A control mechanism

Abstract

This utility model discloses a control mechanism, including a control component and at least two transmission components. The control component has the same number of control slots as the transmission components. One connecting part of the transmission component is located in the control slot, and the other connecting part is used to connect to the controlled component. The control slot has a connected stationary section and an active section. When the control component moves, the position of the connecting part of the transmission component changes within the slot: when it is in the stationary section, the transmission component is stationary; when it is in the active section, the transmission component moves. Because each active section is located in a different position in the corresponding control slot, the movement of the control component can cause the transmission components to move in different sequences, satisfying the sequence requirements of the controlled component or gear switching. This mechanism has a simple structure, low cost, and small size, and is suitable for various scenarios, especially for controlling movable furniture.

Description

Technical Field

[0001] This utility model relates to the field of furniture, and in particular to a control mechanism. Background Technology

[0002] In the field of mechanical control, especially in scenarios such as movable furniture that require the sequential linkage of multiple components, how to achieve orderly control of transmission components through a simple structure is the key to improving equipment performance and reducing costs. However, existing multi-transmission component control mechanisms generally suffer from problems such as complex structure, cumbersome operation and poor adaptability, making it difficult to meet the needs of efficient and low-cost control.

[0003] Traditional solutions for achieving sequential movement of multiple transmission components often rely on complex gear sets, camshafts, or electrical control systems. For example, using multi-stage gear meshing to achieve timing control of transmission components not only requires high-precision gear machining and assembly processes, increasing production costs, but also results in a large overall size due to the numerous components, making it difficult to adapt to space-constrained scenarios such as furniture. While electrical control systems can achieve flexible sequential adjustment, they require additional sensors, controllers, and drive modules, which not only increases equipment costs but also limits reliability due to power supply layout and significantly reduces reliability in environments without power or in humid conditions.

[0004] Some mechanical control mechanisms attempt to simplify their structure, but fail to ensure the sequential independence of transmission components. For example, when a single control lever links multiple transmission components, the problem of synchronous movement of the transmission components easily arises, failing to meet the sequential requirements of the controlled components. If a separate control component is configured for each transmission component, it will lead to redundancy in the mechanism, requiring multiple adjustments during operation, reducing ease of use, and affecting the user experience. Summary of the Invention

[0005] To solve the above-mentioned technical problems, this utility model provides a control mechanism, including a control component and at least two transmission components. The control component has the same number of control slots as the transmission components. One connecting part of the transmission component is located in the control slot, and the other connecting part is used to connect to the controlled component. The control slot has a connected stationary section and an active section. When the control component moves, the position of the connecting part of the transmission component changes within the slot: when it is in the stationary section, the transmission component is stationary; when it is in the active section, the transmission component moves. Because each active section is located in a different position in the corresponding control slot, the movement of the control component can cause the transmission components to move in different sequences to meet the sequence requirements of the controlled component or gear shifting.

[0006] The technical solution of this utility model is implemented as follows:

[0007] A control mechanism includes a control member and at least two transmission members. The control member has control slots, the same number as the transmission members. Each transmission member includes two connecting portions, one of which is disposed in a control slot, and the other is configured to connect to a controlled member. The control slot has a communicating stationary section and an active section. The control member is configured to change the position of the connecting portion of the transmission member in the control slot when it moves. When the connecting portion is in the stationary section and changes position, the transmission member remains stationary. When the connecting portion is in the active section and changes position, the transmission member moves. Each active section is located in a different position within its control slot.

[0008] In this solution, the main function of the control slot is to drive the movement of the transmission components. Since the positions of each control slot are different, and the movement of different transmission components in the control slot is synchronous when the control components move, it is possible to control the movement of the transmission components in different sequences, thereby satisfying the sequence requirements of the controlled components or the gear switching control that requires sequence. Moreover, the mechanism has a simple structure, low cost, and small volume, and can be used in a variety of scenarios, especially in the control of movable furniture.

[0009] Preferably, the stationary section extends along the direction of movement of the control component, and the active section is inclined relative to the stationary section, with an included angle between them. Different structural designs between the stationary and active sections achieve different effects of the connection part of the transmission component in the stationary and active sections.

[0010] Preferably, the shape and tilt angle of the active section of each control slot are the same, thus achieving uniformity in the movement of the controlled component.

[0011] Preferably, the system also includes a base and a number of controlled components equal to the number of transmission components. The control components, transmission components, and controlled components are all movably mounted on the base. The control components and controlled components are connected via the transmission components, and when the control components move, they sequentially drive the controlled components to move. The transmission components drive the control components and controlled components, and the orderly movement of different controlled components is achieved according to the control slots in the control components.

[0012] Preferably, the control component and the controlled component are slidably mounted on the base, and the transmission component is rotatably mounted on the base.

[0013] Preferably, the base has a raised strip, and the control component has an elongated groove. The raised strip is positioned in the elongated groove, and the position of the raised strip in the elongated groove changes accordingly when the control component slides on the base. This achieves the sliding setting of the control component on the base.

[0014] Preferably, the protrusion is provided with screws and washers, which are configured to confine the protrusion within the elongated groove. This allows the control component to be stably mounted on the base without hindering its sliding.

[0015] Preferably, the control component is connected to a pull wire, which is configured to drive the movement of the control component.

[0016] Preferably, there are two transmission components, and correspondingly, there are two control slots. Each control slot has a stationary section and an active section, and the stationary sections of the two control slots are staggered in the direction perpendicular to the movement of the control components.

[0017] Preferably, there are three or more transmission components. The control slots at the front end and the rear end each have a stationary section and an active section, while the control slots in the middle have two stationary sections and an active section, with the two stationary sections located on both sides of the active section.

[0018] The design starting point, concept, and beneficial effects of this utility model, which adopts the above technical solution, are as follows:

[0019] The elastic components all act in the same direction and are arranged in the same direction. The series arrangement is not necessarily coaxial. Under the action of the state switching component, the elastic components will be selectively connected in series to change the elastic force. In the series state, the elastic force will be weakened. By changing the number of elastic components in the working state, different numbers of elastic components can be connected in series, thereby achieving different elastic force magnitudes. The more elastic components connected in series in the working state, the smaller the elastic force, and vice versa. In this solution, there is no need to adjust the pre-tightening force or pre-compression of the elastic components for a long time. The elastic force magnitude can be switched instantly by controlling the state switching component. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the seat using the device in an embodiment of the present invention. Figure 1 ;

[0021] Figure 2 This is a three-dimensional structural diagram of the seat using the device in an embodiment of the present invention. Figure 2 ;

[0022] Figure 3 This is a three-dimensional structural diagram of the device disposed between the base and the bottom shell in an embodiment of the present invention;

[0023] Figure 4 This is a three-dimensional structural diagram of the device in the embodiments of this utility model when all the additional elastic components are in the working state;

[0024] Figure 5 This is a cross-sectional view of the device in the embodiments of the present invention when all the additional elastic components are in the working state;

[0025] Figure 6 This is a three-dimensional structural diagram of the device in an embodiment where only the second additional component is in a stationary state.

[0026] Figure 7 This is a cross-sectional view of the device in an embodiment where only the second additional component is in a stationary state.

[0027] Figure 8 This is a three-dimensional structural diagram of the device in an embodiment where only the basic attachments are in working condition.

[0028] Figure 9 This is a cross-sectional view of the device in an embodiment where only the basic attachments are in the working state.

[0029] Figure 10 This is a three-dimensional structural diagram of the moving part in the embodiment of the present invention;

[0030] Figure 11 This is a three-dimensional structural diagram of the follower in the embodiments of this utility model;

[0031] Figure 12 This is a three-dimensional structural diagram of the state switching component in the embodiment of the present invention;

[0032] Figure 13 This is a three-dimensional structural diagram of the sleeve in the embodiment of the present invention;

[0033] Figure 14 This is a three-dimensional structural diagram of the present invention when all the follower components are blocked by the state switching component in the embodiments.

[0034] Figure 15 This is a schematic diagram showing the coaxial series arrangement of the elastic elements in an embodiment of the present invention;

[0035] Figure 16 This is a schematic diagram of the control component in an embodiment of the present invention.

[0036] The reference numerals in the attached drawings are as follows: Device 100; Moving component 1; Limiting post 11; Extension shaft 12; Insertion hole 13; Sleeve 2; Circular groove 21; Slot 22; Basic elastic component 3; Additional elastic component 4; First additional elastic component 4a; Second additional elastic component 4b; Follower component 5; First follower component 5a; Second follower component 5b; Annular groove 8; Stepped portion 9; State switching component 6; First state switching component 6a; Second state switching component 6b; Clearance groove 15; First transmission component 1 6; Second transmission component 17; Support arm 18; Control component 19; First control groove 20; First stationary section 201; First active section 202; Second control groove 23; Second stationary section 231; Second active section 232; Long groove 24; Guide shaft 25; Pull cable 26; Protrusion 27; Backrest 200; Seat 300; Extension 301; Mounting groove 302; Mounting seat; 303; Restriction groove 304; Bottom shell 400; Boss 401; Round shaft 402. Detailed Implementation

[0037] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0038] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0039] In the description of this utility model, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] The specific implementation of this utility model is as follows:

[0041] like Figure 4 , 6 As shown in Figures 8 and 16, this utility model provides a control mechanism, including a control member 19 and at least two transmission members. The control member 19 has the same number of control slots as the transmission members. Each transmission member includes two connecting parts, one of which is located in a control slot, and the other is configured to connect to a controlled member. The control slot has a connected stationary section and an active section. The control member 19 is configured to change the position of the connecting part of the transmission member in the control slot when it moves. When the connecting part is in the stationary section and changes position, the transmission member remains stationary; when the connecting part is in the active section and changes position, the transmission member moves. Each active section is located at a different position in its control slot. The stationary section extends along the direction of movement of the control member 19, and the active section is inclined relative to the stationary section, with an included angle between them. Different structural designs between the stationary section and the active section achieve different effects of the connecting part of the transmission member in the stationary section and the active section. The active sections of each control slot have the same shape and inclination angle, achieving uniformity in the movement of the controlled member.

[0042] Specifically, the control mechanism is applied to a device 100 capable of adjusting the elastic force. The device includes at least two elastic elements, with each pair of adjacent elastic elements arranged in series, and a state switching component is provided between each pair of adjacent elastic elements. The elastic elements have a working state and a stationary state. When the elastic element is in the working state, it can extend and retract in response to the movement of the device, and when the elastic element is in the stationary state, it remains stationary. The state switching component has a released state and a blocking state. In the released state, the elastic elements on both sides of the state switching component are in the working state. In the blocking state, the elastic elements on both sides of the state switching component are in the working state and the stationary state, respectively. The state switching component is configured to increase or decrease the number of elastic elements in the working state.

[0043] The elastic components all act in the same direction and are arranged in the same direction. The series arrangement is not necessarily coaxial. Under the action of the state switching component, the elastic components will be selectively connected in series to change the elastic force. In the series state, the elastic force will be weakened. By changing the number of elastic components in the working state, different numbers of elastic components can be connected in series, thereby achieving different elastic force magnitudes. The more elastic components connected in series in the working state, the smaller the elastic force, and vice versa. In this solution, there is no need to adjust the pre-tightening force or pre-compression of the elastic components for a long time. The elastic force magnitude can be switched instantly by controlling the state switching component.

[0044] Specifically, the elastic element includes a basic elastic element 3 and at least one additional elastic element 4; the device also includes a moving element 1 and a sleeve 2, the sleeve 2 serving as a base in the control mechanism, the basic elastic element 3 and the additional elastic element 4 arranged in the same direction, the moving element 1 and the sleeve 2 being relatively movable; a follower element 5 is provided between the basic elastic element 3 and the additional elastic element 4, the basic elastic element 3 being located between the moving element 1 and the follower element 5, the additional elastic element 4 being located between the follower element 5 and the sleeve 2, the follower element 5 being configured to selectively move or remain stationary relative to the sleeve 2; when the follower element 5 and the sleeve 2 are relatively stationary, only the basic elastic element 3 deforms in response to the movement of the moving element 1 and the sleeve 2; when the follower element 5 and the sleeve 2 move relative to each other, both the basic elastic element 3 and the additional elastic element 4 can deform in response to the movement of the moving element 1 and the sleeve 2.

[0045] First, the basic elastic component 3 is always in working condition in the device, which is the elastic foundation of the device and ensures that the device can always provide elastic force. The additional elastic component 4 can switch between working and stationary states under the action of the follower 5. That is, when the follower 5 moves relative to the sleeve 2, the two elastic components are in a linked state, and the additional elastic component 4 can deform together with the basic elastic component 3. At this time, the elastic force that the device can provide is smaller. When the follower 5 is stationary relative to the sleeve 2, the additional elastic component 4 and the basic elastic component 3 are separated by the follower 5. The additional elastic component 4 is stationary and no longer provides elastic force. The elastic force is only provided by the basic elastic component 3. At this time, the elastic force provided by the basic elastic component 3 is greater.

[0046] In addition, in this solution, the device 100 is modularized so that the moving part 1 and the sleeve 2 are respectively connected to the movable and fixed parts of the furniture that need to be adjusted. When the movable part moves, it provides elasticity and can make quick elasticity adjustment, resulting in better functional adaptability.

[0047] In this design, the elasticity is determined not by the sum of the elastic components, but by whether they are in series. Components in series provide less elasticity. With the same compression (i.e., the relative movement of moving part 1 and sleeve 2) and elasticity coefficient, the elasticity provided by the basic elastic component 3 alone is twice that of the basic elastic component 3 and the additional elastic component 4 working together. Based on this, the elasticity levels are determined according to the applicable range (e.g., the user's weight range). The number of additional elastic components 4 can be selected based on the actual situation. The highest elasticity level is when only the basic elastic component 3 is active; the second highest is when two elastic components are in series; the third highest is when three elastic components are in series, and so on. Whether the additional elastic components 4 are in series is determined by the movement of the follower component 5. Adjustment only requires controlling the state of the follower component 5, making elasticity adjustment simple and quick.

[0048] To achieve the above effect and connect the elastic components in series, the elastic components need to be arranged in the same direction, rather than arranged side by side with intervals. For example, when the relative movement direction of the moving part 1 and the sleeve 2 is the front-back direction, the elastic components are all arranged in the front-back direction, rather than arranged side by side with intervals.

[0049] like Figure 1-3 As shown, the device is applied to a seat, which includes a backrest 200, a seat 300, a base shell 400, and the device 100 as described above. The backrest 200 is rotatably mounted on the base shell 400, and the seat 300 is slidably mounted on the base shell 400 and linked with the backrest 200. The device 100 is disposed between the seat 300 and the base shell 400 in the front-back direction. The moving part 1 is connected to the seat 300, and the sleeve 2 is connected to the base shell 400. When the backrest 200 tilts backward, the seat 300 slides forward on the base shell 400 and moves the moving part 1 closer to the sleeve 2.

[0050] When applied to a seat, this device provides cushioning elasticity when the backrest 200 tilts backward and provides auxiliary restoring force when the backrest 200 rotates forward to return to an upright position. The device can also quickly adjust the elasticity based on the user's weight. It is modular and can be applied to different seats. When the elastic element is in action, it can either compress or extend. In this design, when the backrest 200 tilts backward, the seat 300 moves forward, and the elastic element compresses to provide elasticity. During the process of the backrest 200 returning to an upright position, although the elastic element extends, it also assists the seat 300 to move backward and the backrest 200 to return to an upright position by compressing the stored elasticity.

[0051] Specifically, such as Figure 4 , 5 As shown in Figures 10-13, the bottom shell 400 has upwardly extending protrusions 401 at both ends, and the backrest 200 is rotatably connected to the protrusions 401; the seat 300 has an upwardly extending extension 301, and the backrest 200 is rotatably connected to the extension 301, so that when the backrest 200 tilts backward, it drives the seat 300 to slide forward on the bottom shell 400, and when the backrest 200 tilts forward, it drives the seat 300 to slide backward on the bottom shell 400; the seat 300 is provided with rectangular mounting grooves 302 arranged front and back. The device is inserted into the mounting groove 302 and positioned along the front-to-back direction. The rear end of the mounting groove 302 is provided with a recessed mounting seat 303. A limiting groove 304 is provided on the mounting seat 303. The moving part 1 is block-shaped, and the left and right end faces of the moving part 1 are provided with limiting posts 11. When the device is installed into the mounting groove 302, the limiting posts 11 enter the limiting groove 304. The upper part of the limiting groove 304 extends vertically from top to bottom, and the lower part slopes backward from top to bottom. Under the action of the elastic force of the device itself, the limiting posts 11 are located at the lower end of the limiting groove 304 and are not easy to detach from it.

[0052] The sleeve 2 has a circular groove 21 at its front end, and the bottom shell 400 has a circular shaft 402 arranged in the left-right direction at its front. The circular shaft 402 abuts against the circular groove 21. While the device is in the telescopic movement, it is given adaptive rotation to prevent interference. The seat 300 and the bottom shell 400 each have a device 100 on their left and right sides. If there is only one device 100, it can be set in the middle. However, in this embodiment, devices 100 are set on both the left and right sides to maintain uniform and stable force.

[0053] Furthermore, there are two additional elastic components 4, namely the first additional elastic component 4a and the second additional elastic component 4b. Both elastic components are springs. In addition to common telescopic springs, bent spring plates can also be used as elastic components. Both additional elastic components 4 are set in the sleeve 2. There are also two corresponding follower components 5, namely the first follower component 5a and the second follower component 5b. Both follower components 5 are set in the sleeve 2, while the basic elastic component 3 is exposed outside the sleeve 2 and is located between the moving component 1 and the sleeve 2. Corresponding to the two follower components 5, there are also two state switching components 6 in the sleeve 2 as controlled components of the control mechanism, namely the first state switching component 6a and the second state switching component 6b. The follower components 5 and the additional elastic components 4 are arranged along the axial direction of the sleeve 2, and the state switching components 6 are arranged in a radial direction along the sleeve. The sleeve 2 is a sleeve, which has a accommodating function, so that the additional elastic components 4, follower components 5, state switching components 6, etc. can be stably installed. The sliding direction of the state switching component is perpendicular to that of the follower component.

[0054] The sleeve 2 has two slots 22 spaced apart, corresponding to the two state switching elements 6. The two slots 22 are arranged radially along the sleeve 2 and extend into the interior of the sleeve 2. The state switching elements 6 are slidably disposed in the slots 22. The end of the follower 5 is located beside the slot 22. The state switching elements 6 are disposed beside the follower 5 along the movement direction of the moving element 1 and the sleeve 2. The state switching elements 6 enter or leave the interior of the sleeve through the slots 22 to block or avoid the follower 5. When the state switching elements 6 slide between the follower 5 and the sleeve 2, the state switching elements 6 block the follower 5, and the follower 5 and the sleeve 2 remain relatively stationary. When the state switching elements 6 slide... When the follower moves away from the space between the follower 5 and the sleeve 2, the state switching component 6 releases the follower 5, and the follower 5 moves relative to the sleeve 2. The movement and stillness of the follower 5 are controlled by the state switching component 6, which is simple and quick to operate. When the follower 5 moves, the series connection between the additional elastic component 4 and the basic elastic component 3 takes effect. When the follower 5 is still, the series connection between the additional elastic component 4 and the basic elastic component 3 fails, and the additional elastic component 4 no longer functions. The state switching component 6 is provided with a clearance groove 15 for avoiding the additional elastic component 4. The existence of the clearance groove 15 can prevent the state switching component 6 from affecting the elastic component. The shape of the state switching component 6 can be U-shaped.

[0055] like Figure 14 , 15As shown, the basic elastic element 3 and the additional elastic element 4 are coaxially arranged; coaxial arrangement is a more volume-saving series arrangement; the second additional elastic element 4b is closer to the sleeve 2 than the first additional elastic element 4a; the follower 5 between the basic elastic element 3 and the first additional elastic element 4a is the first follower 5a, and the follower 5 between the first additional elastic element 4a and the second additional elastic element 4b is the second follower 5b. The first state switching element 6a is provided next to the first follower 5a, and the second state switching element 6a is provided next to the second follower 5b. Replacement component 6b, first state switching component 6a is located between first follower component 5a and second follower component 5b, second state switching component 6b is located between second follower component 5b and sleeve 2; both ends of follower component 5 are provided with annular grooves 8 for accommodating the ends of springs; in this embodiment, the elastic component works by compression, the ends of the basic elastic component 3 and the additional elastic component 4 are both set in the annular grooves 8 and abut against the follower component 5, in addition, when the elastic component works by extension, the ends of the elastic component also need to be locked in the annular grooves 8 to prevent them from disengaging; also on moving component 1 An annular groove 8 is provided. Specifically, the front end of the basic elastic member 3 is located in the annular groove 8 on the rear end face of the first follower 5a and abuts against the first follower 5a; the rear end of the basic elastic member 3 is located in the annular groove 8 on the moving member 1 and abuts against the moving member 1; the rear end of the first additional elastic member 4a is located in the annular groove 8 on the front end face of the first follower 5a and abuts against the first follower 5a; the front end of the first additional elastic member 4a is located in the annular groove 8 on the rear end face of the second follower 5b and abuts against the second follower 5b; the rear end of the second additional elastic member 4b is located in the annular groove 8 on the rear end face of the second follower 5b. The follower 5b is in the annular groove 8 on the front end face and abuts against the second follower 5b. The front end of the second additional elastic member 4b abuts against the sleeve 2. Therefore, the basic elastic member 3, the first additional elastic member 4a, and the second additional elastic member 4b are arranged coaxially with their ends adjacent to each other, and can selectively realize the series connection of springs. Furthermore, the two slots 22 are located in front of the first follower 5a and the second follower 5b, respectively. That is, the first state switching member 6a is located in front of the first follower 5a, and the second state switching member 6b is located in front of the first follower 5a.

[0056] A guide shaft 25 is provided between the moving part 1 and the sleeve 2. The guide shaft 25 is arranged along the movement direction of the moving part 1 and the sleeve 2, that is, along the front-back direction. The first follower 5a and the second follower 5b are slidably sleeved on the guide shaft 25. The basic elastic member 3, the first additional elastic member 4a, and the second additional elastic member 4b are all sleeved outside the guide shaft 25. In addition, the outer surfaces of the first follower 5a and the second follower 5b are also slidably engaged with the inner surface of the sleeve 2. The guide shaft 25 is inserted into the moving part 1. When the moving part 1 and the sleeve 2 move, the moving part 1 slides on the guide shaft 25. The presence of the guide shaft 25 can increase the stability of the device during movement. Furthermore, the moving part 1 has a hollow extension shaft 12 extending forward from the center of its annular groove 8. The extension shaft 12 has a through insertion hole 13. The guide shaft 25 is disposed in the insertion hole 13. When the moving part 1 moves close to the sleeve 2, the guide shaft 25 selectively extends out of the moving part 1 through the insertion hole 13.

[0057] like Figure 11 , 12 As shown, although the follower 5 can maintain a roughly stable position under the action of the two elastic members, there may still be deviations. Therefore, the end of the follower 5 near the state switching member 6 is provided with several stepped portions 9. The state switching member 6 abuts against any of the stepped portions 9 to block the follower 5. When the state switching member 6 blocks the follower 5, the position of the follower 5 may be deviated. If there were no stepped portions 9, the state switching member 6 would not be able to block the follower 5 when its position is deviated. However, the stepped portions 9 can provide multiple compensations, so that when the follower 5 has different deviations, the state switching member 6 can still abut against different stepped portions 9 to block the follower. Component 5; simultaneously, two elastic transmission components are rotatably provided on the sleeve 2, namely the first transmission component 16 and the second transmission component 17, which are used to control the sliding of the first state switching component 6a and the second state switching component 6b, respectively; the transmission components are elastic and adapt to the stepped portion 9, so that the state switching component 6 can be easily engaged and abutted; the stepped portion 9 has different degrees of protrusion toward the state switching component 6, and the state switching component 6 may not be able to fully enter the sleeve 2 when it abuts with the stepped portion 9, so the elastic transmission component needs to be able to adapt to the protrusion of the stepped portion 9, so that the stroke of the transmission component controlling the sliding of the state switching component 6 is not fixed, so as to prevent interference when the state switching component 6 enters.

[0058] Since there are more than two additional elastic components 4, there are sequential requirements for switching the working and stationary states of the additional elastic components 4 in order to achieve changes between multiple elastic gears: The sleeve 2 is provided with a sliding control component 19, which is connected to the first transmission component 16 and the second transmission component 17. The first transmission component 16 is connected to the first state switching component 6a, and the second transmission component 17 is connected to the second state switching component 6b. When the control component 19 slides to switch the first follower component 5a and the second follower component 5b to a stationary state relative to the sleeve 2, the first state switching component 6a preferentially blocks the second follower component 5b. When the control component 19 slides to switch the first follower component 5a and the second follower component 5b to a moving state relative to the sleeve 2, the first state switching component 6a preferentially avoids the first follower component 5a. With more additional elastic components 4, the device can form more gears, but when there are more than two additional elastic components 4, the sequence of state switching of the follower component 5 also needs to be considered. In this scheme, the basic elastic component 3, the first additional elastic component 4a, and the first additional elastic component 4a are... The second additional elastic element 4b is arranged accordingly. The basic elastic element 3 is always in the working state, and only when it is in the working state is it in the first gear, and the first gear can provide the maximum elastic force. Therefore, when the basic elastic element 3 and its adjacent second additional elastic element 4b are in the working state, it is in the second gear, and when all three are in the working state, it is in the third gear. Therefore, the state switching sequence of the follower 5 achieved by the control element 19, the first transmission element 16, and the second transmission element 17 should be as follows: when gradually reducing the elastic force, the first transmission element 16 releases the force first. Release the first follower 5a, and then release the second follower 5b by the second transmission member 17. Conversely, when gradually increasing the elastic force, the second transmission member 17 first blocks the second follower 5b, and then the first transmission member 16 blocks the first follower 5a. In summary, when reducing the elastic force, the sequence of releasing the follower 5 should start from the one closest to the base elastic member 3 and gradually unlock the follower 5 that is further away. When increasing the elastic force, the sequence of blocking the follower 5 should start from the one furthest from the base elastic member 3 and gradually lock the follower 5 that is closer.

[0059] In this example, the control component 19 is slidably disposed on the lower surface of the sleeve 2. A protruding strip 27 protrudes downwards from the lower surface of the sleeve 2. The control component 19 is plate-shaped with a corresponding elongated groove 24. The control component 19 is mounted on the sleeve 2 using screws and washers, so that the protruding strip 27 is located in the elongated groove 24. The position of the protruding strip 27 in the elongated groove 24 changes when the control component 19 slides. The control component 19 has a first control groove 20 and a second control groove 23. A first transmission component 16 is disposed in the first control groove 20, and a second transmission component 16 is disposed in the second control groove 23. Component 17 is disposed in the second control groove 23. The first control groove 20 and the second control groove 23 are configured to control the movement sequence of the first transmission component 16 and the second transmission component 17. Specifically, the first transmission component 16 and the second transmission component 17 are rotatably disposed on the sleeve 2. The first control groove 20 has a first stationary section 201 with the same movement direction as the moving component 1 and the sleeve 2, and a first active section 202 inclined relative to the first stationary section 201. Correspondingly, the second control groove 23 has a second stationary section 231 and a second active section 202. The first stationary segment 201 is closer to the moving part 1 relative to the first working end, and the second stationary segment 231 is farther away from the moving part 1 relative to the second working segment 232. In this example, the first control groove 20 is located behind the second control groove 23, the first stationary segment 201 is arranged in the front-back direction and is located behind the first working segment 202, and the first working segment 202 is inclined from back to front and inward. The second stationary segment 231 is located in front of the second working segment 232, and the second working segment 232 is also inclined from back to front and inward. The positions of the first stationary segment 201 and the second stationary segment 231 are different in the left-right direction. The second stationary segment 231 is located inside the first stationary segment 201 in the left-right direction, while the first working segment 202 and the second working segment 232 are almost the same. When the control member 19 slides, the transmission member located in the stationary segment remains stationary, while the transmission member located in the working segment will rotate, thereby controlling the corresponding state switching member 6 to slide. The preset motion sequence is realized through structural design, that is, the sequence of control of the follower 5 is realized. The structure is simple and ingenious.

[0060] like Figure 3-14As shown, the control component 19 is connected to a pull cable 26, which is configured to drive the control component 19 to move. An elastic reset component is also provided between the control component 19 and the sleeve 2. The elastic reset component is configured to provide an elastic reset force to the control component 19 in the opposite direction to the direction in which the pull cable 26 drives the control component 19. In this design, the pull cable 26 also has three positions, corresponding to locking both the first follower 5a and the second follower 5b, unlocking the first follower 5a and locking the second follower 5b, and locking both the first follower 5a and the second follower 5b. All 5b are unlocked; more specifically, the transmission component is a torsion spring with two support arms 18 serving as connecting parts in the control mechanism. One support arm 18 is inserted into the state switching component 6 to control the sliding of the state switching component 6, and the other support arm 18 is inserted into the control slot to generate rotation in response to the sliding of the control component 19. When the control component 19 is at its foremost position, the support arms 18 of the first transmission component 16 and the second transmission component 17 are in the same position in the left-right direction, and the support arm 18 of the first transmission component 16 is located in the first stationary section 2. At the rear end of 01, the support arm 18 of the second transmission component 17 is located at the rear end of the second action section 232. At this time, neither the first state switching component 6a nor the second state switching component 6b obstructs the first follower component 5a and the second follower component 5b. The first additional elastic component 4a and the second additional elastic component 4b are both in working state. The three elastic components are connected in series, and the elastic force is at its minimum. At this time, it is the first gear of the pull cable 26. When the pull cable 26 drives the control component 19 to slide backward, the support arm 18 of the first transmission component 16 moves in the first stationary section 201. When the first transmission member 16 remains stationary, the support arm 18 of the second transmission member 17 moves within the second action section 232 and rotates due to tilting. The second transmission member 17 pushes the second state switching member 6b inward. When the support arm 18 of the first transmission member 16 is located at the front end of the first stationary section 201 and the rear end of the first action section 202, and the support arm 18 of the second transmission member 17 is located at the front end of the second action section 232 and the rear end of the second stationary section 231, the second state switching member 6b... Located inside the sleeve 2 and blocking the second follower 5b, the first state switching member 6a still does not block the first follower 5a. At this time, the second additional elastic member 4b switches to the stationary state, and only the basic elastic member 3 is connected in series with the first additional elastic member 4a, and the elastic force increases. At this time, it is the second gear of the pull cable 24. When the pull cable 24 drives the control member 19 to slide further backward, the support arm 18 of the first transmission member 16 moves in the first action section 202, causing the first transmission member 16 to rotate and drive the first state switching member 6a to slide inward, while the support arm 18 of the second transmission member 17 moves in the second stationary section 211, keeping the second state switching member 6b blocking the second follower 5b.When the control component 19 slides to its rearmost position, and the support arm 18 of the first transmission component 16 is at the front end of the first operating section 202, and the support arm 18 of the second transmission component 17 is at the front end of the second stationary section 211, both the first state switching component 6a and the second state switching component 6b are located inside the sleeve 2. The first state switching component 6a blocks the first follower component 5a, causing the first additional elastic component 4a to also switch to a stationary state. Only the basic elastic component 3 is in the working state, with maximum elasticity. This is the third gear of the pull cable 24.

[0061] Another advantage of using a torsion spring as the transmission component is that it can achieve delayed locking. When the follower 5 is affected by the elastic components on both sides, causing it to be positioned in the sleeve 2 to block the slot 22, the state switching component 6 cannot enter the sleeve 2, and the support arm 18 connected to it cannot move. However, the control component 19 can still drive the support arm 18 located in the control slot to move, causing the transmission component to accumulate elastic force. When the follower 5 slides to no longer block the slot 22, the transmission component releases the elastic force to drive the state switching component 6 into the sleeve 2 and block the follower 5.

[0062] Even with more additional elastic components 4, the working and stationary states of each additional elastic component 4 can be switched sequentially through the adaptive design of the control slot. For example, the control slots of the first and last gears are only two-sectioned, namely the working section and the stationary section, while the control slots of the middle gears are three-sectioned, each with two stationary sections and one working section. The two stationary sections are located on both sides of the working section, with the only difference being the position of the working section. The control sequence can be determined based on the position of the working section.

Claims

1. A control mechanism, characterized in that: It includes a control component and at least two transmission components; the control component has the same number of control slots as the transmission components, and the transmission component includes two connecting parts, one of which is disposed in the control slot, and the other connecting part is configured to connect to the controlled component; the control slot has a communicating stationary section and an active section, and the control component is configured to change the position of the connecting part of the transmission component in the control slot when the control component moves. When the connecting part is in the stationary section and changes position, the transmission component remains stationary; when the connecting part is in the active section and changes position, the transmission component moves; each active section is located in a different position in its control slot.

2. The control mechanism according to claim 1, characterized in that: The stationary section extends along the direction of movement of the control component, while the active section is inclined relative to the stationary section, with an included angle between them.

3. The control mechanism according to claim 2, characterized in that: The shape and tilt angle of the active section of each control slot are the same.

4. The control mechanism according to claim 1, characterized in that: It also includes a base and a number of controlled components equal to the number of transmission components. The control components, transmission components, and controlled components are all movably mounted on the base. The control components and controlled components are connected by transmission components. When the control components move, they sequentially drive the controlled components to move.

5. The control mechanism according to claim 4, characterized in that: The control component and the controlled component are slidably mounted on the base, while the transmission component is rotatably mounted on the base.

6. The control mechanism according to claim 4, characterized in that: The base has a raised strip, and the control component has a long groove. The raised strip is set in the long groove. When the control component slides on the base, the position of the raised strip in the long groove changes accordingly.

7. The control mechanism according to claim 6, characterized in that: The protrusion is equipped with screws and washers, which are configured to confine the protrusion within the long groove.

8. The control mechanism according to claim 1, characterized in that: The control unit is connected by a pull cable, which is configured to drive the movement of the control unit.

9. The control mechanism according to claim 1, characterized in that: There are two transmission components, and correspondingly, there are two control slots. Each control slot has a stationary section and an active section, and the stationary sections of the two control slots are staggered in the direction perpendicular to the movement of the control components.

10. The control mechanism according to claim 1, characterized in that: There are three or more transmission components. The control slots at the front and rear ends each have a stationary section and an active section, while the control slots in the middle have two stationary sections and an active section, with the two stationary sections located on either side of the active section.

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