Seat and child dining chair with same

Abstract

The utility model relates to a seat and a child dining chair with the same, and belongs to the technical field of folding chairs. The seat comprises a seat plate and a back plate, the back plate and the seat plate are provided with a back plate locking structure, the seat plate is provided with limiting protrusions in a protruding mode, the back plate is located between the two limiting protrusions, the back plate is rotationally connected with the limiting protrusions, the back plate locking structure comprises a second locking column, a second elastic plastic strip, a second operation plate and a reset structure, and the second operation plate is installed on the back plate in a sliding mode. One ends of the two second elastic plastic strips are connected with the second operation plate, the other ends of the two second elastic plastic strips are connected with the two second locking columns in a one-to-one correspondence mode, the second locking columns are installed on the back plate in a sliding mode, and one ends of the second locking columns protrude out of the side wall of the back plate in a sliding mode; the reset structure elastically keeps one end of the second locking column protruding out of the side wall of the back plate, and the limiting protrusion is provided with at least two gear holes allowing the second locking column to be inserted therein. The seat disclosed by the utility model has the effect of being conveniently folded and stored at any gear.

Description

Technical Field

[0001] This application relates to the field of folding chairs, and in particular to a children's dining chair. Background Technology

[0002] High chairs, as special seats for infants and toddlers during meals, are mostly designed with a folding function to meet the needs of efficient use of family space and easy portability. Currently, the folding structure of folding high chairs on the market usually consists of multiple parts, which require a complex linkage mechanism to achieve the folding and unfolding function, increasing the difficulty and inconvenience of use.

[0003] To address the above problems, the inventors proposed a novel folding structure for dining chairs. Utility Model Content

[0004] Firstly, in order to better adjust the angle of the seat back and facilitate storage, this application provides a seat.

[0005] The seat provided in this application adopts the following technical solution:

[0006] A seat includes a seat and a backrest. One side of the backrest is rotatably connected to one side of the seat and is provided with a backrest locking structure to maintain the backrest in an unfolded state. Limiting protrusions protrude from both sides of the seat. The backrest is located between two of the limiting protrusions and is rotatably connected to the limiting protrusions. The backrest locking structure includes a second locking post, a second elastic plastic strip, a second operating plate, and a reset structure. The second operating plate is slidably mounted on the backrest. There are two second elastic plastic strips and two second locking posts. One end of each of the two second elastic plastic strips is connected to the second operating plate, and the other end corresponds to and is connected to the two second locking posts. The second locking posts are slidably mounted on the backrest, and one end of each second locking post slidably protrudes from the side wall of the backrest. The reset structure elastically maintains one end of the second locking post protruding from the side wall of the backrest. The limiting protrusions have at least two positioning holes for the second locking post to be inserted.

[0007] By adopting the above technical solution, the back panel locking structure allows the second locking pin to slide by pulling the second operating plate with one hand while holding the back panel. The second locking pin disengages from the locking hole, thus unlocking the back panel and seat. This unlocking method is simple and effortless. Furthermore, the back panel and seat can be stored by disengaging from the locking hole at different positions. The reset structure allows the second locking pin to automatically reset after the second operating plate is slid and released. Additionally, when stored, the back panel and seat fold together, taking up less space.

[0008] Optionally, the limiting protrusion has a locking groove for the second locking pin to slide, and the stop hole is opened at the bottom of the locking groove.

[0009] By adopting the above technical solution, when the end of the second locking pin is disengaged from the gear hole and is in the locking groove, the back plate angle gear can be changed without being unfurled. The existence of the locking groove also makes the shifting of the edge gear smoother.

[0010] Optionally, the second operating plate extends along the sliding direction and is provided with a sliding protrusion. The sliding protrusion has a first stroke hole along the sliding direction. The first stroke hole is an oblong hole. The back plate protrudes and is provided with a first stroke post that slides within the first stroke hole. The first stroke post is threaded with a screw that restricts the sliding protrusion from disengaging from the back plate. When the second operating plate drives the sliding protrusion to unlock and slide to the stroke limit of the first stroke hole, the second locking post disengages from the gear hole.

[0011] By adopting the above technical solution, the sliding stroke of the second operating plate is limited, so that the second operating plate will not slide to the point where the locking pin completely disengages and fails or the second elastic plastic strip breaks.

[0012] Optionally, the back plate is also slidably mounted with a gear adjustment locking block. The side wall of the second operating plate is provided with a second stroke hole for the gear adjustment locking block to slide into. When the second operating plate is unlocked and slid to the stroke limit of the second stroke hole, the second locking pin disengages from the gear hole and its end is located in the locking groove. When the second operating plate drives the sliding protrusion to unlock and slide to the stroke limit of the first stroke hole, the second locking pin disengages from the locking groove.

[0013] By adopting the above technical solution, the operation function of the second control panel can be unlocked by sliding the gear adjustment locking block. The second control panel can switch between the gear shifting function and the function of unlocking the back panel for storage. The second control panel can be locked in the gear shifting state, thereby locking the unfolded state of the dining chair.

[0014] Optionally, the back of the back plate is further provided with a second elastic reset groove for mounting the second elastic plastic strip. One end of the two second elastic plastic strips is connected to the second operating plate, and the other end extends toward the two limiting protrusions in a figure-eight shape. The reset structure is formed between the second elastic plastic strip and the second elastic reset groove.

[0015] By adopting the above technical solution, the second elastic plastic strip is restricted by the groove wall of the second elastic reset slide. After the second operating plate slides and is released, the second elastic plastic strip tends to return to its original state, thereby realizing the function of the reset structure. The reset structure is simple and effectively utilizes the connection structure between the second operating plate and the second locking post, and at the same time realizes the functions of connection, reset and restriction of the sliding direction of the second locking post.

[0016] Optionally, the reset structure further includes a reset spring, which is installed between the back plate and the second operating plate and provides an elastic reset force to the second operating plate.

[0017] By adopting the above technical solution, the reset capability of the second operating plate is improved by using a reset spring.

[0018] Optionally, the seat further includes armrests and armrest supports. There are two armrests, which are located on both sides. One end of each armrest is rotatably connected to the backrest. There are two armrest supports, which correspond one-to-one with the two armrests. One end of each armrest support is rotatably connected to the seat, and the other end is rotatably connected to the armrest. The armrests, armrest supports, backrest, and seat form a parallelogram structure.

[0019] By adopting the above technical solution, the armrests and armrest supports can also be rotated and stored. The armrests, armrest supports, back panel and seat form a parallelogram. When the back panel is unfolded or folded relative to the seat, the armrests and armrest supports are also unfolded or folded together, which is more convenient.

[0020] Secondly, in conjunction with the aforementioned chair, this application also provides a children's dining chair.

[0021] The technical solution adopted in this application for a children's dining chair is as follows:

[0022] A children's high chair includes a frame and a seat as described above. There are two frames, which are respectively located on both sides of the seat. Each frame includes two legs, the upper ends of which are rotatably connected and provided with a travel limit structure. When the two legs are extended to the end of their travel, they form an inverted V shape. The seat is rotatably connected to one of the legs of each frame and is provided with a seat locking structure to keep the seat in the extended state. When the seat is in the folded state, the back panel is rotatably connected to the seat above the seat, and the back panel is folded downwards with the seat to form a folded state.

[0023] By adopting the above technical solution, when opening, the two legs of the two supports can be separated first, then the seat can be rotated to lock the seat in place by the seat locking structure, then the back panel can be rotated to lock the back panel in place by the back panel locking structure, and finally the tray can be placed to complete the unfolding of the high chair. When folding the high chair, the back panel and seat can be unlocked in sequence to complete the folding of the back panel and seat. Then, the high chair can be lifted to fold the two legs of each of the two supports into a close-fitting state. The entire folding process can be completed with one hand, and the folding process is simple. At the same time, after folding, the back panel and seat take up less space. The folded back panel and seat occupy the space between the two supports. The entire high chair is in a flat state after folding, taking up very little space. At the same time, since children are small, the seat only needs to be connected to one leg of the support for support, and the locking ability of the corresponding seat locking structure is also sufficient.

[0024] Optionally, the seat locking structure includes a first locking post, a first elastic plastic strip, and a first operating plate. A first sliding groove is provided on the back of the seat for the first operating plate to slide and install. There are two first elastic plastic strips, one end of which is fixed to one end of the first operating plate in the sliding direction. The other ends of the two first elastic plastic strips extend in a figure-eight shape towards the two support legs rotatably connected to the seat. A first elastic reset sliding groove is also provided on the back of the seat for the first elastic plastic strip to install. There are two first locking posts, which are slidably installed on the back of the seat, and each first locking post corresponds to one of the two first elastic plastic strips. One end of each first locking post is connected to the end of the first elastic plastic strip away from the first operating plate, and the other end slides out of the side wall of the seat. The support legs have locking holes for the first locking posts to be inserted, and the locking holes correspond to the unfolded state of the seat.

[0025] By adopting the above technical solution, the seat locking structure allows the first operating plate to be pulled by the fingers of the seat plate with one hand. The first locking pin is moved by the first elastic plastic strip and the locking pin is disengaged from the locking hole to complete the unlocking. Unlocking is simple and effortless. The first elastic plastic strip is restricted by the groove wall of the first elastic reset slide, and the first operating plate can be automatically reset after being released.

[0026] Optionally, the side wall of the support leg is provided with a travel protrusion, and the seat plate is provided with a travel arc groove for the travel protrusion to slide. When the two ends of the travel protrusion in the travel arc groove are at their travel limits, they correspond to the seat plate being in an unfolded state and a retracted state, respectively.

[0027] By adopting the above technical solution, the seat will not leave the range of rotation when it is folded up. When folded up, the seat will remain stable under the action of gravity, while maintaining smooth one-handed operation. When unfolded, there is no need to unlock it. The seat can be unfolded by grabbing the back panel and flipping it upwards. When the seat is unfolded, it is easy to position the first locking pin into the locking hole. When the seat is unfolded and rotated to the limit of its stroke, the first locking pin is aligned with the locking hole.

[0028] Optionally, the bracket further includes a rotating disk, the seat plate is rotatably connected to the rotating disk, and the rotating disk is slidably connected to the support legs and is provided with a sliding locking structure.

[0029] By adopting the above technical solution, the height of the seat can be adjusted, and the presence of the rotating disc as an intermediate component facilitates the setting of the sliding locking structure and locking hole.

[0030] In summary, the back panel locking structure allows the user to unlock the back panel by pulling the second control panel with one hand, which in turn moves the second locking pin through the second elastic plastic strip. Once the second locking pin disengages from the locking hole, the back panel is unlocked. This unlocking method is simple and effortless. Furthermore, the back panel and seat can be stored by disengaging the second locking pin from the locking hole at different positions. The reset structure ensures that the second locking pin automatically resets after the second control panel is slid and released. Additionally, when stored, the back panel and seat fold together, taking up less space. Attached Figure Description

[0031] Figure 1 This is a structural schematic diagram of the seat in the embodiments of this application;

[0032] Figure 2 This is a schematic diagram of the structure of the back of the seat in an embodiment of this application;

[0033] Figure 3 This is a schematic diagram of the structure of the first operation panel in the embodiments of this application;

[0034] Figure 4 This is a schematic diagram of the structure of the back side of the back plate in the embodiments of this application;

[0035] Figure 5 This is a structural schematic diagram of the front of the seat in an embodiment of this application;

[0036] Figure 6 This is a schematic diagram of the backplate locking structure in the embodiments of this application;

[0037] Figure 7 This is a partial structural schematic diagram of the back plate in an embodiment of this application;

[0038] Figure 8 This is a structural schematic diagram of the seat in its stowed state according to an embodiment of this application;

[0039] Figure 9 This is an exploded view of the rotating connection structure at the end of the bracket in the embodiment of this application;

[0040] Figure 10 This is a schematic diagram of the structure of the bracket in the embodiments of this application;

[0041] Figure 11 This is a schematic diagram of the unfolded structure of the children's high chair in the embodiments of this application;

[0042] Figure 12 This is a structural schematic diagram of the child high chair backrest in the storage state in an embodiment of this application;

[0043] Figure 13 This is a structural schematic diagram of the child high chair in its stowed state according to an embodiment of this application;

[0044] Figure 14 This is a structural schematic diagram of the children's high chair in its folded state according to an embodiment of this application;

[0045] Figure 15 This is a complete structural diagram of the unfolded state of the children's high chair in the embodiments of this application;

[0046] Figure 16 This is a schematic diagram of the installation structure of the handrail in the embodiments of this application;

[0047] Figure 17 This is a partial structural schematic diagram of the serving board in an embodiment of this application.

[0048] Explanation of reference numerals in the attached drawings: 1. Bracket; 11. Support leg; 12. Rotating disc; 121. Locking hole; 122. Stroke protrusion; 13. Rotating round shell; 14. Rotating round block; 141. Stroke groove; 15. Stroke disc; 151. Buckle; 2. Seat; 21. Seat plate; 211. First slide groove; 212. First elastic return slide groove; 213. Disengagement block; 214. Stroke arc groove; 215. Limiting protrusion; 216. Locking groove; 217. Gear hole; 22. Back panel; 221. Second slide groove; 222. Second elastic return slide groove; 223. First stroke column; 23. Armrest; 231. Placement 24. Armrest support rod; 3. Tabletop; 31. Slide block; 32. Mounting slide; 33. Embedded block; 4. U-shaped base frame; 5. Anti-slip pad block; 6. Seat locking structure; 61. First locking post; 62. First elastic plastic strip; 63. First operating panel; 7. Back panel locking structure; 71. Second locking post; 72. Second elastic plastic strip; 73. Second operating panel; 74. Sliding protrusion; 75. First stroke hole; 76. Second stroke hole; 8. Gear adjustment locking block; 81. Wave protrusion; 9. Return spring; 91. Spring post; 92. First spring groove; 93. Second spring groove; 94. Spring plate. Detailed Implementation

[0049] The following is in conjunction with the appendix Figure 1-17 This application will be described in further detail.

[0050] This application discloses a children's dining chair.

[0051] Reference Figure 1 A children's dining chair includes a seat 2, which includes a seat 21, a backrest 22, armrests 23 and armrest support rods 24. The front side of the seat 21 is rotatably connected to two rotating discs 12 and is provided with a seat locking structure 6 to keep the seat 21 in an unfolded state. The lower side of the backrest 22 is rotatably connected to the rear side of the seat 21 and is provided with a backrest locking structure 7 to keep the backrest 22 in an unfolded state.

[0052] Refer to 2. Figure 3 and Figure 10 The seat locking structure 6 specifically includes a first locking post 61, a first elastic plastic strip 62, and a first operating plate 63. A first sliding groove 211 for sliding the first operating plate 63 is provided on the back of the seat 21. Two brackets 1 are respectively located on both sides of the sliding direction of the first operating plate 63, and the first sliding groove 211 is close to and passes through the rear of the seat 21. During operation, the first operating plate 63 can be operated from the rear of the chair. Simultaneously, the rotating disc 12 is installed on the support leg 11, which is farther from the backrest 22, i.e., the front support leg 11. There are two first elastic plastic strips 62. One end of each first elastic plastic strip 62 is fixed to the front end of the first operating plate 63 along the sliding direction, and the other end of each first elastic plastic strip 62 faces... The seat plate 21 extends outward in a figure-eight shape from the front. The back of the seat plate 21 is provided with a first elastic reset groove 212 for the installation of the first elastic plastic strip 62. A release limiting block 213 is also suspended from the back of the seat plate 21 into the first elastic reset groove 212, thereby preventing the first elastic plastic strip 62 from disengaging from the first elastic reset groove 212. The first elastic plastic strip 62 is a slender elastic plastic strip, which gives it a certain elastic deformation capability. At the same time, after the first operating plate 63 drives the first elastic plastic strip 62 to slide outward in the first elastic reset groove 212, the first elastic plastic strip 62 has the ability to elastically reset to its original state after the first operating plate 63 is released.

[0053] In this embodiment, in order to better reset the first elastic plastic strip 62, a reset spring 9 is provided between the first operating plate 63 and the seat plate 21, so that when the first operating plate 63 is released, the first operating plate 63 can reset to its original position, thereby better cooperating with the first elastic plastic strip 62 to return to its original position and better maintaining the locking and unlocking functions of the seat plate locking structure 6. The specific installation method of the reset spring 9 between the first operating plate 63 and the seat plate 21 can be as follows: the seat plate 21 has a spring plate 94 protruding from the first sliding groove 211, the first operating plate 63 has a first spring groove 92 for the spring plate 94 to slide, and the reset spring 9 is installed in the first spring groove 92. The reset spring 9 is clamped between the spring plate 94 and the groove wall at one end of the first spring groove 92 to realize the elastic reset of the first operating plate 63.

[0054] There are two first locking posts 61, which are slidably installed on the back of the seat plate 21. The two first locking posts 61 are located on both sides of the sliding direction of the first operating plate 63. The coaxial ends of the two first locking posts 61, which are far apart from each other, can slide through the side walls on both sides of the seat plate 21. The two first locking posts 61 correspond one-to-one with the two first elastic plastic strips 62. One end of the first locking post 61 is connected to the end of the first elastic plastic strip 62 that is far away from the first operating plate 63. The specific connection method can be a snap-fit. The other end of the first locking post 61 slides out of the side wall of the seat plate 21. The two rotating disks 12 are provided with locking holes 121 for the first locking posts 61 to be inserted, which correspond to the unfolded state of the seat plate 21.

[0055] Meanwhile, the side wall of the rotating disk 12 is provided with a travel protrusion 122, and the seat plate 21 is provided with a travel arc groove 214 for the travel protrusion 122 to slide. When the two ends of the travel protrusion 122 in the travel arc groove 214 are at the travel limit, they correspond to the seat plate 21 being in the unfolded state and the retracted state, respectively.

[0056] Reference Figure 4-8The seat 21 has two protruding limiting protrusions 215 on both sides of its front, with each protrusion corresponding to one of the two brackets 1. The back plate 22 is located between the two limiting protrusions 215 and is rotatably connected to them. The back plate locking structure 7 specifically includes a second locking post 71, a second elastic plastic strip 72, and a second operating plate 73. The installation method of the second operating plate 73, the second elastic plastic strip 72, and the second locking post 71 is basically the same as that of the first locking post 61, the first elastic plastic strip 62, and the first operating plate 63. The back of the back plate 22 has a second sliding groove 221 for the second operating plate 73 to slide and install. The second sliding groove 221 is located on the side of the back plate 22 away from the seat 21. 73 can move closer to and away from the seat plate 21 within the second slide groove 221. There are two second elastic plastic strips 72. One end of each second elastic plastic strip 72 is fixed to one end of the second operating plate 73 in the sliding direction. The other end of each second elastic plastic strip 72 extends toward the two limiting protrusions 215 in a figure-eight shape. The back of the back plate 22 is also provided with a second elastic reset slide groove 222 for the installation of the second elastic plastic strips 72. There are two second locking posts 71. The two second locking posts 71 are slidably installed on the back of the back plate 22, and the two second locking posts 71 correspond one-to-one with the two second elastic plastic strips 72. One end of each second locking post 71 is connected to the end of the second elastic plastic strip 72 away from the second operating plate 73, and the other end slides out of the side wall of the back plate 22.

[0057] The difference between the backplate locking structure 7 and the seat locking structure 6 is that the second operating plate 73 extends along the sliding direction and is provided with a sliding protrusion 74. The second elastic plastic strip 72 is integrally connected to the end of the sliding protrusion 74 away from the second operating plate 73. The limiting protrusion 215 has a locking groove 216 for the second locking pin 71 to be inserted and slid. The bottom of the locking groove 216 has a stop hole 217 for the second locking pin 71 to be inserted. In this embodiment, there are three stop holes 217. The sliding protrusion 74 has a first stroke hole 75 along the sliding direction. The first stroke hole 75 is an oblong hole. The backplate 22 protrudes and is provided with a first stroke pin 223 that slides in the first stroke hole 75. The first stroke pin 223 is threaded with a screw to prevent the sliding protrusion 74 from disengaging from the backplate 22. In this embodiment, the first stroke hole 75 and the first stroke pin 22 are... 3. The device is equipped with two sets of upper and lower components. When the second operating plate 73 drives the sliding protrusion 74 to unlock and slide to the travel limit of the first travel hole 75, the second locking pin 71 disengages from the locking groove 216. The back plate 22 is also slidably installed with a gear adjustment locking block 8. The gear adjustment locking block 8 is located on one side of the sliding direction of the second operating plate 73. The side wall of the second operating plate 73 has a second travel hole 76 for the gear adjustment locking block 8 to slide into. When the second operating plate 73 unlocks and slides to the travel limit of the second travel hole 76, the second locking pin 71 disengages from the gear hole 217, but its end is still in the locking groove 216. That is, the sliding limit of the second travel hole 76 has not reached the sliding limit of the first travel hole 75. At the same time, the gear adjustment locking block 8 is provided with a wavy protrusion 81 to facilitate the wavy operation of the gear adjustment locking block 8 during unlocking.

[0058] A return spring 9 is also installed between the second operating plate 73 and the back plate 22, so that the second operating plate 73 can be reset better. The specific installation method of the return spring 9 between the second operating plate 73 and the back plate 22 can be as follows: a second spring groove 93 is opened on the side of the second operating plate 73 facing the back plate 22, and a spring post 91 is provided on the groove wall at one end of the second spring groove 93 for one end of the return spring 9 to be fitted. The other end of the return spring 9 abuts against the first stroke post 223. The return spring 9 is installed between the back plate 22 and the second operating plate 73 and provides elastic reset force for the second operating plate 73.

[0059] Reference Figures 9-11There are two supports 1, located on both sides of the seat 2. Each support 1 includes two legs 11 and a rotating disk 12. The upper ends of the two legs 11 are rotatably connected and equipped with a travel limit structure. Specifically, a rotating shell 13 and a rotating block 14 are respectively installed on the upper ends of the two legs 11, along with a travel disk 15. The rotating shell 13 has a groove for the rotating block 14 to extend into. After the rotating block 14 extends into the rotating shell 13, it is rotatably connected via a rotating shaft. The rotating block 14 has a travel groove 141. 141 has two separate rotating blocks 14 on both sides of the rotation center. The stroke disk 15 is fixed to the rotating shell 13. The stroke disk 15 has two buckles 151 for buckling. The two buckles 151 are located on both sides around the rotation center of the rotating shell 13. The two buckles 151 extend into the two stroke grooves 141 one by one. By sliding the buckles 151 in the stroke grooves 141, the angle of the two supports 1 of the bracket 1 is limited. In this embodiment, the two legs 11 are inverted V shape after being unfolded.

[0060] The rotating disk 12 is used for mounting the seat 2. The rotating disk 12 is slidably mounted on a support leg 11 and can slide along the length of the support leg 11. A sliding locking structure is provided between the rotating disk 12 and the support leg 11. In this embodiment, the sliding locking structure can adopt an elastic buckle 151 structure. Multiple holes are opened on the support leg 11 along the length to realize multi-level adjustment of the height of the rotating disk 12, and finally realize multi-level adjustment of the height of the seat 2.

[0061] The rotating disk 12 of the aforementioned bracket 1 is mounted on the support leg 11 on the same side. Meanwhile, the support legs 11 on the same side of the two brackets 1 are connected together by a U-shaped base frame 4. Anti-slip pads 5 are also installed on both sides of the U-shaped base frame 4.

[0062] Referring to 12-14, when the seat 21 is in the storage state, the rotatable connection between the back panel 22 and the seat 21 is located on the upper side of the seat 21, and the back panel 22 is flipped down and folded with the seat 21 to the storage state.

[0063] Reference Figure 15 and Figure 17 There are two armrests 23, each on one side corresponding to one of the two supports 1. One end of the armrest 23 is rotatably connected to the back panel 22. There are two armrest support rods 24, each corresponding to one of the two armrests 23. One end of the armrest support rod 24 is rotatably connected to the end of the armrest 23 away from the back panel 22, and the other end is rotatably connected to the seat 21. The whole structure forms a parallelogram. When the back panel 22 is unfolded, the armrests 23 also unfold accordingly.

[0064] A serving board 3 is also provided. The serving board 3 is placed on the armrest 23 and a horizontal displacement limiting structure is provided between it and the seat 2. Specifically, the inner sides of the two armrests 23 that are close to each other are provided with placement grooves 231. There are multiple placement grooves 231, which are spaced apart along the length of the armrest 23. In this embodiment, there are three placement grooves 231. The surface of the serving board 3 facing the seat 21 is provided with two slide blocks 31. The two slide blocks 31 are located on both sides, corresponding to the two seats. The armrest 23 has two sliding blocks 31 with opposite sidewalls having mounting tracks 32. At the same time, the plate 3 facing the seat 21 has an insert block 33 protruding from both mounting tracks 32. The insert block 33 is vertically inserted into the placement groove 231 and restricts the plate 3 from moving along the length of the armrest 23. The armrest 23 first slides horizontally into the mounting track 32, and then the plate moves down to complete the placement of the plate. The presence of the sliding block 31 prevents the plate from being directly lifted up, ensuring a stable state during placement.

[0065] Meanwhile, the plate placement settings can be displayed on the armrest 23. When the edge of the plate aligns with the setting indicator, the corresponding setting is reached, facilitating the positioning of the plate.

[0066] The implementation principle of a folding dining chair that is easy to unfold and store with one hand according to an embodiment of this application is as follows: the seat 21 is connected to the legs 11 by a single connection, and the back panel 22 is connected to the seat 21 by a single connection. When the seat 21 and the legs 11 are stored, the first locking pin 61 abuts against the rotating disk 12, so there is no need to unlock it. By holding the back panel 22 and operating the second operating plate 73, the back panel 22 can be flipped upward, which in turn drives the armrests 23 and the seat 21 to flip to the corresponding positions and complete the locking. The unfolding process is simple and convenient and can be completed with one hand.

[0067] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A type of seat, characterized in that: The device includes a seat (21) and a backrest (22). One side of the backrest (22) is rotatably connected to one side of the seat (21) and is provided with a backrest locking structure (7) to keep the backrest (22) in an unfolded state. Limiting protrusions (215) are provided on both sides of the seat (21). The backrest (22) is located between the two limiting protrusions (215) and is rotatably connected to the limiting protrusions (215). The backrest locking structure (7) includes a second locking post (71), a second elastic plastic strip (72), a second operating plate (73), and a reset structure. The second operating plate (73) is slidably installed on the backrest (22). There are two of the second elastic plastic strip (72) and the second locking post (71). One end of each of the two second elastic plastic strips (72) is connected to the second operating plate (73), and the other end is connected to the two second locking posts (71) one by one. The second locking post (71) is slidably installed on the back plate (22), and one end of the second locking post (71) slides out of the side wall of the back plate (22). The reset structure elastically keeps one end of the second locking post (71) protruding from the side wall of the back plate (22). The limiting protrusion (215) has at least two stop holes (217) for the second locking post (71) to be inserted.

2. The seat according to claim 1, characterized in that: The limiting protrusion (215) has a locking groove (216) for the second locking pin (71) to slide, and the stop hole (217) is opened at the bottom of the locking groove (216).

3. A seat according to claim 2, characterized in that: The second operating plate (73) extends along the sliding direction and is provided with a sliding protrusion (74). The sliding protrusion (74) is provided with a first stroke hole (75) along the sliding direction. The first stroke hole (75) is a waist-shaped hole. The back plate (22) is provided with a first stroke post (223) that slides in the first stroke hole (75). The first stroke post (223) is threaded with a screw that restricts the sliding protrusion (74) from disengaging from the back plate (22). When the second operating plate (73) drives the sliding protrusion (74) to unlock and slide to the stroke limit of the first stroke hole (75), the second locking post (71) disengages from the gear hole (217).

4. A seat according to claim 3, characterized in that: The back plate (22) is also slidably mounted with a gear adjustment locking block (8). The second operating plate (73) has a second stroke hole (76) on its side wall for the gear adjustment locking block (8) to slide into. When the second operating plate (73) is unlocked and slid to the stroke limit of the second stroke hole (76), the second locking pin (71) disengages from the gear hole (217) and its end is located in the locking groove (216). When the second operating plate (73) drives the sliding protrusion (74) to unlock and slide to the stroke limit of the first stroke hole (75), the second locking pin (71) disengages from the locking groove (216).

5. A seat according to claim 1, characterized in that: The back of the back plate (22) is also provided with a second elastic reset groove (222) for the installation of the second elastic plastic strip (72). One end of the two second elastic plastic strips (72) is connected to the second operating plate (73), and the other end extends toward the two limiting protrusions (215) in a figure-eight shape. The reset structure is formed between the second elastic plastic strip (72) and the second elastic reset groove (222).

6. A seat according to claim 5, characterized in that: The reset structure also includes a reset spring (9), which is installed between the back plate (22) and the second operating plate (73) and provides elastic reset force to the second operating plate (73).

7. A seat according to claim 1, characterized in that: The seat (2) also includes armrests (23) and armrest supports (24). There are two armrests (23), which are located on both sides. One end of the armrest (23) is rotatably connected to the backrest (22). There are two armrest supports (24), which correspond one-to-one with the two armrests (23). One end of the armrest support (24) is rotatably connected to the seat (21), and the other end is rotatably connected to the armrest (23). The armrests (23), the armrest supports (24), the backrest (22), and the seat (21) form a parallelogram structure.

8. A children's high chair, characterized in that: The seat includes a support (1) and a seat (2) as described in any of claims 1-7. There are two supports (1), which are respectively located on both sides of the seat (2). Each support (1) includes two legs (11). The upper ends of the two legs (11) are rotatably connected and provided with a travel limit structure. When the two legs (11) are extended to the end of their travel, they form an inverted V shape. The seat (21) is rotatably connected to one of the legs (11) of each support (1) and is provided with a seat locking structure (6) to keep the seat (21) in the extended state. When the seat (21) is in the retracted state, the back panel (22) is rotatably connected to the seat (21) above the seat (21), and the back panel (22) is folded down with the seat (21) to form a retracted state.

9. A children's high chair according to claim 8, characterized in that: The seat locking structure (6) includes a first locking post (61), a first elastic plastic strip (62), and a first operating plate (63). The back of the seat (21) is provided with a first sliding groove (211) for the first operating plate (63) to slide and install. There are two first elastic plastic strips (62). One end of the two first elastic plastic strips (62) is fixed to one end of the first operating plate (63) in the sliding direction. The other ends of the two first elastic plastic strips (62) extend in a figure-eight shape towards the two support legs (11) rotatably connected to the seat (21). The back of the seat (21) is also provided with a groove for the first elastic plastic strips (62) to install. The first elastic reset groove (212) has two first locking pins (61). The two first locking pins (61) are slidably installed on the back of the seat plate (21), and the two first locking pins (61) correspond one-to-one with the two first elastic plastic strips (62). One end of the first locking pin (61) is connected to the end of the first elastic plastic strip (62) away from the first operating plate (63), and the other end slides out of the side wall of the seat plate (21). The support leg (11) has a locking hole (121) for the first locking pin (61) to be inserted. The locking hole (121) corresponds to the unfolded state of the seat plate (21).

10. A children's high chair according to claim 8, characterized in that: The side wall of the support leg (11) is provided with a travel protrusion (122), and the seat plate (21) is provided with a travel arc groove (214) for the travel protrusion (122) to slide. When the two ends of the travel protrusion (122) in the travel arc groove (214) are at their travel limits, they correspond to the seat plate (21) being in the unfolded state and the retracted state, respectively.

11. A children's high chair according to claim 8, characterized in that: The bracket (1) also includes a rotating disk (12), the seat plate (21) is rotatably connected to the rotating disk (12), and the rotating disk (12) is slidably connected to the support leg (11) and is provided with a sliding locking structure.

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