respect to a pair of coil bases provided at both ends of the hollow coil, and the inner periphery of the coil and the outer periphery of the movable part are independent with a constant interval. The vibration power generation unit having a block structure and a circuit component that operates using the electric energy generated by the vibration power generation unit as a power source, and the circuit component and the vibration power generation unit are inserted into the case cylinder in a state of being overlaid. together is, by being sandwiched by the lower part being fastened to the bottom of the upper part and the case cylinder is fastened to the upper part of the case cylinder have a fixed structure which is fixed to the case barrel by integral state The movable part is configured by inserting a shaft into a columnar or cylindrical magnet, connecting yokes at both ends and connecting with spacers, and fastening a disc-shaped leaf spring from both ends. Those held in the coil base.

Claims (6)

Vibration power generation having an independent block structure in which a movable portion is held by a leaf spring with respect to a pair of coil bases provided at both ends of a hollow coil, and an inner periphery of the coil and an outer periphery of the movable portion are spaced apart from each other And
Circuit components that operate using electrical energy generated by the vibration power generation unit as a power source,
The circuit component and the vibration power generation unit are inserted into the case cylinder in a state where they are arranged in an overlapping manner, and an upper part that is clamped and fixed to the upper part of the case cylinder and a lower part that is clamped and fixed to the lower part of the case cylinder A vibration generator having a fixing structure that is fixed to the case cylinder in an integrated state by being sandwiched between side parts. The movable part is configured by inserting a shaft into a columnar or cylindrical magnet, arranging yokes at both ends and connecting with spacers, and fastening disc-shaped plate springs from both ends to the pair of coil bases. The vibration generator according to claim 1, wherein the vibration generator is held. The case tube is provided with female threads on the inner periphery at the upper end and the inner periphery at the lower end.
The upper part and the lower part are externally threaded, and are fastened and fixed to the upper and lower parts of the case tube so that the vibration power generation unit and the circuit part are integrated. The vibration generator according to claim 1 or 2, wherein the vibration generator is fixed to the case tube. The vibration generator according to any one of claims 1 to 3, wherein each of the case cylinder, the upper part, and the lower part has a waterproof and dustproof structure. The vibration generator according to any one of claims 1 to 4, wherein the circuit component includes a wireless sensor-related component and has a wireless sensor function. A first step of forming a movable part by inserting a shaft into a cylindrical or cylindrical magnet, arranging yokes at both ends and connecting with a spacer;
The movable part is inserted into a hollow coil fixed to the lower coil base, and the lower coil base and the lower coil base are arranged so that the inner periphery of the coil and the outer periphery of the movable part have a constant interval. A second step of forming a vibration power generation part having an independent block structure by fastening the movable part via a disk-shaped leaf spring to the upper coil base disposed opposite to the coil;
An upper part that is inserted into a case cylinder in a state where the circuit part that operates using electric energy generated by the vibration power generation part as a power source and the vibration power generation part are arranged in an overlapping manner, and is fastened and fixed to the upper part of the case cylinder, and And a third step of fixing to the case cylinder in an integrated state by being sandwiched between lower parts fastened and fixed to the lower part of the case cylinder.

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