FOLDING CHAIR

Abstract

The utility model relates to a folding chair with a sliding back and a folding structure of its backrest tube. The folding structure of the backrest tube comprises a backrest tube and a supporting foot tube. The lower part of the backrest tube is installed on the supporting foot tube through a first connector, and the backrest tube and the first connector are rotated and connected through a rotating shaft. When the folding chair is in the folding state, the rotating shaft can slide along the elongated through the hole wall, making the backrest tube slide relative to the supporting foot tube. The folding chair of the utility model increases a long waist type slot on the backrest, and the backrest can slide down after the chair folded to reduce the length of the whole chair and reduce the packaging size.

Description

The invention relates to a with a sliding back and a folding structure of the back tube Technical field The utility model relates to the technical field of a , in particular to a with a sliding back and a folding structure of the backrest tube thereof. Background technique V\th the continuous improvement of people's living standards, more and more people like to go out playing in the park or the field. They need outdoor chairs that are easy to carry and can be placed stably on the soft floor. However, the existing s are generally composed of the chair surface, backrest and two chair legs hinged together, the chair surface is hinged in two chair legs, and then hinged with the backrest tube, although it can also fold, however, the folded chair is still large in size, and it is not convenient to store and carry. Therefore, while ensuring the strength of the chair, it is also necessary to reduce the packing size of the chair after folding so that it is easy to carry. Utility model content In order to solve the above technical problem, the utility model aims to provide a with a sliding back and a folding structure of the backrest tube, which can greatly reduce the storage volume of the . In order to realize the purpose of the utility model, the utility model adopts the following technical scheme: The backrest tube folding structure comprises a backrest tube and supporting foot tubes, the lower part of the backrest tube is arranged on the supporting foot tube through the first connector, the backrest tube and the first connector are connected through a rotating shaft, the lower end of the backrest tube is provided with an elongated through hole, the rotating shaft through the elongated through hole, when the is in a folding state, the rotating shaft can slide along the wall of the elongated through hole, make the backrest tube slide relative to the supporting foot tube. As a preferred option, the lower end of the backrest tube is also provided with a sliding sleeve with an elongated through hole, and the elongated through hole on the sliding sleeve is at least partially aligned with the elongated through hole on the backrest tube. As a preferred solution, the sliding sleeve is a plastic material, and the rotating shaft can slide relative to the wall of the elongated through hole in the sliding sleeve. The with sliding backrest, including all of the above mentioned backrest tube folding structure, also includes a chair seat tube, when the is in the open state, the chair tube is arranged at the lower part of the backrest tube, and the bottom end of the backrest tube is connected with the chair seat tube, one end of the chair seat tube through a rotating shaft and the first connector of a supporting foot tube rotation connection. The other end of the chair seat seat tube is hinged on another supporting foot tube. As a preferred option, the chair seat tube is hinged with a rotating shaft on the first connector through a second connecor. As a preferred option, the second connector is U-shaped, the lower end of the backrest tube is located at the U-shaped opening of the second connector, and at least part of the slide sleeve is also located at the U-shaped opening. As a preferred option, the first connector is a rotator, and one end of the rotator is hinged with the supporting foot tube, and the other end of the rotator can be connected with the supporting foot tube. As a preferred option, an armrest is also included, and the lower middle part of the backrest tube is hinged with one end of the armrest, and the middle part of the armrest is hinged with the upper part of the two support foot tubeso As a preferred option, the backrest tube, supporting foot tube and chair seat tube are U-shaped. The of the utility model increases an elongated through hole on the backrest, and the backrest can slide down to reduce the length after the chair is folded, that is, the distance between the upper part of the backrest tube and the lower part of the supporting foot tube after folding is the shortest, and the packaging volume can be further reduced. Instruction with pictures The drawings attached to the specification of this application are used to provide further understanding of this application, schematic embodiments of this application and their descriptions are used to interpret this application and do not constitute a qualification of this application.. Figure 1 is the structure diagram of the chairwhen the utility model is opened; Figure 2 is the disassembly structure diagram of the backrest tube and slide sleeve of the utility model; Figure 3 is a local enlarged structure diagram of the backrest tube and slide sleeve of the utility model; Figure 4 is a comparison diagram of the backrest tube when the utility model chair is folded without sliding and after sliding; The marks in the attached drawings are: 1. sackrest tube; 2, armrest; 3, sliding sleeve; 4, connecting parts; 5, rotators; 6, support foot tube; 7. seat tube. Specific implementation mode lt should be noted that the following detailed instructions are illustrative and are intended to provide further clarification of this application. Unless othenivise indicated, all technical and scientific terms used herein have the same meaning as would normally be understood by a person of ordinary skill in the field of technology to which this application belongs. lt is important to note that the terms used here are intended only to describe specific embodiments and are not intended to limit exemplary embodiments under this application. As used here, the singular form is also intended to include the plural form unless the context expressly indicates othenivise, and it should also be understood thatwhen the terms "contain" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations of them. ln addition, in the description of the utility model, it is necessary to understand that, the term "center", "vertical", "horizontal", "length", "width", "thickness" and "up", "down", "before" and "after", "left", "right" and "vertical", "level", "top", "bottom" "inside", "clockwise" and "rotate" indicates a location or position relations based on the location or position shown in the appended drawings, it is only for the convenience of describing and simplifying the description of the utility model, but not to indicate or imply that the device or element referred to must have a specific orientation, construction and operation in a specific orientation, and therefore cannot be understood as a limitation of the utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or as implicitly indicating the quantity of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more such features. In the description of the utility model, "multiple" means two or more unless otherwise expressly qualified. In the utility model, unless otherwise expressly specified and limited, the terms "installation", "connection", "connection", "fixed" and other terms shall be broadly understood, for example, can be fixed connection, can also be detachable connection, or one connection; Can be mechanical connection, can also be electrical connection; It can be directly connected, or it can be indirectly connected through an intermediate medium, and it can be the connection within the two components. For ordinary technical personnel in the field, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. In the utility model, unless otherwise expressly specified and limited, the first feature may include direct contact between the first and second features "above" or "below" the second feature, or the first and second feature may not be in direct contact but through another feature contact between them. Furthermore, the first feature "above" the second feature include the first feature being directly above and diagonally above the second feature, or simply indicating that the first feature is at a higher level than the second feature. The first feature "below" the second feature include the first feature being directly below and diagonally below the second feature, or simply indicating that the first feature is less horizontal than the second feature. The utility model is further explained in combination with the drawings and embodiments below: The with sliding backrest shown in Figure 1 comprises a backrest tube folding structure, armrest 2 and chair seat tube 7. The backrest tube folding structure comprises a backrest tube 1 and a supporting foot tube 6. The backrest tube 1, supporting foot tube 6 and chair seat tube 7 are all U-shaped, and the upper part of the two supporting foot tubes 6 are close to each other to form an inverted V-shaped Angle. The upper part of the two supporting foot tube 6 is respectively hinged with the middle of the two armrests 2, the two armrests 2 are respectively hinged on both sides of the lower part of the backrest tube 1, the lower part of the backrest tube 1 is arranged on the supporting foot tube 6 through the first connector, and the backrest tube 1 is connected with the first connector through a rotating shaft, the lower end of the backrest tube 1 is provided with a long through hole, When the is in a folding state, the rotating shaft can slide along the wall of the elongated through hole, so that the backrest tube slides relative to the supporting foot tube. When the rotating shaft is located at the top end of the elongated through hole, the overall length of the after folding is the smallest, that is, the distance between the upper part of the backrest tube and the lower part of the supporting foot tube after folding is the shortest, which can further reduce the packaging volume. The first connector is a rotator 5, and one end of the rotator 5 is hinged with the supporting foot tube 6, and the other end of the rotator 5 can be connected with the supporting foot tube 6. When the is in the open state, the chair seat tube 7 is arranged at the lower part of the backrest tube 1, and the bottom end of the backrest tube 1 is connected with the chair seat tube 7, one end of the chair seat tube 7 is rotatively connected with the rotator 5 of a supporting foot tube 6 through a rotating shaft, and the other end of the chair seat tube 7 is hinged on another supporting foot tube 6. A U-shaped second connector 4 is fixed on the chair seat tube 7, the chair seat tube 7 is located at the U-shaped bottom of the second connector 4, the lower end of the backrest tube 1 is located at the U-shaped opening of the second connector 4, and the U-shaped second connector 4 is hinged with the rotating shaft of the rotator 5. As shown in Figures 2 and 3, the lower end of the backrest tube 1 is also provided with a sliding sleeve 3 with an elongated through hole, at least part of the sliding sleeve is also located at a U-shaped opening, and the elongated through hole on the sliding sleeve 3 is at least partially aligned with the elongated through hole on the backrest tube 1. In this embodiment, in order to maximize the proximity of the backrest tube to the supporting foot tube after folding the , and thus reduce the length, the elongated through hole on the slide sleeve 3 is completely aligned with the elongated through hole on the backrest tube 1. The sliding sleeve is made of plastic material, and the rotating shaft can slide relative to the elongated through hole wall of the sliding sleeve. The setting of the sliding sleeve can reduce the friction between the backrest tube and the rotating shaft, improve the smoothness of the folding process of the , and because the backrest tube and the rotating shaft are mostly metal parts, reducing the friction between each other can also avoid the generation of noise. The bottom of the backrest tube of the utility model is provided with an elongated through hole, and a sliding sleeve with an elongated through hole is fixed, and then a backrest system is formed with the armrest, and then the chair is formed as a whole through the rotator and the second connector and the supporting foot tube 6 and the chair seat tube 7 respectively. After the is folded, the backrest tube is pressed down towards the supporting foot tube 6. Because there are elongated through holes in the lower part of the backrest tube, the backrest system will slide down (Figure 4), so that the packaging volume of the entire chair becomes smaller. Compared with the conventional , the backrest of the utility model has only round holes instead of elongated through holes, and the backrest system will not slide down when it is folded, and the packaging volume is relatively large; Therefore, the of the utility model increases an elongated through hole on the backrest, and the backrest can slide down after the chair is folded to reduce the length of the whole chair and reduce the packaging volume. In the description of this specification, the reference terms "an embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc., refer to the specific features, structures, materials, or characteristics combined with the embodiment or description of the example contained in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to identical embodiments or examples. Further, the specific features, structures, materials or features described may be combined in a suitable manner in any one or more embodiments or examples. Notwithstanding that embodiments of the utility model have been shown and described above, it can be understood that the embodiments are exemplary and cannot be construed as limitations of the utility model, and that the embodiments may be changed, modified, replaced or modified by ordinary technicians in the field within the scope of the utility model without deviating from the principle and purpose of the utility model. Any simple modification, equivalent change and modification of the above embodiments in accordance with the technical essence of the utility model shall still fall within the scope of the technical scheme of the utility model.

Claims

1. Folding structure for a back support comprising a back support tube (1) and a supporting leg tube (6), the lower part of the back support tube (1) is attached to the supporting leg tube (6) by the first connector, and the back support tube (1) is connected to the first connector by a rotating shaft, with the feature that the lower end of the back support tube (1) is provided with an elongated through hole, and the rotating shaft runs through the elongated through hole, where the rotating shaft is mounted along the wall to slide out of the elongated through hole, such that the back support tube (1) relative to the supporting leg tube (6) slides when the folding chair is in a folded state.

2. Folding structure for a back support within the meaning of claim 1, characterized by the fact that the lower part of the back support tube (1) is fitted with a sliding sleeve (3) with an elongated through hole, the elongated through hole on the sliding sleeve (3) is at least partially aligned with the elongated through hole on the back support tube (1).

3. Folding structure for a back support within the meaning of claim 2, characterized by the fact that the sliding sleeve (3) is a plastic material, and the rotating shaft is relative to relative to a wall of the elongated through hole of the sliding sleeve can to shove.

4. Folding chair with a sliding backrest comprising a folding structure for a back support according to one of conclusions 1 to 3 and a tube (7) of a chair seat, where the tube (7) of a chair seat is attached to the lower part of the back support tube (1), and the lower end of the back support tube (1) is connected to the tube (7) of a chair seat when the folding chair is unfolded and where one The end of the tube (7) of a seat is rotatably connected to the first connector of a supporting leg tube (6) through a rotating shaft, and the other end of the tube (7) from a seat on another supporting leg tube (6) hinges.

5. The folding chair according to claim 4, characterized by the tube (7) of a chair seat pivots with the rotation shaft on the first connector through the second connector (4).

6. The folding chair within the meaning of claim 4, characterized by the fact that the second connector (4) is U-shaped, the lower end of the back support tube (1) on the U- shaped opening of the second connector (4) is located, and at least a part of the sliding sleeve (3) is also located on the U-shaped opening.

7. The folding chair according to one of claims 4 to 6, characterized in that the first connector a rotator (5) is, and one end of the connector (5) with the supporting leg tube (6) hinges, and the other end of the rotator (5) can be connected to the supporting leg tube (6).

8. The folding chair according to one of conclusions 4 to 6, comprising armrests (2), where the lower middle part of the back support tube (1) with one end of the armrest (2) hinges, and the middle part of the armrest (2) with the upper part of two supporting leg tubes (6) hinges.

9. The folding chair according to one of claims 4 to 6, characterized in that the back support tube (1), the supporting leg tube (6) and the tube (7) of a The chair seat should be U-shaped. 1 / 3 Fig.1

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