Date wheel mechanism for perpetual calendar mechanical clock and perpetual calendar mechanical transmission device

Abstract

The present invention provides a date wheel mechanism and a perpetual calendar mechanical transmission device for a perpetual calendar mechanical clock, wherein the date wheel mechanism comprises: a date wheel, which is provided with a plurality of date wheel teeth, including an output wheel tooth with a relatively long tooth full height; a command cam, which is arranged on one side of the date wheel, the command cam is provided with a fan ring groove, and the command cam and the date wheel have a common rotation axis; a driving member capable of being inserted into the fan ring groove is arranged on the date wheel; an arc-shaped guide surface is arranged on the other side of the date wheel, the arc-shaped guide surface can be used to abut against a heavy hammer in the perpetual calendar mechanical clock, the arc-shaped guide surface has a relatively high point and a relatively low point, the distance from the relatively high point to the rotation axis is greater than the distance from the relatively low point to the rotation axis, one side of the relatively high point is connected to the relatively low point by a steep drop surface, located on the other side of the relatively high point, and the arc-shaped guide surface is arranged starting from the relatively high point. The present invention has the advantages of fast date correction and convenient and reliable use.

Description

Technical Field

[0001] The invention relates to the field of watch manufacturing, and in particular to a date wheel mechanism and a perpetual calendar mechanical transmission device for a perpetual calendar mechanical clock. Background Art

[0002] The perpetual calendar mechanism can automatically identify the leap year and the big and small months in each year, automatically distinguish the specific days of each month and accurately correct the last day of each month to the first day of the next month, for example, the 30th day of April in a small month is automatically corrected to the first day of May, and in February of a leap year, the correction of adding 29 days of the month is performed; the common pointer-type display perpetual calendar structure on the market realizes the date change from the end of the month to the beginning of the month by pushing the date wheel to rotate with a push rod, and this change process is very slow. In particular, it often takes 4 to 6 hours for February to change to March. During this period, the watch cannot perform any time and date adjustment operations, which affects the accuracy of the clock timing. Therefore, it is necessary to propose improvements to the prior art. To this end, the present invention is developed under such a background. Summary of the invention

[0003] The purpose of the present invention is to solve the problems existing in the prior art. On the one hand, a date wheel mechanism of a perpetual calendar mechanical clock is proposed, and on the other hand, a perpetual calendar mechanical transmission device is proposed.

[0004] In order to solve the above-mentioned problem, on the one hand, the technical solution adopted by the present invention is:

[0005] A date wheel mechanism for a perpetual calendar mechanical clock, characterized in that it includes: a date wheel that can be driven by a power device and is provided with a plurality of date wheel teeth, wherein the plurality of date wheel teeth include an output wheel tooth with a relatively long tooth full height; a command cam that is arranged on one side of the date wheel, the command cam being provided with a fan ring groove, and the command cam and the date wheel having a common rotation axis; a driving member that can be inserted into the fan ring groove is provided on the date wheel, and when the date wheel rotates around the rotation axis, the command cam can be driven to rotate by the driving member; the command cam can swing relative to the rotation axis within a stroke defined by the fan ring groove; an arc-shaped guide surface is provided on the other side of the date wheel, and the arc-shaped guide surface is arranged around the rotation axis, and the arc-shaped guide surface is arranged around the rotation axis. The guide surface can be used to abut against the weight in the perpetual calendar mechanical clock; the arc-shaped guide surface has a relatively high point and a relatively low point with the distance to the rotation axis as a reference, one side of the relative high point is connected to the relative low point through a steep drop surface, and the arc-shaped guide surface is set on the other side of the relative high point starting from the relative high point, when the weight passes over the relative high point and slides down to the relative low point through the steep drop surface, it can hit the date wheel to make it rotate through three preset angles, and the three angles correspond to the 29th, 30th and 31st; the date pointer can rotate with the date wheel, and when the date wheel is driven, it can drive the date pointer to indicate the current day N, where N is any natural number from 1 to 31.

[0006] Preferably, the swing angle of the command cam's swing stroke defined by the fan ring groove relative to the rotation axis is equal to the rotation angle of the date wheel when the date hand passes three days.

[0007] Preferably, the number of the date wheel teeth on the date wheel is 31, and each time the date wheel rotates one tooth, the date pointer correspondingly rotates to the next day.

[0008] Preferably, a rotating shaft is fixedly provided on the date wheel, the rotation axis is the axis of the rotating shaft, the command cam is movably pivoted to the rotating shaft; and the date pointer is fixedly connected to the rotating shaft.

[0009] Preferably, a fan-shaped wheel is provided on one side of the date wheel, the fan-shaped wheel forms a fan-shaped ring notch, the arc-shaped guide surface includes an arc surface of the fan-shaped wheel and an arc surface corresponding to the fan-shaped ring notch, and the steep drop surface is a hammering surface having one end connected to the arc surface of the fan-shaped wheel and the other end connected to the arc surface corresponding to the fan-shaped ring notch.

[0010] Preferably, the rotation axis of the date wheel is located within the hammering surface.

[0011] Preferably, a snail wheel is provided on one side of the date wheel, and the arc-shaped guide surface is provided on the outer circumferential surface of the snail wheel.

[0012] The present invention provides a date wheel mechanism for a perpetual calendar mechanical clock. When the first day of the next month is about to enter, the heavy hammer passes over a relatively high point on the date wheel and slides down to a relatively low point through a steep drop surface. In this process, due to the striking effect of the heavy hammer on the steep drop surface, the date wheel can instantly rotate through three preset angles, and the three angles correspond to the 29th, 30th and 31st. For example, at midnight close to 0:00 on February 28th of a normal year, the heavy hammer hits the date wheel to skip the 29th, 30th and 31st, and March 1st can be entered instantly; at midnight close to 0:00 on February 29th of a leap year, the heavy hammer hits the date wheel to skip the 30th and 31st, and March 1st can be entered instantly; for example, at midnight close to 0:00 on the 30th of a short month, the heavy hammer hits the date wheel to skip the 31st, and the first day of the next month can be entered instantly. Therefore, compared with the prior art, the present invention has more accurate travel time and better user experience.

[0013] On the other hand, in order to cooperate with the aforementioned date wheel mechanism, the present invention also provides a perpetual calendar mechanical transmission device for a mechanical clock, and the scheme adopted is as follows:

[0014] A perpetual calendar mechanical transmission device for a mechanical clock, characterized in that it comprises: the date wheel mechanism according to any one of claims 1 to 7, and further comprising: a first command wheel, which can be driven by the output gear teeth on the date wheel through the gear teeth arranged thereon, and the first command wheel needs to be driven continuously forty-eight times by the date wheel for one rotation; a second command wheel, which can be driven by the date wheel through the gear teeth arranged thereon, and the second command wheel needs to be driven continuously twenty-four times by the date wheel for one rotation; the rotation axes of the date wheel, the first command wheel and the second command wheel are arranged parallel to each other; a circular first command disk is coaxially arranged on one side of the first command wheel, and the first command disk is provided with three notches, each The angle formed by the width of the notch relative to the axis of the first command disk is equivalent to the central angle formed by the two gear teeth on the first command wheel relative to the axis of the first command disk; the angle between the first notch and the second notch, and between the second notch and the third notch is 90 degrees; a leap year indicator hand that can rotate synchronously with the first command wheel is provided on the other side of the first command wheel; a second command disk is provided on the side of the second command wheel corresponding to the first command disk, and the second command disk is provided with tooth tops and tooth grooves corresponding to 24 months in two consecutive years according to the solar calendar calculation method; there are 10 tooth grooves in total, including two corresponding to February deep tooth groove parts, and eight shallow tooth groove parts corresponding to April, June, September and November; there are 14 tooth tops in total, corresponding to January, March, May, July, August, October and December, wherein the tooth tops corresponding to December and January are connected to each other, and the tooth tops corresponding to July and August are connected to each other; a command lever, which is provided with a semicircular main body, one end of which is provided with a first push claw and a second push claw, the length of the second push claw is greater than that of the first push claw, and the command lever is provided with a hinge axis; the first push claw is used to abut and cooperate with the circumferential surface of the second command disk and the notch on the second command disk; the second push claw is used to abut and cooperate with the tooth top on the first command disk and the tooth groove part abuts and cooperates; a limit part is provided on the command lever, and the limit part is used to limit the swing stroke of the command lever around its hinge axis; a command lever driving spring is used to drive the command lever to swing around its hinge axis; a heavy hammer is hinged on the command lever and can swing with the command lever; the heavy hammer is provided with a hammering part for cooperating with the command cam; a heavy hammer driving spring is arranged on the command lever, and is used to drive the heavy hammer to swing around its hinge axis to provide a driving force for hammering the steep drop surface; the month wheel is meshed with the first command wheel, and when the first command wheel drives the month wheel to rotate once, the month pointer connected to the month wheel rotates from the current indicated month to the next month.

[0015] Preferably, a cam driving portion is provided on the command lever at an inner side of the main body, and the cam driving portion is used to cooperate with the command cam, and can lift or release the command lever when the command cam rotates.

[0016] Preferably, the cam driving portion includes a straight strip-shaped rib disposed on the inner side of the main body, and the straight strip-shaped rib is substantially parallel to the opening of the main body.

[0017] Preferably, the limiting portion includes a slot provided on the command lever, and a limiting pin matched with the slot, and when the command lever swings, the slot moves away from or approaches the limiting pin.

[0018] Preferably, the slot is close to the hinge axis of the heavy hammer and is located outside the main body of the command lever.

[0019] Preferably, the weight is provided with a pointed portion protruding outwards.

[0020] Preferably, the date wheel, the first command wheel and the second command wheel are arranged in a triangle.

[0021] Preferably, on February 28th of a common year, the first push pawl extends to the bottom of the deep tooth groove portion, and the second push pawl extends to the bottom of the notch on the first command wheel; on February 28th of a leap year, the end of the second push pawl abuts against the circumferential surface of the first command disk, and the first push pawl is suspended in the deep tooth groove portion; on the 31st of a certain month, the end of the first push pawl abuts against the corresponding top of the tooth, and a gap exists between the end of the second push pawl and the circumferential surface of the first command disk; on the 30th of a certain month, the end of the first push pawl abuts against the bottom of the corresponding shallow tooth groove portion, and a gap exists between the end of the second push pawl and the circumferential surface of the first command disk.

[0022] Preferably, the date wheel is driven by the movement of the mechanical clock.

[0023] Preferably, the limit pin is fixed on the movement of the mechanical clock.

[0024] Preferably, the hinge shaft of the weight is fixed to the movement of the mechanical clock, and one end of the weight driving spring is connected to the hinge shaft of the command lever.

[0025] Preferably, the command lever driving spring is fixed to the movement of the mechanical clock via a connecting shaft.

[0026] Preferably, the date wheel, the first command wheel, the second command wheel, the command lever and the weight are all made of metal.

[0027] The present invention provides a perpetual calendar mechanical transmission device. With the cooperation of a date wheel, a first command wheel, a second command wheel, a command lever and a weight, the perpetual calendar mechanical clock can automatically identify common years and leap years and long and short months in each year, automatically distinguish the specific days of each month and accurately correct the last day of each month to the first day of the next month. Moreover, as mentioned above, through the cooperation of the weight and the date wheel and the setting of a preset rotation angle, the perpetual calendar mechanical clock can accurately realize date correction in an instant, thereby greatly improving the timing accuracy of the mechanical clock and making the user experience better and more assured. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention is further described below in conjunction with the accompanying drawings.

[0029] Figure 1 This is a schematic diagram of the three-dimensional structure of the date wheel viewed from one direction.

[0030] Figure 2 This is a schematic diagram of the three-dimensional structure of the date wheel viewed from another direction.

[0031] Figure 3 It is a schematic diagram of the three-dimensional structure of the first command wheel.

[0032] Figure 4 It is a schematic diagram of the three-dimensional structure of the second command wheel.

[0033] Figure 5 It is a three-dimensional structural diagram of the command lever.

[0034] Figure 6 It is a schematic diagram of the three-dimensional structure of the heavy hammer.

[0035] Figure 7 This is a schematic diagram of the structure of the perpetual calendar mechanical transmission device viewed from the front on February 28 of a leap year.

[0036] Figure 8 This is a schematic diagram of the structure of the perpetual calendar mechanical transmission device viewed from the back on February 28 of a leap year.

[0037] Fig. 9 It is a three-dimensional structural diagram of the perpetual calendar mechanical transmission device on February 28 of a leap year.

[0038] Fig.10 It is a schematic diagram of the structure of the perpetual calendar mechanical transmission device as seen from the front on February 28th of an ordinary year.

[0039] Fig.11 This is a schematic diagram of the structure of the perpetual calendar mechanical transmission device viewed from the back on February 28th of an ordinary year.

[0040] Fig.12 It is a schematic diagram of the structure of the perpetual calendar mechanical transmission device as seen from the front on March 1st of an ordinary year.

[0041] Fig.13 This is a schematic diagram of the structure of the perpetual calendar mechanical transmission device viewed from the back on March 1st of an ordinary year.

[0042] Fig.14 This is a schematic diagram of the transmission structure viewed from the front after the gear part of the perpetual calendar mechanical transmission device is removed on March 1st of an ordinary year.

[0043] Fig.15 This is a schematic diagram of the transmission structure viewed from the back after the gear part of the perpetual calendar mechanical transmission device is removed on March 1st of an ordinary year.

[0044] Fig.16 It is a schematic diagram of the structure of the perpetual calendar mechanical transmission device as seen from the front on March 31st of an ordinary year.

[0045] Fig.17 This is a schematic diagram of the structure of the perpetual calendar mechanical transmission device viewed from the back on March 31st of an ordinary year.

[0046] Fig.18 It is a schematic diagram of the structure of the perpetual calendar mechanical transmission device as seen from the front on April 30th of an ordinary year.

[0047] Fig.19 This is a schematic diagram of the structure of the perpetual calendar mechanical transmission device viewed from the back on April 30th of an ordinary year.

[0048] Fig. 20 It is a schematic diagram of the three-dimensional structure of a date wheel viewed from one direction in another embodiment of the present invention.

[0049] Fig.21 It is a schematic diagram of the three-dimensional structure of the date wheel viewed from another direction in another embodiment of the present invention. DETAILED DESCRIPTION

[0050] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0053] The present invention will be further described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0054] refer to Figure 1-19 As shown, the perpetual calendar mechanical transmission device 100 includes a date wheel mechanism 10, specifically, as Figure 1-Figure 2 As shown, the date wheel mechanism includes a date wheel 1, which can be driven by a power device. Generally, the date wheel is driven by the movement. When the hour hand in the movement completes 24 hours, the date wheel can be driven to rotate once. The date wheel is provided with 31 date wheel teeth 2, and the 31 date wheel teeth include an output wheel tooth 3 with a longer tooth full height. The output wheel teeth are provided to drive the first command wheel and the second command wheel described below. The date wheel is provided with 31 teeth, representing 31 days. When the hour hand in the movement completes 24 hours, the date wheel can be driven to rotate once. Therefore, one rotation of the date wheel represents one day, and one rotation represents one month. In order to indicate the date, the present invention is provided with a date pointer 4, which can rotate with the date wheel 1. When the date wheel is driven, it can drive the date pointer to indicate the current day number N, where N is any natural number from 1 to 31.

[0055] According to the current solar calendar calculation method, an ordinary year has 365 days, a leap year has 366 days, and there is a leap year every four years, with one less leap year every 100 years, and one more leap year every 400 years, that is, there are 97 leap years every 400 years. In the solar calendar calculation method, a year is divided into 12 months, of which January, March, May, July, August, October, and December are long months, with 31 days, February, April, June, September, and November are short months, of which April, June, September, and November have 30 days, and February distinguishes between leap years and ordinary years, with 28 days in an ordinary year and 29 days in a leap year.

[0056] The purpose of a perpetual calendar mechanical clock is to allow the machine to automatically identify the month and automatically jump to the next month after the end of the current month. However, as mentioned above, not every month in the 12 months of the year has the same number of days, and there is also a difference between ordinary years and leap years, so a mechanism that can automatically identify the month must be designed.

[0057] It is not difficult to find that in the 12 months of a year, whether it is a common year or a leap year, each month includes at least 28 days. The only difference is that after 28 days, in order for the perpetual calendar mechanical clock to correctly jump to the first day of the next month, it is necessary to make the date wheel skip 1 day, 2 days, 3 days, or naturally enter the next month in a short period of time when the corresponding month is about to end. This function will be realized in the following structure.

[0058] refer to Figure 2 As shown, in the present invention, a command cam 5 is provided on one side of the date wheel 1. Specifically, the command cam 5 is in the shape of a water drop, and has a circular portion 50 and a convex portion 51 connected to the circular portion. It should be noted that the command cam and the date wheel are designed separately, and the working principle of the cam is a prior art in the art, so it will not be described in detail here.

[0059] Furthermore, the command cam 5 is provided with a fan ring groove 52, and the command cam 5 and the date wheel 1 have a common rotation axis. The distance from the fan ring groove 52 to the rotation axis is roughly equivalent to the radius of the command cam 5. The purpose of setting the fan ring groove 52 will be described below. The date wheel 1 is provided with a driving member that can be inserted into the fan ring groove 52. When the date wheel rotates around the rotation axis, the command cam can be driven to rotate by the driving member; the command cam can swing relative to the rotation axis within the stroke limited by the fan ring groove. This action occurs at the end of a short month, that is, at the end of a short month, due to the need to skip 1 day, 2 days or 3 days, the command cam can only be driven by the driving member after the date wheel rotates 3 teeth instantly; on the contrary, if the fan ring groove is not provided, at the end of a short month, since the cam is synchronous, the cam will lift the command lever 7 described below, and the command lever 7 is lifted and drives the weight 8 described below to swing in a direction away from the date wheel 1, so the weight 8 cannot hammer the date wheel 1, and the effect of instantly skipping the preset date cannot be achieved. In the present invention, as a preferred embodiment, specifically, the driving member for driving the command cam 5 is a pin 53, the pin 53 is fixedly mounted on the date wheel 1, and the diameter of the pin is smaller than the width of the fan ring groove. Of course, as other embodiments, the driving member may also be other components that can be inserted into the fan-shaped groove, such as a bump. The fan ring groove in the present invention provides a certain swing stroke for the pin 53. Therefore, as other embodiments, as long as a hole that enables the pin 53 to swing is provided on the cam, it is an equivalent feature of the present invention.

[0060] When the date wheel of the present invention is installed on a perpetual calendar mechanical clock, it can be realized by fixing the rotating shaft 54 ​​on the date wheel. How to install the rotating shaft 54 ​​on the perpetual calendar mechanical clock belongs to the prior art in this field. Those skilled in the art can choose according to the actual structure, as long as the date wheel can rotate. It will not be described here. The command cam 5 is movably pivoted with the rotating shaft 54; the date pointer 4 is fixedly connected with the rotating shaft.

[0061] refer to Figure 1 As shown, a fan wheel 6 is provided on one side of the date wheel, and a fan ring notch 60 is formed on the date wheel corresponding to the fan wheel 6. The arc surface 61 of the fan wheel 6 and the small arc surface 62 corresponding to the fan ring notch 60 constitute an arc guide surface, and a hammering surface 63 is formed between the arc surface 61 of the fan wheel 6 and the fan ring notch 60. As a preferred embodiment, the central angle formed by the fan ring notch 60 relative to the center of the rotating shaft 54 ​​of the date wheel is 100 degrees, so that the weight 8 can be driven to slide out of the fan ring notch 60 by the command cam 5 after hammering the fan wheel 6; of course, as other embodiments, the central angle formed by the fan ring notch 60 can also be appropriately adjusted, for example, increased to 120 degrees. Of course, this angle must ensure that the weight 8 can abut against the arc surface 61 of the fan wheel 6 before the next hammering, that is, the weight 8 needs to return to a relatively high point. In this embodiment, the rotation axis of the date wheel is located inside the hammering surface 63 .

[0062] Of course, the present invention is not limited to the aforementioned implementation scheme, as long as one side of the date wheel has a relatively high point and a relatively low point, the distance from the relative high point to the rotation axis is greater than the distance from the relative low point to the rotation axis, one side of the relative high point is connected to the relative low point through a steep drop surface, and an arc-shaped guide surface is set from the relative high point on the other side of the relative high point. In this way, a drop is formed between the relative high point and the relative low point, and when the heavy hammer 8 passes over the relative high point, a hammer strike can be generated, causing the date wheel 1 to rotate rapidly. The purpose of setting the arc-shaped guide surface is to abut against the heavy hammer 8. In other words, under the action of the heavy hammer driving spring 9 described below, the heavy hammer 8 has a tendency to swing toward the arc-shaped guide surface, and the heavy hammer 8 can abut against the arc-shaped guide surface. When the heavy hammer 8 is pressed tighter by the heavy hammer driving spring 9, the pressure of the heavy hammer 8 on the arc-shaped guide surface is greater. At this time, if the change of the arc-shaped guide surface produces a drop, the driving force of the heavy hammer driving spring 9 can be released in an instant, and the heavy hammer 8 can hammer the date wheel 1 to rotate quickly. According to the different hammering strengths of the heavy hammer 8, the date wheel 1 can be rotated through three preset angles, which correspond to the 29th, 30th and 31st.

[0063] In this embodiment, the swing angle of the swing stroke of the command cam 5 defined by the fan ring groove 52 relative to the rotation axis of the date wheel 1 is equal to the rotation angle of the date wheel 1 when the date pointer 4 passes three days. Of course, there can be an appropriate positive margin, for example, slightly larger than the rotation angle of the date wheel when the date pointer 4 passes three days. In this way, when the date wheel reaches February 28, the command cam cannot immediately lift the command lever below, so as to ensure that the weight has sufficient elastic force. In other words, if the fan ring groove is not provided, when the date wheel reaches February 28, the command cam will immediately lift the command lever. Since the swing of the command lever causes the elastic force of the weight driving spring to be released, the date wheel cannot be struck, and naturally it cannot skip 29, 30 and 31. Therefore, the fan ring groove is provided to ensure that the date wheel can automatically correct the date, and accurately enter the next month from the current month through the cooperation with the date wheel and the weight.

[0064] refer to Figure 3 As shown, in order to cooperate with the aforementioned date wheel 1, the perpetual calendar mechanical transmission device 100 in the present invention also includes: a first command wheel 11, the first command cam 11 is provided with 48 gear teeth, the gear teeth on the first command cam 11 can be driven by the output gear teeth 3 on the date wheel 1, the first command wheel 11 rotates one circle and needs to be driven continuously by the date wheel 1 forty-eight times, that is, it takes four years for the first command wheel 11 to rotate one circle.

[0065] refer to Figure 4 As shown, it also includes a second command wheel 12, which is provided with 24 gear teeth. The second command wheel can be driven by the output gear teeth 3 of the date wheel. The second command wheel 12 needs to be driven continuously by the date wheel 1 for 24 times to rotate one circle. It can be seen that it takes two years for the second command wheel 12 to rotate one circle. In order to better engage the transmission, as a preferred embodiment, the rotation axes of the date wheel 1, the first command wheel 11 and the second command wheel 12 are arranged parallel to each other.

[0066] refer to Figure 3 , Figure 7-8As shown, a circular first command disc 13 is coaxially arranged on one side of the first command wheel 11. As a preferred embodiment, the first command disc and the first command wheel are designed in an integrated manner. The first command disc 13 is provided with three notches 130. The angle formed by the width of each notch relative to the axis of the first command disc 13 is equivalent to the central angle formed by the two gear teeth on the first command wheel 11 relative to the axis of the first command disc 13. The angle between the first notch and the second notch, and between the second notch and the third notch is 90 degrees. In other words, the notch corresponds to February and March of an ordinary year, and the notch will play a role in February and March of an ordinary year. Specifically, the first command disc 13 is divided into four areas at 90 degrees, three of which are provided with the notch, and the remaining one is not provided with the notch. The area with the notch corresponds to an ordinary year, and the area without the notch corresponds to a leap year, which corresponds to the leap year every four years in the Gregorian calendar. The other side of the first command wheel 11 is provided with a leap year indicator 14 that can rotate synchronously with it.

[0067] refer to Figure 4 , Figure 7-8 As shown, a second command disc 15 is provided on the second command wheel 12 at a side corresponding to the first command disc, and the second command disc 15 is provided with tooth tops 150 and tooth grooves corresponding to 24 months of two consecutive years according to the Gregorian calendar calculation method; the tooth grooves are 10 in total, wherein the tooth grooves include two deep tooth grooves 151 corresponding to February, and eight shallow tooth grooves 152 corresponding to April, June, September and November; the tooth tops are 14 in total, corresponding to January, March, May, July, August, October and December, wherein the tooth tops 150 corresponding to December and January are interconnected to form a whole, and the tooth tops 150 corresponding to July and August are interconnected to form a whole.

[0068] refer to Figure 5 , Figure 14-15As shown, the perpetual calendar mechanical transmission device of the present invention also includes a command lever 7, which is provided with a semicircular main body 161, one end of the main body 161 is provided with a first push claw 162 and a second push claw 163, the length of the second push claw 163 is greater than the length of the first push claw 162, and the command lever 7 is provided with a hinge axis; the second push claw 163 is used to abut and cooperate with the circumferential surface 131 of the first command disk 13 and the notch 130 on the first command disk 13; the first push claw 162 is used to abut and cooperate with the tooth top 150 and the tooth groove portion on the second command disk 15; the command lever 7 is provided with a cam driving part 164 located on the inner side of the main body 161, and the cam driving part 164 is used to cooperate with the command cam 5, and when the command cam 5 rotates, the command lever 7 can be lifted or released. The cam driving part 164 includes a straight strip rib arranged on the inner side of the main body 161, and the straight strip rib is roughly parallel to the opening of the main body 161.

[0069] refer to Figure 5 , Figure 7-8 As shown, in this embodiment, the command lever 7 is provided with a limit portion, and the purpose of providing the limit portion is to limit the swing stroke of the command lever around its hinge axis. Specifically, the limit portion includes a slot 165 provided on the command lever, and a limit pin 17 matched with the slot 165. When the command lever 7 swings, the slot 165 moves away from or approaches the limit pin 17, so that the limit pin 17 can slide relatively in the slot 165. As a preferred embodiment, the limit pin 17 is fixed to the movement of the mechanical clock through a fixed shaft 30. How to connect with the movement of the mechanical clock can be adjusted by those skilled in the art according to the structure of the watch, so it is not explained in the present invention, as long as the fixed function can be achieved. In order to drive the command lever, the present invention also includes a command lever driving spring 18, which is used to drive the command lever 7 to swing around its hinge axis. Preferably, the command lever drive spring 18 is fixed to the movement of the mechanical clock via a connecting shaft 19. Similarly, how to connect with the movement of the mechanical clock can be adjusted by those skilled in the art according to the structure of the watch, so it is not explained in the present invention as long as the fixed function can be achieved.

[0070] refer to Figure 6 , Figure 14-15As shown, the perpetual calendar mechanical transmission device of the present invention also includes a weight 8, which is hinged on the command lever 7 through an axis 21 and can swing with the command lever 7; the weight 8 is provided with a hammering portion 80 for cooperating with the command cam 5; in order to enable the weight 8 to move, a weight driving spring 9 is provided on the command lever 7, which is used to drive the weight 8 to swing around its hinge axis to provide a driving force for hammering the command cam. Specifically, the hinged position of the weight 8 is located at the middle position of the back side of the main body corresponding to the opening of the main body 161 on the command lever 7. The axis 21 to which the weight 8 is hinged is fixed on the movement of the mechanical clock, one end of the weight driving spring 9 is connected to the hinge axis of the command lever, and the other end is connected to the weight 8. As the weight swings, the elastic force of the weight driving spring 9 changes. The structure of the weight driving spring is not limited, as long as it can drive the weight. Reference Figure 6 As shown, in this embodiment, the weight is provided with a tip protruding outward, and the extension direction of the tip matches the direction in which the weight driving spring 9 drives the weight 8 to rotate. A bayonet 81 for connecting the weight driving spring 9 is provided at the other end of the weight away from the tip.

[0071] refer to Figure 7-19 As shown, the perpetual calendar mechanical transmission device of the present invention also includes a month wheel 20, which is engaged with the first command wheel 11. When the first command wheel 11 drives the month wheel 20 to rotate once, the month pointer 21 connected to the month wheel rotates from the current indicated month to the next month.

[0072] refer to Figure 5 As shown, in this embodiment, the slot 165 is close to the hinge axis of the weight 8.

[0073] In this embodiment, the date wheel 1, the first command wheel 11 and the second command wheel 12 are arranged in a triangle.

[0074] refer to Figure 7-Figure 19 As shown, on February 28th of a common year, the first push pawl extends to the bottom of the deep tooth groove portion, and the second push pawl extends to the bottom of the notch on the first command wheel; on February 28th of a leap year, the end of the second push pawl abuts against the circumferential surface of the first command disk, and the first push pawl is suspended in the deep tooth groove portion; on the 31st of a certain month, the end of the first push pawl abuts against the corresponding top of the tooth, and a gap exists between the end of the second push pawl and the circumferential surface of the first command disk; on the 30th of a certain month, the end of the first push pawl abuts against the bottom of the corresponding shallow tooth groove portion, and a gap exists between the end of the second push pawl and the circumferential surface of the first command disk.

[0075] In the present invention, the date wheel, the first command wheel, the second command wheel, the command lever and the weight are all made of metal materials, such as stainless steel, copper alloy and the like.

[0076] The working principle of the present invention is described below using February 28 of a leap year, with reference to Figure 7-Figure 9As shown, the date wheel rotates to February 28. Since it is a leap year, there is a 29th day in February. The first push claw 162 of the command lever 7 is suspended in the deep tooth groove 151 on the second command wheel 12, and the end of the second push claw 163 abuts against the circumferential surface 131 of the first command disk 11. At this time, the command lever 7 is subjected to the elastic force of the command lever driving spring 19, and the limit pin 17 is located at the opening of the slot 165. The weight 8 is subjected to the elastic force of the weight driving spring 9, and the outwardly protruding tip of the weight 8 abuts against the arc surface 61 of the sector wheel 6. The date wheel 1 continues to rotate. One day later, when the date reaches February 29, the outwardly protruding tip of the weight 8 gradually reaches and passes over the edge of the arc surface 61 of the sector wheel 6. The edge of the circle 61 is formed by the weight 8, and because the weight 8 is hook-shaped, under the action of the weight driving spring 9, the weight 8 passes over the edge of the circular arc surface 61 and slides to the bottom of the circle ring notch 62 through the hammering surface 63 between the circular arc surface 61 of the sector wheel 6 and the sector ring notch 60. In this process, due to the striking action of the weight 8, the date wheel 1 can turn an angle in an instant, so that the date wheel skips the 30th and 31st, and instantly enters March 1st; thereafter, as the date wheel 1 continues to rotate, the command lever 7 is lifted by the command cam 5, and the command lever 7 drives the weight 8 to rotate around its hinge axis, so that the weight 8 gradually leaves the sector ring notch 60 and abuts against the circular arc surface 61 of the sector wheel 6, and the weight driving spring 9 is compressed and begins to store energy again. The date wheel 1 continues to rotate, and drives the first command wheel 11 and the second command wheel 12 to rotate through the output gear 3 until the relative position between the command lever 7 and the limit pin 17 changes. When the weight 8 passes over the edge of the arc surface 61 of the sector wheel 6 again, it slides into the sector ring notch 60 through the hammering surface 63 between the arc surface 61 of the sector wheel 6 and the sector ring notch 60, and the weight 8 hits the date wheel to quickly skip the corresponding day. The number of days skipped by the date wheel 1 at the end of the corresponding month is fixed by the relative position between the limit slot 165 and the limit pin 17 on the command lever 7. This is because the limit pin 17 is fixed on the movement of the perpetual calendar mechanical clock, and the position of the limit slot 165 changes due to the swing of the command lever 7. When the bottom of the limit slot 165 is farther away from the limit pin 17, the weight 8 can move more. The greater the movement of the weight 8, the greater the angle of the date wheel 1. Therefore, the date wheel skips more days at the end of the month. Conversely, when the bottom of the limit slot is closer to the limit pin, the weight can move less. The smaller the movement of the weight, the smaller the angle of the date wheel. Therefore, the date wheel skips fewer days at the end of the month. Unlike leap years, in February of an ordinary year, when the time reaches 24:00 on February 28, the outwardly protruding tip of the weight 8 reaches the edge of the arc surface 61 of the sector wheel 6 and instantly passes over the edge of the arc surface 61 of the sector wheel 6. Due to the striking action of the weight 8, the date wheel 1 can instantly rotate an angle, so that the date wheel skips the 29th, 30th and 31st, and instantly enters March 1st.

[0077] Figure 18-19 The structure of this embodiment is shown on April 30, 2017. Figure 16-17 The structure of the embodiment of March 31st in an ordinary year is shown. On March 31st, the limit pin fits the bottom of the limit slot, and the distance between the two is small. Therefore, the date wheel does not need to jump quickly at the end of the month and naturally enters April 1st. On April 30th, the limit pin is located in the middle of the limit slot, and the distance between the two is large. Therefore, the date wheel needs to jump one day faster at the end of the month to enter May 1st. For example, on February 28th in an ordinary year, the reference Figure 10-11 As shown, the limit pin is away from the bottom of the limit groove, and the distance between the two is the largest. Therefore, the date wheel needs to jump 3 days fast at the end of the month to enter March 1st.

[0078] The present invention provides a perpetual calendar mechanical transmission device. With the cooperation of a date wheel, a first command wheel, a second command wheel, a command lever and a weight, the perpetual calendar mechanical clock can automatically identify ordinary years and leap years and large and small months in each year, automatically distinguish the specific days of each month and accurately correct the last day of each month to the first day of the next month. Moreover, as mentioned above, through the cooperation of the weight and the date wheel and by setting a preset rotation angle, the perpetual calendar mechanical clock can accurately realize date correction in an instant, greatly improving the timing accuracy of the mechanical clock and making the user experience better and more assured. Moreover, the perpetual calendar clock manufactured by the present invention can call back the time, solving the defect that the perpetual calendar structure in the prior art cannot call back the time.

[0079] refer to Figure 20-21 As shown, in another embodiment of the present invention, different from the above-mentioned embodiment, a snail wheel 25 is provided on one side of the date wheel, and the outer peripheral surface 250 of the snail wheel 25 forms an arc-shaped guide surface and a hammering surface 251.

[0080] In the present invention, the date wheel 1 rotates from No. 31 to No. 1, and at the same time, the output gear 3 on the date 1 drives the first command wheel 11 to rotate, so that the date and month change simultaneously.

[0081] In the present invention, when the command cam 5 pushes the command lever 7 up to the maximum stroke, the output gear 3 on the date wheel 1 drives the second command wheel 12 to rotate once.

[0082] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "an example", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0083] The above contents are further detailed descriptions of the present invention in combination with specific implementation methods, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention.

Claims

1. A date wheel mechanism for a perpetual calendar mechanical clock, characterized in that include: A date wheel, which can be driven by a power device and is provided with a plurality of date wheel teeth, wherein the plurality of date wheel teeth include an output wheel tooth with a relatively long tooth full height; A command cam is arranged on one side of the date wheel, the command cam is provided with a fan ring groove, and the command cam and the date wheel have a common rotation axis; the date wheel is provided with a driving member that can be inserted into the fan ring groove, and when the date wheel rotates around the rotation axis, the command cam can be driven to rotate by the driving member; the command cam can swing relative to the rotation axis within a stroke limited by the fan ring groove; An arc-shaped guide surface is provided on the other side of the date wheel, and the arc-shaped guide surface is arranged around the rotation axis, and the arc-shaped guide surface can be used to abut against the weight in the perpetual calendar mechanical clock; the arc-shaped guide surface has a relatively high point and a relatively low point with the distance to the rotation axis as a reference, one side of the relatively high point is connected to the relatively low point through a steep drop surface, and the arc-shaped guide surface is provided on the other side of the relatively high point starting from the relatively high point, and when the weight passes over the relatively high point and slides down to the relatively low point through the steep drop surface, it can hit the date wheel to make it rotate through three preset angles, and the three angles correspond to the 29th, 30th and 31st; The date pointer can rotate with the date wheel, and when the date wheel is driven, it can drive the date pointer to indicate the current day number N, wherein N is any natural number from 1 to 31.

2. The date wheel mechanism for a perpetual calendar mechanical clock according to claim 1, characterized in that: The swing angle of the swing stroke of the command cam defined by the fan ring groove relative to the rotation axis is equal to the rotation angle of the date wheel when the date hand passes three days.

3. The date wheel mechanism for a perpetual calendar mechanical clock according to claim 1, characterized in that: The number of the date wheel teeth on the date wheel is 31, and each time the date wheel rotates one tooth, the date pointer correspondingly rotates to the next day.

4. The date wheel mechanism for a perpetual calendar mechanical clock according to claim 1, characterized in that: The date wheel is fixedly provided with a rotating shaft, the rotation axis is the axis of the rotating shaft, the command cam is movably pivoted to the rotating shaft; the date pointer is fixedly connected to the rotating shaft.

5. The date wheel mechanism for a perpetual calendar mechanical clock according to any one of claims 1 to 4, characterized in that: A sector wheel is provided on one side of the date wheel, and the sector wheel forms a sector ring notch. The arc guide surface includes an arc surface of the sector wheel and an arc surface corresponding to the sector ring notch. The steep drop surface is a hammering surface connected to the arc surface of the sector wheel at one end and to the arc surface corresponding to the sector ring notch at the other end.

6. The date wheel mechanism for a perpetual calendar mechanical clock according to claim 5, characterized in that: The rotation axis of the date wheel is located within the hammering surface.

7. The date wheel mechanism for a perpetual calendar mechanical clock according to any one of claims 1 to 4, characterized in that: A snail wheel is provided on one side of the date wheel, and the arc-shaped guide surface is provided on the outer peripheral surface of the snail wheel.

8. A perpetual calendar mechanical transmission device for a mechanical clock, characterized in that: include: The date wheel mechanism according to any one of claims 1 to 7, further comprising: A first command wheel, which can be driven by the output gear on the date wheel through the gear teeth arranged thereon, and the first command wheel needs to be driven by the date wheel continuously forty-eight times for one rotation; A second command wheel, which can be driven by the date wheel through the gear teeth arranged thereon, and the second command wheel needs to be driven by the date wheel continuously twenty-four times for one rotation of the second command wheel; The rotation axes of the date wheel, the first command wheel and the second command wheel are arranged parallel to each other; A circular first command disc is coaxially disposed on one side of the first command wheel, and three notches are disposed on the first command disc. The angle formed by the width of each notch relative to the axis of the first command disc is equal to the central angle formed by two gear teeth on the first command wheel relative to the axis of the first command disc; the angle between the first notch and the second notch, and between the second notch and the third notch is 90 degrees; a leap year indicator hand that can rotate synchronously with the first command wheel is disposed on the other side of the first command wheel; A second command disc is provided on the second command wheel at a side corresponding to the first command disc, and the second command disc has tooth tops and tooth grooves corresponding to 24 months of two consecutive years according to the solar calendar calculation method; the tooth grooves are 10 in total, including two deep tooth grooves corresponding to February, and eight shallow tooth grooves corresponding to April, June, September and November; the tooth tops are 14 in total, corresponding to January, March, May, July, August, October and December, wherein the tooth tops corresponding to December and January are connected to each other, and the tooth tops corresponding to July and August are connected to each other; A command lever, which is provided with a semicircular main body, one end of which is provided with a first push claw and a second push claw, the length of the second push claw is greater than that of the first push claw, and the command lever is provided with a hinge axis; the first push claw is used to abut and cooperate with the circumferential surface of the second command disk and the notch on the second command disk; the second push claw is used to abut and cooperate with the top of the tooth and the tooth groove on the first command disk; the command lever is provided with a limit portion, and the limit portion is used to limit the swing stroke of the command lever around its hinge axis; A command lever driving spring, used for driving the command lever to swing around its hinge axis; A heavy hammer is hinged on the command lever and can swing with the command lever; the heavy hammer is provided with a hammering part for cooperating with the command cam; A weight driving spring, arranged on the command lever, for driving the weight to swing around its hinge axis to provide a driving force for hammering the steep drop surface; The month wheel is meshed with the first command wheel. When the first command wheel drives the month wheel to rotate once, the month pointer connected to the month wheel turns from the current indicated month to the next month.

9. The perpetual calendar mechanical transmission device for a mechanical clock according to claim 8, characterized in that: A cam driving part is provided on the command lever at the inner side of the main body, and the cam driving part is used to cooperate with the command cam, and can lift or release the command lever when the command cam rotates.

10. The perpetual calendar mechanical transmission device for a mechanical clock according to claim 9, characterized in that: The cam driving part comprises a straight strip rib arranged at the inner side of the main body, and the straight strip rib is substantially parallel to the opening of the main body.

11. The perpetual calendar mechanical transmission device for a mechanical clock according to claim 8, characterized in that: The limiting portion includes a slot arranged on the command lever and a limiting pin matched with the slot. When the command lever swings, the slot moves away from or approaches the limiting pin.

12. The perpetual calendar mechanical transmission device for a mechanical clock according to claim 11, characterized in that: The clamping slot is close to the hinge axis of the heavy hammer and is located outside the main body of the command lever.

13. The perpetual calendar mechanical transmission device for a mechanical clock according to claim 8, characterized in that: The heavy hammer is provided with a pointed portion protruding outwards.

14. The perpetual calendar mechanical transmission device for a mechanical clock according to claim 8, characterized in that: The date wheel, the first command wheel and the second command wheel are arranged in a triangle.

15. The perpetual calendar mechanical transmission device for a mechanical clock according to claim 8, characterized in that: On February 28th of a common year, the first push pawl extends to the bottom of the deep tooth groove, and the second push pawl extends to the bottom of the notch on the first command wheel; on February 28th of a leap year, the end of the second push pawl abuts against the circumferential surface of the first command disk, and the first push pawl is suspended in the deep tooth groove; on the 31st of a certain month, the end of the first push pawl abuts against the corresponding top of the tooth, and a gap exists between the end of the second push pawl and the circumferential surface of the first command disk; on the 30th of a certain month, the end of the first push pawl abuts against the bottom of the corresponding shallow tooth groove, and a gap exists between the end of the second push pawl and the circumferential surface of the first command disk.

16. The perpetual calendar mechanical transmission device for a mechanical clock according to claim 8, characterized in that: The date wheel is driven by the movement of the mechanical clock.

17. The perpetual calendar mechanical transmission device for a mechanical clock according to claim 11, characterized in that: The limit pin is fixed on the movement of the mechanical clock.

18. The perpetual calendar mechanical transmission device for a mechanical clock according to claim 8, characterized in that: The hinge shaft of the weight is fixed on the movement of the mechanical clock, and one end of the weight driving spring is connected to the hinge shaft of the command lever.

19. The perpetual calendar mechanical transmission device for a mechanical clock according to claim 8, characterized in that: The command lever driving spring is fixed to the movement of the mechanical clock via a connecting shaft.

20. The perpetual calendar mechanical transmission device for a mechanical clock according to claim 8, characterized in that: The date wheel, the first command wheel, the second command wheel, the command lever and the weight are all made of metal.

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