Second gear shaft anti-falling movement
By incorporating a large-diameter cylindrical second gear shaft within the positioning groove of the quartz clock movement, the problem of the second gear shaft being easily pulled out during the second hand assembly process is solved, achieving more efficient assembly and protection of the movement.
Patent Information
- Application Number
- CN202423044592.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2034-12-10
AI Technical Summary
During the assembly of a finished quartz clock movement, the adjustment of the second hand's mounting height can easily cause the second gear shaft to be pulled out, resulting in damage to the movement.
A mechanism with an anti-detachment second gear shaft is designed. By setting a cylindrical section with a diameter larger than the other end of the second gear shaft in the positioning groove of the housing, combined with the clearance fit of the positioning hole, it is ensured that the second gear shaft is not easily pulled out during assembly.
This improved assembly efficiency, prevented the second gear shaft from detaching during assembly, and protected the integrity of the movement.
Smart Images
Figure CN223808640U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to quartz clock movement field especially relates to quartz clock movement second pinion shaft's assembly mechanism. BACKGROUND
[0002] Quartz clock movement often needs to correct the assembly height of the second hand in the finished clock assembly process, and the second hand needs to be frequently pulled out during the process, so the shaft of the second pinion is easily taken out, resulting in damage to the movement. SUMMARY
[0003] Against this background, the utility model aims at providing a quartz clock movement which effectively avoids the situation that the shaft of the second pinion is pulled out during the assembly process of the quartz clock movement in the finished clock.
[0004] To achieve the above-mentioned purpose, the utility model provides a technical scheme:
[0005] A second pinion shaft anti-extraction movement is provided with a housing and a timekeeping assembly, the timekeeping assembly includes a second wheel, the second wheel is provided with a second pinion shaft, the housing is provided with a positioning groove and a positioning hole of the second pinion shaft, one end of the second pinion shaft is rotatably assembled in the positioning groove, the other end passes through the positioning hole and is in gap cooperation with the positioning hole, and the second pinion shaft is characterized in that: the diameter of one end of the second pinion shaft assembled in the positioning groove is greater than that of the other end; and the inner diameter of the positioning groove is greater than the inner diameter of the minute hand positioning end or the hour hand positioning end.
[0006] One end of the second pinion shaft assembled in the positioning groove is a cylindrical segment, and the length of the cylindrical segment is greater than 1 mm and less than 3 mm.
[0007] Further, the length of the cylindrical segment is 1.8 mm±0.2 mm.
[0008] The length of the cylindrical segment is less than 1 / 10 of the total length of the second pinion shaft and greater than 1 / 30 of the total length of the second pinion shaft.
[0009] Further, the ratio of the length of the cylindrical segment of the second pinion shaft to the total length of the second pinion shaft is 1 / 15±1 / 35.
[0010] The utility model is characterized in that the diameter of one end of the second pinion shaft assembled in the positioning groove is greater than that of the other end, and the inner diameter of the positioning groove is greater than the diameter of the positioning hole, so that the second pinion and the second pinion shaft can be judged whether they have reached the correct position at a higher efficiency during assembly, and on the other hand, the situation that the shaft of the second pinion is pulled out during the assembly process of the finished clock can be effectively avoided.
[0011] The diameter of the larger end of the second pinion shaft is greater than the inner diameter of the second pinion shaft hole, which further optimizes the invention purpose of the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 This is a schematic diagram of the movement assembly in Example 1;
[0013] Figure 2 This is an exploded view of the assembly of the second gear and the second gear shaft in Example 1;
[0014] Figure 3 This is a schematic diagram of the movement assembly in Example 2;
[0015] Figure 4 This is an exploded view of the assembly of the second gear and the second gear shaft in Example 2. Detailed Implementation Example 1
[0016] like Figures 1-2 The illustrated second gear shaft anti-detachment movement includes a movement housing and a gear transmission system. The gear transmission system includes: a motor wheel / drive wheel 1, a first intermediate wheel 2, a second intermediate wheel 3, a third intermediate wheel 4, and a timekeeping assembly 5. The motor wheel 1 is equipped with a magnet 11. The first intermediate wheel 2 has a gear shaft hole 21. The gear seat matching the gear with the hole has a positioning shaft 22. The positioning shaft 22 is sleeved in the gear shaft hole 21 and the positioning shaft 22 and the gear shaft hole 21 are clearance-fitted. The diameter of both the positioning shaft 22 and the gear shaft hole 21 is less than 2mm. The gear seat is located inside the movement housing.
[0017] The timekeeping assembly 5 includes a second wheel 51, a minute wheel, and an hour wheel. The second wheel 51 is provided with a second gear shaft 52. The housing is provided with a positioning groove 53 and a positioning hole 54 for the second gear shaft 52. One end of the second gear shaft 52 is rotatably mounted in the positioning groove 53, and the other end passes through the minute wheel limiting end. The minute wheel limiting end passes through the hour wheel limiting end, and the hour wheel limiting end passes through the positioning hole 54 and is clearance-fitted with the positioning hole. The diameter of the end of the second gear shaft 52 that is mounted in the positioning groove 53 is larger than that of the other end.
[0018] The movement housing includes a front cover and a rear cover. The positioning groove is located on the rear cover. That is, the diameter of the end of the second gear shaft assembled on the rear cover is larger than that of other parts. Therefore, it can effectively overcome the problem that the diameter of the second gear shaft in traditional movements is too small, which can easily cause it to puncture the rear cover of the movement during assembly.
[0019] The second gear shaft is assembled into a cylindrical section at one end of the positioning groove. The length of the cylindrical section is greater than 1 mm and less than 3 mm.
[0020] Furthermore, the length of the cylindrical segment is 1.8mm ± 0.2mm.
[0021] The length of the cylindrical segment is less than 1 / 10 of the total length of the second gear shaft and greater than 1 / 30 of the total length of the second gear shaft.
[0022] Further, the ratio of the length of the cylindrical section of the second pinion shaft to the total length of the second pinion shaft is 1 / 15±1 / 35.
[0023] Since the partial movement does not have a minute hand, the inner diameter of the positioning groove is larger than the inner diameter of the minute hand positioning end or the hour hand positioning end, that is, for the movement with a minute hand gear, the inner diameter of the positioning groove is larger than the inner diameter of the minute hand positioning end; for the movement without a minute hand gear, the inner diameter of the positioning groove is larger than the inner diameter of the hour hand positioning end. Example 2
[0024] Figures 3-4 Another anti-extraction movement with a second pinion shaft for the second pinion and second pinion shaft matching scheme described in Example 1.
Claims
1. A second gear shaft anti-detachment movement, the movement comprising a housing and a timekeeping assembly, the timekeeping assembly including a second wheel, the second wheel having a second gear shaft, the housing having a positioning groove and a positioning hole for the second gear shaft, one end of the second gear shaft being rotatably mounted in the positioning groove, and the other end passing through the positioning hole and having a clearance fit with the positioning hole, characterized in that: The second gear shaft is assembled in one end of the positioning slot, and the diameter of the one end is larger than that of the other end.
2. A seconds pinion shaft anti-lever escapement according to claim 1, characterized in that: The diameter of the one end of the second gear shaft is larger than the inner diameter of the second gear shaft hole.
3. A seconds pinion shaft anti-lever escapement according to claim 1, characterized in that: The one end of the second gear shaft assembled in the positioning slot is a cylindrical segment, and the length of the cylindrical segment is greater than 1 mm and less than 3 mm.
4. A seconds pinion shaft anti-lever escapement as claimed in claim 3, characterized in that: The length of the cylindrical segment is 1.8 mm±0.2 mm.
5. A seconds pinion shaft anti-lever escapement according to claim 3, characterized in that: The length of the cylindrical segment is less than 1 / 10 of the total length of the second gear shaft and greater than 1 / 30 of the total length of the second gear shaft.
6. A seconds pinion shaft anti-lever escapement according to claim 4, characterized in that: The ratio of the length of the cylindrical segment of the second gear shaft to the total length of the second gear shaft is 1 / 15±1 / 35.