Drive reduction structure for watch case

Abstract

The driving speed reduction structure of the watch winding box comprises a body, a motor arranged in the body and having a driving gear, a plurality of intermediate gears arranged in the body, each intermediate gear having a large gear and a small gear, the small gear and the large gear rotating coaxially, the large gear of the first intermediate gear being driven by the driving gear, the small gear of the first intermediate gear engaging and rotating the large gear of the next intermediate gear, wherein the hardness of the large gear of the first intermediate gear is less than the hardness of the driving gear, an output gear arranged in the body and having a rotating shaft, the output gear being driven by the small gear of the last intermediate gear and driving the rotating shaft to rotate. Thus, the transmission noise can be reduced and the transmission is smoother, solving the problems of the known driving speed reduction structure that the transmission noise is large and the transmission is not smooth.

Description

Technical Field

[0001] This utility model relates to watch winding technology, and in particular to a drive reduction structure for a watch winding box. Background Technology

[0002] A watch is a timepiece worn on the wrist, and mechanical watches are particularly popular. Mechanical watches are powered by a mainspring within the movement, which drives gears and subsequently the hands. If left unused for extended periods or forgotten to be powered, the watch may become inaccurate in its time display or even stop running altogether. This necessitates the use of a winding mechanism. However, the winding mechanism is driven by a motor that powers a reduction gear, meaning that automatic winding cannot be completely silent. While the low-volume sound of the motor and gears might be unnoticed in a living room, the noise from the gears can be unpleasant, especially at night, in a bedroom or study, disrupting work and rest. This noise primarily originates from the winding mechanism's drive and reduction gear structure. Because the gears are all of uniform hardness and improperly configured, the gear transmission is noisy and not smooth enough, requiring improvement. Utility Model Content

[0003] In view of the above problems, the main purpose of this utility model is to provide a drive reduction structure for the watch chain, which can reduce transmission noise and make the transmission smoother.

[0004] To achieve the aforementioned main objectives, the drive reduction structure of the watch chain lock of this utility model includes a main body; a motor disposed on the main body, with a drive gear mounted on its shaft; a plurality of intermediate gears mounted on the main body; each intermediate gear has a large gear and a small gear, the small gear being coaxially connected to the large gear and rotating therethrough, the large gear of the foremost intermediate gear being rotated by the drive gear, and the small gear of the foremost intermediate gear meshing with and rotating the large gear of the next intermediate gear; wherein, the hardness of the large gear of the foremost intermediate gear is less than the hardness of the drive gear; an output gear disposed on the main body, with its shaft mounted on a rotating drum; the output gear being rotated by the small gear of the last intermediate gear, and the output gear driving the rotating drum to rotate.

[0005] Through the above-mentioned technical features, the hardness of the large gear of the first intermediate gear in the drive reduction structure of the watch upper chain of this utility model is less than that of the drive gear, which can reduce transmission noise and make the transmission smoother.

[0006] Preferably, the body comprises a first body and a second body combined together, and the two ends of each intermediate gear are respectively mounted on the first body and the second body.

[0007] Preferably, in the transmission sequence, the hardness of the large gear of the next intermediate gear is less than, equal to or greater than the hardness of the small gear of the previous intermediate gear.

[0008] Preferably, the hardness of the output gear is less than, equal to or greater than the hardness of the pinion of the intermediate gear it meshes with.

[0009] Preferably, the ratio of the number of teeth of the large gear and the small gear meshing with each intermediate gear decreases from large to small according to the transmission sequence.

[0010] Preferably, in the transmission sequence, the tooth thickness of the pinion of the next intermediate gear is greater than or equal to the tooth thickness of the pinion of the previous intermediate gear.

[0011] Preferably, the tooth width of the pinion of each intermediate gear is greater than the tooth width of the large gear.

[0012] Preferably, at least one of the intermediate gears has a pinion extending from the large gear in one axial direction, and at least one of the intermediate gears has a pinion extending from the large gear in the other axial direction.

[0013] Preferably, the axes of the intermediate gears are arranged in a straight line, or the axes of the drive gear, the intermediate gears, and the output gear are arranged in a straight line.

[0014] Preferably, the output gear drives the drum to rotate via a rotating shaft.

[0015] The detailed structure, features, assembly, and usage of the drive reduction structure for the watch chain wheel provided by this utility model will be described in the subsequent detailed description of the embodiments. However, those skilled in the art should understand that these detailed descriptions and the specific embodiments listed for implementing this utility model are for illustrative purposes only and are not intended to limit the scope of this utility model's patent application. Attached Figure Description

[0016] The following description, in conjunction with the accompanying drawings, further illustrates the drive reduction structure for the watch chain wheel provided by this utility model, wherein:

[0017] Figure 1 This is a perspective view of a preferred embodiment of the watch chain case of this utility model;

[0018] Figure 2 This is a partially exploded perspective view of the watch chain case according to a preferred embodiment of the present invention;

[0019] Figure 3 This is a perspective view of a preferred embodiment of the drive reduction structure of this utility model.

[0020] Figure 4This is a front view of a preferred embodiment of the drive reduction structure of this utility model;

[0021] Figure 5 This is a three-dimensional cross-sectional view of a preferred embodiment of the drive deceleration structure of this utility model.

[0022] Figure label:

[0023] 1: The watch's charm box

[0024] 2: Drive reduction structure

[0025] 10: Ontology

[0026] 10A: First Body

[0027] 10B: Second Body

[0028] 20: Motor

[0029] 21: Drive gear

[0030] 30A, 30B, 30C, 30D: Intermediate gears

[0031] 31A, 31B, 31C, 31D: Large gear

[0032] 33A, 33B, 33C, 33D: Small gear

[0033] 50: Output gear

[0034] 60: Cover

[0035] 60A: First cover

[0036] 60B: Second cover

[0037] B: Rotary drum

[0038] B1: Rotary drum shaft Detailed Implementation

[0039] First, it should be noted that the technical features provided by this utility model are not limited to the specific structures, uses, and applications described in the embodiments. The terminology used in the description is exemplary descriptive language that can be understood by those skilled in the art. The directional descriptive terms such as "front, up, down, back, left, right, top, bottom, inside, and outside" mentioned in this specification are merely exemplary descriptive terms based on normal usage directions and are not intended to limit the scope of the claims.

[0040] like Figures 1 to 5 As shown, in a preferred embodiment of this utility model, the drive reduction structure 2 of the watch upper chain box is used to drive a rotating cylinder B of the watch upper chain box 1 to rotate.

[0041] The drive reduction structure 2 includes a body 10, a motor 20, four intermediate gears 30A~30D, an output gear 50, and a cover 60.

[0042] The main body 10 is composed of a first main body 10A and a second main body 10B combined together.

[0043] The motor 20 is disposed on the first body 10A. The motor 20 has a drive gear 21 connected to the main shaft. In this embodiment, the drive gear 21 is made of metal, such as, but not limited to, copper.

[0044] Each intermediate gear 30A-30D is axially mounted on the main body 10. In this embodiment, both ends of each intermediate gear 30A-30D are axially mounted on the first main body 10A and the second main body 10B, respectively. Each intermediate gear 30A-30D has a large gear 31A-31D and a small gear 33A-33D. The drive gear 21 meshes with the large gear 31A of the first intermediate gear 30A to rotate. The small gear 33A of the first intermediate gear 30A meshes with the large gear 31B of the second intermediate gear 30B to rotate. The small gear 33B of the second intermediate gear 30B meshes with the large gear 31C of the third intermediate gear 30C to rotate. The small gear 33C of the third intermediate gear 30C meshes with the large gear 31D of the fourth intermediate gear 30D to rotate. The small gears 33A-33D of the previous intermediate gear 30A-30D mesh with the large gears 31A-31D of the next intermediate gear 30A-30D to rotate.

[0045] In this embodiment, the large gears 31A-31D and small gears 33A-33D of the same intermediate gears 30A-30D can be integrally formed, but this utility model is not limited to this, and they can also be assembled from two pieces.

[0046] In this embodiment, the large gear 31A and small gear 33A of the first intermediate gear 30A are made of a soft material called TPR (thermoplastic elastomer), but silicone or rubber can also be used. The hardness of the first intermediate gear 30A is less than that of the drive gear 21 of the motor 20. Therefore, when the drive gear 21 meshes with and rotates the large gear 31A of the first intermediate gear 30A, the softer material reduces friction and lowers transmission noise.

[0047] In this embodiment, the second intermediate gear 30B, the third intermediate gear 30C, and the fourth intermediate gear 30D are made of plastic steel, but this utility model is not limited to this and they can also be made of plastic. The hardness of the large gears 31A-31D of each intermediate gear 30A-30D is less than, equal to, or greater than the hardness of the meshing small gears 33A-33D.

[0048] In this configuration, the pinion 33A of the first intermediate gear 30A extends axially to one side from its large gear 31; the pinion 33B of the second intermediate gear 30B extends axially to the other side from its large gear 31; the pinion 33C of the third intermediate gear 30C extends axially to one side from its large gear 31; and the pinion 33D of the fourth intermediate gear 30D extends axially to one side from its large gear 31. At least one of the intermediate gears 30A-30D has its pinions 33A-33D extending axially to one side from its large gears 31A-31D, and at least one of the intermediate gears 30A-30D has its pinions 33A-33D extending axially to the other side from its large gears 31A-31D.

[0049] Preferably, the pinion 33C of the third intermediate gear 30C is located between the large gear 31C of the third intermediate gear 30C and the large gear 31D of the fourth intermediate gear 30D.

[0050] In this configuration, the tooth thickness of the pinion 33A of the first intermediate gear 30A is greater than or equal to the tooth thickness of the drive gear 21; the tooth thickness of the pinion 33B of the second intermediate gear 30B is greater than or equal to the tooth thickness of the pinion 33A of the first intermediate gear 30A; the tooth thickness of the pinion 33C of the third intermediate gear 30C is greater than or equal to the tooth thickness of the pinion 33B of the second intermediate gear 30B; and the tooth thickness of the pinion 33D of the fourth intermediate gear 30D is greater than or equal to the tooth thickness of the pinion 33C of the third intermediate gear 30C. Furthermore, according to the transmission sequence, the tooth thickness of the pinions 33A-33D of the next intermediate gear 30A-30D is greater than or equal to the tooth thickness of the pinions 33A-33D of the previous intermediate gear 30A-30D.

[0051] Preferably, the tooth width of the pinions 33A-33D of each intermediate gear 30A-30D is greater than the tooth width of the large gears 31A-31D.

[0052] Preferably, the tooth ratio between the large gear 31A of the first intermediate gear 30A and the drive gear 21 is greater than the tooth ratio between the large gear 31B of the second intermediate gear 30B and the small gear 33A of the first intermediate gear 30A; the tooth ratio between the large gear 31B of the second intermediate gear 30B and the small gear 33A of the first intermediate gear 30A is greater than the tooth ratio between the large gear 31C of the third intermediate gear 30C and the small gear 33B of the second intermediate gear 30B; and the tooth ratio between the large gear 31C of the third intermediate gear 30C and the small gear 33B of the second intermediate gear 30B is greater than the tooth ratio between the large gear 31D of the fourth intermediate gear 30D and the small gear 33C of the third intermediate gear 30C. The tooth ratios between the large gears 31A-31D of each intermediate gear 33A-33D and their meshing small gears 33A-33D decrease in the transmission sequence.

[0053] The output gear 50 meshes with the pinion 33D of the fourth intermediate gear 30D, and the output gear 50 is connected to the rotating drum B via a rotating shaft B1. Preferably, the output gear 50 is made of plastic, and the hardness of the output gear 50 is less than, equal to or greater than the hardness of the pinion 33D of the fourth intermediate gear 30D.

[0054] Preferably, the shafts of each intermediate gear 30A~30D are arranged in a straight line, or the shaft of the drive gear 21, the shafts of each intermediate gear 30A~30D, and the shaft of the output gear 50 are arranged in a straight line.

[0055] In this embodiment, the tooth ratio of the output gear 50 to the pinion 33D of the fourth intermediate gear 30D is greater than the tooth ratio of the large gear 31D of the fourth intermediate gear 30D to the pinion 33C of the third intermediate gear 30C, but it can also be less than or equal to it.

[0056] The cover 60 is fitted over the body 10. The cover 60 is preferably made of sound insulation and sound absorption material. The cover 60 has a first cover 60A and a second cover 60B. The first cover 60A covers the motor 20 and the first body 10A, and the second cover 60B covers the second body 10B.

[0057] The above describes the structural features of each component of the drive reduction structure 2 for the watch upper chain of this utility model. The following further introduces the usage and effects of the drive reduction structure 2 for the watch upper chain of this utility model.

[0058] The hardness of the large gear 31A of the first intermediate gear 30A provided by the drive reduction structure 2 of the watch chain in this utility model is less than that of the drive gear 21, so the meshing rotation is smoother and the meshing rotation noise is reduced.

[0059] The hardness of the large gears 31A-31D of each intermediate gear 30A-30D is less than, equal to, or greater than the hardness of the meshing small gears 33A-33D, which makes the meshing rotation smoother and reduces the meshing noise. The hardness of the output gear 50 is less than, equal to, or greater than the hardness of the small gear 33D of the fourth intermediate gear 30D, which makes the meshing rotation smoother and reduces the meshing noise.

[0060] According to the transmission sequence, the tooth thickness of the pinions 33A-33D of the next intermediate gear 30A-30D is greater than or equal to the tooth thickness of the pinions 33A-33D of the previous intermediate gear 30A-30D, which can make the meshing rotation smoother and reduce the meshing rotation noise.

[0061] The gear ratios of the large gears 31A-31D and the meshing small gears 33A-33D of each intermediate gear 30A-30D decrease from large to small according to the transmission sequence, which can make the meshing rotation smoother and reduce the meshing rotation noise.

[0062] The tooth width of the pinions 33A-33D of each intermediate gear 30A-30D is greater than that of the large gears 31A-31D, which can make the meshing rotation smoother and reduce the meshing rotation noise.

[0063] The first cover 60A and the second cover 60B of the cover 60 can better seal and block the transmission noise inside, thus making the outside quieter.

[0064] In addition to the embodiments listed above, this utility model can also be implemented in the following variations:

[0065] For example, the number of intermediate gears is not limited to four as mentioned above; it can also be two, three, five, six, or more.

[0066] Alternatively, the large and small gears of the same intermediate gear are not limited to having the same hardness as mentioned above; they can also have different hardnesses.

[0067] In summary, the embodiments listed in the proposed drive reduction structure for the watch upper winding mechanism of this utility model can indeed reduce transmission noise and make transmission smoother, thus achieving the purpose of this utility model.

Claims

1. A drive reduction structure for a watch chain mechanism, characterized in that, Includes: ontology; A motor is located on the main body, and a drive gear is provided on the shaft; Multiple intermediate gears are mounted on the main body; each intermediate gear has a large gear and a small gear, the small gear and the large gear are coaxial and rotate together, the large gear of the foremost intermediate gear is rotated by the driving gear, and the small gear of the foremost intermediate gear meshes with and rotates the large gear of the next intermediate gear; wherein, the hardness of the large gear of the foremost intermediate gear is less than the hardness of the driving gear. An output gear is located on the main body, and its shaft is located on the rotating drum. The output gear is rotated by the small gear of the last intermediate gear, and the output gear drives the rotating drum to rotate.

2. The drive reduction structure for the watch chain case according to claim 1, characterized in that, The body is composed of a first body and a second body, with each intermediate gear having its two ends respectively mounted on the first body and the second body.

3. The drive reduction structure for the watch chain case according to claim 1, characterized in that, According to the transmission sequence, the hardness of the large gear of the next intermediate gear is less than, equal to or greater than the hardness of the small gear of the previous intermediate gear.

4. The drive reduction structure for the watch chain case according to claim 1, characterized in that, The hardness of the output gear is less than, equal to, or greater than the hardness of the pinion of the intermediate gear it meshes with.

5. The drive reduction structure for the watch chain case according to claim 1, characterized in that, The ratio of the number of teeth of the large gear and the small gear that meshes with each intermediate gear decreases from large to small according to the transmission sequence.

6. The drive reduction structure for the watch chain case according to claim 1, characterized in that, According to the transmission sequence, the tooth thickness of the pinion of the next intermediate gear is greater than or equal to the tooth thickness of the pinion of the previous intermediate gear.

7. The drive reduction structure for the watch chain case according to claim 1, characterized in that, The tooth width of the pinion of each intermediate gear is greater than the tooth width of the large gear.

8. The drive reduction structure for the watch chain case according to claim 1, characterized in that, At least one pinion of the intermediate gear extends axially to one side from the large gear, and at least one pinion of the intermediate gear extends axially to the other side from the large gear.

9. The drive reduction structure for the watch chain case according to claim 1, characterized in that, The shafts of the intermediate gears are aligned in a straight line, or the shafts of the drive gear, the intermediate gears, and the output gear are aligned in a straight line.

10. The drive reduction structure for the watch chain case according to claim 1, characterized in that, The output gear drives the drum to rotate via the drum shaft.

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