Folding chair

Abstract

A folding chair comprises a front pin (100), a rear pin (200), a backrest and a seat cushion, the front pin (100) is connected with the rear pin (200) through a connecting piece (400), the backrest is arranged on the front pin (100), and one or more washers (300) are arranged on the front pin (100) and / or the rear pin (200). And the arc length of the edge of the bent base of the washer (300) is not greater than 50% of the perimeter of the front pin (100) or the rear pin (200).

Description

Technical Field

[0001] The utility model relates to a piece of furniture, in particular to a folding chair. Background Art

[0002] The existing folding chair comprises a front leg tube, a rear leg tube, a seat cushion, a backrest and a washer. The washer is a universal component, the bottom edge of the washer is directly fixed on the leg tube, and then rivets are inserted and connected to the seat cushion plate.

[0003] In the existing folding chair, the paint at the joint between the washer and the leg and the adjacent parts are easy to fall off and rust, and the hand is easily pinched. At the same time, the impact test strength of the folding chair is low because the connection between the washer and the leg is not firm. Therefore, it is necessary to design a new folding chair that can improve the connection strength between the washer and the leg, prevent the hand from being pinched, and prevent the paint from falling off and rusting. Utility Model Content

[0004] In order to solve the above-mentioned existing problems, the utility model provides a folding chair. The folding chair has a new type of washer. The new type of washer can improve the connection strength between the washer and the leg pipe, and can prevent hands from being pinched and paint from falling off and rusting.

[0005] According to several aspects, the utility model discloses a folding chair, including front tube feet, rear tube feet, a backrest, and a seat cushion, characterized in that it also includes a plurality of washers, and the length of the curved edge of the washer base is no more than 50% of the circumference of the connecting leg tube.

[0006] According to another aspect, the utility model discloses a folding chair, characterized in that the washer has a plurality of concave points of uniform specifications, and the concave points are respectively a first concave point, a second concave point, a third concave point, a fourth concave point, a fifth concave point, a sixth concave point, a seventh concave point, an eighth concave point, a ninth concave point, and a tenth concave point, wherein the first concave point, the second concave point, the third concave point, the fourth concave point, the fifth concave point, and the sixth concave point are located on the front side of the washer, and the centers of the first concave point, the second concave point, the third concave point, the fourth concave point, the fifth concave point, and the sixth concave point are on the same first axis; the seventh concave point, the eighth concave point, the ninth concave point, and the tenth concave point are located on the rear side of the washer, and the centers of the seventh concave point, the eighth concave point, the ninth concave point, and the tenth concave point are on the same second axis.

[0007] According to another aspect, the utility model discloses a folding chair, wherein the first axis and the second axis form an angle, and the angle ranges from 120° to 180°.

[0008] According to another aspect, the utility model discloses a folding chair, wherein the diameter of the concave point of the washer is D, and the range of D is 3 mm to 5 mm.

[0009] According to another aspect, the utility model discloses a folding chair, wherein the depth of the concave point of the washer is H, and the range of H is 1 mm to 2 mm.

[0010] According to another aspect, the utility model discloses a folding chair, wherein the first concave point, the second concave point, the third concave point, the fourth concave point, the fifth concave point and the sixth concave point of the washer are distributed equidistantly and / or unequally on the first axis, and the distance between any adjacent concave points is a, and the range of a is 5 mm to 14 mm.

[0011] According to another aspect, the utility model discloses a folding chair, wherein the seventh, eighth, ninth and tenth concave points of the washer are equidistant and / or unequally spaced on the second axis, and the distance between any adjacent concave points is b, and the range of b is 13 mm to 25 mm.

[0012] According to another aspect, the utility model discloses a folding chair, wherein the front tube pins and the rear tube pins are connected by a connecting piece.

[0013] According to another aspect, the utility model discloses a folding chair, wherein the angle between the front tube pin and the ground is 58.5° to 61.5°, and the angle between the front tube pin and the rear tube pin is 41.5° to 44.5°.

[0014] According to another aspect, the utility model discloses a folding chair, wherein the washer 300 has a guide groove 330 , and the guide groove 330 can guide the liquid in the washer 300 .

[0015] Further areas of applicability will become apparent from the description provided herein.It should be understood that the description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way.

[0017] Figure 1 It is the assembly diagram of the folding chair;

[0018] Figure 2 It is an assembly diagram with a washer 300 on the front pin 100;

[0019] Figure 3 This is the front view of the Washi 300;

[0020] Figure 4 This is the rear view of the Huasi 300;

[0021] Figure 5It is the side view of the Washi 300;

[0022] Figure 6 yes Figure 3 Further explanation about Huasi 300;

[0023] Figure 7 yes Figure 4 Further explanation about Huasi 300;

[0024] Figure 8 It is an assembly diagram of the folding chair fully unfolded;

[0025] Fig. 9 It is the assembly drawing of the folding chair fully folded;

[0026] Fig.10 It is a partial enlarged view of the washer 300 with the guide groove 330 cooperating with the pin;

[0027] Fig.11 is a plan view of a washer 300 having a guide groove 330;

[0028] Fig.12 is an assembly diagram of another embodiment of a folding chair, wherein a partial enlarged diagram of the cooperation between the washer and the tube foot is shown;

[0029] Fig.13 yes Fig.12 The enlarged partial view of the cooperation between the washer and the pin shown in the figure;

[0030] Fig.14 This is a partial view of the A-type matching of the washer and the pin;

[0031] Fig.15 This is a partial view of the B-type matching of the washer and the pin;

[0032] Fig.16 This is a partial view of the C-type matching of the washer and the pin;

[0033] Fig.17 This is a partial view of the D-type matching of the washer and the pin;

[0034] Fig.18 This is a partial view of the E-type matching of the washer and the pin;

[0035] Fig.19 This is a partial view of the F-type matching of the washer and the pin;

[0036] Fig. 20 This is a partial view of the washer and pin type I coordination;

[0037] Fig.21 This is a partial view of the J-type matching of the washer and the pin;

[0038] Fig. 22 This is a partial view of the K-type matching of the washer and the pin; and

[0039] Fig.23 This is a partial view of the L-type matching of the washer and the pin. DETAILED DESCRIPTION

[0040] The following detailed description illustrates the principles of the present invention by way of example and not limitation. This specification will clearly enable those skilled in the art to make and use the present invention, and describes several embodiments, modifications, variations, substitutions and uses of the present invention, including what is currently considered to be the best mode for implementing the present invention. It should be understood that the drawings are general and schematic representations of exemplary embodiments of the present invention, and do not limit the present invention, nor are they necessarily drawn to scale.

[0041] The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses.

[0042] When a component, element, or layer is referred to as being "on," "engaged to," "connected to," or "coupled to" another element or layer, it may be directly on, engaged to, connected to, or coupled to the other component, element, or layer, or there may be intermediate elements or layers. Conversely, when an element is referred to as being "directly on," "directly engaged to," "directly connected to," or "directly coupled to" another element or layer, there may be intermediate elements or layers. Other words used to describe the relationship between elements should be interpreted in a similar manner, such as "between" versus "directly between," "adjacent" versus "directly adjacent," etc. The terms "and / or" and "one or both" as used herein include any and all combinations of one or more associated listed items.

[0043] like Figure 1 and Figure 2 , Figure 5As shown, a folding chair comprises a front tube foot 100, a rear tube foot 200, a backrest, and a seat cushion. The front tube foot 100 and the rear tube foot 200 are connected by a connecting piece 400. The backrest is arranged on the front tube foot 100. One or more washers 300 are arranged on the front tube foot 100 and / or the rear tube foot 200. The characteristic is that the arc length of the edge of the bent base of the washer 300 is not greater than 50% of the circumference of the front foot tube 100 or the rear foot tube 200. Because the arc length of the edge of the bent base of the washer 300 is not greater than 50% of the circumference of the connecting foot tube, when the washer 300 is assembled with the front tube foot 100, the washer 300 can be directly attached to the front tube foot 100 without bending the washer 300. If the length of the washer 300's curved base edge is greater than 50% of the circumference of the connecting leg, the washer 300 needs to be deformed and bent when it is assembled with the front leg 100, which directly affects the initial stress distribution of the washer 300. And if the length of the washer 300's curved base edge is greater than 50% of the circumference of the connecting leg, it directly affects the selection of the front leg 100, and the diameter of the front leg 100 is limited by the washer 300. When the length of the washer 300's curved base edge is not greater than 50% of the circumference of the connecting leg, the diameter of the front leg 100 can be selected in a much larger range. The larger the diameter of the front leg 100, the larger the wall of the front leg 100, and the further improved the overall strength of the front leg 100, which is also conducive to strengthening the overall strength of the folding chair.

[0044] Continue to refer Figure 2 , the washer 300 is located in the middle of the slender section of the front tube pin 100. The front tube pin 100 includes: a slender section and a curved tube section, the length of the slender section is E, the length of the curved tube section is F, and the length of E is preferably twice that of F. The middle of the slender section is located between 1 / 2 and 1 / 3 of the length E. The washer 300 is located in the middle of the slender section of the front tube pin 100, which directly improves the overall force of the front tube pin 100 and directly improves the overall strength of the front tube pin 100.

[0045] refer to Figure 3 , Figure 3The front side of the washer 300 is shown, and the front side is indicated by reference numeral 103. The washer 300 has a plurality of concave points of uniform specifications, which are respectively a first concave point 301, a second concave point 302, a third concave point 303, a fourth concave point 304, a fifth concave point 305, a sixth concave point 306, a seventh concave point 307, an eighth concave point 308, a ninth concave point 309, and a tenth concave point 310, wherein the first concave point 301, the second concave point 302, the third concave point 303, the fourth concave point 304, the fifth concave point 305, and the sixth concave point 306 are located on the front side 103 of the washer 300, and the centers of the first concave point 301, the second concave point 302, the third concave point 303, the fourth concave point 304, the fifth concave point 305, and the sixth concave point 306 are on the same first axis 101. The six concave points are on the same axis (first axis 101), so that the force on the front side is uniform, and the force is not concentrated on a certain concave point, but is evenly distributed on the six concave points. The six concave points are used to perform processes such as bonding, joining, welding, connecting, and welding in the concave points. The bonding, joining, welding, connecting, and welding processes can improve the force strength of the concave points. After all the concave points are bonded, joined, welded, connected, and welded, the overall strength of the washer 300 is improved. In addition, the presence of these multiple concave points can prevent the paint on the washer from continuously falling off and rusting over a large area. When the paint starts to fall off from a certain position, the six concave points that are evenly and / or unevenly distributed can block the paint from continuously falling off and rusting over a large area, and can extend the service life of the paint.

[0046] refer to Figure 4 , Figure 4The rear side of the washer 300 is shown, and the front side is indicated by reference numeral 104. The washer 300 has a plurality of concave points of uniform specifications, which are respectively a first concave point 301, a second concave point 302, a third concave point 303, a fourth concave point 304, a fifth concave point 305, a sixth concave point 306, a seventh concave point 307, an eighth concave point 308, a ninth concave point 309, and a tenth concave point 310, wherein the seventh concave point 307, the eighth concave point 308, the ninth concave point 309, and the tenth concave point 310 are located on the rear side 104 of the washer 300, and the centers of the seventh concave point 307, the eighth concave point 308, the ninth concave point 309, and the tenth concave point 310 are on the same axis 102. The four concave points are on the same axis, so that the force on the rear side is evenly dispersed, and the force is not concentrated on a certain concave point, but is evenly distributed on four concave points. Therefore, the front side 103 and the rear side 104 of the washer 300 distribute stress on the first axis 101 and the second axis 102 respectively, thereby improving the overall strength of the washer 300. The four concave points are used to perform processes such as lamination, joining, welding, connection, and welding in the concave points, thereby improving the overall strength of the washer 300. In addition, the presence of the multiple concave points can prevent the paint from continuously falling off and rusting over a large area. When the paint starts to fall off from a certain position, the four evenly distributed concave points can prevent the paint from continuously falling off and rusting over a large area, thereby extending the service life of the paint.

[0047] refer to Figure 5 , Figure 5 A folding chair is shown, in which the first axis 101 and the second axis 102 form an angle Q, and the size is preferably 120° to 180°. The angle Q is not greater than 180°, so when the washer 300 is assembled with the front pin 100, the washer 300 can be directly attached to the front pin 100 without bending the washer 300. In addition, the angle facilitates the installation of the washer 300 on the front pin 100, and also facilitates the removal of the washer 300 from the front pin 100. The installation does not cost the service life of the washer 300, and the washer 300 can be repeatedly installed and removed without deformation (before the washer 300 is completely fixed to the pin) so as to adjust the relative position of the installed washer 300 and the pin. Continue to refer to Figure 5 The diameter of the concave point of the washer 300 is D, preferably 3 mm to 5 mm. Figure 5, the depth of the concave point is H, preferably 1mm to 2mm. The diameter of the concave points of the washer 300 is close to the size of a human finger. When the finger touches these concave points to unfold or fold the folding chair, the finger sinks into the concave points, and the concave spaces of the concave points are used to partially accommodate the finger on some of the concave points, so that the finger is not easily pinched in the cross-matching of the front pin 100 and the rear pin 200. Even if it is pinched, it can be properly buffered in the concave space of the concave points, so that it will not be pinched too seriously. Continue to refer to Figure 5 On the longitudinal axis, there is a drainage hole 105 at the confluence of the front side 103 and the rear side 104 of the washer 300. The drainage hole 105 is used to drain the liquid remaining on the washer 300 in time, accelerate the outflow of the liquid, reduce the risk of rust, extend the service life of the washer 300, and thus improve the performance of the chair as a whole.

[0048] refer to Figure 6 , Figure 6 right Figure 4 The first concave point 301, the second concave point 302, the third concave point 303, the fourth concave point 304, the fifth concave point 305, and the sixth concave point 306 of the washer 300 are equidistantly distributed on the first axis 101, and the distance between any adjacent concave points is a, preferably 5 mm to 14 mm. Figure 6 The convex portion 320 shown in the figure can support enough space during the folding or unfolding of the chair, so that enough space is maintained between the front pin 100 and the rear pin 200. This space can protect the user's fingers from being pinched. Combined with the concave space of the aforementioned concave point, the entire chair can provide good protection for the user's fingers during use.

[0049] refer to Figure 7 , Figure 7 Yes Figure 5 Further explanation. The seventh concave point 307, the eighth concave point 308, the ninth concave point 309, and the tenth concave point 310 of the washer 300 are equidistantly distributed on the second axis 102, and the distance between any adjacent concave points is b, preferably 13 mm to 25 mm. Because the distance a and the distance b are not the same, there are no two coaxial concave points in the front side 103 and in the rear side 104, and there are no two concave points whose central axes of the concave points intersect with each other. The central axes of the six concave points on the front side do not intersect or coplanar with the central axes of the four concave points on the rear side. Therefore, the overall force distribution of the washer 300 is more uniform, and the overall strength of the washer 300 is further improved.

[0050] refer to Figure 1 and Figure 8 , Figure 8The figure is an assembly diagram of the folding chair when it is fully unfolded. The angle between the front pin 100 and the ground is 58.5° to 61.5°. The angle between the front pin 100 and the rear pin 200 is 41.5° to 44.5°. The angle between the front pin 100 and the ground is 58.5° to 61.5°, which is close to 60°. When the angle is 58.5° to 61.5°, the folding chair is more stable in the unfolded state.

[0051] refer to Fig. 9 , Fig. 9 This is the assembly drawing of the folding chair when it is fully folded.

[0052] refer to Fig.10 and Fig.11 , the washer 300 has a guide groove 330, which can guide the liquid in the washer 300 to reduce the corrosion of the washer 300 caused by the liquid. At the same time, the guide groove 330 can enhance the stress strength of the washer 300. The washer 300 needs to be treated and cleaned before painting the chair frame, and relevant chemical solutions need to be applied during the cleaning process. The chemical solutions flow out as soon as possible through the guide groove 330 to prevent the washer 300 from unnecessary corrosion. At the same time, the washer 300 has a guide groove 330, which extends in the longitudinal direction of the washer 300, thereby enhancing the overall strength of the washer 300 and playing the role of a reinforcing rib.

[0053] refer to Fig.12 and Fig.13 , is an assembly diagram of another embodiment of a folding chair, which shows a partial enlarged view of the cooperation between the washer and the tube pin.

[0054] refer to Figures 14 to 23 , is an assembly diagram of another embodiment of a folding chair, which shows multiple embodiments of partial enlarged views of the cooperation between washers and tube pins.

[0055] The description of the present disclosure is merely exemplary in nature, and variations that do not depart from the gist of the present disclosure are intended to fall within the scope of the present disclosure. These variations should not be regarded as departing from the spirit and scope of the present disclosure.

[0056] Words used to indicate a heading or direction of travel should not be considered limiting. Thus, words such as "front," "front side," "rear side," "back," "side," "up," "down," "upper," "lower," "top," "bottom," "forward," "backward," "toward," "distal," "proximal," "inside," "outside," and their synonyms, antonyms, and derivatives thereof are selected merely for convenience, unless the context indicates otherwise. One or more inventors may provide exemplary embodiments of various different claimed subject matter in any particular manner, and the claimed subject matter is intended to include such manner.

[0057] Optional embodiments of the present invention may also be broadly included, individually or collectively, in the parts, elements and features referred to or cited herein, in any or all combinations of two or more of the parts, elements or features, and the specific integration mentioned herein, which has known equivalents in the field to which the present invention relates, and these known equivalents are deemed to be incorporated herein as if listed separately.

[0058] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, and tenth, it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features. "Eleventh", "Twelfth", "Nth" or more can be set according to actual needs.

Claims

1. A folding chair, comprising a front tube foot (100), a rear tube foot (200), a backrest, and a seat cushion, wherein the front tube foot (100) and the rear tube foot (200) are connected via a connecting piece (400), the backrest is arranged on the front tube foot (100), and one or more washers (300) are arranged on the front tube foot (100) and / or the rear tube foot (200), characterized in that: The arc length of the curved base edge of the washer (300) is no greater than 50% of the circumference of the front pin (100) or the rear pin (200).

2. A folding chair according to claim 1, characterized in that: The washer (300) has a plurality of concave points of uniform specifications, and the concave points include: a first concave point (301), a second concave point (302), a third concave point (303), a fourth concave point (304), a fifth concave point (305), a sixth concave point (306), a seventh concave point (307), an eighth concave point (308), a ninth concave point (309), and a tenth concave point (310), The first concave point (301), the second concave point (302), the third concave point (303), the fourth concave point (304), the fifth concave point (305), and the sixth concave point (306) are located on the front side (103) of the washer (300), and the centers of the first concave point (301), the second concave point (302), the third concave point (303), the fourth concave point (304), the fifth concave point (305), and the sixth concave point (306) are on the same first axis (101); the seventh concave point (307), the eighth concave point (308), the ninth concave point (309), and the tenth concave point (310) are located on the rear side (104) of the washer (300), and the centers of the seventh concave point (307), the eighth concave point (308), the ninth concave point (309), and the tenth concave point (310) are on the same second axis (102).

3. A folding chair according to claim 2, characterized in that: The first axis (101) and the second axis (102) form an angle Q, and the magnitude of Q is 120° to 180°.

4. A folding chair according to claim 2 or 3, characterized in that: The diameter of the concave point of the washer (300) is D, and D is 3 mm to 5 mm.

5. A folding chair according to claim 2 or 3, characterized in that: The depth of the concave point of the washer (300) is H, and H is 1 mm to 2 mm.

6. A folding chair according to claim 3, characterized in that: The first concave point (301), the second concave point (302), the third concave point (303), the fourth concave point (304), the fifth concave point (305), and the sixth concave point (306) of the washer (300) are distributed equidistantly and / or unequally on the first axis (101), and the distance between any adjacent concave points is a, and a is 5 mm to 14 mm.

7. A folding chair according to claim 3, characterized in that: The seventh concave point (307), the eighth concave point (308), the ninth concave point (309), and the tenth concave point (310) of the washer (300) are distributed equidistantly and / or unequally on the second axis (102), and the distance between any adjacent concave points is b, and b is 13 mm to 25 mm.

8. A folding chair according to claim 1, characterized in that: There is a drainage hole (105) at the junction of the front side (103) and the rear side (104) of the washer (300), and the drainage hole (105) is used to drain the liquid remaining on the washer (300) in time.

9. A folding chair according to claim 1 or 8, characterized in that: The included angle between the front pin (100) and the ground is 58.5° to 61.5°, and the included angle between the front pin (100) and the rear pin (200) is 41.5° to 44.5°.

10. The folding chair according to claim 1, characterized in that: The washer (300) has a guide groove (330), and the guide groove (330) can guide the liquid in the washer (300).

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