A linkage opening and closing structure and control method

Abstract

The application discloses a linkage opening and closing structure and a control method. The linkage opening and closing structure comprises a support main body, a driving piece, a first cover body, an intermediate transmission mechanism and a second cover body. The driving piece is rotatably connected to the support main body, and the first cover body is connected to the driving piece. The intermediate transmission mechanism is connected to the driving piece, and the second cover body is connected to the driving piece through the intermediate transmission mechanism. The driving piece has a first rotation stage and a second rotation stage. In the first rotation stage, the driving piece only drives the first cover body to rotate around a first direction. In the second rotation stage, the driving piece drives the second cover body to rotate around the reverse direction of the first direction through the intermediate transmission mechanism, so that the first cover body and the second cover body have a phase difference in the rotation process. The application can improve the convenience and efficiency of user operation, and has stable and reliable structure and low cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transmission devices, in particular to a linkage opening and closing structure and a control method. BACKGROUND

[0002] In the existing rotary opening and closing device, the cover plate structure of synchronous opening or sequential opening is generally adopted to realize the function of shielding or exposing the internal space, and is widely used in the fields of household appliances, mechanical equipment, electronic equipment and building decoration. Although such devices are relatively mature in function implementation, they still have many technical defects in actual use.

[0003] Among them, the synchronous opening mode requires multiple cover plates to rotate simultaneously under the action of the same driving source, which can realize rapid and unified opening and closing action, but the structure design is easy to cause jamming, shaking or even structural interference due to uneven force or transmission gap. On the other hand, the sequential opening reduces the instantaneous force by driving each cover plate to rotate in stages, but its control logic is complex, the cost is high, and the failure rate is relatively high.

[0004] In addition, whether it is synchronous or sequential opening, the existing rotary opening and closing device generally has unreasonable motion trajectory planning and high risk of space interference between cover plates during movement. Especially in the multi-cover plate linkage structure, if there is no effective guiding and limiting mechanism, it is easy to cause misalignment or collision during opening and closing, which affects the user experience and may cause damage to the equipment. SUMMARY

[0005] The main purpose of the present application is to provide a linkage opening and closing structure and a control method to improve the convenience and efficiency of user operation, and the structure is stable and reliable with low cost.

[0006] To achieve the above purpose, some embodiments of the present application provide a linkage opening and closing structure, comprising:

[0007] a support body;

[0008] a driving member rotatably connected to the support body;

[0009] a first cover body connected to the driving member;

[0010] an intermediate transmission mechanism connected to the driving member;

[0011] a second cover body connected to the driving member through the intermediate transmission mechanism;

[0012] The driving member has a first rotation stage and a second rotation stage. In the first rotation stage, the driving member only drives the first cover to rotate in the first direction. In the second rotation stage, the driving member drives the second cover to rotate in the reverse direction of the first direction through the intermediate transmission mechanism, so that the first cover and the second cover have a phase difference in the rotation process.

[0013] In some embodiments, the intermediate transmission mechanism comprises a transition member and a driven member. The transition member is adapted to be in motion association with the driving member. The driven member is in motion association with the transition member. The driven member is connected to the second cover.

[0014] In some embodiments, the driving member comprises a first gear. The transition member comprises a second gear and a transmission belt. The driven member comprises a third gear. The second gear is adapted to mesh with the first gear. The transmission belt meshes with the second gear and the third gear respectively.

[0015] In some embodiments, the first gear comprises a light axis segment and an engagement segment which are distributed circumferentially around an axis of the first gear. The engagement segment comprises teeth. The light axis segment is not provided with teeth. The second gear is adapted to mesh with the engagement segment only.

[0016] In some embodiments, in the first rotation stage, the light axis segment faces the second gear. An outer diameter of the light axis segment is smaller than a dedendum circle of the second gear, so that the second gear idles in the light axis segment. In the second rotation stage, the engagement segment faces the second gear, so that the second gear can mesh with the first gear.

[0017] In some embodiments, the light axis segment and the engagement segment are arranged in sequence circumferentially around the first direction. Together, they cover at least half of the circumference of the first gear. The corresponding central angle of the light axis segment is smaller than that of the engagement segment, so that the first gear idles in the second gear first and then meshes with the second gear in the rotation process.

[0018] In some embodiments, the gear ratio of the first gear to the second gear is an integer ratio. The integer ratio is greater than 1 and less than 5.

[0019] In some embodiments, the corresponding central angle of the light axis segment is 85°-90°. The corresponding central angle of the engagement segment is 90°-95°. The number of teeth of the first gear is twice the number of teeth of the second gear.

[0020] In some embodiments, the first gear is provided with a gearless zone circumferentially around the first gear. When the first cover and the second cover reach the fully open position driven by the first gear, the gearless zone is opposite to the second gear. The gearless zone abuts against the second gear to prevent the first gear from continuing to rotate, so that the first gear is in a self-locking state.

[0021] In some embodiments, the rotation axes of the first gear, the second gear and the third gear are coplanar. The rotation axis of the first cover coincides with the rotation axis of the first gear. The rotation axis of the second cover coincides with the rotation axis of the third gear.

[0022] The transmission belt is a synchronous belt, the second gear, the third gear and the synchronous belt have the same modulus, and the number of teeth of the second gear is equal to the number of teeth of the third gear.

[0023] The embodiments of the second aspect of the present application propose a control method for the linkage opening and closing structure of any of the above, the control method of the linkage opening and closing structure comprising:

[0024] Rotating the driving member in the first direction to make the first cover body open first;

[0025] Continuing to rotate the driving member in the first direction to make the intermediate transmission mechanism drive the second cover body to open.

[0026] In some embodiments, after the step of continuing to rotate the driving member in the first direction to make the intermediate transmission mechanism drive the second cover body to open, the method further comprises:

[0027] Reversely rotating the driving member in the first direction, the intermediate transmission mechanism drives the second cover body to rotate at a higher angular velocity than the first cover body to close first;

[0028] The first cover body follows the rotation of the second cover body at a lower angular velocity until both the first cover body and the second cover body return to the closed position.

[0029] According to the above embodiments, the present application has the following beneficial effects:

[0030] The linkage opening and closing structure comprises a support body, a driving member, a first cover body, an intermediate transmission mechanism and a second cover body. The driving member is rotatably connected to the support body, so that the driving member can rotate around its axis. The first cover body is directly connected to the driving member, so that when the driving member rotates, the first cover body also rotates. The intermediate transmission mechanism is connected to the driving member and transmits motion to the second cover body through the mechanism. The driving member has a first rotation stage and a second rotation stage. In the first rotation stage, the driving member only drives the first cover body to rotate, and the intermediate transmission mechanism does not participate in motion transmission. As the driving member continues to rotate into the second rotation stage, the driving member starts to drive the second cover body to rotate through the intermediate transmission mechanism, so that the first cover body and the second cover body are driven in sequence, which produces a phase difference between the first cover body and the second cover body, ensuring that the first cover body opens first, and then the second cover body starts to operate, effectively avoiding the mutual interference problem caused by the simultaneous operation of the two flaps. Specifically, the early opening of the first cover body provides space for the rotation of the second cover body, allowing the second cover body to rotate and expand without obstacles. This mechanism improves the convenience and efficiency of user operation, without the need for manual adjustment of the positions of the first cover body and the second cover body, achieving an automatic and smooth operation process.

[0031] In summary, the application integrates the driving member, the first cover body, the intermediate transmission mechanism and the second cover body on the same support body to form a simple linkage opening and closing system. The driving member can independently drive the first cover body to move in the first direction in one continuous rotation, and then reversely drive the second cover body to move through the intermediate transmission mechanism. The two cover bodies are always out of phase to avoid mutual interference. The existence of the phase difference makes the cover bodies not collide with each other during the movement, and the noise and wear are inhibited. Long-term operation can still maintain stable and quiet, improving the reliability and service life of the product. The application eliminates the independent limiting, buffering or sequential control parts that must be provided in the traditional structure, shortens the assembly chain, and reduces the overall thickness and weight. In addition, since the opening and closing actions are completed in sections, the load is dispersed to different time points, the required torque of the driving member is smaller, and the user only needs to rotate lightly with one hand to achieve reliable operation, which is light and not easy to jam.

[0032] Further, the application continuously arranges the idle travel area, the meshing area and the toothless limiting area on the same gear periphery, so that the idle travel, power transmission and rigid locking can be sequentially completed in one continuous rotation, thereby integrating the traditional multi-part sequential control, additional buckle and independent damping in the gear pair. The layout naturally produces the high-speed return movement of the second cover body before the first cover body when reversely closing due to the difference in the number of teeth, without the need for additional control elements to achieve anti-pinch, quietness and ultra-thinness, and is applicable to various sizes in a modular form, reducing the types of parts and mold costs, forming a platformable mechanical control strategy.

[0033] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following description, or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the structures shown in the drawings without creative labor.

[0035] Figure 1 It is a perspective structural schematic view of the linkage opening and closing structure in an embodiment of the present application when viewed along a first visual angle;

[0036] Figure 2 It is a perspective structural schematic view of the linkage opening and closing structure in an embodiment of the present application when viewed along a second visual angle;

[0037] Figure 3 It is a perspective structural schematic view of the linkage opening and closing structure in an embodiment of the present application when viewed along a second visual angle; Figure 2 It is an enlarged view of A in the middle;

[0038] Figure 4A schematic view of a perspective structure of the linkage opening and closing structure in an embodiment of the present application when viewed along a third visual angle;

[0039] Figure 5 A schematic view of a perspective structure of the linkage opening and closing structure in an embodiment of the present application when viewed along a fourth visual angle;

[0040] Figure 6 A schematic view of a partial structure of the linkage opening and closing structure in an embodiment of the present application when viewed along a fifth visual angle;

[0041] Figure 7 A schematic view of a partial structure of the linkage opening and closing structure in an embodiment of the present application when viewed along a sixth visual angle;

[0042] Figure 8 A schematic view of a perspective structure of the linkage opening and closing structure in an embodiment of the present application when viewed along a seventh visual angle; Figure 7 An enlarged view of B in the middle;

[0043] Figure 9 A schematic view of a partial structure of the linkage opening and closing structure in an embodiment of the present application when viewed along a seventh visual angle;

[0044] Figure 10 An enlarged view of C in the middle; Figure 9 An enlarged view of C in the middle;

[0045] Figure 11 A flow chart of the control method in an embodiment of the present application.

[0046] Explanation of reference numerals:

[0047] Supporting body 100;

[0048] Driving member 200; knob 210; first gear 220; optical axis segment 221; meshing segment 222; tooth 2221; toothless area 223;

[0049] Intermediate transmission mechanism 300; transition member 310; second gear 311; transmission belt 312; driven member 320; third gear 321;

[0050] First cover 400;

[0051] Second cover 500.

[0052] The implementation, functional features and advantages of the present application will be further explained with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0053] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of the present application.

[0054] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0055] In addition, if the embodiments of the present application involve descriptions of “first”, “second”, etc., the descriptions of “first”, “second”, etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by “first”, “second” can explicitly or implicitly include at least one of the features. In addition, if “and / or”, “and / or” or “and / or” appears throughout the text, it means that the three parallel schemes are included, for example, “A and / or B” includes A scheme, or B scheme, or A and B are satisfied at the same time. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skill in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection required by the present application.

[0056] The linkage opening and closing structure and the control method according to the embodiments of the present application will be described below with reference to Figures 1 to 11 Figures 1 to 3 ​In some embodiments, the linkage opening and closing structure comprises a support body 100, a driving member 200, a first cover 400, an intermediate transmission mechanism 300 and a second cover 500. The driving member 200 is rotatably connected to the support body 100, so that the driving member 200 can rotate around its axis. The first cover 400 is directly connected to the driving member 200, so that when the driving member 200 rotates, the first cover 400 also rotates. The intermediate transmission mechanism 300 is connected to the driving member 200 and transmits motion to the second cover 500 through the mechanism. The driving member 200 has a first rotation stage and a second rotation stage. In the first rotation stage, the driving member 200 only drives the first cover 400 to rotate, and the intermediate transmission mechanism 300 does not participate in motion transmission. As the driving member 200 continues to rotate into the second rotation stage, the driving member 200 starts to drive the second cover 500 to rotate through the intermediate transmission mechanism 300, so that the first cover 400 and the second cover 500 are driven in sequence, which ensures that the first cover 400 opens first, and then the second cover 500 starts to act, effectively avoiding the mutual interference problem caused by the simultaneous operation of the two covers. Specifically, the early opening of the first cover 400 provides space for the rotation of the second cover 500, allowing the second cover 500 to rotate and expand without obstacles. This mechanism improves the convenience and efficiency of user operation, without the need for manual adjustment of the positions of the first cover 400 and the second cover 500, achieving automatic and smooth operation process.

[0057] In summary, the present application integrates the driving member 200, the first cover 400, the intermediate transmission mechanism 300 and the second cover 500 on the same support body 100, forming a simple linkage opening and closing system. The driving member 200 can independently drive the first cover 400 to move in the first direction in one continuous rotation, and then drive the second cover 500 to move through the intermediate transmission mechanism 300 in the opposite direction. The two covers are always out of phase, avoiding mutual interference. The existence of phase difference prevents the covers from colliding with each other during movement, noise and wear are suppressed, long-term operation can still be smooth and quiet, improving the reliability and service life of the product. The present application eliminates the need for independent limiting, buffering or sequential control parts that must be provided in traditional structures, shortens the assembly chain, reduces the overall thickness and weight. In addition, since the opening and closing actions are completed in stages, the load is dispersed to different time points, the required torque of the driving member 200 is smaller, and the user only needs to rotate it with one hand to achieve reliable operation, with a light and non-stuck hand feeling.

[0058] Further, the present application continuously arranges the idle area, the meshing area and the toothless limiting area on the same gear periphery, so that the idle rotation, power transmission and rigid locking can be sequentially completed in one continuous rotation, thereby integrating the traditional multi-part sequential control, additional buckle and independent damping in the gear pair. The layout naturally generates the high-speed return motion of the second cover 500 prior to the first cover 400 when reversely closed due to the difference in the number of teeth, without the need for additional control elements to achieve anti-pinch, silence and ultra-thin, and is suitable for various sizes in a modular form, reduces the types of parts and mold costs, and forms a platformable mechanical control strategy.

[0059] In some embodiments, the linkage opening and closing structure of the present application is used for a bar lamp, and the support body 100 can be a shell of the lamp, providing a stable mounting reference for the knob 210, the gear train and the two covers, and also serving as a heat dissipation and appearance part. The support body 100 can also be a shell of a handheld electric tool, accommodating a motor and a speed reduction mechanism inside and serving as a handle outside. In some embodiments, the support body 100 can be a body of a portable sound, integrally injection molded and provided with a rotating shaft hole and a wiring slot around. For household appliances, in some embodiments, the support body 100 can be a body frame of a coffee machine, made of aluminum alloy by pressure casting, bearing a brewing assembly and providing a rotating pivot for the opening and closing covers. In some embodiments, the support body 100 can also be an air outlet grille seat of an automotive interior, a gimbal base of a drone or a bottom shell of a small storage box, as long as it has a fixed driving element 200 and a cavity accommodating the linkage mechanism.

[0060] In some embodiments, the driving element 200 can be a knob 210, a hand wheel, a lever, an output shaft of an electric motor, a servo steering arm, a rotating shaft of a stepper motor, a rotating end of a linear push rod, etc. Any human-machine interaction element or power output element capable of producing continuous or segmented rotation around a shaft and outputting torque can be used as the driving element 200 of the present application. For example, when the driving element 200 is a knob 210, the rotating shaft of the knob 210 is directly fixed to the first gear 220, the meshing teeth of the first gear 220 are engaged with the second gear 311 of the intermediate transmission mechanism 300, and the second gear 311 transmits power to the third gear 321 through a synchronous belt or a chain, thereby driving the second cover 500 to rotate in reverse. When the driving element 200 is a lever, the swinging end of the lever is connected to the intermediate transmission mechanism 300 through a connecting rod and a cam slot, converts the swing into rotation, and then outputs through the gear pair to realize the phase difference opening and closing of the two covers.

[0061] In some embodiments, the intermediate transmission mechanism 300 can be a gear pair, a synchronous belt train, a chain wheel and chain, etc.

[0062] In some embodiments, the relative position relationship between the first cover 400 and the second cover 500 is adjusted. For example, they are arranged in a non-coplanar layout, so that physical collision between the two can be avoided even in very compact space. In addition, by fine-tuning the gear ratio of the intermediate transmission mechanism 300, the speed and sequence of opening of the two baffles can be flexibly set according to actual needs, so as to meet the needs of diversified application scenarios. For example, if it is desired that the second cover 500 reaches the fully open state faster than the first cover 400, the number of teeth of the relevant gears in the intermediate transmission mechanism 300 can be appropriately reduced to speed up the response speed of the second cover 500.

[0063] With reference to Figures 5 to 8 In some embodiments, the intermediate transmission mechanism 300 includes a transition piece 310 and a driven piece 320, the transition piece 310 is adapted to be in motion association with the driving piece 200, and the driven piece 320 is in motion association with the transition piece 310, and the driven piece 320 is connected to the second cover 500. By simplifying the intermediate transmission mechanism 300 into two stages of transmission between the transition piece 310 and the driven piece 320, the entire power link is compressed into the shortest path, the number of parts is reduced, the assembly process is lowered, and the overall structure is more compact. The motion association between the transition piece 310 and the driven piece 320 adopts pure mechanical coupling, without the need for additional fastening or positioning elements to ensure synchronization accuracy, and can still maintain stable phase difference output after long-term operation. This arrangement allows the impact load during the opening and closing of the cover to be gradually absorbed by the two-stage flexible transmission, reducing the instantaneous torque peak value, thereby reducing the wear of the driving piece 200 and prolonging the service life. At the same time, the standardized interface design of the transition piece 310 and the driven piece 320 allows quick replacement of transmission elements of different specifications in the same support body 100, providing an extensible mechanical foundation for subsequent platform expansion.

[0064] It can be understood that in some embodiments, in addition to the basic transmission assembly, additional auxiliary devices can be added to enhance the function of the intermediate transmission mechanism 300. For example, a clutch mechanism is introduced, which can automatically disconnect or connect the power transmission path between the driving piece 200 and the transition piece 310 under certain conditions. This allows the user to interrupt or resume the action of a certain baffle at any time according to actual needs, greatly improving flexibility. For example, when changes in the external environment are detected (such as suddenly encountering an obstacle), the system can quickly respond and temporarily stop the opening process of the second cover 500, and then continue to execute the original plan after the situation returns to normal.

[0065] With reference to Figures 5 to 8In some embodiments, the driving member 200 comprises a first gear 220, the transition member 310 comprises a second gear 311 and a transmission belt 312, and the driven member 320 comprises a third gear 321. The second gear 311 is adapted to engage with the first gear 220, and the transmission belt 312 engages with the second gear 311 and the third gear 321 respectively. The first gear 220 is rotatably connected to the support body 100 and directly connected to the first cover 400, such that when the user rotates the knob 210, the first gear 220 drives the first cover 400 to rotate. The second gear 311 is designed to engage with the first gear 220 and transmit power to the third gear 321 through the transmission belt 312, and the third gear 321 is connected to the second cover 500. In the first rotation stage, i.e. the initial stage of the right rotation of the knob 210, the optical axis segment 221 is directed towards the second gear 311, which makes the first gear 220 only drive the first cover 400 to rotate, and the second gear 311 cannot engage with it and can only idle, thereby avoiding interference with the operation of the first cover 400. As the knob 210 continues to rotate to the right, the first gear 220 enters the second rotation stage, the engagement segment 222 of the first gear 220 contacts the second gear 311 and realizes effective power transmission, and the power indirectly drives the third gear 321 through the transmission belt 312, thereby driving the second cover 500 to open. Such a design ensures that the first cover 400 opens before the second cover 500, forming an orderly operation process.

[0066] In addition, the pure gear and belt composite transmission chain composed of the first gear 220, the second gear 311, the third gear 321 and the transmission belt 312 enables the power to complete deceleration, reversing and phase difference distribution in the same plane, and the entire mechanism only needs three axes to be positioned in the support body 100, with high space utilization. The coplanar arrangement of the three gear axes reduces the number of bearings and supports required by traditional multi-stage transmission, compresses the assembly process, shortens the tolerance chain, and still maintains accurate phase difference output during long-term operation.

[0067] Further, the modular gear belt assembly can be pre-assembled and embedded in the support body 100 as a whole, so that it does not need to be disassembled for maintenance, reduces maintenance costs, and provides a platform for the extension of devices of different sizes or load requirements.

[0068] In some embodiments, a pair of symmetrical slide rails are arranged on the inner cavity side wall of the support body 100, and a slidable tension seat is embedded in the slide rails. The tension seat is centrally provided with a third gear 321 and serves as a driven pulley. Threaded holes are formed on the back surface of the tension seat. A fine adjustment screw rod passes through the side wall of the support body 100 and is engaged with the threaded holes. The outer end of the screw rod is fixed with an adjustment knob 210, and the inner end of the screw rod is abutted against the bottom surface of the tension seat through a thrust bearing. Rotating the adjustment knob 210 can push the tension seat to move forward and backward along the slide rails, so as to increase or decrease the center distance between the second gear 311 and the third gear 321, and realize real-time tensioning or loosening of the synchronous belt. Elastic washers are arranged between the slide rails and the tension seat, which can absorb vibration and prevent loosening. A locking nut is sleeved on the screw rod, and the position can be locked after the adjustment is completed and the locking nut is tightened. This structure can complete the tensioning adjustment in a small space without disassembly, is suitable for synchronous belts of different lengths or thermal expansion and cold contraction, ensures that the gears are always in the best meshing state, maintains the phase difference accuracy and low-noise operation.

[0069] With reference to Figures 5 to 8 In some embodiments, the first gear 220 includes an optical axis segment 221 and an engagement segment 222 which are circumferentially distributed around the axis of the first gear 220. The engagement segment 222 includes teeth 2221, and the optical axis segment 221 is not provided with the teeth 2221. The second gear 311 is only adapted to engage with the engagement segment 222. The coaxial and integrated design of the optical axis segment 221 and the engagement segment 222 directly writes the sequential control function of the traditional independent cam, pawl or clutch piece into the outer periphery of the gear, so that the gear can first idle and then engage within one rotation, thereby automatically realizing the segmented actions of the first cover body 400 first and the second cover body 500 later, and establishing a stable phase difference without additional parts. The idle stage provides a zero-load starting interval for the driving member 200, reduces the starting torque, improves the single-handed operation comfort, and avoids damage to the tooth surface caused by instantaneous impact. Once the engagement segment 222 enters the working state, the power transmission is immediately effective, ensuring that the second cover body 500 starts to act at a predetermined angle. The switching between idling and engagement in the whole process is only completed by the gear itself, which eliminates the assembly error of external control elements and reduces the failure points in long-term operation. In addition, the structure only needs to be formed or simply turned once to form the optical axis and the teeth 2221, which is simple in process and low in cost.

[0070] With reference to Figures 5 to 8In some embodiments, in the first rotation stage, the light axis segment 221 is directed towards the second gear 311, and the outer diameter of the light axis segment 221 is smaller than the addendum circle of the second gear 311, so that the second gear 311 idles on the light axis segment 221, and in the second rotation stage, the meshing segment 222 is directed towards the second gear 311, so that the second gear 311 can mesh with the first gear 220. This design directly converts the difference in the outer diameters of the light axis segment 221 and the meshing segment 222 into a switch of the working state of the second gear 311. In the first rotation stage, the outer diameter of the light axis segment 221 is smaller than the addendum circle of the second gear 311, and a controllable gap is formed between the second gear 311 and the light axis segment 221, realizing zero-contact idling, and the starting torque of the driving member 200 is reduced, and a user can easily start it with one hand. At the same time, the idling stage provides a buffer window for the system, avoiding the impact and noise caused by instantaneous meshing. After entering the second rotation stage, the outer diameter of the meshing segment 222 returns to the normal addendum circle, and the second gear 311 immediately establishes reliable meshing with the first gear 220, and the power is instantly transmitted, and the second cover 500 immediately moves in the reverse direction. Since the switching between idling and meshing is completely determined by the change in the outer diameter, no additional clutch element is needed, which not only reduces the number of parts, but also eliminates the accumulation of assembly errors, making the entire opening and closing process more compact, stable and durable.

[0071] Referring to Figures 3 to 8 In some embodiments, the light axis segment 221 and the meshing segment 222 are arranged in sequence around the first direction, and together cover at least half of the circumference of the first gear 220, and the central angle corresponding to the light axis segment 221 is smaller than the central angle corresponding to the meshing segment 222, so that the first gear 220 idles before meshing with the second gear 311 during rotation. Arranging the light axis segment 221 and the meshing segment 222 in sequence along the circumference and occupying only part of the circumference of the first gear 220 makes the idle and meshing states compressed in the same rotation path, and the fixed rhythm of idling before meshing can be realized without additional clutch or buffer elements. Since the central angle of the light axis segment 221 is smaller than that of the meshing segment 222, the idling time is accurately limited, which not only ensures that the first cover 400 has sufficient independent travel, but also avoids operation delay caused by excessive idling. The meshing segment 222 occupies a larger arc length, which ensures sufficient and stable power transmission and reduces tooth surface impact. The overall layout is compact, and the gear body bears the timing control function, eliminating the need for cams, forks or dampers required in traditional solutions, reducing the number of parts and assembly errors, and improving transmission reliability and service life.

[0072] Referring to Figures 5 to 8In some embodiments, the gear ratio of the first gear 220 to the second gear 311 is an integer ratio, which is greater than 1 and less than 5, for example, the integer ratio can be 2, 3, or 4. Such a limitation of the integer ratio is to balance the structure and controllable function. Specifically, on the one hand, if the ratio is equal to 1, the two gears rotate at the same speed, and cannot form the phase difference required by the present scheme, and the mechanism loses its meaning. On the other hand, if the ratio reaches or exceeds 5, the size of the large gear will increase sharply, resulting in a simultaneous increase in overall thickness, weight, and cost, and in the manual knob 210 scenario, the torque is amplified too much, the user's hand feels heavy, and the convenience of single-handed operation is lost.

[0073] Referring to Figures 5 to 8 In some embodiments, the central angle corresponding to the optical axis segment 221 is 85°-90°, and the central angle corresponding to the meshing segment 222 is 90°-95°, for example, the central angle corresponding to the optical axis segment 221 is 90°, and the central angle corresponding to the meshing segment 222 is 90°, and the sum of the two is 180° to realize the switching from closing to laying. In addition, the number of teeth of the first gear 220 is twice the number of teeth of the second gear 311.

[0074] This embodiment is described by way of example with a specific implementation, for example, when the driving member 200 rotates clockwise from 0°, the optical axis segment 221 of the first gear 220 is opposite to the second gear 311 in the interval of 0°-90°, the second gear 311 idles, and all the torque is only transmitted to the first cover 400, so that the first cover 400 rotates synchronously with the first gear 220 by 90° to reach the half-open position. Continue to rotate to the interval of 90°-180°, the meshing segment 222 enters the working state, and the first gear 220 and the second gear 311 begin to mesh. Since the gear ratio is 2:1, the second gear 311 rotates in the opposite direction at twice the angular velocity of the first gear 220. While the driving member 200 walks through the remaining 90°, the second gear 311 together with the second cover 500 realizes 0°-180° reverse opening. Finally, the first cover 400 stops at the 180° fully open position, and the second cover 500 also stops at the 180° fully open position. They always maintain a 90° phase difference and reach the limit at the same time. The angle and the gear ratio are accurately coupled, and there is no interference throughout the process.

[0075] Referring to Figures 3 to 8In some embodiments, the first gear 220 is provided with a toothless area 223 circumferentially around the first gear 220. When the first cover 400 and the second cover 500 reach the fully open position, the toothless area 223 is opposite to the second gear 311. The toothless area 223 abuts against the second gear 311 to prevent the first gear 220 from continuing to rotate, so that the first gear 220 is in a self-locking state. The toothless area 223 is directly formed on the outer circumference of the first gear 220. When the two covers reach the fully open limit, the toothless area 223 is just facing the second gear 311. The tooth top of the second gear 311 abuts against the outer wall of the toothless area 223 rigidly, instantaneously blocking the torque path of continuous rotation, so that the first gear 220 automatically enters the self-locking state. Since the limiting function is completely borne by the gear body, there is no need to set a boss, a pin or an elastic stopper, the number of parts is further reduced, the assembly process is compressed, and the structure is more compact. At the same time, the rigid abutment eliminates the fatigue risk of the traditional elastic limiting element, and the zero backlash locking can still be maintained after long-term use. The opening and closing end points are stable and reliable, the durability and maintenance convenience of the system are improved.

[0076] In other embodiments, circumferentially alternating optical axis segments 221 and meshing segments 222 are arranged on the rim of the first gear 220, and a radially slidable centrifugal force locking wedge is additionally arranged beside it. When the user rotates the knob 210, the optical axis segments 221 are first aligned with the second gear 311, only driving the first cover body 400 to open, and continuing to rotate to the meshing segments 222 meshing with the second gear 311, driving the third gear 321 through the synchronous belt, thereby sequentially opening the second cover body 500. At the same time, the wedge is expanded by centrifugal force as the rotational speed increases, and is instantly clamped into the inner ring gear of the support body 100 to achieve 180° mechanical limiting, and the wedge retracts when reversed to unlock, completing closure. Regarding the centrifugal force locking wedge, specifically, the centrifugal force locking wedge is arranged on the end face of the first gear 220, the end face of the first gear 220 is provided with a radial sliding groove, the cross section of the sliding groove is dovetail-shaped, the root of the wedge is matched with the shape of the sliding groove, and the wedge can only slide radially along the sliding groove. The outer edge of the wedge is processed into a locking tooth, the shape of the locking tooth is consistent with the tooth shape of the inner ring gear of the support body 100, the addendum of the locking tooth is provided with a lead-in slope, the inner edge of the wedge is connected with a resilient sheet, the other end of the resilient sheet is fixed to the bottom of the sliding groove, and the elastic force of the resilient sheet pulls the wedge to the center of the gear, so that the locking tooth is hidden inside the gear profile. When the rotational speed of the first gear 220 gradually increases, the centrifugal force acting on the wedge overcomes the pulling force of the resilient sheet, the wedge slides outward along the sliding groove, the locking tooth protrudes and meshes with the inner ring gear, forming circumferential rigid limiting. The outer end of the sliding groove is provided with a shoulder, which limits the wedge from moving outward. The inner wall of the sliding groove is attached with a low-friction sheet, which ensures smooth sliding of the wedge. The end of the resilient sheet is provided with a limiting protrusion, which is matched with the recess of the side wall of the sliding groove, so that the wedge remains in the retracted state when it is static or at low speed. The wedge, the sliding groove, the resilient sheet, the shoulder and the low-friction sheet together form an integral whole, which is one-time formed on the first gear 220 or is split and press-fitted, forming a centrifugal force triggered locking unit without additional fasteners. The centrifugal force locking wedge automatically extends outward and meshes with the inner ring gear to achieve instantaneous rigid limiting as the rotational speed increases, and automatically retracts to unlock as the rotational speed decreases, thereby eliminating fixed blocks, simplifying the structure and improving opening and closing reliability and service life.

[0077] Referring to Figures 5 to 8In some embodiments, the rotation axes of the first gear 220, the second gear 311 and the third gear 321 are coplanar, the rotation axis of the first cover 400 coincides with the rotation axis of the first gear 220, and the rotation axis of the second cover 500 coincides with the rotation axis of the third gear 321. Arranging the three gear axes in the same plane and coaxially arranging the first cover 400 with the first gear 220 and the second cover 500 with the third gear 321 can shorten the spatial depth of the transmission chain, flatten the entire opening and closing mechanism in the cross section perpendicular to the rotation axis, and adapt to narrow or thin-walled devices. The coplanar layout eliminates redundant parts such as axial shims and spacer sleeves required by traditional multi-stage transmission, and only one alignment is required during assembly to complete positioning, so that the cumulative tolerance is compressed to the minimum, and the synchronization accuracy can still be maintained for a long time. Since all rotating parts are in the same plane, the support body 100 can be integrally formed, reducing welding or screw connection, which not only reduces the weight but also improves the structural rigidity. The flattened design also facilitates the arrangement of heat dissipation channels or cables in limited space, leaving room for subsequent functional expansion.

[0078] In some embodiments, the transmission belt 312 is a synchronous belt, the second gear 311, the third gear 321 and the synchronous belt have the same modulus, and the number of teeth of the second gear 311 is equal to the number of teeth of the third gear 321. Selecting a synchronous belt and making the second gear 311, the third gear 321 and the synchronous belt have the same modulus, and setting the number of teeth of the second gear 311 and the third gear 321 to be consistent, can ensure that the belt teeth and gear teeth maintain zero slip transmission on the full meshing line. The most direct benefit brought by this is the long-term stability of the phase difference. Regardless of environmental temperature changes or load fluctuations, the angular displacement of the second gear 311 and the third gear 321 is always strictly synchronized, and the relative position error between the first cover 400 and the second cover 500 is suppressed to the minimum, and the opening and closing rhythm will not drift due to belt elongation or tooth surface wear. The same modulus design also simplifies spare parts management, and only one tooth shape cutter is needed to machine all pulleys during manufacturing, so that the inventory type and tooling cost are reduced simultaneously. Since the synchronous belt has flexibility and high rigidity, the operating noise is extremely low, and no lubrication is required, which not only reduces the maintenance frequency, but also avoids potential contamination of internal electronic components. In addition, the equal number of teeth further eliminates the speed ratio error source, so that the power transmission efficiency is always kept at a high level, providing a quiet, clean, efficient and repeatable linkage opening and closing experience for the entire machine.

[0079] In some embodiments, the application introduces magnetic elements. Specifically, a pair of coaxially arranged annular magnets are arranged between the first gear 220 and the second gear 311, the two magnets are radially magnetized and have the same polarity, the end surface of the first gear 220 extends an annular flange, the flange inlaid the first magnet, the end surface of the second gear 311 extends an annular flange, the flange inlaid the second magnet, a small air gap is left between the two magnets, the end surface of the first gear 220 is also provided with a limiting groove, and an elastic slide pin is installed in the limiting groove, the slide pin abuts against the positioning recess of the support body 100 under the repulsion of the magnets, forming a stable low potential position. When the knob 210 drives the first gear 220 to rotate to the optical axis segment 221 aligned with the second gear 311, the repulsion between the magnets will lock the first gear 220 at the optical axis position, and after continuing to rotate beyond the critical angle, the repulsion direction changes suddenly, the magnets generate a power torque, so that the first gear 220 quickly enters the meshing position, and the slide pin slides into the next positioning recess, forming a new stable state. The bistable torque provided by the magnets makes the feel obvious at the critical point, and the user can perceive the baffle switching without visual inspection. The combination of repulsion and positioning recess ensures that the first gear 220 does not vibrate at low speed or at rest, thereby avoiding half-meshing abnormal sound. At the same time, the magnetic power torque reduces the required operation torque, and improves the smoothness and comfort of single-handed operation.

[0080] Referring to Figures 1 to 11 Embodiments of the second aspect of the application propose a control method for the linkage opening and closing structure of any of the above, referring to Figure 11 The control method comprises:

[0081] S101: rotating the driving member 200 in the first direction to make the first cover body 400 open first;

[0082] S103: continuing to rotate the driving member 200 in the first direction to make the intermediate transmission mechanism 300 drive the second cover body 500 to open.

[0083] "Rotating the driving member 200 in the first direction to make the first cover body 400 open first" is the idle start, at this time the driving member 200 is only directly coupled with the first cover body 400, and the intermediate transmission mechanism 300 is still in the disengaged or idling state, so that all the torque is used to overcome the inertia and static friction of the first cover body 400, the starting torque is small and the feel is light, the user can quickly complete the initial opening with one hand, and the instantaneous peak load caused by the simultaneous movement of the two cover bodies is avoided.

[0084] The movement of the second cover 500 being opened by the intermediate transmission mechanism 300 when the driving member 200 continues to rotate in the first direction is a movement after engagement. When the driving member 200 rotates through a predetermined angle, the intermediate transmission mechanism 300 immediately enters the working state, and the remaining torque is transmitted to the second cover 500 in the form of reverse movement. The second cover 500 immediately expands in the opposite direction of the first cover 400, and the rotation of the second cover 500 and the rotation of the first cover 400 have a phase difference and do not interfere with each other. Since the two actions seamlessly connect in the same rotation direction, the user does not need to change the force direction or pause, and the entire operation is coherent and intuitive. At the same time, the torque requirements of the two strokes are staggered in the time axis. When the second cover 500 mainly tends to rise and turn, the first cover 400 has already fallen and turned from 90° to 180°. The driving member 200 is always in a low-load working condition, which reduces wear and prolongs the service life. This method completes the sequential opening and closing in a pure mechanical way without electronic control and additional clutch elements, simplifies the control system and assembly process, and provides an efficient and reliable execution strategy for ultra-thin and lightweight design.

[0085] In some embodiments, after the step of continuing to rotate the driving member 200 in the first direction to drive the second cover 500 to open by the intermediate transmission mechanism 300, the method further comprises:

[0086] S201: Reverse rotation of the driving member 200 in the first direction, the intermediate transmission mechanism 300 drives the second cover 500 to rotate at a higher angular velocity than the first cover 400 to close in advance;

[0087] S203: The first cover 400 follows the rotation of the second cover 500 at a lower angular velocity until the first cover 400 and the second cover 500 both return to the closed position.

[0088] Taking the design that the central angle corresponding to the light axis segment 221 of the first gear 220 is 90°, the central angle corresponding to the meshing segment 222 is 90°, and the number of teeth of the first gear 220 is twice the number of teeth of the second gear 311 as an example. Regarding the reverse rotation of the driving member 200 in the first direction, the driving member 200 immediately enters the reverse stroke, the intermediate transmission mechanism 300 switches the power direction, and the second cover 500 obtains a higher angular velocity rate to rotate in advance. In a very short time, the second cover 500 completes its own closing, and this "fast" action effectively avoids interference with the first cover 400 in the closing path, ensuring a smooth closing process without jamming.

[0089] The "first cover 400 follows rotation at a lower angular velocity" utilizes the speed ratio characteristics of the transmission chain to significantly lag the closing action of the first cover 400 behind the second cover 500, so that it continues to rotate and finally returns to the home position after the second cover 500 has been completely closed, thereby forming a "fast first and slow later" differential closing sequence. This differential sequence not only eliminates the impact sound and impact load that may be generated during traditional synchronous closing, but also reduces the peak torque at the end of closing, so that the user can complete the closing with one hand throughout the whole process by simply rotating the driving member 200, and the operation feels light and consistent. The whole closing process is completed in a single reverse rotation action, without the need for additional clutch or delay elements, further simplifying the structure and reducing the cost, and providing a stable and replicable mechanical control strategy for subsequent modular expansion of different sizes or loads.

[0090] In summary, the linkage opening and closing structure of the present application is described in a specific embodiment. Specifically, the linkage opening and closing structure as a whole comprises a support body 100, a knob 210 type driving member 200, a first cover 400, a second cover 500 and an intermediate transmission mechanism 300. The support body 100 serves as a lamp body shell, and has three coaxial holes reserved inside for positioning the first gear 220, the second gear 311 and the third gear 321, so that the three rotation axes are coplanar and maintain a fixed center distance, reducing the number of assembly layers. The knob 210 and the first gear 220 are pressure-fitted without gap through a D-shaped shaft hole, rotating smoothly without looseness; the outer periphery of the first gear 220 is provided with an optical axis section 221 and an engagement section 222 in sequence, the optical axis section 221 is toothless, and the engagement section 222 has a module of 0.5 and 30 teeth. The second gear 311 and the third gear 321 both have 15 teeth and a module of 0.5, and are connected through a synchronous belt to achieve a 1:2 speed reduction reverse transmission. The synchronous belt has the same module as the gears to ensure zero slip and long-term stability of the phase difference.

[0091] In actual operation, the knob 210 is rotated clockwise from 0°. In the 0°-85° stage, the optical axis section 221 is directly opposite the second gear 311, the second gear 311 idles, and only the first cover 400 is opened 85° synchronously with the first gear 220; continue to rotate to 85°-180°, the engagement section 222 begins to engage with the second gear 311, the second gear 311 reversely rotates 180° at twice the angular velocity, driving the second cover 500 to reversely open 180°, at this time the first gear 220 has rotated 180°, the toothless area 223 is directly opposite the second gear 311, the tooth top of the second gear 311 abuts against the outer wall of the toothless area 223, achieving 180° mechanical limiting, the knob 210 cannot continue to rotate in the same direction, and the full opening is completed. When reversely rotating, the second gear 311 first returns at twice the angular velocity, the second cover 500 is closed first, and the first cover 400 is closed later at the original speed, the two covers almost simultaneously return to the 0° closed position, and the whole process is free of interference and impact.

[0092] The linkage opening and closing structure of the present application integrates the functions of sequential control, angle limiting and self-locking in the gear body through the gear ratio of 2:1 and the design of circular angle partition, cancels the traditional cam, buckle or damper, greatly reduces the number of parts, reduces the assembly time by half, and greatly compresses the thickness. In addition, the present application adopts aluminum or stainless steel material to ensure strength and heat dissipation. In some embodiments, the third gear 321 is wrapped with a silica gel protective sleeve to prevent hand clamping and shield the screws, and the appearance is simple. The handle and the knob 210 are arranged on the same side, whether the lamp body is upward or downward, a single hand can operate, and the left and right hands are universal. In some embodiments, referring to Figure 9 and Figure 10 , the support body 100 and the synchronous belt leave a gap of 0.5mm, preventing friction damage. The overall scheme can be modularized and disassembled as a whole, suitable for lamps, handheld tools, storage boxes and other scenes, realizing a linkage opening and closing platform with low cost, high reliability and ultra-thin.

[0093] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation made under the inventive concept of the present application, using the contents of the present application specification and drawings, or directly / indirectly applied in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A linkage opening and closing structure characterized by comprising: The utility model relates to a cover driving device, including: Supporting body; Driving piece rotatably connected with the supporting body; First cover body connected with the driving piece; Intermediate transmission mechanism connected with the driving piece; Second cover body connected with the driving piece through the intermediate transmission mechanism; Wherein, the driving piece has first rotation stage and second rotation stage, at the first rotation stage, the driving piece only drives the first cover body to rotate around the first direction, at the second rotation stage, the driving piece drives the second cover body to rotate around the reverse direction of the first direction through the intermediate transmission mechanism, makes the first cover body and the second cover body exist phase difference in the rotation process; The intermediate transmission mechanism includes transition piece and driven piece, the transition piece is suitable for motion association with the driving piece, the driven piece is motion association with the transition piece, and the driven piece is connected with the second cover body; The driving piece includes first gear, the transition piece includes second gear and transmission belt, the driven piece includes third gear, the second gear is suitable for meshing with the first gear, and the transmission belt is meshed with the second gear and the third gear respectively; The first gear includes the light axis segment and the meshing segment that are distributed circumferentially around the own axis, the meshing segment includes the tooth, and the light axis segment is not provided with tooth, and the second gear is only suitable for meshing with the meshing segment; At the first rotation stage, the light axis segment is towards the second gear, and the outer diameter of the light axis segment is less than the dedendum circle of the second gear, so that the second gear idles at the light axis segment, and at the second rotation stage, the meshing segment is towards the second gear, so that the second gear can mesh with the first gear; The light axis segment and the meshing segment are sequentially arranged around the circumference of the first direction, and the two jointly cover at least half circumference of the first gear, and the corresponding central angle of the light axis segment is less than the corresponding central angle of the meshing segment, so that the first gear idles with the second gear first and then meshes with the second gear in the rotation process; The first gear is provided with a gearless area around the circumference, when the first gear drives the first cover body and the second cover body to reach the full opening position, the gearless area is opposite to the second gear, the gearless area abuts against the second gear to prevent the first gear from continuing to rotate, so that the first gear is in the self-locking state.

2. The linkage structure according to claim 1, wherein The gear number ratio of the first gear and the second gear is an integer ratio, and the integer ratio is greater than 1 and less than 5.

3. The linkage structure according to claim 1, wherein The corresponding central angle of the light axis segment is 85-90 DEG, the corresponding central angle of the meshing segment is 90-95 DEG, and the gear number of the first gear is twice the gear number of the second gear.

4. The linkage structure according to claim 1, wherein The rotation axes of the first gear, the second gear and the third gear are coplanar, the rotation axis of the first cover body coincides with the rotation axis of the first gear, the rotation axis of the second cover body coincides with the rotation axis of the third gear, and / or The transmission belt is a synchronous belt, the second gear, the third gear and the synchronous belt have the same modulus, and the gear number of the second gear is equal to the gear number of the third gear.

5. A control method characterized by, The control method of the linkage opening and closing structure according to any one of claims 1-4 comprises: rotating the driving member in the first direction to make the first cover body open first; continuing to rotate the driving member in the first direction to make the intermediate transmission mechanism drive the second cover body to open.

6. The control method according to claim 5, characterized by after the step of continuing to rotate the driving member in the first direction to make the intermediate transmission mechanism drive the second cover body to open, further comprising: rotating the driving member in the reverse direction of the first direction, the intermediate transmission mechanism drives the second cover body to rotate back at a higher angular velocity than the first cover body to close first; the first cover body follows the rotation back of the second cover body at a lower angular velocity until the first cover body and the second cover body are both back to the closed position.

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