A seat opening and closing auxiliary mechanism and a seat

Abstract

The utility model discloses a seat opening and closing auxiliary mechanism and seat, including base and opening and closing subassembly, opening and closing subassembly includes symmetrical arrangement seat support of support frame both sides, and seat support includes the longitudinal support pole for installing flexible support fabric, and the multiple horizontal support pole between longitudinal support pole and base, and one end rotation is connected on the base of every horizontal support pole, and the other end rotation is connected with longitudinal support pole of horizontal support pole, still be equipped with the linkage assembly that can be linked opening and closing subassembly of auxiliary drive component on the base, and auxiliary drive component includes the drive piece of spot rotation, and the telescopic piece of screwing cooperation with drive piece, and telescopic piece links to each other with linkage assembly, and the operator can make opening and closing subassembly open through the rotation drive piece to the flexible support fabric, thereby will seat support open the laborious push -and -pull process conversion drive piece's rotation process, and the operation is simple and laborsaving, and it is applied to the seat, can effectively improve the use experience of seat.

Description

Technical Field

[0001] This utility model relates to the field of seating, and in particular to a seat opening and closing auxiliary mechanism and a seat. Background Technology

[0002] To facilitate packaging and transportation, many office chairs and ergonomic chairs on the market have modified the traditional fixed backrest or seat assembly into a movable structure. This allows the backrest or seat assembly to be folded during transport, reducing the packaging volume. Once the user receives the chair, they can unfold the backrest or seat assembly for normal use. For example, in the chair patent with publication number CN214803606, there are two seat supports, namely a seat support and a back support. The seat support includes a support base and a unfolding assembly. The unfolding assembly includes a longitudinal support member and multiple transverse rotating members. The head end of each transverse rotating member is hinged to the support base, and the tail end is hinged to the longitudinal support member. The longitudinal support member and the support base form a support area, in which a mesh fabric is laid. When the longitudinal support member is folded relative to the support base, the mesh fabric folds; when the longitudinal support member is unfolded relative to the support base, the mesh fabric is taut.

[0003] This structure can reduce the volume occupied by the seat or backrest components in the width direction during seat transportation and packaging, thus reducing transportation costs. However, the mesh itself has strong elasticity. When the unfolding assembly is unfolded, the mesh will generate a large rebound resistance when it switches from a loose state to a taut state. When operating manually, the user must use a lot of force to pull the unfolding assembly and forcibly overcome the rebound resistance in order to open the seat frame normally. This is relatively strenuous, especially for users with less strength. The high elasticity of the mesh makes it difficult to open the seat frame independently, affecting the user experience of the seat. Summary of the Invention

[0004] This utility model provides a seat opening and closing auxiliary mechanism and a seat. By setting an auxiliary drive component on the base that relies on a screw and nut structure, the operator can open the opening and closing component by rotating the drive component and tighten the flexible support fabric. This transforms the laborious pushing and pulling process of opening the seat frame into the rotation process of the drive component, making the operation simple and labor-saving. When applied to a seat, it can effectively improve the user experience of the seat.

[0005] The technical solution of this utility model is implemented as follows: A seat opening and closing auxiliary mechanism includes a base and an opening and closing assembly. The opening and closing assembly includes seat supports symmetrically arranged on both sides of a support frame. Each seat support includes a longitudinal support rod for mounting flexible support fabric and multiple transverse support rods located between the longitudinal support rods and the base. One end of each transverse support rod is rotatably connected to the base, and the other end of each transverse support rod is rotatably connected to the longitudinal support rod. When the symmetrical transverse support rods rotate, the two longitudinal support rods can move closer to or further apart, thereby causing the opening and closing assembly to close or open. The base also includes an auxiliary drive assembly and a linkage assembly that can be linked to open the opening and closing assembly. The auxiliary drive assembly includes a drive component that rotates in place and a telescopic component that is helically engaged with the drive component. One of the telescopic component and the drive component is an outer helical rod, and the other of the telescopic component and the drive component is an inner helical sleeve. The telescopic component is connected to the linkage assembly. When the drive unit rotates in place, it can drive the telescopic component to extend and retract, and provide driving force for the movement of the linkage component, thereby causing the opening and closing component to open so that the flexible support fabric is tensioned.

[0006] Preferably, the opening and closing component also has a transition state between a closed state and an open state; in the closed state, the flexible support fabric is in a relaxed state, and in the transition state, the flexible support fabric switches from the relaxed state to the pre-tensioned state; when the opening and closing component switches from the closed state to the transition state, the driving member does not drive the telescopic member; when the opening and closing component switches from the transition state to the open state, the driving member rotates in place and drives the telescopic member to extend and retract, so that the flexible support fabric switches from the pre-tensioned state to the tensioned state.

[0007] Preferably, the telescopic component is an external helical rod, and the driving component is an internal helical sleeve with an internal threaded hole section. The external helical rod includes an external helical section and a connecting section connected to the linkage component. The connecting section is connected to the end of the external helical section near the seat bracket. The outer diameter of the connecting section is smaller than the outer diameter of the external helical section, and the connecting section does not have an external helical thread that matches the internal threaded hole section. When the opening and closing component is in the closed state, the connecting section and the internal threaded hole section are in the same position. When the opening and closing component switches from the closed state to the transition state, the connecting section slides relative to the internal helical sleeve, so that the external helical section and the internal threaded hole section are engaged. This allows the opening and closing component to switch quickly between the closed state and the transition state without being affected by the helical engagement of the external helical rod and the internal helical sleeve.

[0008] Preferably, the telescopic component is an inner spiral sleeve, and the driving component is an outer spiral rod. The outer spiral rod includes an outer spiral section and a non-spiral section connected to the outer spiral section. The outer diameter of the non-spiral section is smaller than that of the outer spiral section. The inner hole of the inner spiral sleeve has an adjacent inner threaded hole section and a free hole section. The free hole section does not have an inner spiral pattern that matches the outer spiral section. The inner diameter of the free hole section is larger than that of the inner threaded hole section. When the opening and closing assembly is in the closed state, the inner threaded hole section corresponds to the non-spiral section, and the free hole section corresponds to the outer spiral section. The end of the inner spiral sleeve near the free hole section is connected to the linkage assembly. When the opening and closing assembly switches from the closed state to the transition state, the free hole section slides relative to the outer spiral rod, causing the inner threaded hole section to move and engage with the outer spiral section, so that when the opening and closing assembly switches from the transition state to the open state, the inner threaded hole section and the outer spiral section are in spiral engagement.

[0009] Preferably, the movement directions of the linkage component include opposite first and second directions; when the opening and closing component is open, the linkage component moves in the first direction, and when the opening and closing component is closed, the linkage component moves in the second direction; the auxiliary drive component is located on the second direction side; so as to apply a thrust to the two seat supports to open the opening and closing component.

[0010] Preferably, when the opening and closing assembly is in the closed state, the telescopic component is separated from the driving component; when the opening and closing assembly switches from the closed state to the transition state, the telescopic component approaches and docks with the driving component, so that when the opening and closing assembly switches from the transition state to the open state, the telescopic component and the driving component form a spiral engagement.

[0011] Preferably, the movement directions of the linkage component include opposite first and second directions; when the opening and closing component is open, the linkage component moves in the first direction, and when the opening and closing component is closed, the linkage component moves in the second direction; the auxiliary drive component is located on one side of the first direction; so as to apply traction force to the two seat supports to open the opening and closing component.

[0012] Preferably, the drive unit is equipped with a handwheel that is easy to grip, so that the operator can rotate and control the extension and retraction of the telescopic component.

[0013] Preferably, the linkage component includes a movable seat connected to the telescopic component, and a connecting rod is provided between each seat bracket and the movable seat, with both ends of the connecting rod hinged to the seat bracket and the movable seat respectively; the movable seat can drive the connecting rod to rotate while driving the two seat brackets to open.

[0014] Preferably, in the two seat supports, every two symmetrical transverse support rods form a rotating support rod group, and the movable seat corresponds to the position of any rotating support rod group; one end of each link is hinged to the movable seat, and the other end of the link is hinged to the transverse support rod of the corresponding rotating support rod group.

[0015] Preferably, the linkage component includes a movable seat disposed between two symmetrically arranged seat supports, the movable seat being connected to the telescopic member; when the telescopic member extends or retracts, the movable seat can be linked to push the two seat supports to rotate synchronously, and the opening and closing component can be switched to the open state.

[0016] Preferably, the base is provided with a shaft hole, and the drive component is rotatably connected in the shaft hole and can rotate around its own axis; to prevent the drive component from moving axially.

[0017] A seat, including the aforementioned seat opening and closing auxiliary mechanism.

[0018] Preferably, the base is a back support for connecting to the chair seat, and the opening and closing assembly is a back support for installing flexible support fabric; or, the base is a chair seat support, and the opening and closing assembly is a seat support for installing flexible support fabric.

[0019] The beneficial effects of this utility model, which adopts the above technical solution, are as follows: This invention features a helically fitted telescopic component and a driving component on a base, with the telescopic component connected to a linkage assembly. The operator can rotate the driving component in place to extend or retract the telescopic component, thereby triggering the seat support to open via the linkage assembly. During the opening process, the elastic resistance of the flexible support fabric is gradually overcome, causing the flexible support fabric to tighten. This design simplifies the laborious pulling process of the seat support to the rotation process of the driving component, making it simple and effortless to operate, suitable for users with less strength, and improving the user experience of the seat.

[0020] When the opening and closing assembly switches from the transition state to the open state, the flexible support fabric switches from the pre-tensioned state to the tensioned state. At this time, the rebound resistance generated by the flexible support fabric is the greatest. When the opening and closing assembly switches from the closed state to the transition state, the flexible support fabric switches from the relaxed state to the pre-tensioned state. This process is actually effortless. Therefore, in this invention, when the flexible support fabric switches from the relaxed state to the pre-tensioned state, the outer spiral section and inner threaded hole section of the telescopic component and the driving component are separated. The driving component does not drive the telescopic component, avoiding the self-locking effect caused by the spiral engagement from affecting the opening and closing assembly. Only when the flexible support fabric switches from the pre-tensioned state to the tensioned state does the telescopic component move and slide, causing the telescopic component to engage with the outer spiral section and inner threaded hole section of the driving component to form a spiral engagement. The operator can overcome the high rebound resistance generated by the flexible support fabric by rotating the driving component until the flexible support fabric is fully tensioned, further saving the opening time of the opening and closing assembly, improving the opening efficiency of the opening and closing assembly, and making it more practical. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure when the opening and closing components are closed; Figure 2A cross-sectional view showing the position of the auxiliary drive component when the opening and closing components are closed; Figure 3 This is a schematic diagram of the structure when the opening and closing components are in a transitional state. Figure 4 A cross-sectional view of the position of the auxiliary drive component when the opening and closing component is in a transitional state; Figure 5 A schematic diagram of the structure when the opening and closing components are fully open; Figure 6 A cross-sectional view showing the position of the auxiliary drive component when the opening and closing component is fully open; Figure 7 Exploded view of the seat opening and closing auxiliary mechanism; Figure 8 This is an exploded view of the seat opening and closing assist mechanism from another angle; Figure 9 This is a schematic diagram of the opening and closing components when they are closed, as shown in Example 2. Figure 10 This is a cross-sectional view of the position of the auxiliary drive component when the opening and closing component is closed, as shown in Embodiment 2. Figure 11 This is a schematic diagram of the opening and closing component in the transition state in Example 2; Figure 12 This is a cross-sectional view of the auxiliary drive component when the opening and closing component is in a transition state, as shown in Example 2. Figure 13 This is a schematic diagram of the opening and closing components when fully opened in Example 2; Figure 14 This is a cross-sectional view of the position of the auxiliary drive component when the opening and closing component is fully open, as shown in Embodiment 2. Figure 15 This is an exploded view of the seat opening and closing auxiliary mechanism in Example 2; Figure 16 This is a structural diagram of the seat; Figure 17 This is a simplified schematic diagram of the linkage component in Example 3; Figure 18 This is a schematic diagram illustrating the steps of the driving component in Example 4 to drive the opening and closing component to open. The reference numerals in the attached drawings are as follows: 1-base, 11-mounting seat, 12-abutting part, 13-through hole, 14-abutting end face, 15-through hole, 16-shaft hole, 17-connecting seat, 18-limiting part, 2-seat bracket, 21-longitudinal support rod, 22-transverse support rod, 3-movable seat, 31-connecting rod, 4-outer helical rod, 41-outer helical section, 42-connecting section, 43-non-helical section, 5-inner helical sleeve, 51-inner threaded hole section, 52-handwheel, 53-limiting protrusion, 54-free hole section, 6-flexible support fabric, A-first direction, B-second direction. Detailed Implementation

[0022] 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.

[0023] 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.

[0024] This utility model has multiple embodiments, and the specific implementation methods are as follows: Example 1: As Figure 1-8 , Figure 16 As shown, this embodiment provides a seat opening and closing auxiliary mechanism, including a base 1 and an opening and closing assembly. The base 1 is a support member, and the opening and closing assembly includes seat brackets 2 symmetrically arranged on both sides of the support frame. The seat brackets 2 include longitudinal support rods 21 for mounting flexible support fabric 6 and multiple transverse support rods 22 located between the longitudinal support rods 21 and the base 1. The flexible support fabric 6 can be a mesh fabric or other fabric with good resilience. One end of each transverse support rod 22 is rotatably connected to the base 1, and the other end of the transverse support rod 22 is rotatably connected to the longitudinal support rod 21. When the symmetrical transverse support rod 22 rotates, the two longitudinal support rods 21 can move closer or further apart, so that the opening and closing assembly can close or open. In order to facilitate the operator to open the opening and closing assembly with little effort and to make the flexible support fabric 6 taut, an auxiliary drive assembly and a linkage assembly that can be linked to open the opening and closing assembly are also provided on the base 1. The auxiliary drive assembly includes a drive component that rotates in place and a telescopic component that is screwed with the drive component. One of the telescopic component and the drive component is an outer spiral rod 4, and the other of the telescopic component and the drive component is an inner spiral sleeve 5. The telescopic component is connected to the linkage assembly. When the drive unit rotates in place, it can drive the telescopic component to extend and retract, and provide driving force for the movement of the linkage component, thereby causing the opening and closing component to open so that the flexible support fabric 6 is tensioned. The drive unit is connected to a handwheel 52 for easy gripping, so that the operator can rotate to control the extension and retraction of the telescopic component. Compared with directly pulling the two seat supports 2 to open, in this embodiment, the operator can rotate the handwheel 52 in place, so that the rotating drive unit generates driving force on the telescopic component that is screwed to it, causing the telescopic component to extend and retract, so that the linkage component can gradually push the two seat supports 2 to open. It is equivalent to converting the traditional pulling opening process into the in-place rotation process of the drive unit. The operator no longer needs to directly pull the seat supports 2, making the opening and closing process of the component more effortless and effectively improving the user experience of the seat.

[0025] Furthermore, the opening and closing component also has a transitional state between a closed state and an open state; such as Figure 1 As shown, in the closed state, the flexible support fabric 6 is in a relaxed state; as Figure 3 As shown, in the transition state, the flexible support fabric 6 switches from a relaxed state to a pre-tensioned state. During the process of switching from a relaxed state to a pre-tensioned state, the flexible support fabric 6 does not generate high rebound resistance. Therefore, this process can be achieved manually without the intervention of an auxiliary drive component. Thus, in this embodiment, when the opening and closing component switches from a closed state to a transition state, the drive component does not drive the telescopic component, allowing the operator to manually control the two seat supports 2 to switch to the transition state without being affected by the spiral engagement between the telescopic component and the drive component. Only when the opening and closing component switches from the transition state to the open state does the rebound resistance generated by the flexible support fabric 6 reach its maximum. At this time, the drive component and the telescopic component form a spiral engagement, and the drive component rotates in place and drives the telescopic component to extend and retract, causing the flexible support fabric 6 to switch from a pre-tensioned state to a tensioned state. This not only improves the efficiency of opening the opening and closing component but also makes it easier to open the component.

[0026] Furthermore, in this embodiment, the movement directions of the linkage component include opposite first directions A and second directions B; when the opening and closing component opens, the linkage component moves towards the first direction A, and when the opening and closing component closes, the linkage component moves towards the second direction B; the auxiliary drive component is located on the second direction B side, so that when the telescopic member extends, it can generate a thrust on the movable seat 3, causing the movable seat 3 to move closer to the two seat supports 2, and the linkage opening and closing component opens; to ensure that when the flexible support fabric 6 switches from a relaxed state to a pre-tensioned state, the drive component does not exert force on the telescopic member. The telescopic component in this embodiment is an outer spiral rod 4, and the driving component is an inner spiral sleeve 5 with an inner threaded hole section 51. The outer end of the outer spiral sleeve 5 is connected to the handwheel 52. The outer spiral rod 4 includes an outer spiral section 41 and a connecting section 42 connected to the linkage assembly. The connecting section 42 is connected to the end of the outer spiral section 41 near the seat bracket 2. The outer diameter of the connecting section 42 is smaller than the outer diameter of the outer spiral section 41, and the outer diameter of the connecting section 42 is also smaller than the inner diameter of the inner threaded hole section 51. Furthermore, the connecting section 42 does not have an outer spiral pattern that matches the inner threaded hole section 51. Figure 2 As shown, when the opening and closing assembly is in the closed state, the outer spiral section 41 separates from the inner threaded hole section 51, and the connecting section 42 corresponds to the inner threaded hole section 51, as shown. Figure 4 As shown, when the opening and closing assembly switches from the closed state to the transition state, the connecting section 42 slides relative to the inner spiral sleeve 5. At this time, the outer spiral section 41 gradually approaches the movable seat 3 until the outer spiral section 41 aligns with the inner threaded hole section 51; Figure 5-6As shown, when the opening and closing assembly switches from the transition state to the open state, the inner screw hole section 51 and the outer screw section 41 are screwed together. At the same time when the elasticity of the flexible support fabric 6 is at its highest, the inner screw sleeve 5 can be rotated around its own axis by rotating the handwheel 52, which overcomes the elastic resistance generated by the flexible support fabric 6 and switches it to the fully tensioned state.

[0027] Furthermore, the linkage component includes a movable seat 3 connected to the telescopic member. The connection between the telescopic member and the movable seat 3 can be a fixed connection or a hinged connection. Each seat bracket 2 and the movable seat 3 are provided with a connecting rod 31, with both ends of the connecting rod 31 hinged to the seat bracket 2 and the movable seat 3, respectively. In this embodiment, when the telescopic member extends, the movable seat 31 can generate a translational movement, which drives the connecting rod 31 to rotate and simultaneously drives the two seat brackets 2 to open.

[0028] Furthermore, in this embodiment, the connecting rods 31 are symmetrically arranged between the movable seat 3 and the two seat supports 2. One end of the connecting rod 31 is hinged to the movable seat 3, and the other end of the connecting rod 31 can be hinged to the corresponding longitudinal support rod 21, or to the corresponding transverse support rod 22, or to the rotatable connection between the transverse support rod 21 and the longitudinal support rod 22 in each seat support 2. However, in this embodiment, the other end of the connecting rod 31 is preferably hinged to the transverse support rod 21. Specifically, in the two seat supports 2, Two symmetrical transverse support rods 22 form a rotating support rod group, and the movable seat 3 corresponds to any rotating support rod group. One end of each connecting rod 31 is hinged to the movable seat 3, and the other end of the connecting rod 31 is hinged to the transverse support rod 22 of the corresponding rotating support rod group. The transverse support rod 22 is close to the base 1, so the required length of the connecting rod 31 is also shorter. By hinged connecting the connecting rod 31 between the corresponding transverse support rod 22 and the movable seat 3, the two seat brackets 2 can be opened or closed in conjunction with each other, while reducing the space and cost occupied by the connecting rod 31.

[0029] Furthermore, such as Figure 7-8As shown, the connection structure between the drive component and the base 1 in this embodiment is as follows: The base 1 is provided with a shaft hole 16 that matches the drive component. The outer end of the shaft hole 16 is open outward. The drive component is rotatably connected in the shaft hole 16 and can rotate around its own axis to prevent the drive component from moving axially. Specifically, the bottom of the shaft hole 16 is provided with a through hole 15 to avoid the outer helical rod 4. The inner diameter of the through hole 15 is smaller than that of the shaft hole 16 so that the outer helical rod 4, which is a telescopic component, can pass through and connect with the movable seat 3. A mounting base 11 is detachably connected to the base 1. A through hole 13 corresponding to the shaft hole 16 is provided to avoid the inner spiral sleeve 5, so that the inner spiral sleeve 5, which serves as a driving member, can pass through and cooperate with the outer spiral rod 4. At the same time, in order to prevent the inner spiral sleeve 5 from moving axially, two axially spaced limiting protrusions 53 are provided on the outer wall of the inner spiral sleeve 5. The bottom of the shaft hole 16 has an abutting end face 14, which abuts against one of the limiting protrusions 53. The mounting base 11 is provided with a protruding abutting part 12, which abuts against the other limiting protrusion, so that the inner spiral sleeve 5 remains in a fixed position in the axial direction.

[0030] like Figure 16 As shown, this embodiment provides a seat, including the aforementioned seat opening and closing auxiliary mechanism; wherein the base 1 is a back support for connecting with the seat, and the opening and closing component is a back support for mounting the flexible support fabric 6; the back support and the back support constitute a seat back that can change its own space and open or close freely, and the operator can rotate the drive component to tension the flexible support fabric 6 on the back support; or, the base 1 is a seat support, and the opening and closing component is a seat support for mounting the flexible support fabric 6; the seat support and the seat support constitute a seat that can change its own space and open or close freely, and the operator can rotate the drive component to tension the flexible support fabric 6 on the back support.

[0031] Furthermore, in this embodiment, the separate design of the outer spiral section 41 and the inner threaded hole section 51 not only saves the time of opening the opening and closing components, but also saves the time of closing the opening and closing components. Specifically, during packaging and transportation, the opening and closing components will switch to the closed state to save packaging space and cost. At this time, the separated outer spiral section 41 and inner threaded hole section 51 do not form a spiral fit, allowing the connecting section 42 to slide freely in the inner spiral sleeve 5, so that the opening and closing components can close quickly, saving packing time.

[0032] Example 2: As Figure 9-15 As shown, the difference between this embodiment and the above embodiment lies in the location of the auxiliary drive component. Specifically, the auxiliary drive component is located on the first direction A side; to apply traction force to the two seat supports 2, causing the opening and closing component to open; specifically, as... Figure 9-10As shown, when the opening and closing assembly is in the closed state, one end of the telescopic component is connected to the movable seat 3, and the other end is separated from the driving component. The telescopic component is an outer spiral rod 4 with an outer spiral section 41, and the driving component is an inner spiral sleeve 5 connected to the handwheel 52 and having an inner threaded hole section 51; or, the telescopic component is an inner spiral sleeve 5 with an inner threaded hole section 51, and the driving component is an outer spiral rod 4 connected to the handwheel 52 and having an outer spiral section 41; Figure 11-12 As shown, when the opening and closing assembly switches from the closed state to the transition state, the telescopic component approaches the driving component, causing the outer spiral section 41 to mate with the inner threaded hole section 51; as Figure 13-15 As shown, when the opening and closing assembly switches from the transition state to the open state, the outer spiral section 41 and the inner spiral hole section 51 form a spiral engagement, so that when the drive component rotates in place, it can drive the telescopic component to retract and generate a pulling force in the first direction A on the movable seat 3, thereby linking the opening and closing assembly to switch to the open state and achieving the same linkage effect as in the above embodiment.

[0033] Furthermore, a connecting seat 17 is detachably connected to the base 1. The connecting seat 17 has a concave hole with a semi-circular cross-section. The base 1 also has a corresponding concave hole. When the connecting seat 17 is installed on the base 1, the two concave holes are combined to form a shaft hole 16 for rotating and connecting the drive component. In this embodiment, the telescopic component is an outer spiral rod 4 and the drive component is an inner spiral sleeve 51. The outer wall of the inner spiral sleeve 5 has two axially spaced limiting protrusions 53. The shaft hole 16 has two limiting parts 18. The two limiting parts 18 are located between the two limiting protrusions 53 and abut against the corresponding limiting protrusions 53, restricting the inner spiral sleeve 5 from moving axially.

[0034] Example 3: As Figure 17 As shown, the difference between this embodiment and the above embodiment is that the linkage component in this embodiment does not have a connecting rod 31. Specifically, the linkage component includes a movable seat 3 disposed between two symmetrically arranged seat supports 2. The movable seat 3 is located at the position corresponding to any rotating rod group, and the movable seat 3 is connected to the telescopic member. When the telescopic member extends or retracts, it can simultaneously push the two symmetrical transverse support rods 22 to rotate, and switch the opening and closing component to the open state. In order to make the movable seat 3 form a stable pushing force on the two symmetrical transverse support rods 22 without damaging the surface of the transverse support rods 22, a smooth contact slope can be provided on the movable seat 3. Alternatively, a roller that contacts the transverse support rod 22 can be rotatably disposed on the movable seat 3 to reduce the friction between the movable seat 3 and the transverse support rod 22.

[0035] Example 4: In this example, the auxiliary drive component is located on one side of the second direction B; as shown... Figure 18As shown, the difference from the above embodiments is that in this embodiment, the telescopic component is an inner spiral sleeve 5, and the driving component is an outer spiral rod 4. Based on this, the flexible support fabric 6 can still be quickly switched from a relaxed state to a pre-tensioned state. Specifically, the outer spiral rod 4 includes an outer spiral section 41 and a non-spiral section 43 connected to the outer spiral section 41. The outer diameter of the non-spiral section 43 is smaller than the outer diameter of the outer spiral section 41. The inner hole of the inner spiral sleeve 5 has adjacent inner threaded hole sections 51 and free hole sections 53. The free hole section 53 does not have an inner spiral pattern matching the outer spiral section 41. The inner diameter of the free hole section 53 is larger than the inner diameter of the inner threaded hole section 51. The outer diameter of the non-spiral section 43 is smaller than the inner threaded hole section 51. The inner diameter of the threaded hole section 51; the end of the inner spiral sleeve 5 near the free hole section 53 is connected to the movable seat 3 of the linkage component; when the opening and closing component is in the closed state, the inner threaded hole section 51 and the outer spiral section 41 are in a separated state, the free hole section 53 is in the position corresponding to the outer spiral section 41, and the inner threaded hole section 51 is in the position corresponding to the non-spiral section 43; when the opening and closing component switches from the closed state to the transition state, the free hole section 53 slides relative to the outer spiral rod 4, so that the inner threaded hole section 51 moves from the position of the non-spiral section 43 to the position of the outer spiral section 41 and forms a docking, so that when the opening and closing component switches from the transition state to the open state, the inner threaded hole section 51 and the outer spiral section 41 are screwed together.

[0036] 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 inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A seat opening and closing auxiliary mechanism, characterized in that, The system includes a base (1) and an opening / closing assembly. The opening / closing assembly includes seat brackets (2) symmetrically arranged on both sides of the support frame. The seat brackets (2) include longitudinal support rods (21) for installing flexible support fabric (6) and multiple transverse support rods (22) located between the longitudinal support rods (21) and the base (1). One end of each transverse support rod (22) is rotatably connected to the base (1), and the other end of the transverse support rod (22) is rotatably connected to the longitudinal support rod (21). When the symmetrical transverse support rods (22) rotate, the two longitudinal support rods (21) can move closer or further away from each other, so that the opening / closing assembly can close or open. The base (1) is also provided with an auxiliary drive assembly and a linkage assembly that can be linked to open the opening / closing assembly. The auxiliary drive assembly includes a drive component that rotates in place and a telescopic component that is screwed with the drive component. One of the telescopic component and the drive component is an outer spiral rod (4), and the other of the telescopic component and the drive component is an inner spiral sleeve (5). The telescopic component is connected to the linkage assembly. When the drive unit rotates in place, it can drive the telescopic component to extend and retract, and provide driving force for the linkage component to move, thereby causing the opening and closing component to open so that the flexible support fabric (6) is tensioned.

2. The seat opening and closing auxiliary mechanism according to claim 1, characterized in that: The opening and closing assembly also has a transition state between a closed state and an open state; in the closed state, the flexible support fabric (6) is in a relaxed state, and in the transition state, the flexible support fabric (6) switches from the relaxed state to the pre-tensioned state; when the opening and closing assembly switches from the closed state to the transition state, the driving member does not drive the telescopic member; when the opening and closing assembly switches from the transition state to the open state, the driving member rotates in place and drives the telescopic member to extend and retract, so that the flexible support fabric (6) switches from the pre-tensioned state to the tensioned state.

3. The seat opening and closing auxiliary mechanism according to claim 2, characterized in that: The telescopic component is an external spiral rod (4), and the driving component is an internal spiral sleeve (5) with an internal threaded hole section (51). The external spiral rod (4) includes an external spiral section (41) and a connecting section (42) connected to the linkage component. The connecting section (42) is connected to the end of the external spiral section (41) near the seat bracket (2). The outer diameter of the connecting section (42) is smaller than the outer diameter of the external spiral section (41), and the connecting section (42) does not have an external spiral pattern that matches the internal threaded hole section (51). When the opening and closing component is in the closed state, the connecting section (42) and the internal threaded hole section (51) are in the same position. When the opening and closing component switches from the closed state to the transition state, the connecting section (42) slides relative to the internal spiral sleeve (5), so that the external spiral section (41) and the internal threaded hole section (51) are connected, so that when the opening and closing component switches from the transition state to the open state, the internal threaded hole section (51) and the external spiral section (41) are spirally engaged.

4. The seat opening and closing auxiliary mechanism according to claim 2, characterized in that: The telescopic component is an inner spiral sleeve (5), and the driving component is an outer spiral rod (4); the outer spiral rod (4) includes an outer spiral section (41) and a non-spiral section (43) connected to the outer spiral section (41), the outer diameter of the non-spiral section (43) is smaller than the outer diameter of the outer spiral section (41); the inner hole of the inner spiral sleeve (5) is provided with an adjacent inner threaded hole section (51) and a free hole section (53), the free hole section (53) is not provided with an inner spiral thread matching the outer spiral section (41); the inner diameter of the free hole section (53) is larger than the inner diameter of the inner threaded hole section (51); the inner spiral sleeve (5) is close to One end of the near-free hole section (53) is connected to the linkage component; when the opening and closing component is in the closed state, the inner threaded hole section (51) corresponds to the non-spiral section (43), and the free hole section (53) corresponds to the outer spiral section (41); when the opening and closing component switches from the closed state to the transition state, the free hole section (53) slides relative to the outer spiral rod (4), causing the inner threaded hole section (51) to move and connect with the outer spiral section (41), so that when the opening and closing component switches from the transition state to the open state, the inner threaded hole section (51) and the outer spiral section (41) are spirally engaged.

5. The seat opening and closing auxiliary mechanism according to claim 3 or 4, characterized in that: The movement directions of the linkage component include opposite first direction (A) and second direction (B); when the opening and closing component is open, the linkage component moves in the first direction (A), and when the opening and closing component is closed, the linkage component moves in the second direction (B); the auxiliary drive component is located on the side of the second direction (B).

6. The seat opening and closing auxiliary mechanism according to claim 2, characterized in that: When the opening and closing assembly is in the closed state, the telescopic component is separated from the driving component; when the opening and closing assembly switches from the closed state to the transition state, the telescopic component approaches and docks with the driving component, so that when the opening and closing assembly switches from the transition state to the open state, the telescopic component and the driving component form a spiral engagement.

7. The seat opening and closing auxiliary mechanism according to claim 6, characterized in that: The movement directions of the linkage component include opposite first direction (A) and second direction (B); when the opening and closing component is open, the linkage component moves in the first direction (A), and when the opening and closing component is closed, the linkage component moves in the second direction (B); the auxiliary drive component is located on the first direction (A) side.

8. The seat opening and closing auxiliary mechanism according to claim 1, characterized in that: The drive unit is connected to a handwheel (52) for easy gripping.

9. The seat opening and closing auxiliary mechanism according to claim 1, characterized in that: The linkage component includes a movable seat (3) connected to the telescopic component. Each seat bracket (2) and the movable seat (3) are provided with a connecting rod (31), and the two ends of the connecting rod (31) are respectively hinged to the seat bracket (2) and the movable seat (3).

10. The seat opening and closing auxiliary mechanism according to claim 9, characterized in that: In the two seat supports (2), every two symmetrical transverse support rods (22) form a rotating support rod group, and the movable seat (3) corresponds to the position of any rotating support rod group; one end of each connecting rod (31) is hinged to the movable seat (3), and the other end of the connecting rod (31) is hinged to the transverse support rod (22) of the corresponding rotating support rod group.

11. The seat opening and closing auxiliary mechanism according to claim 1, characterized in that: The linkage component includes a movable seat (3) disposed between two symmetrically arranged seat supports (2), and the movable seat (3) is connected to the telescopic component; when the telescopic component extends or retracts, the movable seat (3) can be linked to push the two seat supports (2) to rotate synchronously, and the opening and closing component is switched to the open state.

12. The seat opening and closing auxiliary mechanism according to claim 1, characterized in that: The base (1) is provided with a shaft hole (16), and the driving component is rotatably connected in the shaft hole (16) and can rotate around its own axis.

13. A seat, characterized in that, Includes the seat opening and closing auxiliary mechanism as described in claim 1.

14. The seat according to claim 13, characterized in that: The base (1) is a back support for connecting with the chair seat, and the opening and closing assembly is a back support for installing the flexible support fabric (6); or, the base (1) is a chair seat support, and the opening and closing assembly is a seat support for installing the flexible support fabric (6).

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