A stand for seating
By designing a grandstand chair frame with specific rod structures and connection methods, the problems of insufficient foldability, stability, and inconvenient operation of existing folding grandstand chairs have been solved, achieving stable support, simple folding, and portability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- IRIK(XIAMEN) OUTDOOR CO LTD
- Filing Date
- 2025-07-02
- Publication Date
- 2026-07-07
AI Technical Summary
Existing folding grandstand chairs suffer from insufficient foldability, large folded size making them inconvenient to carry, an unsimplistic structure, and difficulty in unfolding and folding. They also lack stability and support.
A grandstand chair frame was designed, including a pivotally connected support base and backrest. It adopts a specific rod structure and connection method, which makes the chair frame have good support when unfolded, and achieves convenient folding operation through simplified rod connection relationship. There is an interlocking relationship between the rods, and the folded size is small and easy to carry.
It achieves stable support for the grandstand chair frame, is easy to fold and retract, is compact and portable, and improves user comfort.
Smart Images
Figure CN224461349U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of outdoor products technology, and in particular to a grandstand chair frame. Background Technology
[0002] With the vigorous development of social productivity, people's material enjoyment and spiritual pursuits have been greatly improved. As a result, there are more and more large-scale sports competitions, concerts, parties and other events held in indoor stadiums or outdoor stadiums. In these venues, the stands are generally tiered, and there are fixed seats on the stands for the audience to sit and watch the game.
[0003] The seating in tiered stands is designed with spectator comfort and safety in mind, typically using durable materials such as plastic or metal to withstand the weight of spectators and the pressure of prolonged use. However, this design results in seats that are relatively hard and bulky, sacrificing some comfort (the sitting and backrest areas are stiff), and the seats are prone to aging or damage over time, leading to a decline in safety performance.
[0004] Therefore, portable grandstand chairs have emerged. These chairs can be folded and carried, allowing spectators to unfold and place them on the stands. However, existing folding grandstand chairs suffer from insufficient folding capability, resulting in a large folded volume that is inconvenient to carry. Their structure is also not simple enough, and they are difficult to operate when unfolding and folding. To reduce the folded volume, some grandstand chairs have had certain structural members removed from the frame and replaced with chair fabric. However, removing some members may reduce the stability and support of the grandstand frame. Utility Model Content
[0005] The purpose of this utility model is to provide a grandstand chair frame that is easy to fold, has good support, and has a small folded volume.
[0006] To achieve the above objectives, this utility model provides a grandstand chair frame, including a support base and a backrest that are pivotally connected to each other;
[0007] The support base includes two parallel main rods and a first folding rod group pivotally connected between the two main rods. The two main rods are L-shaped with their rear ends bent upwards. Each main rod has a horizontal part and an upwardly bent vertical part.
[0008] The first folding rod group includes four vertical main rods and a first support rod. The first support rod is parallel to the two main rods and is located between the two main rods. The rear end of the first support rod also bends upwards with the main rods for a certain height.
[0009] The first folding rods are paired up, with the two first folding rods in each pair arranged side by side. The inner end of each first folding rod is pivotally connected to the first support rod, and the outer end of each first folding rod is pivotally connected to the horizontal part of the main rod. Each pair of first folding rods extends perpendicular to the horizontal part of the main rod, and each pair of first folding rods is parallel to each other.
[0010] The backrest includes two parallel back bars and a second folding bar group pivotally connected between the two back bars. The two back bars are respectively pivotally connected to the upper ends of the vertical parts of the two main bars.
[0011] The second folding rod assembly includes two second folding rods with their inner ends pivotally connected to each other and a second support rod. The outer ends of the two second folding rods are pivotally connected to the back rods on both sides, and the second support rod is parallel to the two back rods and is located between the two back rods. The lower end of the second support rod is pivotally connected to the rear end of the first support rod, and the upper end of the second support rod is connected between the two second folding rods.
[0012] When the grandstand chair frame is unfolded, the two first folding rods and the two second folding rods arranged side by side are fixed at their maximum angles. When the grandstand chair frame is folded, the two first folding rods arranged side by side approach each other and the included angle between their inner ends decreases, the distance between the main rods decreases accordingly, the two second folding rods approach each other and the included angle between their inner ends decreases accordingly, the distance between the back rods decreases accordingly, and the back rods rotate and fold towards the main rods.
[0013] Furthermore, when the grandstand chair frame is folded down, the outer ends of each first folding rod and second folding rod fold downwards, the inner ends of the two first folding rods arranged side by side are clamped on both sides of the first support rod, the two second folding rods are clamped on both sides of the second support rod, the pivot points between each back rod and the corresponding main rod and the pivot points between the first support rod and the second support rod are close to each other, and the upper end of the back rod rotates downwards until the back rod is parallel to the main rod.
[0014] Furthermore, each back bar is pivotally connected to the main bar via a back bar connector. The upper end of the vertical part of the main bar is fixedly connected to the back bar connector, and the lower end of the back bar is pivotally connected to the back bar connector. The back bar rotates forward relative to the back bar connector.
[0015] Furthermore, the backrest connector has a U-shaped groove cross-section with a single-sided opening. The bottom wall of the U-shaped groove faces the rear side of the grandstand chair frame. When the grandstand chair frame is unfolded, the backrest connector has a clearance notch on the bottom wall of the lower part of the backrest. When the grandstand chair frame is folded, the backrest rotates and folds in the direction of the main rod, and the lower end of the backrest passes through the clearance notch.
[0016] Furthermore, the back rod connector has at least three sets of through holes spaced at intervals along the height direction on both sides of the U-shaped groove. The upper end of the vertical part of the main rod is fixedly connected to the lower part of the back rod connector and fixedly connected to at least two sets of through holes. The lower end of the back rod is pivotally connected to the upper part of the back rod connector and pivotally connected to one set of through holes.
[0017] Furthermore, the upper end of the second support rod and the inner ends of the two second folding rods are pivotally connected to each other by a pivot member. The pivot member includes two T-shaped plates arranged opposite each other, forming three connecting channels. The inner ends of the two second folding rods are inserted from the left and right sides respectively and pivotally connected between the two T-shaped plates, and pivotally connected in the two connecting channels with openings facing the left and right sides. The upper end of the second support rod is inserted from below and connected between the two T-shaped plates, and connected in the connecting channel with openings facing downwards.
[0018] Furthermore, when the grandstand chair frame is unfolded, the inner end of the first folding rod is supported on the upper surface of the first support rod, and the outer end of each first folding rod is supported on the upper surface of the horizontal part of the main rod; the first folding rods are in pairs, one pair is located at the front end of the horizontal part of the main rod, and the other pair is located at the rear end of the horizontal part of the main rod and in front of the upward bending angle of the main rod.
[0019] Furthermore, the lower end of the second support rod is connected to the rear end of the first support rod via a pivot seat. The pivot seat includes a connecting sleeve and a pivot groove. The connecting sleeve is fixedly sleeved on the rear end of the first support rod, and the lower end of the second support rod is pivotally connected in the pivot groove.
[0020] Furthermore, the angle between the horizontal and vertical sections of the main rod is an arc angle.
[0021] Furthermore, the outer ends of the two second folding rods are pivotally connected to the rear sides of the back rods on both sides, and the middle of each second folding rod forms a backward-bending arc.
[0022] With the above-mentioned design, the grandstand chair frame of this invention features a first folding rod and a first support rod for support on the seating surface, and a second folding rod and a second support rod for support on the backrest. Therefore, the grandstand chair frame of this invention provides better support and greater stability when seated. When folded, the connection between the rods is simple and clear, resulting in a relatively simple structure and convenient operation during folding and unfolding. Furthermore, when folded, the backrest rod can be further folded towards the main rod, resulting in a small folded volume and easy portability. In addition, the height of the backrest of this grandstand chair frame includes not only the height of the backrest rod but also the height of the vertical portion of the main rod, resulting in a higher backrest and improved user comfort. Attached Figure Description
[0023] Figure 1 This is a diagram showing the unfolded state of the grandstand chairs.
[0024] Figure 2 A schematic diagram of the folding process of the grandstand chair frame (I).
[0025] Figure 3 Schematic diagram (II) of the folding process of the grandstand chair frame.
[0026] Figure 4Schematic diagram of the folding process of the grandstand chair frame (Part 3).
[0027] Figure 5 This is a diagram showing the folded-down state of the grandstand chair frame.
[0028] Figure 6 for Figure 4 Another perspective.
[0029] Explanation of icon numbers:
[0030] 1. Main pole; 11. Horizontal section; 12. Vertical section;
[0031] 2 First support rod; 21 Pivot seat; 211 Pivot groove; 212 Connecting sleeve;
[0032] 3. First folding rod;
[0033] 4 Back pole; 41 Back pole connector; 411 Through hole; 412 Clearance notch;
[0034] 5. Second support rod;
[0035] 6. Second folding rod;
[0036] 7. Pivot joint. Detailed Implementation
[0037] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.
[0038] See Figure 1 This utility model provides a grandstand chair frame, including a support base and a backrest that are pivotally connected to each other. The support base includes two parallel main rods 1 and a first folding rod group 3 pivotally connected between the two main rods 1. The two main rods 1 are L-shaped with their rear ends bent upwards. Each main rod 1 has a horizontal part 11 and an upwardly bent vertical part 12. The first folding rod group 3 includes four first folding rods 3 arranged perpendicular to the main rods 1 and a first support rod 2. The first support rod 2 is parallel to the two main rods 1 and is arranged between the two main rods 1. The rear end of the first support rod 2 is also bent upwards with the main rods 1 for a certain height. The first folding rods 3 are paired up. The two first folding rods 3 in each pair are arranged side by side. The inner end of each first folding rod 3 is pivotally connected to the first support rod 2, and the outer end of each first folding rod 3 is pivotally connected to the horizontal part 11 of the main rod 1. Each pair of first folding rods 3 extends perpendicular to the horizontal part 11 of the main rod 1, and each pair of first folding rods 3 is parallel to each other.
[0039] Therefore, the grandstand chair frame is supported on the seating surface by the first folding rod 3 and the first support rod 2, which provides better support stability.
[0040] Specifically, in this embodiment, when the grandstand chair frame is unfolded, the inner end of the first folding rod 3 is supported on the upper surface of the first support rod 2, and the outer end of each first folding rod 3 is supported on the upper surface of the horizontal portion 11 of the main rod 1. The first folding rods 3 are arranged in pairs, with one pair located at the front end of the horizontal portion 11 of the main rod 1, and the other pair located at the rear end of the horizontal portion 11 of the main rod 1 and in front of the upward bend angle of the main rod 1. Furthermore, in this embodiment, the angle between the horizontal portion 11 and the vertical portion 12 of the main rod 1 is an arc angle.
[0041] The backrest includes two parallel back bars 4 and a second folding rod group 6 pivotally connected between the two back bars 4. The two back bars 4 are respectively pivotally connected to the upper ends of the vertical parts 12 of the two main bars 1. The second folding rod group 6 includes two second folding rods 6 with their inner ends pivotally connected to each other and a second support rod 5. The outer ends of the two second folding rods 6 are respectively pivotally connected to the back bars 4 on both sides. The second support rod 5 is parallel to the two back bars 4 and is located in the middle of the two back bars 4. The lower end of the second support rod 5 is pivotally connected to the rear end of the first support rod 2, and the upper end of the second support rod 5 is connected between the two second folding rods 6.
[0042] Therefore, the backrest of this embodiment has a second folding rod 6 and a second support rod 5 to provide support, which can provide better support stability.
[0043] See also Figures 2-5 When the grandstand chair frame is unfolded, the two first folding rods 3 and the two second folding rods 6 arranged side by side are fixed at their maximum angles. When the grandstand chair frame is folded, the outer ends of each first folding rod 3 and second folding rod 6 are folded downwards (that is, the inner ends of each first folding rod 3 and second folding rod 6 are displaced upwards, and the outer ends are displaced downwards and retracted). The two first folding rods 3 arranged side by side approach each other and the included angle between their inner ends decreases until they are clamped on both sides of the first support rod 2. The distance between the main rods 1 decreases accordingly. The two second folding rods 6 approach each other and the included angle between their inner ends decreases until they are clamped on both sides of the second support rod 5. The distance between the back rods 4 decreases accordingly. That is, the pivot points between each back rod 4 and the corresponding main rod 1 and the pivot points between the first support rod 2 and the second support rod 6 approach each other. The upper end of the back rod 4 rotates downwards towards the main rod 1 and folds until the main rod 1 is parallel.
[0044] The aforementioned grandstand chair frame structure connects the inner ends, thus creating a linkage between the three rods. When the grandstand chair frame needs to be folded, lifting the connection point of the three rods upwards will simultaneously fold the second support rod 5 and the two second folding rods 6. Since the lower end of the second support rod 5 is pivotally connected to the upper end of the first support rod 2, and the two second folding rods 6 are pivotally connected to the two back rods 4, lifting the connection point of the three rods upwards will directly or indirectly affect each rod of the entire grandstand chair frame, and this linkage tends to fold the grandstand chair frame (e.g., the second folding rod 6 pivotally connects to the two back rods 4, causing them to move closer together, and at the same time, the two main rods 1 pivotally connected below them will also move closer together). Therefore, in this embodiment, the grandstand chair frame folds down by utilizing the connection between the second support rod 5 and the two second folding rods 6. The left and right folding of the grandstand chair frame can be achieved simply by lifting the connection between the three rods with one hand, and then the backrest 4 is rotated downwards. The folding method is simple, convenient, and quick, and can be achieved with one hand, making it easy to use. In addition, the structure of this embodiment is also relatively simple; the backrest 4 can be folded towards the main rod 1 until it is parallel to the main rod 1, making the folded volume small and convenient for users to carry.
[0045] In this embodiment, the upper end of the second support rod 5 and the inner ends of the two second folding rods 6 are pivotally connected to each other via a pivot member 7. The pivot member 7 includes two T-shaped plates arranged opposite each other, forming three connecting channels. The inner ends of the two second folding rods 6 are inserted from the left and right sides respectively and pivotally connected between the two T-shaped plates, pivotally connected in the two connecting channels with openings facing the left and right sides. The upper end of the second support rod 5 is inserted from below and connected between the two T-shaped plates, connected in the connecting channel with openings facing downwards. When folding, the user only needs to pull the pivot member 7 upwards to fold the grandstand chair frame left and right.
[0046] The lower end of the second support rod 5 is connected to the rear end of the first support rod 2 via a pivot seat 21. The pivot seat 21 includes a connecting sleeve 212 and a pivot groove 211. The connecting sleeve 212 is fixedly sleeved on the rear end of the first support rod 2, and the lower end of the second support rod 5 is pivotally connected in the pivot groove 211.
[0047] See also Figure 6 In this embodiment, each back rod 4 is pivotally connected to the main rod 1 via a back rod connector 41. The upper end of the vertical part 12 of the main rod 1 is fixedly connected to the back rod connector 41, and the lower end of the back rod 4 is pivotally connected to the back rod connector 41. The back rod 4 rotates forward relative to the back rod connector 41.
[0048] Special note: When the grandstand chair frame is folded up, the pivot points between each back rod 4 and the corresponding main rod 1 and the pivot points between the first support rod 2 and the second support rod 6 are close to each other. In this embodiment, this is specifically manifested as: the distance between each back rod connector 41 and the pivot seat 21 is close to each other, and when the grandstand chair frame is fully folded up, the two back rod connectors 41 are almost sandwiched on both sides of the pivot seat 21.
[0049] Specifically, the backrest connector 41 has a U-shaped cross-section with a single-sided opening. Three sets of through holes 411 are spaced apart along the height on both sides of the U-shaped groove. The upper end of the vertical portion 12 of the main rod 1 is fixedly connected to the lower part of the backrest connector 41 and to two sets of through holes 411. The lower end of the backrest 4 is pivotally connected to the upper part of the backrest connector 41 and to one set of through holes 411. Thus, the backrest connector 41 can simultaneously fix the main rod 1 and rotatably connect the backrest 4. In this structure, the height of the backrest includes not only the height of the backrest 4 but also the height of the vertical portion 12 of the main rod 1. The higher backrest improves user comfort.
[0050] In this embodiment, the bottom wall of the U-shaped groove of the backrest connector 41 is set towards the rear side of the grandstand chair frame. In order for the backrest 4 to rotate smoothly relative to the main rod 1, when the grandstand chair frame is unfolded, the backrest connector 41 has a clearance notch 412 on the bottom wall of the lower part of the backrest 4. When the grandstand chair frame is folded, the backrest 4 rotates and folds towards the main rod 1. During the rotation, the lower end of the backrest 4 passes through the clearance notch 412.
[0051] In this embodiment, the outer ends of the two second folding rods 6 are pivotally connected to the rear side of the back rods 4 on both sides, and the middle of each second folding rod 6 forms a backward-bending arc, which can better fit the human body's leaning and improve the comfort of the backrest.
[0052] The above is merely one embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A grandstand chair frame, characterized in that, Includes the pivotally connected support base and the backrest; The support base includes two parallel main rods and a first folding rod group pivotally connected between the two main rods. The two main rods are L-shaped with their rear ends bent upwards. Each main rod has a horizontal part and an upwardly bent vertical part. The first folding rod group includes four vertical main rods and a first support rod. The first support rod is parallel to the two main rods and is located between the two main rods. The rear end of the first support rod also bends upwards with the main rods for a certain height. The first folding rods are paired up, with the two first folding rods in each pair arranged side by side. The inner end of each first folding rod is pivotally connected to the first support rod, and the outer end of each first folding rod is pivotally connected to the horizontal part of the main rod. Each pair of first folding rods extends perpendicular to the horizontal part of the main rod, and each pair of first folding rods is parallel to each other. The backrest includes two parallel back bars and a second folding bar group pivotally connected between the two back bars. The two back bars are respectively pivotally connected to the upper ends of the vertical parts of the two main bars. The second folding rod assembly includes two second folding rods with their inner ends pivotally connected to each other and a second support rod. The outer ends of the two second folding rods are pivotally connected to the back rods on both sides, and the second support rod is parallel to the two back rods and is located between the two back rods. The lower end of the second support rod is pivotally connected to the rear end of the first support rod, and the upper end of the second support rod is connected between the two second folding rods. When the grandstand chair frame is unfolded, the two first folding rods and the two second folding rods arranged side by side are fixed at their maximum angles. When the grandstand chair frame is folded, the two first folding rods arranged side by side approach each other and the included angle between their inner ends decreases, and the distance between the main rods decreases accordingly. The two second folding rods approach each other and the included angle between their inner ends decreases, and the distance between the back rods decreases accordingly. The back rods rotate and fold towards the main rods.
2. The grandstand chair frame according to claim 1, characterized in that, When the grandstand chair frame is folded down, the outer ends of each first folding rod and second folding rod fold downwards, the inner ends of the two first folding rods arranged side by side are clamped on both sides of the first support rod, and the two second folding rods are clamped on both sides of the second support rod. The pivot points between each back rod and the corresponding main rod and the pivot points between the first support rod and the second support rod are close to each other, and the upper end of the back rod rotates downwards until the back rod is parallel to the main rod.
3. A grandstand chair frame according to claim 1 or 2, characterized in that, Each back pole is pivotally connected to the main pole via a back pole connector. The upper end of the vertical part of the main pole is fixedly connected to the back pole connector, and the lower end of the back pole is pivotally connected to the back pole connector. The back pole rotates forward relative to the back pole connector.
4. A grandstand chair frame according to claim 3, characterized in that, The backrest connector has a U-shaped groove cross-section with a single-sided opening. The bottom wall of the U-shaped groove faces the rear side of the grandstand chair frame. When the grandstand chair frame is unfolded, the backrest connector has a clearance notch on the bottom wall of the lower part of the backrest. When the grandstand chair frame is folded, the backrest rotates and folds in the direction of the main rod, and the lower end of the backrest passes through the clearance notch.
5. A grandstand chair frame according to claim 3, characterized in that, The back rod connector has at least three sets of through holes spaced at intervals along the height direction on both sides of the U-shaped groove. The upper end of the vertical part of the main rod is fixedly connected to the lower part of the back rod connector and is fixedly connected to at least two sets of through holes. The lower end of the back rod is pivotally connected to the upper part of the back rod connector and is pivotally connected to one set of through holes.
6. A grandstand chair frame according to claim 1 or 2, characterized in that, The upper end of the second support rod and the inner ends of the two second folding rods are pivotally connected to each other by a pivot member. The pivot member includes two T-shaped plates arranged opposite each other to form three connecting channels. The inner ends of the two second folding rods are inserted from the left and right sides respectively and pivotally connected between the two T-shaped plates, and pivotally connected in the two connecting channels with the openings facing the left and right sides. The upper end of the second support rod is inserted from below and connected between the two T-shaped plates, and connected in the connecting channel with the opening facing downward.
7. A grandstand chair frame according to claim 1 or 2, characterized in that, When the grandstand chair frame is unfolded, the inner end of the first folding rod is supported on the upper surface of the first support rod, and the outer end of each first folding rod is supported on the upper surface of the horizontal part of the main rod; the first folding rods are in pairs, one pair is located at the front end of the horizontal part of the main rod, and the other pair is located at the rear end of the horizontal part of the main rod and in front of the upward bending angle of the main rod.
8. A grandstand chair frame according to claim 1 or 2, characterized in that, The lower end of the second support rod is connected to the rear end of the first support rod via a pivot seat. The pivot seat includes a connecting sleeve and a pivot groove. The connecting sleeve is fixedly sleeved on the rear end of the first support rod, and the lower end of the second support rod is pivotally connected in the pivot groove.
9. A grandstand chair frame according to claim 1 or 2, characterized in that, The angle between the horizontal and vertical sections of the main rod is an arc angle.
10. A grandstand chair frame according to claim 1 or 2, characterized in that, The outer ends of the two second folding rods are pivotally connected to the rear sides of the back rods on both sides, and the middle of each second folding rod forms a backward-bending arc.