CN103384110A - Electromagnetic type minitype vibration generator and equipment including same - Google Patents
Electromagnetic type minitype vibration generator and equipment including same Download PDFInfo
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- CN103384110A CN103384110A CN2013102720394A CN201310272039A CN103384110A CN 103384110 A CN103384110 A CN 103384110A CN 2013102720394 A CN2013102720394 A CN 2013102720394A CN 201310272039 A CN201310272039 A CN 201310272039A CN 103384110 A CN103384110 A CN 103384110A
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Abstract
The invention provides an electromagnetic type minitype vibration generator and equipment including the same. The electromagnetic type minitype vibration generator comprises a shell body, a magnetic circuit part and a coil attached and connected to the shell body, wherein the magnetic circuit part is elastically attached and connected to the shell body at the position of one component of the magnetic circuit part to generate a magnetic field and limit a magnetic gap, and the coil is at least partially located in the magnetic gap. The magnetic part can comprise a magnetic bowl and central magnetic steel stacked and fixed on the magnetic bowl in the center, the magnetic bowl covers the bottom of the central magnetic steel and is provided with a side face protruding part, the side face protruding part is arranged on the bottom of the magnetic bowl in a stretching mode, is spaced with the side face of the central magnetic steel and surrounds the side face of the central magnetic steel, and a magnetic gap is limited between the side face protruding part and the side face of the central magnetic steel; or the magnetic part can comprise a magnetic bowl, central magnetic steel stacked and fixed on the magnetic bowl in the center and edge magnetic steel, wherein the edge magnetic steel is arranged concentrically with the central magnetic steel, at least partially surrounds the central magnetic steel and is stacked and fixed on the magnetic bowl, the magnetic bowl covers the bottom of the central magnetic steel and the bottom of the edge magnetic steel, and a magnetic gap is limited between the central magnetic steel and the edge magnetic steel.
Description
Technical field
The present invention relates in general to miniature vibration electric generator, in particular to the electromagnetic miniature vibrating electricity generator.
Background technology
Vibrating electricity generator is a kind of equipment that vibration mechanical energy is changed into electric energy.The most traditional vibrating electricity generator is the magnet that uses a suspension, and coil is placed in magnetic field, utilizes and vibrates the relative motion that causes between coil and magnet, thereby produce electromagnetic induction, generation current.The high-rating generator of this and big power station is similar.
In recent years, along with the particularly development of micro-processing technology of lifting of material property and processing technology, people were devoted to the exploitation of miniature vibration electric generator more.The electromagnetic miniature vibrating electricity generator is a kind of common miniature vibration electric generator, has been applied in the application such as wireless senser, Electronic Control, vibration monitoring.The electromagnetic miniature vibrating electricity generator volume of prior art is larger, is not suitable for being applied in narrow space.Utilize the electromagnetic miniature vibrating electricity generator of prior art, be difficult to realize having the miniature vibration electric generator of larger output in less volume.
Fig. 5 has schematically shown a kind of electromagnetic miniature vibrating electricity generator of prior art with the form of sectional view.It is substantially circular that this electromagnetic miniature vibrating electricity generator totally is, and comprises housing, upper spring, magnet, coil, the lower spring arranged as illustrated in fig. 5.Upper spring, magnet, coil and lower spring are placed in housing.Upper and lower spring is connected to housing, and coil is positioned at magnet central authorities, around the central shaft that runs through magnet central authorities and arrange symmetrically about this central shaft.When this electromagnetic miniature vibrating electricity generator vibrates on the direction of vibration shown in Fig. 5, cause coil with respect to the motion of magnet, thereby produce electromagnetic induction, generation current.
For the electromagnetic miniature vibrating electricity generator of type shown in Figure 5, a kind of obtainable diameter on the market is 55mm, highly have the nominal power of 20mW for the product of 55mm.
Summary of the invention
The present invention aims to provide a kind of electromagnetic miniature vibrating electricity generator of novelty, to overcome the problem of prior art mentioned above.
According to an aspect of the present invention, a kind of electromagnetic miniature vibrating electricity generator is provided, it is characterized in that, comprise housing, magnetic circuit part and be attached to the coil of housing, magnetic circuit part flexibly is attached to housing at one parts places, magnetic circuit part produces magnetic field and limits magnetic gap, and coil is arranged in magnetic gap at least in part.
In a preferred embodiment, magnetic circuit part comprises the magnetic bowl, stacks and be fixed on with being centered the center magnet steel on the magnetic bowl, the magnetic bowl covers the bottom of center magnet steel, and have from its bottom extend, spaced apart and surround the lateral projections section of the side of center magnet steel with the side of center magnet steel, limit magnetic gap between the side of lateral projections section and center magnet steel.Preferably, magnetic circuit part also comprises the central guiding magnetic sheet, and the central guiding magnetic sheet is stacked and be fixed on the top of center magnet steel, makes the central guiding magnetic sheet cover the top of center magnet steel.Preferably, top periphery one distance of the periphery overcenter magnet steel of central guiding magnetic sheet.Preferably, described parts of magnetic circuit part comprise the magnetic bowl, and the magnetic bowl flexibly is attached to the sidepiece of housing by spring leaf at its sidepiece.Preferably, described parts of magnetic circuit part comprise the magnetic bowl, and the magnetic bowl flexibly is attached to the bottom of housing in its bottom by helical spring.
In a further preferred embodiment, magnetic circuit part comprises the magnetic bowl, stack and be fixed on with being centered center magnet steel on the magnetic bowl, with center magnet steel arranged concentric and surround at least in part the center magnet steel and stacked and be fixed on edge magnet steel on the magnetic bowl, the magnetic bowl covers the bottom of center magnet steel and the bottom of edge magnet steel, limits magnetic gap between center magnet steel and edge magnet steel.Preferably, magnetic circuit part also comprises at least one in central guiding magnetic sheet and edge magnetic conductive board, the central guiding magnetic sheet is stacked and is fixed on the top of center magnet steel, make the central guiding magnetic sheet cover the top of center magnet steel, the edge magnetic conductive board is stacked and is fixed on the top of edge magnet steel, makes the edge magnetic conductive board cover the top of edge magnet steel.Preferably, top periphery one distance of the periphery overcenter magnet steel of central guiding magnetic sheet, and/or top periphery one distance of the periphery excess edge magnet steel of edge magnetic conductive board.Preferably, described parts of magnetic circuit part comprise the magnetic bowl, and the magnetic bowl flexibly is attached to the sidepiece of housing by spring leaf at its sidepiece.Preferably, described parts of magnetic circuit part comprise the magnetic bowl, and the magnetic bowl flexibly is attached to the bottom of housing in its bottom by helical spring.Preferably, stack on its of magnetic bowl and its of the marginal portion of built-in edge magnet steel and magnetic bowl on stack and the core of fixed center magnet steel between form a step, make and form a breach under the marginal portion of magnetic bowl, the magnetic bowl flexibly is attached to the sidepiece of housing by spring leaf under the marginal portion at its sidepiece, spring leaf is accommodated in breach.Preferably, in central guiding magnetic sheet and edge magnetic conductive board described at least one comprise the edge magnetic conductive board, described parts of magnetic circuit part comprise the edge magnetic conductive board, the edge magnetic conductive board flexibly is attached to the sidepiece of housing by spring leaf at its sidepiece.Preferably, form a step between the remainder of the inner part of the close center of edge magnetic conductive board magnet steel and edge magnetic conductive board, form thus a breach on the described remainder of edge magnetic conductive board, the edge magnetic conductive board flexibly is attached to the sidepiece of housing by spring leaf on described remainder at its sidepiece, spring leaf is accommodated in breach.
Preferably, coil is attached to housing regularly, preferably is attached to regularly the top of housing.
Preferably, spring leaf has interior ring, outer shroud and a plurality of cantilever, and each cantilever one end in described a plurality of cantilevers is connected to interior ring, and the other end is connected to outer shroud, and interior ring is attached to described parts, and outer shroud is attached to housing.Preferably, spring leaf is square, and described a plurality of cantilevers comprise at least one pair of cantilever, and every pair of cantilever in described at least one pair of cantilever is symmetrical.Preferably, spring leaf is rounded, and described a plurality of cantilevers are evenly distributed between interior ring and outer shroud.Preferably, at least two in described a plurality of cantilever have identical or different size and/or material.
Preferably, the magnetic bowl is attached to respectively the sidepiece of housing at its sidepiece at a plurality of diverse locations by a plurality of spring leafs.Preferably, at least two in described a plurality of spring leaf have identical or different resonance frequency.
According to a further aspect in the invention, provide vibrative equipment in a kind of use, comprise electromagnetic miniature vibrating electricity generator described according to described one side.
Utilize technical scheme of the present invention, the magnetic line of force in magnetic field more concentrates on the coil position, and when coil was made cutting magnetic line movement in magnetic field, the power that acts on coil was larger thus, thereby power output is larger.
Miniature vibration electric generator compact conformation of the present invention can provide relatively high output in small volume.
Description of drawings
By hereinafter by reference to the accompanying drawings detailed description, will understand better the present invention.In the accompanying drawings:
Fig. 1 schematically shows a preferred embodiment of electromagnetic miniature vibrating electricity generator of the present invention with the form of sectional view;
Fig. 2 schematically shows another preferred embodiment of electromagnetic miniature vibrating electricity generator of the present invention with the form of sectional view;
Fig. 3 has schematically shown a spring leaf that is applicable to the embodiment of Fig. 1 and 2;
Fig. 4 has schematically shown another and has been applicable to the spring leaf of the embodiment of Fig. 1 and 2;
Fig. 5 has schematically shown a kind of electromagnetic miniature vibrating electricity generator of prior art with the form of sectional view.
Should be understood that these accompanying drawings only presented for purpose of illustration with the explanation purpose, may not draw in proportion.In addition, in different accompanying drawings, same or analogous reference number refers to same or analogous parts.
Embodiment
Electromagnetic miniature vibrating electricity generator of the present invention can comprise housing, magnetic circuit part and be attached to the coil of housing, and magnetic circuit part flexibly is attached to housing at one parts places, and magnetic circuit part produces magnetic field and also limits magnetic gap, and coil is arranged in magnetic gap at least in part.
In one embodiment of the invention, the electromagnetic miniature vibrating electricity generator comprises housing, flexibly is attached to the magnetic bowl of housing, stacks and be fixed on with being centered the center magnet steel on the magnetic bowl and is attached to the coil of housing.The magnetic bowl covers the bottom of center magnet steel, and have from its bottom extend, spaced apart and surround the lateral projections section of the side of center magnet steel with the side of center magnet steel, limit magnetic gap thus between the side of the lateral projections section of magnetic bowl and center magnet steel.Coil is arranged in magnetic gap at least in part.
Housing forms a cavity.Magnetic bowl, center magnet steel, coil are placed in housing.Because the magnetic bowl flexibly is attached to housing, when the electromagnetic miniature vibrating electricity generator for example moves up and down, cause the magnetic bowl and thereby cause center magnet steel on it with respect to coil movement, result is equivalent to coil is made cutting magnetic line in magnetic field motion, thereby produces induced current in coil.Like this, can produce induced current output.
Fig. 1 schematically shows a preferred embodiment of electromagnetic miniature vibrating electricity generator of the present invention with the form of sectional view.
In this embodiment that illustrates, housing is combined together to form by upper cover 12, support 13 and bottom 15.In other embodiments, housing can form in a different manner.
In this embodiment that illustrates, magnetic bowl 17 is attached to flexibly by spring leaf 14 at its sidepiece that the sidepiece of housing---it is corresponding to support 13.In other embodiments, magnetic bowl 17 can flexibly be attached to the different parts of housing, for example can flexibly be attached to by helical spring the bottom of housing.
Center magnet steel 16 stacks and is fixed on magnetic bowl 16 with being centered.Magnetic bowl 17 have from its bottom extend, spaced apart and surround the lateral projections section of the side of center magnet steel with the side of center magnet steel.Like this, form magnetic gap between the side of the lateral projections section of magnetic bowl and center magnet steel 16.
In this embodiment that illustrates, coil 10 is attached to the upper cover 12 of housing, is arranged at least in part magnetic gap.In other embodiments, coil 10 can be attached to the different parts of housing, for example can be attached to the sidepiece of housing.Preferably, coil 10 is attached to housing regularly.
In this embodiment that illustrates, miniature vibration electric generator also comprises central guiding magnetic sheet 11, and the central guiding magnetic sheet is stacked and be fixed on center magnet steel 16 tops, makes the central guiding magnetic sheet cover the top of center magnet steel.Preferably, top periphery one distance of the periphery overcenter magnet steel 16 of central guiding magnetic sheet 11, for example 0.2-0.5mm.
Magnetic bowl 17 in Fig. 1, center magnet steel 16, central guiding magnetic sheet 11, coil 10, upper cover 12, bottom 15, support 13 can have circle, track type (being similar to ellipse) or square shape, or have rounded, track type (being similar to ellipse) or square cross section.The profile of spring leaf 14 is consistent with the profile of vibrating motor, can be circular, track type (being similar to ellipse) or square.
Upper cover 12 and bottom 15 can be made by organic plastics, stainless steel, copper or its combination, have the shape consistent with the shape of cross section of support 13.
Support 13 can be made of plastics, and is combined together to form housing with upper cover 12 and bottom 15, supports and protect the parts that are placed in this housing.
Coil 10 can form by the conventional method coiling with the wire of being made by copper, copper alloy, aluminium, copper cover aluminum etc.
Center magnet steel 16 can be made by ferrite, neodymium-iron-boron magnetic material etc., is used for providing magnetic field.
Central guiding magnetic sheet 11 can be made by mild steel, and its effect is to collect the magnetic line of force, makes Distribution of Magnetic Field more concentrate on coil region.Can exceed by the periphery that makes central guiding magnetic sheet 11 top periphery one distance of its center magnet steel 16 that covers, make central guiding magnetic sheet 11 bring into play better its effect.For example, in the situation that central guiding magnetic sheet 11 and center magnet steel 16 are circle, can make the diameter of central guiding magnetic sheet 11 than the slightly larger in diameter of center magnet steel 16, for example large 0.4-1.0mm---like this, but the top periphery 0.2-0.5mm of the periphery overcenter magnet steel 16 of central guiding magnetic sheet 11.
Magnetic bowl 17 can be made by mild steel.Magnetic bowl 17 also plays and collects the magnetic line of force and make Distribution of Magnetic Field more concentrate on the effect of coil region.
Spring leaf 14 can be made by SUS301 stainless steel, manganese bronze, phosphor bronze, cast iron, carbon steel elastomeric material, can be attached between magnetic bowl 17 sidepieces and support 13 in side bottom, middle part, side, side top or other position level of magnetic bowl.
Magnetic bowl 17 in Fig. 1, center magnet steel 16 and optional central guiding magnetic sheet 11 form magnetic circuit part.
The below provides an exemplary embodiment that is applicable to spring leaf of the present invention.
Fig. 3 shows a spring leaf that totally is square.Spring leaf is comprised of interior ring 14a, outer shroud 14b and two couples of cantilever 14c1,14c2,14c3,14c4.Each homogeneous end in these two couples of cantilever 14c1,14c2,14c3,14c4 is connected to interior ring 14a, the other end is connected to outer shroud 14b, and every pair of cantilever in these two couples of cantilever 14c1,14c2,14c3,14c4 is symmetrical about the center of spring leaf, be that cantilever 14c1,14c2 are symmetrical, cantilever 14c3,14c4 are symmetrical.
In addition, can see, cantilever 14c1 and 14c3 are one group of cantilever, and cantilever 14c2 and 14c4 are another group cantilever.These two groups of cantilevers are arranged between interior ring 14a and outer shroud 14b equably.
Although in the embodiment show in figure 3, show two pairs of cantilevers, as the case may be, spring leaf only can have a pair of cantilever or have more than two pairs of cantilevers, wherein each cantilever homogeneous end is connected to interior ring 14a, and the other end is connected to outer shroud 14b, and every pair of cantilever is symmetrical.
The resonance frequency of this spring leaf shown in Fig. 3 should be consistent with the operating frequency of the vibrating electricity generator that uses it.The resonance frequency of this spring leaf and its coefficient of elasticity are closely related, can change by the size that changes its material and/or its cantilever its resonance frequency.For example, can make spring leaf by using the higher material of modulus of elasticity such as cast iron or carbon steel, increase the width of its part or all of cantilever and/or reduce the length of its part or all of cantilever, realize the resonance frequency that spring leaf increases; Can make spring leaf by using the lower material of modulus of elasticity such as manganese bronze, phosphor bronze, reduce the width of its part or all of cantilever and/or increase the length of its part or all of cantilever, realize the resonance frequency that spring leaf reduces.
Fig. 4 shows another exemplary embodiment that is applicable to spring leaf of the present invention.
As shown in Figure 4, spring leaf is totally rounded, is comprised of interior ring 14a ', outer shroud 14b ' and three cantilever 14c1 ', 14c2 ', 14c3 '.Each homogeneous end in these three cantilevers is connected to interior ring 14a ', and the other end is connected to outer shroud 14b '.These three cantilevers are arranged between interior ring 14a ' and outer shroud 14b ' equably.
Although in the embodiment show in figure 4, show three cantilevers, as the case may be, spring leaf can have two cantilevers or more than three cantilevers, and wherein each cantilever homogeneous end is connected to interior ring 14a ', and the other end is connected to outer shroud 14b '.
The resonance frequency of this spring leaf shown in Fig. 4 should be consistent with the operating frequency of the vibrating electricity generator that uses it.The resonance frequency of this spring leaf and its coefficient of elasticity are closely related, can change by the size that changes its material and/or its cantilever its resonance frequency.For example, can make spring leaf by using the higher material of modulus of elasticity such as cast iron or carbon steel, increase the width of its part or all of cantilever and/or reduce the length of its part or all of cantilever, realize the resonance frequency that spring leaf increases; Can make spring leaf by using the lower material of modulus of elasticity such as manganese bronze, phosphor bronze, reduce the width of its part or all of cantilever and/or increase the length of its part or all of cantilever, realize the resonance frequency that spring leaf reduces.
Spring leaf shown in Fig. 3 and 4 is when the embodiment that is used for shown in Fig. 1, can be attached at as follows between magnetic bowl 17 and housing: the interior ring of spring leaf is attached to the sidepiece of magnetic bowl 17, the outer shroud of spring leaf is attached to the inwall of support 13, makes the spring leaf level be attached between the sidepiece and support 13 of magnetic bowl 17.
Although in embodiment shown in Figure 1, show single spring leaf 14.But as the case may be, can use two or more spring leafs.For example, for the embodiment shown in Fig. 1, if the height of miniature vibration electric generator allows, for example more than 10mm, if perhaps miniature vibration electric generator has a more than operating frequency, two or more spring leafs can be set.If two spring leafs are set, one of them spring leaf can be attached in the side bottom level of magnetic bowl between the inwall of the sidepiece of magnetic bowl 17 and support 13, and another spring leaf can be attached in the side top level of magnetic bowl between the inwall of the sidepiece of magnetic bowl 17 and support 13.If setting example is as three spring leafs, these three spring leafs can be respectively be attached between the inwall of the sidepiece of magnetic bowl 17 and support 13 in side bottom, middle part, side and the side top level of magnetic bowl.For example, in the situation that two spring leafs are set, these two spring leafs can have identical resonance frequency, if for example miniature vibration electric generator has single operating frequency---and the resonance frequency of two spring leafs can equal the operating frequency of miniature vibration electric generator; Perhaps, these two spring leafs can have different resonance frequencys, if for example miniature vibration electric generator has two different operating frequencies---and the resonance frequency of two spring leafs can equal respectively two different operating frequencies of miniature vibration electric generator.
In the situation that the height of miniature vibration electric generator is larger, arrange spring leaf by two or more different parts on its short transverse, can make the work of miniature vibration electric generator more stable.In addition, by two or more spring leafs are set, can be so that miniature vibration electric generator be all realized larger output under different operating frequencies.
The below provides an example of embodiment shown in Figure 1.
Miniature vibration electric generator:
Shape: circle;
Size of main body: diameter is 16mm, high 6mm.
Coil:
Shape of cross section: circle;
The wire that by diameter is 0.1mm forms by the conventional method coiling, and wire is made of copper;
Size of main body: diameter is 11.4mm, high 3mm.
Upper cover:
Shape of cross section: circle;
Size of main body: diameter is 14mm, high 0.5mm;
By 30% glass enhancement mode PPA(polyphthalamide available from Dupont HTNFR52G30NH) make.
The center magnet steel:
Shape of cross section: circle;
Size of main body: diameter is 10mm, high 2.5mm;
Material is neodymium-iron-boron magnetic material, by making available from opening up the N48H that makes every effort to open up Science and Technology Ltd..
The central guiding magnetic sheet:
Shape of cross section: circle;
Size of main body: diameter is 10.1mm, high 0.6mm;
Material is mild steel.
The magnetic bowl:
Totally cylindrical;
Bottom transverse cross sectional shape: circle;
Size of main body: diameter is 13mm, and the height of lateral projections section corresponding part is 4mm, and the height of remainder is 0.6mm;
Material: mild steel.
Support:
Shape of cross section: circle;
Size of main body: diameter is 16mm, high 6mm;
By 30% glass enhancement mode PPA(polyphthalamide available from Dupont HTNFR52G30NH) make.
Bottom:
Shape of cross section: circle;
Size of main body: diameter is 14mm, high 0.5mm;
By 30% glass enhancement mode PPA(polyphthalamide available from Dupont HTNFR52G30NH) make.
Spring leaf:
Totally rounded, as shown in Figure 4;
Size of main body: outer ring diameter is that 15.5mm, interior ring diameter are that 13mm, thickness are 0.6mm;
Material: nickel-chromium steel;
Cantilever quantity: 3;
Resonance frequency 50-100Hz.
Use respectively following vibration source equipment to test under the following conditions to 10 miniature vibration electric generator sample 1-10 that make according to this example:
Vibration source equipment: the D-200-3 electric vibration experiment that Suzhou Sushishiyan Instrument Co., Ltd produces;
Experimental condition: vibration frequency is that 100Hz, acceleration are 0.5g(4.9(m/s
2)), time of vibration 5min.
For the test of carrying out for each sample in these 10 samples, utilize the model of Dongguan Huayi Instrumentation Technology Co., Ltd's production to be coil resistance and output voltage and the calculating of the universal instrument specimen of MS8221, obtain the data in table 1:
Table 1
Can find, the electromagnetic miniature vibrating electricity generator of the prior art of mentioning with preamble is compared, and the electromagnetic miniature vibrating electricity generator of above-mentioned embodiment of the present invention has less volume, can provide larger power stage simultaneously.
In another embodiment of the present invention, the electromagnetic miniature vibrating electricity generator comprises housing, flexibly is attached to the magnetic circuit part of housing and be attached to the coil of housing.Magnetic circuit part comprises the magnetic bowl, stack and be fixed on with being centered center magnet steel on the magnetic bowl, with center magnet steel arranged concentric and surround at least in part the center magnet steel and stacked and be fixed on edge magnet steel on the magnetic bowl.The magnetic bowl covers the bottom of center magnet steel and the bottom of edge magnet steel.Limit magnetic gap between center magnet steel and edge magnet steel.Coil is arranged in magnetic gap at least in part.
Housing can form a cavity.Magnetic bowl, center magnet steel, edge magnet steel, coil are placed in housing.Because magnetic circuit part flexibly is attached to housing, when the electromagnetic miniature vibrating electricity generator for example moves up and down, cause center magnet steel in magnetic circuit part and edge magnet steel with respect to coil movement, result is equivalent to coil is made cutting magnetic line in magnetic field motion, thereby produces induced current in coil.Like this, can produce induced current output.
Fig. 2 schematically shows a preferred embodiment of electromagnetic miniature vibrating electricity generator of the present invention with the form of sectional view.
The difference of the embodiment shown in the embodiment shown in Fig. 2 and Fig. 1 mainly is: in the embodiment shown in Fig. 2, also comprise edge magnet steel 28, and the edge magnetic conductive board 29 that is stacked and be fixed on magnet steel top, edge.Wherein, the edge magnetic conductive board covers the top of edge magnet steel.Preferably, top periphery one distance of the periphery excess edge magnet steel 28 of edge magnetic conductive board 29, for example 0.2mm.In addition, the magnetic bowl 27 shown in Fig. 2 is being different from the magnetic bowl 17 shown in Fig. 1 in shape.
For in Fig. 2 with Fig. 1 in same or analogous parts and aspect, repeat no more here.
At magnetic bowl 27 in the situation that its sidepiece flexibly is attached to the sidepiece of housing by spring leaf 24, preferably, stack on its of magnetic bowl 27 and its of the marginal portion of built-in edge magnet steel 28 and magnetic bowl 27 on stack and the core of fixed center magnet steel 26 between form a step, make and form a breach under the marginal portion of magnetic bowl, as shown in Figure 2.Magnetic bowl 27 flexibly is attached to the sidepiece of housing by spring leaf 24 under the marginal portion at its sidepiece.This breach provides for the space that holds spring leaf 24 and allow spring leaf 24 to move up and down.By forming this breach, can be convenient to mounting spring sheet 24 more compactly, and between bottom, the marginal portion of magnetic bowl and spring leaf 24 the certain space of formation, make the moving up and down of spring leaf 24 can be unrestricted.In addition, in the situation that form this breach, the thickness of edge magnet steel 28 can be less than the thickness of center magnet steel 26, so that the top of edge magnet steel 28 flushes with the top of center magnet steel 26.
Edge magnetic conductive board 29 can be made by mild steel, and its effect is to collect the magnetic line of force, makes Distribution of Magnetic Field more concentrate on coil region.Can make the periphery of edge magnetic conductive board 29 exceed top periphery one distance of its edge magnet steel 28 that covers, so that edge magnetic conductive board 29 is brought into play its effect better.For example, in the situation that edge magnetic conductive board 29 and edge magnet steel 28 are circle, can make the diameter of edge magnetic conductive board 29 than the slightly larger in diameter of edge magnet steel 28, for example large 0.4-1.0mm---like this, but the top periphery 0.2-0.5mm of the periphery excess edge magnet steel 28 of edge magnetic conductive board 29.
In the embodiment of Fig. 2, magnetic gap forms between edge magnet steel 28 and center magnet steel 26.Magnetic bowl 27 mainly works to collect the magnetic line of force makes Distribution of Magnetic Field more concentrate on coil region.
For the embodiment shown in Fig. 2, spring leaf 24 can be changed between the sidepiece of the sidepiece that is attached at edge magnetic conductive board 29 and housing; Perhaps, an additional spring leaf can be set, this additional spring leaf is attached between the sidepiece of the sidepiece of edge magnetic conductive board 29 and housing.In the situation that there is spring leaf to be attached between the sidepiece of the sidepiece of edge magnetic conductive board 29 and housing, preferably, form a step between the inner part of the close center of edge magnetic conductive board 29 magnet steel 26 and the remainder of edge magnetic conductive board 29 (calling " outer part " in the following text), make and form a breach on the outer part of edge magnetic conductive board 29.Edge magnetic conductive board 29 flexibly is attached to the sidepiece of housing by spring leaf on outer part at its sidepiece.This breach provides for the space that holds spring leaf and allow spring leaf to move up and down.By forming this breach, can be convenient to mounting spring sheet more compactly, and form certain space between the outer part top of edge magnetic conductive board 29 and spring leaf, make the moving up and down of spring leaf can be unrestricted.
Electromagnetic miniature vibrating electricity generator of the present invention can be applicable in various suitable uses can be used in such equipment electric power to be provided, to realize vibration monitoring etc. such as electromagnetic miniature vibrating electricity generator of the present invention in vibrative equipment.
Should be understood that above-mentioned embodiment and embodiment only presented for purpose of illustration with the purpose of explanation, those skilled in the art can make many remodeling and variant in the situation that do not depart from the scope of the invention.Scope of the present invention is limited only by the accompanying claims.
Claims (10)
1. electromagnetic miniature vibrating electricity generator, it is characterized in that, comprise housing, magnetic circuit part and be attached to the coil of housing, magnetic circuit part flexibly is attached to housing at one parts places, magnetic circuit part produces magnetic field and limits magnetic gap, and coil is arranged in magnetic gap at least in part.
2. electromagnetic miniature vibrating electricity generator according to claim 1, wherein magnetic circuit part comprises the magnetic bowl, stacks and be fixed on with being centered the center magnet steel on the magnetic bowl, the magnetic bowl covers the bottom of center magnet steel, and have from its bottom extend, spaced apart and surround the lateral projections section of the side of center magnet steel with the side of center magnet steel, limit magnetic gap between the side of lateral projections section and center magnet steel.
3. electromagnetic miniature vibrating electricity generator according to claim 2, wherein magnetic circuit part also comprises the central guiding magnetic sheet, the central guiding magnetic sheet is stacked and is fixed on the top of center magnet steel, makes the central guiding magnetic sheet cover the top of center magnet steel.
4. electromagnetic miniature vibrating electricity generator according to claim 3, wherein top periphery one distance of the periphery overcenter magnet steel of central guiding magnetic sheet.
5. electromagnetic miniature vibrating electricity generator according to claim 2, wherein said parts comprise the magnetic bowl, the magnetic bowl flexibly is attached to the sidepiece of housing by spring leaf at its sidepiece.
6. electromagnetic miniature vibrating electricity generator according to claim 2, wherein said parts comprise the magnetic bowl, the magnetic bowl flexibly is attached to the bottom of housing in its bottom by helical spring.
7. electromagnetic miniature vibrating electricity generator according to claim 1, wherein magnetic circuit part comprise the magnetic bowl, stack and be fixed on with being centered center magnet steel on the magnetic bowl, with center magnet steel arranged concentric and surround at least in part the center magnet steel and stacked and be fixed on edge magnet steel on the magnetic bowl, the magnetic bowl covers the bottom of center magnet steel and the bottom of edge magnet steel, limits magnetic gap between center magnet steel and edge magnet steel.
8. electromagnetic miniature vibrating electricity generator according to claim 7, wherein magnetic circuit part also comprises at least one in central guiding magnetic sheet and edge magnetic conductive board, the central guiding magnetic sheet is stacked and is fixed on the top of center magnet steel, make the central guiding magnetic sheet cover the top of center magnet steel, the edge magnetic conductive board is stacked and is fixed on the top of edge magnet steel, makes the edge magnetic conductive board cover the top of edge magnet steel.
9. electromagnetic miniature vibrating electricity generator according to claim 8, top periphery one distance of the periphery excess edge magnet steel of wherein top periphery one distance of the periphery overcenter magnet steel of central guiding magnetic sheet, and/or edge magnetic conductive board.
10. electromagnetic miniature vibrating electricity generator according to claim 7, wherein said parts comprise the magnetic bowl, the magnetic bowl flexibly is attached to the sidepiece of housing by spring leaf at its sidepiece.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017088303A1 (en) * | 2015-11-26 | 2017-06-01 | 刘远芳 | Kinetic-energy power generation apparatus, wireless transmitter, and manufacturing method and application thereof |
| CN109425423A (en) * | 2017-08-28 | 2019-03-05 | Vega格里沙贝两合公司 | Vibrating sensor |
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| WO2017088303A1 (en) * | 2015-11-26 | 2017-06-01 | 刘远芳 | Kinetic-energy power generation apparatus, wireless transmitter, and manufacturing method and application thereof |
| CN109425423A (en) * | 2017-08-28 | 2019-03-05 | Vega格里沙贝两合公司 | Vibrating sensor |
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