Side supporting module, screen cloth chair back and chair

Abstract

The utility model provides a side supporting module, a mesh chair back and a seat, the side supporting module comprises a shell structure independent of the chair back and a side supporting assembly, the side supporting assembly comprises two side supporting pieces which are bilaterally symmetrical, and the side supporting pieces are provided with inserting parts; the shell structure is provided with an opening which is opened outwards, the inserting parts of the two side supporting pieces are inserted into the opening in the shell structure in a penetrating mode, the two inserting parts move left and right with the shell structure as a carrier, and therefore the distance between the two side supporting pieces is adjusted in place. The whole side supporting module is mounted on the mesh chair back, so that the mesh chair back is endowed with a side supporting function, the rib side position or the waist side position of the upper body of a seated person can be effectively supported, lodging of the upper body caused by long-time sitting is avoided, and the sitting posture correcting capacity and the use experience feeling of the seat are improved.

Description

Technical Field

[0001] This utility model relates to the field of seating, and in particular to a side support module, a mesh backrest, and a seat. Background Technology

[0002] The office chairs on the market have various structures. Some office mesh chairs have a single back frame structure with mesh fabric stretched on the single back frame; others have a multi-back frame structure. Among the multi-back frame structures, the most common is the double back frame structure. The double back frame structure includes an upper back frame and a lower back frame set sequentially on the back support. Both the upper and lower back frames are stretched with mesh fabric, and the position of the upper back frame corresponds to the back of the user, while the position of the lower back frame corresponds to the waist of the user. Both structures make the back of the chair both breathable and supportive, and provide users with different sitting experiences through different structures.

[0003] To enhance lumbar support, single-back-frame office chairs often feature a forward-protruding lower back frame to conform to the body's lumbar curve. Double-back-frame mesh chairs, on the other hand, position the lower back frame further forward or also have it protrude forward to support the lower back. When users sit in such mesh chairs, their lower backs receive effective support, ensuring an upright posture.

[0004] However, while these office chairs consider lumbar support, they neglect support for the left and right sides of the upper body, such as... Figure 12 As shown, after long hours of office work, due to the lack of lateral support, users of different body types will involuntarily lean to the left or right, making it difficult for the upper body to maintain an upright position. Over time, this can easily lead to scoliosis and muscle strain, affecting the seating experience.

[0005] Some chairs have side supports on the backrest to support the upper body on both sides. For example, in the pressure-reducing chair patent with announcement number CN219613431, there are strip-shaped adjustment holes on the backrest. After the two clamping arms are adjusted to the correct position, they are locked to the backrest with screws, so that the upper body of users of different body types is supported on both sides. However, since the back frame of the mesh backrest has a hollow structure in the middle, the hollow part needs to be stretched with mesh fabric. There is no extra support structure to open the strip-shaped adjustment holes. Therefore, this structure is not suitable for office chairs with mesh backrests. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a side support module that is easy to install on a mesh chair back. The side support module includes a shell structure. By inserting the insertion parts of two side support members into the openings in the shell structure, the two insertion parts can move left and right with the shell structure as a carrier, thereby adjusting the distance between the two side support members to the correct position.

[0007] Furthermore, a mesh chair back and seat are provided. By installing a pre-installed side support module, which is independent of the mesh chair back, on the mesh chair back, the mesh chair back is given a side support function. This allows the rib or waist area of ​​the upper body of the sitter to be effectively supported, preventing the upper body from collapsing due to prolonged sitting, and improving the posture correction ability and user experience of the seat.

[0008] The technical solution of this utility model is implemented as follows:

[0009] A side support module includes a side support assembly and a hollow shell structure. The side support assembly includes two symmetrical side support members, each with an insertion part. The shell structure has an outwardly open opening, and the two insertion parts are inserted into the opening.

[0010] The two insert parts move left and right on the shell structure and stop at their respective positions. When the two insert parts move or stop, the two side support members move or stop at their respective positions in sync with the corresponding insert parts.

[0011] Preferably, the housing structure includes a first housing and a second housing. The second housing has the opening on its front side. The front side of the first housing is provided with a strip groove that corresponds to the position of the insertion part and is used to avoid the left and right movement of the insertion part. The first housing mates with the front side of the second housing to close the opening and allow the insertion part to be inserted into the strip groove. While sealing the opening, the first housing is provided with a strip groove to avoid the left and right movement of the insertion part, ensuring that the side support can move normally left and right.

[0012] Preferably, the insert is fitted with a connector inside the housing structure. The thickness of the connector is greater than the thickness of the insert. The first housing engages with the front side of the second housing and abuts against the connector, thereby restricting the insert from exiting the housing structure along the groove.

[0013] Preferably, one side of the entire housing structure is open to form the opening, which avoids the two inserts when they move left and right.

[0014] Preferably, the head of the insert is connected to a mounting part located within the housing structure. The thickness of the mounting part is greater than the thickness of the insert, thus forming a protrusion that extends beyond the insert. The housing structure is provided with a stop that extends laterally. The stop abuts against the protrusion, thereby restricting the insert from exiting the housing structure through the opening when moving left and right.

[0015] Preferably, the insert is provided with a rack inside the housing structure, the two racks are staggered left and right, and the teeth of the two racks are simultaneously engaged with the linkage gear; when an external force is applied, one of the side supports can cause the linkage gear to rotate, thereby driving the two side supports to move closer or further apart; the rack can be made into a straight line or an arc shape, and both shapes of racks can cooperate with the linkage gear to efficiently link the two side supports to move closer or further apart.

[0016] Preferably, both ends of the linkage gear have a rotating shaft, and the inner wall of the housing structure facing the rotating shaft is provided with a rotating shaft hole, and the rotating shaft is rotatably connected in the rotating shaft hole; this ensures that the linkage gear can rotate along its own axis without detaching from the housing structure.

[0017] Preferably, at least one of the left and right side supports is provided with a control mechanism between itself and the shell structure. The control mechanism is configured to lock and unlock the position of the corresponding side support that moves left and right. The control mechanism can make the side support stable in the corresponding position after it is adjusted to the correct position, so as to provide stable support for both sides of the upper body.

[0018] Preferably, the control mechanism includes a control rod that can move synchronously with the side support member. The housing structure is provided with multiple position holes arranged at intervals in the left-right direction. When the control rod is disengaged from the corresponding position hole, the corresponding side support member can move left and right and adjust the distance between the two support surfaces. When the control rod is inserted into the corresponding position hole, the corresponding side support member can stay in the adjusted corresponding position.

[0019] Preferably, a connector is installed on the insertion part, and the connector has a through slot, in which the control rod is inserted; while ensuring that the control rod can move synchronously with the side support, the control rod can lock or unlock the side support when it is moved into place.

[0020] Preferably, a lead screw and nut mechanism is provided between the two insertion parts and located within the housing structure. The lead screw and nut mechanism includes two lead screws and a second lead screw with opposite thread directions. The two insertion parts are respectively provided with a first nut and a second nut. The first nut is screwed onto the first lead screw, and the second nut is screwed onto the second lead screw. A drive assembly is provided between the first lead screw and the second lead screw. The drive assembly can simultaneously drive the first lead screw and the second lead screw to rotate in the same direction, so as to drive the two side support members to move closer to or further away from each other.

[0021] Preferably, the drive assembly is a dual-output motor with two output shafts rotating in the same direction, and the two output shafts are respectively connected to a first lead screw and a second lead screw.

[0022] A mesh chair back includes the aforementioned side support module.

[0023] Preferably, the mesh chair back includes a back support, a back frame with a central hollow section and a mesh fabric stretched on it, the back frame is located on the front side of the back support, the shell structure is detachably connected to the back support, and two side supports on the side support module extend forward beyond the back frame.

[0024] Preferably, the mesh chair back includes a back frame with a central hollow section and a mesh fabric stretched on it, a shell structure is detachably connected to the rear side of the back frame, and two side supports on the side support module extend forward beyond the back frame.

[0025] Preferably, the back frame is a multi-back frame structure, which includes multiple sub-back frames arranged longitudinally. The middle of each sub-back frame is hollowed out and covered with a mesh. Any one of the multiple sub-back frames is divided into a first side support back frame. The position of the side support module corresponds to the position of the first side support back frame, and the mesh of the first side support back frame is provided with a strip-shaped clearance groove for avoiding the insertion part.

[0026] Preferably, the back frame is a multi-back frame structure, which includes multiple sub-back frames arranged longitudinally. The middle of each sub-back frame is hollowed out and covered with a mesh. Among the multiple sub-back frames, at least two adjacent sub-back frames are divided into second side support back frames. The position of the side support module corresponds to the position between the two second side support back frames, and there is a clearance between the two adjacent second side support back frames to avoid the insertion part.

[0027] Preferably, the back frame is a single back frame structure, with a hollow center and a mesh fabric stretched on it, and a strip-shaped clearance groove for avoiding the insertion part is provided on the mesh fabric.

[0028] A seat, including the aforementioned mesh backrest.

[0029] The beneficial effects of this utility model, which adopts the above technical solution, are as follows:

[0030] The side support module of this utility model includes a shell structure and two side support members. The shell structure is the carrier for the left and right movement of the two side support members. At the same time, the shell structure is independent of the mesh chair back, which is convenient for installation. Therefore, the side support module can be set on the mesh chair back through the shell structure, giving the mesh chair back a side support function. After sitting down, the user can adjust the two side support members to support the sides of the waist or ribs of the upper body, preventing the user from leaning to the sides due to prolonged sitting and causing scoliosis and muscle strain, thus protecting the user's health and improving the seating experience.

[0031] The side support module is detachably connected to the back support or back frame of the mesh chair back. Therefore, when the side support module malfunctions and needs to be repaired or replaced, the shell structure can be removed from the back frame or back support of the mesh chair back for replacement, reducing the maintenance cost and difficulty after the chair is purchased.

[0032] The side support module is applicable to various multi-back frame or single-back frame structures with different shapes, and can be installed on mesh chair backs with different shapes and structures through the shell structure, giving side support function to mesh chair backs with different shapes, and has high versatility. Attached Figure Description

[0033] Figure 1 This is a structural schematic diagram of the side support module;

[0034] Figure 2 This is an exploded view of the side support module;

[0035] Figure 3 This is a schematic diagram of the stop hole on the second housing;

[0036] Figure 4 A schematic diagram showing the side support module positioned between two second side support back frames;

[0037] Figure 5 A schematic diagram showing the side support module positioned at the corresponding location of the first side support back frame at the top;

[0038] Figure 6 A schematic diagram showing the side support modules positioned on both sides of the rear end of the back bracket or back frame;

[0039] Figure 7 A schematic diagram showing the side support module positioned at the corresponding location of the first side support back frame at the bottom;

[0040] Figure 8 This is a front view of the side support module installed on the single back frame structure in Embodiment 2;

[0041] Figure 9 This is a rear view of the side support module installed on the single back frame structure in Embodiment 2;

[0042] Figure 10 This is a schematic diagram of the screw and nut structure inside the receiving groove in Example 3;

[0043] Figure 11 This is a schematic diagram of the side support module in Example 4;

[0044] Figure 12 This is a simplified illustration of a user's upper body leaning to either side in the background art.

[0045] The reference numerals in the attached figures are as follows: 1-shell structure, 1a-disassembly module, 2-second shell, 3-first shell, 4-side support, 5-control component, 6-back bracket, 11-stop part, 21-accommodating groove, 22-guide groove, 23-position hole, 24-mounting hole, 31-strip groove, 41-insertion part, 42-rack, 43-linkage gear, 44-rotating shaft, 45-first nut, 46-second nut, 47-protrusion, 51-control rod, 52-connector, 71-sub-back frame, 71a-first side support back frame, 71b-second side support back frame, 72-mesh fabric, 73-strip clearance groove, 74-strip gap, 81-single back frame structure, 9-lead screw and nut mechanism, 91-first lead screw, 92-second lead screw, 93-dual output motor, 931-output shaft, 94-motor base. Detailed Implementation

[0046] 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.

[0047] 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.

[0048] This utility model has multiple embodiments, and the specific implementation methods are as follows:

[0049] Example 1: As Figure 1-7 As shown, this embodiment provides a side support module, including a side support assembly and a hollow shell structure 1. The side support assembly includes two symmetrical side support members 4, and each side support member 4 is provided with an insertion part 41. In this embodiment, the insertion part 41 is plate-shaped, but in reality, the structure of the insertion part 41 can be rod-shaped, strip-shaped, or other shapes that can be inserted into the strip groove 31. The shell structure 1 has an outwardly open opening, and the two insertion parts 41 are inserted into the opening. The side support members 4 are mounted on the shell structure 1, which serves as a carrier, through the insertion parts 41.

[0050] When adjusting the distance between the two side support members 4 to support the upper body of the user, the two insert parts 41 move left and right on the shell structure 1 and stop in the corresponding position. When the two insert parts 41 move or stop, the two side support members 4 move or stop in the corresponding position in sync with the corresponding insert parts 41.

[0051] Furthermore, in this embodiment, to facilitate the installation of the insert part 41, the housing structure 1 is a split structure. The specific structure of the housing structure 1 is as follows: The housing structure 1 includes a first housing 3 and a second housing 2. The front side of the second housing 2 has the aforementioned opening. After the insert part 41 is inserted into the opening, to avoid the left and right movement of the insert part 41, a strip groove 31 corresponding to the position of the insert part 41 and used to avoid the left and right movement of the insert part 41 is provided on the front side of the first housing 3. The width of the strip groove 31 matches the thickness of the insert part 41, or the width of the strip groove 31 can be slightly larger than the thickness of the insert part 41. The first housing 3 mates with the front side of the second housing 2 to close the opening and allow the insert part 41 to pass through the strip groove 31. The first housing 3 and the second housing 2 can be connected by screws, or by elastic clips or plastic clips. While sealing the opening and ensuring the simple appearance of the side support module 1, the first housing 3 is provided with a strip groove 31 to avoid the left and right movement of the insert part 41, ensuring that the side support 4 can move normally left and right.

[0052] Furthermore, in order to ensure that the portion of the insert 41 inserted into the opening can move stably left and right without coming out of the housing structure 1, a connector 52 is installed on the insert 41 within the housing structure 1. The thickness of the connector 52 is greater than the thickness of the insert 41, so the width of the strip groove 31 is also smaller than the width of the opening. When the first housing 3 is engaged with the front side of the second housing 2, the rear side of the first housing 3 can abut against the connector 52, thereby restricting the insert 41 from coming out of the housing structure 1 along the strip groove 31.

[0053] Furthermore, to ensure that the two side support members 4 remain symmetrical when moving left and right, thus providing effective support to both sides of the user's upper body, the insert part 41 is provided with racks 42 located within the housing structure 1. The two racks 42 are staggered left and right, and the teeth of the two racks 42 simultaneously mesh with a linkage gear 43. The linkage gear 43 and the two racks 42 form a linkage mechanism. When an external force is applied to one of the side support members 4, the linkage gear 43 can rotate, thereby causing the two side support members 4 to move closer or further apart. The rack 2 can be made in a straight line or an arc shape. Both shapes of rack 2 can cooperate with the linkage gear 43 to efficiently link the two side support members 4 closer or further apart.

[0054] Furthermore, the linkage gear 43 needs to rotate stably within the housing structure 1. Therefore, both ends of the linkage gear 43 have a rotating shaft 44. The inner wall of the housing structure 1 facing the rotating shaft 44 is provided with a rotating shaft hole (not shown). The rotating shaft 44 is rotatably connected in the rotating shaft hole. This ensures that the linkage gear 43 can rotate along its own axis without detaching from the housing structure 1.

[0055] Furthermore, the housing structure 1 has a receiving groove 21. After the insert part 41 is inserted into the opening, it enters the receiving groove 21. The rack 42 also moves within the receiving groove 21. The housing structure 1 is symmetrically provided with guide grooves 22 that communicate with the receiving groove 21. The width of the guide groove 22 matches the width of the connector 52. The two ends of the guide groove 22 have limiting end faces. The connector 52 is slidably connected within the guide groove 22 and slides between the two limiting end faces.

[0056] Furthermore, to ensure that the side support 4 can remain in its correct position after adjustment, at least one of the left and right side support 4 is provided with a control mechanism between itself and the shell structure 1. To ensure sufficient locking force on the side support 4, in this embodiment, control mechanisms are provided between the left and right side support 4 and the shell structure 1. The control mechanism 5 is configured to lock and unlock the position of the corresponding side support 4 as it moves left or right. The control mechanism 5 can ensure that the side support 4 remains stably in its correct position after adjustment, thus providing stable support for both sides of the upper body. Mechanism 5 includes a control rod 51 that can move synchronously with the side support member 4. The housing structure 1 has multiple stop holes 23 spaced apart in the left-right direction. These stop holes 23 can either penetrate the housing structure 1 or be located inside the housing structure 1 and not exposed. In this embodiment, the stop holes 23 are disposed through the second housing 3. When the control rod 51 disengages from the corresponding stop hole 23, the corresponding side support member 4 can move left or right and adjust the distance between the two support surfaces. When the control rod 51 is inserted into the corresponding stop hole 23, the corresponding side support member 4 can remain in the adjusted position. This simplifies the locking and unlocking process of the two side support members 4 to the pulling process of the control rod 51, making it convenient for the user to operate the control rod 51 to lock or unlock the side support members 4.

[0057] Furthermore, a connector 52 is installed on the insertion part, and the connector 52 has a through slot, in which the control rod 51 is inserted; while ensuring that the control rod 51 can move synchronously with the side support 4, the control rod 51 can lock or unlock the side support 4 when it is moved into place.

[0058] Furthermore, a mesh chair back is provided, including the aforementioned side support module. The side support module is installed on the mesh chair back as a detachable module 1a. The side support member 4 can be made into a support structure with a soft pad for comfort, or it can be made into a frame structure with mesh fabric to coordinate with the shape of the mesh chair back. This embodiment provides two ways of setting the side support module according to different structures of mesh chair backs. Specifically, the first setting method relies on the back support 6 as the installation carrier, wherein the mesh chair back includes the back support 6 and a back frame with a hollow center and mesh fabric 72 stretched on it. The back frame is set on the front side of the back support 6, and the shell structure 1 is detachably connected to the back support 6, and the two side support members 4 on the side support module extend forward beyond the back frame. The second setting method relies on the back frame as the installation carrier, wherein the mesh chair back includes a back frame with a hollow center and mesh fabric 72 stretched on it, and the shell structure 1 is detachably connected to the rear side of the back frame, and the two side support members 4 on the side support module extend forward beyond the back frame.

[0059] Furthermore, when the side support module is installed, the entire housing structure 1 is connected to the back frame or back support 6 by screws, snap-fit ​​connections, or other detachable connections. This embodiment will use screw connections for explanation. In this embodiment, through mounting holes 24 are provided on both sides or in the middle of the housing structure 1 to facilitate the installation of the side support module on the mesh chair back. Taking the side support module installed on the back support 6 as an example, the back support 6 in this embodiment is a rod-shaped structure, so the screw holes can be located in the middle of the back support 6, and the mounting holes 24 can be located in the housing structure 1. The middle part corresponds to the screw hole position. During installation, align the middle mounting hole 24 with the screw hole on the back bracket 6, and then screw into the screw hole to complete the installation. Taking the side support module set on the back frame as an example, since the middle part of the back frame is hollowed out and has a mesh 72, screw holes need to be set on the frame on the left and right sides of the back frame. Set the mounting hole 24 on the left and right sides of the shell structure 1 and align it with the screw hole position. During installation, make the shell structure 1 fit tightly against the frame part at the left and right ends of the back frame, and insert the screw into the screw hole to lock the side support module on the back frame.

[0060] Furthermore, in this embodiment, the side support module is typically positioned on the mesh backrest in two ways. The first is to position the side support module corresponding to any sub-back frame. Specifically, the multi-back frame structure includes multiple longitudinally arranged sub-back frames 71. Typically, there are upper and lower sub-back frames 71; the upper frame corresponds to the back support area, and the lower frame corresponds to the waist support area. Each sub-back frame 71 has a hollowed-out center with a mesh fabric 72 stretched across it. Any one of the multiple sub-back frames 71 is designated as a first side support back frame 71a, and the position of the side support module corresponds to the position of the first side support back frame 71a. Figure 5-6As shown, the first side support back frame 71a can be an upper back frame. By placing the side support module in a position corresponding to the upper back frame, it can provide support for the user's ribs on both sides, thus supporting the ribs and correcting posture. Figure 7 As shown, the first side support back frame 71a can also be a lower back frame. The side support module is set at the position corresponding to the lower back frame, which can provide support for the user's waist on both sides and also play a role in correcting sitting posture. After the side support module is set, in order to allow the insertion part 41 to pass through the mesh fabric 72 and to avoid interference between the insertion part 41 and the mesh fabric 72 when it moves left and right, the mesh fabric 72 of the first side support back frame 71a is provided with a strip-shaped avoidance groove 73 for avoiding the insertion part 41. The strip-shaped avoidance groove 73 can be a through groove pre-cut in a whole piece of mesh fabric 72 stretched in the middle of the first side support back frame 71a, or it can be formed by leaving a distance between two sub-mesh fabrics stretched on the first side support back frame 71a.

[0061] Furthermore, such as Figure 4 As shown, the second method involves placing the side support module at the junction between two sub-back frames. Specifically, among the multiple sub-back frames 71, at least two adjacent sub-back frames 71 are divided into second side support back frames 71b. The position of the side support module corresponds to the position between the two second side support back frames 71b, and there is a clearance gap 74 between the two adjacent second side support back frames 71b to avoid the insertion part 41. The clearance gap 74 allows the insertion part 41 to move left and right, so that the two side support members 4 provide stable support for the user's upper body on both sides.

[0062] Furthermore, a seat is provided, including any of the aforementioned mesh backrests; the aforementioned mesh backrests can be installed on an office chair with a mesh seat, or on an office chair with a padded seat.

[0063] Example 2: As Figure 8-9 As shown, this embodiment provides another type of mesh backrest with a different design. The back frame is no longer a multi-frame design, but a single frame. Specifically, the back frame is a single-frame structure 81. The center of the single-frame structure 81 is hollowed out and covered with mesh fabric 72. The mesh fabric 72 has a strip-shaped clearance groove 73 for avoiding the insertion parts 41. The strip-shaped clearance groove 73 can be a pre-cut through-slot on a single piece of mesh fabric 72 stretched in the center of the single-frame structure 81, or it can be formed by leaving a distance between two pieces of sub-mesh fabric stretched on the single-frame structure 81. When the two insertion parts 41 move left and right, the strip-shaped clearance groove 73 can avoid the two insertion parts 41, allowing the two side supports 4 to be adjusted into position, achieving the same adjustment effect as the multi-frame structure in the above embodiment.

[0064] Example 3: As Figure 10As shown, the difference between this embodiment and the above embodiment is that the two insertion parts 41 are no longer connected by a gear and rack mechanism, but by a lead screw and nut mechanism 9 located within the housing structure 1. Specifically, the lead screw and nut mechanism 9 is another type of linkage mechanism, including two lead screws 91 and 92 with opposite thread directions. The two insertion parts 41 each have a first nut 45 and a second nut 46. The first nut 45 is screwed onto the first lead screw 91, and the second nut 46 is screwed onto the second lead screw 92. A drive assembly is provided between the first lead screw 91 and the second lead screw 92. A dual-output motor 93 is fixed on a motor base 94 located within the housing structure 1. The dual-output motor 93 has two output shafts 931 rotating in the same direction. The two output shafts 931 are respectively connected to a first lead screw 91 and a second lead screw 92. The connection method includes, but is not limited to, key connection, screw connection, or coupling connection. The drive assembly can simultaneously drive the first lead screw 91 and the second lead screw 92 to rotate in the same direction. The first lead screw nut 45 and the second lead screw nut 46 will translate along the axial direction of the first lead screw 91 and the second lead screw 92 to drive the two side support members 4 to move closer or further apart.

[0065] Example 4: Figure 11 As shown, the difference between this embodiment and the above embodiments is that the shell structure 1 in this embodiment is no longer a separate first shell 3 and second shell 2, but an integral structure. Specifically, any side of the entire shell structure 1 is open, forming the opening described above. When the two insert parts 41 move left and right, the opening avoids the two insert parts 41. To ensure that the insert parts 41 do not come out of the opening after being inserted into the shell structure 1, the head of the insert part 41 is connected to a mounting part located inside the shell structure 1. The thickness of the mounting part is greater than the thickness of the insert part 41. The protrusion 47 extends beyond the insertion part 41 and is integrally formed with the mounting part. The two protrusions 47 extend beyond the upper and lower sides of the head end of the insertion part 41, respectively, so that the mounting part and the insertion part 41 form a T-shaped structure. The mounting part housing structure 1 is provided with a stop part 11 extending laterally. A gap is left between the two stop parts 11 to avoid the insertion part 41. The stop part 11 abuts against the protrusion 47, thereby restricting the insertion part 41 from coming out of the housing structure 1 through the opening when it moves left and right, so as to ensure that the two side support members 4 can move and be adjusted in the left and right direction.

[0066] 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 side support module, characterized by The utility model provides a kind of side support assembly and hollow shell structure (1), side support assembly includes two left and right symmetrical side support (4), and side support (4) is equipped with plug-in part (41);Shell structure (1) has the opening outwardly open, and two plug-in parts (41) are inserted in the opening; Two plug-in parts (41) are left and right movable with shell structure (1) as carrier and stop in corresponding position, when two plug-in parts (41) move or stop, two side supports (4) follow corresponding plug-in part (41) synchronous movement or stay in corresponding position.

2. A side support module according to claim 1, characterized in that: Shell structure (1) includes first shell (3) and second shell (2), and the front side of second shell (2) has the opening, and the front side of first shell (3) is equipped with strip slot (31) corresponding with the position of plug-in part (41) and for avoiding plug-in part (41) left and right movement, and first shell (3) is closed in the front side of second shell (2) to close the opening, and plug-in part (41) is inserted in strip slot (31).

3. A side support module according to claim 2, characterized in that: Plug-in part (41) is equipped with connecting piece (52) in shell structure (1), and the thickness of connecting piece (52) is greater than the thickness of plug-in part (41), and first shell (3) is closed in the front side of second shell (2) and is resisted to connecting piece (52) rearward, to limit plug-in part (41) to strip slot (31) and get out of shell structure (1).

4. A side support module according to claim 1, characterized in that: Any side of entire shell structure (1) is open and forms the opening, when two plug-in parts (41) are left and right movable, the opening avoids two plug-in parts (41).

5. A side support module according to claim 1, characterized in that: The head of plug-in part (41) is connected with the mounting portion in shell structure (1), the thickness of mounting portion is greater than the thickness of plug-in part (41), and then forms the protruding portion (47) beyond plug-in part (41), and the blocking portion (11) extending along the transverse direction is provided in shell structure (1), and the blocking portion (11) is resisted to protruding portion (47), to limit plug-in part (41) to get out of shell structure (1) along the opening when left and right movable.

6. A side support module according to claim 1, characterized in that: Plug-in part (41) is equipped with rack (42) in shell structure (1), two racks (42) are left and right staggered, and the tooth portion of two racks (42) is engaged with linkage gear (43) simultaneously;External force acts one of side support (4) to make linkage gear (43) rotate, to drive two side supports (4) to approach or away from each other.

7. A side support module according to claim 6, characterized in that: Both ends of linkage gear (43) have rotating shaft (44), and rotating shaft hole is provided on the inner wall of shell structure (1) towards rotating shaft (44), and rotating shaft (44) is rotatably connected in rotating shaft hole.

8. A side support module according to claim 1, characterized in that: At least one of left side support (4) and right side support (4) is equipped with control mechanism (5) between shell structure (1), and control mechanism (5) is configured to lock and unlock the position of corresponding side support (4) left and right movement.

9. A side support module according to claim 8, characterized in that: The control mechanism (5) comprises a control pull rod (51) capable of moving synchronously with the side support (4), and a plurality of gear holes (23) are arranged on the shell structure (1) in a left-right direction, when the control pull rod (51) is out of the corresponding gear hole (23), the corresponding side support (4) can move left and right and adjust the distance between the two support surfaces; when the control pull rod (51) is inserted into the corresponding gear hole (23), the corresponding side support (4) can stay at the corresponding position after adjustment.

10. A side support module according to claim 9, characterized in that it is characterized in that: The connecting piece (52) is mounted on the plug-in part, and the connecting piece (52) is provided with a front-to-back through slot, and the control pull rod (51) is inserted in the slot.

11. A side support module according to claim 1, characterized in that: A lead screw and nut mechanism (9) is arranged between the two plug-in parts (41) in the shell structure (1), the lead screw and nut mechanism (9) comprises a first lead screw (91) and a second lead screw (92) with opposite screw directions, the two plug-in parts (41) are respectively provided with a first nut (45) and a second nut (46), the first nut (45) is screw-connected on the first lead screw (91), the second nut (46) is screw-connected on the second lead screw (92), and a driving assembly is arranged between the first lead screw (91) and the second lead screw (92), the driving assembly can drive the first lead screw (91) and the second lead screw (92) to rotate in the same direction at the same time, so as to drive the two side supports (4) to move close to or away from each other.

12. A side support module according to claim 11, characterized in that: The driving assembly is a double-output motor (93), the double-output motor (93) has two output shafts (931) with the same rotating direction, and the two output shafts (931) are connected with the first lead screw (91) and the second lead screw (92) respectively.

13. A webbed chair back, characterized by: The side support module of claim 1 is included.

14. The mesh chair back according to claim 13, wherein: The mesh cloth chair back comprises a back support (6), a back frame with a hollow middle part and a mesh cloth (72) stretched thereon, the back frame is arranged on the front side of the back support (6), the shell structure (1) is detachably connected to the back support (6), and the two side supports (4) on the side support module protrude forward beyond the back frame.

15. The mesh chair back according to claim 13, wherein: The mesh cloth chair back comprises a back frame with a hollow middle part and a mesh cloth (72) stretched thereon, the shell structure (1) is detachably connected to the back frame, and the two side supports (4) on the side support module protrude forward beyond the back frame.

16. A webbed chair back according to claim 14 or 15, wherein: The back frame is a multi-back frame structure, the multi-back frame structure comprises a plurality of sub-back frames (71) arranged in a longitudinal direction, the middle part of each sub-back frame (71) is hollow and provided with a mesh cloth (72), any one of the plurality of sub-back frames (71) is divided into a first side support back frame (71a), the position of the side support module corresponds to the position of the first side support back frame (71a), and the mesh cloth (72) of the first side support back frame (71a) is provided with a strip-shaped avoiding slot (73) for avoiding the plug-in part (41).

17. A webbed chair back according to claim 14 or 15, wherein: The back frame is a multi-back frame structure, the multi-back frame structure comprises a plurality of longitudinally arranged sub-back frames (71), the middle part of the sub-back frame (71) is hollowed out and provided with a mesh cloth (72), among the plurality of sub-back frames (71), at least two adjacent sub-back frames (71) are both divided into second side support back frames (71b), the position of the side support module corresponds to the position between the two second side support back frames (71b), and the two adjacent second side support back frames (71b) have a avoiding gap (74) for avoiding the plug-in part (41).

18. A webbed chair back according to claim 14 or 15, wherein: The back frame is a single back frame structure (81), the middle part of the single back frame structure (81) is hollowed out and provided with a mesh cloth (72), and the mesh cloth (72) is provided with a strip-shaped avoiding groove (73) for avoiding the plug-in part (41).

19. A seat, characterized by: The mesh cloth chair back comprises the mesh cloth chair back according to any one of claims 13-15.

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