JP2012165581A - Oscillation power generator and manufacturing method of oscillation power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oscillation power generator which suppresses the influence of magnetic attraction between a movable element including permanent magnets and a shield member made of a magnetic material and prevents the reduction of the power generation amount.SOLUTION: An oscillation power generator includes: a coil made of a conductive material; a movable element reciprocating in the coil and including permanent magnets; a guide member made of a non-magnetic material and guiding the movable element so as to reciprocate in one direction; a shield member disposed on the outer side of the guide member and made of a magnetic material; and a viscous body provided between the movable element and the guide member.

Description

  The present invention relates to a vibration generator that obtains electric power from a current generated by a permanent magnet reciprocating in one direction in a coil, and a method for manufacturing the vibration generator.

  2. Description of the Related Art Conventionally, an electromagnetic induction type vibration generator that obtains electric power from a current generated by a permanent magnet reciprocatingly moving in one direction in a coil is known. Such an electromagnetic induction type vibration generator is known from Patent Document 1 and the like. In the vibration power generator described in this document, a ring-shaped permanent magnet is disposed inside a cylindrical casing made of a nonmagnetic material. The permanent magnet is inserted through a guide core disposed at the center of the casing and moves inside the casing. This guide core is a guide member that guides the permanent magnet to move in one direction. Due to the reciprocating movement of the permanent magnet, a current is generated in the coil disposed on the inner peripheral surface of the casing. This housing is disposed inside a cylindrical shield case made of a magnetic material. The shield case made of this magnetic material forms a magnetic circuit with the permanent magnet, thereby improving the magnetic flux density across the coil. As a result, the amount of power generation increases. Further, it is possible to prevent the magnetic flux generated by the permanent magnet from leaking outside the shield case.

JP 2010-115076 A

  When the permanent magnet is arranged inside the casing, a phenomenon that the magnet is pulled toward the side wall of the shield case made of a magnetic material by the magnetic force of the permanent magnet, that is, magnetic adhesion occurs. Thereby, the movement of the permanent magnet is hindered and the power generation amount is reduced. More specifically, the influence of this magnetic adhesion depends on the distance between the permanent magnet and the shield case. If the center of the ring-shaped permanent magnet coincides with the center of the cylindrical shield case in the longitudinal section of the shield case, the attractive force acting on the permanent magnet is the same in the radial direction. As a result, the attractive forces acting on the permanent magnets cancel each other, and the resultant attractive force becomes zero. However, the ring-shaped permanent magnet is inserted into the guide core and reciprocates along the guide core. For this reason, the inner diameter of the permanent magnet is designed to be larger than the outer diameter of the guide core. Accordingly, a gap is generated between the permanent magnet and the guide core. When the permanent magnet is displaced from the center of the shield case by this gap, the distance between the permanent magnet and the shield case is shortened by the gap. As a result, the attractive force increases in the direction in which the permanent magnet deviates from the center of the shield case. That is, the resultant force of the attractive force acting on the permanent magnet does not become zero. As a result, the permanent magnet is magnetically attached to the shield case.

  The decrease in the amount of power generation due to the influence of magnetic adhesion does not occur only in the vibration generator provided with the guide core, but occurs in the vibration generator provided with a permanent magnet and a shield case. In other words, the vibration generator also includes a permanent magnet, a coil, a shield case, and a guide member such as the above-described housing that guides the permanent magnet to move in one direction without the guide core. Specifically, since the permanent magnet reciprocates inside the casing, the inner diameter of the casing is designed to be larger than the outer diameter of the permanent magnet. Accordingly, a gap is generated between the permanent magnet and the housing. If the permanent magnet is displaced from the center of the casing by the gap, the distance between the permanent magnet and the shield case is shortened by the gap. As a result, the attractive force increases in the direction in which the permanent magnet deviates from the center of the shield case. That is, the resultant force of the attractive force acting on the permanent magnet does not become zero. As a result, the permanent magnet is magnetically attached to the shield case.

  The present invention has been made in order to solve the above-described problems, and can suppress the influence of magnetic adhesion caused by a mover including a permanent magnet and a shield member made of a magnetic material, thereby suppressing a decrease in power generation amount. The object is to provide a vibration generator.

  In order to achieve the above object, the present invention according to claim 1 is a coil made of a conductive material, a mover that reciprocates inside the coil, a permanent magnet, and a non-magnetic material, the movable A guide member that guides the child to reciprocate in one direction, a shield member that is disposed outside the guide member and is made of a magnetic material, and a viscous body that is provided between the mover and the guide member; It is characterized by providing.

  In order to achieve the above object, according to a second aspect of the present invention, in the vibration power generator according to the first aspect, a cylindrical member that houses the movable element therein, and a seal that seals both ends of the cylindrical member. A stop portion, and the mover includes a through hole along a longitudinal direction of the guide member.

  To achieve the above object, according to a third aspect of the present invention, in the vibration power generator according to the first or second aspect, the guide member has a first viscous body reservoir for accumulating the viscous body as the movable body. In a region where the child moves reciprocally, the viscous body is supplied from the first viscous body reservoir to the movable body when the movable body is positioned opposite to the first viscous body reservoir. Is.

  In order to achieve the above object, according to a fourth aspect of the present invention, in the vibration power generator according to the third aspect, a cylindrical member that houses the movable element therein, and a seal that seals both ends of the cylindrical member. The guide member is the cylindrical member, and the first viscous body reservoir is disposed at at least one end of the cylindrical member and is perpendicular to the longitudinal direction of the guide member. The cross-sectional area of one viscous body reservoir is larger than the cross-sectional area of the cylindrical member in the perpendicular direction.

  In order to achieve the above object, according to a fifth aspect of the present invention, in the vibration power generator according to the fourth aspect, the first viscous body reservoirs are disposed at both ends of the cylindrical member, and the first viscous body is provided. The length of the body reservoir in the longitudinal direction is not more than 0.5 times the length of the mover in the longitudinal direction.

  In order to achieve the above object, according to a sixth aspect of the present invention, in the vibration power generator according to the fourth or fifth aspect, the first viscous body reservoir includes the sealing portion, the coil, and the coil in the longitudinal direction. The cross-sectional area of the perpendicular | vertical direction of the edge part which is arrange | positioned between and is close to the coil of the said 1st viscous body pool contains the area | region which becomes large gradually in the direction which goes to the said sealing part from the said coil. It is characterized by.

  In order to achieve the above object, according to a seventh aspect of the present invention, in the vibration power generator according to any one of the first to sixth aspects, the guide member is a cylindrical member that accommodates the mover therein. And the mover includes a plurality of the permanent magnets and fastening members that fasten the plurality of permanent magnets, and the mover includes a second viscous body reservoir formed between the adjacent permanent magnets. It is characterized by this.

  In order to achieve the above object, according to an eighth aspect of the present invention, in the vibration power generator according to any one of the fourth to sixth aspects, the guide member is a cylindrical member that accommodates the mover therein. And the mover includes a plurality of permanent magnets and fastening members that fasten the plurality of permanent magnets, and the mover includes a second viscous body reservoir formed between the adjacent permanent magnets. The first viscous body reservoir is disposed at at least one end of the cylindrical member, and a cross-sectional area of the first viscous body reservoir in the vertical direction is larger than a cross-sectional area of the cylindrical member in the vertical direction. When the mover is positioned at the end of the cylindrical member on which the first viscous body reservoir is disposed, the first permanent magnet disposed closest to the first viscous body reservoir, and the first Before being formed between the second permanent magnet adjacent to the permanent magnet Accumulates second viscous body, it is characterized in that opposite to the reservoir the first viscous body.

  In order to achieve the above object, according to a ninth aspect of the present invention, in the vibration power generator according to any one of the first to eighth aspects, the tubular member includes a rib having elasticity on a side surface, and the shield. It is provided in pressure contact with the member.

  In order to achieve the above object, according to the present invention, a coil member made of a conductive material is provided on an outer peripheral surface, and a cylindrical member made of a nonmagnetic material is arranged inside a shield member made of a magnetic material. A cylindrical member disposing step, a viscous member disposing step of providing a viscous body on at least one of a side surface of the mover including a permanent magnet and an inner peripheral surface of the cylindrical member, and the movable member of the cylindrical member And a mover arranging step arranged inside.

  According to the vibration generator of the first aspect, the mover reciprocates while maintaining an interval corresponding to the thickness of the viscous body with the guide member in a direction orthogonal to the reciprocation direction. Access to the shield member during movement is suppressed. As a result, the resultant force of the attractive force acting on the permanent magnet is reduced inside the shield member. Therefore, the influence of magnetic adhesion can be suppressed more than the vibration generator in which the viscous body is not provided between the mover and the guide member. Thereby, the fall of the electric power generation amount by the influence of magnetic attachment can be suppressed.

  According to the vibration generator of the second aspect, when the mover moves inside the cylindrical member, the air moves through the through hole. As a result, air resistance acting on the mover is reduced. As a result, it is possible to suppress the movement of the mover from being inhibited. Therefore, it is possible to suppress a decrease in the amount of power generation. Moreover, a sealing part seals the both ends of a cylindrical member. Thereby, when a viscous body moves from between a needle | mover and a guide member, it can prevent that a viscous body leaks outside the cylindrical member.

  According to the vibration generator of claim 3, even when the viscous body moves from between the movable element and the guide member, when the movable element faces the first viscous body reservoir, the viscous body is again formed. Is supplied to the mover. As a result, the distance between the permanent magnet and the shield member is suppressed as the mover moves in one direction. Therefore, it is possible to suppress a decrease in the amount of power generation. In particular, in a vibration power generator, since the mover moves in one direction and power is generated, power generation and supplying a viscous body to the mover are performed simultaneously. That is, it is not necessary to provide a configuration for performing an operation only for supplying the viscous body to the mover independently of the power generation operation, and the configuration can be simplified.

  According to the vibration generator of the fourth aspect, since the stay time of the mover is increased near the sealing portion as compared with the central region of the cylindrical member, the viscous body is between the mover and the guide member. There is a time that is supplied to the gap and spreads sufficiently. Thereby, a viscous body becomes easy to be supplied to a needle | mover. As a result, the distance between the permanent magnet and the shield member is further suppressed. Accordingly, it is possible to further suppress a decrease in the amount of power generation.

  According to the vibration generator of the fifth aspect, the viscous body is supplied to the movable element when the movable element moves to the vicinity of both ends of the cylindrical member. Since the location of the movable element to which the viscous material is supplied becomes an area corresponding to the sum of the lengths of the first viscous material reservoirs disposed at both ends, the location to which the viscous material is supplied becomes wider. As a result, the distance between the permanent magnet and the shield member is further suppressed. Accordingly, it is possible to further suppress a decrease in the amount of power generation. Further, when the mover is positioned to face the first viscous material reservoir, the central position of the movable member in the longitudinal direction of the guide member is the end of the first viscous material reservoir on the central region side, or It arrange | positions in the position which does not oppose the 1st viscous body reservoir. Accordingly, when the mover is positioned to face the first viscous material reservoir, the first viscous material reservoir having a cross-sectional area larger than the cross-sectional area of the cylindrical member makes it difficult for the mover to deviate from one direction. . As a result, it is possible to suppress the movement of the mover from being hindered by the movement of the mover from one direction. Accordingly, it is possible to further suppress a decrease in the amount of power generation.

  According to the vibration power generator of the sixth aspect, the end portion of the first viscous material reservoir is inclined with respect to the longitudinal direction. When the mover moves inside the cylindrical member sealed at both ends by the sealing portion, the viscous body may move from between the mover and the cylindrical member and accumulate at both ends of the cylindrical member. . When the viscous material accumulated at both ends of the cylindrical member contacts the mover, the viscous member receives a force including a component in the same direction as the moving direction of the mover from the mover. When the viscous body receiving this force comes into contact with the sealing portion, a reaction force in the direction opposite to the direction of the force received from the mover is received from the sealing portion. This reaction force causes the viscous body to move in the direction of the reaction force. Next, when the viscous body moves in the direction of the reaction force and comes into contact with the end portion closer to the coil, it receives a reaction force including a component in a direction perpendicular to the longitudinal direction of the cylindrical member from the end portion. Due to the reaction force from this end, the viscous body is likely to move toward the side surface of the mover. As a result, the viscous body is easily supplied to the mover. Therefore, the distance between the permanent magnet and the shield member is further suppressed. Accordingly, it is possible to further suppress a decrease in the amount of power generation.

  According to the vibration generator of the seventh aspect, the viscous material is supplied from the second viscous material reservoir to the movable element. Therefore, the distance between the permanent magnet and the shield member is further suppressed. Accordingly, it is possible to further suppress a decrease in the amount of power generation.

  According to the vibration generator of the eighth aspect, when the mover moves to the end portion of the cylindrical member where the first viscous body reservoir is disposed, the viscous body moves from the first viscous body reservoir to the mover and the second. It is supplied to the viscous material reservoir. The viscous body supplied to the second viscous body reservoir is also supplied to the movable body even when the movable element is not positioned facing the first viscous body reservoir. As a result, the distance between the permanent magnet and the shield member is further suppressed. Accordingly, it is possible to further suppress a decrease in the amount of power generation.

  According to the vibration generator of the ninth aspect, the distance between the center of the shield member and the center of the cylindrical member is shorter than that of the vibration generator including the cylindrical member not including the rib. Thereby, the permanent magnet arrange | positioned inside a cylindrical member is suppressed more that the distance with a shield member becomes near. Accordingly, it is possible to further suppress a decrease in the amount of power generation.

  According to the method for manufacturing a vibration power generator according to claim 10, the mover is reciprocally moved while maintaining an interval corresponding to the thickness of the viscous body with the cylindrical member in a direction orthogonal to the reciprocating direction. Then, it is possible to prevent the shield member from being approached during the reciprocal movement. As a result, the resultant force of the attractive force acting on the permanent magnet is reduced inside the shield member. Therefore, the influence of magnetic adhesion is suppressed as compared with a vibration generator in which a viscous body is not provided between the mover and the cylindrical member. Thereby, the vibration generator which can suppress the fall of the electric power generation amount by the influence of magnetic attachment can be manufactured.

It is the schematic sectional drawing cut | disconnected along the longitudinal direction of the vibration generator 1 which concerns on 1st Embodiment of this invention. FIG. 3 is an enlarged view of the vicinity of the end 11 of the vibration power generator 1 when the mover 30 moves to the vicinity of the end 11 of the cylindrical member 10. It is sectional drawing which follows the AA line of the vibration generator 1 shown in FIG. It is sectional drawing perpendicular | vertical to the longitudinal direction of a vibration generator in which the viscous body 40 is not provided. It is the graph which showed the electric power generation amount when the viscous body 40 was provided. It is a perspective view of cylindrical member 10A provided with ribs 16A1 and 16A2. It is the graph which showed the electric power generation amount when a viscous body is provided in the vibration generator 1 which is not provided with a shielding member. It is a perspective view of cylindrical member 10B in which a rib is not provided. The graph which showed the electric power generation amount when the viscous body 40 was provided in a vibration generator provided with 10A of cylindrical members, and a vibration generator provided with the cylindrical member 10B. It is the schematic sectional drawing cut | disconnected along the longitudinal direction of the vibration generator 100 which concerns on 2nd Embodiment of this invention. The schematic sectional drawing of the cylindrical member 213 and the coil 20 of the modification 2. As shown in FIG. 6 is a schematic cross-sectional view of a guide core 301, a cylindrical member 303, and a coil 20 described in Modification 2. FIG. The schematic sectional drawing of the permanent magnets 431A, 431B, 431C, the grooves 433A, 433B, 433C, and the fastening member 32 provided in the mover 430 according to the modification 10.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic sectional view cut along the longitudinal direction of the vibration generator 1. As shown in FIG. 1, the vibration power generator 1 includes a cylindrical member 10, coils 20 </ b> A, 20 </ b> B, and 20 </ b> C, a mover 30, a viscous body 40, and a shield member 50. The coils 20A, 20B, and 20C may be described as the coil 20 in the following description. The cylindrical member 10 is an example of the guide member and the cylindrical member of the present invention.

  The hollow cylindrical member 10 is made of a nonmagnetic material such as ABS, POM, PC, LCP, or alumina. The inner diameters of the end portions 11 and 12 in the longitudinal direction D1 of the cylindrical member 10 are larger than the inner diameter of the central region Z1 of the cylindrical member 10 where the coil 20 is provided. That is, the cross-sectional area perpendicular to the longitudinal direction D1 in the hollow region on the end portions 11 and 12 side is larger than the cross-sectional area perpendicular to the longitudinal direction D1 in the central region Z1 of the cylindrical member 10. Ends 11 and 12 having an inner diameter larger than the central region Z1 are first viscous body reservoirs 13 to be described later.

  End portions 11 and 12 of the cylindrical member 10 are sealed by a sealing portion 14. The sealing portion 14 is formed of a nonmagnetic material such as ABS, POM, PC, LCP, acrylic rubber, nitrile rubber, or silicon rubber, and is disposed at the end portions 11 and 12 of the cylindrical member 10. The sealing portion 14 prevents a viscous body 40 described later from leaking outside the cylindrical member 10.

  Coils 20 </ b> A, 20 </ b> B, and 20 </ b> C made of a conductive material and a non-magnetic material are provided on the outer peripheral surface of the cylindrical member 10 so that the winding directions of the adjacent coils 20 are opposite to each other.

  The mover 30 is disposed so as to be movable along the longitudinal direction D <b> 1 of the cylindrical member 10 within the cylindrical member 10. That is, the cylindrical member 10 guides the mover 30 in one direction. The mover 30 reciprocates inside the coil 20.

  Since the mover 30 moves inside the cylindrical member 10, the inner diameter of the cylindrical member 10 becomes larger than the outer diameter of the cross section of the mover 30 perpendicular to the longitudinal direction D1. The cylindrical member 10 and the mover 30 are preferably arranged without a gap in a cross section perpendicular to the longitudinal direction D1, but a gap is created in design. A viscous body 40 is provided on the side surface of the mover 30 so as to fill this gap.

  The structure of the needle | mover 30 and the cylindrical member 10 is demonstrated with reference to FIG. 1 and FIG. FIG. 2 is an enlarged view of the vibration power generator 1 when the mover 30 moves to the vicinity of the end 11 of the cylindrical member 10. As shown in FIG. 1, the mover 30 includes three permanent magnets 31 </ b> A, 31 </ b> B, 31 </ b> C and a fastening member 32. Three hollow and cylindrical permanent magnets 31 </ b> A, 31 </ b> B, and 31 </ b> C are caulked and fixed by a fastening member 32. In this fixed state, each of the permanent magnets 31A, 31B, 31C is arranged so that the same pole as that of the adjacent permanent magnets 31A, 31B, 31C is opposed, and the magnetization direction of the permanent magnets 31A, 31B, 31C is the longitudinal direction. Turn to D1. When the permanent magnets 31A, 31B, and 31C are arranged with the same poles facing each other, repulsive force acts on each of the permanent magnets 31A, 31B, and 31C. The fastening member 32 fastens the permanent magnets 31A, 31B, and 31C in a state where this repulsive force is acting on each of the permanent magnets 31A, 31B, and 31C. When the permanent magnets 31A, 31B, and 31C are arranged so that the same poles are opposed to each other, the magnetic fluxes of the permanent magnets 31A, 31B, and 31C are directed in the direction intersecting the longitudinal direction D1, and thus the coils 20A, 20B, The magnetic flux density across 20C increases.

  As shown in FIG. 2, the permanent magnets 31 </ b> A, 31 </ b> B, and 31 </ b> C have shapes such that the cross-sectional area at both ends in the longitudinal direction is smaller than the cross-sectional area at the center in the longitudinal direction. Accordingly, when the permanent magnets 31 </ b> A, 31 </ b> B, and 31 </ b> C are arranged with the same poles facing each other, the concave groove 33 is formed between the adjacent permanent magnets 31. This concave groove 33 is the second viscous material reservoir of the present invention. In the following description, the three permanent magnets 31 </ b> A, 31 </ b> B, and 31 </ b> C may be described as the permanent magnet 31.

  The fastening member 32 includes a through hole 34 inside. When the mover 30 is disposed inside the cylindrical member 10, the through hole 34 extends along the longitudinal direction D1.

  The permanent magnet 31 is a permanent magnet such as a neodymium magnet or a ferrite magnet. The fastening member 32 is formed of a nonmagnetic material such as an austenitic stainless material, an aluminum alloy material, or brass.

  As shown in FIG. 1, the shield member 50 is disposed outside the cylindrical member 10 and the coil 20 so that the cylindrical member 10 and the longitudinal direction D1 coincide with each other. The shield member 50 is made of a magnetic material such as iron, silicon steel, permalloy, sendust, or soft ferrite.

  The magnetic flux of the permanent magnet 31 provided in the mover 30 is attracted to the shield member 50 made of a magnetic material. Since the coil 20 is disposed on the outer peripheral surface of the cylindrical member 10, the magnetic flux density across the coil 20 increases. Therefore, the power generation amount can be improved by arranging the shield member 50 outside the coil 20. In addition, it is possible to suppress adverse effects on components that may cause malfunction due to the influence of magnetic force, such as electronic components, for example, where the magnetic force of the permanent magnet 31 is located outside the shield member 50.

  A problem when the viscous body 40 is not provided will be described with reference to FIG. 3 is a cross-sectional view in the AA direction of FIG. 1 when the viscous body 40 is not provided. In FIG. 3, the coil 20 is not shown. As shown in FIG. 3, when the shield member 50 is disposed outside the coil 20, that is, when the shield member 50 is disposed in a range where the influence of the magnetic force of the permanent magnet 31 is exerted, as shown in FIG. The attractive force Fm2, the attractive force Fm3, and the attractive force Fm4 act between the shield member 50 and the permanent magnet 31, respectively. Each attractive force depends on the distance between the permanent magnet 31 and the shield member 50. The permanent magnet 31 is arranged so that the center thereof coincides with the shield member 50. However, since the mover 30 reciprocates in the longitudinal direction D1 of the cylindrical member 10 inside the cylindrical member 10, the inner diameter of the cylindrical member 10 needs to be designed larger than the outer diameter of the mover 30. Thereby, a gap is generated between the cylindrical member 10 and the mover 30. If the center Cm of the permanent magnet 31 deviates from the center Cs of the shield member 50 due to impact or gravity from the user, the balance of the attractive force Fm1, the attractive force Fm2, the attractive force Fm3, and the attractive force Fm4 is lost. As a result, a phenomenon in which the permanent magnet 31 is pulled toward the shield member 50, that is, magnetic adhesion occurs. Thereby, the movement of the needle | mover 30 is inhibited and electric power generation amount falls. In particular, when the mover 30 is arranged with a plurality of permanent magnets 31 with the same poles facing each other as shown in FIGS. 1 and 2, the magnetic flux density toward the shield member 50 increases, so the balance of attractive force is lost. Becomes significantly larger.

  On the other hand, the case where the viscous body 40 by this invention is provided is demonstrated with reference to FIG. FIG. 4 is a cross-sectional view in the AA direction of FIG. 1 when the viscous body 40 is provided. In the gap between the cylindrical member 10 and the mover 30, the viscous body 40 functions as a spacer. Thereby, the center Cm of the permanent magnet 31 is closer to the center Cs of the shield member 50 than the vibration power generator in which the viscous body 40 is not provided. As a result, the attractive force Fm1, the attractive force Fm2, the attractive force Fm3, and the attractive force Fm4 acting between the shield member 50 and the permanent magnet 31 are balanced, and the bias of the attractive force is reduced as compared with the vibration generator in which the viscous body 40 is not provided. To do. Thereby, it is improved that the movement of the mover 30 by magnetic attachment is inhibited. Therefore, the power generation amount is improved.

  1 to 4, the viscous body 40 is a continuous body. However, the viscous body 40 is not limited thereto, and may function as a spacer between the cylindrical member 10 and the mover 30 while being dispersed.

  The viscous body 40 is gel-like. Specifically, in the viscous body 40, the liquid dispersion medium has a high viscosity due to the dispersoid network, and the entire system is in a semi-solid or solid state. Examples of the viscous body 40 include jelly and grease. Grease is a kind of lubricant and has a higher viscosity and lower fluidity than oil, and therefore exhibits semi-solid or semi-fluidity at room temperature. Basically, a thickening agent such as soap containing at least one of calcium, sodium, lithium and aluminum is uniformly diffused in a liquid lubricating oil to form a jelly. The grease is not limited to this, but includes silicon grease, fluoroether grease, and apizon grease.

  With reference to FIG. 2, the first viscous body reservoir 13 and the concave groove 33 which is the second viscous body reservoir will be described. When the viscous body 40 supplied to the gap between the mover 30 and the cylindrical member 10 is pushed out from the gap and decreases as the mover 30 reciprocates, the mover 30 becomes the first viscous body reservoir 13. The viscous body 40 is supplied from the first viscous body reservoir 13 to the mover 30 and is replenished to fill the gap. The viscous body 40 is also supplied to the movable element 30 from the concave groove 33.

  The end of the first viscous material reservoir 13 that is closer to the coil 20 is tapered. The tapered end portion is a tapered portion 15. In other words, the taper portion 15 is configured so that the cross-sectional area in the vertical direction of the end of the first viscous material reservoir 13 near the coil 20 gradually increases in the direction from the coil 20 toward the sealing portion 14. It is formed.

  The length L2 in the longitudinal direction D1 of the first viscous material reservoir 13 is 0.5 times the length L1 in the longitudinal direction D1 of the mover 30.

  When the mover 30 is positioned at the end portions 11 and 12 of the cylindrical member 10 in which the first viscous material reservoir 13 is disposed, the movable member 30 is disposed closest to the first viscous material reservoir 13 in the longitudinal direction D1 of the cylindrical member 10. A concave groove 33 formed between the first permanent magnet 31 </ b> A and the second permanent magnet 31 </ b> B adjacent to the first permanent magnet 31 </ b> A faces the first viscous body reservoir 13.

  An example of assembly of the vibration generator 1 will be described with reference to FIG. The sealing portion 14 is inserted into the bottom surface of the shield member 50. Next, in a state where the coil 20 is provided on the outer peripheral surface of the cylindrical member 10, the cylindrical member 10 is inserted into the shield member 50, and the end portion 12 of the cylindrical member 10 is disposed in contact with the sealing portion 14. . Next, the mover 30 provided with the viscous body 40 on the side surface is disposed inside the cylindrical member 10. Next, another sealing portion 14 is inserted into the shield member 50 and disposed in contact with the end portion 11 of the cylindrical member 10. Thereby, the end portions 11 and 12 of the cylindrical member 10 are sealed by the pair of sealing portions 14 and 14. At this time, metal wires from both ends of the coil 20 are inserted into holes (not shown) of the sealing portion 14. Next, metal wires from both ends of the coil 20 are connected to the circuit unit 60. The circuit unit 60 includes a rectifier circuit and a storage circuit. The rectifier circuit is a circuit that rectifies current generated when the mover 30 moves inside the cylindrical member 10. The storage circuit is a circuit that stores power from the current rectified by the rectifier circuit. Two conductors from the storage circuit of the circuit unit 60 are combined into one cable 70. Next, the circuit unit 60 to which the metal wires from both ends of the coil 20 are connected is fixed inside the shield member 50 with the circuit holding member 61 functioning as a cushioning material interposed therebetween. The cable 70 is inserted through a hole formed in the center of the lid 51. Next, the lid 51 into which the cable 70 is inserted through the hole is fixed to the shield member 50. The lid 51 is fixed to the shield member 50 by screwing or a fixing method such as an adhesive. A connection terminal that can be inserted into an insertion port of an electronic device such as a mobile phone or an electronic book terminal is provided at the tip of the cable 70. Electric power is supplied to the electronic device from this connection terminal.

  FIG. 5 shows, as the viscous body 40, “Sumitec 201 manufactured by Sumiko Lubricant Co., Ltd. (described as Ga in FIG. 5)” and “Foil BG-10KS manufactured by Kanto Kasei Kogyo Co., Ltd. (described as Gb in FIG. 5)”. "Floyl BG-1M manufactured by Kanto Kasei Kogyo Co., Ltd. (described as Gc in FIG. 5)", "Foil BG-230J manufactured by Kanto Kasei Kogyo Co., Ltd. (described as Gd in FIG. 5)", "Kanto Kasei Kogyo" 6 is a graph showing the amount of power generated when “HANARL 321Q manufactured by Co., Ltd. (described as Ge in FIG. 5)” is provided between the mover 30 and the cylindrical member 10. In FIG. 5, the power generation amount when the viscous body 40 is not provided is shown as Gn. These are data when the vibration generator 1 is reciprocated at a frequency of 5 Hz and an amplitude of 50 mm. In order to calculate the amount of power generation, metal wires from both ends of the coil 20 were connected to an oscilloscope, and the open circuit voltage across the coil 20 was measured. The average power generation amount is obtained from the mean square deviation of the open-circuit voltage and the electric resistance between both ends of the coil 20. A value obtained by dividing the power generation amount when each viscous body 40 is provided by the power generation amount when no viscous body 40 is provided is shown in FIG. The power generation amount when the viscous body 40 is not provided is “1”. The electrical resistance between both ends of the coil 20 is approximately 100Ω.

  The vibration generator used to obtain the data shown in FIG. 5 includes a cylindrical member 10A shown in FIG. The cylindrical member 10A includes a large number of small ribs 16A1 and a large number of large ribs 16A2 at the end portions 11A and 12A corresponding to the end portions 11 and 12 shown in FIG. These ribs 16A1 and 16A2 function so that the center Cs of the shield member 50 and the center Cp of the cylindrical member 10 shown in FIG. More specifically, the cylindrical member 10 provided with the ribs 16A1 and 16A2 is press-fitted into the shield member 50. The ribs 16 </ b> A <b> 1 and 16 </ b> A <b> 2 have elasticity, and when the cylindrical member 10 </ b> A is disposed inside the shield member 50, the cylindrical member 10 </ b> A is pressed against the shield member 50 and has a certain positional relationship with the shield member 50. Retained. By maintaining this fixed positional relationship, the distance between the center Cm of the permanent magnet 31 and the center Cs of the shield member is shortened, and the two centers are located close to each other. In the present embodiment, the inner diameter of the cylindrical member 10 is φ8.2, and the outer diameter of the permanent magnet 31 is φ8.0.

  As shown in FIG. 5, when the viscous body 40 is provided between the mover 30 and the cylindrical member 10, the power generation amount is improved approximately five times compared to when the viscous body 40 is not provided.

  FIG. 7 shows a vibration generator in which the shield member 50 is not provided. When the viscous body 40 is provided between the mover 30 and the cylindrical member 10 (described as Gc1 in FIG. 7), the viscous body 40 is movable. It is the graph which showed the electric power generation amount when it is not provided between the element | child 30 and the cylindrical member 10 (it describes as Gn1 in FIG. 7). In this graph, “Floile BG-1M manufactured by Kanto Kasei Kogyo Co., Ltd.” showing the result of the largest power generation amount in the experiment shown in FIG. Similarly to FIG. 5, a value obtained by dividing the power generation amount when the viscous body 40 is provided by the power generation amount when the viscous body 40 is not provided is shown as the power generation amount when the viscous body 40 is provided. As shown in FIG. 7, in the vibration power generator in which the shield member 50 is not provided, when the viscous body 40 is provided, the amount of power generation is slightly reduced as compared with the case where the viscous body 40 is not provided. From this result, when the shield member 50 is not provided, it is considered that the improvement of the power generation amount cannot be expected by providing the viscous body 40. This is considered to be because the viscous body 40 has a resistance that hinders the movement of the mover 30.

  5 and 7 show the results of experiments using a vibration power generator including a cylindrical member 10A including ribs 16A1 and 16A2. In the experimental data illustrated in FIG. 9, the end portions 11 and 12 illustrated in FIG. An experiment was performed using a vibration generator including a cylindrical member 10B in which the ribs 16A1 and 16A2 are not provided at the corresponding end portions 11B and 12B. FIG. 8 is a perspective view of a cylindrical member 10B that is not provided with a rib. Since the cylindrical member 10B does not include a rib, the center Cs of the shield member 50 shown in FIG. 4 and the center Cp of the cylindrical member 10B are less likely to coincide with the cylindrical member 10A. Thereby, the distance between the center of the permanent magnet of the vibration generator including the cylindrical member 10B provided with no rib and the center of the shield member is the same as that of the permanent magnet of the vibration generator including the cylindrical member 10A including the ribs 16A1 and 16A2. It is difficult to be shorter than the distance between the center Cm and the center Cs of the shield member 50.

  FIG. 9 includes a shield member 50 and a cylindrical member 10B, and includes a power generation amount (described as Gn2 in FIG. 9) in a vibration generator in which the viscous body 40 is not provided, a shield member 50, and the cylindrical member 10B. The amount of power generation in the vibration generator 1 provided with the body 40 (referred to as Gc2 in FIG. 9) and the amount of power generation in the vibration generator 1 provided with the cylindrical member 10A provided with the ribs 16A1 and 16A2 (see FIG. 9). Is a graph comparing Gc). In the experiment shown in FIG. 9, “Floile BG-1M manufactured by Kanto Kasei Kogyo Co., Ltd.” that showed the result of the largest power generation amount in the experiment shown in FIG. Also in this experiment, the power generation amount in Gc2 and the power generation amount in Gc are shown with the power generation amount in the vibration power generator provided with the shield member 50 and the cylindrical member 10B and not provided with the viscous body 40 being “1”. As shown in FIG. 9, the amount of power generation is provided with a vibration generator (Gn2 whose measurement result is shown on the left side of FIG. 9) provided with the cylindrical member 10B and not provided with the viscous body 40, and the cylindrical member 10B. The vibration generator 1 (Gc2 whose measurement result is shown in the center of FIG. 9) and the cylindrical generator 10A provided with the rib 16A and the viscous body 40 are provided (Gc whose measurement result is shown on the right side of FIG. 9). ) In order. From this result, among the above three types of vibration generators, the vibration generator 1 provided with the cylindrical member 10A provided with the ribs 16A1 and 16A2 and provided with the viscous body 40 showed the best power generation amount.

  As shown in FIGS. 5 and 7, the provision of the viscous body 40 improves the power generation amount only in the vibration power generator provided with the shield member 50. As shown in FIG. 9, the center of the shield member 50 is determined from the difference in the amount of power generation between the vibration generator including the cylindrical member 10A provided with the ribs 16A1 and 16A2 and the vibration generator including the cylindrical member 10B not provided with the rib. It can be said that the power generation amount is improved in the configuration in which the distance between Cs and the center Cm of the permanent magnet 31 is short. From the experimental results shown in FIG. 9, in the vibration power generator provided with the shield member 50, the provision of the viscous body 40 shortens the distance between the center Cs of the shield member 50 and the center Cm of the permanent magnet, thereby increasing the amount of power generation. To do. Further, if the viscous body 40 is appropriately selected, even if the viscous body 40 is provided between the mover 30 and the cylindrical member 10, a major obstacle to the movement of the mover 30 within the cylindrical member 10. It will not be. Since the grease given as an example of the viscous body 40 is generally provided to improve the slidability, the movement of the mover 30 due to friction is hardly inhibited. In the case where the shield member 50 shown in FIG. 7 is not provided, the increase in the amount of power generation due to the provision of the viscous body 40 shown in FIG. It can be said that the dominant factor is that the distance between the center Cs of the shield member 50 and the center Cm of the permanent magnet 31 is shortened, and the influence of magnetic adhesion is reduced.

(Second Embodiment)
A second embodiment will be described with reference to FIG. About the structure equivalent to the vibration generator 1 of 1st Embodiment, the same number or symbol is attached | subjected and demonstrated. The vibration power generator 100 according to the second embodiment is provided with a guide core 101 such that the center thereof coincides with the center Cs of the shield member 50 as in the power generation device disclosed in Japanese Patent Application Laid-Open No. 2010-115076. This guide core 101 is an example of the guide member of the present invention.

  The guide core 101 is inserted through the through hole 102 of the fastening member 32 of the mover 30. At this time, the viscous body 40 is provided inside the through hole 102 or on the outer peripheral surface of the guide core 102. Thereby, the viscous body 40 is provided between the guide core 101 and the mover 30. By sealing the end portions 11 and 12 of the cylindrical member 103 with the sealing portion 14, both ends of the guide core 101 are fixed so as to coincide with the center of the cylindrical member 103. More specifically, a fixing hole for fixing the guide core 101 is disposed at the center of the sealing portion 14. The guide core 101 is fixed to the sealing portion 14 by fitting the end portion of the guide core 101 into the fixing hole. The cylindrical member 103 holds the coil 20 in a predetermined position. The mover 30 is disposed inside the cylindrical member 103.

  A viscous body 40 is provided between the mover 30 and the guide core 101. Thereby, the mover 30 reciprocates with the guide core 101 in a direction orthogonal to the reciprocating direction while maintaining an interval corresponding to the thickness of the viscous body 40, and moves to the shield member 50 during the reciprocating movement. Do not come close.

  Since the mover 30 moves inside the cylindrical member 103, the inner diameter of the cylindrical member 103 is larger than the outer diameter of the cross section of the mover 30 perpendicular to the longitudinal direction D1. The cylindrical member 103 and the mover 30 are preferably arranged without a gap in a cross section perpendicular to the longitudinal direction D1, but a gap is created in design. By this gap, an air flow path inside the cylindrical member 103 is formed when the mover 30 moves inside the cylindrical member 103.

  The diameters of both ends 101 </ b> A and 101 </ b> B of the guide core 101 are smaller than the diameter of the central region of the guide core 101. Both ends 101A and 101B of the guide core 101 smaller than the diameter of the central region are the first viscous material reservoir of the present invention.

[Effect of the embodiment]
According to the vibration power generator 1 of the first embodiment, the viscous body 40 is provided between the mover 30 and the cylindrical member 10. Thereby, the mover 30 reciprocates with the cylindrical member 10 in the direction orthogonal to the reciprocating movement direction while maintaining an interval corresponding to the thickness of the viscous body 40, and moves to the shield member 50 during the reciprocating movement. Approaching is suppressed. As a result, the resultant force of the attractive force Fm acting on the permanent magnet 31 is reduced inside the shield member 50. Therefore, the influence of magnetic adhesion is suppressed more than the vibration generator in which the viscous body 40 is not provided between the mover 30 and the cylindrical member 10. Accordingly, it is possible to suppress a decrease in the amount of power generation due to the influence of magnetic adhesion.

  According to the vibration power generator 100 of the second embodiment, the viscous body 40 is provided between the mover 30 and the guide core 101. Thereby, the mover 30 reciprocates with the guide core 101 in a direction orthogonal to the reciprocating direction while maintaining an interval corresponding to the thickness of the viscous body 40, and moves to the shield member 50 during the reciprocating movement. Approaching is suppressed. As a result, the resultant force of the attractive force acting on the permanent magnet 31 is reduced inside the shield member 50. Therefore, the influence of magnetic adhesion is suppressed more than the vibration generator in which the viscous body 40 is not provided between the mover 30 and the guide core 101. Accordingly, it is possible to suppress a decrease in the amount of power generation due to the influence of magnetic adhesion.

  According to the vibration generator 1 of the first embodiment, the cylindrical member 10 that houses the mover 30 therein and the sealing portion 14 that seals the end portions 11 and 12 of the cylindrical member 10 are provided. The mover 30 includes a through hole 34 along the longitudinal direction D1 of the cylindrical member 10. In a vibration generator having a viscous body 40 provided between the mover 30 and the cylindrical member 10 and including a mover that does not include the through hole 34, when the mover moves, the air inside the cylindrical member is moved to the mover. A flow path for moving in the direction opposite to the moving direction is required. However, since the viscous body is provided between the mover and the cylindrical member, the flow path of the air inside the cylindrical member is narrowed and blocked in some cases, and the movement of the air is inhibited. Thereby, when the mover moves inside the cylindrical member, the air resistance acting on the mover increases. As a result, the movement of the mover is hindered and the power generation amount is reduced. On the other hand, in the vibration power generator 1 in which the viscous body 40 is provided between the cylindrical member 10 and the movable element 30 includes the through hole 34, the movable element 30 penetrates when the movable element 30 moves inside the cylindrical member 10. Air moves through the holes 34. Thereby, the air resistance which acts on the needle | mover 30 reduces. As a result, it is possible to suppress the movement of the mover 30 from being inhibited. Therefore, it is possible to suppress a decrease in the amount of power generation. Further, the sealing portion 14 seals both ends of the cylindrical member 10. Thereby, when the viscous body 40 moves from between the mover 30 and the cylindrical member 10, the viscous body 40 can be prevented from leaking outside the cylindrical member 10.

  According to the vibration power generator 1 of the first embodiment, the cylindrical member 10 includes the first viscous material reservoir 13 for collecting the viscous material 40. When the mover 30 is positioned to face the first viscous body reservoir 13, the viscous body 40 is supplied from the first viscous body reservoir 13 to the movable body 30. As the mover 30 moves in one direction, the viscous body 40 may move from between the mover 30 and the cylindrical member 10. In this case, in the vibration power generator that does not include the first viscous material reservoir, as the mover moves in one direction, the amount of the viscous material between the mover and the cylindrical member decreases, and the permanent magnet and the shield member. And the effect of magnetic attachment becomes stronger. As a result, the power generation amount decreases. On the other hand, in the vibration power generator 1 provided with the first viscous body reservoir 13, even when the viscous body 40 moves from between the movable element 30 and the cylindrical member 10, the movable element 30 is not attached to the first viscous body. When facing the reservoir 13, the viscous body 40 is supplied to the mover 30 again. Thereby, it is suppressed that the distance of the permanent magnet 31 and the shield member 50 becomes near as the needle | mover 30 moves to one direction. Therefore, it is possible to suppress a decrease in the amount of power generation. In particular, in the vibration power generator 1, since the mover 30 moves in one direction to generate power, power generation and supplying the viscous body 40 to the mover 30 are performed simultaneously. That is, it is not necessary to provide a configuration for performing the operation only for supplying the viscous body 40 to the mover 30 independently of the power generation operation, and the configuration can be simplified.

  According to the vibration power generator 1 of the second embodiment, the first viscous material reservoir is the both ends 101A and 101B of the guide core 101. When the mover 30 is positioned facing the first viscous body reservoir, the viscous body 40 is supplied from the first viscous body reservoir to the movable element 30. As the mover 30 moves in one direction, the viscous body 40 may move from between the mover 30 and the guide core 101. In this case, in the vibration power generator that does not include the first viscous material reservoir, as the mover moves in one direction, the amount of the viscous material between the mover and the guide core decreases, and the permanent magnet and the shield member. And the effect of magnetic attachment becomes stronger. As a result, the power generation amount decreases. On the other hand, in the vibration power generator 100 including the first viscous material reservoir, even when the viscous material 40 moves from between the movable element 30 and the guide core 101, the movable element 30 remains in the first viscous material reservoir. When it opposes, the viscous body 40 is supplied to the needle | mover 30 again. Thereby, it is suppressed that the distance of the permanent magnet 31 and the shield member 50 becomes near as the needle | mover 30 moves to one direction. Therefore, it is possible to suppress a decrease in the amount of power generation. In particular, in the vibration power generator 1, since the mover 30 moves in one direction to generate power, power generation and supplying the viscous body 40 to the mover 30 are performed simultaneously. That is, it is not necessary to provide a configuration for performing the operation only for supplying the viscous body 40 to the mover 30 independently of the power generation operation, and the configuration can be simplified.

  According to the vibration generator 1 of the first embodiment, the first viscous body reservoir 13 is disposed at both ends of the cylindrical member 10, and the first viscous body reservoir 13 is disconnected in a direction perpendicular to the longitudinal direction of the cylindrical member 10. The area is larger than the cross-sectional area of the cylindrical member 10 in the vertical direction. In the process in which the mover 30 moves inside the cylindrical member 10 in which the end portions 11 and 12 are sealed by the sealing portion 14, the moving speed of the mover 30 decreases near the sealing portion 14. This is because the mover 30 reverses the moving direction in the vicinity of the sealing portion 14. Therefore, in the configuration in which the first viscous body reservoir is arranged at the center of the cylindrical member, when the moving speed of the mover passing through the central region is increased, the viscous body is sufficiently interposed between the movable element and the cylindrical member. It becomes difficult to be supplied. On the other hand, in the configuration in which the first viscous body reservoir 13 is disposed at at least one end of the cylindrical member 10, the stay time of the mover 30 near the sealing portion 11 is longer than that in the central region Z1, There is a time when the viscous body 40 is supplied to the gap between the mover 30 and the cylindrical member 10 and sufficiently spreads. Thereby, the viscous body 40 is easily supplied to the mover 30. As a result, the distance between the permanent magnet 31 and the shield member 50 is further suppressed. Accordingly, it is possible to further suppress a decrease in the amount of power generation.

  According to the vibration power generator 1 of the first embodiment, the first viscous body reservoir 13 is disposed at both ends of the cylindrical member 10. The length L2 of the first viscous material reservoir 13 in the longitudinal direction D1 is 0.5 times the length L1 of the movable element 30 in the longitudinal direction D1. Thereby, when the mover 30 moves to the vicinity of both ends of the cylindrical member 10, the viscous body 40 is supplied to the mover 30. Since the location of the movable element 30 to which the viscous body 40 is supplied corresponds to the sum of the lengths of the first viscous body reservoirs 13 arranged at both ends, the place where the viscous body 40 is supplied becomes wider. . As a result, the distance between the permanent magnet 31 and the shield member 40 is further suppressed. Accordingly, it is possible to further suppress a decrease in the amount of power generation. When the mover 30 is positioned to face the first viscous material reservoir 13, the central position of the movable element 30 in the longitudinal direction D1 is the end of the first viscous material reservoir 13 on the central region Z1 side of the cylindrical member 10. Placed in the section. Thus, when the mover 30 is positioned opposite to the first viscous body reservoir 13, the first viscous body reservoir 13 having a cross-sectional area larger than the cross-sectional area of the cylindrical member 10 causes the mover 30 to be oriented in one direction. It becomes difficult to slip off. As a result, it is possible to suppress the movement of the mover 30 from being hindered due to the orientation of the mover 30 being deviated from one direction. Accordingly, it is possible to further suppress a decrease in the amount of power generation.

  According to the vibration power generator 1 of the first embodiment, the first viscous material reservoir 13 is disposed between the sealing portion 11 and the coil 20 in the longitudinal direction D1. The cross-sectional area of the end portion of the first viscous material reservoir 13 near the coil 20 in the direction perpendicular to the longitudinal direction D1 includes a region that gradually increases in the direction from the coil 20 toward the sealing portion 11. That is, the end of the first viscous material reservoir 13 is inclined with respect to the longitudinal direction D1. That is, the first viscous body reservoir 13 includes a tapered portion 15 at the end. When the mover 30 moves inside the cylindrical member 10 whose ends 11 and 12 are sealed by the sealing portion 14, the viscous body 40 moves from between the mover 30 and the cylindrical member 10, and the cylindrical member 10. There is a possibility of collecting at both ends. The viscous body 40 accumulated at both ends of the cylindrical member 10 receives a force including a component in the same direction as the movement direction of the mover 30 from the mover 30 when contacting the mover 30. When the viscous body 40 receiving this force comes into contact with the sealing portion 11, a reaction force in a direction opposite to the direction of the force received from the mover 30 is received from the sealing portion 11. Due to this reaction force, the viscous body 40 moves in the direction of the reaction force. Next, when the viscous body 40 moves in the direction of the reaction force and comes into contact with the end portions 11 and 12 closer to the coil 20, a component in a direction perpendicular to the longitudinal direction of the cylindrical member 10 is obtained from the end portions 11 and 12. Receiving reaction force including. Due to the reaction force from the end portions 11 and 12, the viscous body 40 easily moves toward the side surface of the mover 30. As a result, the viscous body 40 is easily supplied to the mover 30. Therefore, the distance between the permanent magnet 31 and the shield member 50 is further suppressed. Accordingly, it is possible to further suppress a decrease in the amount of power generation.

  According to the vibration generator 1 of the first embodiment, the mover 30 includes the plurality of permanent magnets 31 and the fastening member 32 that fastens the plurality of permanent magnets. The mover 30 includes a concave groove 33 formed between adjacent permanent magnets 31. As a result, the viscous body 40 is supplied to the mover 30 from the second viscous body reservoir formed by the groove 33. Therefore, the distance between the permanent magnet 31 and the shield member 50 is further suppressed. Accordingly, it is possible to further suppress a decrease in the amount of power generation.

  According to the vibration generator 1 of the first embodiment, when the mover 30 is located at the end of the cylindrical member 10 where the first viscous body reservoir 13 is disposed, the movable element 30 is disposed closest to the first viscous body reservoir 13 side. A concave groove 33 formed between the first permanent magnet 31 </ b> A and the second permanent magnet 31 </ b> B adjacent to the first permanent magnet 31 </ b> A faces the first viscous body reservoir 13. Thereby, when the mover 30 moves to the end portions 11 and 12 where the first viscous body reservoir 13 of the cylindrical member 10 is disposed, the viscous body 40 is moved from the first viscous body reservoir 13 to the movable groove 30 and the concave groove. 33. The viscous body 40 supplied to the second viscous body reservoir is also supplied to the movable body 30 even when the movable element 30 is not positioned facing the first viscous body reservoir 13. As a result, the distance between the permanent magnet 31 and the shield member 40 is further suppressed. Accordingly, it is possible to further suppress a decrease in the amount of power generation.

  According to the vibration power generator 1 of the first embodiment, the cylindrical member 10A includes the ribs 16A1 and 16A2 having elasticity on the side surfaces. As a result, the distance between the center Cm of the permanent magnet 31 and the center Cs of the shield member 50 is shorter than the distance between the center of the permanent magnet and the center of the shield member of the vibration generator including the cylindrical member 10B without the rib. Cheap. As a result, the attractive force Fm1, the attractive force Fm2, the attractive force Fm3, and the attractive force Fm4 acting between the shield member 50 and the permanent magnet 31 can be easily balanced. Accordingly, it is possible to further suppress a decrease in the amount of power generation.

[Modification 1]
In the first embodiment, in the cylindrical member 10, the end portions 11 and 12 having a large inner diameter are formed as the first viscous material reservoir 13. In the second embodiment, the first viscous body reservoir is formed by having a cross-sectional area smaller than the central region in the longitudinal direction D1 at both ends 101A and 101B of the guide core 101. However, the present invention is not limited to this, and the first viscous material reservoir that is a concave groove may be provided in the cylindrical member 10 or the guide core 101 along the longitudinal direction D1. Further, the first viscous body reservoir and the second viscous body reservoir are not essential in the present invention, and may be a vibration generator that does not include the first viscous body reservoir and the second viscous body reservoir.

[Modification 2]
In the first embodiment, the first viscous material reservoir 13 need not be disposed at both ends of the cylindrical member 10 and may be disposed at least at one end. In addition, the first viscous material reservoir 213 may be disposed in the central region Z2 of the cylindrical member 210 as in the cylindrical member 210 shown in FIG. Not only this but a 1st viscous body pool may be arrange | positioned in the arbitrary areas of the cylindrical member to which the needle | mover 30 reciprocates. In FIG. 11, only the cylindrical member 210 and the coil 20 are shown. In the second embodiment, the end portions 101A and 101B having a small cross-sectional area as the first viscous material reservoir need not be disposed at both ends of the guide core 101, and may be disposed at least at one end. In addition, as shown in FIG. 12, the first viscous body reservoir may be disposed in the central region of the guide core 301. In FIG. 12, only the guide core 301, the cylindrical member 303, and the coil 20 are shown. For example, a slit-like groove along the longitudinal direction may be formed as the first viscous body reservoir on the inner surface of the cylindrical member or the outer surface of the guide core. In addition, a slit-like groove perpendicular to the longitudinal direction may be formed on the inner surface of the cylindrical member or the guide core as the first viscous body reservoir. That is, the first viscous material reservoir may be provided in the area of the circular member or the guide core where the mover reciprocates.

[Modification 3]
In 1st Embodiment and 2nd Embodiment, although the cylindrical member 10 was used as the cylindrical member, it is not restricted to this. The cross section perpendicular to the longitudinal direction D1 of the cylindrical member may be an ellipse, a square, a pentagon, or a hexagon.

[Modification 4]
In 1st Embodiment and 2nd Embodiment, although the cross section perpendicular | vertical to the longitudinal direction D1 of the permanent magnet 31 was a circle, it is not restricted to this. Moreover, although the cross section perpendicular | vertical to the longitudinal direction D1 of the shield member 50 was mentioned as the circle, it is not restricted to this. The cross section perpendicular to the longitudinal direction D1 of the permanent magnet 31 and the cross section perpendicular to the longitudinal direction D1 of the shield member 50 may be of any shape, but the effect of magnetic adhesion is when the cross sectional shapes of these both are similar. However, it is easy to be dispersed. However, as in the first embodiment and the second embodiment, the cross-section perpendicular to the longitudinal direction D1 of the permanent magnet 31 and the cross-section perpendicular to the longitudinal direction D1 of the shield member 50 are circular, and the attractive force Fm is respectively. Is isotropic with respect to the centers Cs and Cm, and this is effective in that the influence of magnetic adhesion is easily dispersed.

[Modification 5]
In 1st Embodiment, although the cylindrical member 10 is a guide member of a needle | mover, it is not restricted to this. A vibration generator having a configuration in which the shield member 50 whose both ends are not sealed is arranged inside the cylindrical member 10, the coil 20 is arranged inside the shield member 50, and the mover 30 moves inside the coil 20 may be used. . In this case, the coil 20 itself or a member that holds the coil 20 is an example of the guide member of the present invention.

[Modification 6]
In 1st Embodiment, although the needle | mover 30 is provided with the through-hole 34, it is not restricted to this. A mover that does not include a through hole may be included in the vibration generator. In the second embodiment, the guide core 101 is inserted through the through hole 102, and the viscous body 40 is provided between the guide core 101 and the mover 30. As a result, when the mover 30 moves inside the cylindrical member 103, the movement of the air inside the cylindrical member 103 moves in the gap formed between the mover 30 and the cylindrical member 103. If a through hole that forms an air flow path apart from the gap is provided in the mover 30, the air resistance is reduced, and the movement of the mover is hardly inhibited. The air flow path formed separately from the gap is formed such that a groove along the longitudinal direction D1 is formed on the side surface of the permanent magnet 31 or a through hole along the longitudinal direction D1 is formed in the permanent magnet 31 and the fastening member 32. Formed.

[Modification 7]
In 1st Embodiment and 2nd Embodiment, although the several permanent magnet 31 by which the same pole was opposed was fastened by the fastening part 32, it is not restricted to this. A plurality of permanent magnets 31 that are not opposed to the same pole may be fastened by the fastening portion 32, or one permanent magnet may be provided in the vibration generator as a mover.

[Modification 8]
In 1st Embodiment, after the viscous body 40 was provided in the side surface of the needle | mover 30, the needle | mover 30 was arrange | positioned inside the cylindrical member 10, but it is not restricted to this. The movable element 30 may be inserted into the cylindrical member 10 after the viscous body 40 is provided on the inner peripheral surface of the cylindrical member 10. Further, after the viscous body 40 is provided on the inner peripheral surface of the cylindrical member 10 and the side surface of the movable element 30, the movable element 30 may be disposed inside the cylindrical member 10.

[Modification 9]
In 1st Embodiment and 2nd Embodiment, although the coil 20 was arrange | positioned in the center area | region of the cylindrical members 10 and 103, it is not restricted to this. The coil 20 may be disposed in a region on the end 11, 12 side of the outer peripheral surface of the cylindrical members 10, 103, or may be disposed on the inner peripheral surface of the cylindrical members 10, 103. When the coil 20 is disposed on the inner peripheral surfaces of the cylindrical members 10 and 103, the coil 20 guides the mover 30 so as to reciprocate in one direction, so the coil 20 itself is an example of the guide member of the present invention. .

[Modification 10]
In 1st Embodiment and 2nd Embodiment, although the concave groove | channel 33 between the adjacent permanent magnets 31 was formed as a 2nd viscous body pool, it is not restricted to this. As shown in FIG. 13, in the second viscous material reservoir, grooves 433A, 433B, and 433C perpendicular to the longitudinal direction D1 may be formed on the side surfaces of the permanent magnets 431A, 431B, and 431C. In this case, the permanent magnet 431 may have a shape in which the cross-sectional area at both ends in the longitudinal direction is not smaller than the cross-sectional area at the center in the longitudinal direction. In FIG. 13, only the permanent magnets 431A, 431B, 431C, the grooves 433A, 433B, 433C, and the fastening member 32 provided in the mover 430 are shown. Moreover, it is not restricted to this, A groove | channel should just be formed in the arbitrary area | regions of the side surface of a permanent magnet, such as a groove | channel along a longitudinal direction.

[Modification 11]
In the first embodiment, the length L2 of the first viscous material reservoir 13 in the longitudinal direction D1 is 0.5 times the length L1 of the mover 30 in the longitudinal direction D1, but this is not limitative. The length L2 in the longitudinal direction D1 of the first viscous body reservoir 13 may be shorter than 0.5 times the length L1 in the longitudinal direction D1 of the mover 30. In this case, when the mover 30 is positioned to face the first viscous body reservoir 13, this configuration is such that the central position of the mover 30 in the longitudinal direction D <b> 1 is not opposed to the first viscous body reservoir 13. In this case, the viscous body 40 is supplied to the movable element 30 when the movable element 30 moves to the vicinity of both ends of the cylindrical member 10.

[Modification 12]
In the first embodiment and the second embodiment, the two conducting wires from the power storage circuit of the circuit unit 60 are combined into one cable 70. Power is supplied by connecting a connection terminal connected to the end of the cable 70 to an insertion port of an electronic device such as a mobile phone or an electronic book terminal. However, the present invention is not limited to this. The two conducting wires from the power storage circuit may be connected to electrodes arranged at both ends in the longitudinal direction D1, as in a power generation device disclosed in Japanese Patent Application Laid-Open No. 2010-115076. That is, the vibration power generator may have a battery shape including a positive electrode and a negative electrode at both ends. Moreover, as shown in FIG. 1, the circuit part 60 does not need to be arranged inside the shield member 50, and the circuit part 60 may be arranged inside another casing. At this time, the metal wires from both ends of the coil 20 are connected to the circuit unit 60 disposed inside another casing via the covered cable.

DESCRIPTION OF SYMBOLS 1,100 Vibration generator 10,103 Cylindrical member 11,12 End part 13 1st viscous body reservoir 14 Sealing part 15 Tapered part 16A1, 16A2 Rib 20 Coil 30 Moment 31 Permanent magnet 32 Fastening member 33 Groove 34 Through-hole 40 Viscous material 50 Shield member 60 Circuit portion 61 Circuit holding member 70 Cable 101 Guide core Cm Center of permanent magnet Cs Center of shield member Cp
D1 Longitudinal direction Z1 Central region Fm Attraction

Claims (10)

A coil made of a conductive material;
A mover that reciprocates inside the coil and includes a permanent magnet;
A guide member made of a non-magnetic material and guiding the mover to reciprocate in one direction;
A shield member disposed outside the guide member and made of a magnetic material;
A viscous body provided between the mover and the guide member;
A vibration generator comprising: A cylindrical member that accommodates the mover therein;
Sealing portions for sealing both ends of the cylindrical member;
With
The vibration generator according to claim 1, wherein the mover includes a through hole along a longitudinal direction of the guide member. The guide member includes a first viscous material reservoir for collecting the viscous material in a region where the movable element reciprocates,
3. The vibration according to claim 1, wherein when the mover is positioned to face the first viscous material reservoir, the viscous material is supplied from the first viscous material reservoir to the movable element. Generator. A cylindrical member that accommodates the mover therein;
Sealing portions for sealing both ends of the cylindrical member;
With
The guide member is the cylindrical member,
The first viscous material reservoir is disposed at at least one end of the cylindrical member,
4. The vibration power generation according to claim 3, wherein a cross-sectional area of the first viscous material reservoir in a direction perpendicular to a longitudinal direction of the guide member is larger than a cross-sectional area of the cylindrical member in the perpendicular direction. Machine. The first viscous material reservoir is disposed at both ends of the cylindrical member,
5. The vibration generator according to claim 4, wherein a length of the first viscous material reservoir in the longitudinal direction is not more than 0.5 times a length of the movable element in the longitudinal direction. The first viscous material reservoir is disposed between the sealing portion and the coil in the longitudinal direction;
The cross-sectional area in the perpendicular direction of the end portion of the first viscous material reservoir close to the coil includes a region that gradually increases in a direction from the coil toward the sealing portion. 4. The vibration generator according to 4 or 5. The guide member is a cylindrical member that houses the mover therein,
The mover includes a plurality of the permanent magnets and a fastening member that fastens the plurality of permanent magnets,
The vibration generator according to claim 1, wherein the mover includes a second viscous material reservoir formed between the adjacent permanent magnets. The guide member is a cylindrical member that houses the mover therein,
The mover includes a plurality of the permanent magnets and a fastening member that fastens the plurality of permanent magnets,
The mover includes a second viscous body reservoir formed between the adjacent permanent magnets,
The first viscous material reservoir is disposed at at least one end of the cylindrical member,
A cross-sectional area of the first viscous material reservoir in the vertical direction is larger than a cross-sectional area of the cylindrical member in the vertical direction;
When the mover is positioned at an end of the cylindrical member where the first viscous material reservoir is disposed, the first permanent magnet disposed closest to the first viscous material reservoir, and the first permanent magnet The vibration generator according to any one of claims 4 to 6, wherein the second viscous material reservoir formed between the second permanent magnet and the second permanent magnet is opposed to the first viscous material reservoir. . The vibration generator according to any one of claims 1 to 8, wherein the cylindrical member includes a rib having elasticity on a side surface and is provided in pressure contact with the shield member. A cylindrical member arrangement step in which a coil made of a conductive material is provided on the outer peripheral surface and a cylindrical member made of a nonmagnetic material is placed inside a shield member made of a magnetic material;
A viscous body arranging step of providing a viscous body on at least one of the side surface of the mover including the permanent magnet and the inner peripheral surface of the cylindrical member;
A mover placement step of placing the mover inside the cylindrical member;
The manufacturing method of the vibration generator characterized by including this.

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