Knob type retractable watchband and watch

Abstract

In practice, a user rotates a driving knob towards a tightening rotation direction to drive a gear to rotate, and the gear drives a first rack and a second rack on opposite sides to move in opposite directions, so that the overlapped part of a first strap body and a second strap body is gradually enlarged, and the whole watchband is shortened; meanwhile, a rotation stopping elastic claw of the rotation stopping component is clamped on a corresponding part such as a ring tooth of a retracting and releasing shell by utilizing claw teeth so as to position a gear; on the contrary, the user rotates the driving knob in the loosening rotation direction to release the clamping position of the rotation stopping component so as to drive the gear to rotate reversely, and the gear drives the first rack and the second rack on the opposite sides to move in the direction away from each other, so that the overlapped part of the first strap body and the second strap body is gradually reduced, and the whole watchband is lengthened; and meanwhile, a rotation stopping elastic claw of the rotation stopping component is clamped on a corresponding part such as a ring tooth of a retracting and releasing shell by utilizing claw teeth so as to position a gear.

Description

Technical Field

[0001] The utility model relates to the field of daily life, in particular to a knob-type retractable watchband and a watch. Background Art

[0002] Traditionally, watch straps on the market use pin buckles, but there are also hook buckles, snap buckles, folding buckles, folding safety buckles and butterfly buckles. Pin buckles are generally suitable for belts, and the rotating pin is inserted into different holes of the belt for adjustment and positioning. Hook buckles generally have a hook and a snap mouth to hook. Snap buckles generally use a card head and a card slot to press the buckle. Folding buckles usually have two or three folds, and the metal sheet is folded and shortened and a snap is set at the end. Folding safety buckles generally add a safety buckle sheet to the folding buckle to prevent the folding buckle from being accidentally opened. The principle of the butterfly buckle is similar to that of the folding buckle, but it is generally buckled together in the middle of the metal sheet. The above watch straps have their own characteristics and advantages and disadvantages, and are suitable for different watches or watch straps based on their structural limitations. However, these watch strap buckles on the market have complex structures, cumbersome operations, and are inconvenient to adjust the length and tightness of the strap at will, and their practicality needs to be improved.

[0003] In view of this, the inventor of this case conducted in-depth research on the above-mentioned issues, which led to the emergence of this case. Utility Model Content

[0004] One purpose of the utility model is to provide a knob-type retractable watch strap which can flexibly and conveniently adjust any tightness with high precision.

[0005] The second purpose of the utility model is to provide a watch, the strap of which has the advantages of being able to flexibly and conveniently adjust any tightness with high precision.

[0006] In order to achieve the above object, the utility model adopts the following technical solution:

[0007] The second strap is connected to the second strap body by the first and second strap connecting parts, and the first and second strap connecting parts are connected to the second and second strap connecting parts by the second and second strap connecting parts. The mounting opening is provided with a first inlet and a second inlet and a mounting opening being connected with each other; the first belt body is provided with a first rack, the second belt body is provided with a second rack, the driving knob is provided with a gear meshing with the first rack and the second rack, and a button body driving the gear to rotate; the gear is located between the first rack and the second rack, the first rack and the second rack are located on both sides of the gear and meshing with the gear respectively; the gear is provided with a rotation-stopping component to prevent the gear from reversing; the rotation-stopping component includes an elastic rotation-stopping claw, the elastic rotation-stopping claw includes an elastic claw arm and claw teeth arranged at the free end of the elastic claw arm; the gear has a tightening rotation direction for tightening the first belt body and the second belt body, and a loosening rotation direction for loosening the first belt body and the second belt body; the elastic claw arm extends from the fixed end to the free end in the loosening rotation direction; the elastic claw arm has a tension toward the outer circle and toward the inner side wall of the mounting opening, and the claw teeth are formed on the outer side of the free end of the elastic claw arm.

[0008] The driving knob includes a driving component for driving the anti-rotation elastic claw; the driving component includes a button protrusion arranged on the inner surface of the button body; the anti-rotation component also includes a claw ring that carries the anti-rotation elastic claw and is located in the inner circle of the anti-rotation elastic claw, and the anti-rotation elastic claw is connected to the claw ring through a claw connecting part; the button protrusion extends between adjacent claw connecting parts; and there is a moving space between adjacent claw connecting parts for the button protrusion to move in the tightening rotation direction or the loosening rotation direction.

[0009] It also includes a driving switch for driving the claw teeth to disengage from the ring teeth; the driving switch includes a switch main driving part arranged on the button body, and a switch driven part arranged on the anti-rotation elastic claw; the free end of the elastic claw arm has a claw top surface facing the button body, and a claw bottom surface facing the opposite direction; the switch main driving part is a main driving recess or a main driving protrusion formed on the inner surface of the button body, and the switch driven part is a driven protrusion formed on the claw top surface and extending into the main driving recess, or a driven recess formed on the claw top surface and for the main driving protrusion to extend into.

[0010] The driven protrusion is a protruding column formed on the top surface of the claw, and the main driving recess is a groove formed on the inner surface of the button body; the main driving recess has a tightening recess end facing the tightening rotation direction and a relaxing recess end facing the relaxing rotation direction, and the main driving recess has a driving inclined surface located in the outer ring of the driven protrusion and driving the driven protrusion toward the inner ring, and the driving inclined surface is gradually inclined toward the inner ring from the relaxing recess end to the tightening recess end; the main driving recess has an inner ring groove wall located in the inner ring of the driven protrusion, and the inner ring groove wall has a swinging space between the relaxing recess end and the driven protrusion for the driven protrusion to move toward the inner ring.

[0011] The free end of the elastic claw arm has a claw head forming a driven convex portion, and the claw head protrudes toward the inner circle; claw teeth are formed on the outer circle side of the claw head; and the driven convex portion is formed on the claw top surface of the claw head.

[0012] The anti-rotation elastic claw is connected with the gear; the anti-rotation component comprises more than two anti-rotation elastic claws evenly arranged around the axis of the gear, and the free ends of the elastic claw arms face the same direction.

[0013] The gear has a wheel through hole, and the button body has a button column facing the gear and penetrating the wheel through hole; the button column has a column connecting part connected with the retractable shell.

[0014] The button column includes two button petals and a column gap between the two button petals; the column connecting part includes two column clamping heads arranged on the button petals; the column clamping heads are formed on the outer peripheral surfaces of the button petals; the column clamping heads include a head clamping surface facing the button body, and a head inclined surface facing the opposite direction; the head inclined surface is gradually inclined toward the head clamping surface from the free end of the button column to the root.

[0015] The installation opening is provided with a toothed ring matched with the claw teeth; the toothed ring is located at the outer ring of the anti-rotation elastic claw, and the toothed ring includes a plurality of ring teeth surrounding the gear axis and facing the gear axis; the ring teeth are formed on the inner side wall of the installation opening;

[0016] The installation port includes a top cavity for accommodating the anti-rotation elastic claw, and a bottom cavity for accommodating the gear; the gear ring is formed in the top cavity, and the first inlet and outlet and the second inlet and outlet are located in the bottom cavity and connected to the bottom cavity; the retractable shell has a partition wall between the top cavity and the bottom cavity; the partition wall corresponds to the bottom surface of the elastic claw arm; the elastic claw arm is located between the partition wall and the button body.

[0017] A watch also includes a dial, the dial including a first dial connecting part connected to the first belt connecting part and a second dial connecting part connected to the second belt connecting part.

[0018] After adopting the above technical scheme, the knob-type retractable watch strap of the utility model breaks through the traditional watch strap structure and operation form, and can be connected to the dial as a watch strap. In actual use, the user rotates the driving knob in the tightening rotation direction to drive the gear to rotate, and the gear drives the first rack and the second rack on the opposite side to move synchronously towards each other, so that the overlapping part of the first belt body and the second belt body gradually becomes larger, and the watch strap as a whole becomes shorter, so that the watch strap can be tightened arbitrarily with high precision. At the same time, the anti-rotation elastic claw of the anti-rotation component uses the claw teeth to clamp on the corresponding part such as the ring teeth of the retractable shell to the gear. The user can rotate the driving knob in the direction of loosening to release the locking position of the anti-rotation component and drive the gear to rotate in the opposite direction. The gear drives the first rack and the second rack on the opposite side to move synchronously in the direction of separation, so that the overlapping part of the first belt body and the second belt body gradually becomes smaller, and the overall length of the strap becomes longer, so that the high-precision arbitrary loosening of the strap can be achieved. At the same time, the anti-rotation elastic claw of the anti-rotation component uses the claw teeth to clamp on the corresponding parts such as the ring teeth of the retractable shell to position the gear, so as to maintain the corresponding tightness of the strap. Compared with the prior art, the knob-type retractable strap of the utility model has the advantages of flexible and convenient high-precision adjustment of arbitrary tightness and strong practicality.

[0019] The watch of the utility model breaks through the structural form of traditional watches, and the watch strap has the advantages of flexible and convenient high-precision adjustment of any tightness and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0021] Figure 2 It is a side structural schematic diagram of the utility model;

[0022] Figure 3 It is a side sectional structural schematic diagram of the utility model;

[0023] Figure 4 It is a cross-sectional structural schematic diagram of the utility model from another angle;

[0024] Figure 5 It is a schematic diagram of the structure of the button body when viewed from above;

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure of the gear and the anti-rotation elastic claw;

[0026] Figure 7 It is a schematic diagram of the three-dimensional structure of the retractable shell;

[0027] Figure 8 It is a schematic diagram of the top view of the retractable shell structure;

[0028] Fig. 9It is a side structural schematic diagram of the utility model in the use state connected with the dial;

[0029] Fig.10 It is a three-dimensional structural schematic diagram of the utility model in the use state connected with the dial;

[0030] Fig.11 for Figure 3 Schematic diagram of the enlarged structure of part A in the figure.

[0031] In the figure:

[0032] 1-first belt body, 11-first belt connecting portion, 12-first rack, 2-second belt body, 21-second belt connecting portion, 22-second rack;

[0033] 3-retractable and retractable adjusting device, 31-retractable and retractable shell, 311-toothed ring, 312-partition wall, 32-driving knob, 321-gear, 3211-anti-rotation elastic claw, 32111-elastic claw arm, 32112-claw teeth, 3212-claw ring, 3213-claw connecting part, 3214-wheel through hole, 322-button body, 323-button protrusion, 324-button column, 3242-button petal, 3243-column gap, 3244-column clamp, 331-switch main driving part, 3311-driving inclined surface, 332-switch driven part;

[0034] 4- Watch face. DETAILED DESCRIPTION

[0035] In order to further explain the technical solution of the present utility model, it is described in detail through specific embodiments below.

[0036] The utility model discloses a knob-type retractable watch strap, such as Figure 1-11As shown, it includes a first belt body 1 connected to one side of the dial 4 and a second belt body 2 connected to the other side of the dial 4, the first belt body 1 has a first belt connecting portion 11 connected to the dial 4, and the second belt body 2 has a second belt connecting portion 21 connected to the dial 4; it also includes a retracting and extending adjustment device 3 for retracting and extending the first belt body 1 and the second belt body 2; the first belt body 1 and the second belt body 2 are overlapped and have an overlapping area, the first belt body 1 has a first overlapping section overlapping with the second belt body 2, and the second belt body 2 has a second overlapping section overlapping with the first overlapping section; the retracting and extending The adjusting device 3 includes a retractable shell 31 for accommodating the first overlapping section and the second overlapping section, and a driving knob 32 for driving the first overlapping section and the second overlapping section to move in opposite directions so that the first belt body 1 and the second belt body 2 enter and exit the retractable shell 31; the retractable shell 31 includes a first inlet and outlet for the first overlapping section to enter and exit, a second inlet and outlet for the second overlapping section to enter and exit, and a mounting port for installing the driving knob 32; the first inlet and outlet, the second inlet and outlet and the mounting port are connected; the first belt body 1 is provided with a first rack 12, the second belt body 2 is provided with a second rack 22, and the driving knob 32 is provided with a first rack 12. The button 32 is provided with a gear 321 meshed with the first rack 12 and the second rack 22 and a button body 322 driving the gear 321 to rotate; the gear 321 is located between the first rack 12 and the second rack 22, the tooth tips of the first rack 12 and the second rack 22 are arranged facing each other, the first rack 12 and the second rack 22 are located on both sides of the gear 321 and meshed with the gear 321 respectively; the gear 321 is provided with a rotation-stopping component to prevent the gear 321 from reversing; the rotation-stopping component includes a rotation-stopping elastic claw 3211, and the rotation-stopping elastic claw 3211 includes an elastic claw Arm 32111 and claw teeth 32112 arranged at the free end of the elastic claw arm 32111; the gear 321 has a tightening rotation direction of tightening the first belt body 1 and the second belt body 2, and a loosening rotation direction of loosening the first belt body 1 and the second belt body 2; the elastic claw arm 32111 extends from the fixed end to the free end in the loosening rotation direction; with the rotation center of the driving knob 32 as a reference, the elastic claw arm 32111 has a tension toward the outer circle and toward the inner wall of the installation port, and the claw teeth 32112 are formed on the outside of the free end of the elastic claw arm 32111.The utility model can be used as a watch strap and connected to the dial 4 through the first strap connection part 11 and the second strap connection part 21. In actual use, the user rotates the driving knob 32 in the tightening rotation direction to drive the gear 321 to rotate, and the gear 321 drives the first rack 12 and the second rack 22 on the opposite side to move synchronously toward each other, so that the overlapping part of the first strap body 1 and the second strap body 2 gradually becomes larger, and the strap as a whole becomes shorter, so that the strap can be tightened arbitrarily with high precision. At the same time, the anti-rotation elastic claw 3211 of the anti-rotation component uses the claw teeth 32112 to clamp the gear 321 on the corresponding part such as the ring teeth of the retractable shell 31, thereby positioning the gear 321, thereby realizing The corresponding tightness of the watchband is now maintained; on the contrary, the user releases the blocking position of the anti-rotation component by rotating the driving knob 32 in the direction of loosening rotation, and drives the gear 321 to rotate in the opposite direction. The gear 321 drives the first rack 12 and the second rack 22 on the opposite side to move synchronously in the direction away from each other, so that the overlapping part of the first belt body 1 and the second belt body 2 gradually becomes smaller, and the watchband becomes longer as a whole, so as to achieve high-precision arbitrary loosening of the watchband. At the same time, the anti-rotation elastic claw 3211 of the anti-rotation component uses the claw teeth 32112 to clamp the corresponding part such as the ring teeth of the retractable shell 31 to position the gear 321, thereby maintaining the corresponding tightness of the watchband. The claw teeth 32112 cooperate with the ring teeth of the retractable shell 31 under the elastic force of the elastic claw arm 32111 to achieve positioning. When the claw teeth 32112 and the ring teeth have matching inclined surfaces and clamping surfaces, they can be relatively rotated in the corresponding clockwise direction, and the opposite clockwise direction will be relatively blocked. The specific structure may be that the first belt body 1 is formed with a first strip hole extending along the length direction of the first belt body 1, and the second belt body 2 is formed with a second strip hole extending along the length direction of the second belt body 2; one side of the first strip hole has a first toothed edge extending along the length direction of the first belt body 1, and the other side of the first strip hole has a first toothless edge extending along the length direction of the first belt body 1, and the second strip hole has a second toothless edge corresponding to the first toothed edge and a second toothed edge corresponding to the first toothless edge; the first rack 12 is formed on the first toothed edge and corresponds to the second toothless edge, and the second rack 22 is formed on the second toothed edge and corresponds to the first toothless edge; the retractable shell 31 has a receiving cavity for accommodating the gear 321; the sum of the thickness of the first rack 12 and the second rack 22 is less than or equal to the thickness of the gear 321; the receiving cavity is provided with a first abutting wall abutting the first toothed edge and a second abutting wall abutting the second toothed edge. The first strip hole and the second strip hole are closed. The axis of the gear 321 is perpendicular to the plane where the first belt body 1 and the second belt body 2 are located.The first rack 12 is formed in the first strip hole, and the second rack 22 is formed in the second strip hole, which can ensure the strength and integrity of the first belt body 1 and the second belt body 2; at the same time, the axis of the gear 321 is perpendicular to the plane where the first belt body 1 and the second belt body 2 are located, and the first toothless edge and the second toothless edge can be limited on both sides of the gear 321 and ensure the meshing and stable operation of the gear 321 with the first rack 12 and the second rack 22; at the same time, the first abutting wall and the second abutting wall can respectively abut the first toothed edge and the second toothed edge to further ensure the meshing and stable operation of the gear 321 with the first rack 12 and the second rack 22. In order to further ensure the above effect, the teeth of the first rack 12 are closer to the gear 321 than the second toothless edge, and the teeth of the second rack 22 are closer to the gear 321 than the first toothless edge. The width of the first overlapping section and the second overlapping section is the same, so that the first overlapping section and the second overlapping section can be limited by the first inlet and outlet and the second inlet and outlet to guide the operation of the first belt body 1 and the second belt body 2. The specific structure can be that the button body 322 is provided with anti-skid stripes, and the anti-skid stripes are formed on the outer circumference of the button body 322, which is anti-skid and convenient for users to operate. The gear 321 and the anti-rotation elastic claw 3211 can be specifically made of POM material. The first belt body 1, the second belt body 2 and the retractable shell 31 can be specifically made of nylon material.

[0037] Preferably, the driving knob 32 includes a driving component for driving the anti-rotation elastic claw 3211; the driving component includes a button protrusion 323 arranged on the inner surface of the button body 322 (the surface of the button body facing the mounting port); with the rotation center of the driving knob 32 as a reference, the anti-rotation component also includes a claw ring 3212 that carries the anti-rotation elastic claw 3211 and is located in the inner circle of the anti-rotation elastic claw 3211, and the anti-rotation elastic claw 3211 is connected to the claw ring 3212 through a claw connecting portion 3213; the button protrusion 323 extends between adjacent claw connecting portions 3213; and there is a moving space between adjacent claw connecting portions 3213 for the button protrusion 323 to move in a tightening rotation direction or a loosening rotation direction. The driving knob 32 uses a driving component in the form of a button protrusion 323 to extend between adjacent claw connecting parts 3213. When the user rotates the button body 322 in the tightening rotation direction, the button body 322 drives the button protrusion 323 to drive the anti-rotation component to rotate in the tightening rotation direction, so that the gear 321 drives the first rack 12 and the second rack 22 on the opposite sides to move toward each other, so that the overlapping part of the first strap body 1 and the second strap body 2 gradually becomes larger, and the strap as a whole becomes shorter, thereby achieving high-precision arbitrary tightening of the strap. At the same time, the anti-rotation elastic claw 3211 of the anti-rotation component uses the claw teeth 32112 to clamp on the corresponding parts such as the ring teeth of the retractable shell 31 to position the gear 321, thereby maintaining the corresponding tightness of the strap; conversely, when the user rotates the button body 322 in the loosening rotation direction, the button body The body 322 uses the moving space between the adjacent claw connecting parts 3213 to realize a short-term independent rotation. During this independent rotation, the button body 322 does not drive the anti-rotation elastic claw 3211, but unlocks the snapping state of the claw teeth 32112 and the ring teeth. Then the button body 322 drives the button protrusion 323 to drive the anti-rotation component to rotate in the loosening rotation direction, so that the gear 321 drives the first rack 12 and the second rack 22 on the opposite side to move away from each other, so that the overlapping part of the first belt body 1 and the second belt body 2 gradually becomes smaller, and the overall length of the watchband becomes longer, so as to realize high-precision arbitrary loosening of the watchband. At the same time, the anti-rotation elastic claw 3211 of the anti-rotation component uses the claw teeth 32112 to clamp on the corresponding part such as the ring teeth of the retractable shell 31 to position the gear 321, thereby realizing the corresponding tightness of the watchband. The claw ring 3212 can position the anti-rotation elastic claw 3211 and ensure the strength of the anti-rotation component. The specific structure may be that the claw connection part 3213 extends from the inner ring to the outer ring and is connected between the fixed end of the anti-rotation elastic claw 3211 and the claw ring 3212. This structure can ensure the strength of the anti-rotation component and enable the anti-rotation component and the button protrusion 323 to have a reasonable matching structure and space.

[0038] Preferably, it also includes a driving switch for driving the claw teeth 32112 to disengage from the ring teeth; the driving switch includes a switch main driving part 331 arranged on the button body 322, and a switch driven part 332 arranged on the anti-rotation elastic claw 3211; the free end of the elastic claw arm 32111 has a claw top surface facing the button body 322, and a claw bottom surface facing the opposite direction; the switch main driving part 331 is a main driving recess formed on the inner surface of the button body 322, and the switch driven part 332 is a driven protrusion formed on the claw top surface and extending into the main driving recess. When the user operates the button body 322 to rotate in the loosening rotation direction, the main driving recess and the driven convex portion cooperate to extend into each other and form mutual interference in the rotation direction. When the button body 322 rotates, the main driving recess exerts a force on the driven convex portion to drive the claw tooth 32112 to move away from the ring tooth, thereby unlocking the gear 321. The first belt body 1 and the second belt body 2 move synchronously in the direction of separation, and the strap becomes longer as a whole, thereby achieving high-precision arbitrary loosening of the strap. When the user stops rotating the button body 322, the anti-rotation elastic claw 3211 of the anti-rotation component swings toward the outer circle by relying on its own elasticity, and the claw tooth 32112 is stuck on the corresponding position such as the ring tooth of the retractable shell 31 to position the gear 321, thereby maintaining the corresponding tightness of the strap. The specific structure may be that the driven protrusion is a protruding column formed on the top surface of the claw, and the main driving recess is a groove formed on the inner surface of the button body 322; the main driving recess has a tightening recess end facing the tightening rotation direction and a relaxing recess end facing the relaxing rotation direction, and with the rotation center of the driving knob 32 as a reference, the main driving recess has a driving inclined surface 3311 which is located in the outer ring of the driven protrusion and drives the driven protrusion toward the inner ring, and the driving inclined surface 3311 is gradually inclined toward the inner ring from the relaxing recess end to the tightening recess end; with the rotation center of the driving knob 32 as a reference, the main driving recess has an inner ring groove wall which is located in the inner ring of the driven protrusion, and the inner ring groove wall has a swinging space between the relaxing recess end and the driven protrusion for the driven protrusion to move toward the inner ring. When the user operates the button body 322 to rotate in the direction of loosening, the driving inclined surface 3311 of the main driving recess applies pressure toward the inner ring to the driven convex portion, so that the claw teeth 32112 swing toward the inner ring by relying on the elasticity of the anti-rotation elastic claw 3211 and then disengage from the engagement with the ring teeth, thereby unlocking the gear 321. The first belt body 1 and the second belt body 2 move synchronously in the direction of moving away, and the watch strap becomes longer as a whole, thereby achieving high-precision arbitrary loosening of the watch strap. When the user stops rotating the button body 322, the anti-rotation elastic claw 3211 of the anti-rotation component swings toward the outer ring by relying on its own elasticity, and the claw teeth 32112 are stuck on the corresponding parts such as the ring teeth of the storage shell 31 to position the gear 321. The swinging space between the inner ring groove wall at the end of the loosening recess and the driven convex portion serves as the swinging space for the anti-rotation elastic claw 3211 to drive the claw teeth 32112 to swing.In order to ensure the stability and reliability of the above structure, a more specific structure may be that the free end of the elastic claw arm 32111 has a claw head forming a driven convex part, and the claw head protrudes toward the inner circle; the claw teeth 32112 are formed on the outer circle side of the claw head; the driven convex part is formed on the claw top surface of the claw head. In order to ensure smooth cooperation between the driven convex part and the main driving concave part, the driven convex part is cylindrical, the main driving concave part is roughly wedge-shaped, and each angle of the main driving concave part is chamfered.

[0039] In another similar solution, the switch main driving part 331 is a main driving protrusion formed on the inner surface of the button body 322, and the switch driven part 332 is a driven concave formed on the top surface of the claw and into which the main driving protrusion extends. That is, the button body 322 drives the driven concave formed on the top surface of the claw by using the main driving protrusion.

[0040] Preferably, the anti-rotation elastic claw 3211 is connected to the gear 321 to ensure the rotation consistency of the anti-rotation elastic claw 3211 and the gear 321. The anti-rotation component includes more than two anti-rotation elastic claws 3211 evenly arranged around the axis of the gear 321, and the free ends of each elastic claw arm 32111 face the same direction. This structure can ensure that the anti-rotation elastic claw 3211 is evenly positioned at multiple angles and directions to ensure the stability of the positioning. The specific structure can be that three or four anti-rotation elastic claws 3211 are evenly arranged around the axis of the gear 321. In order to further ensure the consistent rotation strength of the anti-rotation elastic claw 3211 and the gear 321, the anti-rotation elastic claw 3211 is integrally injection molded with the gear 321. The specific structure can be that the tip of the claw tooth 32112 faces the direction of loosening rotation, which can ensure that the positioning force of each claw tooth 32112 is in the same clockwise direction to ensure the positioning strength. In order to ensure the one-way locking function of the claw tooth 32112 and the claw tooth 32112 rotates in the tightening rotation direction along with the button body 322, the claw tooth 32112 includes a claw inclined surface facing the tightening rotation direction, and a claw clamping surface facing the loosening rotation direction; the claw inclined surface gradually tilts toward the loosening rotation direction from the root to the tip of the claw tooth 32112, and the angle between the claw inclined surface and the plane where the claw clamping surface is located is less than 90° (preferably 75°, 60° or 45°). Furthermore, the claw clamping surface gradually tilts toward the loosening rotation direction from the root of the claw tooth 32112 to the tip of the claw tooth 32112. This structure can ensure the locking strength of the claw clamping surface and the ring tooth, and is not easy to disengage. In order to further ensure the locking strength of the anti-rotation elastic claw 3211, the elastic claw arm 32111 is provided with two claw teeth 32112.

[0041] Preferably, the gear 321 has a wheel through hole 3214, and the button body 322 has a button column 324 facing the gear 321 and penetrating the wheel through hole 3214; the button column 324 has a column connection portion connected to the retractable shell 31. When the components are installed in place, the button body 322 is connected to the retractable shell 31 by the column connection portion of the button column 324 to achieve the positioning of the components, and the button column 324 penetrates the gear 321, which can make the rotation of the gear 321 and the anti-rotation elastic claw 3211 more stable and balanced.

[0042] Preferably, the retractable shell 31 has a connection hole for the button column 324 to be inserted and clamped; the button column 324 includes two button petals 3242 at the end and a column gap 3243 between the two button petals 3242; the column connection portion includes two column clamps 3244 provided on the button petals 3242; the column clamps 3244 are formed on the outer peripheral surface of the button petals 3242; the column clamps 3244 include a head clamping surface facing the button body 322, and a head inclined surface facing the opposite direction; the head inclined surface is gradually inclined toward the head clamping surface from the free end to the root of the button column 324. The diameter of the connection hole is smaller than the distance between the outer sides of the two button petals 3242, and the sum of the size of the column gap 3243 and the diameter of the connection hole is larger than the distance between the outer sides of the two button petals 3242, so as to ensure that the two button petals 3242 can pass through the connection hole after deformation. When the button column 324 uses the two button petals 3242 and the head inclined surface to extend into the connection hole of the retractable shell 31, the two button petals 3242 are squeezed by the connection hole and deformed to be close to each other by the column gap 3243. When the two button petals 3242 are reset to the direction away from each other after passing through the connection hole, the head clamping surface is clamped at the connection hole and axially limited, but it does not affect the rotation of the button column 324 and the entire button body 322. The specific structure can be that the button column 324 is formed with a thin diameter portion between the column clamping head 3244 and the root of the button column 324, and the thin diameter portion has a size for the edge of the connection hole of the retractable shell 31 to be clamped. This thin diameter portion can be matched with the edge of the connection hole of the retractable shell 31 for limiting. In order to ensure the elasticity of the button petal 3242, the inner end of the column gap 3243 is closer to the root of the button column 324 than the thin diameter portion. This structure can ensure that the button petal 3242 has a sufficient deformation length.

[0043] Preferably, the installation port is provided with a toothed ring 311 that matches with the claw teeth 32112; with the rotation center of the driving knob 32 as a reference, the toothed ring 311 is located on the outer ring of the anti-rotation elastic claw 3211, and the toothed ring 311 includes a plurality of ring teeth surrounding the axis of the gear 321 and facing the axis of the gear 321; the ring teeth are formed on the inner wall of the installation port. When the user rotates the button body 322 in the tightening direction, the button body 322 drives the button protrusion 323 to drive the anti-rotation component to rotate in the tightening direction, so that the gear 321 drives the first rack 12 and the second rack 22 on the opposite sides to move toward each other, so that the overlapping part of the first belt body 1 and the second belt body 2 gradually becomes larger, and the strap as a whole becomes shorter, so as to achieve high-precision arbitrary tightening of the strap. At the same time, the anti-rotation elastic claw 3211 of the anti-rotation component uses the claw teeth 32112 to clamp on the ring teeth of the gear ring 311 to position the gear 321, thereby maintaining the corresponding tightness of the strap; when the user operates the button body 322 to rotate in the loosening direction, the driving inclined surface 33 of the main drive recess is used to 11 applies pressure toward the inner ring on the driven convex portion, so that the claw tooth 32112 swings toward the inner ring due to the elasticity of the anti-rotation elastic claw 3211 and then disengages from the meshing with the ring teeth, thereby unlocking the gear 321. The first strap body 1 and the second strap body 2 move synchronously in the direction of moving away, and the strap as a whole becomes longer, thereby achieving high-precision arbitrary loosening of the strap. When the user stops turning the button body 322, the anti-rotation elastic claw 3211 of the anti-rotation component swings toward the outer ring due to its own elasticity, and the gear 321 is positioned by using the claw tooth 32112 to be stuck on the ring teeth of the gear ring 311. The swinging space between the inner ring groove wall at the end of the relaxing recess and the driven convex portion serves as the swinging space for the anti-rotation elastic claw 3211 to drive the claw tooth 32112 to swing. In order to ensure the one-way locking function of the claw teeth 32112 and the ring teeth and the rotation of the claw teeth 32112 along with the button body 322 in the tightening rotation direction, the ring teeth include a ring clamping surface facing the tightening rotation direction and a ring bevel facing the loosening rotation direction; the ring bevel gradually tilts toward the tightening rotation direction from the root of the tooth to the tip, and the angle between the ring bevel and the plane where the ring clamping surface is located is less than 90° (preferably 75°, 60° or 45°). Furthermore, the ring clamping surface gradually tilts toward the tightening rotation direction from the root of the ring teeth to the tip of the ring teeth. This structure can ensure the locking strength of the claw clamping surface and the ring teeth and is not easy to disengage. In order to ensure that the button column 324 and the gear 321 are stably matched perpendicularly to the first belt body 1 and the second belt body 2, the opening of the installation port is perpendicular to the plane where the first belt body 1 and the second belt body 2 are located.

[0044] Preferably, the installation port includes a top cavity for accommodating the anti-rotation elastic claw 3211, and a bottom cavity for accommodating the gear 321; the gear ring 311 is formed in the top cavity, and the first inlet and the second inlet are in the bottom cavity and communicated with the bottom cavity; the retractable shell 31 has a partition wall 312 between the top cavity and the bottom cavity; the partition wall 312 corresponds to the claw bottom surface of the elastic claw arm 32111; the elastic claw arm 32111 is between the partition wall 312 and the button body 322. The bottom cavity can limit the first belt body 1 and the second belt body 2 to ensure the smooth and stable operation of the first belt body 1 and the second belt body 2; the top cavity can accommodate or limit the anti-rotation elastic claw 3211 to ensure the smooth and stable operation of the anti-rotation elastic claw 3211; at the same time, the partition wall 312 can be used as a reinforcing rib of the retractable shell 31 to prevent the retractable shell 31 from being easily deformed and affecting the performance. In order to facilitate the installation and limiting of the gear 321, the middle part of the partition wall 312 has a wall through hole. In order to facilitate the rotation of the gear 321, the partition wall 312 is annular. The button body 322 has a button side wall facing the retractable shell 31, the button side wall is located on the outer ring of the gear ring 311, and the outer side of the button side wall is formed with anti-slip stripes. In order to facilitate the smooth and stable rotation of the button body 322, the retractable shell 31 has a supporting surface for supporting the button side wall.

[0045] A watch, such as Figure 1-11 As shown, it also includes a dial 4, which includes a first disk connection part connected to the first belt connection part 11 and a second disk connection part connected to the second belt connection part 21. The dial can be an electronic watch such as a smart watch and a children's watch, which is provided with a chip and a communication component inside. The first disk connection part has a snap-on structure that is snap-connected to the first belt connection part, and the second disk connection part has a snap-on structure that is snap-connected to the second belt connection part. In actual use, the user rotates the drive knob 32 in the tightening rotation direction to drive the gear 321 to rotate, and the gear 321 drives the first rack 12 and the second rack 22 on the opposite side to move toward each other synchronously, so that the overlapping part of the first belt body 1 and the second belt body 2 gradually increases, and the overall strap becomes shorter, so as to achieve high-precision arbitrary tightening of the strap. At the same time, the anti-rotation elastic claw 3211 of the anti-rotation component uses the claw teeth 32112 to clamp the gear 321 on the corresponding part such as the ring teeth of the retractable shell 31, thereby maintaining the corresponding tightness of the strap; on the contrary, use The person releases the locking position of the anti-rotation component by turning the driving knob 32 in the loosening rotation direction, thereby driving the gear 321 to rotate in the opposite direction. The gear 321 drives the first rack 12 and the second rack 22 on the opposite side to move synchronously in the direction away from each other, so that the overlapping part of the first strap body 1 and the second strap body 2 gradually becomes smaller, and the strap as a whole becomes longer, thereby achieving high-precision arbitrary loosening of the strap. At the same time, the anti-rotation elastic claw 3211 of the anti-rotation component uses the claw teeth 32112 to clamp on the corresponding parts such as the ring teeth of the retractable shell 31 to position the gear 321, thereby maintaining the corresponding tightness of the strap.

[0046] The product form of the utility model is not limited to the illustrations and embodiments of this case. Any appropriate changes or modifications made by anyone with similar ideas should be deemed to be within the patent scope of the utility model.

Claims

1. A knob-type retractable watch strap, comprising a first strap body connected to one side of a watch dial and a second strap body connected to the other side of the watch dial, wherein the first strap body has a first strap connection portion connected to the watch dial, and the second strap body has a second strap connection portion connected to the watch dial; characterized in that: The belt is configured to have a first portion that is adapted to move in and out of the belt, and a second ... The second rack, the driving knob is provided with a gear meshing with the first rack and the second rack and a button body driving the gear to rotate; the gear is located between the first rack and the second rack, and the first rack and the second rack are located on both sides of the gear and meshing with the gear respectively; the gear is equipped with a stop-rotation component to prevent the gear from reversing; the stop-rotation component includes an elastic stop-rotation claw, and the elastic stop-rotation claw includes an elastic claw arm and claw teeth arranged at the free end of the elastic claw arm; the gear has a tightening rotation direction for tightening the first belt body and the second belt body, and a loosening rotation direction for loosening the first belt body and the second belt body; the elastic claw arm extends from the fixed end to the free end in the loosening rotation direction; the elastic claw arm has a tension toward the outer circle and toward the inner wall of the mounting port, and the claw teeth are formed on the outside of the free end of the elastic claw arm.

2. The knob-type retractable watch strap according to claim 1, characterized in that: The driving knob includes a driving component for driving the anti-rotation elastic claw; the driving component includes a button protrusion arranged on the inner surface of the button body; the anti-rotation component also includes a claw ring that carries the anti-rotation elastic claw and is located in the inner circle of the anti-rotation elastic claw, and the anti-rotation elastic claw is connected to the claw ring through a claw connecting part; the button protrusion extends between adjacent claw connecting parts; and there is a moving space between adjacent claw connecting parts for the button protrusion to move in the tightening rotation direction or the loosening rotation direction.

3. The knob-type retractable watch strap according to claim 2, characterized in that: It also includes a driving switch for driving the claw teeth to disengage from the ring teeth; the driving switch includes a switch main driving part arranged on the button body, and a switch driven part arranged on the anti-rotation elastic claw; the free end of the elastic claw arm has a claw top surface facing the button body, and a claw bottom surface facing the opposite direction; the switch main driving part is a main driving recess or a main driving protrusion formed on the inner surface of the button body, and the switch driven part is a driven protrusion formed on the claw top surface and extending into the main driving recess, or a driven recess formed on the claw top surface and for the main driving protrusion to extend into.

4. The knob-type retractable watch strap according to claim 3, characterized in that: The driven protrusion is a protruding column formed on the top surface of the claw, and the main driving recess is a groove formed on the inner surface of the button body; the main driving recess has a tightening recess end facing the tightening rotation direction and a relaxing recess end facing the relaxing rotation direction, and the main driving recess has a driving inclined surface located in the outer ring of the driven protrusion and driving the driven protrusion toward the inner ring, and the driving inclined surface is gradually inclined toward the inner ring from the relaxing recess end to the tightening recess end; the main driving recess has an inner ring groove wall located in the inner ring of the driven protrusion, and the inner ring groove wall has a swinging space between the relaxing recess end and the driven protrusion for the driven protrusion to move toward the inner ring.

5. The knob-type retractable watch strap according to claim 4, characterized in that: The free end of the elastic claw arm has a claw head forming a driven convex portion, and the claw head protrudes toward the inner circle; claw teeth are formed on the outer circle side of the claw head; and the driven convex portion is formed on the claw top surface of the claw head.

6. The knob-type retractable watch strap according to any one of claims 1 to 5, characterized in that: The anti-rotation elastic claw is connected with the gear; the anti-rotation component comprises more than two anti-rotation elastic claws evenly arranged around the axis of the gear, and the free ends of the elastic claw arms face the same direction.

7. The knob-type retractable watch strap according to any one of claims 1 to 5, characterized in that: The gear has a wheel through hole, and the button body has a button column facing the gear and penetrating the wheel through hole; the button column has a column connecting part connected with the retractable shell.

8. The knob-type retractable watch strap according to claim 7, characterized in that: The button column includes two button petals and a column gap between the two button petals; the column connecting part includes two column clamping heads arranged on the button petals; the column clamping heads are formed on the outer peripheral surfaces of the button petals; the column clamping heads include a head clamping surface facing the button body, and a head inclined surface facing the opposite direction; the head inclined surface is gradually inclined toward the head clamping surface from the free end of the button column to the root.

9. The knob-type retractable watch strap according to any one of claims 1 to 5, characterized in that: The installation opening is provided with a toothed ring matched with the claw teeth; the toothed ring is located at the outer ring of the anti-rotation elastic claw, and the toothed ring includes a plurality of ring teeth surrounding the gear axis and facing the gear axis; the ring teeth are formed on the inner side wall of the installation opening; The installation opening includes a top cavity for accommodating the anti-rotation elastic claw, and a bottom cavity for accommodating the gear; The gear ring is formed in the top cavity, the first inlet and the second inlet are located in the bottom cavity and communicate with the bottom cavity; the retractable shell has a partition wall between the top cavity and the bottom cavity; the partition wall corresponds to the bottom surface of the claw of the elastic claw arm; The elastic claw arm is located between the partition wall and the button body.

10. A watch with a knob-type retractable strap according to any one of claims 1 to 9; characterized in that: Also included is a dial including a first dial connection portion connected to the first belt connection portion and a second dial connection portion connected to the second belt connection portion.

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