A toy chair

Abstract

A toy chair, including a seat plate and two groups of detachable plug-in support legs, the support legs are combined to form an inverted U-shaped support frame, matched with an arc transition section and an upper arched arch beam, to build a stable and dispersed force transmission structure. The utility model sets up the clamping groove and the clamping piece preposition structure cooperation elastic locking assembly, realizes the tool-free quick disassembly and the gap locking and prevents the escape. The core stress area is provided with a reinforcing cavity, and the cavity is provided with a cross asymmetric reinforcing rib, the stress concentration area of the rib root is staggered, and the multi-angle composite stress working condition of children is adapted. At the same time, a plurality of reinforcing ribs are matched to optimize the overall structural strength. The utility model effectively improves the vertical bearing capacity and lateral anti-toppling capacity of the chair, and has the convenience of disassembly, structural stability and fatigue resistance under the premise of lightweight, and the practicality and safety are significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of toy technology, and in particular to a toy chair. Background Technology

[0002] Children's toy chairs are common household items for children to play and rest. Their structural stability and load-bearing strength are directly related to children's safety. Both domestic and international standards have established strict toy safety testing standards, and relevant safety performance requirements are mandatory entry conditions for products to be sold on the market.

[0003] Currently, most toy chairs on the market suffer from structural design flaws and insufficient assembly sturdiness. Most products use a method of assembling multiple parts piece by piece, simple splicing, or single-point screw fixing, resulting in large gaps between parts, weak locking and clamping effects, and uneven overall stress distribution. Under typical usage scenarios such as children sitting on them, rocking, or leaning against them, parts are prone to loosening, shifting, and deformation, and in severe cases, the entire chair may fall apart, failing to meet safety standards for stability and load-bearing capacity.

[0004] Constrained by shortcomings in structural design and assembly processes, the proportion of products in the industry that pass high-level safety tests is generally low. While there are numerous mass-produced toy chair models on the market, only a small number can meet high-standard safety tests, and products that can simultaneously meet the stringent testing requirements of both domestic and international markets are even rarer. Many products fail to pass core testing items such as overload capacity, front-to-back tilt stability, and structural impact resistance due to insufficient structural stability. This not only fails to meet market compliance requirements but also poses serious safety risks, limiting product quality improvement and expansion into domestic and international markets.

[0005] In existing technologies, the common methods used in the industry to improve the stability of toy chairs are to add supporting parts, thicken raw materials, and add auxiliary support legs. These improvements increase production costs, add assembly steps, and lead to problems such as cumbersome assembly, increased product weight, and large storage space requirements. Furthermore, simply reinforcing the surface structure cannot fundamentally optimize the overall stress system, and the product still struggles to pass various levels of high-standard stability and strength safety tests.

[0006] Therefore, in response to the industry's shortcomings such as poor stability, complex assembly process, and substandard safety performance of existing products, there is an urgent need in this field to develop a toy chair with a simplified structure, convenient assembly and disassembly, balanced force distribution, outstanding stability performance, and the ability to simultaneously adapt to more stringent safety testing requirements, thereby solving various pain points of existing products. Utility Model Content

[0007] To overcome the shortcomings of existing technologies, this utility model provides a toy chair that uses a pre-positioning structure and an elastic locking component to form a dual plug-in locking system. It is also equipped with an inverted U-shaped arched support frame and a hierarchical reinforcing rib network. The two systems work together to achieve tool-free quick assembly and disassembly, and the connection is not easy to loosen. Furthermore, it effectively disperses multi-directional loads and reduces stress concentration. Under the premise of controlling the product wall thickness and maintaining lightweight, it significantly improves the load-bearing capacity and anti-tipping performance.

[0008] Specifically, this utility model provides a toy chair, including a seat and two sets of support legs that are detachably plugged into the bottom of the seat. The support legs are integrally formed support components, including a head, two legs and a crossbeam; the two legs are symmetrically arranged on both sides of the head, and the crossbeam connects the lower ends of the two legs. The head and the seat are provided with a pre-positioning structure that cooperates with each other. The pre-positioning structure includes a slot in the head and a positioning piece on the bottom surface of the seat that can be fitted into the slot. An elastic locking component is also provided between the inner side of the head or support leg and the seat, the elastic locking component being used to lock and limit the support leg and seat after they are inserted. The two legs together form an inverted U-shaped support frame, with an arc-shaped transition section at the bottom of the legs, and the crossbeam is constructed as an upward-arching arch.

[0009] Preferably, the elastic locking assembly includes a mutually cooperating elastic locking block and a locking jaw; The head or outrigger extends into the inner side to form a first connecting piece, and the elastic locking block is disposed on the first connecting piece; The bottom surface of the seat extends downward to form a second connecting piece, and the locking slot is opened on the second connecting piece; When the support leg and seat are connected and assembled, the first connecting piece and the second connecting piece fit together, and the elastic locking block and the locking port form a locking engagement.

[0010] Preferably, the first connecting piece and the outer wall of the seat form an accommodating space, the locking piece is arranged in the accommodating space, and the accommodating space covers the outer side of the head of the support leg.

[0011] Preferably, the first connecting piece and the second connecting piece are joined together to form a reinforced cavity; The reinforced cavity is provided with intersecting first and second reinforcing ribs; The first reinforcing rib is connected to a first connecting piece or a second connecting piece at both ends, and the end of the second reinforcing rib is connected to another connecting piece.

[0012] Preferably, the first reinforcing rib and the second reinforcing rib are arranged in a non-right-angle intersection.

[0013] Preferably, the second connecting piece and the outer wall of the seat plate form a third reinforcing cavity, and a third reinforcing rib is provided in the third reinforcing cavity.

[0014] Preferably, a fourth reinforcing rib is provided between the arc-shaped transition section and the top of the support leg, on the upper inner wall of the crossbeam, and on the lower inner wall of the crossbeam.

[0015] Preferably, a fifth reinforcing rib is provided between the inner sidewalls of the two legs.

[0016] Preferably, the side of the fifth reinforcing rib facing the outer side of the outrigger is a concave arc-shaped surface.

[0017] The beneficial effects of this utility model are: 1. This solution adopts a dual assembly system with a pre-positioning structure for initial guidance and limiting, and an elastic locking component for secondary locking. The positioning piece and the slot enable rapid alignment during assembly, avoiding misalignment; the elastic locking component prevents the support leg from detaching upwards after insertion; and the pre-positioning structure and the locking structure are concentrated in the same assembly area at the head of the support leg, so the load can be distributed synchronously in the same joint area, avoiding the phenomenon of single-point stress splitting.

[0018] 2. The support legs form a continuous inverted U-shaped support frame, which, together with the arc-shaped transition section and the upward-arched crossbeam, constitutes a composite arched force-bearing system. Compared with straight chair legs with flat crossbeams, the arched crossbeam combined with the arc-shaped transition section structure can effectively decompose the outward expansion thrust of the bottom of the support legs, significantly reducing the stress peak at the joint between the seat and the support legs; the arched structure and the double-locking assembly structure work together to ensure that the load borne at the assembly joint can be smoothly transmitted to the arched support frame, and the two form a synergistic effect.

[0019] 3. Multiple levels of reinforcing ribs are strategically placed according to the varying stress characteristics of different areas, forming a comprehensive reinforcement network. Particularly in the connecting stress cavities, an asymmetrical, non-right-angled, diagonally intersecting layout of long and short ribs is employed. These asymmetrical diagonally intersecting ribs can stagger the stress peak positions and simultaneously withstand composite bending moments from multiple directions, resulting in superior deformation resistance. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the support leg of this utility model. Figure 1 .

[0023] Figure 3 This is a schematic diagram of the support leg of this utility model. Figure 2 .

[0024] Figure 4 This is a schematic diagram of the structure of the seat board of this utility model. Figure 1 Figure 5 This is a schematic diagram of the structure of the seat board of this utility model. Figure 2 Wherein: 1-seat plate, 2-support leg, 21-head, 22-support leg, 23-crossbeam, 24-arc transition section, 3-pre-positioning structure, 31-slot, 32-positioning piece, 4-elastic locking assembly, 41-elastic locking block, 42-locking opening, 5-first connecting piece, 6-second connecting piece, 7-accommodating space, 8-reinforcing cavity, 81-first reinforcing rib, 82-second reinforcing rib, 9-third reinforcing cavity, 91-third reinforcing rib, 10-fourth reinforcing rib, 11-fifth reinforcing rib. Detailed Implementation

[0025] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0026] like Figures 1-5 As shown, this utility model discloses a toy chair, including a seat 1 and two symmetrical, detachable, and pluggable support legs 2 attached to the bottom of the seat 1. The support legs 2 are integrally injection-molded support components, and the overall structure includes a head 21, two symmetrical legs 22, and a crossbeam 23 connecting the lower ends of the two legs 22. A pre-positioning structure 3 is provided between the head 21 and the seat 1, consisting of a slot 31 on the head and a locking piece 32 on the bottom surface of the seat, achieving pluggable alignment and initial positioning. An elastic locking component 4 is further provided between the head and the seat, locking and preventing detachment after plugging in. The two legs together form an inverted U-shaped support frame, with an arc-shaped transition section 24 at the lower end of the legs, and the crossbeam 23 arches upward to form an arched load-bearing structure. Compared to the traditional single vertical force-bearing mode of straight beams and straight chair legs, this utility model adopts an inverted U-shaped support frame, an arc-shaped transition section, and an arched beam to form a continuous curved integrated force transmission structure. This overcomes the drawbacks of centralized force-bearing in traditional structures, achieving multi-path, all-round load distribution and transmission. While maintaining lightweight design, this application also offers ease of assembly and disassembly, structural stability, and fatigue resistance, significantly improving practicality and safety.

[0027] As shown in the table below, in order to verify the stability of this structure, the inventors conducted lateral forward and backward stability tests and vertical static pressure overload load tests. The test conditions were uniformly set as the same material, the same plastic part wall thickness, and the same product size.

[0028]

[0029] Table 1 The experiments show that the arched crossbeam combined with the arc-shaped transition section structure of this invention can decompose and cancel out the lateral thrust inward, with no significant outward expansion of the legs, stable overall center of gravity, and no tilting, warping, or forward / backward tipping of the chair, significantly improving lateral stability. Furthermore, the arched structure of this invention forms an arched bridge-like force distribution principle, distributing the load along multiple paths along the arc-shaped surface, greatly reducing the stress on the joints, minimizing structural deformation, and significantly improving vertical load-bearing capacity compared to traditional structures.

[0030] For further details, please refer to [link / reference]. Figure 3 , Figure 4 The elastic locking assembly 4 includes an elastic locking block 41 and a locking slot 42. A first connecting piece 5 extends from the inner side of the head 21, and the elastic locking block 41 is disposed on the first connecting piece 5. A second connecting piece 6 extends downward from the bottom surface of the seat plate 1, and the locking slot 42 is opened on the second connecting piece 6. After insertion and assembly, the first connecting piece 5 and the second connecting piece 6 are completely fitted together, and the elastic locking block 41 elastically engages with the locking slot 42 to achieve locking. This structure upgrades point-like locking to a surface-fitting locking structure by making the first connecting piece and the second connecting piece fit together, greatly increasing the contact area of ​​the force-bearing components, dispersing the tensile stress at the locking position, and avoiding stress concentration and breakage of the elastic locking block at a single point.

[0031] like Figure 4 , Figure 5 As shown, the first connecting piece 5 and the outer wall of the seat plate 1 enclose a receiving space 7, and the locking piece 32 is housed inside the receiving space 7. The receiving space 7 completely covers the outer side of the head 21 of the support leg 2, forming a two-way limiting structure. Conventional pre-positioning slots and locking pieces are exposed mating structures, which can only achieve one-way fitting and limiting. When children play and shake the support leg, the head is prone to horizontal displacement, resulting in alignment deviation and force displacement. This utility model uses the receiving space to form an external full-coverage constraint on the head of the support leg. Combined with the fitting and limiting of the internal slot and locking piece, it constructs a two-way constraint system of internal fitting positioning + external wrapping and limiting, which accurately limits the horizontal displacement and angular tilt of the support leg, ensuring accurate alignment and uniform force position in each assembly.

[0032] The first connecting piece 5 and the second connecting piece 6 are joined together to form a reinforcing cavity 8. Within the reinforcing cavity 8, intersecting first reinforcing ribs 81 and second reinforcing ribs 82 are arranged. The first reinforcing ribs 81 and 82 are of unequal length, arranged asymmetrically, and intersect at a non-right angle. The first reinforcing rib 81 is connected to one set of connecting pieces at both ends, and the second reinforcing rib 82 is connected to the other set of connecting pieces at its end. Traditional 90° equal-length cross reinforcing ribs are orthogonally symmetrical structures, and their force paths are only suitable for two fixed directions: horizontal and vertical. When children play, they often experience combined loads of oblique swaying and lateral torsion. These external forces act at an angle to the right-angled reinforcing ribs, preventing axial transmission. All stress is concentrated at the intersection point at the root of the ribs, easily causing root stress overload, whitening, and cracking. (See also...) Figure 5 This utility model adopts an asymmetrical, non-right-angled diagonal cross structure with one long and one short rib. The long and short ribs are staggered to avoid the stress concentration points at the roots of the two ribs, thus preventing the superposition and accumulation of multi-directional loads. At the same time, the arrangement angle of the diagonal ribs is more in line with the actual diagonal force direction of children, which can convert the diagonal external force into the axial tensile and compressive force of the ribs. This allows the load to be effectively transmitted along the ribs instead of accumulating at the roots, thereby reducing high-stress cracking and deformation problems from the mechanical source.

[0033] The second connecting piece 6 and the outer wall of the seat plate 1 enclose a third reinforcing cavity 9, and a third reinforcing rib 91 is provided inside the third reinforcing cavity 9. This invention provides a third reinforcing rib between the second connecting piece and the outer wall of the seat plate, forming a stable supporting structure. This effectively buffers and disperses concentrated stress at the root of the connecting piece, eliminates sudden stress changes at corners, and prevents cracking or breakage at the root of the connecting piece during frequent shaking or pressure by children, further improving the structural stability of the assembly connection position.

[0034] And such as Figure 3 , Figure 4 As shown, fourth reinforcing ribs 10 are evenly distributed between the arc-shaped transition section 24 and the upper section of the support leg 22, on the upper inner wall of the crossbeam 23, and on the lower inner wall of the crossbeam 23. Under long-term pressure, the inner wall of the arched structure is prone to tensile stress and creep deformation. To address this, this invention provides fourth reinforcing ribs throughout the arc-shaped transition joint and the upper and lower inner walls of the crossbeam, forming a continuous reinforcing skeleton along the load transfer contour. This effectively improves the bending, compressive, and deformation resistance of the arc-shaped area and the arched crossbeam, preventing the arched structure from collapsing or deforming under long-term stress.

[0035] Furthermore, a fifth reinforcing rib 11 is provided between the inner walls of the two legs 22, and the outer side of the fifth reinforcing rib 11 is designed with a concave arc shape. When the lower ends of the two legs are subjected to pressure or lateral force, they tend to expand outwards, which can easily lead to deformation of the support frame and a decrease in stability. This utility model effectively restrains the outward expansion deformation of the legs by laterally connecting the left and right legs with the fifth reinforcing rib, maintaining the structural integrity of the inverted U-shaped frame. At the same time, the outer side of the fifth reinforcing rib 11 adopts a concave arc shape design (see...). Figure 3 During injection molding, the smooth, curved structure reduces melt flow resistance and avoids uneven flow, air trapping, and material accumulation at right angles and sharp corners. This allows for more uniform molten plastic filling, effectively reducing molding defects such as shrinkage marks, depressions, and short sections on the plastic part surface, thus improving product yield. Furthermore, the curved surface is a continuous, smooth structure with no right-angle stress concentration points. Under stress, it can evenly distribute localized stress along the curved surface, improving the uniformity of structural stress and making the overall support more stable.

[0036] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A toy chair, comprising a seat and two sets of support legs detachably and pluggably assembled to the bottom of the seat, characterized in that, The support leg is an integrally formed support component, comprising a head, two legs, and a crossbeam; the two legs are symmetrically arranged on both sides of the head, and the crossbeam connects the lower ends of the two legs. The head and the seat are provided with a pre-positioning structure that cooperates with each other. The pre-positioning structure includes a slot in the head and a positioning piece on the bottom surface of the seat that can be fitted into the slot. An elastic locking component is also provided between the inner side of the head or support leg and the seat, the elastic locking component being used to lock and limit the support leg and seat after they are inserted. The two legs together form an inverted U-shaped support frame, with an arc-shaped transition section at the bottom of the legs, and the crossbeam is constructed as an upward-arching arch.

2. A toy chair as described in claim 1, characterized in that, The elastic locking assembly includes a mutually cooperating elastic locking block and a locking jaw; The head or outrigger extends into the inner side to form a first connecting piece, and the elastic locking block is disposed on the first connecting piece; The bottom surface of the seat extends downward to form a second connecting piece, and the locking slot is opened on the second connecting piece; When the support leg and seat are connected and assembled, the first connecting piece and the second connecting piece fit together, and the elastic locking block and the locking port form a locking engagement.

3. A toy chair as described in claim 2, characterized in that, The first connecting piece and the outer wall of the seat plate together form an accommodating space, the locking piece is arranged in the accommodating space, and the accommodating space covers the outer side of the head of the support leg.

4. A toy chair as described in claim 2, characterized in that, The first connecting piece and the second connecting piece are joined together to form a reinforced cavity; The reinforced cavity is provided with intersecting first and second reinforcing ribs; The first reinforcing rib is connected to a first connecting piece or a second connecting piece at both ends, and the end of the second reinforcing rib is connected to another connecting piece.

5. A toy chair as described in claim 4, characterized in that, The first reinforcing rib and the second reinforcing rib are arranged at a non-right angle intersection.

6. A toy chair as described in claim 2, characterized in that, The second connecting piece and the outer wall of the seat plate form a third reinforcing cavity, and a third reinforcing rib is provided in the third reinforcing cavity.

7. A toy chair as described in claim 1, characterized in that, Fourth reinforcing ribs are respectively arranged between the arc-shaped transition section and the top of the support leg, on the upper inner wall of the crossbeam, and on the lower inner wall of the crossbeam.

8. A toy chair as described in claim 1, characterized in that, A fifth reinforcing rib is installed between the inner sidewalls of the two legs.

9. A toy chair as described in claim 8, characterized in that, The side of the fifth reinforcing rib facing the outer side of the outrigger is a concave arc shape.

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