Anti-loosening structure of a clock hand

Abstract

The utility model discloses a kind of anti-loosening structure of clock and watch pointer, it is related to anti-loosening structure technical field, including second gear, the vertical fixed connection of fixed column is in the middle part of second gear upper end, fixed column top end is equipped with positioning mechanism, and fixed column outside is equipped with minute cylinder, and the hour hand gear column is equipped with in minute cylinder upper end;The utility model is through the cooperation of fixed column, fixed cover, second extension spring and second hand pointer, it is convenient to avoid glue ageing failure problem, improve the durability and stability of second hand fixed, and then can realize the function that second hand is long-term stable, no shaking displacement under temperature change environment, again through the cooperation of minute cylinder, positioning block, first extension spring and minute hand pointer, it is convenient to adjust time and plug minute hand, and it will not aggravate shaft hole abrasion when plugging minute hand, improve the wear resistance and anti-loosening effect of minute hand fixed, and then can realize the function that minute hand still keeps stable under frequent time adjustment scene, finally solve the problem that traditional structure is easy to wear and tear and frequent adjustment pointer shaking displacement.

Description

Technical Field

[0001] This utility model relates to the field of anti-loosening structure technology, and in particular to an anti-loosening structure for clock hands. Background Technology

[0002] As precision instruments that combine timekeeping and decorative value, the stability of the pointer system of a watch directly determines its timekeeping accuracy and product lifespan. Whether it is a mechanical watch, a quartz watch, or an electronic watch, the hands (second hand, minute hand, hour hand) must be precisely connected to the movement's transmission components (gears, shafts) through a fixed structure to ensure that they do not become loose or deviate during long-term operation (thousands of rotations per day), environmental changes (temperature fluctuations, vibration and shock), and daily use (time adjustment operations, accidental bumps). Otherwise, it will lead to inaccurate timekeeping (deviation exceeding 1 minute / day), stuck hands, or even falling off, seriously affecting the user experience and product reliability. The existing anti-loosening structure for clock hands relies on a tight fit between the pointer shaft hole and the gear shaft, along with adhesive for fixation. However, the adhesive is prone to aging and failure due to long-term temperature changes, and the interference fit may loosen due to wear of the shaft hole during assembly. Especially in scenarios where time adjustment is frequent, repeated insertion and removal of the pointer can exacerbate the clearance, causing the pointer to wobble or shift. Therefore, the above-mentioned technical problems need to be addressed. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing an anti-loosening structure for clock hands.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a clock hand anti-loosening structure, including a second gear, a fixing post vertically fixed to the middle of the upper end of the second gear, a positioning mechanism installed at the top of the fixing post, a minute cylinder sleeved on the outside of the fixing post, an hour gear post sleeved on the upper end of the minute cylinder, and a limiting mechanism symmetrically installed on the inner side of the minute cylinder.

[0005] Preferably, the positioning mechanism includes a circular groove vertically formed at the upper end of the fixed column, a fixed cover is vertically movable and engaged in the groove, and a second telescopic spring is installed between the bottom of the fixed cover and the bottom of the groove.

[0006] Preferably, the bottom of the fixing cover is provided with an anti-detachment block, and a second hand pointer is sandwiched between the fixing cover and the fixing post, and the second hand pointer is provided with an anti-detachment groove corresponding to the anti-detachment block.

[0007] Preferably, a minute gear is fixedly provided on the outer side of the lower end of the minute cylinder, and an hour gear post is sleeved on the top of the minute cylinder corresponding to the minute gear.

[0008] Preferably, an hour hand is horizontally fixed to one side of the hour gear post.

[0009] Preferably, the limiting mechanism includes symmetrically opened positioning grooves on the inner side of the upper end of the minute cylinder, each positioning groove having a positioning block movably engaged, a first telescopic spring being installed between the inner side of the positioning block and the bottom wall of the positioning groove, and a minute hand pointer being vertically inserted between the positioning blocks, with limiting grooves respectively opened at the lower end of the minute hand pointer corresponding to the two positioning blocks.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model, through the cooperation of the fixing column, fixing cover, second telescopic spring and second hand, facilitates the avoidance of glue aging and failure, improves the durability and stability of the second hand fixation, and thus enables the second hand to remain stable for a long time without shaking or shifting under temperature change environment. Furthermore, through the cooperation of the minute cylinder, positioning block, first telescopic spring and minute hand, it is easy to prevent the shaft hole from being aggravated when inserting and removing the minute hand for time adjustment, improves the wear resistance and anti-loosening effect of the minute hand fixation, and thus enables the minute hand to remain stable even in frequent time adjustment scenarios. Finally, it solves the problems of easy wear and shaking and shifting of the traditional structure when frequently adjusting the hand. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall three-dimensional structure proposed in this utility model; Figure 2 This is a three-dimensional structural diagram of the second hand pointer proposed in this utility model; Figure 3 This is a three-dimensional structural diagram of the minute hand pointer proposed in this utility model; Figure 4 This is a three-dimensional structural diagram of the hour hand proposed in this utility model; Figure 5 This is a top view cross-sectional structural diagram of the present invention; Figure 6 This is a side view sectional structural diagram of the present invention; Figure 7 This is a schematic diagram of the second hand pointer structure proposed in this utility model; Figure 8 This is a schematic diagram of the lower structure of the minute hand pointer proposed in this utility model.

[0012] The numbers in the diagram are: 1. Second hand gear; 2. Minute hand gear; 3. Hour hand gear post; 4. Hour hand; 5. Minute hand; 6. Second hand; 7. Fixed cover; 8. Fixed post; 9. Minute cylinder; 10. Positioning block; 11. First telescopic spring; 12. Second telescopic spring; 13. Limiting groove. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0014] Example: See Figures 1 to 8 This utility model discloses a clock hand anti-loosening structure, comprising a second gear 1, a fixing post 8 vertically fixed to the middle of the upper end of the second gear 1, a positioning mechanism installed at the top of the fixing post 8, a minute cylinder 9 sleeved on the outside of the fixing post 8, an hour gear post 3 sleeved on the upper end of the minute cylinder 9, and symmetrically installed limiting mechanisms on the inner side of the minute cylinder 9. Through the second gear 1, fixing post 8, positioning mechanism, minute cylinder 9, hour gear post 3, and limiting mechanisms, the overall framework of the clock hand anti-loosening structure is easily constructed, providing an installation carrier for the second, minute, and hour hands, and initially forming a basic structure for multi-hand coordinated rotation and anti-loosening. The positioning mechanism includes a circular groove vertically opened at the upper end of the fixing post 8, within which vertical movement is possible. A fixing cover 7 is snapped in place. A second telescopic spring 12 is installed between the bottom of the fixing cover 7 and the bottom of the groove. Through the groove of the fixing post 8, the fixing cover 7, and the second telescopic spring 12, the elastic force of the second telescopic spring 12 can be used to push the fixing cover 7, providing elastic clamping force for the subsequent fixing of the second hand and assisting in the anti-loosening positioning of the second hand. The bottom of the fixing cover 7 is provided with an anti-loosening block, and the second hand pointer 6 is sandwiched between the fixing cover 7 and the fixing post 8. The second hand pointer 6 has an anti-loosening groove corresponding to the anti-loosening block. Through the anti-loosening block of the fixing cover 7, the second hand pointer 6, and the anti-loosening groove of the second hand, the anti-loosening block can be easily inserted into the anti-loosening groove of the second hand. With the clamping action of the fixing cover 7, the second hand is stably fixed on the fixing post 8, preventing the second hand from loosening or shifting.

[0015] In this invention, a minute gear 2 is fixedly mounted on the outer side of the lower end of the minute cylinder 9. An hour gear post 3 is sleeved above the minute gear 2 on the minute cylinder 9. The minute cylinder 9, minute gear 2, and hour gear post 3 provide a convenient mounting channel for the minute hand. Simultaneously, the minute gear 2 drives the minute cylinder 9 to rotate, while the hour gear post 3 provides mounting support for the hour hand, forming the transmission and mounting foundation for the minute and hour hands. An hour hand pointer 4 is horizontally fixed to one side of the hour gear post 3. The hour gear post 3 and hour hand pointer 4 facilitate the stable mounting of the hour hand pointer 4 onto the hour gear post 3, allowing the hour hand to rotate synchronously with the gear post to indicate the time. This ensures the stability of the hour hand after installation and prevents rotation. During the process, it may come loose; the limiting mechanism includes symmetrically opened positioning grooves on the inner side of the upper end of the minute cylinder 9, and each positioning groove is movably engaged with a positioning block 10. A first telescopic spring 11 is installed between the inner side of the positioning block 10 and the bottom wall of the positioning groove, and the minute hand pointer 5 is vertically inserted between the positioning blocks 10. The lower end of the minute hand pointer 5 is respectively opened with limiting grooves 13 corresponding to the two positioning blocks 10. Through the positioning grooves of the minute cylinder 9, the positioning blocks 10, the first telescopic spring 11, the minute hand pointer 5, and the limiting grooves 13 of the minute hand, the first telescopic spring 11 can push the positioning block 10 into the limiting groove 13 of the minute hand, fix the minute hand on the minute cylinder 9, and prevent the minute hand from coming loose during rotation or use.

[0016] Working Principle: In the use of this utility model, the device first uses the second gear 1 as the underlying transmission carrier. The fixed post 8, vertically fixed to the middle of its upper end, provides the installation reference for the second hand. The minute cylinder 9, sleeved on the outside of the fixed post 8, realizes the layered layout of the minute and second hands. The hour gear post 3, sleeved on the upper end of the minute cylinder 9, provides the installation carrier for the hour hand. The three form a coaxial nested structure of "fixed post 8 - minute cylinder 9 - hour gear post 3", ensuring that the second, minute, and hour hands rotate around the same axis, satisfying the coaxiality requirement of clock timing. Then, when installing the second hand, first press the second hand onto the upper end of the fixed post 8, and then press the fixing cover 7 into the fixed post 8. A second telescopic spring 12 is fixedly installed in the fixed column 8. Then, the fixed cover 7 is screwed onto the second telescopic spring 12. At the same time, the locking structure of the anti-disengagement block and the anti-disengagement groove restricts the up and down movement of the second hand along the axis of the fixed column 8. Then, the first telescopic spring 11 and the positioning block 10 fix the minute hand 5, which is inserted vertically downward into the inside of the minute cylinder 9. At the same time, the limiting groove 13 on the minute hand is aligned with the position of the positioning block 10. The first telescopic spring 11 returns to its deformation and pushes the positioning block 10 to extend inward and lock into the limiting groove 13 of the minute hand to prevent the minute hand from sliding up and down or shifting circumferentially relative to the minute cylinder 9, and to ensure that the minute hand rotates synchronously with the minute cylinder 9.

[0017] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A clock hand anti-loosening structure, comprising a second gear (1), characterized in that: A fixed column (8) is vertically fixed to the middle of the upper end of the second gear (1). A positioning mechanism is installed at the top of the fixed column (8), and a minute cylinder (9) is sleeved on the outside of the fixed column (8). An hour gear column (3) is sleeved on the upper end of the minute cylinder (9), and a limiting mechanism is symmetrically installed on the inner side of the minute cylinder (9).

2. The anti-loosening structure for clock hands according to claim 1, characterized in that: The positioning mechanism includes a circular groove vertically opened on the upper end of the fixed column (8), and a fixed cover (7) is vertically movable and snapped into the groove. A second telescopic spring (12) is installed between the bottom of the fixed cover (7) and the bottom of the groove.

3. The anti-loosening structure for clock hands according to claim 2, characterized in that: The bottom of the fixed cover (7) is provided with an anti-detachment block, and a second hand pointer (6) is sandwiched between the fixed cover (7) and the fixed post (8). The second hand pointer (6) is provided with an anti-detachment groove corresponding to the anti-detachment block.

4. The anti-loosening structure for clock hands according to claim 1, characterized in that: A minute gear (2) is fixedly provided on the outer side of the lower end of the minute cylinder (9), and an hour gear column (3) is sleeved on the upper part of the minute cylinder (9) corresponding to the minute gear (2).

5. The anti-loosening structure for clock hands according to claim 4, characterized in that: The hour hand pointer (4) is horizontally fixed to one side of the hour hand gear column (3).

6. The anti-loosening structure for clock hands according to claim 5, characterized in that: The limiting mechanism includes symmetrically opened positioning grooves on the inner side of the upper end of the minute cylinder (9). Each positioning groove is movably engaged with a positioning block (10). A first telescopic spring (11) is installed between the inner side of the positioning block (10) and the bottom wall of the positioning groove. A minute hand pointer (5) is vertically inserted between the positioning blocks (10). The lower end of the minute hand pointer (5) is provided with limiting grooves (13) corresponding to the two positioning blocks (10).

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