Folding chair frame and folding chair with the frame installed

Abstract

This utility model provides a folding chair frame and a folding chair with the frame installed. The folding chair frame includes two backrest rods, armrest rods, a rear cross rod, a front cross rod, a first side cross rod, a second side cross rod, and armrest support rods. The two armrest support rods are telescopic and their upper ends are pivotally connected to the corresponding armrest rods. The lower ends of the two armrest support rods are pivotally connected to the corresponding second side cross rods. A first sliding sleeve is pivotally connected to the middle of each of the two armrest support rods. The two first sliding sleeves are slidably fitted onto the corresponding first side cross rods. The advantages of this utility model are: by setting the first sliding sleeves on the armrest support rods, this utility model eliminates the need for the existing sliding rail structure on the armrest rods, while still achieving the folding function of the folding chair. Furthermore, it simplifies the armrest structure and avoids the risk of fingers being pinched during use.

Description

Technical Field

[0001] This utility model belongs to the field of outdoor leisure technology and relates to a folding chair. Background Technology

[0002] Folding chairs are lightweight and stackable, making them easy to move and saving space.

[0003] Some folding chairs, such as the folding chair with armrests disclosed in the authorization announcement number CN204654310U, use a sliding rail structure on the armrests to achieve the folding function. This design makes the armrest structure complex, increases the manufacturing cost, and poses a risk of pinching fingers during use. Utility Model Content

[0004] The technical problem to be solved by this utility model is how to design a folding chair to make its structure simpler.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A folding chair frame includes two backrest rods, two armrest rods, two rear cross rods, two front cross rods, two first side cross rods, two second side cross rods, and two armrest support rods. The two rear cross rods are pivotally connected to each other. The two front cross rods are pivotally connected to each other. The two first side cross rods are located on the left and right sides of the folding chair frame and are pivotally connected to the corresponding second side cross rods. The upper ends of the two first side cross rods are pivotally connected to the upper ends of the corresponding front cross rods, and the lower ends of the two first side cross rods are pivotally connected to the lower ends of the corresponding rear cross rods. The upper ends of the two second side cross rods are pivotally connected to the upper ends of the corresponding front cross rods. Each of the two second side crossbars is pivotally connected to the upper end of the corresponding rear crossbar, and the lower ends of the two second side crossbars are pivotally connected to the lower ends of the corresponding front crossbars. The middle parts of the two backrest bars are pivotally connected to the corresponding armrest bars, and the lower ends of the two backrest bars are pivotally connected to the middle parts of the corresponding first side crossbars. The two armrest support bars are telescopic structures. The upper ends of the two armrest support bars are pivotally connected to the corresponding armrest bars. The lower ends of the two armrest support bars are pivotally connected to the corresponding second side crossbars. The middle parts of the two armrest support bars are each pivotally connected to a first sliding sleeve. The two first sliding sleeves are slidably fitted onto the corresponding first side crossbars.

[0007] According to this technical solution, the folding function of the folding chair is achieved through the sliding engagement of the first sliding sleeve on the armrest support rod and the corresponding first side cross rod, as well as the telescopic structure of the two armrest support rods, simplifying the armrest structure. This avoids the risk of fingers being pinched by the traditional folding chair slide rail structure.

[0008] As a preferred embodiment, brackets are fixedly connected to the bottom of the two handrails, and the upper ends of the two handrail support rods are pivotally connected to the brackets on the corresponding sides.

[0009] According to this technical solution, by setting brackets protruding relative to the main body of the handrail below the two handrails, the pivot point of the handrail support rod can be designed independently of the main structure of the handrail, improving connection flexibility and assembly tolerance; and avoiding interference problems caused by the limitations of the cross-sectional dimensions of the handrail. Furthermore, placing the brackets below the handrails further prevents users' hands and clothing from contacting the pivot points, reducing the risk of friction and improving safety.

[0010] As a preferred embodiment, both supports are provided with U-shaped grooves that run through the front and back. The upper ends of the two handrail support rods are respectively accommodated in the corresponding U-shaped grooves and are pivotally connected to the two side walls of the U-shaped grooves by pins.

[0011] According to this technical solution, by placing the pivot point inside the bracket, hands and clothing are further prevented from getting caught in the pivot point, thus better protecting the user.

[0012] As a preferred embodiment, the upper ends of the two front crossbars are respectively provided with upper front hinge seats, and the upper ends of the two rear crossbars are respectively provided with upper rear hinge seats; the upper ends of the first side crossbars are respectively pivotally connected to the upper front hinge seats on the corresponding sides, and the upper ends of the second side crossbars are respectively pivotally connected to the upper rear hinge seats on the corresponding sides.

[0013] According to this technical solution, by independently connecting the upper end of each crossbar to the upper rear / upper front hinge seat, interference between the crossbars is avoided, thereby improving the rigidity and stability of the overall structure.

[0014] As a preferred embodiment, the upper ends of the two second side cross bars are pivotally connected to the areas near the ends, and the two second sliding sleeves are slidably fitted onto the backrest bars on the corresponding sides.

[0015] According to the technical solution, the newly added second sliding sleeve allows the second side crossbar to slide along the backrest bar through the second sliding sleeve during the folding process, making the folding trajectory of the rear crossbar of the folding chair more stable.

[0016] As a preferred embodiment, the lower ends of the two front crossbars are respectively provided with lower front hinge seats, and the lower ends of the two rear crossbars are respectively provided with lower rear hinge seats; the lower ends of the second side crossbars are respectively pivotally connected to the lower front hinge seats on the corresponding sides, and the lower ends of the first side crossbars are respectively pivotally connected to the lower rear hinge seats on the corresponding sides.

[0017] According to this technical solution, by independently connecting the lower ends of each crossbar to the lower front hinge and the lower rear hinge, motion interference between the crossbars is avoided. This also increases the contact area between the folding chair and the ground, reducing pressure on the ground and thus minimizing sinking when used on unpaved surfaces. Furthermore, when a single hinge wears out, only the corresponding part needs to be replaced, eliminating the need to replace the entire frame and reducing maintenance costs.

[0018] As a preferred embodiment, anti-slip pads are provided on the bottom end faces of both lower front hinge seats and both lower rear hinge seats.

[0019] According to this technical solution, anti-slip pads are provided on the bottom end faces of both lower front hinge seats and both lower rear hinge seats, which provides a better anti-slip effect when used on hardened surfaces.

[0020] As a preferred embodiment, the handrail support rod is a telescopic rod, which includes a thick section and a thin section. The thin section is movably disposed within the thick section and is located below. Two first sliding sleeves are pivotally connected to the thick section of the corresponding side handrail support rod.

[0021] According to the technical solution, the thinner section of the telescopic rod is located at the bottom, which can effectively prevent dust from entering the support rod through the gap between the thicker and thinner sections, avoiding telescopic jamming caused by long-term dust accumulation, thereby extending the service life of the handrail support rod.

[0022] A folding chair includes the folding chair frame described above, and also includes a seat fabric and a backrest fabric, both of which are flexible sheets; the front edge of the seat fabric is fixedly connected to the upper ends of two first side cross rods; the rear edge of the seat fabric is fixedly connected to the upper ends of two second side cross rods; the upper edge of the backrest fabric is fixedly connected to the upper ends of two backrest rods; and the lower edge of the backrest fabric is fixedly connected to the upper ends of two second side cross rods.

[0023] Furthermore, the rear edge of the folding seat fabric is fixedly connected to the lower edge of its backrest fabric, forming a continuous fabric structure. This integrated fabric structure makes the seat and backrest more comfortable and prevents items from easily falling through the gap between them. Attached Figure Description

[0024] Figure 1 This is a diagram showing the fully unfolded state of the present invention with the seat fabric removed;

[0025] Figure 2 This is a diagram showing the state of the present invention with the seat fabric removed and half-folded.

[0026] Figure 3 This is a diagram showing the state of the present invention with the seat fabric removed and the seat fully folded.

[0027] Figure 4 This is a schematic diagram of the structure of the bracket of this utility model;

[0028] Figure 5 This is a rendering of the fabric surface assembled with this utility model.

[0029] Explanation of reference numerals in the attached drawings: 1. Backrest rod; 2. Armrest rod; 3. Rear crossbar; 4. Front crossbar; 5. First side crossbar; 6. Second side crossbar; 7. Armrest support rod; 8. First sliding sleeve; 9. Bracket; 10. Upper front hinge seat; 11. Upper rear hinge seat; 12. Second sliding sleeve; 13. Lower front hinge seat; 14. Lower rear hinge seat; 15. Seat fabric; 16. Backrest fabric. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example

[0032] Please see Figures 1-5 The figure shows a folding chair frame, which includes two backrest rods 1, two armrest rods 2, two rear cross rods 3, two front cross rods 4, two first side cross rods 5, two second side cross rods 6, and two armrest support rods 7. In addition, it also includes eight hinge seats (two upper front hinge seats 10; two upper rear hinge seats 11; two lower front hinge seats 13; and two lower rear hinge seats 14).

[0033] The two rear cross rods 3 are located at the rear of the folding chair frame and are pivotally connected to each other at point A by a pin.

[0034] The two front cross bars 4 are located at the front of the folding chair frame and are pivotally connected to each other at point B by a pin.

[0035] The two first-side cross rods 5 located on the left and right sides of the folding chair are respectively pivotally connected to the corresponding second-side cross rods 6 at points C and D via pins.

[0036] Two upper front hinge seats 10 are mounted on the upper ends of the two front crossbars 4 via pins.

[0037] The upper ends of the two first-side crossbars 5 are respectively pivotally connected to the upper front hinge seats 10 installed on the upper ends of the corresponding front crossbars 4 via pins.

[0038] Two lower rear hinge seats 14 are mounted on the lower ends of the two rear crossbars 3 via pins.

[0039] The lower ends of the two first side cross rods 5 are respectively pivotally connected to the lower rear hinge seats 14 installed at the lower ends of the corresponding side rear cross rods 3 via pins;

[0040] Two upper rear hinge seats 11 are mounted on the upper ends of the two rear crossbars 3 via pins.

[0041] The upper ends of the two second-side crossbars 6 are respectively pivotally connected to the upper rear hinge seats 11 installed on the upper ends of the corresponding side rear crossbars 3 via pins.

[0042] Two lower front hinge seats 13 are mounted on the lower ends of the two front crossbars 4 via pins.

[0043] The lower ends of the two second-side crossbars 6 are respectively pivotally connected to the lower front hinge seat 13 installed at the lower end of the corresponding side front crossbar 4 via pins;

[0044] The eight intersecting rods and eight hinge seats of the folding chair frame are connected by the aforementioned pins to form four four-bar linkages, thereby enabling the legs of the folding chair frame to move from... Figures 1 to 2 Then Figure 3 The gathering and folding effect.

[0045] In this embodiment, the middle portions of the two backrest rods 1 are pivotally connected to the rear ends of the corresponding armrest rods 2 via pins, and the lower ends of the two backrest rods 1 are pivotally connected to the middle portions of the first side cross rods 5 on the corresponding sides via pins. The armrest support rod 7 is a telescopic rod, which includes a thick section and a thin section. The thin section is movably disposed within the thick section, and the thin section is located below. When the folding chair is fully unfolded, the thin section is completely hidden inside the thick section, such as... Figure 1 As shown, when the chair frame is folded together, as... Figure 2 as well as Figure 3The extended, thinner section increases the length of the armrest support rod, achieving a folding effect. The first sliding sleeve 8 is pivotally connected to the thicker section of the armrest support rod 7 via a pin and slidably fitted onto the corresponding first side cross rod 5. The thinner section of the telescopic rod, positioned below, effectively prevents external dust from entering the interior through the gaps in the fittings, thus avoiding dust accumulation that could cause the armrest support rod to jam during extension and retraction. By providing the first sliding sleeve 8 and the telescopic rod structure on the armrest support rod 7, the traditional slide rail structure on the armrest rod 2 can be omitted. This simplifies the armrest structure of the folding chair while ensuring the structural strength of the chair frame, avoiding the risk of fingers being pinched during use. It is worth noting that in this embodiment, a bracket 9 is also fixedly connected below the armrest rod 2. The bracket 9 includes a U-shaped groove that runs through the front and back. The upper end of the armrest support rod 7 is inserted into this U-shaped groove, and the armrest support rod 7 is movably connected to the two side walls of the U-shaped groove of the bracket via a pin. In this embodiment, a bracket 9 with a U-shaped groove is provided below the armrest 2, so that the hinge point is inside the bracket 9. Therefore, when using the chair, placing your hand above the armrest is almost unaffected, and it also avoids the possibility of catching your clothes. In this embodiment, the upper ends of the two armrest support rods 7 are pivotally connected to the corresponding armrest 2 via the bracket 9; the lower ends of the two armrest support rods 7 are pivotally connected to the corresponding second side cross rod 6. The two sets of armrests 2 on the left and right sides, the retractable armrest support rods 7, the second side cross rod 6, and the backrest rod 1 form two four-bar linkages on the left and right sides, realizing the folding effect of the chair back and armrests. In this embodiment, all the pivot points of the four-bar linkages are connected by pins, but in other embodiments, other forms of pivot connection such as ball joints may also be used, which will not be described in detail here.

[0046] In addition, in this embodiment, the upper ends of the two second-side crossbars 6 near their ends are each pivotally connected to a second sliding sleeve 12 via a pin. The two second sliding sleeves 12 are slidably fitted onto the corresponding backrest rods 1. When the folding chair frame is folded up, the second-side crossbars 6 slide along the backrest rods 1 via the second sliding sleeves 12, making the folding trajectory of the rear crossbars of the folding chair more stable.

[0047] In addition, the bottom end faces of the two lower front hinge seats 13 and the two lower rear hinge seats 14 in this embodiment are each provided with four anti-slip pads (not shown in the attached drawings). The anti-slip pads are fixedly connected to the hinge seats by glue or rivets. The anti-slip pads can be made of rubber, silicone, PU, ​​PVC or other materials with anti-slip function. Their function is to increase the friction between the four support ends of the folding chair frame and the ground, prevent the chair from sliding or shifting during use, improve its stability, and make the folding chair frame suitable for different materials, such as wood flooring, tiles, and carpets.

[0048] When the folding chair frame and fabric surface of this embodiment are combined to form a folding chair, as shown in the example Figure 5As shown, both the seat fabric 15 and the backrest fabric 16 are soft fabrics that can be repeatedly folded and unfolded. The front edge of the seat fabric is fixedly connected to two upper front hinge seats 10 by rivets; the rear edge of the seat fabric is fixedly connected to two upper rear hinge seats 11 by rivets; the upper edge of the backrest fabric is fixedly connected to the upper end of two backrest rods by a fixing sleeve sewn onto the backrest fabric; the lower edge of the backrest fabric is fixedly connected to two upper rear hinge seats 11 by rivets. Simultaneously, the seat fabric and backrest fabric are formed by bending a single, continuous fabric surface, meaning the lower edge of the backrest fabric and the rear edge of the seat fabric are connected as a whole, making the entire fabric surface of the folding chair a complete and continuous structure. This integrated fabric structure of the seat and backrest fabrics is more comfortable, and items placed on it are less likely to fall through the gap between them.

Claims

1. A folding chair frame, comprising two backrest rods, two armrest rods, two rear cross rods, two front cross rods, two first side cross rods, two second side cross rods, and two armrest support rods, wherein the two rear cross rods are pivotally connected to each other; the two front cross rods are pivotally connected to each other; the two first side cross rods are respectively located on the left and right sides of the folding chair frame and are pivotally connected to the corresponding second side cross rods; the upper ends of the two first side cross rods are pivotally connected to the upper ends of the corresponding front cross rods, and the lower ends of the two first side cross rods are pivotally connected to the lower ends of the corresponding rear cross rods; the upper ends of the two second side cross rods are pivotally connected to the upper ends of the corresponding rear cross rods, and the lower ends of the two second side cross rods are pivotally connected to the lower ends of the corresponding front cross rods; the middle portions of the two backrest rods are pivotally connected to the corresponding armrest rods, and the lower ends of the two backrest rods are pivotally connected to the middle portions of the corresponding first side cross rods; characterized in that: The two handrail support rods are telescopic structures; The upper ends of the two handrail support rods are respectively pivotally connected to the handrail rods on the corresponding sides; The lower ends of the two handrail support rods are respectively pivotally connected to the second side cross rod on the corresponding side; The two handrail support rods are each pivotally connected to a first sliding sleeve at the middle. The two first sliding sleeves are slidably fitted onto the first side crossbars on the corresponding sides.

2. The folding chair frame according to claim 1, characterized in that: The two handrails are respectively fixedly connected to the bottom of the brackets, and the upper ends of the two handrail support rods are respectively pivotally connected to the brackets on the corresponding sides.

3. The folding chair frame according to claim 2, characterized in that: Both supports are provided with U-shaped grooves that run from front to back. The upper ends of the two handrail support rods are respectively accommodated in the U-shaped grooves on the corresponding sides and are pivotally connected to the two side walls of the U-shaped grooves by pins.

4. The folding chair frame according to claim 1, characterized in that: The upper ends of the two front crossbars are respectively provided with upper front hinge seats, and the upper ends of the two rear crossbars are respectively provided with upper rear hinge seats; the upper ends of the first side crossbars are respectively pivotally connected to the upper front hinge seats on the corresponding sides, and the upper ends of the second side crossbars are respectively pivotally connected to the upper rear hinge seats on the corresponding sides.

5. The folding chair frame according to claim 4, characterized in that: The upper ends of the two second-side crossbars are each pivotally connected to a second sliding sleeve near their ends, and the two second sliding sleeves are slidably fitted onto the backrest bar on the corresponding side.

6. The folding chair frame according to claim 4 or 5, characterized in that: The lower ends of the two front crossbars are respectively provided with lower front hinge seats, and the lower ends of the two rear crossbars are respectively provided with lower rear hinge seats; the lower ends of the second side crossbars are respectively pivotally connected to the lower front hinge seats on the corresponding sides, and the lower ends of the first side crossbars are respectively pivotally connected to the lower rear hinge seats on the corresponding sides.

7. The folding chair frame according to claim 6, characterized in that: The bottom end faces of the two lower front hinge seats and the two lower rear hinge seats are all provided with anti-slip pads.

8. The folding chair frame according to claim 1, characterized in that: The handrail support rod is a telescopic rod, which includes a thick section and a thin section. The thin section is movably disposed within the thick section and is located below. The two first sliding sleeves are pivotally connected to the thick section of the handrail support rod on the corresponding side.

9. A folding chair, comprising a folding chair frame according to any one of claims 1 to 8, characterized in that: It also includes a seat fabric and a backrest fabric, both of which are flexible sheets; The front edge of the seat fabric is fixedly connected to the upper end of the two first side cross rods; The rear edge of the seat fabric is fixedly connected to the upper end of the two second side cross rods; The upper edge of the backrest fabric is fixedly connected to the upper ends of the two backrest rods; The lower edge of the backrest fabric is fixedly connected to the upper end of the two second side cross bars.

10. The folding chair according to claim 9, characterized in that: The rear edge of the seat fabric is fixedly connected to the lower edge of the backrest fabric, so that the seat fabric and the backrest fabric form a continuous fabric structure.

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