A folding dining chair

Abstract

This application discloses a folding dining chair that utilizes a linkage hinge mechanism with dual rotation axes. This mechanism allows the main frame to actively adapt its structure to form a storage space after folding, fundamentally solving the industry pain point that previous foldable dining chairs still required separate packaging after folding. It represents a qualitative leap from simple folding to integrated folding and storage. Through the coordinated folding of the rear support, front support, and back frame, it incorporates storage functionality, combining the folding of the main frame with component storage. This allows for the efficient and orderly integration of detachable components such as the seat, footrest, and tray, resulting in a compact, regular, and complete unit. Packaging simply requires placing this unit into a box or bag. This unprecedented reduction in packaging volume significantly lowers costs while greatly enhancing the convenience of storage and organization for consumers. It is an innovative design that combines excellent practicality with outstanding commercial value.

Description

Technical Field

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

[0002] High chairs are common childcare products in modern homes, typically consisting of a main frame and components such as a seat, footrest, and tray mounted on it. To ensure stability and safety during use, existing high chair frames often employ a one-piece or fixed connection structure, resulting in their bulky size and high storage and transportation costs.

[0003] While some foldable dining chairs exist on the market, using hinges and other structures to fold the main frame and reduce volume to some extent, they do not fundamentally optimize the final packaging form. For example:

[0004] When components such as the seat, footrest, and tray are non-removable, the dining chair will have an irregular structure after folding, requiring the manufacturer to design a larger package for storage and packing.

[0005] When components such as the seat, footrest, and tray are detachable, the main frame is separate from the detached components, and the manufacturer still needs a sufficiently large packaging box to accommodate the folded frame and all the loose parts.

[0006] Whether it's a non-detachable integrated type or a detachable distributed type, the packaging method results in a larger overall final packaging volume, failing to maximize savings in logistics costs and increasing the risk of lost or mismatched parts.

[0007] Therefore, the industry urgently needs an innovative folding solution that can organically combine the folding of the main frame with the storage function of the components, forming a compact whole after folding, thereby significantly reducing packaging volume and transportation costs. Utility Model Content

[0008] The purpose of this application is to overcome the shortcomings of the prior art and provide a folding dining chair whose main frame can form a centralized storage space after folding, for storing other parts removed from the chair, thereby minimizing the overall packaging volume.

[0009] To achieve the above objectives, this application proposes a folding dining chair, including a main frame, a seat, a footrest, and a tray detachably connected to the main frame, the main frame including a front support, a rear support, and a back frame;

[0010] The upper part of the front support, the upper part of the rear support, and the back frame are connected by a linkage hinge mechanism.

[0011] The linkage hinge mechanism is provided with a first rotation axis and a second rotation axis arranged at intervals.

[0012] The main frame can be rotated and folded around the first rotation axis and the second rotation axis, so that the main frame can be transformed from an unfolded use state to a folded storage state.

[0013] In the folded storage state, the rear support, front support, and back frame are folded together to form a receiving space, which is used to accommodate at least one of the seat, footrest, and tray that are removed from the main frame.

[0014] Preferably, the linkage mechanism includes a connector and a locking mechanism;

[0015] The connector is fixedly installed on the upper part of the front support; the first position of the connector is hinged to the upper part of the rear support to form the first rotation axis, and the second position of the connector is hinged to the bottom of the back frame to form the second rotation axis.

[0016] When folded, the front support rotates about the first rotation axis toward the rear support until it abuts against the front support, and the back frame rotates about the second rotation axis until it abuts against the front support;

[0017] The locking mechanism is used to lock the front support, rear support, and back frame in the unfolded use state.

[0018] Preferably, the front support includes a pair of first strip members spaced apart from each other on the left and right, and the two first strip members are connected by at least one first connecting rod;

[0019] The rear support includes a pair of second strip members spaced apart from each other on the left and right, and the two second strip members are connected by at least one second connecting rod;

[0020] The back frame includes a pair of third strip members spaced apart from each other on the left and right, and the two third strip members are connected by a back plate;

[0021] There are two connectors, which are respectively fixedly installed on the upper ends of the first strip-shaped components on the left and right sides;

[0022] The first position of each of the connectors is hinged to the upper end of the second strip member on the same side;

[0023] The second position of each of the connectors is hinged to the lower end of the third strip member on the same side.

[0024] Preferably, the locking mechanism includes a slot disposed on the top of the rear support and a slider movably disposed on the back frame;

[0025] When the main frame is in the unfolded use state, the sliding member is aligned with the slot. By inserting the sliding member into the slot, the relative positions of the back frame, front support and rear support can be locked.

[0026] The main frame can be folded by removing the slider from the slot.

[0027] Preferably, it is also provided with an elastic element;

[0028] One end of the elastic element acts on the back frame, and the other end of the elastic element acts on the slider, for applying an elastic force to the slider in the direction of insertion into the slot;

[0029] When the main frame is in the unfolded use state and the slider is aligned with the slot, the slider is automatically inserted into the slot under the drive of the elastic element.

[0030] Specifically, the elastic element is a spring, a tension spring, or other parts with the same or similar effects.

[0031] Preferably, the slot is a blind slot with an open top;

[0032] Alternatively, the top and front of the slot are open, the slider is provided with a limiting groove, and the slot is provided with a limiting strip. When the slider is inserted into the slot, the limiting strip is inserted into the limiting groove on the slider to prevent the slider from coming out of the front opening of the slot.

[0033] Preferably, the two ends of the connector form the first position and the second position, respectively;

[0034] The top of the connector forms a conical portion, which has a first mating surface and a second mating surface;

[0035] The rear support can rotate around the first rotation axis, so that the upper part of the rear support abuts against or moves away from the first mating surface;

[0036] The back frame can rotate around the second rotation axis, so that the bottom of the back frame abuts against or moves away from the second mating surface;

[0037] When the upper part of the rear support abuts against the first mating surface and the bottom of the back frame abuts against the second mating surface, the main frame is in the unfolded use state.

[0038] Preferably, the upper part of the rear support is provided with a groove that matches the partial shape of the connector;

[0039] The groove is provided with a positioning element;

[0040] The connector is provided with a corresponding positioning groove;

[0041] A portion of the positioning member is inserted into the positioning groove and hinged, thereby achieving the hinged connection between the rear support and the connecting member at the first position;

[0042] When the upper part of the rear support abuts against the first mating surface, the positioning member is accommodated in the positioning groove;

[0043] When the upper part of the rear support moves away from the second mating surface, a portion of the positioning member exits the positioning groove.

[0044] Preferably, the plate has two rearwardly extending connecting arms on its rear side;

[0045] The free end of the connecting arm is provided with an upward-facing hook, and the outer bottom wall of the hook is provided with a downward-protruding pressing part;

[0046] Both sides of the back plate are provided with upper connecting parts and lower connecting parts arranged at intervals, and the space between the upper connecting parts and the lower connecting parts is available for the hook to extend into.

[0047] It is also provided with a support arm, the upper end of which is detachably connected and locked to the bottom of the plate, and the lower end of which is detachably connected and locked to the seat, so as to achieve secondary fixation of the plate through the support arm.

[0048] Preferably, each of the two first strip members is movably provided with a first slide block, the first slide block being able to reciprocate in the extension direction of the first strip member and being able to lock with the first strip member;

[0049] Each of the two third strip members is movably provided with a second slide block, which can reciprocate along the extension direction of the third strip member and can be locked with the third strip member;

[0050] The left and right sides of the foot pedal are respectively detachably connected and locked to the two first slide blocks;

[0051] The left and right sides of the seat are respectively detachably connected and locked to the two second slides.

[0052] Preferably, the inner sidewall of the first strip member is provided with a guide groove along its length;

[0053] The first slide block is fixedly provided with a slider that is adapted to the shape of the guide groove. The slider is movably embedded in the guide groove, so that the first slide block and the first strip member form a sliding fit.

[0054] The inner wall of the guide groove is provided with a plurality of first locking holes spaced apart along the length of the first strip member;

[0055] The first slide is provided with a first locking key, a button for operating the first locking key, and a first top spring;

[0056] The first top spring applies a spring force to the first locking key, causing it to move toward the first keyhole;

[0057] In its natural state, the first locking key can be inserted into any of the first locking holes in the guide groove under the elastic force applied by the first top spring, thereby locking the first slide.

[0058] Pressing the button can drive the first locking key to overcome the elastic force of the first top spring and push it out of the first lock hole, thereby releasing the lock on the first slide and allowing the first slide to slide along the guide groove.

[0059] Preferably, the first slide has a plug-in position, and the foot pedal has plug-in parts on both sides that are adapted to the shape of the plug-in position. The foot pedal is inserted into the plug-in position of the first slide through the plug-in parts to achieve a detachable connection.

[0060] The side wall of the plug-in position is provided with a second locking hole, and the foot pedal is provided with a second locking key, a second top spring, and an unlocking component that is linked to the second locking key;

[0061] When the plug is inserted into the plug position until the second locking key is aligned with the second lock hole, the second locking key automatically slides into the second lock hole under the elastic force of the second top spring, thereby realizing the connection and locking between the foot pedal and the first slide.

[0062] Operating the unlocking mechanism can drive the second locking key to overcome the elastic force of the second top spring and exit the second lock hole, thereby allowing the foot pedal to be pulled out and removed from the first slide.

[0063] Preferably, the sliding and locking method between the second slide and the third strip member is the same as the sliding and locking method between the first slide and the first strip member;

[0064] The detachable connection locking method between the seat and the second slide is the same as the detachable connection locking method between the foot pedal and the first slide.

[0065] The most prominent substantive feature and significant advancement of this application lies in its innovative design of a linkage hinge mechanism with dual rotation axes. This mechanism allows the main frame to actively cooperate and form a regular, accommodating space after folding. This fundamental change completely solves the industry pain point of traditional foldable dining chairs requiring separate packaging after folding. It represents a qualitative leap from simple folding to integrated folding and storage. Through the coordinated folding of the rear support, front support, and back frame, it incorporates storage functionality, combining the folding of the main frame with the storage of components. This allows for the efficient and orderly integration of detachable components such as the seat, footrest, and tray, resulting in an extremely compact, regular, and complete unit. Packaging simply requires placing this unit into a box or bag. This design delivers revolutionary space utilization, resulting in unprecedented reductions in packaging volume. It also demonstrates significant economic benefits in logistics and warehousing, drastically reducing costs while greatly enhancing the convenience of storage and organization for consumers. It is an innovative design that combines excellent practicality with outstanding commercial value. Attached Figure Description

[0066] Figure 1 This is a perspective view of the application when unfolded;

[0067] Figure 2 This is a side view of the application when unfolded;

[0068] Figure 3 This is a schematic diagram of the first angle when the object is folded.

[0069] Figure 4 This is a schematic diagram of the second angle when the object is folded.

[0070] Figure 5 A side view of the main frame during the folding process;

[0071] Figure 6 A 3D view of the front support, rear support, and back frame;

[0072] Figure 7 A three-dimensional view of the connector;

[0073] Figure 8 This is a three-dimensional view of the first slide.

[0074] Figure 9 This is a diagram of a dinner plate.

[0075] Figure 10 This is a schematic diagram of the foot pedal;

[0076] Figure 11 This is a schematic diagram of the inside of the foot pedal. Detailed Implementation

[0077] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0078] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0079] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0080] This application proposes a folding dining chair.

[0081] In the embodiments of this application, such as Figures 1 to 11 As shown, the folding dining chair includes a main frame, a seat 1, a footrest 2, and a tray 3 detachably connected to the main frame, and the main frame includes a front support 4, a rear support 5, and a back frame 6.

[0082] The upper part of the front support 4, the upper part of the rear support 5, and the back frame 6 are connected by a linkage hinge mechanism.

[0083] The linkage hinge mechanism is provided with a first rotation axis and a second rotation axis arranged at intervals.

[0084] The main frame can be rotated and folded around the first rotation axis and the second rotation axis, so that the main frame can be transformed from an unfolded use state to a folded storage state.

[0085] In the folded storage state, the rear support 5, the front support 4, and the back frame 6 are folded together to form a receiving space 7, which is used to accommodate at least one of the seat 1, footrest 2, and plate 3 that are removed from the main frame.

[0086] Specifically, the linkage hinge mechanism, through the setting of two spaced rotation axes, realizes the folding function of multiple components of the main frame in a coordinated manner. This is the core of achieving the specific folding form, and its core innovation lies in the creative combination of folding and storage functions. The folded main frame is no longer a single-function structural component, but transforms into a packaging container. This containerized folding form allows the dining chair itself to be its own packaging box, fundamentally solving the problem of excessively large packaging volume required for multiple individual components, greatly optimizing logistics efficiency, and reducing warehousing and transportation costs.

[0087] Specifically, the linkage mechanism includes a connector 8 and a locking mechanism;

[0088] The connector 8 is fixedly installed on the upper part of the front support 4; the first position 81 of the connector 8 is hinged to the upper part of the rear support 5 to form the first rotation axis, and the second position 82 of the connector 8 is hinged to the bottom of the back frame 6 to form the second rotation axis.

[0089] When folded, the front support 4 rotates around the first rotation axis toward the rear support 5 until it abuts against the front support 4, and the back frame 6 rotates around the second rotation axis until it abuts against the front support 4.

[0090] The locking mechanism is used to lock the front support 4, the rear support 5, and the back frame 6 in the unfolded use state.

[0091] In the folded storage state, the front support 4 is located between the rear support 5 and the back frame 6. The left sides of the rear support 5, the front support 4, and the back frame 6 are on the same plane or close to the same plane, and the right sides of the rear support 5, the front support 4, and the back frame 6 are on the same plane or close to the same plane.

[0092] The connector 8, as an independent integrated component, is fixed to the front support 4 and integrates two hinge points, forming a stable folding hub. The abutting structural design provides a clear termination point for the folding process, ensuring the stability and consistency of the folded shape.

[0093] The independent connector 8 structure enhances the strength and durability of the hinge area;

[0094] The abutting design means that the components support each other after folding, and can maintain a stable folded state without the need for additional locking devices, making the structure simple and reliable.

[0095] Users can fold the fold with a simple rotating motion and receive clear operational feedback through physical contact, making it intuitive, easy to understand, and providing a good user experience.

[0096] The locking mechanism ensures safety when unfolded, while the foldable design ensures extreme compactness when stored, achieving the optimal solution for the product's functionality in different usage stages.

[0097] Specifically, the front support 4 includes a pair of first strip members 41 spaced apart from each other, and the two first strip members 41 are connected by at least one first connecting rod 42;

[0098] The rear support 5 includes a pair of second strip members 51 spaced apart from each other on the left and right, and the two second strip members 51 are connected by at least one second connecting rod 52;

[0099] The back frame 6 includes a pair of third strip members 61 spaced apart from each other on the left and right, and the two third strip members 61 are connected by a back plate 62;

[0100] There are two connectors 8, which are respectively fixedly installed on the upper ends of the first strip member 41 on the left and right sides;

[0101] The first position 81 of each of the connectors 8 is hinged to the upper end of the second strip member 51 on the same side;

[0102] The second position 82 of each of the connectors 8 is hinged to the lower end of the third strip member 61 on the same side.

[0103] Specifically, the first, second, and third strip components preferably adopt a uniform specification, such as a long, flat structure as shown in the figure. This structure can form a regular and neat square unit after the main frame is folded, making it easy to put into a packaging box or bag.

[0104] Specifically, the two connecting parts 8 are connected by the second connecting rod 52.

[0105] This embodiment adopts a symmetrical frame structure and is hinged to the supporting members on the left and right sides by a pair of connectors 8, thereby achieving overall symmetrical folding.

[0106] The paired strip components and connecting rods form a stable frame structure, ensuring the rigidity and safety of the dining chair when it is under load.

[0107] The symmetrical design ensures even stress distribution on both sides after folding, allowing the overall structure to fold flat and avoiding irregular bulges. This results in a very neat overall outline after folding, resembling a flat box, which greatly facilitates subsequent packaging, such as packing into a cardboard box, and is one of the key design features for achieving ultra-small packaging volume.

[0108] The symmetrically folded space is neat and spacious, free from any protrusions, making it easy to efficiently place and arrange various shapes of components such as seats 1 and plates 3, resulting in extremely high space utilization.

[0109] Specifically, the locking mechanism includes a slot 53 disposed on the top of the rear support 5 and a sliding member 63 movably disposed on the back frame 6;

[0110] When the main frame is in the unfolded use state, the sliding member 63 is aligned with the slot 53. By inserting the sliding member 63 into the slot 53, the relative positions of the back frame 6, the front support 4 and the rear support 5 can be locked.

[0111] The main frame can be folded by removing the slider 63 from the slot 53.

[0112] When the main frame is unfolded from the folded state to the use state, the back frame 6 rotates relative to the rear support 5, causing the slider 63 on the back frame 6 to automatically align with the slot 53 on the top of the rear support 5. The user can push the slider 63 to insert it into the slot 53.

[0113] The cooperation between the sliding member 63 and the slot 53 effectively restricts the relative rotation between the back frame 6 and the front support 4, as well as between the front support 4 and the rear support 5, thereby locking the entire main frame in a stable triangular support state, preventing accidental folding and ensuring the safety of children riding in it.

[0114] When folding and storing is required, the user reverses the operation of the slider 63 to disengage it from the slot 53. Once disengaged, the lock between the back frame 6 and the rear support 5 is released, allowing the user to manipulate the main frame to fold around the first and second rotation axes.

[0115] Specifically, to further improve the ease of operation and the reliability of locking, an elastic element is also provided;

[0116] One end of the elastic element acts on the back frame 6, and the other end of the elastic element acts on the slider 63, for applying an elastic force to the slider 63 in the direction of insertion into the slot 53;

[0117] When the main frame is in the unfolded use state and the sliding member 63 is aligned with the slot 53, the sliding member 63 is automatically inserted into the slot 53 under the drive of the elastic element.

[0118] This design greatly simplifies the user's operation, eliminating the need to manually push in the slider 63, achieving the effect of unlocking upon unfolding, and effectively avoiding the security risks caused by the user forgetting to manually lock it.

[0119] When unlocking is required, the user must manually overcome the elastic force of the elastic element to remove the slider 63 from the slot 53 and hold it in place before folding can be performed. The presence of spring force can prevent the slider 63 from accidentally coming loose under vibration, further enhancing the reliability of the lock.

[0120] When the slider 63 is quickly inserted into the slot 53 under the action of spring force, it is usually accompanied by a cleaning sound and tactile sensation, providing the user with a positive and clear locked signal and enhancing the user experience.

[0121] Specifically, the locking mechanism's slot 53 can have two preferred embodiments:

[0122] The card slot 53 is a blind slot with an open top;

[0123] Alternatively, the top and front of the slot 53 are open, the slider 63 is provided with a limiting groove 64, and the slot 53 is provided with a limiting strip. When the slider 63 is inserted into the slot 53, the limiting strip is inserted into the limiting groove 64 on the slider 63 to prevent the slider 63 from coming out of the front opening of the slot 53.

[0124] In the first embodiment, the slot 53 is a blind slot that is open at the top and closed on the other sides. This structure provides good lateral restraint. Correspondingly, sufficient clearance is required between the insertion end of the slider 63 and the back frame 6 to ensure that the slider 63 does not interfere with the rear support 5, thus avoiding the situation where the slot 53 cannot be inserted.

[0125] In the second embodiment, the top and front of the slot 53 are both designed to be open. The advantage of this design is that it reduces the installation requirements for the slider 63, eliminating the need for a large gap between it and the back frame 6 body; it only requires ensuring that the slider can slide. The open front of the slot 53 provides clearance for the insertion of the slider 63. To compensate for the lack of limiting action caused by the open front, a limiting strip and a limiting groove 64 are provided, thus forming a mechanical interlock in the front-rear direction. This effectively prevents the slider 63 from accidentally dislodging from the open front during use, ensuring the reliability of the locking mechanism.

[0126] Specifically, the number of the sliding members 63 is at least one, preferably a pair, with the two sliding members 63 respectively movably disposed on the two third strip members 61; correspondingly, the two slots 53 are respectively disposed on the two second strip members 51.

[0127] Specifically, the two ends of the connector 8 form the first position 81 and the second position 82, respectively;

[0128] The top of the connector 8 forms a conical portion 83, and the conical portion 83 has a first mating surface 84 and a second mating surface 85.

[0129] The rear support 5 can rotate around the first rotation axis, so that the upper part of the rear support 5 abuts against or moves away from the first mating surface 84.

[0130] The back frame 6 can rotate around the second rotation axis, so that the bottom of the back frame 6 abuts against or moves away from the second mating surface 85;

[0131] When the upper part of the rear support 5 abuts against the first mating surface 84 and the bottom of the back frame 6 abuts against the second mating surface 85, the main frame is in the unfolded use state.

[0132] Specifically, the connector 8 is locked to the first strip member 41 by screws or by a snap-fit ​​structure.

[0133] The first mating surface 84 and the second mating surface 85 are two intersecting planes or curved surfaces, which serve as mechanical limiting surfaces.

[0134] When the main frame is unfolded, the user rotates the back frame 6, causing it to rotate around the second rotation axis, until the bottom of the back frame 6, that is, the lower end wall of the third strip member 61, finally abuts tightly against the second mating surface 85, and can no longer rotate forward.

[0135] At the same time, the user adjusts the rear support 5 to rotate it around the first rotation axis until the upper part of the rear support 5, that is, the upper end of the second strip member 51, is tightly abutted against the first mating surface 84 of the conical part 83 of the connector 8, and can no longer rotate backward.

[0136] At this point, both the back frame 6 and the rear support 5 are precisely blocked and positioned by the two mating surfaces of the connector 8, and the entire main frame is firmly fixed in a predetermined stable triangular configuration, i.e., the fully unfolded use state. This rigid abutment limiting method, compared with relying solely on hinge friction or a separate locking mechanism, can withstand greater forces and torques, significantly enhancing the structural stability and safety of the dining chair.

[0137] When folding is required, the locking mechanism must be released first, and then the operation should be reversed to disengage the back frame 6 and the rear support 5 from their respective mating surfaces.

[0138] Specifically, the second mating surface 85 is provided with a protrusion 851, and the lower end wall of the third strip member 61 is provided with a matching concave hole. When the lower end wall of the third strip member 61 is tightly abutted against the second mating surface 85, the protrusion 851 is in the concave hole.

[0139] Specifically, to achieve the hinge connection between the rear support 5 and the connector 8 and to provide motion trajectory guidance:

[0140] The upper part of the rear support 5 is provided with a groove 54 that is adapted to the partial shape of the connector 8;

[0141] The groove 54 is provided with a positioning element 55;

[0142] The connector 8 is provided with a corresponding positioning groove 86;

[0143] A portion of the positioning member 55 is inserted into the positioning groove 86 and hinged, thereby achieving the hinged connection between the rear support 5 and the connecting member 8 at the first position 81.

[0144] When the upper part of the rear support 5 abuts against the first mating surface 84, the positioning member 55 is accommodated in the positioning groove 86;

[0145] When the upper part of the rear support 5 moves away from the second mating surface 85, a portion of the positioning member 55 exits the positioning groove 86.

[0146] During assembly, one end of the connector 8 is inserted into the groove 54 of the rear support 5, and the positioning member 55 is inserted into the positioning groove 86 of the connector 8. The hinge is then achieved by rivets or a hinge shaft. In this way, the positioning member 55 acts as the rotation axis of the hinge, realizing the first rotation axis. Its cooperation with the positioning groove 86 also forms a sliding pair, which guides and limits the rotation range of the rear support 5.

[0147] During operation, in the unfolded state, when the rear support 5 rotates until the inner wall of the groove 54 tightly abuts against the first mating surface 84 of the connector 8, the positioning member 55 is precisely and completely accommodated inside the positioning groove 86. At this time, there is no relative movement between the mating surfaces of the positioning member 55 and the positioning groove 86, which provides additional stability to the entire hinge point and enhances its ability to resist lateral forces.

[0148] During the folding process and as the rear support 5 disengages from the first mating surface 84, the rear support 5 rotates around the positioning member 55, that is, around the first rotation axis. Simultaneously, due to the change in the relative position between the connecting member 8 and the rear support 5, a portion of the positioning member 55 gradually exits the positioning groove 86. However, due to its hinged function, a portion of the positioning member 55 remains within the positioning groove 86, ensuring that the two do not separate and maintaining the hinged relationship until folding is complete.

[0149] Specifically, the back frame 6 and the connecting piece 8 can be directly hinged by rivets or hinge shafts.

[0150] Specifically, the plate 3 has two rearwardly extending connecting arms 31 on its rear side;

[0151] The free end of the connecting arm 31 is provided with an upward-facing hook portion 32, and the outer bottom wall of the hook portion 32 is provided with a downward-protruding pressing portion 33.

[0152] Both sides of the back plate 62 are provided with an upper connecting part 65 and a lower connecting part 66 arranged at an interval between them. The space between the upper connecting part 65 and the lower connecting part 66 is available for the hook part 32 to extend into.

[0153] The plate is also provided with a support arm 9, the upper end of which is detachably connected and locked to the bottom of the plate 3, and the lower end of which is detachably connected and locked to the seat plate 1, so as to achieve secondary fixation of the plate 3 through the support arm 9.

[0154] The installation process consists of two steps:

[0155] Step 1: Initial fixation.

[0156] The user lifts the plate 3, aligning the hooks 32 at the ends of the two connecting arms 31 with the gaps between the upper connecting parts 65 and the lower connecting parts 66 on both sides of the back plate 62. Then, the user lowers the plate 3, allowing the hooks 32 to engage in the gap. At this point, the hooks 32 will grip or cover the upper connecting part 65 from the outside, while the pressing parts 33 on the hooks 32 will press firmly against the surface of the lower connecting part 66. Through this hook-pressing action, the plate 3 is initially defined in both the front-to-back and up-to-down directions, completing the connection with the back frame 6. This eliminates the need for precise alignment of screw holes or complex locking mechanisms, enabling quick blind assembly of the plate 3 and providing an excellent user experience.

[0157] Step 2: Secondary fixation.

[0158] To further enhance the load-bearing capacity of the plate 3 and prevent its front end from sagging, one or two support arms 9 are provided. The upper end of the support arm 9 is connected and locked to the bottom of the plate 3 via a quick-release structure, and the lower end of the support arm 9 is also connected and locked to the seat plate 1 via a quick-release structure. The support arms 9 form a stable triangular support, effectively transferring the weight of the front of the plate 3 to the seat plate 1 and the main frame, achieving final and secure fixation of the plate 3. This ensures that the plate 3 will not loosen or tip over even when subjected to a large load or pushed by a child, providing extremely high safety and stability.

[0159] During disassembly, first release the locks at both ends of the support arm 9 and remove it. Then, simply lift the plate 3 upwards to disengage the hook 32 from the back frame 6.

[0160] This structure primarily utilizes the connecting arm 31 of the plate 3 itself to achieve its function, eliminating the need for additional metal hinges or complex locks on the plate 3. The structure is simple, inexpensive, and reliable. Both the disassembled plate 3 and the support arm 9 can be placed into the folded space created by the main frame, perfectly aligning with the core objective of this application: reducing packaging volume.

[0161] Specifically, the upper end of the support arm 9 and the bottom of the plate 3, as well as the lower end of the support arm 9 and the seat 1, are preferably detachably connected and locked via a button pin mechanism.

[0162] Taking the connection between the upper end of the support arm 9 and the plate 3 as an example: The bottom of the plate 3 has a slot for the upper end of the support arm 9 to be inserted horizontally. A push-button pin is located in the slot. Under normal circumstances, the pin head of the push-button pin pops out under the action of an internal spring. When the upper end of the support arm 9 is inserted horizontally into the slot, the upper end of the support arm 9 can overcome the spring force and force the pin head back into the plate 3. When the support arm 9 is inserted beyond the pin head, the spring force is released, popping the pin head out. The upper end of the support arm 9 cannot move out of the slot due to the position restriction of the pin head. To release the connection, simply press the pin head with external force and then pull out the support arm 9.

[0163] With this conventional yet efficient quick-release structure, users can quickly and easily install or remove the support arm 9 without tools. The operation is extremely simple, further enhancing the overall user experience of assembling and disassembling the plate 3, and facilitating subsequent folding and storage.

[0164] Specifically, to allow for adjustable seat and footrest heights to accommodate children at different growth stages, this application incorporates an adjustable mounting structure:

[0165] Each of the two first strip members 41 is movably provided with a first slide block 43, which can reciprocate in the extension direction of the first strip member 41 and can be locked with the first strip member 41.

[0166] Each of the two third strip members 61 is movably provided with a second slide block 67, which can reciprocate along the extension direction of the third strip member 61 and can be locked with the third strip member 61.

[0167] The left and right sides of the foot pedal 2 are respectively detachably connected and locked to the two first slide blocks 43;

[0168] The left and right sides of the seat 1 are respectively detachably connected and locked to the two second slides 67.

[0169] When adjusting the height of the footrest 2, first release the lock of the first slide 43, slide it to the appropriate position, and then lock it again. Adjusting the height of the seat 1 is done similarly by operating the second slide 67. When folding the dining chair, first remove the seat 1 and footrest 2 from their respective slides, then fold the main frame, and finally place the removed parts into the folded storage space.

[0170] By adjusting the height of the seat 1 and footrest 2, it can perfectly accommodate users of different heights and sitting postures, from infants to preschool children, greatly expanding the product's age range of use and realizing a long-life design where a dining chair accompanies a child throughout their childhood, thus enhancing the product's value.

[0171] Users can quickly adjust the height without tools or through simple operations, meeting the flexibility and personalization needs of daily use, and significantly improving the user experience.

[0172] The adjustment mechanism does not conflict with the main frame structure. All components remain detachable, perfectly serving the core purpose of unified storage after folding, achieving a balance between functionality and convenience.

[0173] Specifically, to further optimize the user experience, this application also provides an easy-to-operate sliding locking structure for adjusting the height of the seat 1 and the foot pedal 2 and locking them quickly:

[0174] The inner sidewall of the first strip member 41 is provided with a guide groove 44 along its length direction;

[0175] The first slide block 43 is fixedly provided with a slider 45 that is adapted to the shape of the guide groove 44. The slider 45 is movably embedded in the guide groove 44, so that the first slide block 43 and the first strip member 41 form a sliding fit.

[0176] The inner wall of the guide groove 44 is provided with a plurality of first locking holes 46 spaced apart along the length direction of the first strip member 41;

[0177] The first slide block 43 is provided with a first locking key 47, a button 48 for operating the first locking key 47, and a first top spring;

[0178] The first top spring applies a spring force to the first locking key 47, causing it to move toward the first lock hole 46;

[0179] In its natural state, the first locking key 47 can be inserted into any of the first locking holes 46 of the guide groove 44 under the elastic force applied by the first top spring, thereby locking the first slide block 43.

[0180] Pressing the button 48 can drive the first locking button 47 to overcome the elastic force of the first top spring and push it out of the first locking hole 46, thereby releasing the lock on the first slide block 43 and allowing the first slide block 43 to slide along the guide groove 44.

[0181] Specifically, button 48 and the first locking button 47 are linked by direct connection or by pushing through a structure such as an inclined plane.

[0182] The beneficial effects are:

[0183] Users can complete all operations of pressing to unlock, sliding, and releasing to lock with one hand. The adjustment process is smooth, fast, and effortless, and the interactive experience is excellent.

[0184] The first locking key 47 and the first locking hole 46 are directly mechanically engaged, providing high rigidity and strong load-bearing capacity. This ensures that the foot pedal 2 will not slip or shift during use, ensuring safety and reliability. Multiple first locking holes 46 provide multiple defined and fixed height settings.

[0185] When the first locking key 47 falls into the first lock hole 46, it will produce a crisp sound and a clear tactile feel, providing the user with a locking confirmation signal for the first slide 43.

[0186] The entire locking mechanism can be built into the slide, and only parts of button 48 and the first locking button 47 are visible on the outside, making the product look simple and beautiful.

[0187] Specifically, the first slide block 43 is provided with a plug-in position 49, and the foot pedal 2 is provided with plug-in parts 21 on both sides that are adapted to the shape of the plug-in position 49. The foot pedal 2 is detachably connected by inserting into the plug-in position 49 of the first slide block 43 through the plug-in parts 21.

[0188] The side wall of the insertion position 49 is provided with a second locking hole, and the foot pedal 2 is provided with a second locking key 22, a second top spring 23 and an unlocking component 24 that is linked to the second locking key 22;

[0189] When the plug part 21 is inserted into the plug position 49 until the second locking key 22 is aligned with the second lock hole, under the elastic force of the second top spring 23, the second locking key 22 automatically slides into the second lock hole, thereby realizing the connection and locking between the foot pedal 2 and the first slide block 43.

[0190] Operating the unlocking component 24 can drive the second locking key 22 to overcome the elastic force of the second top spring 23 and exit the second lock hole, thereby allowing the foot pedal 2 to be pulled out and removed from the first slide block 43.

[0191] The unlocking component 24 drives the second locking key 22 via an internal inclined plane or linkage mechanism, causing it to retract from the second lock hole against the force of the second top spring 23. Once the second locking key 22 disengages from the second lock hole, the user can directly pull out the foot pedal 2 to complete the disassembly.

[0192] Specifically, a third top spring 25 is also provided. After the unlocking component 24 drives the second locking key 22 to exit the second lock hole, the unlocking component 24 can be automatically reset by the elastic force applied by the third top spring 25.

[0193] Specifically, the second locking key 22 is inserted into the second lock hole after passing through the plug part 21.

[0194] Beneficial effects: Users can complete installation and automatic locking with a single insertion action; disassembly is completed with a single press of the unlocking piece 24 followed by a pull-out action. This greatly simplifies preparation before folding and storage, enhancing the user experience. The top-spring driven mechanical interlock provides high connection strength and effectively prevents the foot pedal 2 from accidentally coming loose during child use, ensuring safety. The complete locking structure is built into the foot pedal 2, with the unlocking piece 24 located at the bottom of the foot pedal 2 and flush with or not exceeding the bottom wall of the foot pedal 2. This results in a simple and integrated appearance, avoiding exposed complex mechanisms and improving both product aesthetics and safety. This quick disassembly function is a key element in realizing the core idea of ​​removing components and placing them into the storage space of the frame, making the entire folding and storage process very smooth and efficient.

[0195] Specifically, the preferred adjustment and connection methods described above also apply to the installation of seat 1:

[0196] The sliding and locking mechanism between the second slide 67 and the third strip member 61 is the same as that between the first slide 43 and the first strip member 41; that is, the specific structure and working principle are exactly the same. Of course, different structures can be used in other embodiments.

[0197] The detachable connection locking method between the seat 1 and the second slide 67 is the same as the detachable connection locking method between the foot pedal 2 and the first slide 43. That is, the specific structure and working principle are exactly the same. Of course, different structures can be used in other embodiments.

[0198] This symmetrical and standardized design means that the height adjustment of the seat 1 is the same as the height adjustment of the foot pedal 2, and the disassembly and assembly of the seat 1 is also the same as the disassembly and assembly of the foot pedal 2.

[0199] Using the same adjustment and connection structures in different parts reduces the number of parts and lowers the complexity and cost of manufacturing, warehousing management, and after-sales maintenance. Users only need to learn one operating method to master the adjustment and disassembly of the seat 1 and foot pedal 2, greatly improving the product's ease of use and user experience.

[0200] Specifically, the foot pedal 2 is provided with anti-slip texture.

[0201] It should be noted that, as described above and shown in the accompanying drawings, placing the removed seat 1, footrest 2, and tray 3 within the accommodating space formed by the folded main frame is the preferred embodiment of this application. This method achieves the minimum overall packaging volume.

[0202] However, the scope of protection for this patent application is not limited to this specific placement method. Any solution that utilizes the folded main frame as a support, reliance, or enclosure structure to integrate, accommodate, and organize the removable components—for example, placing components on top of, to the side of, or bound to the folded structure—thereby reducing the overall storage volume, falls within the scope of protection for this application. The core of this application lies in using the specific folding method to make the main frame itself form an integrated platform or storage base that can be used for optimized packaging.

[0203] The most prominent substantive feature and significant advancement of this application lies in its innovative design of a linkage hinge mechanism with dual rotation axes. This mechanism allows the main frame to actively cooperate and form a regular, accommodating space after folding. This fundamental change completely solves the industry pain point of traditional foldable dining chairs requiring separate packaging after folding. It represents a qualitative leap from simple folding to integrated folding and storage. Through the coordinated folding of the rear support, front support, and back frame, it incorporates storage functionality, combining the folding of the main frame with the storage of components. This allows for the efficient and orderly integration of detachable components such as the seat, footrest, and tray, resulting in an extremely compact, regular, and complete unit. Packaging simply requires placing this unit into a box or bag. This design delivers revolutionary space utilization, resulting in unprecedented reductions in packaging volume. It also demonstrates significant economic benefits in logistics and warehousing, drastically reducing costs while greatly enhancing the convenience of storage and organization for consumers. It is an innovative design that combines excellent practicality with outstanding commercial value.

[0204] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the content of this application's specification and drawings under the concept of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A folding dining chair, comprising a main frame, a seat (1), a footrest (2), and a tray (3) detachably connected to the main frame, the main frame comprising a front support (4), a rear support (5), and a backrest (6), characterized in that: The upper part of the front support (4), the upper part of the rear support (5), and the back frame (6) are connected by a linkage hinge mechanism. The linkage hinge mechanism is provided with a first rotation axis and a second rotation axis arranged at intervals. The main frame can be rotated and folded around the first rotation axis and the second rotation axis, so that the main frame can be transformed from an unfolded use state to a folded storage state. In the folded storage state, the rear support (5), the front support (4), and the back frame (6) are folded together and cooperate to form a receiving space (7), which is used to accommodate at least one of the seat (1), footrest (2), and plate (3) removed from the main frame.

2. The folding dining chair as described in claim 1, characterized in that: The linkage hinge mechanism includes a connector (8) and a locking mechanism; The connector (8) is fixedly installed on the upper part of the front support (4); the first position (81) of the connector (8) is hinged to the upper part of the rear support (5) to form the first rotation axis; the second position (82) of the connector (8) is hinged to the bottom of the back frame (6) to form the second rotation axis. When folded, the front support (4) rotates around the first rotation axis toward the rear support (5) until it abuts against the front support (4), and the back frame (6) rotates around the second rotation axis until it abuts against the front support (4); The locking mechanism is used to lock the front support (4), rear support (5) and back frame (6) in the unfolded use state.

3. The folding dining chair as described in claim 2, characterized in that: The front support (4) includes a pair of first strip members (41) spaced apart from each other on the left and right, and the two first strip members (41) are connected by at least one first connecting rod (42); The rear support (5) includes a pair of second strip members (51) spaced apart from each other on the left and right, and the two second strip members (51) are connected by at least one second connecting rod (52); The back frame (6) includes a pair of third strip members (61) spaced apart from each other on the left and right, and the two third strip members (61) are connected by a back plate (62); There are two connectors (8), which are respectively fixedly installed on the upper ends of the first strip member (41) on the left and right sides; The first position (81) of each of the connectors (8) is hinged to the upper end of the second strip member (51) on the same side; The second position (82) of each of the connectors (8) is hinged to the lower end of the third strip member (61) on the same side.

4. The folding dining chair as described in claim 2, characterized in that: The locking mechanism includes a slot (53) disposed on the top of the rear support (5) and a sliding member (63) movably disposed on the back frame (6); When the main frame is in the unfolded use state, the sliding member (63) is aligned with the slot (53). By inserting the sliding member (63) into the slot (53), the relative positions of the back frame (6), the front support (4) and the rear support (5) can be locked. The main frame can be folded by removing the slider (63) from the slot (53).

5. The folding dining chair as described in claim 4, characterized in that: It also features elastic elements; One end of the elastic element acts on the back frame (6), and the other end of the elastic element acts on the slider (63) to apply an elastic force to the slider (63) in the direction of insertion into the slot (53); When the main frame is in the unfolded use state and the sliding member (63) is aligned with the slot (53), the sliding member (63) is automatically inserted into the slot (53) under the drive of the elastic element.

6. The folding dining chair as described in claim 4 or 5, characterized in that: The slot (53) is a blind slot with an open top; Alternatively, the top and front of the slot (53) are open, the slider (63) is provided with a limiting groove (64), and the slot (53) is provided with a limiting strip. When the slider (63) is inserted into the slot (53), the limiting strip is inserted into the limiting groove (64) on the slider (63) to prevent the slider (63) from coming out of the front opening of the slot (53).

7. The folding dining chair as described in claim 2, characterized in that: The two ends of the connector (8) are respectively formed at the first position (81) and the second position (82); The top of the connector (8) forms a cone-shaped portion (83), the cone-shaped portion (83) having a first mating surface (84) and a second mating surface (85); The rear support (5) can rotate around the first rotation axis, so that the upper part of the rear support (5) abuts against or moves away from the first mating surface (84); The back frame (6) can rotate around the second rotation axis, so that the bottom of the back frame (6) abuts against or moves away from the second mating surface (85); When the upper part of the rear support (5) abuts against the first mating surface (84) and the bottom of the back frame (6) abuts against the second mating surface (85), the main frame is in the unfolded use state.

8. The folding dining chair as described in claim 7, characterized in that: The upper part of the rear support (5) is provided with a groove (54) that is adapted to the partial shape of the connector (8); The groove (54) is provided with a positioning element (55); The connector (8) is provided with a corresponding positioning groove (86); A portion of the positioning member (55) is inserted into the positioning groove (86) and hinged, thereby achieving the hinge of the rear support (5) and the connecting member (8) at the first position (81); When the upper part of the rear support (5) abuts against the first mating surface (84), the positioning member (55) is accommodated in the positioning groove (86); When the upper part of the rear support (5) moves away from the second mating surface (85), a portion of the positioning member (55) exits the positioning groove (86).

9. The folding dining chair as described in claim 3, characterized in that: The plate (3) has two rearwardly extending connecting arms (31) on its rear side; The free end of the connecting arm (31) is provided with an upward-facing hook (32), and the outer bottom wall of the hook (32) is provided with a downward-protruding pressing part (33); The back plate (62) has an upper connecting part (65) and a lower connecting part (66) arranged at intervals on both sides, and the space between the upper connecting part (65) and the lower connecting part (66) allows the hook part (32) to extend into it. It is also provided with a support arm (9), the upper end of which is detachably connected and locked to the bottom of the plate (3), and the lower end of which is detachably connected and locked to the seat plate (1), so as to achieve secondary fixation of the plate (3) through the support arm (9).

10. The folding dining chair as described in claim 3, characterized in that: Each of the two first strip members (41) is movably provided with a first slide (43), the first slide (43) can reciprocate in the extension direction of the first strip member (41) and can be locked with the first strip member (41); Each of the two third strip members (61) is movably provided with a second slide (67), which can reciprocate along the extension direction of the third strip member (61) and can be locked with the third strip member (61); The left and right sides of the foot pedal (2) are respectively detachably connected and locked to the two first slides (43); The left and right sides of the seat (1) are detachably connected and locked to the two second slides (67).

11. The folding dining chair as described in claim 10, characterized in that: The inner sidewall of the first strip member (41) is provided with a guide groove (44) along its length direction; The first slide block (43) is fixedly provided with a slider (45) that is adapted to the shape of the guide groove (44). The slider (45) is movably embedded in the guide groove (44), so that the first slide block (43) and the first strip member (41) form a sliding fit. The inner wall of the guide groove (44) is provided with a plurality of first locking holes (46) spaced apart along the length direction of the first strip member (41); The first slide (43) is provided with a first locking key (47), a button (48) for operating the first locking key (47), and a first top spring; The first top spring applies a spring force to the first locking key (47) to move in the direction of the first lock hole (46); In its natural state, the first locking key (47) can be inserted into any of the first locking holes (46) of the guide groove (44) under the elastic force applied by the first top spring, thereby locking the first slide (43); Pressing the button (48) can drive the first locking key (47) to overcome the elastic force of the first top spring and push it out of the first lock hole (46), thereby releasing the lock on the first slide (43) and allowing the first slide (43) to slide along the guide groove (44).

12. The folding dining chair as described in claim 10, characterized in that: The first slide (43) has a plug-in position (49), and the foot pedal (2) has plug-in parts (21) on both sides that are adapted to the shape of the plug-in position (49). The foot pedal (2) is inserted into the plug-in position (49) of the first slide (43) through the plug-in part (21) to achieve a detachable connection. The side wall of the plug-in position (49) is provided with a second lock hole, and the foot pedal (2) is provided with a second locking key (22), a second top spring (23) and an unlocking component (24) that is linked with the second locking key (22); When the plug part (21) is inserted into the plug position (49) until the second locking key (22) is aligned with the second lock hole, under the elastic force of the second top spring (23), the second locking key (22) automatically slides into the second lock hole, thereby realizing the connection and locking between the foot pedal (2) and the first slide (43); Operating the unlocking component (24) can drive the second locking key (22) to overcome the elastic force of the second top spring (23) and exit the second lock hole, thereby allowing the foot pedal (2) to be pulled out and removed from the first slide (43).

13. The folding dining chair as described in claim 11 or 12, characterized in that: The sliding and locking mechanism between the second slide (67) and the third strip member (61) is the same as the sliding and locking mechanism between the first slide (43) and the first strip member (41); The detachable connection locking method between the seat (1) and the second slide (67) is the same as the detachable connection locking method between the foot pedal (2) and the first slide (43).

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