JP3674444B2 - Small generator and electronic device equipped with the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a small generator incorporated in a portable electronic device such as a wristwatch.
[0002]
[Background]
Conventionally, small generators incorporated in portable electronic devices such as wristwatches are known. For example, Japanese Patent Laid-Open No. 9-203785 discloses a pointer-type electronic timepiece in which a generator that generates electricity by rotating a rotor of a generator with a rotary weight is incorporated. Japanese Patent Application Laid-Open No. 10-2203939 discloses that mechanical energy when a spring is released is transmitted to a generator via a speed increasing wheel train, and is converted into electric energy by the generator, and rotation control is performed by the electric energy. There is disclosed an electronically controlled mechanical timepiece that operates a means to control the rotational speed of a generator to accurately move a pointer fixed to a train wheel and display the time accurately.
[0003]
In such a small power generator incorporated in each timepiece, since the size is limited, the size of the rotary weight and the spring is also limited, and the driving torque for driving the power generator is small. For this reason, when the rotor of the generator is stopped and the rotor starts to rotate, if the cogging torque applied to the rotor is large, the driving torque that overcomes the cogging torque and rotates the rotor cannot be obtained. There was a problem that it was difficult to start up, or that it did not restart when the rotor stopped due to impact on the watch.
[0004]
In particular, an electronically controlled mechanical timepiece that rotates the rotor of the generator from the mainspring via the speed increasing wheel train has a smaller driving torque than a generator that rotates the rotor by a rotating weight, and therefore the cogging torque is reduced. It was necessary to make the impact smaller.
[0005]
For this reason, conventionally, in order to reduce the cogging torque, an inner notch is formed on the stator surface facing the rotor magnet. That is, the cogging torque before the inner notch is formed and the cogging torque generated by forming the inner notch are added to adjust the cogging torque to 0 as a whole.
[0006]
[Problems to be solved by the invention]
By the way, a general generator including each of the above-described generators includes a core portion around which a stator and a coil are wound. These are at least for reasons such as facilitating coil winding work. It is composed of two metal members.
[0007]
However, when it is composed of two bodies, there is a connecting portion of each member in the magnetic circuit. If there is a connection part of each member in the magnetic circuit, the magnetic resistance changes greatly depending on the connection state. Therefore, the cogging torque that varies depending on the magnetic resistance of the magnetic circuit also varies in each assembled generator. There was a problem that it was likely to occur.
[0008]
If the cogging torque varies, the cogging torque cannot be completely canceled out to zero even if the inner notch of the same size is formed, and it is difficult to sufficiently reduce the cogging torque. there were.
[0009]
Such a generator that cannot sufficiently reduce the cogging torque and is inferior in the startability of the generator is disposed of as a defective product in the inspection process, and accordingly, the yield decreases and the manufacturing cost increases. There was a point.
[0010]
An object of the present invention is to provide a small generator capable of eliminating variations in magnetic resistance in a magnetic circuit and reducing variations in cogging torque.
[0011]
[Means for Solving the Problems]
The small power generator of the present invention is a small power generator including a rotor, a stator, and a coil wound around the stator, and the stator includes a pair of stator portions disposed adjacent to the rotor, and the coil includes A stator core portion to be wound and configured integrally; A circular ring-shaped positioning member is provided between the inner peripheral surface of the pair of stator portions and the rotor, and the diameter of the inner peripheral surface is the state before the stator portion comes into contact with the positioning member. When the stator portion is formed to be smaller than the diameter of the outer peripheral surface of the positioning member and the stator portion is brought into contact with the positioning member, the stator portion is pressure-bonded to the outer peripheral surface by its own elastic deformation. It is characterized by that.
[0012]
In the present invention, the stator is integrally formed including the stator portion and the stator core portion, and since there is no connection portion of each member in the magnetic circuit, there is no variation in the magnetic resistance, thereby cogging torque. Variation can be reduced, and the value of the cogging torque can be stabilized. Then, the stator portion can be aligned only by fitting the stator portion into the positioning member, and the eccentricity of the stator portion and the rotor magnet can be reduced. For this reason, compared with the case where a positioning jig is used, a number of parts can be decreased and assembly workability | operativity can be improved.
[0013]
At this time, it is preferable that an inner notch is formed in the stator portion of the stator.
[0014]
In the present invention, variations in magnetic resistance in the magnetic circuit can be eliminated, and the magnitude of the cogging torque before forming the inner notch can be stabilized. Therefore, if the inner notch that cancels the cogging torque is formed, the size of the cogging torque to be canceled is constant, and therefore the inner notch that can reliably cancel the cogging torque can be easily formed. A generator reduced to almost zero can be easily configured.
[0015]
Thereby, even in a small generator with a small driving torque, the cogging torque can be reliably reduced, and the startability of the rotor can be improved. Further, this can reduce the incidence of defective products and improve the yield, thereby reducing the manufacturing cost.
[0016]
Since the cogging torque can be surely reduced, even if it is stopped by an impact, it can be restarted immediately, and the inertia disc provided so that the rotor does not stop can be reduced, and the impact resistance performance can be improved. In addition, the inertia disk can be made smaller, and the force applied to the rotor bearing can be reduced accordingly, so that the bearing diameter can be reduced and friction loss can be reduced. For example, when rotating the rotor with mechanical energy from the mainspring. Can reduce the loss of mechanical energy and increase the duration.
[0017]
Here, it is preferable that the coil is wound around a bobbin, and the bobbin is inserted into the stator. When the stator is formed integrally, it must be formed in a substantially U shape such as a U shape or a J shape. When winding a coil directly on such a stator, the workability is lower than when winding a coil around a conventional I-shaped core, but the coil is wound around a bobbin and the coil is wound. If the bobbin is inserted into the stator, the coil winding workability is not lowered, and the manufacturing efficiency can be improved.
[0018]
Here, it is preferable that the stator is formed in a substantially U-shape in a plane and provided with a pair of stator core portions parallel to each other, and a coil is wound around each stator core portion. If two coils are provided, the magnetic circuit can be shortened compared with the case where one coil is provided, and the iron loss can be reduced accordingly.
[0019]
At this time, it is preferable that the coils have the same number of turns and are connected in series. If each coil has the same number of turns and is arranged in parallel and connected in series, the same number of magnetic fluxes generated by the magnetic field generated outside the generator can flow between the two coils. The influence can be reduced.
[0020]
In addition, it is preferable that a positioning member capable of contacting the inner peripheral surface of each stator portion (stator hole) and a positioning jig for pressing each stator portion against the positioning member are provided.
[0021]
If the rotor magnet is eccentric with respect to each stator part and the gap between each stator part and the rotor magnet is not uniform, the rotor is strongly pulled by one stator part and the cogging torque is increased, or the number of magnetic fluxes flowing through the coil is increased. The amount of power generated and the torque that rotates the generator are not stable. At this time, if the position of the stator portion is set while measuring the gap between the stator portion and the rotor magnet, the assembling workability is lowered. On the other hand, if the positioning member and the positioning jig as described above are provided, each stator can be positioned accurately and easily in a state where the rotor is disposed between the stator portions.
[0023]
In this case, the stator portion can be aligned only by fitting the stator portion into the positioning member, and the eccentricity of the stator portion and the rotor magnet can be reduced. For this reason, compared with the case where a positioning jig is used, a number of parts can be decreased and assembly workability | operativity can be improved.
[0024]
The stator is preferably configured by stacking thin plates made of an amorphous material.
[0025]
If the stator is made of an amorphous material having a small iron loss, a low-loss generator can be formed. This amorphous material has a small iron loss and is suitable as a stator material. However, the conventional two-body stator cannot be put into practical use because the magnetic resistance of the joint becomes too large. That is, the amorphous material can only be formed to a thickness of about 20 μm and can only be formed in a thin plate shape, and therefore, it must be used by stacking 20 to 30 sheets. When two conventional stators are formed of such an amorphous material, even if an attempt is made to join the end surfaces where the laminated surfaces are exposed, each layer is thinly displaced, so the magnetic resistance is very large. Become. On the other hand, when a connection plate arranged across each stator is used, the amorphous layers are thin, so that the magnetic flux hardly flows in the thickness direction of each layer due to the influence of the demagnetizing field, and the magnetic flux is also generated in the connection plate portion. The magnetic resistance becomes very large because it does not flow easily. Therefore, when the stator is composed of two members as in the prior art, the stator cannot be composed of an amorphous material. On the other hand, in the present invention, since the stator is composed of one body, even if it is composed of an amorphous material, a junction portion is not generated in the magnetic circuit and the magnetic resistance can be reduced. A low-loss generator with low iron loss can be configured.
[0026]
The magnet of the rotor may be a two-pole magnet, but is preferably a multipole magnet having four or more poles.
The electromotive force of the generator is a change in the number of turns of the coil × the magnetic flux with time. If the number of coils is increased, the temporal change in the magnetic flux increases. For this reason, when the electromotive voltage is set to be the same as that in the case of the dipole magnet, the amount of magnetic flux can be reduced, so that the cogging torque can be reduced.
[0027]
An electronic apparatus according to the present invention includes the above small generator.
[0028]
Here, it is preferable that the electronic device is an electronic timepiece that performs time display using electrical energy generated by the small generator.
[0029]
The electronic apparatus includes a mechanical energy source, a mechanical energy transmission device that transmits mechanical energy from the mechanical energy source to a rotor of the small generator, and an electric power supplied from the small generator. It is preferable to include a rotation control device that is driven by energy to control a rotation cycle of the rotor of the small generator, and a pointer attached to the mechanical energy transmission device.
[0030]
According to such electronic devices such as an electronic timepiece, since the cogging torque acting on the rotor of the generator can be reduced, the rotating weight and the mainspring for driving the rotor can be reduced in size and can be reduced in size. It can be a generator. For this reason, the electronic device in which the generator is incorporated can be sufficiently reduced in size and can be made portable. Further, it can be sufficiently applied to a small electronic timepiece such as a wristwatch.
[0031]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a plan view showing a main part of an electronically controlled mechanical timepiece 100 incorporating a generator 20 according to a first embodiment of the present invention, FIG. 2 is a sectional view thereof, and FIG. 3 is a perspective view.
[0032]
The electronically controlled mechanical timepiece 100 includes a barrel 1 composed of a mainspring 1a, barrel barrel 1b, barrel barrel true, and barrel lid 1d. The mainspring 1a is fixed to the barrel complete 1b at the outer end and to the barrel full at the inner end. The barrel barrel true is inserted into a support member provided on the main plate 2 and fixed by a square hole screw 5, and rotates integrally with the square hole wheel 4. The main plate 2 is attached with a disk-shaped dial 2b.
[0033]
The rotation of the barrel gear 1b is increased by a total of 126,000 times through the respective number wheels 7 to 11 serving as speed-up wheel trains. At this time, each of the numbered wheels 7 to 11 is provided on a different axis and disposed at a position that does not overlap a coil 140 described later, and forms a torque transmission path from the mainspring 1a.
[0034]
A minute hand (not shown) for displaying the time is fixed to the cylindrical pinion 7a engaged with the center wheel & pinion 7a, and a second hand (not shown) for displaying the time is fixed to the second pinion 14a. Therefore, in order to rotate the second wheel 7 at 1 rph and the second kana 14a at 1 rpm, the rotor 12 may be controlled to rotate at 5 rpm. The barrel gear 1b at this time is 1/7 rph.
[0035]
The electronically controlled mechanical timepiece 100 includes a generator 20 that includes a rotor 12 and a stator 130. The rotor 12 includes a rotor pinion 12a, a two-pole rotor magnet 12b, and an inertia disc 12c.
[0036]
As shown in FIGS. 3 to 5, the stator 130 is configured by laminating a plurality of planar U-shaped (U-shaped) thin plates 131 made of an amorphous material. Specifically, as described in the sectional view of the stator 130 in FIG. 5, 20 thin plates 131 are laminated. Here, the amorphous material is not particularly limited, but a Co-based amorphous metal whose main component is cobalt, an Fe-based amorphous metal whose main component is iron, and the like can be used. In particular, in the electronically controlled mechanical timepiece 100, a Co-based amorphous metal having a small iron loss at a low frequency of about 10 Hz is suitable.
[0037]
The stator 130 includes a pair of stator portions 132 that are disposed to face the rotor 12, a pair of stator core portions 133 that are formed continuously with the stator portion 132 and the coils 140 are disposed, and the stator core portions 133. It is provided with a connecting portion 134 that connects the two, and is formed in a substantially U-shaped plane.
[0038]
A stator hole 132a formed of an arcuate concave portion is formed on the inner peripheral surface of each stator portion 132, and an inner notch 135 is formed in the stator hole 132a.
[0039]
As shown in FIGS. 3 and 5, the coil 140 disposed in the stator core portion 133 is wound around the bobbin 150. The bobbin 150 is formed in a substantially rectangular tube shape, and a coil 140 is wound around the outer periphery thereof. Further, a coil lead board 151 is projected from the bobbin 150 as shown in FIG. 3, and an end of the coil 140 is connected to a circuit 152 on the coil lead board 151.
[0040]
The center hole 153 of the bobbin 150 substantially matches the cross-sectional shape and size of the stator 130, and the bobbin 150 is disposed in the stator core portion 133 by inserting the stator 130 into the hole 153. Further, in a state where the bobbin 150 is disposed on the stator core portion 133, each coil lead board 151 is screwed to the ground plane 2 or the like through a hole in the stator 130. At this time, the coil lead substrates 151 are electrically connected, and the coils 140 wound around the bobbins 150 are connected in series.
[0041]
Here, the one stator part 132 and the stator core part 133 are arranged in parallel with the other stator part 132 and the stator core part 133. For this reason, each coil 140 arrange | positioned at each stator core part 133 is mutually arrange | positioned in parallel. Each coil 140 has the same number of turns and is wound in the same direction while being arranged on the stator core portion 133.
[0042]
For this reason, when an external magnetic field is applied to each coil 140, the external magnetic field is applied in the same direction to each coil 140 arranged in parallel, so that the external magnetic fields are opposite to each other in the winding direction of each coil 140. Will join. For this reason, the electromotive voltages generated in the coils 140 due to the external magnetic field work so as to cancel each other, so that the influence can be reduced.
[0043]
Further, the rotor 12 is configured such that the central axis thereof is disposed on a boundary line between the coils 140, and the stator parts 132 and the stator core part 133 are symmetrical with respect to the boundary line.
[0044]
At this time, as shown in FIG. 2, a substantially ring-shaped positioning member 60 is disposed in each stator portion 132 in which the rotor 12 of the stator 130 is disposed, more specifically, in the stator hole 132a. And the positioning jig 55 which consists of an eccentric pin is arrange | positioned on the outer side of the stator part 132 of each stator 130. FIG. When the positioning jig 55 is turned, the stator portion 132 of each stator 130 can be pressed against and brought into contact with the positioning member 60, and the alignment can be performed accurately and easily.
[0045]
In the stator 130, an annular magnetic circuit is formed from the rotor magnet 12b through the one stator part 132, the stator core part 133, the connecting part 134, the other stator core part 133, and the stator part 132 to return to the rotor magnet 12b. At this time, the stator 130 is configured by laminating thin plates 131, and the magnetic flux hardly flows between the thin plates 131 due to the influence of the demagnetizing field, but the magnetic flux sufficiently flows in the thin plates 131 formed in a U shape. A magnetic circuit is formed. That is, a magnetic circuit is configured by each thin plate 131 portion, and the stator 130 as a whole has a configuration in which a plurality of magnetic circuits are bundled.
According to this embodiment, there are the following effects.
[0046]
1) Since the one-piece stator 130 having no connection part in the middle of the magnetic circuit is used, there is no variation in the magnetic resistance in the magnetic circuit, and the cogging torque applied to the rotor 12 in a state where the inner notch 135 is not formed is also a predetermined value. Can be stabilized. Therefore, the inner notch 135 can be formed so as to surely cancel the cogging torque, and the cogging torque can be reduced to almost zero.
[0047]
2) Since the cogging torque can be reliably and very small, the startability of the rotor 12 can be improved even in the small generator 20 having a small driving torque. In addition, the occurrence rate of defective products whose startability is lowered can be reduced and the yield can be improved, so that the manufacturing cost can be reduced.
[0048]
Further, since the cogging torque can be surely reduced, even if the cogging torque is stopped by an impact, it can be restarted immediately, and the inertia disc 12c provided so that the rotor 12 does not stop can be reduced, and the impact resistance performance can be improved. Further, the diameter of the bearing of the rotor 12 can be reduced by the amount that the inertia disk 12c can be reduced, and the friction loss can be reduced. For this reason, in order to rotate the rotor 12 with the mechanical energy from the mainspring 1a, even in the electronically controlled mechanical timepiece 100 in which the driving torque of the generator 20 is small, the loss of mechanical energy is reduced and the duration is increased. be able to.
[0049]
3) Since each coil 140 is wound around each bobbin 150 and this bobbin 150 is inserted into the stator 130 and the coil 140 is disposed, the coil 140 can be easily disposed even with the U-shaped stator 130. For this reason, the fall of the winding workability | operativity of the coil 140 can be prevented, and manufacturing efficiency can be improved.
[0050]
4) Since each of the stator core parts 133 is provided with the coils 140 and the two coils 140 are provided, the magnetic circuit can be shortened compared with the case of providing one coil, and the iron loss is reduced accordingly. can do.
[0051]
In addition, since the inertia disc 12c can be made smaller, the inertia disc 12c can be brought closer to the coil 140 side as compared with the prior art, and accordingly, the magnetic circuit can be shortened and the iron loss can be further reduced. .
[0052]
5) The coils 140 have the same number of turns and are connected in series, and are arranged in parallel, so that the influence of the magnetic field generated outside the generator 20 can be counteracted. The influence of the magnetic field can be reduced.
[0053]
6) Since the positioning member 60 capable of contacting the inner peripheral surface of the stator hole 132a of each stator portion 132 and the positioning jig 55 that presses each stator portion 132 against the positioning member 60 are provided, the rotor 12 and the stator The amount of eccentricity 130 can be reduced, and the stator 130 can be easily installed at a predetermined position.
[0054]
7) Since the eccentricity between the stator hole 132a and the rotor 12 can be reduced by the positioning member 60 and the positioning jig 55, the variation in permeance can be reduced, and the fluctuation in the amount of flowing magnetic flux can also be suppressed. Can be reliably reduced.
[0055]
8) Since the stator 130 is configured by laminating thin plates 131 made of an amorphous material, the iron loss can be reduced and the low-loss generator 20 can be configured.
[0056]
FIG. 6 shows a generator 200 according to the second embodiment of the present invention. The generator 200 of the present embodiment is used as a generator of an electronically controlled mechanical timepiece as in the first embodiment, and uses a multipolar magnet 201 as a rotor magnet. In the present embodiment, the 14-pole multipole magnet 201 is used, but a 10-pole, 18-pole, etc. multipole magnet 201 may be used as long as the multipole magnet 201 has at least 4 poles or more. At this time, when incorporated in a stator 130 including symmetrical stator portions 132, a multipolar magnet 201 having about 10 poles, 14 poles, and 18 poles is realistic.
[0057]
Further, the inner diameter of the stator hole 132a, that is, the inner diameter between the stator portions 132 is slightly smaller than the outer shape of the ring-shaped positioning member 60, and when the stator portions 132 are inserted into the positioning members 60, Each stator portion 132 is slightly curved and is configured to be crimped to the positioning member 60 by its elastic force.
[0058]
Even when the generator 200 using such a multipolar magnet 201 is used, since the single stator 130 is used, variation in magnetic resistance can be reduced, and the cogging torque applied to the rotor magnet can be stabilized at a predetermined value. Therefore, the same operational effects as 1) to 8) of the first embodiment can be achieved, such as forming the inner notch 135 in accordance with the cogging torque and making the cogging torque almost zero.
[0059]
9) In addition, since the multipolar magnet 201 is used, when it is set to generate the same electromotive voltage as in the case of the dipole magnet, the amount of magnetic flux flowing through the stator 130 can be reduced, and the cogging torque is reduced accordingly. Therefore, the startability can be improved even when the inner notch 135 is not formed. That is, the electromotive voltage of the generator 200 is the change in the number of turns of the coil 140 × the time of the magnetic flux, and if it is multipole, the time change of the magnetic flux increases. . For this reason, since the amount of magnetic flux can be reduced, the cogging torque can be reduced.
[0060]
10) Furthermore, in the electronically controlled mechanical timepiece, the output waveform of the rotor 12 is detected and feedback control is applied to adjust the rotational speed of the rotor 12. For this reason, if the change of the output waveform per rotation of the rotor 12 is increased by using multiple poles, the rotation of the rotor 12 can be controlled more finely.
[0061]
11) The stator portion 132 can be positioned simply by fitting the stator portion 132 into the positioning member 60, and the positioning jig 55 of the first embodiment can be dispensed with, so that the number of parts can be reduced and assembly workability can be reduced. Can also be improved.
[0062]
FIG. 7 shows a generator 300 according to the third embodiment of the present invention. The generator 300 is different from the embodiment described above in that the rotor 12 is rotated by the rotating weight 310, while the rotor 12 is rotated by the mainspring 1a. That is, the generator 300 is incorporated in the pointer-type electronic timepiece 301, and a single weight rotary weight 310 that rotates by the movement of the arm so that power is generated when the arm with the pointer-type electronic timepiece 301 is moved. The rotor 12 is rotated by receiving kinetic energy from the rotating weight 310, the stator 130, and the coil 140 wound around the stator 130. The rotating weight 310 and the rotor 12 are mechanically connected by a power generation wheel train 360 that transmits the rotating operation of the rotating weight 310 at an increased speed.
[0063]
In the pointer-type electronic timepiece 301, the electric power generated by the generator 300 is stored in the secondary battery 320, and a step motor (not shown) is driven by this electric power to operate the pointer.
[0064]
The stator 130 and the coil 140 of the generator 300 may be basically the same as those in the first embodiment. However, since the driving torque by the rotary weight 310 is larger than that of the mainspring 1a, the generator 300 Compared with the machine 20, the magnet is enlarged to increase the magnetic flux, and the coil 140 is made thicker to reduce the coil resistance in order to reduce the resistance loss with a large generated current. It is preferable to make changes such as using high-Fe as the main component.
[0065]
Also in this embodiment, the effects 1) to 8) of the first embodiment can be obtained by the fact that the stator 130 is a single stator. Furthermore, also in the generator 300, the rotor magnet 12b may be comprised with a multipolar magnet, and in this case, the effect of said 9) -10) can be show | played.
[0066]
Note that the present invention is not limited to the above-described embodiments, and includes other configurations that can achieve the object of the present invention. The following modifications and the like are also included in the present invention.
[0067]
For example, the stator is not limited to a configuration in which each stator part 132 and each stator core part 133 are arranged in parallel with respect to a boundary line passing through the rotation center of the rotor 12 and have a bilaterally symmetric shape as in the above embodiments. Instead, as shown in FIG. 8, for example, a left-right asymmetric stator 430 formed in a substantially plane J shape or the like may be used. In short, the stator only needs to be integrally formed so that no joint is formed in the magnetic circuit, and its specific shape and structure may be set as appropriate in implementation.
[0068]
Further, the stators 130 and 430 are not limited to those formed of an amorphous material, but may be any one that can constitute a magnetic circuit. For example, Co-based amorphous and 78% Ni permalloy C have similar characteristics, and Fe-based amorphous and 45% Ni permalloy B have similar characteristics. . Therefore, a permalloy material other than an amorphous material may be used.
[0069]
The coil 140 is not limited to the one wound around the bobbin 150 but may be directly wound around the stator core part 133. Furthermore, two coils 140 may be provided as in the first to third embodiments, one may be provided as in the modification shown in FIG. 8, and three or more may be provided. What is necessary is just to set suitably in implementation.
[0070]
Further, the inner notch 135 is not necessarily formed. That is, if the cogging torque is not constant, the driving torque from the mainspring 1a and the rotary weight 310 must be set to be large, resulting in problems such as a decrease in duration. On the other hand, if the magnetic resistance is constant and the cogging torque is stabilized at a predetermined value, the rotor 12 is always started only by setting the drive torque from the mainspring 1a and the rotary weight 310 slightly larger than the cogging torque. Therefore, it is possible to configure a generator with good startability without forming the inner notch 135, and to increase the duration.
[0071]
Further, in the present invention, since the cogging torque can be reduced, the inertia disc 12c may have a small diameter, a small moment of inertia, or the inertia disc 12c may be eliminated.
[0072]
Further, the generator of the present invention is not limited to the one incorporated in each of the timepieces 100 and 301, and may be incorporated into various types of timepieces such as a digital display type wristwatch, a table clock other than the wristwatch, and a clock. Furthermore, mobile phones other than watches, pagers, calculators, portable personal computers, portable radios, pedometers, shaving, portable blood pressure monitors, electronic notebooks, PDAs (small information terminals, “Personal Digital Assistant”), toys, ICs It can be used as a power source for various electronic devices such as cards, keys for cars and houses. In particular, since the cogging torque acting on the rotor 12 can be reduced, the rotating weight 310, the mainspring 1a, etc. can be reduced in size and can be made into a very small generator. Is optimal. Of course, the present invention can also be applied to non-portable electronic devices. In such portable electronic devices, dry batteries and chargers have been used in the past. However, if the generator of the present invention is incorporated, electronic circuits and mechanisms in electronic devices can be used without batteries. The processing device can be operated, battery replacement is unnecessary, and the environment can be considered. In addition, if it is configured to be driven by a rotary weight or mainspring, it can generate power manually, eliminating the need for a charging operation such as a charger, and enabling electronic devices to operate even during disasters, outdoors, or when going out. it can.
[0073]
【The invention's effect】
As described above, according to the small power generator and the electronic apparatus according to the present invention, there is an effect that variations in magnetic resistance can be eliminated and variations in cogging torque can be reduced.
[Brief description of the drawings]
FIG. 1 is a plan view showing a schematic configuration of an electronically controlled mechanical timepiece incorporating a generator according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view showing the configuration of the electronically controlled mechanical timepiece shown in FIG.
FIG. 3 is an exploded perspective view showing a main part of the generator according to the first embodiment.
FIG. 4 is a cross-sectional view showing a main part of the generator according to the first embodiment.
FIG. 5 is a cross-sectional view showing a stator core portion of the generator according to the first embodiment.
FIG. 6 is a schematic plan view showing a generator according to a second embodiment of the present invention.
FIG. 7 is a schematic plan view showing a pointer type electronic timepiece according to a third embodiment of the invention.
FIG. 8 is a schematic plan view showing a generator according to a modification of the present invention.
[Explanation of symbols]
1 barrel
1a Spring
2 Ground plane
7-11 each car
12 Rotor
12a rotor
12b Rotor magnet
12c Inertial disc
20 Generator
55 Positioning jig
60 Positioning member
100 Electronically controlled mechanical clock
130, 430 stator
131 sheet
132 Stator
132a Stator hole
133 Stator core
134 connection
135 Notch inside
140 coils
150 bobbins
151 Coil lead board
153 Center hole
200 generator
201 Multi-pole magnet
300 generator
301 Pointer-type electronic watch
310 Rotating weight
360 train wheel for power generation
430 Stator

Claims (10)

A small generator comprising a rotor, a stator, and a coil wound around the stator,
The stator is configured integrally with a pair of stator portions arranged adjacent to the rotor and a stator core portion around which the coil is wound,
A circular ring-shaped positioning member is provided between the inner peripheral surface of the pair of stator portions and the rotor,
In a state before the stator portion is brought into contact with the positioning member, the diameter of the inner peripheral surface is formed smaller than the diameter of the outer peripheral surface of the positioning member,
When the stator part is brought into contact with the positioning member, the stator part is pressure-bonded to the outer peripheral surface by its own elastic deformation . 2. The small generator according to claim 1, wherein an inner notch is formed in the stator portion. In small generator according to claim 1 or claim 2, wherein the coil is wound around the bobbin, a small generator the bobbin is characterized in that it is inserted into the stator.   The small generator according to any one of claims 1 to 3, wherein a pair of stator core portions parallel to each other are provided, and coils are wound respectively.   The small generator according to claim 4, wherein the coils have the same number of turns and are connected in series. The small generator according to any one of claims 1 to 5 , wherein the stator is configured by laminating thin plates made of an amorphous material. The small generator according to any one of claims 1 to 6 , wherein the magnet of the rotor is a multipolar magnet. Electronic apparatus, characterized in that it comprises a small generator according to any one of claims 1-7. 9. The electronic device according to claim 8 , wherein the electronic device is an electronic timepiece that displays a time using electrical energy generated by the small generator. The electronic device according to claim 9 , wherein the electronic device includes a mechanical energy source, a mechanical energy transmission device that transmits mechanical energy from the mechanical energy source to a rotor of the small generator, and the small device. An electronic device comprising: a rotation control device that is driven by electrical energy supplied from a generator to control a rotation cycle of a rotor of the small generator; and a pointer attached to the mechanical energy transmission device. machine.

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