JPS6266188A - Electronic wristwatch with generator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to coil winding specifications for a power generating device in an electronic wristwatch with a power generating device that converts mechanical energy into electrical energy.

[Summary of the invention]

The present invention provides a coil winding specification for a power generation device in which mechanical energy obtained by operating an external operating member is converted into electrical energy by relative motion between a magnet rotor and a coil, and the winding volume of the coil is at least 18 (iJ ) or more, and the relationship between the coil winding diameter d (simplified) and the coil winding volume VC (tj) is 450≦vc
/d≦so.

By setting the power generation device so that ] Conventionally, as described in Japanese Unexamined Patent Publication No. 53-22468, a magnet rotor is rotated by increasing the rotation speed obtained by operating an external operating member. 2. Description of the Related Art An electronic wristwatch with a power generation device has been proposed, which charges electric energy generated in a wound coil to two main power sources via a rectifier.

[Problems and Objectives to be Solved by the Invention] However, with conventional power generating devices, there is no known method for efficiently converting mechanical energy obtained by operating external operating members into electrical energy, so it is difficult to drive electronic wristwatches. However, in order to charge the secondary power source with the electrical energy necessary to do this, the external operating member must be operated for a long time.

Therefore, the present invention aims to solve these problems.
The purpose is to maximize the power generation efficiency of the power generation device and operate the external operation member. The aim is to shorten the time and reduce the hassle for the user.

[Means to solve the problem]

In order to solve the above problems, in the present invention, in a power generation device that generates electricity by operating an external operating member, the winding volume of the coil is at least 18- or more, and the winding diameter d (m) of the coil is Winding volume Vc (mJ
) is characterized by the following relationship: 450≦V c /d≦800.

[Effect]

According to the above configuration of the present invention, by winding the coil with a diameter set according to the coil size of the power generation device,
By maximizing the power generation efficiency of the power generation device, it is possible to supply the electrical energy necessary to drive the electronic wristwatch simply by operating the external operation member for a short time.

〔Example〕

FIG. 1 is a schematic plan view showing one embodiment of the present invention. When the crown 2, which is a manually operated operating member, is rotated, the rotating stem 5 and the stop wheel 4 rotate, and this rotation is increased by 300 to 800 times by the intermediate gear α5 and the intermediate gear b6, which are rotationally driven by the stop wheel. speed up and transmit it to the magnet rotor 7. A stator 8 made of a high magnetic permeability material is arranged around the magnet rotor 7, and a coil 9 is wound around the center.

With the above configuration, when the external operation unit is rotated, this rotation is accelerated and transmitted to the magnet rotor 7, and when the magnet rotor 7 rotates, the stator 8 receives a magnetic flux that changes according to the rotation of the magnet rotor 7. is induced. This change in magnetic flux causes the coil/
A voltage is induced in I/9, and mechanical energy generated by operating the external operating section is converted into electrical energy. The electrical energy generated in the coil 9 charges a secondary power source 21 via a charging control circuit 20 as shown in FIG. 22 is a clock mechanism including an electronic circuit.

Here, if the number of turns of the coil is N1, the magnetic flux passing through the coil is φ, and the rotation angle of the magnet rotor is θ, then the voltage E induced in the coil is expressed by the following equation.

dφ dφ dθ = M dφ UE ・・・・・・(1) da/d
t is the rotational speed ω of the magnet rotor, and when the maximum value of the magnetic flux passing through the coil is φmax, the above equation (1) becomes:=Mφmax ωsinθ −·−(2).

In other words, the voltage E induced in the coil is the number of turns of the coil,
The maximum value of magnetic flux passing through the coil, proportional to the rotation speed of the magnet rotor. Further, assuming that the resistance of the coil is RO and the inductance of the coil is L, the impedance 2 of the charging circuit is expressed as follows.

2゜071 stones Ty......From (3), the power generation current is 〈〉〉〉/Z, so〈〈〉〈〉〈〉〈〉〉〉〉〉〉〉〉〉〉〉
Q) SLQ ' / $ ding) ” ---------(
4). As can be seen from the above equation (4), in order to extract a large current value from the power generating device, the number of coil turns must be increased and the coil resistance must be decreased.

Coil resistance is proportional to the length of the coil winding wire and inversely proportional to the cross-sectional area of the coil winding wire, so in order to satisfy the above conditions, it is contradictory to wind a large number of coils with thick coil winding wire. . In other words, when winding a coil within a limited coil size, thin coil windings will increase the number of coil turns, but the coil resistance will increase and sufficient current value will not be obtained, and thick coil windings will As the number of turns decreases, the induced voltage becomes low, and therefore a sufficient current value cannot be obtained. Therefore, when winding a fill in a limited coil size, it is necessary to set the diameter of the fill winding that gives the highest generated current value.

Now, the torque when actually manually rotating the Lieez 2 is about 50 (? crs). Also,
Since the magnet rotor receives a braking force due to electromagnetic induction when it rotates and generates electricity, the magnet rotor is accelerated by the intermediate gear and has a speed of 1600 to 52
It rotates at a rotational speed of 00 (r-p-s).

Figure 3 shows the magnet rotor at a rotational speed of 2400 (r.p-s).
) to reduce the coil winding volume excluding the magnetic core to 5o.
3(d) shows the relationship between the coil winding diameter and the generated current when kept constant.

As can be seen from Figure 3, the coil winding diameter is 38 (μ?
7L) or less, the generated current value decreases rapidly, and even if the fill winding diameter exceeds 60 (μm), the generated current value decreases rapidly. In other words, when the 742 winding volume is 50 -, unless the coil is wound with a 742 winding diameter of 38 to 60 (μm), the power generation performance with this coil volume cannot be fully extracted.This phenomenon occurs. also appears for other fill-wound volumes.

Figure 4 shows the magnet rotor at a rotational speed of 2400 (r.p.s.
), the generated current in each coil winding volume sharply decreases.The ratio of the coil winding diameter dcm) at the upper limit (O mark) and lower limit (x mark) to the coil winding volume VO (j) 'Vol. This is what is shown. #! As shown in Figure 4, in order to fully derive power generation performance from each coil volume, the ratio Vc/d of the coil winding volume vc (wl) and the coil winding wire diameter d (m) (+7) must be set to 450 to 450.
You have to set it between 800 and wind the fill.

Figure 5 shows the magnet rotor at a rotation speed of 2400 (r.p-8).
) shows the relationship between the coil winding volume and the generated current at the optimum coil winding diameter for each coil winding volume.

As can be seen from FIG. 5, the larger the fill volume, the higher the generated current value. At this time, the current consumption of the electronic wristwatch is 1 to 1.5 (μA) per second, so the current consumption for one day is 86.4 (ma-sec) to 129.6 (TI
&A-sc! c). For example, if you try to charge the current consumption for one day within one minute by rotating the crown without taking any breaks, the generated current value will need to be 2 (groove A) or more. Therefore, in the case of the above conditions, the coil winding volume of the power generating device is required to be at least 1 B(-) or more. However, when actually operating the Lies by hand to charge it, there is a period of rest, etc., and it takes 2 to 5 times longer to charge the same amount than when the Lies is rotated without rest. In other words, if the coil winding volume of the generator is 18(-) or less, the crown must be operated for more than 6 minutes to charge the current consumption for 1E1.

Considering the commercial value of an electronic wristwatch with a manual power generator, the time required to operate the battery to charge one day's worth of current consumption is limited to six minutes or less. Therefore, the coil winding volume of the power generating device needs to be at least 18 (mJ) or more. In addition, the coil size at this time is magnetic core width 1.2
(1111), magnetic core thickness [15 (m) and Surt, :l
A/Width 2.5 (w), :! Ill thickness 1.8
(■), the coil length is 5.5 (m). Also, since the power generation coil is built into the electronic wristwatch, the coil winding volume is 1oo (J
) (Magnetic core width 1.2 (min), magnetic core thickness 0.5 (+m), H At width 46 (W), coil thickness x? (++m) e
The maximum length is 10 (m).

Although the present invention has been described in detail with reference to the illustrated embodiments, the present invention is not limited to what is illustrated, and the structure of the power generation section or the combination of gears of the drive mechanism, etc. may be changed as appropriate. I can do it. It is also applicable when the power generation unit is shared with an automatic power generation device that generates power using arm movements or gravity.

〔Effect of the invention〕

As explained above, in the present invention, the coil winding volume of the power generator for an electronic wristwatch is at least 1B(-), and the coil winding diameter d(1) and the coil winding volume "IQ (j)"
By setting the ratio V c / d to 450 to 800 and winding the fill, the power generation performance of the power generation device can be brought out to the maximum, and the electronic wristwatch can be activated by simply operating the external operation member for a single time. It can supply enough electrical energy to drive the In addition, because the conversion efficiency of the flow of magnetic flux in the coil to electricity is increased, sufficient power can be generated even if the number of magnetic fluxes passing through the coil is small, and the magnetic rotor, which is the most hated step motor for watches, can generate electricity. Disturbances in the magnetic field are reduced, ensuring reliability as a watch.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of an electronic wristwatch with a power generator. FIG. 2 is a charging circuit diagram used in the present invention. Fig. 3 is a diagram showing the relationship between the coil winding diameter and the generated current in the embodiment of the present invention. FIG. 4 is a relationship diagram showing the ratio between the coil winding volume and the coil winding wire diameter in the embodiment of the present invention. Figure tg5 is a diagram showing the relationship between the coil winding volume and the generated current in the embodiment of the present invention. 1... Clock movement 2... Liaise 7... Magnet rotor 8... Stator 9... Coil 20... Charging control circuit 21 ...Secondary power supply 22...More than the clock body, there are also doubts about the clock + Koze J Sen3shi (p 61% - lead mouth 1st figure, Tohoku f Toro 2nd figure Koru I confusion) 31 Figure 20 40 60 80 / DO Coil Emi Body Cry (hiring) Coil, 4 4 - Acceptance and Kuirui Bill 9 Season 4 Hill and R Obi table size + @ (E-m steaming figure 4

Claims (1)

[Claims] In a device that converts mechanical energy obtained by operating an external operating member into electrical energy through relative motion between a magnet rotor and a coil wound around a stator surrounding the magnet rotor, the winding volume of the coil is at least 1
8 (mm^3) or more, and the winding diameter d (m
m) and the winding volume of the coil V_c (mm^3)
An electronic wristwatch with a power generation device, characterized in that it has a relationship of 50≦V_c/d≦800.