A movement reverse setting pin disengaging mechanism

Abstract

The present application discloses a reverse setting needle disengaging mechanism for a movement, which relates to the technical field of reverse setting needles of mechanical watch movements. It includes a stem shaft, a clutch wheel, a setting wheel, an intermediate wheel and a hour wheel. It is characterized in that: the clutch wheel is installed at the end of the stem shaft extending into the watch case, the setting wheel is located between the intermediate wheel and the clutch wheel, the clutch wheel is perpendicular to the setting wheel, one side of the setting wheel meshes with the teeth of the intermediate wheel, the other side of the setting wheel meshes with the straight teeth of the clutch wheel, the intermediate wheel is in transmission connection with the hour wheel, a rocker is installed on the setting wheel shaft, a strip-shaped displacement hole is provided on the rocker, a positioning pin is inserted into the displacement hole, the positioning pin is fixedly arranged, an elastic stop is arranged on the side of the setting wheel away from the positioning pin, and when the inner peripheral wall of the displacement hole near the setting wheel moves away from the positioning pin, the setting wheel abuts against the elastic stop. The present application has the effects of improving the working reliability of the forward setting needle of the movement and reducing the damage to the internal components of the movement during the reverse setting needle process.

Description

Technical Field

[0001] The present application relates to the field of reverse setting pin technology for mechanical watch movements, and particularly to a reverse setting pin disengaging mechanism for a movement. Background Art

[0002] Whether it is a mechanical watch or a quartz watch, there will be a setting pin structure for adjusting time or date. When the watch is running, the setting pin mechanism must drive the hands to accurately indicate the time. The setting pin is realized by the user rotating the stem component extending outside the watch case. In a mechanical watch, the winding transmission directly uses two cylindrical gears, a center wheel and a cannon pinion, to transmit motion between perpendicular intersecting axes; in the setting pin transmission, a cylindrical gear (setting pin wheel) and a face gear (clutch wheel) are used to transmit motion between perpendicular intersecting axes. The main requirements for these two transmissions are reliable operation and flexible transmission.

[0003] The degree of transmission flexibility depends on the mutual arrangement of the meshing gears. Generally, a new mechanical watch may feel slightly tight, while an old watch is often relatively loose. For watches with a date and day-of-week calendar, when the calendar jumps every day, the "load" on the movement increases. If the setting pin is loose, there is a greater possibility of the problem of "losing turns", manifested as the watch running slow or the hour and minute hands not moving at all. Therefore, in some movements, it is necessary to increase the meshing depth of the setting pin wheel and the clutch wheel to reduce the failure of the watch "not driving the hands". When overhauling or selecting and matching the components of the winding and setting pin mechanism, it is also necessary to focus on whether it affects the correct meshing between the gears.

[0004] In view of the above related technologies, the inventor found that in the movements of the related technologies, the setting pin wheel and the clutch wheel are deeply meshed, which will cause destructive effects on some components inside the movement during the reverse setting pin process, especially causing relatively large wear on the cross-wheel piece meshing with the setting pin wheel, etc. However, a watch is a precision micro-mechanical device. Even a small amount of wear will affect the service life of the watch. Therefore, from the perspective of mechanical watch maintenance, it is generally required that users minimize the number of times of setting the pin, especially to reduce reverse setting the pin and continuous setting the pin for a long time. Therefore, there are urgent improvements to be made in improving the working reliability of the forward setting pin of the movement and reducing the frictional loss of the reverse setting pin of the movement. Summary of the Invention

[0005] In order to improve the working reliability of the forward setting pin of the movement and reduce the frictional loss of the reverse setting pin of the movement, the present application provides a reverse setting pin disengaging mechanism for a movement.

[0006] The reverse setting pin disengaging mechanism for a movement provided by the present application adopts the following technical solutions:

[0007] A movement reverse setting hand disengaging mechanism includes a stem, a clutch wheel, a setting hand wheel, an intermediate wheel and a hour wheel. The clutch wheel is mounted at the end of the stem extending into the watch case. The setting hand wheel is located between the intermediate wheel and the clutch wheel. The clutch wheel is perpendicular to the setting hand wheel. One side of the setting hand wheel meshes with the teeth of the intermediate wheel, and the other side of the setting hand wheel meshes with the straight teeth of the clutch wheel. The intermediate wheel is in transmission connection with the hour wheel. A rocker is mounted on the setting hand wheel shaft. A strip-shaped displacement hole is formed in the rocker. A positioning pin is inserted through the displacement hole, and the positioning pin is fixedly arranged. An elastic stopper is arranged on the side of the setting hand wheel away from the positioning pin. When the inner peripheral wall of the displacement hole near the setting hand wheel moves away from the positioning pin, the setting hand wheel abuts against the elastic stopper.

[0008] By adopting the above technical solution, during the forward setting hand process of the movement, the stem rotates counterclockwise, driving the clutch wheel to rotate counterclockwise. The clutch wheel drives the setting hand wheel to rotate clockwise. The setting hand wheel drives the intermediate wheel to rotate counterclockwise, and the intermediate wheel drives the hour wheel to rotate clockwise. During the forward setting hand process, the straight teeth of the clutch wheel meshing with the setting hand wheel move downward, pressing down the setting hand wheel, and the setting hand wheel and the intermediate wheel are deeply meshed. The end of the inner peripheral wall of the displacement hole of the rocker near the setting hand wheel is in close contact with the positioning pin, which has the effect of improving the working reliability of the forward setting hand of the movement; during the reverse setting hand process of the movement, the stem rotates clockwise, driving the clutch wheel to rotate clockwise. The clutch wheel drives the setting hand wheel to rotate counterclockwise. The setting hand wheel drives the intermediate wheel to rotate clockwise, and the intermediate wheel drives the hour wheel to rotate counterclockwise. During the reverse setting hand process, the straight teeth of the clutch wheel meshing with the setting hand wheel move upward, driving the setting hand wheel to move upward, so that the setting hand wheel and the intermediate wheel are disengaged. The end of the inner peripheral wall of the displacement hole of the rocker near the setting hand wheel gradually moves away from the positioning pin, which has the effect of reducing the damage to the internal components of the movement during the reverse setting hand process; the elastic stopper can enable the setting hand wheel to quickly engage with the intermediate wheel during the forward setting hand process, reducing the occurrence of idling phenomenon, and providing space during the reverse setting hand process to ensure as much as possible that the setting hand wheel and the intermediate wheel are disengaged, making the design more comprehensive.

[0009] Optionally, the elastic stopper is a linear spring piece, and the setting hand wheel abuts against the side with a larger area of the elastic stopper.

[0010] By adopting the above technical solution, the elastic stopper is selected as a linear spring piece, so that the setting hand wheel abuts against the side wall with a larger area of the spring piece, which is convenient for the setting hand wheel to abut against and push the elastic stopper. The effect is that the floor area is smaller than that of a spiral spring, and it is sensitive and reliable.

[0011] Optionally, the elastic coefficient of the elastic stopper is greater than or equal to 1 N / mm and less than or equal to 6 N / mm.

[0012] By adopting the above technical solution, the elasticity of the elastic stopper should not be too large, which makes it difficult for the pointer wheel to push; nor should it be too small, which affects the stability of the device. The elastic coefficient of the elastic stopper is greater than or equal to 1 N / mm and less than or equal to 6 N / mm, making the design more reasonable.

[0013] Optionally, a limit retaining groove for restricting the swing amplitude of the elastic stopper is formed on the watch case.

[0014] By adopting the above technical solution, the swing amplitude of the elastic stopper is restricted by the limit retaining groove, further improving the stability of the device.

[0015] Optionally, an installation assembly is provided at the end of the elastic stopper away from the pointer wheel. The installation assembly includes two elastic cards spaced apart at the end of the elastic stopper away from the pointer wheel. An installation groove is formed on the watch case housing, and the elastic cards are installed in the installation groove through plug-in fit.

[0016] By adopting the above technical solution, an installation assembly is provided at the end of the elastic stopper away from the pointer wheel. The elastic cards are elastic, and the two elastic cards are spaced apart. The elastic cards are installed in the installation groove through plug-in fit, so that the elastic stopper can be detachably installed in the watch case, facilitating maintenance and replacement.

[0017] Optionally, an arc-shaped convex portion is provided on the side wall of the elastic card facing away from the other elastic card.

[0018] By adopting the above technical solution, an arc-shaped convex portion is provided on the side wall of the elastic card facing away from the other elastic card. On the one hand, the arc-shaped convex portion can guide the plugging process, and on the other hand, it also makes the plugging of the elastic card in the installation groove tighter.

[0019] Optionally, a reduction gear is provided on the intermediate wheel. The reduction gear rotates coaxially with the intermediate wheel, and the hour wheel meshes with the reduction gear for transmission.

[0020] By adopting the above technical solution, a reduction gear is provided on the intermediate wheel, so that the hour wheel meshes with the reduction gear for transmission, further improving the operating stability of the device.

[0021] Optionally, the rocker plate is in an E shape, the displacement hole is opened in the middle of the rocker plate, and the end of the rocker plate close to the pointer wheel is connected to the pointer wheel shaft.

[0022] By adopting the above technical solution, an E-shaped rocker plate is designed, the displacement hole is opened in the middle of the rocker plate, the end of the rocker plate close to the pointer wheel is connected to the pointer wheel shaft, and the other end of the rocker plate forms a cooperation with other components of the movement, making the design more efficient.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] During the forward hand setting process of the movement, the stem rotates counterclockwise, driving the clutch wheel to rotate counterclockwise. The clutch wheel drives the hand setting wheel to rotate clockwise, the hand setting wheel drives the intermediate wheel to rotate counterclockwise, and the intermediate wheel drives the hour wheel to rotate clockwise. During the forward hand setting process, the straight teeth of the clutch wheel meshing with the hand setting wheel move downward, pressing down the hand setting wheel, and the hand setting wheel and the intermediate wheel are deeply meshed. One end of the inner peripheral wall of the displacement hole of the rocker plate close to the hand setting wheel is in close contact with the positioning pin, which has the effect of improving the working reliability of the forward hand setting of the movement; during the reverse hand setting process of the movement, the stem rotates clockwise, driving the clutch wheel to rotate clockwise. The clutch wheel drives the hand setting wheel to rotate counterclockwise, the hand setting wheel drives the intermediate wheel to rotate clockwise, and the intermediate wheel drives the hour wheel to rotate counterclockwise. During the reverse hand setting process, the straight teeth of the clutch wheel meshing with the hand setting wheel move upward, driving the hand setting wheel to move upward, so that the hand setting wheel and the intermediate wheel are disengaged. One end of the inner peripheral wall of the displacement hole of the rocker plate close to the hand setting wheel gradually moves away from the positioning pin, which has the effect of reducing the damage to the internal components of the movement during the reverse hand setting process;

[0025] The elastic stopper can enable the hand setting wheel to quickly engage with the intermediate wheel during the forward hand setting process, reduce the occurrence of idling, and provide space during the reverse hand setting process to ensure that the hand setting wheel and the intermediate wheel are disengaged as much as possible, making the design more comprehensive;

[0026] By arranging the mounting assembly at one end of the elastic stopper away from the hand setting wheel, the elastic card has elasticity, and two elastic cards are arranged at intervals. The elastic cards are installed in the mounting groove through plug-in fit, so that the elastic stopper is detachably installed in the watch case, which is convenient for maintenance and replacement. Description of the Drawings

[0027] Figure 1 is the overall structural schematic diagram of the embodiment of the present application;

[0028] Figure 2 is the top view schematic diagram of the overall structure of the embodiment of the present application;

[0029] Figure 3 is the structural schematic diagram of the rocker plate in the embodiment of the present application;

[0030] Figure 4 is the structural schematic diagram of the elastic stopper in the embodiment of the present application.

[0031] Reference Numerals: 1, stem; 2, clutch wheel; 3, hand setting wheel; 4, intermediate wheel; 5, hour wheel; 6, rocker plate; 7, displacement hole; 8, positioning pin; 9, elastic stopper; 10, limiting groove; 11, mounting assembly; 12, elastic card; 13, mounting groove; 14, arc convex part; 15, reduction wheel; 16, mounting post. Detailed Embodiment

[0032] The following is combined with the attached Figures 1-4A further detailed description of the present application is provided.

[0033] An embodiment of the present application discloses a mechanism for disengaging the reverse hour hand of a movement.

[0034] Referring to Figure 1 and Figure 2 A mechanism for disengaging the reverse hour hand of a movement includes a stem 1, a clutch wheel 2, a setting wheel 3, an intermediate wheel 4, a hour wheel 5 and a rocker 6. The clutch wheel 2, the setting wheel 3, the intermediate wheel 4 and the hour wheel 5 are all located inside the watch case. Only one end of the stem 1 extends out of the watch case for the user to rotate. The clutch wheel 2 is fixedly installed at the end of the stem 1 extending into the watch case by insertion and rotates synchronously with the stem 1.

[0035] Referring to Figure 1 and Figure 3 The rocker 6 is in the shape of an "E". A displacement hole 7 is provided in the middle of the rocker 6. The displacement hole 7 is strip-shaped, and a positioning pin 8 is inserted through the displacement hole 7 and fixedly arranged. The setting wheel 3 is located between the intermediate wheel 4 and the clutch wheel 2. One end of the rocker 6 is integrally formed with a mounting post 16. The setting wheel 3 is rotatably installed on the mounting post 16 through a shaft kit. The mounting post 16 is the axle of the setting wheel 3, that is, the center of rotation of the setting wheel 3. The other end of the rocker 6 is integrally formed with a special-shaped hole for cooperation with other components of the movement. The clutch wheel 2 is perpendicular to the setting wheel 3. One side of the setting wheel 3 meshes with the teeth of the intermediate wheel 4, and the other side of the setting wheel 3 meshes with the straight teeth of the clutch wheel 2. A reduction wheel 15 is installed on the intermediate wheel 4 through a shaft kit. The reduction wheel 15 rotates coaxially with the intermediate wheel 4, and the hour wheel 5 meshes with the reduction wheel 15 for transmission.

[0036] When the stem 1 rotates counterclockwise, it drives the clutch wheel 2 to rotate counterclockwise. The clutch wheel 2 drives the setting wheel 3 to rotate clockwise. The setting wheel 3 drives the intermediate wheel 4 to rotate counterclockwise. The intermediate wheel 4 drives the hour wheel 5 to rotate clockwise, which is the normal hour hand setting process of the movement. When the stem 1 rotates clockwise, it drives the clutch wheel 2 to rotate clockwise. The clutch wheel 2 drives the setting wheel 3 to rotate counterclockwise. The setting wheel 3 drives the intermediate wheel 4 to rotate clockwise. The intermediate wheel 4 drives the hour wheel 5 to rotate counterclockwise, which is the reverse hour hand setting process of the movement. During the normal hour hand setting process, the straight teeth of the clutch wheel 2 meshing with the setting wheel 3 move downward, pressing down the setting wheel 3 to make the setting wheel 3 mesh deeply with the intermediate wheel 4. One end of the inner peripheral wall of the displacement hole 7 of the rocker 6 close to the setting wheel 3 is in close contact with the positioning pin 8, which has the effect of improving the working reliability of the normal hour hand setting of the movement. During the reverse hour hand setting process, the straight teeth of the clutch wheel 2 meshing with the setting wheel 3 move upward, driving the setting wheel 3 to move upward, so that the setting wheel 3 and the intermediate wheel 4 are disengaged. One end of the inner peripheral wall of the displacement hole 7 of the rocker 6 close to the setting wheel 3 gradually moves away from the positioning pin 8, which has the effect of reducing the damage to the internal components of the movement during the reverse hour hand setting process.

[0037] Further, referring to Figure 1 and Figure 4, an elastic stopper 9 is provided on the side of the setting wheel 3 away from the positioning pin 8. An installation component 11 is provided at one end of the elastic stopper 9 away from the setting wheel 3. The installation component 11 includes an elastic clamping piece and an installation groove 13. The installation groove 13 is integrally formed on the watch case housing. The elastic card 12 is located at one end of the elastic stopper 9 away from the setting wheel 3. There are two elastic cards 12 arranged at intervals. The elastic cards 12 are installed in the installation groove 13 through plug-in fit. An arc-shaped convex part 14 is provided on the side wall of the elastic card 12 facing away from the other elastic card 12. The arc-shaped convex part 14 can guide the plugging and unplugging process of the elastic card 12 and make the plugging of the elastic card 12 in the installation groove 13 tighter. The arc-shaped convex part 14 is also in the shape of a sheet. The elastic stopper 9, the elastic card 12, and the arc-shaped convex part 14 are integrally formed for industrial production. At the same time, a limit retaining groove 10 is integrally formed on the watch case. One end of the elastic stopper 9 close to the setting wheel 3 is located in the limit retaining groove 10, which can limit the swing amplitude of the elastic stopper 9.

[0038] When one end of the inner peripheral wall of the displacement hole 7 close to the setting wheel 3 is away from the positioning pin 8, the setting wheel 3 abuts against the elastic stopper 9. By using the elastic stopper 9, during the forward setting process, the setting wheel 3 can quickly engage with the intermediate wheel 4, reducing the occurrence of idling. And during the reverse setting process, space is provided to ensure that the setting wheel 3 is disengaged from the intermediate wheel 4 as much as possible, making the design more comprehensive.

[0039] Specifically, the elastic stopper 9 is a linear spring piece with a smaller floor area compared to a spiral spring. The elastic coefficient of the elastic stopper 9 is greater than or equal to 1 N / mm and less than or equal to 6 N / mm. When the setting wheel 3 is disengaged, the setting wheel 3 abuts against the side wall with a larger area of the spring piece, so that the setting wheel 3 can abut against and push the elastic stopper 9, making the design more reasonable.

[0040] The implementation principle of a reverse setting release mechanism for a movement in an embodiment of this application is as follows: During operation, when the movement is setting forward, the stem 1 rotates counterclockwise, driving the clutch wheel 2 to rotate counterclockwise. The clutch wheel 2 drives the setting wheel 3 to rotate clockwise, the setting wheel 3 drives the intermediate wheel 4 to rotate counterclockwise, and the intermediate wheel 4 drives the hour wheel 5 to rotate clockwise. During the forward setting process, the straight teeth of the clutch wheel 2 meshing with the setting wheel 3 move downward, pressing down the setting wheel 3, and the setting wheel 3 is deeply meshed with the intermediate wheel 4. One end of the inner peripheral wall of the displacement hole 7 of the swing plate 6 close to the setting wheel 3 is in close contact with the positioning pin 8, which has the effect of improving the working reliability of the forward setting of the movement. During the reverse setting process of the movement, the stem 1 rotates clockwise, driving the clutch wheel 2 to rotate clockwise. The clutch wheel 2 drives the setting wheel 3 to rotate counterclockwise, the setting wheel 3 drives the intermediate wheel 4 to rotate clockwise, and the intermediate wheel 4 drives the hour wheel 5 to rotate counterclockwise. During the reverse setting process, the straight teeth of the clutch wheel 2 meshing with the setting wheel 3 move upward, driving the setting wheel 3 to move upward, causing the setting wheel 3 and the intermediate wheel 4 to disengage. One end of the inner peripheral wall of the displacement hole 7 of the swing plate 6 close to the setting wheel 3 gradually moves away from the positioning pin 8, which has the effect of reducing the damage to the internal components of the movement during the reverse setting process. The elastic stop 9 can enable the setting wheel 3 to quickly engage with the intermediate wheel 4 during the forward setting process, reducing the occurrence of idling, and providing space during the reverse setting process to ensure as much as possible that the setting wheel 3 and the intermediate wheel 4 are disengaged, making the design more comprehensive.

[0041] The above are all preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A movement reverse hour hand disengaging mechanism, comprising a stem shaft (1), a clutch wheel (2), a hour hand setting wheel (3), an intermediate wheel (4) and a hour wheel (5), characterized in that: The clutch wheel (2) is installed at the end of the handle shaft (1) extending into the watch case. The hand setting wheel (3) is located between the intermediate wheel (4) and the clutch wheel (2). The clutch wheel (2) is perpendicular to the hand setting wheel (3). One side of the hand setting wheel (3) meshes with the teeth of the intermediate wheel (4), and the other side of the hand setting wheel (3) meshes with the straight teeth of the clutch wheel (2). The intermediate wheel (4) is in transmission connection with the hour wheel (5). A rocking plate (6) is installed on the shaft of the hand setting wheel (3). A strip-shaped displacement hole (7) is formed in the rocking plate (6). A positioning pin (8) is inserted through the displacement hole (7). The positioning pin (8) is fixedly arranged. An elastic stop (9) is arranged on the side of the hand setting wheel (3) away from the positioning pin (8). When the inner peripheral wall of the displacement hole (7) near the hand setting wheel (3) moves away from the positioning pin (8), the hand setting wheel (3) abuts against the elastic stop (9), and the straight teeth of the clutch wheel (2) meshing with the hand setting wheel (3) move downward, pressing down the hand setting wheel (3) to make the hand setting wheel (3) mesh deeply with the intermediate wheel (4). The inner peripheral wall of the displacement hole (7) of the rocking plate (6) near the hand setting wheel (3) is in close contact with the positioning pin (8), which has the effect of improving the working reliability of the positive hand setting of the movement. During the reverse hand setting process, the straight teeth of the clutch wheel (2) meshing with the hand setting wheel (3) move upward, driving the hand setting wheel (3) to move upward, so that the hand setting wheel (3) and the intermediate wheel (4) are disengaged, and the inner peripheral wall of the displacement hole (7) of the rocking plate (6) near the hand setting wheel (3) gradually moves away from the positioning pin (8).

2. The movement reverse hour hand disengaging mechanism according to claim 1, characterized in that: The elastic stop (9) is a linear spring piece, and the hand setting wheel (3) abuts against the side with a larger area of the elastic stop (9).

3. The movement reverse hour hand disengaging mechanism according to claim 2, characterized in that: The elastic coefficient of the elastic stop (9) is greater than or equal to 1 N / mm and less than or equal to 6 N / mm.

4. The movement reverse hour hand disengaging mechanism according to claim 1, characterized in that: A limit stop groove (10) for limiting the swing amplitude of the elastic stop (9) is formed on the watch case.

5. The movement reverse hour hand disengaging mechanism according to claim 1, characterized in that: An installation component (11) is arranged at the end of the elastic stop (9) away from the hand setting wheel (3). The installation component (11) includes two elastic cards (12) arranged at intervals at the end of the elastic stop (9) away from the hand setting wheel (3). An installation groove (13) is formed on the watch case housing. The elastic cards (12) are installed in the installation groove (13) by plug-in fit.

6. The movement reverse hour hand disengaging mechanism according to claim 5, characterized in that: An arc-shaped convex part (14) is arranged on the side wall of the elastic card (12) facing away from the other elastic card (12).

7. The movement reverse hour hand disengaging mechanism according to claim 1, characterized in that: A reduction gear (15) is arranged on the intermediate wheel (4). The reduction gear (15) rotates coaxially with the intermediate wheel (4). The hour wheel (5) is in meshing transmission with the reduction gear (15).

8. The movement reverse hour hand disengaging mechanism according to claim 1, characterized in that: The rocking plate (6) is in an E shape. The displacement hole (7) is formed in the middle of the rocking plate (6). The end of the rocking plate (6) near the hand setting wheel (3) is connected to the shaft of the hand setting wheel (3).

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