Date and day change mechanism for a timepiece

Abstract

The utility model discloses a kind of switching mechanism of date and week of clock, including main clamping plate, the hour wheel pipe is pivotally connected on main clamping plate, the hour wheel pipe is fixedly connected with hour wheel gear and driving gear, the hour wheel pipe is also sleeved with week gear, week gear can be rotated with the hour wheel pipe, rotatable calendar ring is installed on main clamping plate, multiple driving teeth are arranged at the inner periphery of calendar ring with interval, calendar ring is positioned by first positioning member;A week disc is fixedly connected with week gear and positioned by second positioning member;Switching gear is pivotally connected on main clamping plate, switching gear is engaged with driving gear, calendar driving claw and week driving claw with up and down positions mutually staggered are provided on switching gear, with the rotation of switching gear, calendar driving claw intermittently drives the driving tooth, so that calendar ring rotates and changes position, week driving claw intermittently drives the rotation of week gear, so that week disc rotates and changes position with follow-up.The utility model structure is simple, and the switching action of date and week is reliable.

Description

Technical Field

[0001] This utility model relates to the field of watch manufacturing technology, and in particular to a date and day-of-the-week switching mechanism for a watch. Background Technology

[0002] In the existing watchmaking technology field, such as wristwatch manufacturing, in order to achieve more functions, in addition to indicating the time, it is desirable to indicate the date, and some also need to indicate the date and day of the week at the same time. In order to achieve these functions, a calendar ring and a day-of-the-week disc need to be set on the watch, and the calendar ring or day-of-the-week disc needs to be rotated in time to switch the indicated positions of the calendar ring and day-of-the-week disc.

[0003] To achieve the functions of changing the date and week, a Chinese utility model patent with patent number ZL202320984609.1 and titled "A Calendar and Week Calendar Quick-Set Watch Movement" was published on July 7, 2023. It includes a main plate (1), a double calendar plate (2), a stem (11) mounted on the main plate (1), and a clutch wheel (12) mounted on the stem (11). The double calendar plate (2) is fixed to the upper side of the main plate (1). A calendar ring (21) and a week calendar disc (22) are rotatably mounted on the double calendar plate (2). The main plate (1) has... The calendar ring (21) is provided with a date-changing mechanism (3) for driving the calendar ring (21) to rotate and a week-changing mechanism (4) for driving the week-date disc (22) to rotate; the date-changing mechanism (3) includes a date-changing wheel (31), a date-changing pawl (32), and a date-changing component for transmitting power from the clutch wheel (12) to the date-changing wheel (31). The date-changing wheel (31) is rotatably mounted on the main clamping plate (1), and the date-changing pawl (32) is coaxially fixed to the upper side of the date-changing wheel (31); the inner wall of the calendar ring (21) is provided with an inwardly protruding date-changing protrusion (211). The date-changing protrusions (211) are arranged in multiple numbers corresponding to the largest month and are evenly distributed along the circumference of the calendar ring (21); the day-shifting claw (32) is provided with a day-shifting protrusion (321) on its periphery, and the day-shifting protrusion (321) engages with the date-changing protrusions (211); the week-changing mechanism (4) includes a week-shifting component and a week-shifting wheel (42) for driving the week calendar disc (22) to rotate, and the week-shifting wheel (42) is rotatably disposed at the center of the main clamping plate (1); the main clamping plate (1) is provided with a cross-wheel groove (41) corresponding to the position of the day-shifting wheel (31). 1) The rotating shaft of the day quickset wheel (31) is slidably inserted into the cross wheel groove (411) and moves closer to or further away from the week quickset wheel (42) along the cross wheel groove (411); the main plate (1) is provided with an elastic element that pushes the day quickset wheel (31) away from the week quickset wheel (42), and the week quickset component is located between the week quickset wheel (42) and the day quickset wheel (31); when the day quickset wheel (31) slides to the side closer to the week quickset wheel (42), the day quickset wheel (31) and the week quickset component transmit power to the week quickset wheel (42). This movement achieves date conversion by setting a date changing mechanism and day-of-week conversion by setting a week changing mechanism, but the structure is relatively complex and the reliability of the operation is reduced. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a date and day-of-the-week switching mechanism for a clock, which has a simple structure and reliable date and day-of-the-week switching action.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: a date and day-of-the-week switching mechanism for a clock, comprising a main plate, an hour wheel tube pivotally connected to the main plate, an hour wheel gear fixedly connected to the hour wheel tube, the hour wheel gear being driven to rotate through the clock's transmission system, a rotatable calendar ring mounted on the main plate, the calendar ring having multiple actuating teeth spaced apart around its inner periphery, a first positioning element mounted on the main plate, the first positioning element being positioned by elastic force in a groove between a pair of adjacent actuating teeth, a drive gear fixedly connected to the hour wheel tube, the central axis of the drive gear overlapping with the central axis of the hour wheel gear; a week-of-the-week gear sleeved on the hour wheel tube, the week-of-the-week gear being rotatable relative to the hour wheel tube, a second positioning element mounted on the main plate, a week-of-the-week disc sleeved on the hour wheel tube and fixedly connected to the week-of-the-week gear, the second positioning element being positioned by elastic force in a groove of the week-of-the-week gear;

[0006] A switching gear is pivotally connected to the main clamp plate. The switching gear meshes with the drive gear. The switching gear is equipped with a calendar pawl and a week calendar pawl. The calendar pawl and the week calendar pawl are staggered in their vertical positions. As the switching gear rotates, the calendar pawl intermittently drives the pawl to rotate, causing the calendar ring to rotate and change position. The week calendar pawl intermittently drives the week calendar gear to rotate, causing the week calendar disk to rotate and change position.

[0007] In a further improvement, the switching gear is a cylindrical gear, the calendar actuating claw extends upward from the end face of the switching gear and is elastic, a protrusion extends upward from the middle of the end face of the switching gear, and the week calendar actuating claw extends outward from the outer surface of the protrusion. For ease of manufacturing, the switching gear is further preferably formed by plastic injection molding.

[0008] In a further improvement, the weekly calendar gear is a cylindrical gear with 14 teeth, and the upper surface of the weekly calendar disk is marked with bilingual Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, and Sunday at equal intervals. The weekly calendar pawl drives the weekly calendar gear to rotate two tooth positions in one rotation.

[0009] In a further improvement, the end face of the calendar gear is provided with multiple connecting posts, and the calendar disk is provided with multiple connecting holes. Each connecting hole is tightly fitted with one of the connecting posts, so that the calendar disk is fixedly connected to the calendar gear, thus facilitating installation.

[0010] Preferably, the hour wheel tube is integrated with the hour wheel gear and the drive gear. More preferably, the hour wheel tube, hour wheel gear, and drive gear are formed by plastic injection molding.

[0011] In a further improvement, one end of the first positioning member is pivotally connected to the main clamping plate, and the other end of the first positioning member is engaged in the groove between a pair of adjacent actuating teeth. A portion of an elastic member is engaged in the slot of the main clamping plate, and the other portion of the elastic member abuts against one side of the other end of the first positioning member to drive the other end of the first positioning member to engage in the groove between a pair of adjacent actuating teeth.

[0012] In a further improvement, a limiting plate is fixedly connected to the main clamping plate. Viewed from top to bottom, the limiting plate overlaps with the calendar ring, and the limiting plate prevents the calendar ring from detaching from the main clamping plate. The second positioning component includes a long strip and a positioning part. The long strip is elastic, with one end connected to the positioning part and the other end connected to the inner side of the limiting plate. The positioning part is positioned on the weekday gear groove by the elastic force generated by the long strip.

[0013] Preferably, the distance between the central axis of the switching gear and the central axis of the hour wheel tube is 3.9mm-4.1mm.

[0014] In a further improvement, the drive gear is positioned above the hour wheel gear, the periodic gear is positioned above the drive gear, and the outer circumferential surface of the hour wheel tube is provided with multiple limiting protrusions. A limiting retaining ring is also inserted between the hour wheel tube and the periodic gear, and the limiting retaining ring restricts the periodic gear from disengaging from the hour wheel tube.

[0015] Furthermore, the upper end face of the drive gear is provided with multiple upwardly extending support protrusions, and the lower end face of the cyclic gear abuts against the multiple support protrusions.

[0016] This invention features a switching gear pivotally connected to the main plate, a drive gear fixed to the hour wheel tube, and the switching gear meshing with the drive gear. Simultaneously, a weekday gear is fitted onto the hour wheel tube, allowing it to rotate relative to the hour wheel tube. A weekday disc is fitted onto the hour wheel tube and fixed to the weekday gear. A rotatable calendar ring is mounted on the main plate, with multiple actuating teeth spaced around its inner perimeter. The switching gear has calendar actuating pawls and weekday actuating pawls, their vertical positions staggered. As the switching gear rotates, the calendar actuating pawls intermittently drive the actuating teeth, causing the calendar ring to rotate and change position, while the weekday actuating pawls intermittently drive the weekday gear, causing the weekday disc to rotate and change position. Thus, changing the day and week can be achieved with a single switching gear, eliminating the need for separate day and week changing mechanisms. The overall structure is simple, facilitating the arrangement of watch components, and the date and week changing actions are reliable. Attached Figure Description

[0017] Figure 1 This is a top-view perspective view of the present invention;

[0018] Figure 2 This is a top-view perspective view of the hidden weekly calendar of this utility model;

[0019] Figure 3 Is Figure 2 A top-down 3D view showing the concealed limiting plate on top of the existing structure;

[0020] Figure 4 This is a top view of the present invention;

[0021] Figure 5 yes Figure 4 AA section view;

[0022] Figure 6 It is a three-dimensional diagram showing the hour wheel tube, hour wheel gear, and drive gear integrated into one unit;

[0023] Figure 7 It is a 3D diagram of the switching gears;

[0024] Figure 8 This is a perspective view of the meshing of the switching gear and the drive gear, and the meshing of the hour wheel gear and the cross wheel of the watch transmission system. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] Figures 1 to 8 As shown, a clock's date and day-of-the-week switching mechanism includes a main plate 1, an hour wheel tube 2 pivotally connected to the main plate 1, an hour wheel gear 21 fixedly connected to the hour wheel tube 2, and the hour wheel gear 21 being driven to rotate through the clock's transmission system 3. The hour wheel gear 21 meshes with the small gear 31 of the transmission system 3, and the large gear 32 of the transmission system 3 meshes with the gear of the transmission system 3. The rotation of the transmission system 3 drives the hour wheel gear 21 to rotate.

[0027] A rotatable calendar ring 4 is mounted on the main clamping plate 1. The calendar ring 4 has multiple actuating teeth 41 spaced apart around its inner periphery. A first positioning member 42 is mounted on the main clamping plate 1. The first positioning member 42 positions the calendar ring 4 by engaging a groove 43 between a pair of adjacent actuating teeth 41 through elastic force. Specifically, one end of the first positioning member 42 is pivotally connected to the main clamping plate 1, and the other end of the first positioning member 42 engages the groove 43 between a pair of adjacent actuating teeth 41. A portion of an elastic member 44 is engaged in a slot on the main clamping plate 1, and the other portion of the elastic member 44 abuts against one side of the other end of the first positioning member 42 to drive the other end of the first positioning member 42 to engage the groove 43 between a pair of adjacent actuating teeth 41.

[0028] A drive gear 5 is also fixedly connected to the hour wheel tube 2, and the central axis of the drive gear 5 overlaps with the central axis of the hour wheel gear 21; a periodic gear 6 is sleeved on the hour wheel tube 2, and the periodic gear 6 can rotate relative to the hour wheel tube 2; combined with Figure 6 , Figure 8As further shown, the hour wheel tube 2 is integrated with the hour wheel gear 21 and the drive gear 5. The drive gear 5 is located above the hour wheel gear 21, and the periodic gear 6 is located above the drive gear 5. The outer circumferential surface of the hour wheel tube 2 is provided with multiple limiting protrusions 22. The hour wheel tube 2 is also fitted with a limiting ring 23 between the multiple limiting protrusions 22 and the periodic gear 6. The limiting ring 23 restricts the periodic gear 6 from disengaging from the hour wheel tube 2.

[0029] The upper end face of the drive gear 5 is also provided with a plurality of upwardly extending support protrusions 51, and the lower end face of the cyclic gear 6 abuts against the plurality of support protrusions 51. This can avoid the large contact area between the cyclic gear 6 and the drive gear 5, which would generate a large frictional force and drive the gear 6, or cause a large resistance to the transmission system. It can also ensure that the cyclic gear 6 can rotate relative to the hour wheel tube 2.

[0030] The main clamping plate 1 is equipped with a second positioning component 7. The weekly calendar disc 8 is fitted on the hour wheel tube 2 and fixedly connected to the weekly calendar gear 6. The weekly calendar disc 8 is located on the calendar ring 4. The second positioning component 7 is positioned by locking onto the tooth groove of the weekly calendar gear 6 through the elastic force.

[0031] A limiting plate 71 is fixedly connected to the main clamping plate 1. Viewed from top to bottom, the limiting plate 71 partially overlaps with the calendar ring 4. The limiting plate 71 restricts the calendar ring 4 from detaching from the main clamping plate 1. The second positioning member 7 includes a long strip 72 and a positioning part 73. The long strip 72 is elastic. One end of the long strip 72 is connected to the positioning part 73, and the other end is connected to the inner side of the limiting plate 71. The positioning part 73 is positioned on the weekday gear 6 tooth groove by the elastic force generated by the long strip 72. The long strip 72, the positioning part 73 and the limiting plate 71 are integrated into one unit.

[0032] A switching gear 9 is pivotally connected to the main clamping plate 1. The switching gear 9 meshes with the drive gear 5. The switching gear 9 is equipped with a calendar pawl 91 and a week calendar pawl 92. The calendar pawl 91 and the week calendar pawl 92 are staggered in their vertical positions. As the switching gear 9 rotates, the calendar pawl 91 intermittently drives the pawl 41 to rotate and change the position of the calendar ring 4. The week calendar pawl 92 intermittently drives the week calendar gear 6 to rotate and change the position of the week calendar disk 8.

[0033] The switching gear 9 is a cylindrical gear, and the calendar actuating claw 91 extends upward from the end face of the switching gear 9. The calendar actuating claw 91 is elastic. A protruding post 93 extends upward from the middle of the end face of the switching gear 9, and the week calendar actuating claw 92 extends outward from the outer surface of the protruding post 93. The switching gear 9 is formed by plastic injection molding.

[0034] The calendar gear 6 is a cylindrical gear with 14 teeth. The upper surface of the calendar disk 8 is evenly marked with the dates Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, and Sunday in both Chinese and English. The calendar actuating pawl 92 drives the calendar gear 6 to rotate two tooth positions with each rotation. This is to accommodate the needs of both languages.

[0035] The end face of the calendar gear 6 is provided with three connecting posts 61, and the calendar disk 8 is provided with three connecting holes. Each connecting hole is tightly fitted with one of the connecting posts 61 so that the calendar disk 8 is fixedly connected to the calendar gear 6.

[0036] Preferably, the distance between the central axis of the switching gear 9 and the central axis of the hour wheel tube 2 is 3.9mm-4.1mm. More preferably, it is 4mm.

[0037] In this embodiment, the clock's transmission system 3 drives the hour wheel gear 21 to rotate, and the drive gear 5 and hour wheel tube 2 follow the rotation of the hour wheel gear 21. The drive gear 5 drives the switching gear 9 to rotate. When the hour wheel tube 2 drives the hour hand to point to zero, the calendar pawl 91 rotates with the switching gear 9 and drives one of the shifting teeth 41 on the calendar ring 4, causing the calendar ring 4 to rotate and change position to skip a date. Then the switching gear 9 continues to rotate, and the week calendar pawl 92 drives the week calendar gear 6 to rotate and causes the week calendar gear 6 to rotate two tooth positions, changing the day of the week on the week calendar dial 8.

[0038] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A date and day-of-the-week switching mechanism for a clock, comprising a main plate, an hour wheel tube pivotally connected to the main plate, an hour wheel gear fixedly connected to the hour wheel tube, the hour wheel gear being driven to rotate via the clock's transmission system, a rotatable calendar ring mounted on the main plate, a plurality of actuating teeth spaced apart on the inner periphery of the calendar ring, and a first positioning member mounted on the main plate, the first positioning member being engaged in a groove between a pair of adjacent actuating teeth by elastic force to position the calendar ring, characterized in that: A drive gear is also fixedly connected to the hour wheel tube, and the central axis of the drive gear overlaps with the central axis of the hour wheel gear. A calendar gear is sleeved on the hour wheel tube, and the calendar gear can rotate relative to the hour wheel tube. A second positioning component is installed on the main clamping plate. A calendar disc is sleeved on the hour wheel tube and fixedly connected to the calendar gear. The second positioning component is positioned by locking onto the tooth groove of the calendar gear through elastic force. A switching gear is pivotally connected to the main clamp plate. The switching gear meshes with the drive gear. The switching gear is equipped with a calendar pawl and a week calendar pawl. The calendar pawl and the week calendar pawl are staggered in their vertical positions. As the switching gear rotates, the calendar pawl intermittently drives the pawl to rotate, causing the calendar ring to rotate and change position. The week calendar pawl intermittently drives the week calendar gear to rotate, causing the week calendar disk to rotate and change position.

2. The date and day-of-the-week switching mechanism of a clock according to claim 1, characterized in that: The switching gear is a cylindrical gear, the calendar actuating claw is formed by extending upward from the end face of the switching gear and is elastic, a protruding post extends upward from the middle of the end face of the switching gear, and the week calendar actuating claw is formed by extending outward from the outer surface of the protruding post.

3. The date and day-of-the-week switching mechanism of a clock according to claim 1, characterized in that: The weekly calendar gear is a cylindrical gear with 14 teeth. The upper surface of the weekly calendar disk is marked with bilingual Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, and Sunday at equal intervals. The weekly calendar pawl drives the weekly calendar gear to rotate two tooth positions in one rotation.

4. The date and day-of-the-week switching mechanism of a clock according to claim 1, characterized in that: The end face of the calendar gear is provided with multiple connecting posts, and the calendar disk is provided with multiple connecting holes. Each connecting hole is tightly fitted with one of the connecting posts so that the calendar disk is fixedly connected to the calendar gear.

5. The date and day-of-the-week switching mechanism of a clock according to claim 1, characterized in that: The hour wheel tube is integrated with the hour wheel gear and the drive gear.

6. The date and day-of-the-week switching mechanism of a clock according to claim 1, characterized in that: One end of the first positioning member is pivotally connected to the main clamping plate, and the other end of the first positioning member is engaged in the groove between a pair of adjacent actuating teeth. A portion of an elastic member is engaged in the slot of the main clamping plate, and the other portion of the elastic member abuts against one side of the other end of the first positioning member to drive the other end of the first positioning member to engage in the groove between a pair of adjacent actuating teeth.

7. The date and day-of-the-week switching mechanism of a clock according to claim 1, characterized in that: A limiting plate is fixedly connected to the main clamping plate. Viewed from top to bottom, the limiting plate overlaps with the calendar ring, and the limiting plate restricts the calendar ring from detaching from the main clamping plate. The second positioning component includes a long strip and a positioning part. The long strip is elastic. One end of the long strip is connected to the positioning part and the other end is connected to the inner side of the limiting plate. The positioning part is positioned on the weekday gear groove by the elastic force generated by the long strip.

8. The date and day-of-the-week switching mechanism of a clock according to claim 1, characterized in that: The distance between the central axis of the switching gear and the central axis of the hour wheel tube is 3.9mm-4.1mm.

9. A date and day-of-the-week switching mechanism for a clock according to any one of claims 1 to 8, characterized in that: The drive gear is located above the hour wheel gear, and the periodic gear is located above the drive gear. The outer circumferential surface of the hour wheel tube is provided with multiple limiting protrusions. A limiting retaining ring is also inserted between the hour wheel tube and the periodic gear, and the limiting retaining ring restricts the periodic gear from disengaging from the hour wheel tube.

10. The date and day-of-the-week switching mechanism of a clock according to claim 9, characterized in that: The upper end face of the drive gear is also provided with multiple upwardly extending support protrusions, and the lower end face of the cyclic gear abuts against the multiple support protrusions.

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