A chair with a folding back

Abstract

The utility model discloses a back folding chair, including back, seat board and located seat board both sides' handrail, back is connected with the hinge connection of seat board or handrail, makes back swing to seat board and realizes folding, still include locking assembly, locking assembly includes bolt part and unlocking part, back rear part is provided with locking ring, and bolt part end portion movably penetrates locking ring and forms spacing locking, and unlocking part includes stroke groove, and unlocking part can drive bolt part along stroke groove and move horizontally or vertically, and with locking ring is separated, makes bolt part and locking ring remove spacing locking. The utility model discloses convenient to use, and back can fold to reduce the height of chair, and the space utilization is high, and the locking structure for controlling folding hides in chair frame, and the volume is smaller, does not influence the aesthetic degree of chair, and the operation is convenient, and just need to press down unlocking part to can complete folding operation to back.

Description

Technical Field

[0001] This utility model belongs to the field of chair technology, specifically relating to a chair with a foldable backrest. Background Technology

[0002] As people's living standards improve, their requirements for the quality and functionality of furniture are also increasing. Folding chairs are favored by consumers because of their portability, small space occupation, and convenient storage. In the existing folding chairs, most of them use two hinge rods that cross each other on both sides of the backrest to fold and close by squeezing the sides of the backrest. Their structures are all the same, and the backrest can only be folded horizontally without reducing the height. In addition, the folding parts are relatively large, which affects the aesthetics of the chair.

[0003] A chair with a folding backrest, disclosed in announcement number CN208550555U, includes a folding backrest unit comprising a back support, a back frame, and a snap-fit ​​folding mechanism. The back support connects the back frame and the seat cushion, and the back frame is rotatably connected to the back support and can fold forward along the back support. The snap-fit ​​folding mechanism is located at the lower rear end of the back frame and connects to the back support. This chair with a folding backrest has a pre-installed snap-fit ​​mechanism, which can be unlocked during transport to fold the backrest close to the seat, saving space and increasing packing capacity. During normal use, the user simply rotates the backrest in the opposite direction to automatically lock the snap-fit ​​mechanism, unfolding the chair backrest – very convenient. However, the snap-fit ​​folding mechanism still occupies a relatively large volume, and most of it is exposed, affecting the overall aesthetics of the chair. Utility Model Content

[0004] To address the aforementioned issues, this utility model aims to provide a chair with a foldable backrest, which is convenient to use. The backrest can be folded to reduce the height of the chair, resulting in high space utilization. The locking structure used to control the folding is hidden in the chair frame and is small in size, easy to operate, and does not affect the aesthetics of the chair.

[0005] The technical problem solved by this utility model can be achieved by the following technical solution: a chair with a foldable backrest, including a backrest, a seat, and armrests on both sides of the seat. The backrest is hinged to the seat or armrests, so that the backrest can swing towards the seat to achieve folding. It also includes a locking assembly, which includes a pin and an unlocking part. A locking ring is provided on the back of the chair. The end of the pin can movably pass through the locking ring to form a limiting lock. The unlocking part includes a travel groove. The unlocking part can drive the pin to move horizontally or vertically along the travel groove and disengage from the locking ring, so that the pin and the locking ring are released from the limiting lock.

[0006] The latch includes a cavity, which includes a beveled portion; the unlocking part also includes a connecting shaft that passes through the cavity. When the unlocking part moves, it drives the connecting shaft to move, causing the connecting shaft to abut against the beveled portion, thereby moving the latch.

[0007] The locking assembly also includes a reset component, which is installed in conjunction with the latch and the unlocking component.

[0008] It also includes a mounting sleeve, in which the locking component is installed.

[0009] A connecting rod is provided between the handrails on both sides. The connecting rod is provided with a mounting cavity and a locking ring groove. The locking ring groove is connected to the mounting cavity. The mounting sleeve is located in the mounting cavity. The locking ring enters and exits the mounting cavity through the locking ring groove.

[0010] The mounting sleeve includes a sliding groove and a sliding part. The sliding groove is installed in conjunction with the pin part, and the pin part slides along the sliding groove. The sliding part is installed in conjunction with the unlocking part, and the sliding part slides along the travel groove.

[0011] The reset component uses a spring.

[0012] Compared with the prior art, this utility model has the following advantages: it is easy to use, the backrest can be folded to reduce the height of the chair, the space utilization rate is high, the locking structure used to control the folding is hidden in the chair frame and is small in size, which does not affect the aesthetics of the chair. It is easy to operate, and the backrest can be folded by simply pressing the unlocking part. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model after folding; Figure 2 This is a schematic diagram of the unfolded structure of this utility model. Figure 1 And a magnified view of the details; Figure 3 This is a schematic diagram of the locking assembly; Figure 4 This is a schematic diagram of the unfolded structure of this utility model. Figure 2 And a magnified view of the details; Figure 5 This is a cross-sectional view of the locking component; Figure 6 This is a cross-sectional view of the mounting sleeve and locking assembly.

[0014] In the diagram: 1-backrest, 11-locking ring, 2-seat plate, 3-armrest, 31-connecting rod, 311-mounting cavity, 312-locking ring groove, 4-locking assembly, 41-pin part, 411-cavity groove, 412-sloping part, 42-unlocking part, 421-travel groove, 422-connecting shaft, 43-reset part, 5-mounting sleeve, 51-sliding groove, 52-sliding part. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0016] In the description of this utility model, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] Combined with appendix Figures 1 to 6 As shown, this embodiment discloses a chair with a foldable backrest, including a backrest 1, a seat 2, and armrests 3 located on both sides of the seat 2. The backrest 1 is hinged to the seat 2 or the armrests 3, so that the backrest 1 can swing towards the seat 2 to achieve folding. It also includes a locking assembly 4, which includes a pin part 41 and an unlocking part 42. A locking ring 11 is provided at the rear of the backrest 1. The end of the pin part 41 movably passes through the locking ring 11 to form a limiting lock. The unlocking part 42 includes a travel groove 421. The unlocking part 42 can drive the pin part 41 to move horizontally or vertically along the travel groove 421 and disengage from the locking ring 11, so that the pin part 41 and the locking ring 11 are released from the limiting lock.

[0018] In conjunction with the above, in this embodiment, the armrest 3 also includes a support leg, an armrest body, and a connecting rod. The seat 2 is fixedly installed on the connecting rod of the armrests 3 on both sides. The rear of the seat 2 extends upward and is hinged to the lower part of the backrest 1. In other embodiments, the seat 2 can also be fixedly installed to the inside of the support leg, and the backrest 1 can also be hinged to the inside of the support leg.

[0019] In this embodiment, a connecting rod 31 is provided between the handrails 3 on both sides. The connecting rod 31 and the handrails 3 on both sides are integrally formed. In other embodiments, they can also be integrally formed. The connecting rod 31 is provided with a mounting cavity 311 and a locking ring groove 312. The locking ring groove 312 is connected to the mounting cavity 311. The locking ring 11 enters and exits the mounting cavity 311 through the locking ring groove 312. The locking component 4 is located in the mounting cavity 311.

[0020] In this embodiment, the pin 41 is located above the unlocking part 42. The pin 41 moves laterally in the horizontal direction, and the unlocking part 42 moves longitudinally in the vertical direction. The locking ring 11 includes two locking rods and a receiving rod for connecting the locking rods. The two locking rods are arranged vertically. In other embodiments, the orientation of each component of the locking assembly 4 can be adjusted accordingly. For example, the pin 41 can be set to move longitudinally, the unlocking part 42 can be set to move horizontally, and the two locking rods can be arranged horizontally. That is, the pin 41 forms or releases the limiting lock with the locking ring 11 through longitudinal movement. For the convenience of further explanation of the structure of this utility model, the following orientation relationship is attached. Figures 1 to 6 The positional relationships shown are the standard; in actual use, the positional relationships shown on site shall prevail.

[0021] In conjunction with the above, the pin part 41 includes a locking part for engaging with the locking ring 11 for limiting and locking, and a pin rod body. In this embodiment, the locking part is fan-shaped. In other preferred embodiments, the locking part may also adopt shapes commonly found in the prior art, such as cylindrical, conical, and spherical shapes.

[0022] In conjunction with the above, the latch part 41 includes a cavity 411, which includes a beveled portion 412. The beveled portion 412 is inclined upward along the direction of the latch part 411. The unlocking part 42 also includes a connecting shaft 422, which passes through the cavity 411. When the unlocking part 42 moves, it drives the connecting shaft 422 to move, causing the connecting shaft 422 to abut against the beveled portion 412, thereby moving the latch part 41. Specifically, pushing the moving part 42 upward causes the connecting shaft 422 to move upward and abut against the beveled portion 412. Since the connecting shaft 422 does not move along the beveled portion 412 but continues to move upward, the beveled portion 412 moves in the direction of relative extension of the latch part 41, thereby releasing the latch part 41 from the locking ring 11. At this time, the backrest 1 can be swung, causing the locking ring 11 to leave along the locking ring groove 312, thus realizing the folding of the backrest 1.

[0023] In conjunction with the above, the locking assembly 4 also includes a reset member 43. The reset member 43 is installed in cooperation with the pin part 41 and the unlocking part 42. Preferably, in this embodiment, there are two reset members 43. The reset members 43 are springs. The rear part of the pin part 41 and the bottom inner side of the unlocking part 42 are provided with bosses. One end of the reset member 43 is installed in cooperation with the bosses so that when the backrest 1 is folded, the pin part 41 and the unlocking part 42 are reset.

[0024] In conjunction with the above, it also includes a mounting sleeve 5, a locking assembly 4 installed inside the mounting sleeve 5, the mounting sleeve 5 being located inside the mounting cavity 311, and the mounting sleeve 5 being fixedly installed with the connecting rod 31.

[0025] In conjunction with the above installation structure, the mounting sleeve 5 includes a sliding groove 51 and a sliding part 52. The sliding groove 51 is installed in conjunction with the pin part 41, and the pin part 41 slides along the sliding groove 51. The sliding part 52 is installed in conjunction with the unlocking part 42, and the sliding part 52 slides along the travel groove 421, providing guidance for the movement of the pin part 41 and the unlocking part 42, making the movement of the pin part 41 and the unlocking part 42 more stable and smooth.

[0026] This utility model is easy to use. The backrest can be folded to reduce the height of the chair, which makes high space utilization. The locking structure used to control the folding is hidden in the chair frame and is small in size, so it does not affect the aesthetics of the chair. It is easy to operate. Just press the unlocking part to complete the folding operation of the backrest.

[0027] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the utility model. Any simple modifications, equivalent changes, or alterations made to the above embodiments based on the technical principles of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A chair with a foldable backrest, comprising a backrest (1), a seat (2), and armrests (3) located on both sides of the seat (2), characterized in that: The backrest (1) is hinged to the seat (2) or armrest (3), so that the backrest (1) can swing towards the seat (2) to achieve folding; it also includes a locking assembly (4), which includes a pin (41) and an unlocking part (42). A locking ring (11) is provided at the rear of the backrest (1). The end of the pin (41) can movably pass through the locking ring (11) to form a limiting lock. The unlocking part (42) includes a travel groove (421). The unlocking part (42) can drive the pin (41) to move horizontally or vertically along the travel groove (421) and disengage from the locking ring (11), so that the pin (41) and the locking ring (11) are released from the limiting lock.

2. A chair with a foldable backrest according to claim 1, characterized in that: The pin part (41) includes a cavity (411), the cavity (411) includes a beveled part (412); the unlocking part (42) also includes a connecting shaft (422), the connecting shaft (422) passes through the cavity (411), when the unlocking part (42) moves, it drives the connecting shaft (422) to move, so that the connecting shaft (422) abuts against the beveled part (412), and the pin part (41) moves.

3. A chair with a foldable backrest according to claim 2, characterized in that: The locking assembly (4) also includes a reset member (43), which is installed in conjunction with the pin portion (41) and the unlocking portion (42).

4. A chair with a foldable backrest according to claim 3, characterized in that: It also includes a mounting sleeve (5), and a locking component (4) is installed inside the mounting sleeve (5).

5. A chair with a foldable backrest according to claim 4, characterized in that: A connecting rod (31) is provided between the handrails (3) on both sides. The connecting rod (31) is provided with a mounting cavity (311) and a locking ring groove (312). The locking ring groove (312) is connected to the mounting cavity (311). The mounting sleeve (5) is located in the mounting cavity (311). The locking ring (11) enters and exits the mounting cavity (311) through the locking ring groove (312).

6. A chair with a foldable backrest according to claim 4, characterized in that: The mounting sleeve (5) includes a sliding groove (51) and a sliding part (52). The sliding groove (51) is installed in conjunction with the pin part (41), and the pin part (41) slides along the sliding groove (51). The sliding part (52) is installed in conjunction with the unlocking part (42), and the sliding part (52) slides along the travel groove (421).

7. A chair with a foldable backrest according to claim 3, characterized in that: The reset element (43) is a spring.

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