JP2022125746A5

JP2022125746A5 -

Info

Publication number: JP2022125746A5
Application number: JP2021023509A
Authority: JP
Filing date: 2021-02-17
Publication date: 2023-09-29
Anticipated expiration: 2041-02-17

Description

コイル４３の第１端子Ｏ１及び第２端子Ｏ２に対しては、トランジスタＴＰ１及びＴＰ２がそれぞれ接続されている。トランジスタＴＰ１及びＴＰ２に対してはコイル４３に生じた逆起電圧が入力されて、それに基づいて回転検出回路４５が検出信号を検出する。すなわち、所定のタイミングでトランジスタＴＰ２をＯＮとすることで、それらトランジスタに対応する第１端子Ｏ１及び第２端子Ｏ２で発生する誘起電圧を電圧信号である検出信号として取り出すことができる。 Transistors TP1 and TP2 are connected to the first terminal O1 and second terminal O2 of the coil 43, respectively. The back electromotive force generated in the coil 43 is input to the transistors TP1 and TP2, and the rotation detection circuit 45 detects a detection signal based on it. That is, by turning on the transistor T P2 at a predetermined timing, the induced voltage generated at the first terminal O1 and the second terminal O2 corresponding to these transistors can be extracted as a detection signal that is a voltage signal.

Claims

A hairspring that elastically deforms to rotate the balance wheel forward and backward ;
a dual-poled permanent magnet that rotates in forward and reverse directions as the balance wheel rotates in forward and reverse directions;
a coil in which a back electromotive force is generated by the forward and reverse rotational movement of the permanent magnet ;
a first end provided along the outer periphery of the permanent magnet; and a second end provided along the outer periphery of the permanent magnet and opposed to the first end via the permanent magnet. a soft magnetic core forming a magnetic circuit together with the coil;
a control circuit that is driven by electric power generated based on the back electromotive voltage and performs rate adjustment based on the back electromotive voltage and a reference frequency of a reference signal source;
has
The permanent magnet is arranged such that the magnetization direction faces the first end or the second end when the hairspring is at its natural length .
Mechanical watch.

The permanent magnet is arranged so that the direction of magnetization is the same as the direction in which the first end and the second end face each other when the hairspring is at its natural length .
The mechanical timepiece according to claim 1.

The soft magnetic core includes a first separating portion that separates magnetic coupling between the first end and the second end, and a first separating portion that separates the magnetic coupling between the first end and the second end. the second separating part being separated and disposed opposite to the first separating part via the permanent magnet;
The permanent magnet is arranged such that the direction of magnetization is perpendicular to the direction in which the first separation part and the second separation part face each other when the hairspring is at its natural length .
The mechanical timepiece according to claim 1 or 2.

The soft magnetic core includes a first separating portion that separates magnetic coupling between the first end and the second end, and a first separating portion that separates the magnetic coupling between the first end and the second end. the second separating part being separated and disposed opposite to the first separating part via the permanent magnet;
The permanent magnet includes an N-pole portion and an S-pole portion, and when the hairspring is at its natural length , the boundary between the N-pole portion and the S-pole portion is the first separation portion and the second separation portion. It is arranged so as to overlap the band-shaped area connecting the
The mechanical timepiece according to claim 1 or 2.

The balance wheel is in a power supply position where the power necessary for forward and reverse rotational movement of the balance wheel is supplied from a power source when the hairspring is at its natural length .
A mechanical timepiece according to any one of claims 1 to 4.

The permanent magnet is arranged so that the back electromotive force detected while rotating 180 degrees in a forward direction or a reverse direction from the power supply position has the same polarity.
The mechanical timepiece according to claim 5.

a rotation detection circuit that detects a detection signal based on the back electromotive force ;
a frequency dividing circuit that outputs a reference signal based on the reference frequency;
a speed-governing pulse output circuit that outputs a speed-governing pulse for controlling forward and reverse rotational motion of the balance wheel;
has
The control circuit controls the regulating pulse output circuit based on the detection timing of the detection signal and the output timing of the reference signal.
A mechanical timepiece according to any one of claims 1 to 6.

The speed regulating pulse output circuit is
If the detection timing of the detection signal is earlier than the output timing of the reference signal, outputting the speed regulating pulse to either the first terminal or the second terminal of the coil;
If the detection timing of the detection signal is later than the output timing of the reference signal, outputting the speed regulating pulse to the other of the first terminal or the second terminal;
The mechanical timepiece according to claim 7.

The regulating pulse output circuit is configured to be able to output a plurality of regulating pulses having different output periods.
The mechanical timepiece according to claim 7 or 8.

The regulating pulse output circuit is configured to be able to output a plurality of regulating pulses having different duty ratios.
A mechanical timepiece according to any one of claims 7 to 9.

The regulating pulse output circuit outputs the regulating pulse according to the amount of deviation in the detection timing of the detection signal with respect to the output timing of the reference signal.
The mechanical timepiece according to claim 9 or 10.

comprising an accumulation section that accumulates the amount of deviation in the detection timing of the detection signal with respect to the output timing of the reference signal;
The regulating pulse output circuit outputs the regulating pulse according to the amount of deviation accumulated in the storage section.
The mechanical timepiece according to claim 11.

comprising a rectifier circuit that rectifies a current generated in the coil in response to the back electromotive voltage,
The rectifier circuit includes one diode,
The mechanical timepiece according to any one of claims 1 to 12 .

A pair of notches facing each other are formed in the first end and the second end to reduce the holding torque of the permanent magnet.
The mechanical timepiece according to any one of claims 1 to 13 .