Backrest folding structure and folding deck chair

Abstract

The utility model relates to the technical field of folding chairs, and provides a backrest folding structure which comprises two backrest rods arranged side by side and a backrest folding component arranged on the two backrest rods and used for enabling the two backrest rods to be far away from or close to each other, the backrest folding assembly comprises a first folding mechanism and a second folding mechanism; the first folding mechanism is positioned at the upper part; the two ends of the first folding mechanism are rotationally connected with the two backrest rods respectively; the second folding mechanism is positioned at the lower part and the two ends of the second folding mechanism are rotationally connected with the two backrest rods respectively; the telescopic rod is arranged between the first folding mechanism and the second folding mechanism and is used for enabling the middle part of the first folding mechanism and the middle part of the second folding mechanism to be close to each other or far away from each other. According to the backrest folding structure, by arranging the first folding mechanism, the second folding mechanism and the telescopic rod, after the folding chair is unfolded, the first folding mechanism, the second folding mechanism and the telescopic rod are of an I-shaped structure, flexible cloth such as oxford cloth can be supported, and collapse is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of folding chair, especially to a backrest folding structure and folding deck chair. BACKGROUND

[0002] With the development of industry in recent years, people's demand for material culture is generally improved, and people have higher experience and pursuit for the chair, so the folding chair appears. The folding chair is favored by people because of its characteristics of folding and unfolding freely, which is convenient to move and saves space. When needed, it is unfolded to sit, and when not needed, it is folded, which does not waste space and has strong portability.

[0003] The common folding chair is mainly composed of metal pipes and flexible materials such as oxford cloth. The folding link part is linked by rivets and original plastic parts, and according to the characteristics of different products, the design of mesh cup net, operation panel, storage bag, foot rest and sun shield is increased.

[0004] Then these folding chairs often cause the seat or backrest to collapse to the middle when used, which is uncomfortable to use, or the experience is poor due to the relaxation of the folding mechanism. SUMMARY

[0005] The utility model discloses a backrest folding structure and folding deck chair to solve the above technical problems, and the specific scheme is as follows:

[0006] A backrest folding structure, comprising two backrest rods arranged side by side, a backrest folding assembly arranged on the two backrest rods and used for moving the two backrest rods away from or close to each other.

[0007] The backrest folding assembly comprises a first folding mechanism located above and rotationally connected to the two backrest rods at both ends, a second folding mechanism located below and rotationally connected to the two backrest rods at both ends, and an extension rod arranged between the first folding mechanism and the second folding mechanism and used for moving the middle part of the first folding mechanism and the middle part of the second folding mechanism away from or close to each other. The extension rod is provided with a limiting piece for preventing the extension rod from extending or shortening.

[0008] Further, the first folding mechanism comprises a first hinge seat, two first rotating rods arranged between the first hinge seat and the backrest rod, one end of the first rotating rod being rotationally connected to the first hinge seat, and the other end being rotationally connected to the backrest rod.

[0009] Further, the second folding mechanism comprises a second hinge seat, two second rotating rods arranged between the second hinge seat and the backrest rod, one end of the second rotating rod being rotationally connected to the second hinge seat, and the other end being rotationally connected to the backrest rod.

[0010] Furthermore, the telescopic rod includes a first connecting rod disposed on the first folding mechanism above, and a second connecting rod disposed at one end inside the first connecting rod and at the other end on the second folding mechanism, wherein the end of the second connecting rod located inside the first connecting rod is movably connected to the first connecting rod.

[0011] Furthermore, the telescopic rod also includes a limiting member for preventing the second connecting rod from moving within the first connecting rod, i.e., the limiting member is disposed within the second connecting rod.

[0012] Furthermore, the limiting member includes an elastic part located inside the second connecting rod and having elasticity and being V-shaped, and a limiting part disposed on the elastic part. The first connecting rod is provided with a first through hole for the limiting part to pass through, and the second connecting rod is provided with a second through hole for the limiting part to pass through.

[0013] Furthermore, the first folding mechanism is also provided with a pressing part for pressing the limiting part.

[0014] Furthermore, the inner side of the pressing part is designed to fit the shape of the telescopic rod in an arc shape, and a step part is provided on the inner side of the arc shape corresponding to the limiting part.

[0015] This utility model also provides a folding recliner with a backrest folding structure. The folding recliner also includes two sets of supporting folding components, a third folding mechanism for connecting the two supporting folding components and being foldable, and a support mechanism for connecting the backrest rod to the supporting folding components. The supporting folding components are arranged corresponding to the backrest rod. The third folding mechanism includes two limiting pieces located on both sides of the supporting folding components and rotatably connected to the supporting folding components at one end, a limiting seat disposed at the other end of the two limiting pieces, and a limiting sleeve disposed between the limiting seat and the backrest rod. The limiting seat is provided with a limiting groove that can abut against the supporting folding components.

[0016] Furthermore, the supporting folding assembly includes a front support leg and a rear support leg connected at the top by a rotating shaft, a seat support rod with one end rotatably connected to the backrest and the middle or near the middle position rotatably connected to the front support leg, and an armrest with one end rotatably connected to the backrest. An adjustment seat is provided below the armrest between the front support leg and the rear support leg. The adjustment seat is provided with an adjustment channel for the rotating shaft to pass through and several position slots for locking the rotating shaft. The several position slots are located above the adjustment channel and communicate with the adjustment channel.

[0017] As can be seen from the above description of this utility model, this utility model has the following beneficial effects:

[0018] The backrest folding structure of this utility model is provided with a first folding mechanism, a second folding mechanism and a telescopic rod. When the folding chair is unfolded, the first folding mechanism, the second folding mechanism and the telescopic rod form an "I" shape, which can support flexible fabrics such as Oxford cloth and prevent collapse. Attached Figure Description

[0019] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0020] in:

[0021] Figure 1 A schematic diagram of a backrest folding structure Figure 1 ;

[0022] Figure 2 A schematic diagram of a backrest folding structure Figure 2 ;

[0023] Figure 3 This is an exploded view of a backrest folding structure.

[0024] Figure 4 yes Figure 3 A magnified view of a portion of the image;

[0025] Figure 5 This is a schematic diagram of the structure of the first hinge seat;

[0026] Figure 6 A schematic diagram of the structure of a folding recliner Figure 1 ;

[0027] Figure 7 A schematic diagram of the structure of a folding recliner Figure 2 ;

[0028] Figure 8 This is a front view of a folding recliner;

[0029] Figure 9 This is a side view of a folding recliner;

[0030] Figure 10 yes Figure 7 A magnified view of a portion of the image;

[0031] Figure 11 This is a schematic diagram of a folding recliner after it has been folded.

[0032] Figures 1 to 11 The identifiers in the text are:

[0033] 001. Backrest bar; 002. Backrest folding assembly; 021. First folding mechanism; 211. First hinge seat; 2111. Pressing part; 2112. Step part; 212. First rotating rod; 022. Second folding mechanism; 221. Second hinge seat; 222. Second rotating rod; 023. Telescopic rod; 231. First connecting rod; 2311. First through hole; 232. Second connecting rod; 2321. Second through hole ; 233, limiting component; 2331, elastic part; 2332, limiting part; 031, front support leg; 032, rear support leg; 004, seat support rod; 005, armrest component; 051, adjustment seat; 511, adjustment channel; 512, gear slot; 006, third folding mechanism; 061, first folding rod; 007, support mechanism; 071, limiting piece; 072, limiting seat; 721, limiting groove; 723, limiting sleeve. Detailed Implementation

[0034] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer and more understandable, 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 only used to explain this utility model and are not intended to limit this utility model.

[0035] Please see Figures 1 to 5This embodiment provides a backrest folding structure, including two backrest rods 001 arranged side by side, and a backrest folding assembly 002 disposed on the two backrest rods 001 and used to move the two backrest rods 001 away from or towards each other; the backrest folding assembly 002 includes a first folding mechanism 021 located above and rotatably connected to the two backrest rods 001 at both ends, a second folding mechanism 022 located below and rotatably connected to the two backrest rods 001 at both ends, and a telescopic rod 023 disposed between the first folding mechanism 021 and the second folding mechanism 022 and used to move the middle of the first folding mechanism 021 and the middle of the second folding mechanism 022 towards or away from each other, and a limiting member 233 disposed on the telescopic rod 023 to prevent the telescopic rod 023 from extending or shortening. The middle part of the first folding mechanism 021 moves upward to fold the first folding mechanism 021, and the middle part of the second folding mechanism 022 moves downward to fold the second folding mechanism 022. When the first folding mechanism 021 and the second folding mechanism 022 are folded, the two back-to-back rods 001 move closer to each other, realizing the folding of the back-to-back folding structure. Conversely, the middle part of the first folding mechanism 021 moves downward to unfold the first folding mechanism 021, and the middle part of the second folding mechanism 022 moves upward to unfold the second folding mechanism 022. When the first folding mechanism 021 and the second folding mechanism 022 are unfolded, the two back-to-back rods 001 move further apart, realizing the opening of the back-to-back folding structure. After opening, the length of the telescopic rod 023 is limited by the limiting member 233, which can prevent the first folding mechanism 021 and the second folding mechanism 022 from folding on their own. When the first folding mechanism 021 or the second folding mechanism 022 is unfolded or folded, both ends rotate with the back-to-back rods 001.

[0036] The first folding mechanism 021 includes a first hinge seat 211 and two first rotating rods 212 disposed between the first hinge seat 211 and the backrest rod 001. One end of the first rotating rod 212 is rotatably connected to the first hinge seat 211, and the other end is rotatably connected to the backrest rod 001. When the first rotating rod 212 rotates upward relative to the backrest rod 001, the first hinge seat 211 moves upward relative to it, thereby folding the first folding mechanism 021. Conversely, when the first rotating rod 212 rotates downward relative to the backrest rod 001, the first hinge seat 211 moves downward relative to it, thereby opening the first folding mechanism 021.

[0037] The second folding mechanism 022 includes a second hinge seat 221 and two second rotating rods 222 disposed between the second hinge seat 221 and the backrest rod 001. One end of each rotating rod 222 is rotatably connected to the second hinge seat 221, and the other end is rotatably connected to the backrest rod 001. When the second rotating rod 222 rotates downward relative to the backrest rod 001, the first hinge seat 211 moves downward relative to it, thereby folding the second folding mechanism 022. Conversely, when the second rotating rod 222 rotates upward relative to the backrest rod 001, the second hinge seat 221 moves upward relative to it, thereby opening the second folding mechanism 022.

[0038] The telescopic rod 023 includes a first connecting rod 231 mounted on the first folding mechanism 021, and a second connecting rod 232 with one end located inside the first connecting rod 231 and the other end located on the second folding mechanism 022. The end of the second connecting rod 232 located inside the first connecting rod 231 is movably connected to the first connecting rod 231. One end of the first connecting rod 231 is sleeved on one end of the second connecting rod 232, and the two are movably connected to allow the telescopic rod 023 to extend or retract during folding or unfolding. The telescopic rod 023 also includes a limiting member 233 to prevent the second connecting rod 232 from moving within the first connecting rod 231; that is, the limiting member 233 is located within the second connecting rod 232. Specifically, when the backrest folding structure is unfolded, the telescopic rod 023 retracts, and the limiting member 233 prevents the telescopic rod 023 from further retracting or extending.

[0039] The limiting member 233 includes an elastic part 2331 located inside the second connecting rod 232 and having elasticity and being V-shaped, and a limiting part 2332 disposed on the elastic part 2331. The first connecting rod 231 is provided with a first through hole 2311 for the limiting part 2332 to pass through, and the second connecting rod 232 is provided with a second through hole 2321 for the limiting part 2332 to pass through. When the backrest folding structure is unfolded, the limiting part 2332 can pass through the first through hole 2311 and the second through hole 2321 to play a limiting role, preventing the second connecting rod 232 from moving inside the first connecting rod 231. Specifically, before the telescopic rod 023 is shortened, the limiting part 2332 is located inside the second through hole 2321 and abuts against the inner side wall of the first connecting rod 231. When the backrest folding structure is unfolded, the telescopic rod 023 is shortened, and the second connecting rod 232 moves inside the first connecting rod 231, driving the limiting part 233 to move. When it reaches the first through hole 2311, due to the elasticity of the elastic part 2331, that is, under the action of elastic potential energy, the limiting part 2332 is pressed into the first through hole 2311 to achieve the limiting.

[0040] The first folding mechanism 021 is also provided with a pressing part 2111 for pressing the limiting part 2332. Specifically, the pressing part 2111 is located on the first hinge seat 211. When the limiting part 2332 is located in the first through hole 2311, the pressing part 2111 presses down on the limiting part 2332, causing the elastic part 2331 to be compressed into the first through hole 2311. Since the end of the limiting part 2332 is an arc surface, only a small amount of external force is needed to extend the telescopic rod 023, thereby releasing the restriction of the limiting member 233 and allowing the backrest folding structure to be folded. The pressing part 2111 is directly integrally formed onto the first hinge seat 211, and both the first hinge seat 211 and the second hinge seat 221 can be made of plastic parts and can be integrally formed by injection molding. The inner side of the pressing part 2111 is designed to fit the outer shape of the telescopic rod 023 in an arc shape, and a step part 2112 is provided on the inner side of the arc shape corresponding to the limiting part 2332. The step part 2112 allows the limiting part 2332 to be pressed in better.

[0041] The first hinge seat 211 has first grooves on both sides for connecting the first rotating rod 212, and a second groove in the middle for the first connecting rod 231 to be inserted. The second hinge seat 221 has third grooves on both sides for connecting the second rotating rod 222, and a fourth groove in the middle for one end of the second connecting rod 232 to be inserted. Specifically, the first rotating rod 212 is inserted into the first groove or the second rotating rod 222 is inserted into the third groove, and then rotation is achieved by fixing with rivets or by locking with bolts and nuts. The connection between the other end of the first rotating rod 212, the other end of the second rotating rod 222 and the backrest rod 001 can also be fixed with rivets or locked with bolts and nuts. The fixing method of the first connecting rod 231 being inserted into the second groove and the fixing method of the second connecting rod 232 being inserted into the fourth groove can be referred to the above.

[0042] Please see Figures 1 to 11 This utility model also provides a folding recliner with a backrest folding structure. The folding recliner also includes two sets of supporting folding components, a third folding mechanism 006 for connecting the two supporting folding components and being foldable, and a support mechanism 007 for connecting the backrest rod 001 below to the supporting folding components. The supporting folding components are set corresponding to the backrest rod 001. The third folding mechanism 006 includes two limiting pieces 071 located on both sides of the supporting folding components and rotatably connected to the supporting folding components at one end, a limiting seat 072 set at the other end of the two limiting pieces 071, and a limiting sleeve 723 set between the limiting seat 072 and the backrest rod 001. The limiting seat 072 is provided with a limiting groove 721 that can abut against the supporting folding components. When the recliner is folded, the two limiting pieces 071 drive the limiting seat 072 to first move away from the rear support leg 032 of the supporting folding components, and then rotate downwards.

[0043] The supporting folding assembly includes a front support leg 031 and a rear support leg 032 connected at the top by a rotating shaft, a seat support rod 004 with one end rotatably connected to the backrest rod 001 and the middle or near the middle position rotatably connected to the front support leg 031, and an armrest 005 with one end rotatably connected to the backrest rod 001. An adjustment seat 051 is provided below the armrest 005 between the front support leg 031 and the rear support leg 032. The adjustment seat 051 is provided with an adjustment channel 511 for the rotating shaft to pass through and several stop slots 512 for locking the rotating shaft. Several stop slots 512 are located above the adjustment channel 511 and communicate with the adjustment channel 511. Different stop slots 512 correspond to different angles of the backrest folding structure, so as to realize the adjustment of the backrest folding structure. The front support leg 031 and the rear support leg 032 can rotate above the pivot shaft to achieve folding or unfolding. The third folding mechanism 006 includes two first folding rods 061 that are hinged together in the middle. The upper part of the first folding rod 061 is rotatably connected to the seat support rod 004, and the lower part is rotatably connected to the front support leg 031. The rotation connection of this utility model can be achieved by directly riveting with rivets, or by connecting the rotatable connection with a nut after passing through a bolt, or by using one or two U-shaped seats to achieve the rotational connection. The specific fixing and installation methods all adopt existing technologies. For example, a U-shaped seat is welded to the end of the backrest rod 001, and one end of the seat support rod 004 is embedded in the groove of the U-shaped seat. Then, rivets or bolts are used with nuts to achieve the rotational connection between the seat support rod 004 and the backrest rod 001, thereby satisfying the folding or unfolding function.

[0044] In summary, the backrest folding structure of this utility model, by setting a first folding mechanism, a second folding mechanism, and a telescopic rod, forms an "I"-shaped structure when the folding chair is unfolded, which can support flexible fabrics such as Oxford cloth and prevent collapse.

[0045] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

[0046] It should be noted that, in this document, relational terms such as “first” and “second” are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

Claims

1. A backrest folding structure, characterized in that, Includes two backrests arranged side by side, and a backrest folding assembly disposed on the two backrests and used to move the two backrests away from or close to each other; The back-to-back folding assembly includes a first folding mechanism located at the top and rotatably connected to two back-to-back rods at both ends, a second folding mechanism located at the bottom and rotatably connected to two back-to-back rods at both ends, and a telescopic rod disposed between the first folding mechanism and the second folding mechanism for bringing the middle parts of the first folding mechanism and the middle parts of the second folding mechanism closer to or further apart from each other.

2. The backrest folding structure according to claim 1, characterized in that, The first folding mechanism includes a first hinge seat and two first rotating rods disposed between the first hinge seat and the backrest rod. One end of the first rotating rod is rotatably connected to the first hinge seat, and the other end is rotatably connected to the backrest rod.

3. The backrest folding structure according to claim 1, characterized in that, The second folding mechanism includes a second hinge seat and two second rotating rods disposed between the second hinge seat and the backrest rod. One end of the second rotating rod is rotatably connected to the second hinge seat, and the other end is rotatably connected to the backrest rod.

4. The backrest folding structure according to claim 1, characterized in that, The telescopic rod includes a first connecting rod disposed on the first folding mechanism above, and a second connecting rod disposed at one end inside the first connecting rod and at the other end on the second folding mechanism. The end of the second connecting rod located inside the first connecting rod is movably connected to the first connecting rod.

5. A backrest folding structure according to claim 4, characterized in that, The telescopic rod also includes a limiting member to prevent the second connecting rod from moving within the first connecting rod.

6. A backrest folding structure according to claim 5, characterized in that, The limiting member includes an elastic part located inside the second connecting rod and having elasticity and being V-shaped, and a limiting part disposed on the elastic part. The first connecting rod is provided with a first through hole for the limiting part to pass through, and the second connecting rod is provided with a second through hole for the limiting part to pass through.

7. A backrest folding structure according to claim 6, characterized in that, The first folding mechanism is also provided with a pressing part for pressing the limiting part.

8. A backrest folding structure according to claim 7, characterized in that, The inner side of the pressing part is designed to fit the shape of the telescopic rod in an arc shape, and a step is provided on the inner side of the arc shape corresponding to the limiting part.

9. A folding recliner, characterized in that, The folding recliner, employing a backrest folding structure as described in any one of claims 1-8, further includes two sets of supporting folding components, a first folding mechanism for connecting the two supporting folding components and being foldable, and a support mechanism for connecting the backrest rod to the supporting folding components. The supporting folding components are arranged corresponding to the backrest rod. The folding mechanism includes two limiting pieces located on both sides of the supporting folding components and rotatably connected to the supporting folding components at one end, a limiting seat disposed at the other end of the two limiting pieces, and a limiting sleeve disposed between the limiting seat and the backrest rod. The limiting seat is provided with a limiting groove that can abut against the supporting folding components.

10. A folding recliner according to claim 9, characterized in that, The supporting folding assembly includes a front support leg and a rear support leg connected at the top by a rotating shaft, a seat support rod with one end rotatably connected to the backrest and the middle or near the middle position rotatably connected to the front support leg, and an armrest with one end rotatably connected to the backrest. An adjustment seat is provided below the armrest between the front support leg and the rear support leg. The adjustment seat is provided with an adjustment channel for the rotating shaft to pass through and several stop slots for locking the rotating shaft. The several stop slots are located above the adjustment channel and communicate with the adjustment channel.

Images