Positioning structure of calendar ring of clock

Abstract

The utility model discloses a positioning structure of a clock calendar ring, which comprises a main clamping plate and a calendar ring, the calendar ring is rotatably mounted on the main clamping plate, a plurality of shifting teeth are arranged on the inner periphery of the calendar ring at intervals, the calendar ring is intermittently driven by a driving part mounted on the main clamping plate to change positions, and a positioning groove is formed between every two adjacent shifting teeth. The middle of a positioning piece is hinged to the main clamping plate, the positioning piece is provided with two arms, one arm of the positioning piece is provided with a positioning part, the other arm of the positioning piece is provided with an elastic part or an elastic body, one arm of the positioning piece is clamped on one positioning groove through the positioning part to position the calendar ring, and the other arm of the positioning piece is connected to the main clamping plate; the elastic effect of the other arm of the positioning piece is utilized, so that when the driving piece intermittently drives the calendar ring to change the position, the positioning part can be matched with the other positioning groove for repositioning. The utility model has the advantages of simple structure, higher positioning reliability and lower assembly difficulty, and is easy to realize automatic assembly.

Description

Technical Field

[0001] This utility model relates to the field of watch manufacturing technology, and in particular to a positioning structure for a watch calendar ring. Background Technology

[0002] Current mechanical date displays in watches rely on a calendar ring with 31 segments, marked from 1 to 31. The calendar ring rotates intermittently via a drive mechanism mounted on the mainplate of the watch, changing its position to display the date. After rotating, the calendar ring needs to be repositioned to ensure the date on it is accurately displayed in the watch's window.

[0003] Existing calendar ring positioning structures, such as the Chinese invention patent application number 201611199950.7 published on June 29, 2018, entitled "A Double-Layer Calendar Mechanism for a Clock," involve a first calendar ring 9 with an inner ring having a circumferential toothed ring composed of regularly spaced teeth. A first date-changing head 7a engages with the corresponding inner teeth of the first calendar ring 9, causing the first calendar ring 9 to jump forward a certain distance. Then, a second positioning spring 19b drives a second positioning block 18b to engage with the circumferential toothed groove of the inner ring of the first calendar ring 9 to position the first calendar ring 9. However, this positioning structure requires both the second positioning spring 19b and the second positioning block 18b to position the first calendar ring 9. The positioning components are relatively complex, and misalignment of the second positioning spring 19b and the second positioning block 18b can easily occur, reducing positioning reliability. Furthermore, this structure is difficult to automate due to the high assembly difficulty of the second positioning spring 19b, resulting in high manufacturing costs. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a positioning structure for a clock calendar ring, which has a simple structure, high positioning reliability, low assembly difficulty, and is easy to automate.

[0005] To achieve the above objectives, the technical solution of this utility model is: a positioning structure for a clock calendar ring, comprising a main plate and a calendar ring. The calendar ring is rotatably mounted on the main plate. Multiple actuating teeth are spaced apart around the inner periphery of the calendar ring. The calendar ring is intermittently driven to change position by a driving component mounted on the main plate. A positioning groove is formed between adjacent actuating teeth. A positioning component is hinged to the main plate at its center. The positioning component has two arms; one arm has a positioning part, and the other arm has an elastic part or is an elastic body. One arm of the positioning component uses the positioning part to engage the calendar ring in a positioning groove to position it. The other arm of the positioning component is connected to the main plate. Utilizing the elasticity of the other arm, when the driving component intermittently drives the calendar ring to change position, the positioning part can cooperate with another positioning groove for repositioning.

[0006] A further improvement is made: the main clamping plate is provided with a hinge post, and the positioning member has a hinge hole in the middle. The middle part of the positioning member is fitted onto the hinge post through the hinge hole to form a hinge, thus facilitating installation.

[0007] The main clamping plate is provided with a locking groove, and the end of the other arm of the positioning component is engaged in the locking groove. This facilitates assembly and enables automated assembly.

[0008] Preferably, the locking groove includes a vertical surface disposed on the main clamping plate, and a flange extending outward from the top of the vertical surface, the flange pressing against a portion of the upper end face of the other arm end of the positioning member.

[0009] Furthermore, the upper surface of the flange is a horizontal plane, which extends to a portion of the main clamping plate. The main clamping plate also has a downwardly sloping surface that connects to this horizontal plane. The end of the other arm of the positioning member is displaced along the sloping surface and engages with the locking groove via the horizontal plane. This facilitates automated assembly and reduces manufacturing costs.

[0010] Preferably, the positioning element is made of metal. The other arm of the positioning element includes a first bend, a first straight section, a second bend, a second straight section, and a head. One end of the first bend connects to the middle of the positioning element, the other end of the first bend connects to one end of the first straight section, the other end of the first straight section connects to one end of the second bend, the other end of the second bend connects to one end of the second straight section, and the other end of the second straight section connects to the head. The first and second bends form the elastic portion, and the head is the end of the other arm of the positioning element. This allows the positioning element to be formed by stamping a metal sheet, simplifying manufacturing and reducing costs.

[0011] In a further improvement, the positioning part has two positioning sides with an included angle greater than 90 degrees, and the two positioning sides respectively contact two adjacent actuating teeth. The two positioning sides with an included angle greater than 90 degrees facilitate the sliding of the positioning part relative to the actuating teeth and its engagement with another positioning groove for repositioning.

[0012] Preferably, the driving component includes a cylindrical gear pivotally connected to the main plate, with an actuating portion extending upward from the end face of the cylindrical gear. The cylindrical gear is connected to the watch gear transmission system, and the actuating portion intermittently drives the actuating teeth to rotate and change the position of the calendar ring. This facilitates intermittently driving the actuating teeth to rotate and change the position of the calendar ring at regular time intervals.

[0013] In a further improvement, the main clamping plate is provided with multiple protrusions spaced apart from the back of the calendar ring, and the back of the calendar ring abuts against these protrusions. This reduces the contact area between the calendar ring and the main clamping plate, lowers the friction between them, and facilitates the driving of the calendar ring.

[0014] As a further improvement, a cover plate is also installed on the main clamping plate, and the positioning element is located between the cover plate and the main clamping plate. The cover plate prevents the positioning element from detaching from the main clamping plate, further improving the reliability of the calendar ring positioning.

[0015] This invention features a positioning component with two arms. One arm engages with the positioning part in a positioning groove to position the calendar ring, while the other arm is connected to the main clamping plate. The elasticity of this other arm allows the positioning part to engage with the other positioning groove for repositioning when the driving component intermittently drives the calendar ring to change position. Thus, calendar ring positioning can be achieved with a single positioning component, and repositioning can be repeated even when the calendar ring changes position. The structure is relatively simple, and the positioning reliability is high. Furthermore, its assembly difficulty is greatly reduced, facilitating automated assembly and effectively lowering manufacturing costs. Attached Figure Description

[0016] Figure 1 This is a perspective view of the utility model;

[0017] Figure 2 This is a perspective view of the concealed cover plate of this utility model;

[0018] Figure 3 yes Figure 2 Enlarged view of point A;

[0019] Figure 4 This is a top view of the concealed cover plate of this utility model;

[0020] Figure 5 yes Figure 4 BB section view;

[0021] Figure 6 yes Figure 5 Enlarged view of point C;

[0022] Figure 7 This is a top-view perspective view of the main clamping plate of this utility model;

[0023] Figure 8 yes Figure 7 Enlarged view of point D;

[0024] Figure 9 This is a top-view enlarged view of the positioning component of this utility model. 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 9As shown, a positioning structure for a watch calendar ring includes a main plate 1 and a calendar ring 2. The calendar ring 2 is rotatably mounted on the main plate 1. Multiple actuating teeth 21 are spaced and regularly arranged around the inner periphery of the calendar ring 2, and positioning grooves 22 are formed between adjacent actuating teeth 21. The calendar ring 2 is intermittently driven to change position by a driving component 3 mounted on the main plate 1. Specifically, the driving component 3 includes a cylindrical gear pivotally connected to the main plate 1, with an actuating part 31 extending upward from the end face of the cylindrical gear. The cylindrical gear is connected to a watch gear transmission system. The actuating part 31 intermittently drives the actuating teeth 21 to rotate and change position according to a set time interval (which can be 24 hours via the watch gear transmission system).

[0027] The middle part of the positioning component 4 is hinged to the main clamping plate 1. Specifically, the main clamping plate 1 is provided with a hinge post 11, and the middle part of the positioning component 4 is provided with a hinge hole 41. The middle part of the positioning component 4 is sleeved on the hinge post 11 through the hinge hole 41 to form a hinge.

[0028] The positioning member 4 has two arms. One arm 42 of the positioning member 4 has a positioning part 421, and the other arm 43 has an elastic part or is an elastic body. One arm 42 of the positioning member 4 uses the positioning part 421 to lock onto a positioning groove 22 to position the calendar ring 2. The other arm 43 of the positioning member 4 is connected to the main clamping plate 1. Due to the elastic yielding function of the other arm 43 of the positioning member 4, when the driving member 3 intermittently drives the calendar ring 2 to change position, the positioning part 421 can slide relative to the actuating tooth 21 and cooperate with the other positioning groove 22 for repositioning.

[0029] The main clamping plate 1 is provided with a snap-fit ​​groove 12, and the end of the other arm 43 of the positioning member 4 is snapped into the snap-fit ​​groove 12. This snap-fit ​​engagement method facilitates automated assembly.

[0030] The locking groove 12 includes a vertical surface 121 provided on the main clamping plate 1, and a flange 122 extending outward from the top of the vertical surface 121. The flange 122 presses against part of the upper end face of the other arm 43 of the positioning member 4.

[0031] The upper surface of the flange 122 is a horizontal surface 123, which extends to a portion of the main clamping plate 1. The main clamping plate 1 is also provided with a downwardly inclined slope 124 that connects to the horizontal surface 123. The end of the other arm 43 of the positioning member 4 is moved along the inclined slope 124 and engages with the locking groove 12 via the horizontal surface 123. This structure makes it easier to move the end of the other arm 43 of the positioning member 4 into the locking groove 12 by using a pin, thus facilitating automated assembly.

[0032] The positioning member 4 is made of metal. The other arm 43 of the positioning member includes a first bend 431, a first straight section 432, a second bend 433, a second straight section 434, and a head 435. One end of the first bend 431 is connected to the middle of the positioning member 4, and the other end of the first bend 431 is connected to one end of the first straight section 432. The other end of the first straight section 432 is connected to one end of the second bend 433, and the other end of the second bend 433 is connected to one end of the second straight section 434. The other end of the second straight section 434 is connected to the head 435. The first bend 431 and the second bend 433 form the elastic part, and the head 435 is the end of the other arm 43 of the positioning member.

[0033] The positioning part 421 has two positioning side surfaces 422 with an included angle greater than 90 degrees, and the two positioning side surfaces 422 respectively contact two adjacent actuating teeth 21. The connection between the two positioning side surfaces 422 is transitioned by an arc. One arm 42 of the positioning member 4 is also provided with a process hole 423 to facilitate manufacturing.

[0034] The main clamping plate 1 has multiple protrusions 13 spaced apart from the back of the calendar ring 2, and the back of the calendar ring 2 abuts against the multiple protrusions 13. This reduces the friction generated when the calendar ring 2 rotates, making it easier to drive the calendar ring 2 to change position.

[0035] The main clamping plate 1 is also equipped with a cover plate 5, and the positioning element 4 is located between the cover plate 5 and the main clamping plate 1. The cover plate 5 can effectively prevent the positioning element 4 from detaching from the main clamping plate 1, ensuring the reliability of positioning.

[0036] In this embodiment, during assembly, the calendar ring 2 is installed first. Then, a robotic arm grasps the positioning component 4 and places it onto the hinge post 11 through the hinge hole 41 in the middle of the positioning component 4 to form a hinge. Simultaneously, the positioning part 421 of one arm 42 of the positioning component 4 is engaged in a positioning groove 22. Next, a pin on the robotic arm can be used to move the end of the other arm 43 of the positioning component 4 along the inclined plane 124 and engage it in the locking groove 12 through the horizontal plane 123. Then, the robotic arm grasps the cover plate 5 and places it onto the main clamping plate 1. This achieves automated assembly, greatly improving assembly efficiency and reducing manufacturing costs.

[0037] 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 positioning structure for a watch calendar ring, comprising a main plate and a calendar ring, the calendar ring being rotatably mounted on the main plate, the calendar ring having a plurality of actuating teeth spaced apart on its inner periphery, the calendar ring being intermittently driven to change position by a driving component mounted on the main plate, characterized in that: A positioning groove is formed between adjacent actuating teeth. The middle part of a positioning member is hinged to the main clamping plate. The positioning member has two arms. One arm of the positioning member has a positioning part and the other arm has an elastic part or is an elastic body. One arm of the positioning member uses the positioning part to lock the calendar ring in a positioning groove. The other arm of the positioning member is connected to the main clamping plate. The elasticity of the other arm of the positioning member allows the positioning part to cooperate with the other positioning groove for repositioning when the driving member intermittently drives the calendar ring to change position.

2. The positioning structure for a clock calendar ring according to claim 1, characterized in that: The main clamping plate is provided with a hinge post, and the middle part of the positioning member is provided with a hinge hole. The middle part of the positioning member is fitted onto the hinge post through the hinge hole to form a hinge.

3. The positioning structure for a clock calendar ring according to claim 1, characterized in that: The main clamping plate is provided with a locking groove, and the end of the other arm of the positioning member is locked in the locking groove.

4. The positioning structure for a clock calendar ring according to claim 3, characterized in that: The locking groove includes a vertical surface provided on the main clamping plate, and a flange extending outward from the top of the vertical surface, the flange pressing against part of the upper end face of the other arm end of the positioning member.

5. The positioning structure for a clock calendar ring according to claim 4, characterized in that: The upper surface of the flange is a horizontal plane, which extends to a part of the main clamping plate. The main clamping plate is also provided with a downwardly inclined slope that connects to the horizontal plane. The end of the other arm of the positioning member is moved along the inclined slope and inserted into the locking groove through the horizontal plane.

6. The positioning structure for a clock calendar ring according to claim 3, characterized in that: The positioning element is made of metal. The other arm of the positioning element includes a first bend, a first straight section, a second bend, a second straight section, and a head. One end of the first bend is connected to the middle of the positioning element, the other end of the first bend is connected to one end of the first straight section, the other end of the first straight section is connected to one end of the second bend, the other end of the second bend is connected to one end of the second straight section, and the other end of the second straight section is connected to the head. The first bend and the second bend form the elastic part, and the head is the end of the other arm of the positioning element.

7. The positioning structure for a clock calendar ring according to claim 1, characterized in that: The positioning part has two positioning sides with an included angle greater than 90 degrees, and the two positioning sides are in contact with two adjacent actuating teeth respectively.

8. The positioning structure for a clock calendar ring according to claim 1, characterized in that: The driving component includes a cylindrical gear pivotally connected to the main plate, with an actuating part extending upward from the end face of the cylindrical gear. The cylindrical gear is connected to the watch gear transmission system, and the actuating part intermittently drives the actuating gear to rotate and change the position of the calendar ring.

9. The positioning structure for a clock calendar ring according to claim 1, characterized in that: The main clamp plate has multiple protrusions spaced apart from the back of the calendar ring, and the back of the calendar ring abuts against the multiple protrusions.

10. A positioning structure for a clock calendar ring according to any one of claims 1 to 9, characterized in that: The main clamping plate is also equipped with a cover plate, and the positioning element is located between the cover plate and the main clamping plate.

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