JP2014064380A - Vibration power generator and lighting equipment - Google Patents

Abstract

A vibration generator and a lighting fixture capable of stably and continuously vibrating a permanent magnet are provided.
A vibration generator (1) includes a guide member (10) that is a cylindrical member, a movable member (50) including a permanent magnet (51) that is movable in the axial direction inside the guide member (10), and the periphery of the guide member (10). A cylindrical member having an inner diameter larger than the outer diameter of the guide member 10 and the central axis of the guide member 10 being substantially the same as the central axis of the guide member 10. The guide member 10 is fixed to the shield member 2 by covering the shield member 2 that electromagnetically shields the inside and the openings at both ends of the shield member 2 and sandwiching the guide member 10 from both sides in the axial direction. A pair of fixing members 3 are provided. The fixing member 3 fixes the guide member 10 to the shielding member 2 in a state where the guide member 10 does not contact the shielding member 2.
[Selection] Figure 1

Description

  The present invention relates to a vibration generator and a lighting fixture that generate electricity by vibration.

  Conventionally, a vibration generator that converts kinetic energy caused by vibration into electric energy is known. For example, in the vibration generator described in Patent Document 1, the permanent magnet vibrates along the axial direction inside a cylindrical guide member around which a coil is wound. As a result, an induced current is generated in the coil as the magnetic field changes. The vibration generator can supply the induced current generated in the coil to an external load.

  In order to prevent the magnetic field generated by the permanent magnet from leaking out of the vibration generator, a cylindrical shielding member that covers and shields the periphery of the permanent magnet from the outside of the guide member may be used. The shielding member can prevent the magnetic field from leaking out of the vibration power generator by confining the magnetic field generated by the permanent magnet. As a material for the shielding member, iron or stainless steel is generally used.

JP 2009-213194 A

  The shielding member made of iron or stainless steel is likely to have a variation in diameter. For this reason, it is difficult to stably fix the guide member in the shield member so that the shield member and the guide member overlap each other concentrically when viewed from the axial direction. When the position of the central axis is different between the shielding member and the guide member, the distance between the shielding member and the permanent magnet is partially reduced. The shielding member is easily magnetized at a portion where the distance from the permanent magnet is small. In this case, there is a problem that the attractive force acts between the magnetically shielded shielding member and the permanent magnet, and the vibration of the permanent magnet may be hindered.

  The objective of this invention is providing the vibration generator and the lighting fixture which can vibrate a permanent magnet stably continuously.

  The vibration generator according to the first aspect of the present invention includes a guide member that is a cylindrical member, a mover provided inside the guide member so as to be movable in the axial direction, and provided with a permanent magnet, and the guide member. And a cylindrical member having an inner diameter larger than the outer diameter of the guide member, the guide member being in a state where the central axis is substantially the same as the central axis of the guide member. The guide member is fixed to the shielding member by covering from the outside, shielding the inside electromagnetically, and covering the openings at both ends of the shielding member and sandwiching the guide member from both sides in the axial direction. A vibration generator including a pair of fixing members, the fixing member covering a opening of an end portion of the shielding member, and an outer peripheral surface of the shielding member extending from the covering portion in the axial direction And at least one of the inner peripheral surfaces, the axis direction A first fixing portion that fixes the shielding member to the fixing member by elastically deforming in a direction intersecting with the fixing member, and the guide member is fixed in a state where the guide member does not contact the shielding member. To do.

  The fixing member fixes the shielding member by elastic deformation of the first fixing portion. The fixing member fixes the guide member by sandwiching the guide member from both sides. Thereby, the guide member is fixed to the shielding member via the fixing member. Therefore, the vibration generator can stably fix the guide member by the fixing member even when there is an individual difference in the diameter of the shielding member. Further, since the guide member does not contact the shielding member, even if there is an individual difference in the diameter of the shielding member, the fixing member is arranged so that the shielding member and the guide member overlap in a concentric manner when viewed from the axial direction. The guide member can be stably fixed. In this case, since the distance between the shielding member and the guide member can be made uniform, the vibration generator can prevent the shielding member from being partially magnetized. The vibration generator can stably and continuously vibrate the permanent magnet in the guide member.

  In the first aspect, the fixing member extends in the axial direction from the cover, contacts the outer peripheral surface of the guide member, and elastically deforms in a direction intersecting the axial direction to fix the guide member. Two fixing parts may be provided. In the first aspect, the first fixing portion may include a slit extending in the axial direction. In the first aspect, the mover may include weights at both ends in the axial direction.

  A lighting fixture according to a second aspect of the present invention includes the vibration generator and a light emitting unit that emits light based on a current induced in the coil as the mover moves in the guide member. . According to the second aspect, the luminaire includes the vibration generator that can stably and continuously vibrate the permanent magnet, so that the light emitting unit can stably emit light for a long time. .

It is sectional drawing of the vibration generator 1 in 1st embodiment. 4 is an enlarged view of a region W1 in the vicinity of the fixing member 3. FIG. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1. FIG. 5 is a diagram for explaining an assembly process of the vibration generator 1. FIG. 5 is a diagram for explaining an assembly process of the vibration generator 1. It is sectional drawing of the vibration generator 11 in 2nd embodiment. FIG. 6 is an enlarged view of a region W2 in the vicinity of the fixing member 23. FIG. 5 is a diagram for explaining an assembly process of the vibration generator 11. FIG. 5 is a diagram for explaining an assembly process of the vibration generator 11. It is a figure which shows the lighting fixture.

<First embodiment>
The vibration generator 1 in the first embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 to 3, the vibration power generator 1 includes a shielding member 2, a pair of fixing members 3, a guide member 10, a coil 14, and a mover 50. The shape of the shielding member 2 is a cylindrical shape. Both ends of the shielding member 2 are opened. The pair of fixing members 3 are respectively provided in the openings at both ends of the shielding member 2. The fixing member 3 covers the opening. The guide member 10, the coil 14, and the mover 50 are accommodated in the shielding member 2. The shielding member 2 covers the guide member 10, the coil 14, and the mover 50 from the outside, and electromagnetically shields the inside and outside of the shielding member 2. The material of the shielding member 2 is a magnetic body. Examples of the material of the shielding member 2 include iron and stainless steel. The shielding member 2 is produced by pressing. Hereinafter, the axial direction of the shielding member 2 is referred to as the axial direction of the vibration generator 1 or simply as the axial direction.

  The guide member 10 is fixed to the shielding member 2 by the fixing member 3. The guide member 10 includes a cylindrical portion 10A, a through hole 10B, a groove portion 10C, and an extending portion 10D. The shape of the cylindrical portion 10A is substantially cylindrical. The axial direction of the cylindrical portion 10 </ b> A faces the same direction as the axial direction of the vibration power generator 1. The axial length of the cylindrical portion 10 </ b> A is shorter than the axial length of the shielding member 2. The outer diameter of the cylindrical portion 10 </ b> A is slightly smaller than the inner diameter of the shielding member 2. The positions of the central axes of the cylindrical portion 10A and the shielding member 2 are the same. When the cylindrical portion 10A and the shielding member 2 are viewed from the axial direction, both are arranged concentrically. A gap is formed between the cylindrical portion 10A and the shielding member 2, and the cylindrical portion 10A and the shielding member 2 do not contact each other.

  A groove portion 10 </ b> C that is recessed toward the central axis is provided at the approximate center in the axial direction of the outer peripheral surface of the cylindrical portion 10 </ b> A. The groove portion 10C circulates along the outer peripheral surface. Coils 14A and 14B (hereinafter collectively referred to as “coil 14”) are wound around the groove 10C. The lengths of the coils 14A and 14B in the axial direction are substantially the same, and are approximately ½ of the length of the groove 10C in the axial direction. The coils 14A and 14B are wound in opposite directions. The coil 14 is wound over the entire area in the axial direction of the groove 10C.

  Extending portions 10D extending in the axial direction are provided on both axial end surfaces of the cylindrical portion 10A. The extending portion 10D has a cylindrical shape. The extending portion 10D has an outer diameter smaller than the outer diameter of the cylindrical portion 10A. The thickness of the peripheral wall of the extending portion 10D is approximately ½ of the thickness of the peripheral wall of the cylindrical portion 10A. The positions of the central axes of the cylindrical portion 10A and the extending portion 10D are the same.

  The guide member 10 includes a through hole 10B extending in the axial direction. The through hole 10B extends in the axial direction along the central axis of the cylindrical portion 10A and the extending portion 10D, and penetrates through the cylindrical portion 10A and the extending portion 10D. The diameter of the through hole 10 </ b> B is approximately ½ of the inner diameter of the shielding member 2.

  As an example of the material of the guide member 10, a known resin material (for example, liquid crystal polymer) can be used. The guide member 10 is manufactured by injection molding.

  The mover 50 includes a permanent magnet 51 and a weight 52. The mover 50 is provided so as to be capable of reciprocating in the axial direction within the through hole 10B. The shape of the permanent magnet 51 is a cylindrical shape. The outer diameter of the permanent magnet 51 is slightly smaller than the diameter of the through hole 10 </ b> B of the guide member 10. The axial direction of the permanent magnet 51 faces the same direction as the axial direction of the vibration power generator 1. The permanent magnet 51 is magnetized in the axial direction. Weights 52 are provided on both sides of the permanent magnet 51 in the axial direction. The weight 52 is provided to increase the weight of the mover 50. As the weight of the mover 50 increases, the mover 50 can easily reciprocate. As a material of the weight 52, brass, lead, stainless steel or the like can be used.

  In addition, the shape of the shielding member 2, the guide member 10, and the permanent magnet 51 can be changed. For example, the shapes of the shielding member 2 and the guide member 10 may be other polygonal cylinder shapes such as an elliptical cylinder shape and a square cylinder shape. The shape of the permanent magnet 51 is not limited to a cylindrical shape, but it is desirable to have the same cross-sectional shape as the through hole 10B.

  As shown in FIG. 2, the fixing member 3 includes a cover part 4, a first fixing part 5, a second fixing part 6, and a buffer member 7. The shape of the cover part 4 is a circular plate shape. The cover 4 covers the opening by bringing the plane into contact with the opening of the shielding member 2. The plane of the cover 4 is orthogonal to the axial direction. The diameter of the cover 4 is larger than the outer diameter of the shielding member 2.

  The first fixing portion 5 extends from the peripheral end portion of the cover portion 4 in a direction orthogonal to the plane of the cover portion 4. The second fixing portion 6 extends from the center side of the cover portion 4 to the direction orthogonal to the plane of the cover portion 4 and on the same side as the first fixing portion 5 from the center side of the portion where the first fixing portion 5 is provided. . The length in the extending direction of the second fixing portion 6 is longer than the length in the extending direction of the first fixing portion 5. The shape of the 1st fixing | fixed part 5 and the 2nd fixing | fixed part 6 is a substantially cylindrical shape. The axial directions of the first fixed portion 5 and the second fixed portion 6 face the same direction as the axial direction of the vibration power generator 1. The positions of the central axes of the first fixed part 5 and the second fixed part 6 are the same. When the first fixed portion 5 and the second fixed portion 6 are viewed from the axial direction, both are arranged concentrically. The buffer member 7 is provided on the center side of the cover portion 4 relative to the portion where the second fixing portion 6 is provided. The buffer member 7 reduces the impact applied to the fixed member 3 when the mover 50 vibrates and collides with the fixed member 3.

  The inner diameter of the first fixing portion 5 is substantially the same as the outer diameter of the shielding member 2. 5 A of inner peripheral surfaces of the 1st fixing | fixed part 5 and 2B of outer peripheral surfaces of the shielding member 2 contact. The inner diameter of the second fixing portion 6 is substantially the same as the outer diameter of the extending portion 10 </ b> D of the guide member 10. 6 A of inner peripheral surfaces of the 2nd fixing | fixed part 6 and the outer peripheral surface 10E of the extension part 10D of the guide member 10 contact. 6 C of front-end | tip surfaces of the 2nd fixing | fixed part 6 and the plane 10F in which the extension part 10D is not provided among the axial direction end surfaces of cylindrical part 10A contact. The distal end surface 10G of the extending portion 10D and the buffer member 7 are in contact with each other. A gap is formed between the outer peripheral surface 6B of the second fixing portion 6 and the inner peripheral surface 2A of the shielding member 2, and the second fixing portion 6 and the shielding member 2 do not contact each other.

  The shape of the fixing member 3 can be changed. The shape of the fixing member 3 viewed from the axial direction may be an ellipse or other polygonal shape such as a quadrangle, but preferably has the same cross-sectional shape as the shielding member 2 and the guide member 10. For example, the shape of the 2nd fixing | fixed part 6 may be cylindrical.

  As shown in FIG. 3, the first fixing portion 5 includes six slits 5C. The slit 5C extends in the axial direction and divides the first fixing portion 5 in the circumferential direction. The respective slits 5C are arranged at equal intervals in the circumferential direction of the first fixing portion 5, and divide the first fixing portion 5 into six equal parts. The number of slits 5C can be changed to other than six. Further, the shape of the slit 5C can be changed. For example, the slit 5 </ b> C may be a groove provided on at least one of the outer peripheral surface and the inner peripheral surface of the first fixing portion 5.

  The power generation operation of the vibration power generator 1 will be described with reference to FIG. The user holds the vibration generator 1 by hand and shakes the vibration generator 1 so as to vibrate in the axial direction. Kinetic energy is applied to the vibration generator 1. Kinetic energy is transmitted to the mover 50 through a frictional force between the through hole 10B of the guide member 10 and the mover 50, a force with which the mover 50 collides with the buffer member 7, and the like. The mover 50 reciprocates in the axial direction in the through hole 10B. The permanent magnet 51 of the mover 50 moves in and out of the space covered with the coil 14 when moving in the axial direction about the center of the guide member 10 in the axial direction. When the mover 50 passes through the space in the coil 14, the magnetic flux generated by the permanent magnet 51 intersects the coil 14. As a result, an induced current is generated in the coil 14. The mover 50 reciprocates in the axial direction, and the permanent magnet 51 repeatedly enters and leaves the space in the coil 14, whereby an alternating current is generated in the coil 14.

  The alternating current generated in the coil 14 is transmitted to a rectification unit (not shown) via a wiring connected to the coil 14. In the rectification unit, full-wave rectification of alternating current is performed. A diode bridge is an example of the rectifying unit. The current rectified by the rectification unit is made constant by a constant voltage circuit (not shown) and then stored in a power storage unit (not shown). An example of the power storage unit is a capacitor. The current stored in the power storage unit is output to the outside via a wiring not shown. The current output to the outside is supplied to the load of the external device. The external device is driven by the supplied current.

  The assembly process of the vibration generator 1 will be described with reference to FIGS. 4 and 5. The shielding member 2, the fixing member 3, the guide member 10, and the mover 50 (see FIG. 1) are prepared. As shown in FIG. 4, the guide member 10 is accommodated in the shielding member 2. In a state where the fixing member 3 is not in contact with the shielding member 2 and the guide member 10, the inner diameter of the first fixing portion 5 is slightly smaller than the outer diameter of the shielding member 2, and the inner diameter of the second fixing portion 6 is the guide. It is slightly smaller than the outer diameter of the extending part 10 </ b> D of the member 10.

  As shown in FIG. 4, the fixing member 3 is brought close to the shielding member 2 in order to fit the fixing member 3 to the end of the shielding member 2. The shielding member 2 enters the central axis side of the first fixing portion 5, and the inner peripheral surface 5 </ b> A of the first fixing portion 5 and the outer peripheral surface 2 </ b> B of the shielding member 2 come into contact with each other. The shielding member 2 pushes the first fixing portion 5 to the side opposite to the central axis (hereinafter referred to as “outside”). Since the first fixing portion 5 is provided with the slit 5C (see FIG. 3), the first fixing portion 5 is elastically deformed outward. As shown in FIG. 5, the first fixing portion 5 pushes the shielding member 2 toward the central axis side (hereinafter referred to as “inside”) by a repulsive force against elastic deformation. The inner peripheral surface 5A of the first fixing portion 5 and the outer peripheral surface 2B of the shielding member 2 are in close contact with each other, and the shielding member 2 is fixed by the fixing member 3.

  Since the shielding member 2 is manufactured by pressing, there is a high possibility that individual differences in diameter will be particularly large. However, as described above, in the fixing member 3, the first fixing portion 5 is elastically deformed outward and is in close contact with the shielding member 2. Therefore, even when the individual difference in the diameter of the shielding member 2 is large, the position of the guide member 10 with respect to the shielding member 2 is always appropriately fixed.

  As with the shielding member 2, the fixing member 3 is brought close to the guide member 10. The extending portion 10D of the guide member 10 enters the inside of the second fixing portion 6, and the inner peripheral surface 6A of the second fixing portion 6 and the outer peripheral surface 10E of the extending portion 10D are in contact with each other. The extending portion 10D pushes the second fixing portion 6 outward. As shown in FIG. 5, the second fixing portion 6 pushes the guide member 10 inward by a repulsive force against elastic deformation. 6 A of inner peripheral surfaces of the 2nd fixing | fixed part 6 and 10E of outer peripheral surfaces of the extension part 10D are closely_contact | adhered, and the position of the guide member 10 with respect to the fixing member 3 is fixed. As described above, since the shielding member 2 is fixed by the fixing member 3, as a result, the position of the guide member 10 with respect to the shielding member 2 is fixed. The fixing member 3 is pressed against the guide member 10 until the distal end surface 6C of the second fixing portion 6 and the flat surface 10F of the guide member 10 come into contact with each other.

  In addition, since the guide member 10 is produced by injection molding, the individual difference of a diameter is small compared with the shielding member 2. FIG. Therefore, the degree of elastic deformation to the outside of the second fixing portion 6 is smaller than the degree of elastic deformation to the outside of the first fixing portion 5. For this reason, even when the fixing member 3 is fitted to the shielding member 2 and the guide member 10, there is a state in which a gap is formed between the inner peripheral surface 2 </ b> A of the shielding member 2 and the outer peripheral surface 6 </ b> B of the second fixing portion 6. Maintained.

  After the fixing member 3 is fitted to one end of the shielding member 2 and the guide member 10 by the above-described method, the mover 50 is inserted into the guide member 10 from the other end side of the guide member 10. Next, another fixing member 3 is fitted into the other end of the shielding member 2 and the guide member 10 in the same manner. Accordingly, the pair of fixing members 3 sandwich the guide member 10 from both sides in the axial direction. Specifically, each buffer member 7 of the pair of fixing members 3 contacts the tip surface 10G of the extending portion 10D, and the tip surfaces 6C of the second fixing portions 6 of the pair of fixing members 3 are cylindrical. By making contact with the flat surface 10F of the portion 10A, the pair of fixing members 3 sandwich the guide member 10 from both sides in the axial direction.

  When the first fixing portion 5 pushes the shielding member 2 inward, the shielding member 2 is fixed by the fixing member 3. Further, the second fixing portion 6 pushes the guide member 10 inward, and the pair of fixing members 3 sandwich and support the guide member 10 from both sides in the axial direction, whereby the position of the guide member 10 with respect to the shielding member 2 is fixed. Is done. As a result, the guide member 10 is fixed in the shielding member 2 with a gap formed between the guiding member 10 and the shielding member 2.

  In addition, the assembly process of the vibration generator 1 mentioned above can be changed. For example, after the fixing member 3 is first fitted to one end of the guide member 10, the shielding member 2 may be fitted to the fixing member 3, or the fixing member 3 is simultaneously attached to the shielding member 2 and the guide member 10. It may be fitted.

  As described above, the fixing member 3 is configured such that the inner peripheral surface 5A of the first fixing portion 5 and the outer peripheral surface 2B of the shielding member 2 are in contact with each other, and the first fixing portion 5 is elastically deformed outward. To fix. Moreover, the fixing member 3 fixes the guide member 10 when the inner peripheral surface 6A of the second fixing portion 6 and the outer peripheral surface 10E of the extending portion 10D come into contact with each other and the second fixing portion 6 is elastically deformed outward. Thus, the guide member 10 is fixed to the shielding member 2 via the fixing member 3. Therefore, the vibration generator 1 can stably fix the guide member 10 to the shielding member 2 even when the individual difference in the diameter of the shielding member 2 is large. The fixing member 3 can fix the guide member 10 to the shielding member 2 in a state where the guide member 10 does not contact the shielding member 2. Therefore, the vibration generator 1 is shielded so that the shielding member 2 and the cylindrical portion 10A of the guide member 10 overlap each other concentrically when viewed from the axial direction even when the individual difference in the diameter of the shielding member 2 is large. The guide member 10 can be stably fixed in the member 2. In this case, since the distance between the shielding member 2 and the guide member 10 is uniform, the shielding member 2 is partially magnetized by the permanent magnet 51 when the mover 50 reciprocates through the guide member 10. Can be suppressed. Therefore, the vibration generator 1 can stably and continuously vibrate the mover 50 in the guide member 10.

  For example, a case where the shielding member 2 having an inner diameter of 16 mm is produced by press working will be described as an example. In this case, generally, the inner diameter may vary within a range of about 0.3 mm due to individual differences. Therefore, in the vibration power generator 1, the guide member 10 is manufactured so that the outer diameter of the cylindrical portion 10A of the guide member 10 is 15 mm. In this case, an error of 0.3 mm in the inner diameter of the shielding member 2 can be absorbed by a difference in diameter of 1 mm between the shielding member 2 and the guide member 10. Therefore, even if the internal diameter of the shielding member 2 varies due to individual differences, the vibration generator 1 can fix both the cylindrical portion 10A and the shielding member 2 so that they do not contact each other.

  In the vibration generator 1, the inner diameter of the shielding member 2 is adjusted to be larger than the outer diameter of the cylindrical portion 10 </ b> A of the guide member 10. For this reason, when the guide member 10 is inserted into the shielding member 2 in the assembly process, the shielding member 2 and the cylindrical portion 10A of the guide member 10 come into contact with each other, and a part of the cylindrical portion 10A is scraped off by the shielding member 2. There is nothing. Therefore, it can suppress that the scraped piece remains in the shielding member 2 like the conventional vibration generator.

  Moreover, the 1st fixing | fixed part 5 becomes easy to elastically deform by providing the slit 5C. Therefore, the vibration generator 1 can appropriately fix the guide member 10 to the shielding member 2. Further, since the mover 50 is provided with the weight 52, it becomes easy to move, so that the power generation efficiency of the vibration power generator 1 is improved.

<Second embodiment>
The vibration generator 11 in the second embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 6 to 8, the vibration generator 11 is different from the vibration generator 1 (see FIGS. 1 to 3) in that a pair of fixing members 3 (see FIGS. 1 to 3) is replaced with a pair of fixing members 3 (see FIGS. 1 to 3). The fixing member 23 is used, and the extending portion 12D is provided in the cylindrical portion 10A of the guide member 10 instead of the extending portion 10D (see FIGS. 1 to 3). Other configurations are the same as those of the vibration generator 1. Therefore, the description of the shielding member 2, the guide member 10 excluding the extending portion 12D, the coil 14, and the mover 50 is omitted.

  As shown in FIG. 6, extending portions 12 </ b> D that protrude in the axial direction and extend in the axial direction are provided on both end surfaces in the axial direction of the cylindrical portion 10 </ b> A of the guide member 10. The extension portion 12D has a cylindrical shape. The positions of the central axes of the cylindrical portion 10A and the extending portion 12D are the same. As shown in FIG. 7, a step is formed on the outer peripheral surface 12E of the extending portion 12D.

  As shown in FIG. 7, the fixing member 23 includes a cover part 24, a first fixing part 25, and a second fixing part 26. Since the shape of the cover part 24 is the same as the cover part 4 in 1st embodiment, description is abbreviate | omitted. The first fixing portion 25 extends in a direction orthogonal to the plane of the cover portion 24 from slightly inside the peripheral end portion of the cover portion 24. The second fixing part 26 extends from the center side of the cover part 24 in the direction orthogonal to the plane of the cover part 24 and on the same side as the first fixing part 25 from the center side. . The length in the extending direction of the first fixing portion 25 is substantially the same as the length in the extending direction of the second fixing portion 26. The shapes of the first fixing part 25 and the second fixing part 26 are substantially cylindrical. The axial directions of the first fixed portion 25 and the second fixed portion 26 face the same direction as the axial direction of the vibration generator 11. The positions of the central axes of the first fixed portion 25 and the second fixed portion 26 are the same. When the first fixing portion 25 and the second fixing portion 26 are viewed from the axial direction, both are arranged concentrically. A step is formed on the inner peripheral surface 26 </ b> A of the second fixing portion 26. A gap having a slight width is formed between the inner peripheral surface 25 </ b> A of the first fixed portion 25 and the outer peripheral surface 26 </ b> B of the second fixed portion 26.

  The outer diameter of the first fixing portion 25 is substantially the same as the inner diameter of the shielding member 2. The outer peripheral surface 25B of the first fixed portion 5 and the inner peripheral surface 2A of the shielding member 2 are in contact with each other. 26 A of inner peripheral surfaces of the 2nd fixing | fixed part 26 and the outer peripheral surface 12E of the extension part 12D of the guide member 10 contact. The distal end surface 26C of the second fixing portion 26 is in contact with the flat surface 10F where the extending portion 12D is not provided on the axial end surface of the cylindrical portion 10A. The distal end surface 12G of the extending portion 12D and the buffer member 7 are in contact with each other. In addition, it cannot be overemphasized that the shape of the fixing member 23 can be changed like the case of 1st embodiment. Moreover, the 1st fixing | fixed part 25 may be provided with the some slit similarly to 1st embodiment.

  The assembly process of the vibration generator 11 will be described with reference to FIGS. In a state where the fixing member 23 is not in contact with the shielding member 2 and the guide member 10, the outer diameter of the first fixing portion 25 is slightly larger than the inner diameter of the shielding member 2, and the inner diameter of the second fixing portion 26 is It is slightly smaller than the outer diameter of the extending portion 12D of the member 10.

  As shown in FIG. 8, the fixing member 23 is brought close to the shielding member 2 in order to fit the fixing member 23 to the end portion of the shielding member 2. The shielding member 2 covers the outside of the first fixing portion 25, and the outer peripheral surface 25B of the first fixing portion 25 and the inner peripheral surface 2A of the shielding member 2 are in contact with each other. The first fixing portion 25 is elastically deformed inward. As shown in FIG. 9, the 1st fixing | fixed part 25 pushes the shielding member 2 outside by the repulsive force with respect to elastic deformation. The outer peripheral surface 25 </ b> B of the first fixing portion 25 and the inner peripheral surface 2 </ b> A of the shielding member 2 are in close contact, and the shielding member 2 is fixed by the fixing member 23. Since the first fixing portion 25 is elastically deformed inward, the shielding member 2 is always appropriately fixed by the fixing member 23 even when the individual difference in the diameter of the shielding member 2 is large.

  As with the shielding member 2, the fixing member 23 is brought close to the guide member 10. The extended portion 12D of the guide member 10 enters the inside of the second fixed portion 26, and the inner peripheral surface 26A of the second fixed portion 26 and the outer peripheral surface 12E of the extended portion 12D are in contact with each other. The extending portion 12D pushes the second fixing portion 26 outward. As shown in FIG. 9, the second fixing portion 26 pushes the guide member 10 inward by a repulsive force against elastic deformation. The inner peripheral surface 26A of the second fixing portion 26 and the outer peripheral surface 12E of the extending portion 12D are in close contact with each other, and the position of the guide member 10 with respect to the fixing member 23 is fixed. The fixing member 23 is pressed against the guide member 10 until the distal end surface 26C of the second fixing portion 26 comes into contact with the flat surface 10F of the cylindrical portion 10A. The guide member 10 has a smaller individual difference in diameter than the shielding member 2. Therefore, the degree of elastic deformation to the outside of the second fixing part 26 is smaller than the degree of elastic deformation to the inside of the first fixing part 25. For this reason, even when the fixing member 23 is fitted to the shielding member 2 and the guide member 10, a state in which a gap is formed between the first fixing portion 25 and the second fixing portion 26 is maintained.

  After the fixing member 23 is fitted to one end of the shielding member 2 and the guide member 10 by the above-described method, the mover 50 is inserted into the guide member 10 from the other end side of the guide member 10. Next, another fixing member 23 is fitted into the other end of the shielding member 2 and the guide member 10 in the same manner. Thus, the pair of fixing members 23 sandwich the shielding member 2 and the guide member 10 from both sides in the axial direction. Specifically, each buffer member 7 of the pair of fixing members 23 contacts the tip surface 12G of the extending portion 12D, and the tip surfaces 26C of the second fixing portions 26 of the pair of fixing members 23 are cylindrical. By making contact with the flat surface 10F of the portion 10A, the pair of fixing members 23 sandwich the guide member 10 from both sides in the axial direction.

  The position of the guide member 10 with respect to the shielding member 2 is fixed by the second fixing portion 26 pushing the guide member 10 inward and the pair of fixing members 23 sandwiching and supporting the guide member 10 from both sides in the axial direction. . As a result, the guide member 10 is fixed in the shielding member 2 with a gap formed between the guiding member 10 and the shielding member 2. In addition, it cannot be overemphasized that the assembly process of the vibration generator 11 can be changed like the case of 1st embodiment.

  As described above, in the fixing member 23, the outer peripheral surface 25 </ b> B of the first fixing portion 25 and the inner peripheral surface 2 </ b> A of the shielding member 2 are in contact with each other, and the first fixing portion 25 is elastically deformed inward, thereby To fix. The fixing member 23 fixes the guide member 10 by the inner peripheral surface 26A of the second fixing portion 26 and the outer peripheral surface 12E of the extending portion 12D being in contact with each other, and the second fixing portion 26 elastically deforming outward. Thus, the guide member 10 is fixed to the shielding member 2 via the fixing member 3. Therefore, as in the case of the first embodiment, the vibration generator 11 can stably fix the guide member 10 to the shielding member 2 even when the individual difference in the diameter of the shielding member 2 is large. Further, since the fixing member 3 can fix the guide member 10 to the shielding member 2 in a state where the guide member 10 does not contact the shielding member 2, the vibration generator 11 is a case where the individual difference in the diameter of the shielding member 2 is large. In addition, the guide member 10 can be stably fixed in the shield member 2 so that the shield member 2 and the cylindrical portion 10A of the guide member 10 overlap each other when viewed in the axial direction.

<Application example>
FIG. 10 shows a luminaire 31 using the vibration generator 1 or the vibration generator 11. An example of the lighting fixture 31 is a flashlight. The lighting fixture 31 includes a light emitting unit 32, a diode bridge 33, a constant voltage circuit 34, and a capacitor 35. The diode bridge 33 is connected to the coil 14. The diode bridge 33 performs full-wave rectification of the alternating current generated in the coil 14. The constant voltage circuit 34 is connected to the output terminal of the current rectified by the diode bridge 33. The constant voltage circuit 34 converts the current rectified by the diode bridge 33 to a constant voltage. The capacitor 35 is connected to the output terminal of the constant voltage circuit 34. The capacitor 35 stores the current that is made constant by the constant voltage circuit 34. The light emitting unit 32 is connected to the capacitor 35. The light emitting unit 32 includes an LED. The light emitting unit 32 causes the LED to emit light by passing the stored current through the LED.

  The user holds the lighting fixture 31 by hand and shakes the vibration power generator 1 so as to vibrate in the axial direction. The mover 50 of the vibration generator 1 reciprocates in the axial direction, and an alternating current is generated in the coil 14. The alternating current generated in the coil 14 is transmitted to the diode bridge 33 and full-wave rectified. The current rectified by the diode bridge 33 is made constant by the constant voltage circuit 34 and then stored in the capacitor 35. The current stored in the capacitor 35 flows to the light emitting unit 32 when a switch (not shown) is turned on, and the LED emits light.

  As described above, the luminaire 31 includes the vibration power generator 1 or the vibration power generator 11, and the LED of the light emitting unit 32 can emit light by vibrating. Since the vibration generator 1 or 11 can stably and continuously vibrate the permanent magnet 51, the lighting fixture 31 can cause the LED of the light emitting unit 32 to emit light stably.

  In addition, this invention is not limited to the said 1st embodiment and 2nd embodiment, A various change is possible. In the first embodiment and the second embodiment, the fixing members 3 and 23 may not include the second fixing portions 6 and 26. Even in this case, since the fixing members 3 and 23 support the guide member 10 from both sides in the axial direction, the guide member 10 is stably fixed to the shielding member 2. In said 1st embodiment and 2nd embodiment, the 1st fixing | fixed part 5 and 25 may have a structure which contacts both the outer peripheral surface of the shielding member 2, and an internal peripheral surface. That is, the fixing members 3 and 23 may be fixed to the shielding member 2 by the first fixing portions 5 and 25 sandwiching the shielding member 2 from both the inside and the outside.

  An elastic rubber (synthetic rubber) such as a silicone resin or NBR (Nitrile butadiene rubber) may be used as the material of the fixing member 3. In this case, first The fixing unit 5 may be configured without the slit 5C.

  The lighting fixture 31 shown in the above application example is an application example of the vibration generators 1 and 11. Therefore, the vibration generators 1 and 11 may be used by being mounted on other devices.

DESCRIPTION OF SYMBOLS 1, 11 Vibration generator 2 Shield member 2A Outer peripheral surface 2B Inner peripheral surface 2C End surface 3, 23 Fixed member 4, 24 Cover part 5, 25 First fixed part 6, 26 Second fixed part 5C Slit 10 Guide member 14 Coil 31 Illuminator 32 Light emitting unit 50 Movable element 51 Permanent magnet 52 Weight 32 Light emitting unit

Claims (5)

A guide member that is a tubular member;
A mover provided inside the guide member so as to be movable in the axial direction and having a permanent magnet;
A coil wound around the guide member;
A cylindrical member having an inner diameter larger than the outer diameter of the guide member, covering the guide member from the outside in a state where the central axis is substantially the same as the central axis of the guide member, and electromagnetically shielding the inside A shielding member that,
A vibration generator comprising a pair of fixing members that cover the openings at both ends of the shielding member and sandwich the guide member from both sides in the axial direction to fix the guide member to the shielding member,
The fixing member is
A cover that covers the opening at the end of the shielding member;
The shielding member is fixed to the fixing member by extending in the axial direction from the cover, contacting at least one of the outer peripheral surface and the inner peripheral surface of the shielding member, and elastically deforming in a direction intersecting the axial direction. A first fixing part,
The vibration generator, wherein the guide member is fixed in a state where the guide member does not contact the shielding member. The fixing member is
A second fixing portion is provided that extends in the axial direction from the cover, contacts the outer peripheral surface of the guide member, and elastically deforms in a direction intersecting the axial direction to fix the guide member. The vibration generator according to claim 1. The first fixing part is
The vibration generator according to claim 1, further comprising a slit extending in the axial direction. The mover is
The vibration generator according to any one of claims 1 to 3, wherein weights are provided at both ends in the axial direction. The vibration generator according to any one of claims 1 to 4,
A lighting apparatus comprising: a light emitting unit that emits light based on a current induced in the coil as the movable element moves in the guide member.

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