Chair with rotatable and foldable backrest

Abstract

The utility model relates to the technical field of furniture production, in particular to a chair with a rotatable and foldable backrest, which comprises a seat plate, a backup plate, sliding rods I, fixing blocks I, sliding rods II and limiting rods, the back part of the seat plate is connected with the backup plate in a sliding manner, the left side and the right side of the seat plate are connected with the sliding rods I, the sliding rods I are connected with the fixing blocks I in a sliding manner, and the limiting rods are connected with the sliding rods II in a sliding manner. The rear portions of the fixing blocks I are connected with sliding rods II, and limiting rods are jointly connected between the sliding rods II in a sliding mode. By installing the fixing block I, the sliding rod II and the limiting rod, when the fixing block I 4 moves backwards to the rearmost end of the sliding rod I 3, and the limiting rod 6 is located at the lowermost end of the sliding rod II 5, the backup plate 2 and the seat plate 1 are located on the same horizontal line, so that the backup plate 2 is unfolded, the available area of the device is enlarged, and the device can be used by more people; in addition, the device in the unfolded state can serve as a bed for a user to have a rest, and the utilization rate of the device is increased.

Description

Technical Field

[0001] This utility model relates to the field of furniture manufacturing technology, and more specifically, to a chair with a rotatable and foldable backrest. Background Technology

[0002] A chair is a piece of everyday furniture, a seat with a backrest and armrests. Modern chairs pursue aesthetics and fashion, and some chairs are no longer just seating but have incorporated more technology to make them more convenient for people.

[0003] To facilitate chair storage and meet people's needs in different scenarios, many foldable chairs have appeared on the market. However, most of these foldable chairs are designed to be compact, which to some extent limits their application in situations where more spacious seating is required. Although a few foldable chairs with larger sizes have appeared on the market, the armrests of these chairs are often not adjustable, causing inconvenience to users in actual use and affecting the overall user experience.

[0004] Therefore, we urgently need a chair with a rotatable and foldable backrest. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a chair with a rotatable and foldable backrest.

[0006] The technical solution is as follows: A chair with a rotatable and foldable backrest includes a seat, a backrest, a slide rod I, a fixing block I, a slide rod II, a limiting rod, a mounting block, support legs, and armrests. The backrest is slidably connected to the rear of the seat. Slide rods I are connected to both the left and right sides of the seat. Fixing blocks I are slidably connected to slide rods I. Slide rods II are connected to the rear of fixing blocks I. Limiting rods are slidably connected to slide rods II. The limiting rods pass through the backrest and are slidably connected to the backrest. Mounting blocks are connected to the backrest. Support legs are rotatably connected to the middle of the mounting blocks. Armrests are connected to both the left and right sides of the seat.

[0007] Optionally, it also includes a fixed block II, a locking block, a connecting rod, and an elastic element I. Fixed blocks II are connected to both the left and right sides of the seat plate. A square groove is provided on the upper side of the fixed block II. A connecting rod is slidably connected to the fixed block II. Locking blocks are connected to both ends of the upper part of the connecting rod. The locking blocks pass through the square groove on the fixed block II. An elastic element I is connected between the locking blocks and the fixed block II.

[0008] Optionally, it also includes a spiral spring, which is wound around and connected inside the mounting block, with the end of the spiral spring not connected to the mounting block connected to the support leg.

[0009] Optionally, it also includes a rotating plate and a top rod. The rotating plate is slidably connected to the backing plate. The end of the rotating plate that is not in contact with the backing plate is rotatably connected to the support leg. The end of the rotating plate that is slidably connected to the backing plate is connected to the top rod, which is located to the left of the limit rod.

[0010] Optionally, it also includes a limiting block I, an elastic element II, a pull rod and a slide rod III. The left and right sides of the seat plate are connected to the slide rod III. The front and rear ends of the slide rod III are slidably connected to the limiting block I. The shape of the limiting block I fits the shape of the armrest. The elastic element II is connected between the limiting block I and the slide rod III. The limiting block I is connected to the pull rod.

[0011] Optionally, it also includes a limiting block II, with the lower part of the limiting block I symmetrically connected to the limiting block II.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] This utility model, by installing a fixing block I, a sliding rod II, and a limiting rod, allows the backrest 2 and the seat plate 1 to be aligned on the same horizontal line when the fixing block I4 moves to the rear end of the sliding rod I3 and the limiting rod 6 is located at the bottom end of the sliding rod II5. This completes the unfolding of the backrest 2, expands the usable area of ​​the device, and allows more people to use the device. Furthermore, the unfolded device can also be used as a bed for users to rest, thus improving the utilization rate of the device. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a cross-sectional view of the fixing block II of this utility model.

[0016] Figure 3 This is a cross-sectional view of the backrest of this utility model.

[0017] Figure 4 This is a cross-sectional view of the limiting block I of this utility model.

[0018] Figure 5 This is a three-dimensional structural diagram of the backrest after it has been unfolded.

[0019] Figure 6 This is a three-dimensional structural diagram of the fixing block I and the limiting rod after the backing plate of this utility model is unfolded.

[0020] Explanation of reference numerals in the attached drawings: 1: Seat plate, 2: Backrest plate, 3: Slide rod I, 4: Fixing block I, 5: Slide rod II, 6: Limiting rod, 7: Fixing block II, 8: Locking block, 81: Connecting rod, 9: Elastic element I, 10: Mounting block, 11: Support leg, 12: Scroll spring, 13: Rotating plate, 14: Top rod, 15: Handrail, 16: Limiting block I, 161: Limiting block II, 162: Slide rod III, 17: Elastic element II, 18: Pull rod. Detailed Implementation

[0021] The embodiments of this utility model will be described below with reference to the accompanying drawings.

[0022] Example: A chair with a rotatable and foldable backrest, such as... Figure 1 , Figure 5 and Figure 6 As shown, the device includes a seat plate 1, a backrest 2, a sliding rod I3, a fixing block I4, a sliding rod II5, a limiting rod 6, a mounting block 10, a support leg 11, and an armrest 15. The seat plate 1 has a large area, thus accommodating multiple users simultaneously. The backrest 2, which serves as a user's backrest, is slidably connected to the rear of the seat plate 1. Sliding rods I3 are connected to both the left and right sides of the seat plate 1. Fixing blocks I4 are slidably connected to each sliding rod I3. Sliding rods II5 are connected to the rear of each fixing block I4. The sliding rods II5 are connected to the limiting rod 6, which slides up and down together. The limiting rod 6 passes through the backrest 2 and is slidably connected to the backrest 2. The mounting block 10 is connected to the backrest 2. The middle of the mounting block 10 is rotatably connected to a support leg 11 for supporting the unfolded backrest 2. Armrests 15 are provided on both the left and right sides of the seat plate 1.

[0023] like Figure 2As shown, it also includes a fixed block II7, a locking block 8, a connecting rod 81, and an elastic element I9. Fixed blocks II7 are connected to both the left and right sides of the base plate 1. A square groove is formed on the upper side of the fixed block II7. A connecting rod 81 is slidably connected to the fixed block II7, with its upper part located inside the fixed block II7. Locking blocks 8 are connected to both ends of the upper part of the connecting rod 81, protruding from the square groove on the fixed block II7. Elastic elements I9 are connected to the locking blocks 8 and the fixed block II7 via spring seats. When the backing plate 2 is to be rotated and unfolded, the connecting rod 81 is pulled down first, causing the locking blocks 8 to move downwards. The elastic element I9 is ​​compressed, making the upper side of the locking blocks 8 flush with the upper side of the fixed block II7. At this time, the fixed block I4 can move horizontally, allowing the fixed block I9 to... Fixed block I4 moves backward along slide rod I3. During this process, as slide rod II5 moves backward, limiting rod 6 will slide downward on slide rod II5. At the same time, limiting rod 6 will also slide backward inside back plate 2, thereby driving back plate 2 to rotate backward. When fixed block I4 moves to the rear end of slide rod I3, limiting rod 6 is located at the bottom end of slide rod II5. At this time, back plate 2 and seat plate 1 are on the same horizontal line. Release link 81, elastic element I9 will reset with locking block 8, and limit fixed block I4 again, thereby completing the unfolding of back plate 2, expanding the usable area of ​​the device, and thus making the device usable for more people. In addition, the device in the unfolded state can also be used as a bed for users to rest, improving the utilization rate of the device.

[0024] like Figure 3 As shown, it also includes a spiral spring 12, a rotating plate 13, and a push rod 14. The spiral spring 12 is wound around and connected inside the mounting block 10. The end of the spiral spring 12 not connected to the mounting block 10 is connected to the support leg 11. The rotating plate 13 is slidably connected to the back plate 2. The end of the rotating plate 13 not in contact with the back plate 2 is rotatably connected to the support leg 11. The end of the rotating plate 13 that is slidably connected to the back plate 2 is connected to the push rod 14. The push rod 14 is located to the left of the limiting rod 6. The end of the push rod 14 near the limiting rod 6 is provided with an arc-shaped groove that can fit with the limiting rod 6. During the process of the back plate 2 rotating backward, the limiting rod 6 will slide backward inside the back plate 2. Position rod 6 will contact top rod 14 and push top rod 14 to slide backward together. As top rod 14 moves backward, it will drive rotating plate 13 to slide backward along back plate 2. During this process, rotating plate 13 will cause support leg 11 to rotate backward around mounting block 10, thereby unfolding support leg 11. When support leg 11 rotates backward, spiral spring 12 will tighten. This allows support leg 11 to unfold synchronously during the unfolding of back plate 2, providing support and fixation for the unfolded back plate 2. This saves the step of manually unfolding support leg 11 and improves the efficiency of unfolding back plate 2. When back plate 2 needs to be folded back, the device can be reset.

[0025] like Figure 4As shown, it also includes a limiting block I16, an elastic element II17, a pull rod 18, a limiting block II161, and a sliding rod III162. Sliding rods III162 are connected to both the left and right sides of the seat plate 1. The front and rear ends of sliding rods III162 are slidably connected to limiting blocks I16. The shape of limiting blocks I16 can fit the shape of the armrest 15. Elastic elements II17 are connected between limiting blocks I16 and sliding rods III162 via spring seats. Pull rods 18 are connected to each limiting block I16. Symmetrically connected to the lower part of limiting blocks I16 are… When the handrail 15 is to be rotated downwards, the pull rod 18 is first pulled towards the middle of the slide rod Ⅲ162. The pull rod 18 will drive the limit block Ⅰ16 to move together. At this time, the elastic element Ⅱ17 is compressed, and the limit block Ⅰ16 no longer limits the handrail 15. Then, the handrail 15 is pressed down, and the handrail 15 will fit with the limit block Ⅱ161, which will provide support for the handrail 15. This allows the user to adjust the position of the handrail 15 according to their own needs, effectively improving the user experience.

[0026] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A chair with a rotatable and foldable backrest, comprising: Seat plate (1); The backrest (2) is slidably connected to the rear of the seat plate (1); Its characteristic is that it further includes: Slide rod I (3) is connected to the left and right sides of the seat plate (1) respectively; Fixed block I (4) is slidably connected to slide rod I (3); Slide rod II (5) is connected to the rear of the fixed block I (4); The limiting rod (6) is slidably connected between the sliding rods II (5), and the limiting rod (6) passes through the back plate (2) and is slidably connected to the back plate (2); Mounting block (10) is connected to the back plate (2); The support leg (11) is rotatably connected to the middle of the mounting block (10); Armrests (15) are connected to the left and right sides of the seat plate (1), respectively.

2. A chair with a rotatable and foldable backrest according to claim 1, characterized in that, Also includes: Fixing block II (7) is connected to the left and right sides of the base plate (1), and a square groove is provided on the upper side of the fixing block II (7); The connecting rod (81) is slidably connected to the fixed block II (7); The locking blocks (8) are respectively connected to the upper two ends of the connecting rod (81), and the locking blocks (8) pass through the square groove on the fixing block II (7); Elastic element I (9) is connected between the card block (8) and the fixed block II (7).

3. A chair with a rotatable and foldable backrest according to claim 2, characterized in that, Also includes: A spiral spring (12) is wound around and connected inside the mounting block (10), and the end of the spiral spring (12) not connected to the mounting block (10) is connected to the support leg (11).

4. A chair with a rotatable and foldable backrest according to claim 3, characterized in that, Also includes: The rotating plate (13) is slidably connected to the back plate (2), and the end of the rotating plate (13) that is not in contact with the back plate (2) is rotatably connected to the support leg (11); The top rod (14) is connected to the end of the rotating plate (13) that is slidably connected to the back plate (2), and the top rod (14) is located to the left of the limiting rod (6).

5. A chair with a rotatable and foldable backrest according to claim 4, characterized in that, Also includes: Slide rods III (162) are connected to the left and right sides of the seat plate (1); Limiting blocks I (16) are slidably connected to the front and rear ends of the slide rod III (162), and the shape of the limiting blocks I (16) fits the shape of the handrail (15); Elastic element II (17) is connected between the limiting block I (16) and the sliding rod III (162); A pull rod (18) is connected to the limiting block I (16).

6. A chair with a rotatable and foldable backrest according to claim 5, characterized in that, Also includes: Limiting block II (161) is symmetrically connected to the lower part of limiting block I (16).

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