Folding chair frame and folding dining chair

Abstract

Provided in the embodiments of the present disclosure are a folding chair frame and a folding dining chair. The folding chair frame comprises a plurality of support leg rods and a plurality of connecting assemblies. The connecting assemblies are connected in one-to-one correspondence between each two adjacent support leg rods. Fixed hinge members and sliding hinge members are disposed on the support leg rods, the sliding hinge members are located between bottom ends of the support leg rods and the fixed hinge members, and the sliding hinge members can slide along the support leg rods. The connecting assemblies comprise pairs of cross bars arranged in a crossed manner, the cross bars are hinged to one another at crossing points, the top ends of the cross bars are hinged to the fixed hinge members on one side of the support leg rods, and the bottom ends of the cross bars are hinged to the sliding hinge members on the other side of the support leg rods. The bottom ends of the support leg rods are telescopically adjustable. In the present disclosure, in an unfolded state of the folding chair frame, the bottom ends of the support leg rods are still telescopically adjustable, so that the height of the folding chair frame can be flexibly adjusted, ensuring that the folding chair frame provided by the embodiments of the present disclosure can adapt to complex scenarios.

Description

Folding chair frame and folding dining chair

[0001] Cross-reference to Related Applications

[0002] The present disclosure claims priority to the Chinese patent application No. 202421565740.5, filed on July 03, 2024, entitled “Folding chair frame and folding dining chair”, the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of folding chairs, in particular, to a folding chair frame and a folding dining chair comprising the folding chair frame. BACKGROUND

[0004] In modern life, chairs are essential daily life furniture for people to rest and sit, avoiding the fatigue caused by long-term lying or standing, and reducing the energy consumption of long-term standing. Therefore, chairs are widely used in various training institutions, schools at all levels, public places, hospitals, restaurants, hotels, companies, families and other places for users to use.

[0005] Chairs have various structural designs, among which folding chairs, as a special structure of chairs, are not only convenient to carry and transport, but also can be folded during non-use time to reduce the occupied space. In addition, folding chairs are usually a combination structure of pipes and cloth, and the cloth chair surface can evenly distribute the load when the user sits, ensuring user comfort. Moreover, folding chairs can be provided with a backrest to improve comfort, or a dining tray can be installed for use as a child dining chair, which has excellent expandability.

[0006] However, the existing folding chairs often cannot flexibly adjust the seat height during use, and have poor adaptability to complex use scenarios. For example, when used as a child dining chair, the seat height cannot be flexibly adjusted in different eating situations, or the seat height cannot adapt to the height change of children.

[0007] Therefore, how to provide a folding dining chair that can flexibly adjust the seat height has become a technical problem to be solved in the field.

[0008] DISCLOSURE

[0009] The present disclosure aims to solve one of the technical problems in the related art to some extent. To this end, the present disclosure provides a folding chair frame, which can flexibly adjust the height and ensure the adaptability of the folding dining chair to complex scenarios.

[0010] To achieve the above object, in a first aspect, the disclosure provides a folding chair frame, comprising a plurality of support legs and a plurality of connecting assemblies, each of the connecting assemblies is connected between two adjacent support legs, the support leg is provided with a fixed hinge and a sliding hinge, the sliding hinge is located between the fixed hinge and the bottom end of the support leg, and the sliding hinge can slide along the support leg;

[0011] The connecting assembly comprises a pair of cross rods arranged in cross, the cross rods are hinged to each other at the cross, the top end of the cross rod is hinged to the fixed hinge on one side of the support leg, and the bottom end of the cross rod is hinged to the sliding hinge on the other side of the support leg; the bottom end of the support leg can be telescopic adjusted.

[0012] Optionally, the folding chair frame comprises four support legs and corresponding four connecting assemblies, wherein the length of the top of two adjacent support legs exceeding the fixed hinge part is greater than the length of the top of the other two support legs exceeding the fixed hinge part.

[0013] Optionally, the bottom end of the support leg is provided with a foot pad, the bottom of the foot pad has a ground contact plane, and the ground contact planes of the bottoms of the plurality of foot pads can be coplanar when the folding chair frame is opened.

[0014] Optionally, the material of the foot pad comprises plastic.

[0015] Optionally, the bottom of the foot pad has a plurality of anti-skid convex strips arranged in parallel.

[0016] Optionally, the support leg comprises a top pipe and a bottom pipe, the fixed hinge is arranged on the top pipe, the sliding hinge is slidingly arranged on the bottom pipe, the top end of the bottom pipe is sleeved on one of the bottom end of the top pipe and the other, and the top pipe and the bottom pipe can slide relative to each other along the extension direction of the bottom pipe.

[0017] Optionally, when the folding chair frame is opened, the bottom pipe can slide relative to the top pipe to abut the foot pad and the sliding hinge.

[0018] Optionally, the part of the top pipe above the fixed hinge is outwardly bent to form a vertical segment, and a plurality of the vertical segments are parallel to each other when the folding chair frame is opened.

[0019] Optionally, the length of the vertical segment of at least one pair of the top pipes is longer than the length of the vertical segment of the remaining top pipes, the top pipe with the longer vertical segment length is configured to fix a backrest pad, and the top end of the top pipe with the shorter vertical segment length is configured to fix a dinner plate.

[0020] Optionally, a locking mechanism is arranged on the support leg, and the locking mechanism is capable of selectively locking the relative position of the top pipe and the bottom pipe.

[0021] Optionally, the locking mechanism comprises an elastic detent structure arranged on one of the top pipe and the bottom pipe which is sleeved on the inner side, and one of the top pipe and the bottom pipe which is sleeved on the outer side is provided with a detent opening, the elastic detent structure is capable of being popped into the detent opening when the top pipe and the bottom pipe are relatively moved to a position where the detent opening corresponds to the elastic detent structure, so as to lock the relative position of the top pipe and the bottom pipe.

[0022] Optionally, the locking mechanism further comprises a gear adjusting assembly, the gear adjusting assembly comprises a mounting sleeve and an adjusting button, the mounting sleeve is sleeved on one of the top pipe and the bottom pipe which is sleeved on the outer side, the adjusting button is movably connected with the mounting sleeve, the position of the mounting sleeve corresponds to the position of the detent opening, and the adjusting button is capable of ejecting the elastic detent structure out of the detent opening when being pressed.

[0023] Optionally, a pin hole is formed on the side wall of the pipe on the inner side, the elastic detent structure comprises a spring and a spring pin, one end of the spring abuts against the inner wall of the pipe on the inner side, the other end of the spring is connected with the first end of the spring pin, and the spring is configured to drive the second end of the spring pin to be stretched out of the pipe on the inner side through the pin hole by elastic force.

[0024] Optionally, the locking mechanism comprises a stop bar and a stop assembly, the stop bar is arranged on one of the top pipe and the bottom pipe which is sleeved on the inner side, and the stop assembly is arranged on one of the top pipe and the bottom pipe which is sleeved on the outer side, the stop bar comprises a plurality of tooth portions distributed along the length direction of the top pipe, and the stop assembly is capable of selectively pressing on the plurality of tooth portions of the stop bar to block the stop bar.

[0025] Optionally, the stop assembly comprises a fixing member, a pressing member and a stop block, the fixing member is fixedly arranged on one of the top pipe and the bottom pipe which is sleeved on the outer side, the pressing member has a hinged portion and a pressing portion, the hinged portion is hinged with the fixing member, the stop block is arranged between the hinged portion and the stop bar, the hinged portion has a cam pressing surface on the side facing the stop block, and the distance between the cam pressing surface and the hinged shaft of the hinged portion gradually increases along the direction close to the pressing portion.

[0026] Optionally, the folding chair frame further comprises at least one support assembly, two ends of the support assembly are respectively hinged to the same side of the cross rods arranged in pairs along the height direction, and the support assembly can limit the maximum opening angle between the cross rods on the same side along the height direction.

[0027] Optionally, the support assembly comprises a connecting piece and a pair of hinged rods, first ends of the hinged rods are respectively hinged to opposite sides of the connecting piece, and second ends of the hinged rods are respectively hinged to the cross rods on both sides.

[0028] Optionally, a limiting groove is formed in the bottom of the connecting piece, the limiting groove is through along the extending direction thereof, the first ends of the hinged rods on both sides are hingedly arranged in the limiting groove, and the first ends of the hinged rods on both sides can rotate in the limiting groove, when the two hinged rods are in contact with the bottom surface of the limiting groove, the height of the connecting piece is lower than the height of the second ends of the hinged rods on both sides.

[0029] Optionally, first hinged holes are formed in the side walls on both sides of the limiting groove and extend to the outer surface of the connecting piece, the first ends of the hinged rods are formed with second hinged holes extending through the hinged rods along the radial direction, and the hinged rods are hingedly connected with the connecting piece through the hinged shafts penetrating through the first hinged holes and the second hinged holes.

[0030] Optionally, when the two hinged rods are in contact with the bottom surface of the limiting groove, the vertical segments of the top pipes are parallel to each other.

[0031] Optionally, folding handles are fixedly arranged on the plurality of fixed hinged pieces, and the folding handles are located outside the corresponding top pipes.

[0032] Optionally, the folding handles extend in the same direction as the bottom pipe.

[0033] Optionally, the folding chair frame further comprises a dining tray, and the dining tray is fixedly connected with the top ends of part of the support foot rods when the folding chair frame is opened.

[0034] Optionally, the bottom of the dining tray is provided with a plurality of matching sleeves, and the top ends of part of the support foot rods can be inserted into the plurality of matching sleeves one by one when the folding chair frame is opened.

[0035] Optionally, the bottom of the dining tray is further provided with a crotch guard, two ends of the crotch guard are hingedly connected with the bottom of the dining tray, the crotch guard can rotate relative to the dining tray about the axis passing through the two hinge points, and the center of the crotch guard protrudes away from the dining tray.

[0036] In a second aspect, the present disclosure provides a folding dining chair, which comprises a seat cushion, a dining plate and the folding chair frame as described above. The seat cushion is fixed on the plurality of support leg rods and can be unfolded when the folding chair frame is unfolded. The dining plate can be fixedly connected with the top end of part of the support leg rods when the folding chair frame is unfolded.

[0037] Optionally, the bottom of the dining plate is provided with a plurality of matching sleeves, and the top end of part of the support leg rods can be inserted into the plurality of matching sleeves one by one when the folding chair frame is unfolded.

[0038] Optionally, the bottom of the dining plate is further provided with a crotch support frame, both ends of the crotch support frame are hingedly connected with the bottom of the dining plate, and the crotch support frame can rotate relative to the dining plate about an axis passing through the two hinged positions. The folding dining chair further comprises a crotch cover and a connecting buckle, the crotch cover is sleeved on the crotch support frame, and the connecting buckle is connected between the crotch cover and the seat cushion.

[0039] Optionally, the folding dining chair further comprises a backrest cushion, the support leg rod comprises a top pipe and a bottom pipe, the fixed hinge is arranged on the top pipe, and the sliding hinge is slidingly arranged on the bottom pipe. The bottom pipe is sleeved on the bottom end of the top pipe and can slide relative to the top pipe along the extension direction of the bottom pipe. The part of the top pipe above the fixed hinge is outwardly bent to form a vertical segment, a plurality of the vertical segments are parallel to each other when the folding chair frame is unfolded, and the length of at least one pair of the vertical segments of the top pipe is longer than the length of the vertical segments of the remaining top pipes. The backrest cushion is fixed on the top pipe with the longer length of the vertical segment, and the dining plate can be fixedly connected with the top end of the top pipe with the shorter length of the vertical segment when the folding chair frame is unfolded.

[0040] Optionally, the folding dining chair further comprises a pair of guardrail pieces, and the two guardrail pieces are respectively connected between the vertical segment of the top pipe with the longer length and the vertical segment of the corresponding top pipe with the shorter length on both sides.

[0041] Optionally, the folding chair frame comprises four support leg rods and corresponding four connecting assemblies, wherein the length of the top part of two adjacent support leg rods beyond the fixed hinge part is greater than the length of the top part of the other two support leg rods beyond the fixed hinge part.

[0042] Compared with the prior art, the beneficial effects of the embodiments of the present disclosure include, for example:

[0043] In the folding chair frame and the folding dining chair provided by the embodiments of the present disclosure, the top end of the cross rod is hinged to the fixed hinge fixed on the support foot rod, the bottom end of the cross rod is hinged to the sliding hinge, and the cross rod is slidably arranged on the support foot rod through the sliding hinge. The bottom end of the support foot rod is telescopically adjustable, so that when the folding chair frame is unfolded and folded, the bottom end of the cross rod slides along the support foot rod as the angle between the pair of cross rods changes, and in the unfolded state of the folding chair frame, the position of the cross rod relative to the support foot rod is fixed, and at this time, the bottom end of the support foot rod is still telescopically adjustable to change the height of the support structure below the cushion, so that the height of the folding chair frame can be flexibly adjusted, and the adaptability of the folding chair using the folding chair frame provided by the present disclosure to complex scenes is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present disclosure, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0045] The present disclosure will be further described below in conjunction with the drawings:

[0046] FIG. 1 is a structural schematic diagram of a folding chair frame provided by an embodiment of the present disclosure;

[0047] FIG. 2 is a partial enlarged schematic diagram of the folding chair frame in area A in FIG. 1;

[0048] FIG. 3 is a partial enlarged schematic diagram of the folding chair frame in area B in FIG. 1.

[0049] FIG. 4 is a structural schematic diagram of one side of the folding chair frame provided by an embodiment of the present disclosure;

[0050] FIG. 5 is a structural schematic diagram of the other side of the folding chair frame provided by an embodiment of the present disclosure;

[0051] FIG. 6 is a top view schematic diagram of the folding chair frame provided by an embodiment of the present disclosure;

[0052] FIG. 7 is a structural schematic diagram of one side of the folding chair frame provided by an embodiment of the present disclosure in a folded state;

[0053] FIG. 8 is a structural schematic diagram of the other side of the folding chair frame provided by an embodiment of the present disclosure in a folded state;

[0054] FIG. 9 is a schematic diagram of the principle of installing a dining tray on the folding chair frame provided by an embodiment of the present disclosure;

[0055] FIG. 10 is a structural schematic diagram of the folding chair frame provided by an embodiment of the present disclosure in a low position state;

[0056] FIG. 11 is a structural schematic diagram of a folding dining chair according to an embodiment of the present disclosure;

[0057] FIG. 12 is a structural schematic diagram of a locking mechanism in a folding chair frame according to an embodiment of the present disclosure;

[0058] FIGS. 13-14 are schematic diagrams of a locking mechanism locking a stopper in a folding chair frame according to an embodiment of the present disclosure.

[0059] Legend: support leg 100; top pipe 110; vertical section 111; bottom pipe 120; foot pad 130; locking mechanism 140; mounting sleeve 141; adjustment button 142; connecting assembly 200; cross pipe 210; fixed hinge 300; sliding hinge 400; support assembly 500; connecting piece 510; hinged pipe 520; folding handle 600; dining tray 700; matching sleeve 710; guard crotch frame 720. DETAILED DESCRIPTION

[0060] Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings, in which the same or similar components have the same or similar designations and functions throughout various embodiments. Based on the embodiments, it is intended to explain the present disclosure, and cannot be understood as a limitation of the present disclosure.

[0061] In this specification, "one embodiment" or "an embodiment" or "example" or "exemplary" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the disclosure. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.

[0062] In the related art, the structure of a folding chair frame generally includes support leg pipes and a cross pipe structure connected between the support leg pipes, the bottom end of the cross pipe is hingedly connected to the bottom end of the support leg pipe, and the top end of the cross pipe is slidingly hingedly arranged on the support leg pipe, so that the dining chair is folded or unfolded by the contraction and opening action of the cross pipe. However, in this scheme, the top seat and the support leg pipe are in a hinged relationship, making it difficult to flexibly change the relative height between the top seat and the support leg pipe, and since the bottom end of the cross pipe is fixedly hingedly connected to the bottom end of the support leg pipe, the support leg pipe itself is also difficult to realize a telescopic design, resulting in that the seat of the folding chair frame can only be kept at a fixed height, and the use scene is single.

[0063] To solve the above technical problems, the folding chair frame provided by the embodiment of the present disclosure is shown in FIGS. 1-6, which comprises a plurality of support leg rods 100 and a plurality of connecting assemblies 200, each of the connecting assemblies 200 is connected between each two adjacent support leg rods 100, the support leg rod 100 is provided with a fixed hinge 300 and a sliding hinge 400, the sliding hinge 400 is located between the fixed hinge 300 and the bottom end of the support leg rod 100, and the sliding hinge 400 can slide along the support leg rod 100.

[0064] The connecting assembly 200 comprises a pair of cross rods 210 arranged in cross, the cross rods 210 are hinged to each other at the cross, the top end of the cross rod 210 is hingedly connected to the fixed hinge 300 on one side of the support leg rod 100, and the bottom end of the cross rod 210 is hingedly connected to the sliding hinge 400 on the other side of the support leg rod 100; the bottom end of the support leg rod 100 is telescopic adjustable.

[0065] In the folding chair frame provided by the embodiment of the present disclosure, the top end of the cross rod 210 is hinged to the fixed hinge 300 fixed on the support leg rod 100, the bottom end of the cross rod 210 is hinged to the sliding hinge 400 and is slidably arranged on the support leg rod 100 through the sliding hinge 400, and the bottom end of the support leg rod 100 is telescopic adjustable, so that when the folding chair frame is unfolded and folded, the bottom end of the cross rod 210 slides along the support leg rod 100 as the angle between the pair of cross rods 210 changes; and in the unfolded state of the folding chair frame, the cross rod 210 is fixed relative to the position of the support leg rod 100, at this time the bottom end of the support leg rod 100 is still telescopic adjustable to change the height of the support structure below the cushion, so that the height of the folding chair frame can be flexibly adjusted (for example, it can be shrunk from the state shown in FIG. 1 to the state shown in FIG. 10), which ensures the adaptability of the folding chair (for example, a folding dining chair) using the folding chair frame provided by the embodiment of the present disclosure to complex scenes.

[0066] It can be understood that the top end of the support leg rod 100 can be configured to fix the cushion, for example, when the folding chair frame comprises four support leg rods 100, the cushion can be in the shape of a rectangle and provided with a hole structure at the four corners to fix the cushion by sleeving the top end of the four support leg rods 100. The shape of the cushion can also be designed as a circle or other shapes, which are not limited here.

[0067] Optionally, as shown in FIGS. 1-10, the folding chair frame comprises four support leg rods 100 and corresponding four connecting assemblies 200, wherein the length of the top portion of two adjacent support leg rods 100 exceeding the fixed hinge 300 is greater than the length of the top portion of the other two support leg rods 100 exceeding the fixed hinge 300. Of course, the folding chair frame can also comprise two, three, five, six or more support leg rods 100, and the number of support leg rods 100 is not limited as long as the folding chair frame can be stably placed. The length of the top portion of each support leg rod 100 exceeding the fixed hinge 300 is determined according to actual use requirements and is not limited herein, including but not limited to the specific designs mentioned above.

[0068] In the embodiments of the present disclosure, the folding chair frame comprises two top-end longer support leg rods 100 and two top-end shorter support leg rods 100, the two top-end longer support leg rods 100 can be configured to support the backrest, and the two top-end shorter support leg rods 100 can be configured to fix the auxiliary structure such as the dining tray. The length of the top end of the support leg rod 100 is determined according to actual use requirements or specific connection structure and is not limited herein.

[0069] In order to improve the stability of the standing posture of the folding chair frame, optionally, as shown in FIGS. 1-6, the bottom end of the support leg rod 100 is provided with a foot pad 130, the bottom of the foot pad 130 has a ground contact plane, and the ground contact planes of the bottoms of the plurality of foot pads 130 can be coplanar when the folding chair frame is opened.

[0070] Optionally, the material of the foot pad 130 includes plastic. Of course, the foot pad 130 can also be made of rubber, silicone or other materials, and different materials can be selected according to specific use requirements such as anti-skid, wear-resistant, floor protection and silence, and the like, and the present disclosure is not limited herein.

[0071] Optionally, the bottom of the foot pad 130 in the present embodiment has a plurality of parallel anti-skid protrusions to ensure the roughness of the bottom of the foot pad 130 and further ensure the stability of the standing posture of the folding chair frame. Of course, other anti-skid structures can also be provided on the foot pad 130, and the present disclosure is not limited herein.

[0072] Optionally, as shown in FIGS. 1-6, the support leg rod 100 comprises a top pipe 110 and a bottom pipe 120, the fixed hinge 300 is arranged on the top pipe 110, the sliding hinge 400 is slidingly arranged on the bottom pipe 120, one of the top end of the bottom pipe 120 and the bottom end of the top pipe 110 is sleeved on the other (as shown in the figure, the bottom pipe 120 is sleeved on the outside of the top pipe 110), and the bottom pipe 120 and the top pipe 110 can slide relative to each other along the extension direction of the bottom pipe 120, thereby realizing the telescopic movement of the bottom end of the support leg rod 100.

[0073] Optionally, as shown in FIG. 10, when the folding chair frame is unfolded, the bottom pipe 120 can slide relative to the top pipe 110 until the foot pad 130 abuts against the sliding hinge 400.

[0074] It can be understood that, in the case that the bottom pipe 120 can slide until the foot pad 130 abuts against the sliding hinge 400 when unfolded, when the folding chair frame is folded, as the sliding hinge 400 slides downward along the support leg 100, the foot pad 130 will also be driven downward by the sliding hinge 400, causing the bottom pipe 120 to expand downward, and thus causing the support leg 100 to automatically lengthen when folded (as shown in FIGS. 7 and 8).

[0075] Optionally, as shown in FIGS. 1-5, the portion of the top pipe 110 above the fixed hinge 300 is bent outward to form a vertical segment 111, and a plurality of vertical segments 111 are parallel to each other when the folding chair frame is unfolded. The plurality of vertical segments 111 can also not be parallel to each other, but can be arranged in a cross shape or other positional relationship, which is determined according to actual use requirements and is not limited herein.

[0076] Optionally, as shown in FIGS. 1-5, at least one pair of vertical segments 111 of the top pipe 110 are longer than the vertical segments 111 of the remaining top pipes 110, and the top pipe 110 with longer vertical segments 111 is configured to fix the back pad, and the top end of the top pipe 110 with shorter vertical segments 111 is configured to fix the dining tray 700. The length of each vertical segment 111 is determined according to actual use requirements and is not limited herein.

[0077] To improve user comfort, optionally, as shown in FIGS. 1-5, the support leg 100 is provided with a locking mechanism 140, which can selectively lock the relative position of the top pipe 110 and the bottom pipe 120, so that after the user pulls the bottom pipe 120 downward, the relative position of the top pipe 110 and the bottom pipe 120 can be locked by the locking mechanism 140 to ensure the stability of the height of the dining chair, and when it is necessary to lower the height of the dining chair, the locking mechanism 140 is opened to allow the support leg 100 to contract.

[0078] Optionally, the locking mechanism 140 includes a resilient detent structure, which is provided on one of the top pipe 110 and the bottom pipe 120 that is sleeved on the inner side, and the other of the top pipe 110 and the bottom pipe 120 that is sleeved on the outer side has a detent opening. The resilient detent structure can be popped into the detent opening when the top pipe 110 and the bottom pipe 120 move relatively to the position where the detent opening corresponds to the resilient detent structure, so as to lock the relative position of the top pipe 110 and the bottom pipe 120, thereby keeping the support leg 100 in an extended state and ensuring the structural stability of the folding chair frame at a high position. When it is necessary to fold the bottom pipe 120 to lower the height of the dining chair, the user only needs to press the resilient detent structure to allow the support leg 100 to contract.

[0079] To improve the user's comfort, the locking mechanism 140 can optionally further include a gear adjustment assembly disposed on the bottom tube 120 (as shown in the figure, the bottom tube 120 is sleeved on the outside of the top tube 110, and the gear adjustment assembly is disposed on the bottom tube 120), which includes a mounting sleeve 141 and an adjustment button 142. The mounting sleeve 141 is sleeved on one of the top tube 110 and the bottom tube 120 that is sleeved on the outside, and the adjustment button 142 is movably connected with the mounting sleeve 141. The position of the mounting sleeve 141 corresponds to the position of the clamping opening, and the adjustment button 142 can push the elastic clamping structure out of the clamping opening when pressed.

[0080] In the embodiments of the present disclosure, the locking mechanism 140 further includes a gear adjustment assembly disposed on the outer tube, which includes a mounting sleeve 141 and an adjustment button 142. Therefore, when the user needs to shorten the support leg 100 to adjust the folding chair frame to a low position, the elastic clamping structure can be indirectly pressed by the adjustment button 142, which ensures the comfort of the user's fingers and improves the user experience.

[0081] Optionally, a pin hole is formed on the sidewall of the inner tube, and the elastic clamping structure includes a spring and a pin. One end of the spring abuts against the inner wall of the inner tube, and the other end of the spring is connected with the first end of the pin. The spring is configured to drive the second end of the pin to extend out of the inner tube through the pin hole by the elastic force. The elastic clamping structure can also be designed in other forms, which are not limited herein.

[0082] Optionally, as shown in FIG. 12, the locking mechanism 140 includes a stop bar and a stop assembly 144. The stop bar is disposed on one of the top tube 110 and the bottom tube 120 that is sleeved on the inside, and the stop assembly 144 is disposed on one of the top tube 110 and the bottom tube 120 that is sleeved on the outside. The stop bar includes a plurality of tooth portions 143 distributed along the length direction of the top tube 110, and the stop assembly 144 can selectively press on the plurality of tooth portions 143 of the stop bar to block the stop bar from passing through, thereby locking the length of the support leg 100. Of course, the locking mechanism 140 can also be designed in other forms as long as it can achieve locking, which are not limited herein.

[0083] Optionally, as shown in FIG. 12, the tooth portion 143 is designed such that the included angle between the surface on the side of the stretching direction and the axis of the top tube 110 is smaller than the included angle between the surface on the side of the contraction direction and the axis of the top tube 110. Therefore, when the support leg 100 bears a load, a greater friction force can be generated to prevent the support leg 100 from contracting, thereby ensuring the stability of the dining chair in use.

[0084] Optionally, as shown in FIG. 12, the stop assembly 144 comprises a fixing member 1441, a pressing member 1442 and a stop block 1443, the fixing member 1441 is fixedly arranged on one of the top pipe 110 and the bottom pipe 120 which is arranged outside, the pressing member 1442 has a hinged part 1444 and a pressing part 1445, the hinged part 1444 is hinged with the fixing member 1441, the stop block is arranged between the hinged part 1444 and the stop bar, the hinged part 1444 has a cam pressing surface 1446 on the side towards the stop block 1443, and the distance between the cam pressing surface 1446 and the hinged shaft of the hinged part 1444 gradually increases along the direction towards the pressing part 1445.

[0085] When it is needed to lock the length of the support leg 100, as shown in FIGS. 13-14, the user can press the pressing part 1445 of the pressing member 1442, so that the part of the cam pressing surface 1446 on the side towards the pressing part 1445 rotates to contact the stop block 1443, thereby pressing the stop block 1443 towards the toothed part 143, and locking the relative position between the top pipe 110 and the bottom pipe 120 by the friction between the stop block 1443 and the toothed part 143. When it is needed to adjust the height of the folding chair, the user only needs to pull away the pressing part 1445 to unlock the locking mechanism 140 and allow the support leg 100 to freely contract.

[0086] Of course, the stop assembly 144 can also be designed in other structural forms, which are not limited herein, as long as it can lock the support leg 100 after it is extended to the specified length.

[0087] Optionally, the fixing member 1441 is arranged on one of the top pipe 110 and the bottom pipe 120 which is arranged outside. For example, in the case that the bottom pipe 120 is arranged outside the top pipe 110, as shown in FIG. 12, the fixing member 1441 is arranged on the top end of the bottom pipe 120.

[0088] To further ensure the stability of the folding chair frame in the open state, optionally, as shown in FIGS. 1, 3, 5 and 6, the folding chair frame further comprises at least one support assembly 500, both ends of the support assembly 500 are respectively hinged with the same side of the height direction of the pair of cross rods 210, and the support assembly 500 can limit the maximum opening angle between the same side of the height direction of the cross rods 210, thereby limiting the maximum opening angle of the folding chair frame.

[0089] Optionally, as shown in FIGS. 1, 3, 5 and 6, the support assembly 500 comprises a connecting member 510 and a pair of hinged rods 520, the first ends of the hinged rods 520 are respectively hinged with the opposite sides of the connecting member 510, and the second ends of the hinged rods 520 are respectively hinged with the cross rods 210 on both sides. Of course, the support assembly 500 can also be designed in other structural forms, which are not limited herein.

[0090] Optionally, as shown in FIG. 3, the bottom of the connecting piece 510 forms a limiting groove, the limiting groove penetrates along the extension direction thereof, the first ends of the two hinged rods 520 are hingedly arranged in the limiting groove, and the first ends are capable of rotating in the limiting groove; when the two hinged rods 520 are in contact with the bottom surface of the limiting groove, the height of the connecting piece 510 is lower than the height of the second ends of the two hinged rods 520.

[0091] In the embodiments of the present disclosure, the bottom of the connecting piece 510 has a limiting groove, as the folding chair frame is unfolded, the position of the connecting piece 510 falls, and after the support assembly 500 is unfolded, the connecting piece 510 is lowered to the lowest height, at which time the top surface of the hinged rod 520 is in abutment with the end edge of the bottom surface of the limiting groove, thereby avoiding reverse folding of the support assembly 500. Moreover, the connecting piece 510 is naturally maintained at the lowest position under the action of gravity, so that the support assembly 500 cannot be automatically retracted, and only when the user actively pulls the hinged rod 520 upward can the support assembly 500 be normally folded, thereby the entire folding chair frame is folded, further ensuring the stability of the folding chair frame in the unfolded state.

[0092] Optionally, as shown in FIG. 3, the two side walls at the two ends of the limiting groove each form a first hinged hole penetrating to the outer surface of the connecting piece 510, and the first end of the hinged rod 520 forms a second hinged hole penetrating the hinged rod 520 in the radial direction, and the hinged rod 520 is hingedly connected with the connecting piece 510 through a hinged shaft penetrating the first hinged hole and the second hinged hole.

[0093] Optionally, as shown in FIG. 1 and FIG. 5, when the two hinged rods 520 are in contact with the bottom surface of the limiting groove, the vertical segments 111 of the plurality of top pipes 110 are parallel to each other.

[0094] Optionally, as shown in FIG. 1 to FIG. 5, the plurality of fixed hinges 300 are fixedly provided with folding handles 600, and the folding handles 600 are located on the outer side of the corresponding top pipe 110, so that the user can drive the entire folding chair frame to fold by folding the two folding handles 600 inward, thereby reducing the risk of the user being pinched when contacting the rod groups of each part, and improving the use safety and use experience of the user.

[0095] Optionally, as shown in FIG. 1 to FIG. 5, the folding handle 600 extends in the same direction as the bottom pipe 120.

[0096] Optionally, as shown in FIG. 1 to FIG. 7, FIG. 9 and FIG. 10, the folding chair frame further comprises a dining tray 700, and the dining tray 700 is capable of being fixedly connected with the top end of part of the support leg rods 100 when the folding chair frame is unfolded.

[0097] Optionally, as shown in FIG. 1 to FIG. 5, the bottom of the dining tray 700 has a plurality of matching sleeves 710, and the top end of part of the support leg rods 100 can be inserted into the plurality of matching sleeves 710 one by one when the folding chair frame is unfolded.

[0098] Optionally, the inner wall of the fitting sleeve 710 is provided with an elastic clamping member, as shown in FIG. 7, the top end of the support leg 100 is provided with a contraction portion 112 and a hemispherical portion 113, the contraction portion 112 is connected between the vertical segment 111 and the hemispherical portion 113, the cross-sectional dimension of the contraction portion 112 is smaller than the cross-sectional dimension of the vertical segment 111 and the maximum cross-sectional dimension of the hemispherical portion 113, and the elastic clamping member can enter the gap between the vertical segment 111 and the hemispherical portion 113 and abut against the contraction portion 112 after the hemispherical portion 113 enters the fitting sleeve 710, so as to clamp and fix the top end of the support leg 100 in the fitting sleeve 710, thereby ensuring the stability of the position of the tray 700.

[0099] In order to improve the safety of the children using the dining chair, optionally, as shown in FIGS. 1 to 5, the bottom of the tray 700 is further provided with a crotch guard 720, both ends of the crotch guard 720 are hingedly connected with the bottom of the tray 700, and the crotch guard 720 can rotate relative to the tray 700 about the axis passing through the two hinge connection positions, the center of the crotch guard 720 protrudes away from the tray 700, and in the use state, the crotch guard 720 at the bottom of the tray 700 can be configured to be connected with the seat cushion, so as to block the crotch of the child, and prevent the child's body from sliding out of the dining chair from the bottom of the tray 700. Specifically, as shown in FIG. 11, the crotch guard sleeve 721 sleeved on the crotch guard 720 can be connected with the seat cushion through the connecting buckle 722, and the legs of the child can extend out from both sides of the crotch guard 720 and the connecting buckle 722.

[0100] In the second aspect, the embodiments of the present disclosure provide a folding dining chair, as shown in FIG. 11, the folding dining chair comprises a seat cushion 810, a tray 700 and a front folding chair frame, the seat cushion 810 is fixed on a plurality of support legs 100 and can be expanded when the folding chair frame is opened, and the tray 700 can be fixedly connected with the top end of part of the support legs 100 when the folding chair frame is opened.

[0101] In the folding dining chair provided by the present disclosure, the top end of the cross rod 210 is hingedly connected with the fixed hinge member 300 fixed on the support leg 100, the bottom end of the cross rod 210 is hingedly connected with the sliding hinge member 400 and is slidably arranged on the support leg 100 through the sliding hinge member 400, and the bottom end of the support leg 100 is telescopically adjustable, so that when the folding dining chair is opened and folded, the bottom end of the cross rod 210 slides along the support leg 100 with the change of the angle between the pair of cross rods 210, and in the state that the folding chair frame is opened, the position of the cross rod 210 relative to the support leg 100 is fixed, and at this time, the bottom end of the support leg 100 is still telescopically adjustable to change the height of the support structure below the seat cushion 810, so that the height of the seat cushion 810 of the folding dining chair can be flexibly adjusted, thereby ensuring the adaptability of the folding dining chair to complex scenes.

[0102] Optionally, as shown in FIGS. 1-5, the bottom of the tray 700 has a plurality of matching sleeves 710, and the top ends of the folding chair frame when unfolded can be inserted into the plurality of matching sleeves 710 one by one.

[0103] To improve the safety of children using the folding chair, optionally, as shown in FIGS. 1-5, the bottom of the tray 700 is further provided with a crotch support 720, both ends of the crotch support 720 are hingedly connected to the bottom of the tray 700, and the crotch support 720 can rotate relative to the tray 700 about an axis passing through the two hinge points, as shown in FIG. 11, the folding chair further comprises a crotch cover 721 and a connecting buckle 722, the crotch cover 721 is sleeved on the crotch support 720, and the connecting buckle 722 is connected between the crotch cover 721 and the seat cushion 810.

[0104] Optionally, the folding chair further comprises a backrest cushion 820, as shown in FIGS. 1-5, the support leg 100 comprises a top pipe 110 and a bottom pipe 120, the fixed hinge 300 is arranged on the top pipe 110, the sliding hinge 400 is slidingly arranged on the bottom pipe 120, the bottom pipe 120 is sleeved on the bottom end of the top pipe 110 and can slide relative to the top pipe 110 along the extension direction of the bottom pipe 120. The part of the top pipe 110 above the fixed hinge 300 is outwardly bent to form a vertical section 111, a plurality of vertical sections 111 are parallel to each other when the folding chair frame is unfolded, and the length of the vertical section 111 of at least one pair of top pipes 110 is longer than the length of the vertical section 111 of the remaining top pipes 110; as shown in FIG. 11, the backrest cushion 820 is fixed on the top pipe 110 with a longer vertical section 111, and the tray 700 can be fixedly connected with the top end of the top pipe 110 with a shorter vertical section 111 when the folding chair frame is unfolded.

[0105] Optionally, as shown in FIG. 11, the backrest cushion 820 and the seat cushion 810 are connected as a whole. The backrest cushion 820 and the seat cushion 810 can also be provided separately or can be detachably connected, which is not limited here.

[0106] Optionally, as shown in FIG. 11, the folding chair further comprises a pair of guard pieces 830, the two guard pieces 830 are respectively connected between the vertical section 111 of the longer top pipe 110 on both sides and the vertical section 111 of the corresponding shorter top pipe 110, and the guard pieces 830 can be protected on both sides of the seat cushion 810, further improving the safety of children eating.

[0107] Optionally, as shown in FIG. 11, the guard pieces 830 and the backrest cushion 820 are connected as a whole.

[0108] Optionally, as shown in FIGS. 1-5, the folding chair frame includes four support leg rods 100 and corresponding four connecting assemblies 200, wherein the length of the top of two adjacent support leg rods 100 exceeding the fixed hinge 300 part is greater than the length of the top of the other two support leg rods 100 exceeding the fixed hinge 300 part, and the dinner plate 700 can be fixed at the top of the two support leg rods 100 with shorter length when the folding chair frame is opened, and the backrest cushion can be fixed on the two support leg rods 100 with longer length when the folding chair frame is opened.

[0109] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and those skilled in the art should understand that the present disclosure includes but is not limited to the contents described in the above specific embodiment and the accompanying drawings. Any modification that does not deviate from the functional and structural principles of the present disclosure will be included in the scope of the claims. Industrial applicability

[0110] In summary, the folding chair frame and the folding chair provided by the embodiments of the present disclosure have the following advantages: the position of the cross rod and the support leg rod is relatively fixed when the folding chair frame is opened, and the bottom end of the support leg rod can still be adjusted in length at this time to change the height of the support structure below the seat cushion, so that the height of the folding chair frame can be flexibly adjusted, and the adaptability of the folding chair with the folding chair frame to complex scenes is ensured.

Claims

1. [Rule 91 Correction 15.07.2025] A folding chair frame characterized in that, The folding chair frame comprises a plurality of support leg rods and a plurality of connecting assemblies, each of the connecting assemblies is connected between two adjacent support leg rods, the support leg rod is provided with a fixed hinge and a sliding hinge, the sliding hinge is located between the fixed hinge and the bottom end of the support leg rod, and the sliding hinge can slide along the support leg rod; The connecting assembly comprises a pair of cross rods arranged in cross, the cross rods are hingedly connected at the cross, the top end of the cross rod is hingedly connected with the fixed hinge on one side of the support leg rod, and the bottom end of the cross rod is hingedly connected with the sliding hinge on the other side of the support leg rod; the bottom end of the support leg rod is telescopic adjustable.

2. [Amended according to Rule 91 on 15.07.2025] The folding chair frame according to claim 1, characterized in that, The support leg rod comprises a top pipe and a bottom pipe, the fixed hinge is arranged on the top pipe, the sliding hinge is arranged on the bottom pipe, the top end of the bottom pipe is sleeved on one of the bottom end of the top pipe, and the top pipe and the bottom pipe can slide relative to each other along the extension direction of the bottom pipe.

3. [Amended according to Rule 91 on 15.07.2025] The folding chair frame according to claim 2, characterized in that, The support leg rod is provided with a locking mechanism, and the locking mechanism can selectively lock the relative position of the top pipe and the bottom pipe.

4. [Amended according to Rule 91 on 15.07.2025] The folding chair frame according to claim 3, characterized in that, The locking mechanism comprises a resilient detent structure arranged on one of the top pipe and the bottom pipe sleeved on the inside, and the other of the top pipe and the bottom pipe sleeved on the outside has a detent opening, the resilient detent structure can be popped into the detent opening when the top pipe and the bottom pipe move relatively to the position corresponding to the detent opening, so as to lock the relative position of the top pipe and the bottom pipe.

5. [Amended according to Rule 91 on 15.07.2025] The folding chair frame according to claim 4, characterized in that, A pin hole is formed in the side wall of the pipe on the inside; the resilient detent structure comprises a spring and a spring pin, one end of the spring abuts against the inner wall of the pipe on the inside, the other end of the spring is connected with the first end of the spring pin, and the spring is configured to drive the second end of the spring pin to extend out of the pipe on the inside through the elastic force.

6. [Amended according to Rule 91 on 15.07.2025] The folding chair frame according to claim 4 or 5, characterized in that, The locking mechanism further comprises a gear adjusting assembly, the gear adjusting assembly comprises a mounting sleeve and an adjusting button, the mounting sleeve is sleeved on one of the top pipe and the bottom pipe sleeved on the outside, the adjusting button is movably connected with the mounting sleeve, the position of the mounting sleeve corresponds to the position of the detent opening, and the adjusting button can push the resilient detent structure out of the detent opening when being pressed.

7. [Amended according to Rule 91 on 15.07.2025] The folding chair frame according to claim 3, characterized in that, The locking mechanism comprises a stop bar and a stop assembly, the stop bar is arranged on one of the top pipe and the bottom pipe sleeved on the inside, the stop assembly is arranged on the other of the top pipe and the bottom pipe sleeved on the outside, the stop bar comprises a plurality of teeth distributed along the length direction of the top pipe, and the stop assembly can be selectively pressed on the plurality of teeth of the stop bar to block the stop bar.

8. [Amended according to Rule 91 on 15.07.2025] The folding chair frame according to claim 7, characterized in that, The stopper assembly comprises a fixing member, a pressing member and a stopper block, the fixing member is fixedly arranged on one of the top pipe and the bottom pipe which is sleeved on the outside, the pressing member has a hinged part and a pressing part, the hinged part is hinged with the fixing member, the stopper block is arranged between the hinged part and the stopper bar, the hinged part has a cam pressing surface on the side towards the stopper block, the distance between the cam pressing surface and the hinged shaft of the hinged part gradually increases along the direction close to the pressing part.

9. [Amended according to Rule 91 on 15.07.2025] The folding chair frame according to any one of claims 2 to 8, characterized in that, The part of the top pipe above the fixed hinge member is outwardly bent to form a vertical section, and a plurality of vertical sections are parallel to each other when the folding chair frame is unfolded.

10. [Amended according to Rule 91 on 15.07.2025] The folding chair frame according to any one of claims 1 to 9, characterized in that, The folding chair frame further comprises at least one support assembly, both ends of the support assembly are respectively hinged with the same side of the cross rods arranged in pairs in the height direction, and the support assembly can limit the maximum opening angle between the same side of the cross rods in the height direction.

11. [Amended according to Rule 91 on 15.07.2025] The folding chair frame according to claim 10, characterized in that, The support assembly comprises a connecting member and a pair of hinged rods, the first ends of the hinged rods are respectively hinged with the opposite sides of the connecting member, and the second ends of the hinged rods are respectively hinged with the cross rods on both sides.

12. [Amended according to Rule 91 on 15.07.2025] The folding chair frame according to claim 11, characterized in that, The bottom of the connecting member forms a limiting groove, the limiting groove is through in the extending direction thereof, the first ends of the hinged rods on both sides are hingedly arranged in the limiting groove and can rotate in the limiting groove, and in the case that both the hinged rods contact with the bottom surface of the limiting groove, the height of the connecting member is lower than the height of the second ends of the hinged rods on both sides.

13. [Amended according to Rule 91 on 15.07.2025] The folding chair frame according to claim 12, characterized in that, First hinged holes are formed on both sides of the side walls at both ends of the limiting groove and penetrate to the outer surface of the connecting member, the first ends of the hinged rods form second hinged holes penetrating the hinged rods in the radial direction, and the hinged rods are hingedly connected with the connecting member through the hinged shafts penetrating the first hinged holes and the second hinged holes.

14. [Amended according to Rule 91 on 15.07.2025] The folding chair frame according to any one of claims 1 to 13, characterized in that, A plurality of folding handles are fixedly arranged on the fixed hinge members.

15. [Amended according to Rule 91 on 15.07.2025] The folding chair frame according to any one of claims 1 to 14, characterized in that, The folding chair frame further comprises a dining tray, the dining tray is fixedly connected with the top ends of part of the support foot rods when the folding chair frame is unfolded, and the bottom of the dining tray has a plurality of matching sleeves, the top ends of part of the support foot rods can be inserted into the matching sleeves one by one when the folding chair frame is unfolded.

16. [Amended according to Rule 91 on 15.07.2025] The folding chair frame according to claim 15, characterized in that, An elastic clamping member is arranged on the inner wall of the matching sleeve, and the elastic clamping member is configured to clamp and fix the top end of the support foot rod in the matching sleeve.

17. [Amended according to Rule 91 on 15.07.2025] A folding chair, characterized in that, The folding dining chair comprises a seat cushion, a dining tray and the folding chair frame according to any one of claims 1 to 16, the seat cushion is fixed on a plurality of support foot rods and can be unfolded when the folding chair frame is unfolded, and the dining tray can be fixedly connected with the top ends of part of the support foot rods when the folding chair frame is unfolded.

18. [Amended according to Rule 91 on 15.07.2025] The folding chair according to claim 17, characterized in that, The bottom of the dining tray is further provided with a crotch guard, and both ends of the crotch guard are hinged with the bottom of the dining tray.

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