Bridge for a balance wheel including a swing adjustment device.

Abstract

The present invention relates to a bridge (100) for a balance wheel configured to be fixed and positioned on a plate (200) by means of at least one fixing member. Said bridge (100) comprises a receiving opening (111) configured to receive a balance wheel and a board (110) configured to be moved so as to adjust the distance between said board (110) and said plate (200), a lever arm (120) being configured to move said board (110) and a foot (130) being configured to be in contact with said plate (200) so as to make a mechanical connection and to move said board (110).

Description

technical field

[0001] The present invention relates to a mechanical watch part equipped with a device for adjusting the slack of a rotating moving part, in particular the slack of a balance wheel. Technological background

[0002] It is known that the balance staff can be adjusted by adjusting the height of the balance bridge plate using adjusting screws. By screwing or unscrewing the adjusting screws in a substantially uniform manner, it is thus possible to vary the height of the balance bridge plate, that is to say, to vary the relative distance of this plate to the mainplate.

[0003] Another known variant consists of having a fixed screw, which can serve as a reference because once screwed in the watchmaker will no longer touch it, and an adjusting screw, which depending on the direction of screwing will raise or lower the balance bridge in the manner of a screw-nut or screw-nut system.

[0004] Thus, the watchmaker who adjusts the balance wheel's swing must act on the adjusting screw(s) by turning it or them successively and repeatedly until the board reaches a height defining a correct swing for the balance wheel.

[0005] However, this manual adjustment is often tedious for a heterogeneous result. Summary of the invention

[0006] The present invention proposes to solve all or part of the problem in the form of a bridge for a balance wheel, preferably a balance wheel, said bridge being configured to be fixed and positioned on a plate by means of at least one fixing member configured to apply a force, preferably a tension and / or a torque to said bridge; said bridge comprising a receiving opening configured to receive a balance wheel and at least: A board; said at least one board being configured to be moved so that the distance between said at least one board and said plate varies; A lever arm: said at least one lever arm being configured to move said at least one board when said force is applied to said at least one lever arm;and, One foot: said at least one foot being configured to be in contact with said plate so as to make a mechanical connection and to transmit said force applied to said at least one lever arm so as to move said at least one board.;

[0007] Thanks to this arrangement, it is possible to adjust the swing of the balance wheel precisely and automatically.

[0008] According to one embodiment, said bridge includes at least one support configured to be in contact with said plate; said at least one lever arm being disposed between said at least one support and said at least one foot.

[0009] Thanks to this arrangement, the said bridge is stabilized.

[0010] According to one embodiment, said at least one board being configured to be deformed so that the distance between said at least one board and said plate varies when said force is applied to said at least one lever arm.

[0011] Thanks to this arrangement, the deformation of said at least one board allows the distance between said at least one board and said plate to vary when said force is applied on said at least one lever arm.

[0012] According to one embodiment, said at least one lever arm being configured to be deformed when said force is applied to said at least one lever arm.

[0013] Thanks to this arrangement, the deformation of said at least one lever arm allows the distance between said at least one board and said plate to vary when said force is applied to said at least one lever arm

[0014] According to one embodiment, said mechanical connection is a point connection, a straight linear connection and / or a pivot connection.

[0015] Thanks to this arrangement, it is possible to adjust the swing of the pendulum by moving said at least one board.

[0016] According to one embodiment, said at least one lever arm includes at least one fixing opening configured to receive at least one fixing member so as to fix said bridge to said plate.

[0017] Thanks to this arrangement, it is possible to adjust the swing of the pendulum by moving said at least one board via said force is applied on said at least one lever arm.

[0018] According to one embodiment, said at least one board includes said receiving opening.

[0019] Thanks to this arrangement, it is possible to slide the balance shaft until it buckles.

[0020] According to one embodiment, said receiving opening includes a first center and / or said at least one fixing opening includes a second center.

[0021] Thanks to this arrangement, it is possible to determine the swing of the pendulum by determining the inclination of said at least one board.

[0022] According to one embodiment, said at least one foot is located between said first center and said second center.

[0023] Thanks to this arrangement, it is possible to adjust the swing of the pendulum by determining the inclination of said at least one board.

[0024] According to one embodiment, said mechanical linkage is aligned between or with said first center and said second center, preferably said mechanical linkage is aligned on an axis formed by said first center and said second center.

[0025] Thanks to this arrangement, it is possible to adjust the swing of the pendulum by determining the inclination of said at least one board.

[0026] According to one embodiment, said straight linear link and / or said pivot link forms or form an angle between 70° and 90°, in particular between 80° and 90° and preferably between 85° and 90° with respect to said axis formed by said first center and said second center.

[0027] Thanks to this arrangement, it is possible to adjust the swing of the pendulum by determining the inclination of said at least one board.

[0028] According to one embodiment, said at least one foot is closer to said at least one lever arm than to said at least one board.

[0029] Thanks to this arrangement, the lever arm is proportionate. Brief description of the figures

[0030] The invention will be described in more detail below with the aid of the accompanying drawings, given by way of non-limiting examples, in which: Figure 1A illustrates an example of implementation of the bridge according to a first embodiment; Figure 1B shows a cross-sectional view of the bridge of Figure 1A according to a first embodiment; Figure 2 presents a top view of the bridge according to a first embodiment; Figures 3A-3C show an example of implementation of the bridge according to a second embodiment. Detailed description of the invention

[0031] The present invention, shown in Figures 1A and 3A on a plate, allows for easy, automated adjustment of the balance wheel's swing using a balance wheel bridge 100, even if a balance wheel bridge 100 is fitted. Said balance wheel bridge 100 comprises a receiving opening 111, having a first center 115, for receiving one end of the balance wheel 210's axis at its first center 115, or at least in the vicinity of its first center 115. The other end of the balance wheel 210's axis rests in a housing provided for this purpose on a plate 200.

[0032] Indeed, said balancer 210 is located between said bridge 100 according to the invention and said plate 200, on which said bridge 100 is fixed and positioned by means of at least one fixing member 205 which may be in the form of a screw 205. Said at least one screw 205 is configured, or said at least one fixing member 205 is configured to apply a force, more precisely a tension and / or a torque to said bridge 100.

[0033] Said bridge100 includes at least one plank110, at least one lever arm120, at least one foot130 and / or at least one support140 according to the embodiments.

[0034] Indeed, according to a first embodiment illustrated in figures 1A-2, said bridge100 is through and can include a plank110, two lever arms120, and two feet130.

[0035] According to a second embodiment shown in Figures 3A-3C, said bridge 100 is suspended and may include a plank 110, a lever arm 120, a foot 130 and a support 140.

[0036] Said at least one board 110 is configured to be moved or, according to one embodiment, to be deformed so that the distance between said at least one board 110 and said plate 200 varies; more precisely, said at least one board 110 comprises a first surface 119, and it is this distance between the first surface 119 of said bridge 100 and said plate 200 that varies. As follows from the preceding paragraphs, it is said at least one board 110 that comprises said receiving opening 111, as particularly shown in Figures 1A, 2 and 3C, and when the distance between the first surface 119 of said bridge 100 and said plate 200 is optimal, said bridge 100 is buckled.

[0037] In the first embodiment, this variation is possible thanks to said at least one lever arm 120, which is configured to move said at least one board 110 when said force is applied on said at least one lever arm 120. Indeed, when the force or torque is applied on said at least one fastening member 205, i.e. said at least one screw 205, said at least one lever arm 120 is brought closer to said plate 200, and, by pivoting, by means of said at least one foot 130, said at least one board 110 is moved or even deformed elastically.

[0038] It is surely unnecessary to specify that, as can be observed in Figure 1A, said bridge according to the first embodiment is fixed at both ends. Therefore, when at least one of the two lever arms 120 is brought closer to said plate 200, said at least one board 110 is displaced or even deformed elastically because the other end is fixed via at least one fastening member 205 to said plate 200.

[0039] In the case of the second embodiment, this variation is possible thanks to the deformation of said at least one lever arm 120. Indeed, when said force is applied to said at least one lever arm 120, said at least one support 140, being in contact with said plate 200, causes said at least one lever arm 120 to deform elastically and thus displaces said at least one board 110. It is certainly important to specify that by displacement or variation of the distance between the first surface 119 of said bridge 100 and said plate 200, and this regardless of the embodiment, is achieved by an increase or decrease in the angle between the first surface 119 of said bridge 100 and said plate 200.

[0040] Furthermore, said at least one screw 205 is introduced into at least one fixing opening 121, comprising a second center 125, included in said at least one lever arm 120 and fixes said bridge 100 to said plate 200.

[0041] Furthermore, said at least one lever arm 120 is distant from said plate 200; more precisely, said at least one lever arm 120 comprises a second surface 129 which is opposite said plate 200. Said at least one foot 130, mentioned earlier in the description, comprises, for its part, a contact surface 139, that is to say, a surface which could be considered as being more or less the base 139 of said bridge 100.

[0042] Thus said at least one foot130 is configured or said contact surface139 is configured to be in contact with said plate200 so as to make a mechanical connection, which may take the form of a point connection, straight linear and / or pivot connection, and to transmit said force applied on said at least one lever arm120 so as to move said at least one board110.

[0043] As can be seen in Figure 1B, on the one hand, said at least one foot 130 is located between said first center 115 and said second center 125, preferably said at least one foot 130 is closer to said at least one lever arm 120 than to said at least one board 110, and on the other hand, the distance between said contact surface 139, i.e. the base 139 of said bridge 100 and said first surface 119, the first surface 119 of said bridge 100, is shorter than the distance between said contact surface 139 and said second surface 129. This can also be the case in the second embodiment.

[0044] Thus, said at least one lever arm 120 can act as a lever by means of said at least one foot 130, and said mechanical linkage is aligned between or with said first center 115 and said second center 125, preferably said mechanical linkage is aligned on an axis formed by said first center 115 and said second center 125. More precisely, said mechanical linkage, that is to say said straight linear linkage and / or pivot, forms or form an angle between 70° and 90°, in particular between 80° and 90° and preferably between 85° and 90° with respect to said axis formed by said first center 115 and said second center 125 so as to adjust the swing of the rocker arm by determining the inclination of said at least one board 110 by means of the inclination of said first center 115 and said second center 125.In other words, the inclination of said at least one board110 is determined by the elevation of said first center115 relative to said second center125.

[0045] Obviously, the first embodiment could be provided with said at least one support140 and the second embodiment could be deprived of said at least one support140 provided that it has at least one retaining element configured to maintain the distance between said plate200 and said second surface129 and to deform elastically in the manner of an elastomer.

Claims

1. Bridge (100) for a balance wheel (210), preferably a balance wheel (210), said bridge (100) being configured to be fixed and positioned on a plate (200) by means of at least one fastening member (205) configured to apply a force, preferably a tension and / or a torque to said bridge (100); said bridge (100) comprising a receiving opening (111) configured to receive a balance wheel (210) and at least: - A board (110); said at least one board (110) being configured to be moved so that the distance between said at least one board (110) and said plate (200) varies; - A lever arm (120): said at least one lever arm (120) being configured to move said at least one board (110) when said force is applied to said at least one lever arm (120);and, - A foot (130): said at least one foot (130) being configured to be in contact with said plate (200) so as to make a mechanical connection and to transmit said force applied on said at least one lever arm (120) so as to move said at least one board (110).; 2. Bridge (100) according to claim 1, which includes at least one support (140) configured to be in contact with said plate (200); said at least one lever arm (120) being disposed between said at least one support (140) and said at least one foot (130).

3. Bridge (100) according to claim 1 or 2, wherein said at least one board (110) is configured to be deformed so that the distance between said at least one board (110) and said plate (200) varies when said force is applied to said at least one lever arm (120).

4. Bridge (100) according to any one of the preceding claims, wherein said at least one lever arm (120) is configured to be deformed when said force is applied to said at least one lever arm (120).

5. Bridge (100) according to any one of the preceding claims, wherein said mechanical connection is a point connection, a straight linear connection and / or a pivot connection.

6. Bridge (100) according to any one of the preceding claims, wherein said at least one lever arm (120) comprises at least one fixing opening (121) configured to receive at least one fixing member (205) so as to fix said bridge (100) to said plate (200).

7. Bridge (100) according to any one of the preceding claims, wherein said at least one plank (110) comprises said receiving opening (111).

8. Bridge (100) according to any one of the preceding claims, wherein said receiving opening (111) comprises a first center (115) and / or said at least one fastening opening (121) comprises a second center (125).

9. Bridge (100) according to any one of the preceding claims, wherein said at least one foot (130) is included between said at least one plank (110) and said at least one lever arm (120).

10. Bridge (100) according to any one of the preceding claims, wherein said at least one foot (130) is included between said first center (115) and said second center (125).

11. Bridge (100) according to claim 2 or 7, wherein said mechanical linkage is aligned between or with said first center (115) and said second center (125), preferably said mechanical linkage is aligned on an axis formed by said first center (115) and said second center (125).

12. Bridge (100) according to claim 8, wherein said straight linear link and / or said pivot link forms or form an angle between 70° and 90°, in particular between 80° and 90° and preferably between 85° and 90° with respect to said axis formed by said first center (115) and said second center (125).