A dynamic switching module and application thereof
By using the gear transmission system in the dynamic switching module, the problem of the multifunctional sofa tipping over during state switching is solved, thus improving the safety and versatility of the sofa.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- UE FURNITURE CO LTD
- Filing Date
- 2023-10-11
- Publication Date
- 2026-05-12
AI Technical Summary
The mechanical extension mechanism of existing multi-functional sofas is prone to tipping forward and overturning during mode switching. The existing anti-tilting mechanism cannot be adapted to various mechanical extension mechanisms, resulting in insufficient versatility.
Design a dynamic switching module, including a base, a movable component, a support rod, and gears. The synchronous rotation of the support rod is achieved through gear transmission. The support rod and the movable component are linked to adapt to the state changes of different mechanical extension devices and provide effective support.
It prevents the sofa from tipping over during the extension of the leg support assembly, improving the sofa's safety and making it compatible with various mechanical extension devices, thus enhancing its versatility.
Smart Images
Figure CN117582084B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of seating, and in particular to a dynamic switching module and its application. Background Technology
[0002] Sofas, as comfortable seating for relaxation, have become an essential piece of furniture in many households. In recent years, multi-functional sofas have been increasingly applied to various scenarios. Existing multi-functional sofas typically have a mechanical extension device beneath the seat frame to enable sofa movement. This device usually includes a footstool assembly, a seat cushion support assembly, and a backrest assembly. The seat cushion support assembly includes a seat mounting plate for mounting the seat cushion assembly; the backrest assembly includes a backrest connector with an upward-extending metal insert and a front hinge and a rear hinge, positioned one at the front and one at the rear. The bottom of the metal insert is rotatably connected to the upper ends of the front and rear hinges, respectively. Depending on the situation, the front hinge is hinged to the seat mounting plate or other links in the mechanical extension device, while the rear hinge is hinged to a support link connected to the base plate of the mechanical extension device, or to other links. The footstool assembly, seat cushion assembly, and backrest assembly work together during the movement of the entire mechanical extension device to meet user needs in different states.
[0003] Thanks to its mechanical extension mechanism, multi-functional sofas offer multiple positions for users to choose from to meet different needs. Generally, multi-functional sofas have sitting, TV, and reclining positions. These three positions are typically controlled manually or electrically, switching between them by controlling the sliding seat frame mounted on the iron frame. The seat frame moves, causing the leg supports to open upwards, transitioning the sofa from a sitting to a TV position. The seat frame continues to move, causing the backrest to flip backwards, transitioning the sofa from a TV position to a reclining position. However, during the transition from a sitting to a TV position, the leg supports gradually lift and extend, becoming suspended on the outside of the sofa. This causes the sofa's center of gravity to shift forward, making it prone to tilting forward and potentially tipping over. This significantly reduces the sofa's safety and greatly diminishes the user experience.
[0004] Therefore, it is necessary to install a device to prevent the sofa from tipping forward on the multifunctional sofa to avoid the above-mentioned hidden dangers. For example, a functional sofa extension device with an anti-forward tilting mechanism disclosed in CN218889475U includes a support mechanism, which includes a slider, a support sleeve and a support rod. The movement of the leg support component drives the support rod to rotate and move towards the ground. When the sofa is opened, the support rod is close to the ground. When the sofa tilts forward, it drives the support rod to support the ground, reducing the risk of the sofa tilting forward and tipping over. After the leg support component is fully opened, the support rod supports and presses against the ground, thereby improving the safety of the sofa when in use.
[0005] However, the aforementioned anti-tilting mechanism has some limitations. This mechanism is fixedly mounted on the seat frame iron frame, i.e., the mechanical extension device. This mechanical extension device and the support mechanism within the anti-tilting mechanism have a specific linkage and assembly position relationship. Mechanical extension devices on the market come in various types and structures. If this support mechanism is directly applied to other mechanical extension devices, it will cause movement interference due to size, position, and other reasons. Alternatively, even if the movement is normal, the ground clearance of the support rod will change after rotation, failing to achieve the intended support purpose. For these reasons, different mechanical extension devices require modification and redesign, which is very inconvenient. Therefore, the aforementioned support mechanism is only suitable for specific mechanical extension devices that are the same as or very similar to this application, and cannot be directly adapted to more types of multi-functional sofas, exhibiting significant constraints and limitations in its versatility. Summary of the Invention
[0006] To address the aforementioned technical problems, the present invention aims to provide a dynamic switching module. This dynamic switching module is an independent modular design. When triggered, the movable part moves linearly relative to the base. The movable part meshes with a gear transmission. The gear and the upper part of the support rod remain relatively fixed in the circumferential direction. The movement of the movable part drives the gear to rotate, causing the support rod to rotate synchronously. The support rod changes from retracted to open. The dynamic switching module has a simple structure and convenient state transition operation.
[0007] The paper then provides an application of a dynamic switching module. By linking the dynamic switching module with the mechanical extension device of the functional sofa, the dynamic switching module provides effective support for the functional sofa in accordance with the state changes of the mechanical extension device, thus preventing the functional sofa from tilting forward and tipping over during the unfolding of the leg support component.
[0008] The technical solution of this invention is implemented as follows:
[0009] A dynamic switching module includes a base, a movable component that moves linearly relative to the base, a support rod that rotates relative to the base, and a gear that creates a linkage between the movable component and the support rod. The gear is rotatably connected to the base, and the gear and the upper part of the support rod are relatively fixed in the circumferential direction so that the gear can drive the support rod to rotate synchronously. The movable component has a row of teeth on the side opposite to the gear that mesh with the gear transmission. When triggered, the movable component moves along the base and drives the gear to rotate, thereby rotating the support rod.
[0010] Preferably, the base is provided with a guide groove, and the support rod is provided with a guide pin. The guide pin engages with the guide groove to allow the support rod to rotate along the trajectory of the guide groove. The guide pin slides along the guide groove, allowing the support rod to move along the predetermined trajectory of the guide groove.
[0011] Preferably, the guide groove is configured such that the support rod is first guided to rotate from back to front and then pulled down via a guide pin. The guide pin slides along the shape of the guide groove from back to front and then downward to open the support rod from the inside of the handrail to the outside.
[0012] Preferably, when the movable part is not pushed by an external force, the support rod is in a retracted state; after the movable part is pushed by an external force, the support rod is in an open state after rotation; the guide groove for the support rod from the retracted state to the open state is set in two sections. The front section is an arc-shaped groove that gradually decreases from top to bottom and extends from back to front, and the rear section extends downward at an angle from the end of the arc-shaped groove. The shape of the front section of the guide groove is an arc shape that allows the support rod to rotate synchronously with the gear. The downward angle of the rear section of the guide groove helps the support rod to stay at the end position after opening without moving back, and also facilitates the elimination of ground clearance after the support rod is opened.
[0013] Preferably, the movable component is located beside the base and configured to be inseparable from the base along its thickness direction. Upon triggering, the movable component moves relative to the mounting base beside it, preventing interference with other components during movement.
[0014] Preferably, the movable component has a through groove extending along its length, and at least two locking pins are inserted into the through groove. The locking pins are fixedly connected to the base, allowing the movable component to move back and forth along the positions of the locking pins. The presence of the locking pins ensures that the movable component moves only in a fixed direction, guaranteeing that the movable component moves linearly relative to the mounting base.
[0015] Preferably, the dynamic switching module also includes a cover plate, which is fixedly connected to the base by fasteners, and the movable part and support rod are stacked and sandwiched between the cover plate and the base; a locking pin is fixedly disposed on the base, or the locking pin is fixedly disposed on the cover plate. The cover plate helps to protect the movement of the movable part and support rod from interference.
[0016] Preferably, triggering of the moving part means either that the moving part is pushed and moves in the direction of pushing, or that the moving part is pulled and moves in the direction of pulling. The triggering method of the moving part is not fixed; after being triggered, the moving part will move linearly relative to the base and drive the gear to rotate.
[0017] Preferably, the upper part of the support rod is Y-shaped to form a notch in the middle. A limiting block that mates with the notch is provided at the connection point between the gear and the support rod. The limiting block engages with the notch to achieve synchronous rotation of the gear and the support rod. When the support rod moves to its end along the shape of the guide groove, the presence of the notch provides sufficient rotational space for the support rod to slide obliquely downwards.
[0018] Preferably, the triggered end of the moving part extends along its width to form an extension segment. The design of the extension segment can effectively increase the triggering range of the moving part and prolong the triggering time.
[0019] Preferably, when the movable part is not pushed by an external force, the support rod is in a retracted state; after the movable part is pushed by an external force, the support rod is in an open state after rotation; the dynamic switching module also includes an elastic element configured to give the support rod a tendency to move in the retracting direction. Under the action of the elastic element, the support rod is in the open state, and at this time, the movable part can return to the retracted state after it is no longer pushed by an external force.
[0020] Preferably, the gear is rotatably connected to the base via fasteners, which are then fixedly connected to the base. The end face of the gear is recessed inward to form a groove, and the elastic element is disposed within the groove. Several pillars are also provided within the groove. One end of the elastic element is connected to one of the pillars, and the other end is connected to the fasteners. When the gear rotates, the elastic element deforms, generating a restoring force. The presence of the elastic element allows the dynamic switching module to automatically switch from an open state to a retracted state.
[0021] Preferably, the fastener is a screw, which is threadedly connected to the base. One end of the elastic element rests on the column, and the other end is engaged in the screw groove on the nut. One end of the elastic element is fixed in the fastener, and the other end rests on the column and deforms synchronously with the rotation of the gear. When no external force is applied, the elastic element generates a reset force, causing the dynamic switching module to reset.
[0022] Preferably, a threaded hole is provided in the middle of the screw groove, and a pressure plate is provided on the gear. The pressure plate covers the outside of the groove, and the center of the pressure plate is fixed by a bolt screwed into the threaded hole in the center of the screw groove on the fastener. The presence of the pressure plate helps to keep the elastic element fixed inside the gear during the deformation and recovery process, preventing the elastic element from flying out of the gear.
[0023] Preferably, the support rod has a roller at one end for opening the support. The roller design allows the support rod to open outwards more quickly as it rotates with the gear.
[0024] An application of a dynamically switching module,
[0025] S1, calculate the motion trajectory of the mechanical extension device, record the motion trajectory of the mechanical extension device in the middle of the sofa armrest that needs to be loaded with the dynamic switching module, and record and select the support link near the front end of the armrest in the mechanical extension device during the second half of the motion trajectory, i.e. when the leg support assembly is about to be fully opened.
[0026] S2, Install the triggering component; install the triggering component on the support link.
[0027] S3, Install the dynamic switching module, install the dynamic switching module on the inner side of the front end of the handrail, and make the moving part in the position to meet the push of the triggering part at the installation position.
[0028] S4, trigger the dynamic switching module. When the leg support assembly of the mechanical extension device changes from the retracted state to the open state, the triggering component moves with the support link it is attached to and triggers the dynamic switching module to act when the leg support assembly is about to be fully opened, so that the support rod opens and supports the ground.
[0029] Preferably, the mechanical extension device includes two symmetrically arranged mechanical extension units, each including the support link. A triggering component is disposed on the mechanical extension unit adjacent to the dynamic switching module. After the mechanical extension unit is extended, the triggering component moves synchronously with the support link and gradually approaches the movable component until it triggers the movable component.
[0030] Preferably, the mechanical extension unit includes a seat assembly, a backrest assembly, and a leg rest assembly. The seat assembly includes a seat frame support plate and multiple support rods disposed below the seat frame support plate. The triggering component is fixedly mounted on one of the support rods. When the leg rest assembly transitions from a retracted state to an open state, the seat assembly is activated, and the triggering component moves forward along its attached support rod to trigger the movable component in the dynamic switching module. The triggering component can trigger the movable component simply by moving with the support rod, resulting in a simple structure that eliminates the need for an additional triggering mechanism.
[0031] Preferably, the mechanical extension device has three states: sitting, TV position, and lying position. In the sitting position, the leg support assembly is in a retracted state; in the TV position, the leg support assembly is in an intermediate state transitioning from the retracted to the open state; and in the lying position, the leg support assembly is in a fully open state. The state transition of the mechanical extension device synchronously drives the positional changes of the sitting assembly, backrest assembly, and leg support assembly.
[0032] Preferably, the dynamic switching module has a triggered state, a reset state, and an isolated state. In the triggered state, the mechanical extension device switches from a TV posture to a lying posture, and the leg support assembly switches to the open state. The triggering component acts on the movable part, causing it to drive the gear to rotate, so that the support rod rotates along the guide groove to open. In the reset state, the mechanical extension device switches from a lying posture to a sitting posture, and the leg support assembly switches from the open state to the closed state. The dynamic switching module is not affected by the triggering component. The gear is driven by the elastic element to rotate in the opposite direction, driving the movable part to reset and the support rod to reset and close. In the isolated state, the mechanical extension device switches between a sitting posture and a TV posture. The leg support assembly opens or closes normally, and the dynamic switching module does not move.
[0033] The principle and beneficial effects of the present invention, which adopts the above technical solution, are as follows:
[0034] This invention provides a dynamic switching module, including a base, a movable component that moves linearly relative to the base, a support rod, and a gear. The gear is rotatably connected to the base, and the gear and the upper part of the support rod are relatively fixed in the circumferential direction. A row of teeth that mesh with the gear transmission are provided on the side of the movable component opposite to the gear. When triggered, the movable component moves linearly along the base and drives the gear to rotate so that the support rod can rotate and open. This structure is simple and the state switching operation is flexible and convenient.
[0035] The paper then provides an application of a dynamic switching module. A suitable support link in the sofa's mechanical extension device is calculated and selected. A triggering component is installed on the support link, and the dynamic switching module is installed on the inner front side of the sofa armrest. The triggering component moves with the support link and triggers the dynamic switching module to move when the leg support assembly is about to be fully opened, so that the support rod opens and supports the ground. The dynamic switching module, in conjunction with the state changes of the mechanical extension device, provides effective support for the functional sofa and prevents the functional sofa from tilting forward and tipping over during the unfolding of the leg support assembly. Attached Figure Description
[0036] Figure 1 A 3D view of the dynamically switching modules;
[0037] Figure 2 This is the front view when the dynamically switching modules are collapsed.
[0038] Figure 3 This is the rear view when the dynamically switching modules are retracted.
[0039] Figure 4 This is the front view when the dynamically switching module is open.
[0040] Figure 5 The rear view when the dynamically switching module is open;
[0041] Figure 6 An exploded view of the dynamically switching modules;
[0042] Figure 7 This is an exploded view of the module from another angle for dynamic switching.
[0043] Figure 8 A 3D view of the overall structure of the sofa;
[0044] Figure 9 A side view of the sofa in a seated position;
[0045] Figure 10 A 3D image of a person sitting on a sofa.
[0046] Figure 11 A side view of the sofa in a TV position;
[0047] Figure 12 A 3D image of a sofa in a TV pose;
[0048] Figure 13 A side view of a person reclining on a sofa;
[0049] Figure 14 A 3D image of a person reclining on a sofa;
[0050] The reference numerals in the attached figures are as follows: 1-Armrest, 2-Mechanical extension device, 21-Trigger component, 22-Mechanical extension unit, 23-Seat assembly, 24-Backrest assembly, 25-Seat frame support plate, 26-Support linkage, 3-Dynamic switching module, 31-Base, 311-Guide groove, 32-Moving part, 321-Through groove, 322-Extension section, 323-Gear, 33-Support rod, 331-Guide pin, 332-Notch, 333-Roller, 34-Gear, 341-Fastener, 342-Groove, 343-Elastic element, 344-Column, 345-Limiting block, 346-Turning groove, 347-Threaded hole, 35-Cover plate, 351-Locking pin, 36-Pressure plate, 4-Leg support assembly. Implementation
[0051] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention 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.
[0052] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.
[0053] The specific embodiments of the present invention are as follows:
[0054] like Figures 1-7As shown, a dynamic switching module includes a base 31, a movable member 32 that moves linearly relative to the base 31, a support rod 33 that rotates relative to the base 31, and a gear 34 that creates a linkage between the movable member 32 and the support rod 33. The gear 34 is rotatably connected to the base 31, and the gear 34 and the upper part of the support rod 33 are relatively fixed in the circumferential direction so that the gear 34 can drive the support rod 33 to rotate synchronously. The movable member 32 has a row of teeth 323 that mesh with the gear 34 on the side opposite to the gear 34. When triggered, the movable member 32 moves along the base 31 and drives the gear 34 to rotate, thereby rotating the support rod 33.
[0055] Specifically, such as Figure 3 , 5 As shown in Figure 7, the base 31 is provided with a guide groove 311, and the support rod 33 is provided with a guide pin 331. The guide pin 331 is inserted into the guide groove 311 to realize the support rod 33 rotating along the trajectory of the guide groove 311. The shape of the guide groove 311 is configured such that the support rod 33 is first guided to rotate from back to front and then pulled down by the guide pin 331, so that the support rod can move along the predetermined trajectory of the guide groove.
[0056] Furthermore, such as Figure 3 , 5 As shown in Figure 7, when the movable part 32 is not triggered by an external force, the support rod 33 is in a retracted state. When the movable part 32 is triggered by an external force, the support rod 33 is in an open state after rotation. The guide groove 311 is set in two sections. When the support rod 33 changes from the retracted state to the open state, the front section 312 is an arc-shaped groove that gradually descends from top to bottom and extends from back to front. The rear section 313 extends downward from the end of the arc-shaped groove. This design helps the support rod to stay at the end position after opening and not move back. It also makes it easier to eliminate the ground clearance after the support rod opens. At the same time, the support rod 33 is provided with a roller 333 at the end of the open support along the guide groove, so that the support rod can open outward faster as it rotates with the gear.
[0057] Furthermore, such as Figure 2 , 4 As shown, the movable part 32 is located beside the base 31 and is configured to be inseparable from the base 31 along the thickness direction of the base 31. The movable part 32 has a through groove 321 arranged along its own length direction. At least two locking pins 351 are inserted in the through groove 321. The locking pins 351 are fixedly connected to the base 31 so that the movable part 32 can move back and forth along the position of the locking pins 351.
[0058] Furthermore, such as Figures 6-7As shown, the dynamic switching module 3 also includes a cover plate 35, which is fixedly connected to the base 31 by fasteners. The movable part 32 and the support rod 33 are stacked and sandwiched between the cover plate 35 and the base 31. The locking pin 351 is fixedly set on the base 31, or the locking pin 351 is fixedly set on the cover plate 35. The upper part of the support rod 33 is Y-shaped to form a notch 332 in the middle. The gear 34 is provided with a limiting block 345 that cooperates with the notch 332 at the connection between it and the support rod 33. The limiting block 345 is inserted into the notch 332 to realize the synchronous rotation of the gear 34 and the support rod 33.
[0059] Furthermore, such as Figure 8 As shown, the triggered end of the movable part 32 extends along its own width to form an extension section 322. The triggering of the movable part 32 means that: after the extension section 322 of the movable part 32 is pushed by an external force, the movable part 32 will move in a straight line along the base in the direction of the push; or, after the extension section 322 of the movable part 32 is pulled by an external force, the movable part 32 will move in a straight line along the base in the direction of the pull.
[0060] Furthermore, such as Figure 2 , 4 As shown in Figures 6 and 7, the dynamic switching module 3 also includes an elastic element 343, which is configured to cause the support rod 33 to tend to move in the retracting direction. The gear 34 is rotatably connected to the base 31 via a fastener 341, which is fixedly connected to the base 31. The end face of the gear 34 is recessed inward to form a groove 342, and the elastic element 343 is disposed within the groove 342. Several posts 344 are also provided within the groove 342. One end of the elastic element 343 is connected to one of the posts 344, and the other end is connected to the fastener 341. When the gear 34 rotates, the elastic element 343 deforms to generate a restoring elastic force. The fastener 341 is a fastening screw, and the fastening screw... The base 31 is fixed by a threaded connection. In this embodiment, the elastic element is a torsion spring with a ring-shaped body. One end of the elastic element 343 is curled to form a hook and is secured to the column 344. The other end of the elastic element 343 is straight and inserted into the screw groove 346 on the nut. A threaded hole 347 is also provided in the middle of the screw groove 346. A pressure plate 36 is also provided on the gear 34. The pressure plate 36 covers the groove 342, and the center of the pressure plate 36 is fixed by a bolt screwed into the threaded hole 347 in the center of the screw groove 346 on the fastener 341. The presence of the pressure plate 36 helps the elastic element 343 to remain fixed in the gear 34 during the deformation and reset process, preventing the elastic element 343 from flying out of the gear 34.
[0061] like Figures 8-14 As shown, the present invention further provides an application of a dynamically switching module, the specific steps of which are as follows:
[0062] S1, calculate the movement trajectory of the mechanical extension device 2. The sofa will be equipped with various mechanical extension devices according to the functional needs. When a mechanical extension device is selected, the movement trajectory of the mechanical extension device 2 in the middle of the armrest 1 where the dynamic switching module 3 needs to be installed is recorded. In the second half of the movement trajectory, when the leg support assembly 4 is about to be fully opened, the support link 26 near the front end of the armrest 1 in the mechanical extension device 2 is recorded and selected. This support link 26 can be a component of the footrest assembly in the mechanical extension device or a component of the seat cushion support assembly.
[0063] S2, Install triggering component 21. Install triggering component 21 on the support link selected in S1. Triggering component 21 is either an abutment post or a pull hook.
[0064] S3, Install the dynamic switching module 3. Install the dynamic switching module 3 on the inner side of the front end of the handrail 1. At this installation position, the movable part 32 is in the state of responding to the triggering part 21.
[0065] S4, triggering the dynamic switching module 3, when the leg support assembly 4 of the mechanical extension device 2 changes from the retracted state to the open state, the triggering component 21 moves with the support link 26 to which it is attached and triggers the dynamic switching module 3 to act when the leg support assembly 4 is about to be fully opened, so that the support rod 33 opens and supports the ground.
[0066] Specifically, such as Figure 8 As shown, the mechanical extension device 2 includes two symmetrically arranged mechanical extension units 22. In this embodiment, the triggering component 21 is disposed on the support rod 26 in the mechanical extension unit 22 adjacent to the dynamic switching module 3. The mechanical extension unit 22 includes a seat assembly 23, a backrest assembly 24, and a leg support assembly 4. The seat assembly 23 includes a seat frame support plate 25 and multiple support rods 26 disposed below the seat frame support plate 25. The triggering component 21 is fixedly disposed on one of the support rods 26. When the leg support assembly 4 transitions from a retracted state to an open state, the seat assembly 23 is linked, and the triggering component 21 moves forward along the support rod 26 to trigger the movable component 32 in the dynamic switching module 3. No additional triggering mechanism is required to trigger the movable component 32. Since the composition structure of the mechanical extension unit is not the focus of this patent, its structure will not be described in detail.
[0067] Furthermore, such as Figures 8-14As shown, the mechanical extension device 2 has three states: sitting, TV position, and lying position. In the sitting position, the leg support assembly 4 is in a retracted state. In the TV position, the leg support assembly 4 is in an intermediate state transitioning from the retracted state to the open state. In the lying position, the leg support assembly 4 is in a fully open state. Correspondingly, the dynamic switching module 3 has three states: trigger state, reset state, and isolated state. In the trigger state, the mechanical extension device 2 switches from the TV position to the lying position, and the leg support assembly 4 switches to the open state. The triggering component 21 acts on the movable component 32, causing it to drive the gear 34 to rotate, so that the support rod 33 rotates and opens along the guide groove 311. In the reset state, the mechanical extension device 2 switches from the lying position to the sitting position, and the leg support assembly 4 switches from the open state to the retracted state. The dynamic switching module 3 is not affected by the triggering component 21. The gear 32 is rotated in the opposite direction by the elastic component 343, which drives the movable component 32 to reset and the support rod 33 to reset and retract. In the isolated state, the mechanical extension device 2 switches between the sitting and TV positions, and the leg support assembly 4 opens or retracts normally, while the dynamic switching module 3 does not move.
[0068] In summary, when the mechanical extension device 2 transitions from a sitting to a reclining position, the trigger component 21 moves forward along its attached support rod 26 until it reaches the extension section 322 of the movable component 32. This causes the movable component 32 to move linearly along the base 31. The movable component 32 drives the gear 34 to rotate, thereby opening the support rod 33 and supporting it on the ground. This avoids the problem of the center of gravity shifting forward and tipping over that may occur during the transition of the functional sofa's state, improving the overall safety of the functional sofa. Furthermore, the independent and universal modular design of the dynamic switching module 3 allows it to be adapted to the mechanical extension device 2 of various types of functional sofas, making it more versatile and practical.
[0069] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.
Claims
1. A dynamic switching module, characterized in that: The device includes a base (31), a movable part (32) that moves linearly relative to the base (31), a support rod (33) that rotates relative to the base (31), and a gear (34) that creates a linkage between the movable part (32) and the support rod (33). The gear (34) is rotatably connected to the base (31). The gear (34) and the upper part of the support rod (33) are relatively fixed in the circumferential direction so that the gear (34) drives the support rod (33) to rotate synchronously. The movable part (32) has a row of teeth (323) that mesh with the gear (34) on the side opposite to the gear (34). When the movable part (32) is triggered, it moves along the base (31) and drives the gear (34) to rotate so that the support rod (33) rotates.
2. The dynamic switching module according to claim 1, characterized in that: The base (31) is provided with a guide groove (311), and the support rod (33) is provided with a guide pin (331). The guide pin (331) is inserted into the guide groove (311) to realize that the support rod (33) rotates along the trajectory of the guide groove (311).
3. The dynamic switching module according to claim 2, characterized in that: The guide groove (311) is configured such that the support rod (33) is first guided to rotate from back to front and then pulled down by the guide pin (331).
4. A dynamic switching module according to claim 3, characterized in that: When the movable part (32) is not triggered by an external force, the support rod (33) is in a retracted state; after the movable part (32) is triggered by an external force, the support rod (33) is in an open state after rotation; when the support rod (33) changes from a retracted state to an open state, the guide groove (311) is set in two sections. The front section (312) is an arc-shaped groove that gradually descends from top to bottom and extends from back to front, and the rear section (313) extends downwards and forwards from the end of the arc-shaped groove.
5. A dynamic switching module according to claim 1, characterized in that: The movable part (32) is located beside the base (31) and is configured to be inseparable from the base (31) along the thickness direction of the base (31).
6. A dynamic switching module according to claim 5, characterized in that: The movable part (32) has a through groove (321) arranged along its own length direction. At least two locking pins (351) are inserted in the through groove (321). The locking pins (351) are fixedly connected to the base (31) so that the movable part (32) can move back and forth along the position of the locking pins (351).
7. A dynamic switching module according to claim 6, characterized in that: The dynamic switching module (3) also includes a cover plate (35), which is fixedly connected to the base (31) by fasteners, and the movable part (32) and the support rod (33) are stacked and sandwiched between the cover plate (35) and the base (31); the locking pin (351) is fixedly set on the base (31), or the locking pin (351) is fixedly set on the cover plate (35).
8. A dynamic switching module according to claim 1, characterized in that: The triggering of the movable part (32) means that the movable part (32) is pushed and moves in the direction of pushing, or the movable part (32) is pulled and moves in the direction of pulling.
9. A dynamic switching module according to claim 1, characterized in that: The upper part of the support rod (33) is Y-shaped to form a notch (332) in the middle. The gear (34) is provided with a limiting block (345) that cooperates with the notch (332) at the connection between it and the support rod (33). The limiting block (345) is inserted into the notch (332) to realize the synchronous rotation of the gear (34) and the support rod (33).
10. A dynamic switching module according to claim 1, characterized in that: The triggered end of the movable part (32) extends along its own width direction to form an extension segment (322).
11. A dynamic switching module according to claim 1, characterized in that: When the movable part (32) is not triggered by an external force, the support rod (33) is in a retracted state; after the movable part (32) is triggered by an external force, the support rod (33) is in an open state after rotation; the dynamic switching module (3) also includes an elastic element (343), which is configured to make the support rod (33) have a tendency to move in the retracted direction.
12. A dynamic switching module according to claim 11, characterized in that: The gear (34) is rotatably connected to the base (31) by a fastener (341), and the fastener (341) is fixedly connected to the base (31). The end face of the gear (34) is recessed inward to form a groove (342). The elastic element (343) is disposed in the groove (342). Several columns (344) are also provided in the groove (342). One end of the elastic element (343) is connected to the column (344), and the other end of the elastic element (343) is connected to the fastener (341). When the gear (34) rotates, the elastic element (343) deforms to generate a restoring elastic force.
13. A dynamic switching module according to claim 12, characterized in that: The fastener (341) is a fastening screw, which is threadedly connected to the base (31). One end of the elastic element (343) rests on the column (344), and the other end of the elastic element (343) is stuck in the screw groove (346) on the nut.
14. A dynamic switching module according to claim 13, characterized in that: The screw groove (346) is also provided with a threaded hole (347) in the middle position. A pressure plate (36) is also provided on the gear (34). The pressure plate (36) covers the groove (342), and the center of the pressure plate (36) is fixed by screwing a bolt into the threaded hole (347) in the center of the screw groove (346) on the fastener (341).
15. A dynamic switching module according to claim 1, characterized in that: The support rod (33) has a roller (333) at one end where the support is opened.
16. An application of a dynamic switching module, characterized by: S1, calculate the motion trajectory of the mechanical extension device (2), record the motion trajectory of the mechanical extension device (2) in the middle of the handrail (1) that needs to be loaded with the dynamic switching module (3), and when the leg support assembly (4) is about to be fully opened in the second half of the motion trajectory, record and select the support link (26) in the mechanical extension device (2) that is close to the front end of the handrail (1) during this period. S2, Install triggering component (21) on the support link. S3, install the dynamic switching module (3), install the dynamic switching module (3) as described in any one of claims 1-13 on the inner side of the front end of the handrail (1), and make the movable part (32) in the position to meet the triggering of the triggering component (21) at the inner side of the front end of the handrail; S4, trigger the dynamic switching module (3). When the leg support assembly (4) of the mechanical extension device (2) changes from the retracted state to the open state, the triggering component (21) moves with the support link (26) to which it is attached and triggers the dynamic switching module (3) to make it move when the leg support assembly (4) is about to be fully opened, so that the support rod (33) opens and is supported on the ground.
17. The application of a dynamic switching module according to claim 16, characterized in that: The mechanical extension device (2) includes two mechanical extension units (22) that are symmetrically arranged on the left and right. The mechanical extension unit (22) includes the support link (26). The triggering component (21) is arranged on the mechanical extension unit (22) adjacent to the dynamic switching module (3).
18. The application of a dynamic switching module according to claim 17, characterized in that: The mechanical extension unit (22) includes a seat assembly (23), a backrest assembly (24), and a leg support assembly (4). The seat assembly (23) includes a seat frame support plate (25) and multiple support rods (26) disposed below the seat frame support plate (25). The triggering component (21) is fixedly disposed on one of the support rods (26). When the leg support assembly (4) changes from a retracted state to an open state, the seat assembly (23) is linked, and the triggering component (21) moves forward along the support rod (26) to trigger the movable part (32) in the dynamic switching module (3).
19. The application of a dynamic switching module according to claim 18, characterized in that: The mechanical extension device (2) has three states: sitting, TV position and lying position. In the sitting position, the leg support assembly (4) is in the retracted state. In the TV position, the leg support assembly (4) is in the intermediate state between the retracted state and the open state. In the lying position, the leg support assembly (4) is in the fully open state.
20. The application of a dynamic switching module according to claim 19, characterized in that: The dynamic switching module (3) has a triggered state, a reset state, and an isolated state. In the triggered state, the mechanical extension device (2) switches from the TV posture to the lying posture, and the leg support assembly (4) switches to the open state. The triggering component (21) acts on the movable part (32) to drive the gear (34) to rotate so that the support rod (33) rotates and opens along the guide groove (311). In the reset state, the mechanical extension device (2) switches from the lying posture to the sitting posture, and the leg support assembly (4) switches from the open state to the closed state. The dynamic switching module (3) is not affected by the triggering component (21). The gear (34) rotates in the opposite direction under the action of the elastic element (343) and drives the movable part (32) to reset and the support rod (33) to reset and close. In the isolated state, the mechanical extension device (2) switches between the sitting posture and the TV posture. The leg support assembly (4) opens or closes normally, while the dynamic switching module (3) does not move.