Self-adjustable horological oscillator
A horological movement ( 6 ) including: a plate ( 7 ); a mechanical resonator ( 8 ) including an oscillating balance ( 11 ) rotatably mounted relative to the plate ( 7 ), and a spiral spring ( 22 ) coupled to the balance ( 11 ); an electromagnetic regulator ( 29 ) coupled to the mechanical resonator ( 8 ) to regulate the frequency of the oscillations of the balance ( 11 ), and including at least one permanent magnet ( 30 ) fixedly mounted relative to the plate ( 7 ), at least one coil ( 31 ), a quartz or silicon resonator ( 32 ) and an electronic circuit ( 33 ) connected to the resonator ( 32 ) and to the coil ( 31 ), all mounted on the balance ( 11 ) while being completely included in an inner cavity ( 18 ) delimited by the latter.
1. A horological movement ( 6 ) comprising:
a plate ( 7 );
a mechanical resonator ( 8 ) comprising:
an oscillating balance ( 11 ) rotatably mounted relative to the plate ( 7 ) about an axis ( 12 ), this balance ( 11 ) having an upper face ( 16 ) and a lower face ( 17 ), and
a spiral spring ( 22 ) coupled to the balance ( 11 ), this spiral spring ( 22 ) having a first end ( 23 ) fixed relative to the plate ( 7 ) and a second end secured to the balance ( 11 );
an electromagnetic regulator ( 29 ) coupled to the mechanical resonator ( 8 ) to regulate the frequency of the balance ( 11 ) oscillations, the electromagnetic regulator ( 29 ) comprising:
at least one permanent magnet ( 30 ),
at least one coil ( 31 ),
a quartz or silicon resonator ( 32 ) and
an electronic circuit ( 33 ) connected to the resonator ( 32 ) and to the coil ( 31 ), wherein
the magnet ( 30 ) is fixedly mounted relative to the plate ( 7 ); and
the coil ( 31 ), the resonator ( 32 ) and the electronic circuit ( 33 ) are mounted on the balance ( 11 ) while being completely included in at least one inner cavity ( 18 ) delimited by the latter.
2. The movement ( 6 ) according to claim 1 , wherein the cavity ( 18 ) is blind on the side of at least one of the faces ( 16 , 17 ) of the balance ( 11 ).
3. The movement ( 6 ) according to claim 1 , wherein the balance ( 6 ) comprises a felloe ( 20 ) which defines a cavity ( 18 ) wherein the (or each) coil ( 31 ), the quartz resonator ( 32 ) and the electronic circuit ( 33 ) are housed.
4. The movement ( 6 ) according to claim 1 , wherein the regulator ( 29 ) comprises a pair of coils ( 31 ).
5. The movement ( 6 ) according to claim 4 , wherein the coils ( 31 ) are diametrically opposite.
6. The movement ( 6 ) according to claim 1 , wherein the electromagnetic regulator ( 29 ) comprises capacitors ( 36 ) coupled to the electronic circuit ( 33 ).
7. The movement ( 6 ) according to claim 1 , further comprising a cover ( 37 ) mounted on the balance ( 11 ) and which closes the cavity ( 18 ) defined by the felloe ( 20 ).
8. The movement ( 6 ) according to claim 1 , wherein the permanent magnet ( 30 ) is made of a neodymium-iron-boron alloy.
9. The movement ( 6 ) according to claim 8 , further comprising at least two magnets ( 30 ) opposite each other, namely an upper magnet ( 30 ) fixedly mounted relative to the plate ( 7 ) on the side of the upper face ( 16 ) of the balance ( 11 ), and a lower magnet ( 30 ) fixedly mounted relative to the plate ( 7 ) on the side of the lower face ( 17 ) of the balance ( 11 ).
10. The movement ( 6 ) according to claim 1 , wherein the electromagnetic regulator ( 29 ) comprises at least one pair of magnets ( 30 ) fixedly mounted relative to the plate ( 7 ) on the side of the upper face ( 16 ) of the balance ( 11 ).
11. The movement ( 6 ) according to claim 10 , further comprising at least two pairs of magnets ( 30 ), namely a first pair of upper magnets ( 30 ) fixedly mounted relative to the plate ( 7 ) on the side of the upper face ( 16 ) of the balance ( 11 ), and a pair of lower magnets ( 30 ) fixedly mounted relative to the plate ( 7 ) on the side of the lower face ( 17 ) of the balance ( 11 ).
12. A watch ( 1 ) equipped with a movement ( 6 ) according to claim 1 .