Supporting structure for water facility

Abstract

The utility model discloses a supporting structure for an overwater facility, belongs to the field of overwater facility accessories, and aims to provide a lower and back support at a higher position for a user so as to reduce the fatigue feeling of the lower and back of the user. The supporting structure comprises a detachable back supporting structure matched with the water facility, the detachable back supporting structure comprises a back mesh pad and two supporting units, and the two supporting units are arranged on the two sides of the back mesh pad respectively; the supporting unit comprises a first fixing belt, a first connecting assembly, a third connecting rod, a third upper end jack piece, a third lower end jack piece, a second fixing belt and a second connecting assembly. One end of the first fixing belt is connected with the back mesh pad, and the other end of the first fixing belt is connected with a matched water facility through a first connecting assembly. The supporting mechanism can provide waist and back support for a user, the waist and back fatigue feeling of the user is effectively reduced, and therefore the interestingness of water sports is improved.

Description

Technical Field

[0001] This application relates to the field of accessories for water-based facilities, specifically a support structure for such facilities. More specifically, the water-based facility described in this application can be a rigid boat, an inflatable boat, or a similar water-based facility. In a specific example, it relates to the field of hull accessories, particularly inflatable boat accessories, specifically an inflatable boat support structure. Background Technology

[0002] With the increasing availability of outdoor water sports, outdoor water sports are breaking through niche sports circles and becoming a new favorite among the general public. An inflatable boat is an inflatable boat that can be packed small enough to fit in a backpack. Compared with ordinary inflatable kayaks, inflatable boats are lighter, easier to use, have a longer material lifespan, higher reliability, and smaller storage volume. Specifically, inflatable boats have the following advantages: (1) Lightweight: weighing between 2 and 6 kilograms; (2) Heavy load: the load weight is usually between 150 and 300 kilograms; (3) Easy to store: they are often easy to pack into the size of a sleeping bag and can be easily put into a backpack; (4) High versatility: they can be taken on hiking, camping, self-driving, cycling, and motorcycle touring, allowing users to explore more possibilities.

[0003] Inflatable boats are easy to carry and hike, and can be quickly folded, inflated, and deflated for rapid assembly and use when needed. To use an inflatable boat, the user inflates it, places it on the water, and then positions themselves on the bottom of the boat to begin paddling.

[0004] The applicant discovered in practice that users experience significant lower back fatigue after using inflatable boats for a certain period. How to reduce this fatigue while maintaining the characteristics of existing inflatable boats has become a pressing technical problem for the applicant.

[0005] Furthermore, there is also a need for back support for users of water sports facilities such as kayaks and canoes. Summary of the Invention

[0006] After analysis, the inventors believe that the main reasons for users' fatigue are as follows:

[0007] (1) Some inflatable boats use inflatable backrests. After leaning against them for a long time, the pressure is always too concentrated around the spine, resulting in a decrease in comfort.

[0008] (2) Some inflatable boats use EVA foam backrests, but due to the limitations of traditional structures, the center point of the backrest cannot be higher than the highest point of the boat's side. As a result, the backrest is still too low for users, making it difficult to provide effective support for the lower back and reducing comfort.

[0009] (3) Some kayaks are equipped with a metal frame support structure that can provide higher back support, but this metal frame is difficult to fold into a bag, is heavy, and is inconvenient to carry.

[0010] The purpose of this invention is to provide a support structure for water sports facilities that provides elevated lumbar and back support for users. This support structure features a detachable design, facilitating storage and folding without affecting the existing structure of the water sports facility. The support structure effectively reduces lumbar and back fatigue, thereby enhancing the enjoyment of water sports. This invention is adaptable to various water sports facilities, including but not limited to rigid boats, inflatable boats, or similar facilities, demonstrating strong adaptability. Furthermore, when the water sports facility is an inflatable boat, it can provide lumbar and back support for the user.

[0011] To achieve the above objectives, this application adopts the following technical solution:

[0012] A support structure for a water-based facility includes a detachable back support structure that mates with the water-based facility. The water-based facility is either a rigid boat or an inflatable boat. Preferably, a support structure for a backpack boat is provided, including a detachable back support structure that mates with the backpack boat.

[0013] The detachable back support structure includes a back mesh pad and support units, wherein there are two support units and the two support units are respectively arranged on both sides of the back mesh pad;

[0014] The side of the back mesh pad closest to the user's back is designated as the front support side, and the side of the back mesh pad furthest from the user's back is designated as the rear support side.

[0015] The support unit includes a first fixing strap, a first connecting component, a third connecting rod, a third upper end insertion piece, a third lower end insertion piece, a second fixing strap, and a second connecting component;

[0016] One end of the first fixing strap is connected to the back net mat, and the other end of the first fixing strap is connected to a matching water facility via a first connecting component.

[0017] The third upper insertion part is connected to the back net mat, the third lower insertion part is connected to the matching water equipment, and the two ends of the third connecting rod can be inserted into the third upper insertion part and the third lower insertion part respectively.

[0018] One end of the second fixing strap is connected to the back mesh pad or the third upper insertion piece, and the other end of the second fixing strap is connected to the third lower insertion piece through the second connecting assembly. The second fixing strap and the third connecting rod are arranged in the same direction, and the cooperation between the second fixing strap and the second connecting assembly can fix the third connecting rod in the third upper insertion piece and the third lower insertion piece to prevent the third connecting rod from coming out of the third upper insertion piece and the third lower insertion piece.

[0019] The first fixing strap and the third connecting rod are arranged in a V-shape.

[0020] The connection point between the first connecting component and the water facility is referred to as the first connection point. The first connection point is located on the front side of the support, and the third upper insertion hole is located on the rear side of the support.

[0021] The connection point between the second connecting component and the inflatable boat is designated as the second connection point, which is located on the rear side of the support.

[0022] The back mesh pad is curved.

[0023] The first connecting component includes a first male buckle seat and a first female buckle seat that mates with the first male buckle seat;

[0024] The first male buckle is connected to the first fixing strap, and the first female buckle is disposed on the ship's side of the water facility; or the first female buckle is connected to the first fixing strap, and the first male buckle is disposed on the ship's side of the water facility.

[0025] The first connecting component also includes a first D-ring buckle disposed on the first fixing strap.

[0026] The first connecting assembly further includes a first fixed connecting piece for mounting on the side of the floating facility;

[0027] The first female buckle is connected to the first fixed connecting piece, or the first male buckle is connected to the first fixed connecting piece.

[0028] The second connecting component includes a second male buckle and a second female buckle that mates with the second male buckle;

[0029] One end of the second fixing strap is connected to the back mesh pad or the third upper insertion hole, and the other end of the second fixing strap is connected to the second buckle male seat; the second buckle female seat is connected to the third lower insertion hole, and the cooperation between the second fixing strap, the second buckle male seat, and the second buckle female seat can fix the third connecting rod in the third upper insertion hole and the third lower insertion hole to prevent the third connecting rod from coming out of the third upper insertion hole and the third lower insertion hole;

[0030] Alternatively, one end of the second fixing strap can be connected to the back mesh pad or the third upper insertion hole, and the other end of the second fixing strap can be connected to the second buckle female seat; the second buckle male seat is connected to the third lower insertion hole, and the cooperation between the second fixing strap, the second buckle male seat, and the second buckle female seat can fix the third connecting rod in the third upper insertion hole and the third lower insertion hole to prevent the third connecting rod from coming out of the third upper insertion hole and the third lower insertion hole.

[0031] The second connecting component also includes a second D-ring buckle disposed on the second fixing strap.

[0032] The second connecting assembly also includes a second fixed connecting piece for mounting on the side of the floating facility;

[0033] The second female buckle is connected to the second fixed connecting piece, or the second male buckle is connected to the second fixed connecting piece.

[0034] The support unit also includes a fourth connecting component;

[0035] The fourth connecting component includes a fourth strap, a fourth D-ring buckle disposed on the fourth strap, and a fourth fixed connecting piece for being disposed on the side of the floating facility. One end of the fourth strap is connected to the fourth fixed connecting piece, and the other end of the fourth strap is bent and forms a fourth loop through the fourth D-ring buckle. The third connecting rod passes through the fourth loop, and the fourth loop can provide tension force to the third connecting rod in the direction of the floating facility's side.

[0036] The fourth ring is fitted onto the third connecting rod.

[0037] When the included angle between the two third links is ≤10°, the detachable back support structure includes a fifth back connection assembly, or the detachable back support structure does not include a fifth back connection assembly.

[0038] When the included angle between the two third links is ≥20°, the detachable back support structure also includes a fifth back connection assembly.

[0039] The detachable back support structure also includes a fifth back connection component;

[0040] The fifth back connection assembly includes a fifth link and a fifth T-shaped connector. There are two fifth T-shaped connectors, and the two fifth T-shaped connectors are respectively located at both ends of the fifth link.

[0041] The fifth T-shaped snap-fit ​​component includes a fifth cylindrical snap-fit ​​part that cooperates with the third connecting rod and a fifth insertion part that cooperates with the fifth connecting rod. The fifth cylindrical snap-fit ​​part has a C-shaped cross-section perpendicular to its axial direction, and the fifth insertion part is provided with a fifth insertion hole that cooperates with the fifth connecting rod.

[0042] The two ends of the fifth connecting rod are respectively inserted into the fifth insertion hole of the fifth T-shaped snap-fit ​​component, and the fifth T-shaped snap-fit ​​component is snapped onto the third connecting rod through the fifth cylindrical snap-fit ​​part.

[0043] The fifth link is arc-shaped. Preferably, the fifth link is circular arc-shaped.

[0044] The fifth insertion part is tubular, and the fifth insertion part is perpendicular to the fifth cylindrical snap-fit ​​part.

[0045] The back mesh includes a sixth support pad and a sixth flexible support piece. The sixth flexible support piece is disposed inside the sixth support pad and can provide support for the sixth support pad.

[0046] The sixth support pad is made of mesh fabric.

[0047] The sixth flexible support sheet is sheet-shaped and is made of plastic.

[0048] The sixth flexible support sheet is provided with several process holes.

[0049] In this application, the third link is connected to the back mesh pad, thereby raising the height of the back mesh pad. The third link serves as the main support mechanism, with a lower third insertion hole limiting the lower end of the third link and an upper third insertion hole limiting the upper end of the third link. Simultaneously, one end of the second fixing strap is connected to the back mesh pad or the upper third insertion hole, and the other end of the second fixing strap is connected to the lower third insertion hole via a second connecting assembly. The second fixing strap and the third link are arranged in the same direction. With this structure, through the cooperation of the second fixing strap and the second connecting assembly, when the second fixing strap is tightened, the third link can be fixed within the upper and lower third insertion holes, preventing it from detaching from them.

[0050] In this structure, the second fixing strap and the second connecting assembly prevent the third link from dislodging from the third upper and third lower insertion parts; the first fixing strap and the third link are arranged in a V-shape; the first fixing strap and the first connecting assembly constitute the first support intermediate body, and the second fixing strap, the second connecting assembly, the third link, the third upper insertion part, and the third lower insertion part constitute the third support intermediate body; when the user sits down, the user acts backward on the back net, and the third support intermediate body provides forward support force (i.e., support force to the front side of the support), the first intermediate support body provides forward tension, and the fourth connecting assembly can provide tension force (i.e., lateral tension force) to the third link in the direction of the ship's side of the water facility.

[0051] Furthermore, the support unit also includes a fourth connecting assembly. The fourth connecting assembly is used to provide tension force to the third link in the direction of the ship's side of the floating facility.

[0052] Furthermore, when this support structure is used as the front or middle backrest of a water-based facility, the angle between the two third links is within 10° (i.e., when the two third links are approximately parallel), thus requiring the use of a fifth backrest connection assembly for auxiliary support. The fifth backrest connection assembly incorporates a fifth T-shaped snap-fit ​​connector, which is positioned at both ends of the fifth link for quick installation and release.

[0053] When this inflatable boat support structure is used as the backrest of an inflatable boat, because the installation position is close to the hull where it closes, the angle between the two third links is greater than or equal to 20°. The pressure between the user's back and the backrest mesh provides stability to the backrest mesh itself, thus eliminating the need for an additional fifth backrest connection assembly.

[0054] This application employs the lightest method known to date to achieve the most comprehensive lumbar and back support, which is impossible to achieve with existing technologies. Attached Figure Description

[0055] Figure 1 This is a partial structural diagram of the combination of the inflatable boat support structure and the inflatable boat in Example 1.

[0056] Figure 2 This is a partial structural diagram of the inflatable boat support structure in Example 1.

[0057] Figure 3 This is a schematic diagram of the inflatable boat support structure in Example 1. Figure 1 .

[0058] Figure 4 This is a schematic diagram of the inflatable boat support structure in Example 1. Figure 2 .

[0059] Figure 5 This is a partial structural diagram of the inflatable boat support structure combined with the inflatable boat in Example 2.

[0060] Figure 6 This is a partial structural diagram of the inflatable boat support structure in Example 2.

[0061] Figure 7 This is a schematic diagram of the inflatable boat support structure in Example 2. Figure 1 .

[0062] Figure 8 This is a schematic diagram of the inflatable boat support structure in Example 2. Figure 2 .

[0063] The markings in the diagram are: 1. Inflatable boat, 2. Back net mat, 11. First fixing strap, 12. First connecting component, 15. First D-ring buckle, 21. Second fixing strap, 22. Second connecting component, 23. Second D-ring buckle, 24. Second buckle male seat, 31. Third connecting rod, 32. Third upper insertion hole, 33. Third lower insertion hole, 41. Fourth strap, 42. Fourth D-ring buckle, 51. Fifth connecting rod, 52. Fifth T-shaped clip. Detailed Implementation

[0064] The present invention will now be described in detail with reference to the accompanying drawings.

[0065] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0066] Example 1

[0067] This embodiment provides a support structure for a water-based facility, which serves as its backrest. In a specific example, the water-based facility is an inflatable boat; here, this embodiment uses an inflatable boat as an example for explanation.

[0068] The inflatable boat support structure of this embodiment includes a back net and support units; wherein, there are two support units, which are respectively arranged on both sides of the back net. For easy distinction, the side of the back net closer to the user's back is referred to as the front support side, and the side of the back net farther from the user's back is referred to as the rear support side.

[0069] Furthermore, the back mesh includes a sixth support pad sleeve and a sixth flexible support sheet, with the sixth flexible support sheet disposed within the sixth support pad sleeve. In a specific example, the sixth support pad sleeve is made of a mesh fabric; the sixth flexible support sheet is sheet-like and made of plastic; preferably, the sixth flexible support sheet has several process holes. With this structure, the sixth support pad sleeve has good air permeability, while the sixth flexible support sheet provides support for the sixth support pad sleeve. Preferably, the back mesh is arc-shaped.

[0070] In this embodiment, the support unit includes a first fixing strap, a first connecting assembly, a third connecting rod, a third upper insertion hole, a third lower insertion hole, a second fixing strap, a second connecting assembly, and a fourth connecting assembly. The upper end of the first fixing strap is connected to the back mesh pad, and the lower end of the first fixing strap is connected to a mating inflatable boat via the first connecting assembly. The third upper insertion hole is connected to the back mesh pad, and the third lower insertion hole is connected to a mating inflatable boat. Both ends of the third connecting rod can be inserted into the third upper and third lower insertion holes, respectively. One end of the second fixing strap is connected to the back mesh pad, and the other end of the second fixing strap is connected to the third lower insertion hole via the second connecting assembly. The second fixing strap and the third connecting rod are arranged in the same direction. With this structure, the cooperation of the second fixing strap and the second connecting assembly can fix the third connecting rod within the third upper and third lower insertion holes, preventing the third connecting rod from detaching from them. In this embodiment, the first fixing belt and the third connecting rod are arranged in a V-shape.

[0071] The connection point between the first connecting component and the inflatable boat is designated as the first connection point, located on the front side of the support, while the third upper insertion hole is located on the rear side of the support. Further, the connection point between the second connecting component and the inflatable boat is designated as the second connection point, also located on the rear side of the support. With this structure, the third link provides corresponding support force; the second fixing strap, in conjunction with the second connecting component, tightens the third link, preventing it from dislodging from the third upper and lower insertion holes; and the first fixing strap and the first connecting component provide forward tension. In this embodiment, this structure is primarily used as the backrest of the inflatable boat, and the boat's hull also provides some support. Specifically, this inflatable boat support structure serves as the backrest of the inflatable boat because its installation position is close to the hull's folding point, and the angle between the two third links is greater than or equal to 20°. The pressure between the user's back and the back mesh provides stability to the back mesh itself, thus eliminating the need for an additional fifth back connecting component.

[0072] Furthermore, the first connecting assembly includes a first male buckle and a first female buckle that mates with the first male buckle; wherein the first male buckle is connected to the first fixing strap, and the first female buckle is disposed on the hull of the inflatable boat; or the first female buckle is connected to the first fixing strap, and the first male buckle is disposed on the hull of the inflatable boat. Further, the first connecting assembly also includes a first D-ring buckle disposed on the first fixing strap. Preferably, the first connecting assembly also includes a first fixing connecting piece for being disposed on the hull of the inflatable boat, and the first female buckle or the first male buckle is connected to the first fixing connecting piece.

[0073] The second connecting component includes a second male buckle seat and a second female buckle seat that mates with the second male buckle seat.

[0074] In this configuration, one end of the second fixing strap is connected to the back mesh pad, and the other end is connected to the second male buckle seat. The second female buckle seat is connected to the third lower insertion hole. Through the cooperation between the second fixing strap, the second male buckle seat, and the second female buckle seat, the third connecting rod can be fixed within the third upper and third lower insertion holes to prevent it from detaching. Alternatively, one end of the second fixing strap is connected to the back mesh pad, and the other end is connected to the second female buckle seat. The second male buckle seat is connected to the third lower insertion hole. Through the cooperation between the second fixing strap, the second male buckle seat, and the second female buckle seat, the third connecting rod can be fixed within the third upper and third lower insertion holes to prevent it from detaching.

[0075] Furthermore, the second connecting assembly also includes a second D-ring buckle disposed on the second fixing strap. Preferably, the second connecting assembly also includes a second fixing connecting piece for being disposed on the hull of the inflatable boat, and the second buckle female or second buckle male is connected to the second fixing connecting piece.

[0076] In this embodiment, the fourth connecting component includes a fourth strap, a fourth D-ring buckle disposed on the fourth strap, and a fourth fixing connecting piece for mounting on the hull of the inflatable boat. One end of the fourth strap is connected to the fourth fixing connecting piece, and the other end of the fourth strap is bent and forms a fourth loop through the fourth D-ring buckle. The third connecting rod passes through the fourth loop (i.e., the fourth loop is fitted onto the third connecting rod), and the fourth loop provides tension to the third connecting rod in the direction of the inflatable boat's hull. With this structure, the fourth connecting component can tension the third connecting rod.

[0077] Example 2

[0078] This embodiment provides a support structure for a water-based facility, which serves as its center backrest or front backrest. In a specific example, the water-based facility is an inflatable boat; here, this embodiment uses an inflatable boat as an example for explanation. The inflatable boat support structure of this embodiment includes a backrest net, a support unit, and a fifth backrest connecting assembly, and is otherwise the same as in Embodiment 1.

[0079] The fifth back-end connecting assembly includes a fifth connecting rod and two fifth T-shaped snap-fit ​​components. The fifth T-shaped snap-fit ​​components are respectively located at both ends of the fifth connecting rod. The fifth connecting rod is arc-shaped; further, it is circularly arc-shaped. Each fifth T-shaped snap-fit ​​component includes a fifth cylindrical snap-fit ​​portion that mates with the third connecting rod and a fifth insertion portion that mates with the fifth connecting rod. The fifth cylindrical snap-fit ​​portion has a C-shaped cross-section perpendicular to its axial direction, and the fifth insertion portion has a fifth insertion hole that mates with the fifth connecting rod. In this structure, both ends of the fifth connecting rod are respectively inserted into the fifth insertion holes of the fifth T-shaped snap-fit ​​component, and the fifth T-shaped snap-fit ​​component is snapped onto the third connecting rod through the fifth cylindrical snap-fit ​​portion. Preferably, the fifth insertion portion is tubular, and the fifth insertion portion is perpendicular to the fifth cylindrical snap-fit ​​portion.

[0080] In this embodiment, a fifth backrest connection component is added, which provides lateral support based on the third link in the support unit. It is particularly suitable for use as the middle backrest or front backrest of an inflatable boat (at this time, when the included angle between the two third links is ≤10°, the fifth backrest connection component can enhance the stability of the third link), and can also be used as the rear backrest of an inflatable boat.

[0081] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A support structure for aquatic facilities, characterized in that, Including a detachable back support structure for use with water-based facilities; The detachable back support structure includes a back mesh pad and support units, wherein there are two support units and the two support units are respectively arranged on both sides of the back mesh pad; The side of the back mesh pad closest to the user's back is designated as the front support side, and the side of the back mesh pad furthest from the user's back is designated as the rear support side. The support unit includes a first fixing strap, a first connecting component, a third connecting rod, a third upper end insertion piece, a third lower end insertion piece, a second fixing strap, and a second connecting component; One end of the first fixing strap is connected to the back net mat, and the other end of the first fixing strap is connected to a matching water facility via a first connecting component. The third upper insertion part is connected to the back net mat, the third lower insertion part is connected to the matching water equipment, and the two ends of the third connecting rod can be inserted into the third upper insertion part and the third lower insertion part respectively. One end of the second fixing strap is connected to the back mesh pad or the third upper insertion piece, and the other end of the second fixing strap is connected to the third lower insertion piece through the second connecting assembly. The second fixing strap and the third connecting rod are arranged in the same direction, and the cooperation between the second fixing strap and the second connecting assembly can fix the third connecting rod in the third upper insertion piece and the third lower insertion piece to prevent the third connecting rod from coming out of the third upper insertion piece and the third lower insertion piece. The first fixing strap and the third connecting rod are arranged in a V-shape.

2. The support structure according to claim 1, characterized in that, The first connecting component includes a first male buckle seat and a first female buckle seat that mates with the first male buckle seat; The first male buckle is connected to the first fixing strap, and the first female buckle is disposed on the ship's side of the water facility; or the first female buckle is connected to the first fixing strap, and the first male buckle is disposed on the ship's side of the water facility.

3. The support structure according to claim 1, characterized in that, The first connecting component also includes a first D-ring buckle disposed on the first fixing strap.

4. The support structure according to claim 1, characterized in that, The second connecting component includes a second male buckle and a second female buckle that mates with the second male buckle; One end of the second fixing strap is connected to the back mesh pad or the third upper insertion hole, and the other end of the second fixing strap is connected to the second buckle male seat; the second buckle female seat is connected to the third lower insertion hole, and the cooperation between the second fixing strap, the second buckle male seat, and the second buckle female seat can fix the third connecting rod in the third upper insertion hole and the third lower insertion hole to prevent the third connecting rod from coming out of the third upper insertion hole and the third lower insertion hole; Alternatively, one end of the second fixing strap can be connected to the back mesh pad or the third upper insertion hole, and the other end of the second fixing strap can be connected to the second buckle female seat; the second buckle male seat is connected to the third lower insertion hole, and the cooperation between the second fixing strap, the second buckle male seat, and the second buckle female seat can fix the third connecting rod in the third upper insertion hole and the third lower insertion hole to prevent the third connecting rod from coming out of the third upper insertion hole and the third lower insertion hole.

5. The support structure according to claim 1, characterized in that, The second connecting component also includes a second D-ring buckle disposed on the second fixing strap.

6. The support structure according to claim 1, characterized in that, The support unit also includes a fourth connecting component; The fourth connecting component includes a fourth strap, a fourth D-ring buckle disposed on the fourth strap, and a fourth fixed connecting piece for being disposed on the side of the floating facility. One end of the fourth strap is connected to the fourth fixed connecting piece, and the other end of the fourth strap is bent and forms a fourth loop through the fourth D-ring buckle. The third connecting rod passes through the fourth loop, and the fourth loop can provide tension force to the third connecting rod in the direction of the floating facility's side.

7. The support structure according to any one of claims 1 to 6, characterized in that, The detachable back support structure also includes a fifth back connection component; The fifth back connection assembly includes a fifth link and a fifth T-shaped connector. There are two fifth T-shaped connectors, and the two fifth T-shaped connectors are respectively located at both ends of the fifth link. The fifth T-shaped snap-fit ​​component includes a fifth cylindrical snap-fit ​​part that cooperates with the third connecting rod and a fifth insertion part that cooperates with the fifth connecting rod. The fifth cylindrical snap-fit ​​part has a C-shaped cross-section perpendicular to its axial direction, and the fifth insertion part is provided with a fifth insertion hole that cooperates with the fifth connecting rod. The two ends of the fifth connecting rod are respectively inserted into the fifth insertion hole of the fifth T-shaped snap-fit ​​component, and the fifth T-shaped snap-fit ​​component is snapped onto the third connecting rod through the fifth cylindrical snap-fit ​​part.

8. The support structure according to any one of claims 1 to 6, characterized in that, The back mesh includes a sixth support pad and a sixth flexible support piece. The sixth flexible support piece is disposed inside the sixth support pad and can provide support for the sixth support pad.

9. The support structure according to claim 8, characterized in that, The sixth flexible support sheet is provided with several process holes.

10. The support structure according to claim 7, characterized in that, The back mesh includes a sixth support pad and a sixth flexible support piece. The sixth flexible support piece is disposed inside the sixth support pad and can provide support for the sixth support pad.

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