Combined chair structure

Abstract

The utility model discloses a combined chair structure, comprising: a seat module, which comprises a front support, a rear support, a backrest assembly and a seat assembly, the front support is installed at the bottom of the backrest assembly, the rear support is arranged behind the front support and is connected with the backrest assembly, and the seat assembly is installed on the front support; the dinner plate module is arranged above the seat assembly and detachably connected with the backrest assembly and the seat assembly, and the seat frame module is arranged on the top of the seat assembly and detachably connected with the upper end of the front support and / or the backrest assembly. The chair structure disclosed by the utility model can be switched among different use states, so that the chair structure can be suitable for adults, children or infants.

Description

Technical Field

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

[0002] Some existing seats cannot be folded for storage, taking up a lot of space and making them inconvenient to store and transport. While some seats can be folded for storage, their folding structures are complex and costly.

[0003] In addition, existing car seats have limited functionality, are only suitable for children or adults, and cannot be combined with other children's or infant products, resulting in poor flexibility and affecting the user experience. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the problems existing in the prior art. To this end, the present invention proposes a modular chair structure that can switch between different usage states, thus making it suitable for use by adults, children or infants.

[0005] The modular chair structure described above is achieved through the following technical solution:

[0006] A modular chair structure includes: a seat module comprising a front support, a rear support, a backrest assembly, and a seat assembly, wherein the front support is mounted at the bottom of the backrest assembly, the rear support is disposed behind the front support and connected to the backrest assembly, and the seat assembly is mounted on the front support; and a tray module or a seat frame module, wherein the tray module is disposed above the seat assembly and is detachably connected to both the backrest assembly and the seat assembly, and the seat frame module is disposed at the top of the seat assembly and is detachably connected to the upper end of the front support and / or the backrest assembly.

[0007] In some embodiments, the tray module includes an inner circumference assembly and a tray assembly. The inner circumference assembly is disposed on top of the seat assembly and its rear end is detachably connected to the backrest assembly. The inner circumference assembly has a cavity that is open at both the top and bottom. The front sidewall of the inner circumference assembly has two front openings communicating with the cavity and a downwardly extending baffle. The baffle is located between the two front openings and its lower end is detachably connected to the front end of the seat assembly. The tray assembly is connected to the front side of the inner circumference assembly.

[0008] In some embodiments, the plate assembly is integrally formed with the inner circumference assembly; or, on the left and right sides of the rear end of the plate assembly, there are rearwardly extending and deformable connecting strips, the two connecting strips are respectively located on the left and right outer sides of the inner circumference assembly, and the two connecting strips are snap-fitted to the inner circumference assembly.

[0009] In some embodiments, an upper slot with a downward opening is provided at the upper back of the inner circumference assembly, and the upper end of the backrest assembly is inserted into the upper slot; and / or a lower slot is provided at the bottom of the backrest assembly, and a rearwardly extending lower connecting part is provided at the lower back of the inner circumference assembly, the lower connecting part being disposed at the bottom of the backrest assembly and engaging with the lower slot.

[0010] In some embodiments, a downwardly extending crossbeam is provided at the front end of the bottom of the seat assembly, and mounting holes are provided on the crossbeam through its front and rear side walls. The lower end of the baffle is bent backward to form a connecting plate, which is transversely inserted through the mounting holes and snapped together with the crossbeam.

[0011] In some embodiments, the left and right ends of the seat frame module are respectively provided with downwardly extending mounting portions; it also includes two adapters, the lower ends of the two adapters being detachably connected to the left and right sides of the upper end of the front bracket and / or the left and right ends of the backrest assembly, and the upper ends of the two adapters being detachably connected to the two mounting portions.

[0012] In some embodiments, guide rail grooves facing the adapter opening are respectively provided on the left and right sides of the front bracket, and the adapter has a positioning protrusion at the position corresponding to the guide rail groove, the positioning protrusion being inserted into the guide rail groove; and / or the lower end of the adapter is detachably connected to the front bracket by at least two fasteners, the upper end of the adapter is inserted into the mounting part, and the upper end of the adapter is detachably connected to the mounting part by a quick-release structure and / or at least two fasteners.

[0013] In some embodiments, the adapter includes an upper connecting section, a transition section, and a lower connecting section. The lower connecting section is detachably connected to the front bracket via at least two fasteners. The transition section is integrally formed on the front side of the upper end of the lower connecting section. The upper connecting section is integrally formed on the top of the transition section. The upper connecting section is inserted into the mounting portion and is detachably connected to the mounting portion via a quick-release structure and / or at least two fasteners.

[0014] In some embodiments, the seat assembly includes a fixed seat and a seat plate, the left and right ends of the fixed seat being connected to the left and right sides of the upper end of the front support, the seat plate being movably disposed on the top of the fixed seat, and the seat plate being detachably connected to the fixed seat by at least two connectors or snap-fit ​​structures; and / or the rear support is rotatably connected to the backrest assembly, and the rear support is locked or unlocked to the backrest assembly by a locking mechanism.

[0015] In some embodiments, a foot pedal assembly and / or a height adjustment mechanism are also included, the foot pedal assembly being disposed on the front support, and the foot pedal assembly and / or the seat assembly being connected to the front support via the height adjustment mechanism.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] 1. The modular chair structure of this utility model allows the seat module to be used independently, and the seat module can be combined with the tray module or the seat frame module to enable the product to switch between different usage states, thus making it suitable for adults, children or infants;

[0018] 2. The seat assembly includes a fixed seat and a seat plate. The left and right ends of the fixed seat are connected to the left and right ends of the front bracket, respectively. The seat plate is movably mounted on top of the fixed seat and is detachably connected to the fixed seat by at least two connectors or buckle structures. This allows the position of the seat plate to be adjusted forward and backward, making the seat module more suitable for children or adults and improving the flexibility of use. Attached Figure Description

[0019] Figure 1 This is an exploded view of the seat module in an embodiment of this utility model;

[0020] Figure 2 This is a schematic diagram of the seat module in the unfolded state in an embodiment of this utility model;

[0021] Figure 3 This is a schematic diagram of the seat module in a folded state in an embodiment of this utility model;

[0022] Figure 4 This is a cross-sectional view of the seat module in the unfolded state in an embodiment of this utility model. Figure 1 ;

[0023] Figure 5 This is a cross-sectional view of the seat module in the unfolded state in an embodiment of this utility model. Figure 2 ;

[0024] Figure 6 This is an exploded view of the front bracket and locking mechanism in an embodiment of this utility model;

[0025] Figure 7 This is a cross-sectional view of the seat module in the unfolded state in an embodiment of this utility model. Figure 3 ;

[0026] Figure 8 The explosion of the seat assembly and height adjustment assembly in this embodiment of the utility model Figure 1 ;

[0027] Figure 9 The explosion of the seat assembly and height adjustment assembly in this embodiment of the utility model Figure 2 ;

[0028] Figure 10 This is a cross-sectional view of the seat assembly and height adjustment assembly in an embodiment of the present invention. Figure 1 ;

[0029] Figure 11 This is a cross-sectional view of the seat assembly and height adjustment assembly in an embodiment of the present invention. Figure 2 ;

[0030] Figure 12 This is a cross-sectional view of the seat module in the unfolded state in an embodiment of this utility model. Figure 4 ;

[0031] Figure 13 The explosion of the foot pedal assembly and height adjustment assembly in this embodiment of the utility model Figure 1 ;

[0032] Figure 14 The explosion of the foot pedal assembly and height adjustment assembly in this embodiment of the utility model Figure 2 ;

[0033] Figure 15 This is an exploded view of the seat module and the plate module in an embodiment of this utility model;

[0034] Figure 16 This is a schematic diagram of the tray module installed on the seat module in an embodiment of this utility model;

[0035] Figure 17 This is a cross-sectional view of the tray module installed on the seat module in an embodiment of this utility model. Figure 1 ;

[0036] Figure 18 This is a cross-sectional view of the tray module installed on the seat module in an embodiment of this utility model. Figure 2 ;

[0037] Figure 19 This is an exploded view of the plate module in an embodiment of this utility model;

[0038] Figure 20 This is a schematic diagram of the structure of the plate module in an embodiment of this utility model;

[0039] Figure 21 This is an exploded view of the seat module, adapter, and seat frame module in an embodiment of this utility model;

[0040] Figure 22 This is a schematic diagram of the structure of the seat frame module installed on the seat module in an embodiment of this utility model;

[0041] Figure 23 This is a cross-sectional view of the seat frame module installed on the seat module in an embodiment of this utility model;

[0042] Figure 24 This is a cross-sectional view of the frame module in an embodiment of this utility model.

[0043] In the diagram: 1-Seat module, 11-Front bracket, 111-Front connecting rod, 112-Front support foot, 1121-Guide rail groove, 1122-Positioning hole, 12-Rear bracket, 121-Rear connecting rod, 122-Rear support foot, 1221-Slide groove, 1222-Stop, 1223-Fixing column, 13-Backrest assembly, 131-Lower slot, 132-Front connecting arm, 133-Rear connecting arm, 1331-Lock hole, 14-Seat assembly, 141-Fixing seat, 1411-Crossbeam, 1412-Mounting hole, 1413-Snap-fit ​​hole, 1414-Opening, 1415-Mounting groove, 1416-Limiting hole. 142-Seat plate, 1421-Fixing hole, 143-First reinforcing frame, 144-Second reinforcing frame, 145-Slider, 15-Locking mechanism, 151-First locking element, 1511-Lock tongue, 1512-Unlocking part, 1513-Receiving groove, 1514-Positioning groove, 1515-Guide groove, 152-First elastic element, 16-Foot pedal assembly, 161-Connecting seat, 162-Foot pedal, 17-Height adjustment mechanism, 171-Second locking element, 1711-Locking pin, 1712-Guide hole, 172-Second elastic element, 173-Adjusting element, 1731-First protrusion, 1732-Second protrusion;

[0044] 2-Plate module, 21-Inner circumference component, 211-Cavity, 212-Front opening, 213-Baffle strip, 2131-Connecting plate, 2132-Spring buckle, 214-Snap fastener, 215-Upper slot, 216-Lower connecting part, 22-Plate assembly, 221-Connecting strip, 222-Snap-fit ​​hole;

[0045] 3-Frame module, 31-Mounting part, 311-Slot, 32-Quick release structure;

[0046] 4-Adapter, 41-Upper connecting section, 411-Card slot, 42-Transition section, 43-Lower connecting section, 431-Positioning protrusion. Detailed Implementation

[0047] The following embodiments illustrate the present invention, but the present invention is not limited to these embodiments. Modifications to the specific implementation of the present invention or equivalent substitutions for some technical features, without departing from the spirit of the present invention, should all be covered within the scope of the technical solution claimed by the present invention.

[0048] Example 1

[0049] refer to Figure 15-24 This embodiment provides a modular chair structure, including a seat module 1 and a tray module 2 or a seat frame module 3. The seat module 1 includes a front support 11, a rear support 12, a backrest assembly 13, and a seat assembly 14. The front support 11 is mounted at the bottom of the backrest assembly 13, the rear support 12 is located behind the front support 11 and connected to the backrest assembly 13, and the seat assembly 14 is mounted on the front support 11, thus allowing the seat module 1 itself to function as a high chair for older children or adults. The tray module 2 is positioned above the seat assembly 14 and is detachably connected to both the backrest assembly 13 and the seat assembly 14. In this configuration, the tray module 2 and the seat module 1 combine to form a children's high chair for children's meals. The seat frame module 3 is positioned on top of the seat assembly 14 and is detachably connected to the upper end of the front support 11 and / or the backrest assembly 13. In this configuration, the tray module 2 and the seat frame module 3 combine to form an infant recliner suitable for use by infants and toddlers.

[0050] As can be seen, in this embodiment of the combined chair structure, the seat module 1 can be used alone, and the seat module 1 can be used in combination with the tray module 2 or the seat frame module 3, so that the product can be switched between different usage states, thereby making it suitable for adults, children or infants.

[0051] refer to Figure 15-20 The tray module 2 includes an inner circumference component 21 and a tray component 22. The inner circumference component 21 is located on top of the seat component 14 and its rear end is detachably connected to the backrest component 13. The inner circumference component 21 has a cavity 211 that is open at both the top and bottom. The front side wall of the inner circumference component 21 has two front openings 212 that communicate with the cavity 211 and a downwardly extending baffle 213. The two front openings are for the child's two feet to pass through. The baffle 213 is located between the two front openings 212 and its lower end is detachably connected to the front end of the seat component 14. The tray component 22 is connected to the front side of the inner circumference component 21. Thus, the tray component 22 can be stably and reliably detachably installed on the seat module 1 through the inner circumference component. When the child sits in the high chair, the inner circumference component 21 fits over the child's body and functions as a backrest, while also reliably supporting the tray component 22. Since the lower end of the baffle 213 is detachably connected to the front end of the seat component 14, it effectively prevents the child from sliding forward out of the high chair.

[0052] The plate assembly 22 can be integrally formed with the inner circumference assembly 21. Alternatively, the plate assembly 22 can be detachably connected to the inner circumference assembly 21 via a snap-fit ​​mechanism or connecting screws. (See reference) Figures 19-20In this embodiment, two rearwardly extending and deformable connecting strips 221 are integrally formed on the left and right sides of the rear end of the plate assembly 22. These two connecting strips 221 are located on the left and right outer sides of the inner perimeter assembly 21, and are snap-fitted to the inner perimeter assembly 21, allowing the plate assembly to be quickly attached and detached from the inner perimeter assembly 21. In this embodiment, snap-fit ​​holes 222 are provided on the connecting strips 221, and snap-fit ​​portions 214 are integrally formed on the left and right side walls of the inner perimeter assembly 21. The snap-fit ​​portions 214 engage with the corresponding snap-fit ​​holes. Therefore, when the connecting strip 221 is pulled away from the inner perimeter assembly 21, the snap-fit ​​portions 214 disengage from the snap-fit ​​holes and unlock; conversely, when the connecting strip 221 is pushed towards the inner perimeter assembly 21, the snap-fit ​​portions 214 engage with the snap-fit ​​holes and lock.

[0053] refer to Figure 15-20 An upper slot 215 with a downward opening is provided at the upper back of the inner perimeter component 21. The upper end of the backrest component 13 is inserted into the upper slot 215, thereby enabling the inner perimeter component 21 to be detachably installed on the backrest component 13 and simultaneously achieving a lower limit for the inner perimeter component; and / or a lower slot 131 is recessed on the left and right sides of the bottom of the backrest component 13. A lower connecting part 216 extending backward is integrally formed at the lower back of the inner perimeter component 21 at the position corresponding to the lower slot 131. The lower connecting part 216 is provided at the bottom of the backrest component 13 and engages with the corresponding lower slot 131, thereby enabling the inner perimeter component 21 to be detachably installed on the backrest component 13 and simultaneously achieving an upper limit for the inner perimeter component. As can be seen, by setting the lower connecting part 216 at the lower end of the back of the inner enclosure component 21 to the bottom of the backrest component 13 and engaging it with the corresponding lower slot 131, and by placing the upper slot 215 at the upper end of the back of the inner enclosure component 21 outside the upper end of the backrest component 13, the inner enclosure component 21 can stably and reliably clamp the backrest component 13, effectively preventing the inner enclosure component or the plate module 2 from tilting forward.

[0054] refer to Figure 8-11 and Figure 15-18 A downward-extending crossbeam 1411 is provided at the front end of the bottom of the seat assembly 14. A mounting hole 1412, penetrating the front and rear side walls of the crossbeam 1411, is provided in the middle of its left-right direction. The lower end of the retaining strip 213 is bent backward to form a connecting plate 2131. The connecting plate 2131 is transversely inserted through the mounting hole 1412 and snap-fitted to the crossbeam 1411. Specifically, a snap-fit ​​hole 1413 communicating with the mounting hole 1412 is provided at the bottom of the crossbeam 1411. A deformable spring clip 2132 is provided on the connecting plate 2131 at the position corresponding to the snap-fit ​​hole. The spring clip 2132 engages with the snap-fit ​​hole 1413 for snap-fit ​​connection. This facilitates the stable, reliable, and quick installation and removal of the retaining strip 213 from the seat assembly 14.

[0055] refer to Figure 21-24Furthermore, mounting portions 31 extending downwards are provided at both ends of the seat frame module 3. The chair structure includes two adapters 4, the lower ends of which are detachably connected to the left and right sides of the upper end of the front support 11 and / or the left and right ends of the backrest assembly 13, respectively. In this embodiment, the lower ends of the two adapters 4 are detachably connected to the upper ends of the two front support legs 121 of the front support 11 by fasteners (e.g., screws), and the upper ends of the two adapters 4 are detachably connected to the two mounting portions 31, respectively. Thus, it is convenient to quickly install and remove the seat frame module 3 from the seat module 1 using the two adapters 4.

[0056] Specifically, guide rail grooves 1121 with openings towards the adapter 4 are provided on the left and right sides of the front bracket 11, that is, guide rail grooves 1121 with openings towards the adapter 4 are provided on the two front support feet 121 of the front bracket 11. The adapter 4 has a positioning protrusion 431 at the position corresponding to the guide rail groove 1121. The positioning protrusion 431 is inserted into the guide rail groove 1121, thereby realizing the quick pre-positioning of the adapter 4 on the front bracket 11. In addition, the lower end of the adapter 4 is detachably connected to the front bracket 11 by at least two fasteners, and the upper end of the adapter 4 is inserted into the slot 311 of the mounting part 31. The upper end of the adapter 4 is detachably connected to the mounting part 31 by a quick-release structure 32 and / or at least two fasteners.

[0057] In this embodiment, the adapter 4 includes an upper connecting section 41, a transition section 42, and a lower connecting section 43. The lower connecting section 43 is detachably connected to the front bracket 11 via at least two fasteners, and a vertically arranged positioning protrusion 431 is integrally formed on the lower connecting section 43. The transition section 42 is integrally formed on the front side of the upper end of the lower connecting section 43, and the upper connecting section 41 is integrally formed on the top of the transition section 42. The upper connecting section 41 is inserted into the slot 311 of the mounting part 31, and is detachably connected to the mounting part 31 via a quick-release structure 32 and / or at least two fasteners. Specifically, a locking slot 411 is provided on the upper connecting section 41 (see...). Figure 21 The quick-release structure 32 is rotatably mounted on the mounting part 31 and is provided with a hook (see...). Figure 24 The hook is configured to lock or unlock with the slot 411 so that the upper end of the adapter 4 can be quickly attached or detached from the mounting part of the bracket module 3.

[0058] refer to Figure 1-6In this embodiment, the front support 11 includes a front connecting rod 111 and two front support legs 112 arranged at intervals on the left and right. The lower ends of the two front support legs 112 are connected and fixed together by the front connecting rod 111 to improve the overall strength of the front support. The rear support 12 is located behind the front support 11 and includes a rear connecting rod 121 and two rear support legs 122 arranged at intervals on the left and right. The lower ends of the two rear support legs 122 are connected and fixed together by the rear connecting rod 121 to improve the overall strength of the rear support 12. The seat assembly 14 is located between the two front support legs 112, and its left and right ends are respectively connected to the two front support legs 112.

[0059] The backrest assembly 13 is disposed on the top of the front support 11 and the rear support 12. A lower retaining groove 131 is recessed at the bottom of the backrest assembly 13. A front connecting arm 132 extending forward and downward and a rear connecting arm 133 extending backward and downward are respectively provided at the left and right ends of the backrest assembly 13. The two front connecting arms 132 are respectively connected and fixed to the two front support legs 112, and the two rear connecting arms 133 are respectively rotatably connected to the two rear support legs 122. In this embodiment, the front support 11 cannot rotate relative to the backrest assembly 13, while the rear support legs 122 can rotate around the backrest assembly 13 to fold and retract toward the front support 11 or unfold away from the front support 11. The seat module 1 also includes a locking mechanism 15, through which the rear connecting arms 133 and the rear support legs 122 are locked or unlocked. When the locking mechanism 15 is unlocked, the rear support leg 122 can rotate around the backrest assembly 13 to fold towards the front support 11 or unfold away from the front support 11, so that the rear support 12 can fold towards the front support 11 or unfold away from the front support 11. Conversely, when the locking mechanism 15 is locked, the rear support leg 122 cannot rotate around the backrest assembly 13, so that the rear support 12 can be stably and reliably maintained in the folded or unfolded state. The structure is simple, easy to fold, store and transport, and the rear support is stable and reliable after folding and will not unfold automatically.

[0060] Specifically, a vertically arranged groove 1221 is provided on the upper end of the outer side wall of the rear support leg 122 facing the rear connecting rod 111, and at least two circumferentially spaced locking holes 1331 are provided on the outer side wall of the free end of the rear connecting arm 133, so that the rear support leg 122 can be reliably positioned at different rotation angles. The locking mechanism 15 includes a first locking member 151 and a first elastic member 152. The first locking member 151 is movably disposed in the upper end of the rear support leg 122, and an upwardly extending locking tongue 1511 is protruding from the top of the first locking member 151. The locking tongue 1511 can lock or unlock with any locking hole 1331 on the rear connecting arm 133. An outwardly extending unlocking part 1512 is protruding from the outer side wall of the first locking member 151 facing the groove 1221, and the unlocking part 1512 is movably inserted into the groove 1221. The first elastic member 152 is disposed inside the rear support foot 122, and its upper and lower ends abut or connect with the first locking member 151 and the rear support foot 122 respectively, so as to keep the first locking member 151 always moving towards the rear connecting arm 133.

[0061] When the unlocking part 1512 is pushed downward along the slide groove 1221 by an external force, the first locking member 151 of the unlocking part 1512 can move downward, so that the locking tongue 1511 moves away from the lock hole 1331 and is unlocked. At this time, the rear support foot can rotate relative to the backrest assembly. Conversely, when the external force is removed, the first locking member 151 automatically moves upward under the push of the first elastic member 152, so that the locking tongue 1511 is inserted into the corresponding lock hole 1331 and locked. At this time, the rear support foot cannot rotate relative to the backrest assembly, so that the rear bracket 12 is reliably positioned in the unfolded or folded state.

[0062] refer to Figure 3-5 In this embodiment, the unlocking part 1512 is recessed with a receiving groove 1513 that opens toward the slide groove 1221. The receiving groove 1513 is suitable for accommodating the user's finger; and / or a positioning groove 1514 is provided at the lower end of the first locking member 151, and a stop part 1222 is provided in the rear support foot 122. The upper end of the first elastic member 152 is inserted into the positioning groove 1514 and abuts or connects with the first locking member 151, and the lower end of the first elastic member 152 abuts or connects with the stop part 1222.

[0063] More specifically, a guide groove 1515 is provided on the first locking member 151, which is arranged vertically and located above or below the unlocking part 1512. A fixing post 1223 extending toward the guide groove 1515 is provided on the inner surface of the outer side wall at the upper end of the rear support foot 122. The fixing post 1223 is slidably connected to the guide groove 1515, thereby guiding the up and down movement of the first locking member and preventing displacement.

[0064] refer to Figure 1-11Specifically, the seat assembly 14 includes a fixed base 141 and a seat plate 142. The left and right ends of the fixed base 141 are respectively connected to two front support legs 112. The seat plate 142 is movably disposed on top of the fixed base 141, and the seat plate 142 and the fixed base 141 are detachably connected by at least two connectors (not shown in the figure) or a snap-fit ​​structure, thereby making the position of the seat plate 142 adjustable, thus making the seat more suitable for children or adults and improving the flexibility of use. In particular, in other embodiments, the seat plate can be designed to be unable to move back and forth relative to the fixed base 141. In this case, the seat plate and the fixed base 141 can be integrally injection molded, or they can be detachably connected by connecting screws or a snap-fit ​​structure.

[0065] refer to Figure 9-11 The mounting base 141 has a plurality of openings 1414 spaced apart and equal in number to the connecting members (e.g., screws). In this embodiment, there are three openings, and the center points of the three openings 1414 are adjacent to each other to form a triangle. A group of fixing holes is provided at the bottom of the seat plate 142 at the positions corresponding to the openings 1414. The group of fixing holes includes a plurality of fixing holes 1421 spaced apart along the front-back direction of the seat plate 142. The connecting member passes through the openings 1414 from bottom to top and is then securely connected to any one of the fixing holes 1421 in the group of fixing holes. Thus, by adjusting one of the fixing holes 1421 in the group of fixing holes to align with the corresponding opening, and then connecting and fixing it with the connecting member, the front-back position of the seat plate 142 can be adjusted.

[0066] More specifically, the seat assembly 14 further includes a first reinforcing frame 143 and / or a second reinforcing frame 144. The first reinforcing frame 143 is provided in the front end of the fixed seat 141 and is arranged laterally in the left-right direction to enhance the overall strength of the front end of the seat assembly 14. And / or at least two second reinforcing frames 144 are provided in the fixed seat 141 and are arranged in the front-back or left-right direction. The at least two second reinforcing frames 144 are arranged in a one-to-one correspondence with at least two connectors (or multiple openings) to enhance the strength of the rear end of the seat assembly and facilitate the improvement of the connection stability and reliability between the seat plate and the fixed seat.

[0067] refer to Figure 8-11 A downwardly extending crossbeam 1411 protrudes from the bottom front end of the fixing seat 141 of the seat assembly 14. The left and right ends of the crossbeam 1411 are respectively connected to the two front support legs of the front bracket 11. Multiple openings 1414 are provided behind the crossbeam. A mounting hole 1412 penetrating through the front and rear side walls is provided in the middle of the crossbeam 1411 in the left-right direction. In addition, a snap-fit ​​hole 1413 is provided at the bottom of the crossbeam 1411 at the position corresponding to the mounting hole, and the snap-fit ​​hole 1413 is connected to the mounting hole 1412.

[0068] refer to Figure 1-3 and Figure 12-14Furthermore, the seat module 1 also includes a footrest assembly 16, which is disposed between the two front support legs 112 to reliably support the child's feet and improve the child's comfort while sitting in the seat. Specifically, the footrest assembly 16 includes a connecting seat 161 and a foot pedal 162. The left and right ends of the connecting seat 161 are respectively connected to the two front support legs 112 of the front bracket 11. In this embodiment, a downwardly extending crossbeam 1411 is provided at the bottom front end of the connecting seat 161, and the left and right ends of the crossbeam 1411 are respectively connected to the two front support legs of the front bracket 11. The foot pedal 162 is disposed on the top of the connecting seat 161. The foot pedal 162 can be integrally injection molded with the connecting seat 161, or it can be detachably connected by using connecting screws or a snap-fit ​​structure.

[0069] Example 2

[0070] refer to Figure 1-14 The difference between this embodiment and embodiment 1 is that the seat module 1 further includes a height adjustment mechanism 17. The foot pedal assembly 16 and / or the seat assembly 14 are connected to the front support leg 112 through the height adjustment mechanism 17, so that the height of the foot pedal assembly 16 and / or the seat assembly 14 is adjustable to accommodate children of different heights.

[0071] Specifically, each of the two front support legs 112 is provided with a plurality of positioning holes 1122 that open toward the seat assembly 14 and are spaced apart along the height direction, see [reference]. Figure 1 Mounting grooves 1415 are provided at both ends of the bottom of the foot pedal assembly 16 and / or the seat assembly 14. Through holes (not shown in the figure) are formed in the side walls of the mounting grooves 1415 near the positioning holes 1122. In this embodiment, downward-opening mounting grooves 1415 are recessed at both ends of the bottom of the crossbeam 1411 of the foot pedal assembly 16 and / or the seat assembly 14. (See reference) Figure 7-14 The height adjustment mechanism 17 includes a second locking member 171, a second elastic member 172, and an adjusting member 173. The second locking member 171 is movably disposed within the mounting groove 1415. A locking pin 1711 protrudes from one end of the second locking member 171 near the through hole. The locking pin 1711 can movably pass laterally through the through hole and engage with any positioning hole 1122. The second elastic member 172 is disposed within the mounting groove 1415, and its left and right ends respectively abut or connect with the second locking member 171 and the crossbeam, used to ensure that the second locking member 171 always maintains a tendency to move towards the positioning hole 1122. The adjusting member 173 is movably disposed outside the mounting groove 1415 and connected to the second locking member 171, used to drive the second locking member 171 to move towards or away from the positioning hole 1122.

[0072] When the adjusting member 173 is pushed by an external force to move away from the positioning hole 1122, the adjusting member 173 can simultaneously drive the second locking member to move, so that the locking pin 1711 moves away from the positioning hole 1122 and is unlocked. At this time, the foot pedal assembly 16 and / or the seat assembly 14 can be adjusted to the required height. Conversely, when the external force is removed, the second locking member moves automatically upward under the push of the second elastic member, so that the locking pin 1711 is inserted into the corresponding positioning hole 1122 and locked, thereby reliably limiting and fixing the foot pedal assembly 16 and / or the seat assembly 14 on the front bracket 11.

[0073] More specifically, a limiting hole 1416 is provided at the bottom of the crossbeam 1411 of the foot pedal assembly 16 and / or the seat assembly 14, near the mounting groove 1415, and a guide hole 1712 is provided on the second locking member 171. A first protrusion 1731 and a second protrusion 1732 extending upwards are respectively provided at the left and right ends of the adjusting member 173. The first protrusion 1731 is inserted into the limiting hole 1416 of the crossbeam 1411, and the second protrusion 1732 is movably inserted into the guide hole 1712. This guides the movement of the adjusting member 173 and the second locking member 171, preventing displacement, while ensuring that the adjusting member 173 reliably drives the second locking member to move.

[0074] Furthermore, a guide rail assembly (not shown in the figure) is provided between the front support leg 112 and the foot pedal assembly 16 and / or the seat assembly 14 to guide the foot pedal assembly 16 and / or the seat assembly 14 to move up and down along the guide rail assembly and prevent displacement. The guide rail assembly includes a guide rail groove 1121 and a slider 145. A vertically arranged guide rail groove 1121 is recessed on the outer side wall of the front support leg 112 facing the front connecting rod 111. A plurality of positioning holes 1122 are spaced apart along the height direction on the side wall of the guide rail groove 1121 facing the front connecting rod 111. The slider 145 is disposed on the foot pedal assembly 16 or the seat assembly 14 and is slidably connected to the guide rail groove 1121.

[0075] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A modular chair structure, characterized in that, include: A seat module (1) includes a front support (11), a rear support (12), a backrest assembly (13), and a seat assembly (14). The front support (11) is mounted on the bottom of the backrest assembly (13), the rear support (12) is disposed behind the front support (11) and connected to the backrest assembly (13), and the seat assembly (14) is mounted on the front support (11). A tray module (2) or a seat frame module (3) is provided above the seat assembly (14) and is detachably connected to the backrest assembly (13) and the seat assembly (14) respectively. The seat frame module (3) is provided on the top of the seat assembly (14) and is detachably connected to the upper end of the front support (11) and / or the backrest assembly (13).

2. The modular chair structure according to claim 1, characterized in that, The tray module (2) includes an inner circumference component (21) and a tray component (22). The inner circumference component (21) is disposed on the top of the seat component (14) and its rear end is detachably connected to the backrest component (13). The inner circumference component (21) has a cavity (211) that is open at both the top and the bottom. The front side wall of the inner circumference component (21) is provided with two front openings (212) that communicate with the cavity (211) and a downwardly extending baffle (213). The baffle (213) is located between the two front openings (212) and its lower end is detachably connected to the front end of the seat component (14). The tray component (22) is connected to the front side of the inner circumference component (21).

3. The modular chair structure according to claim 2, characterized in that, The plate assembly (22) and the inner circumference assembly (21) are integrally formed; or On the left and right sides of the rear end of the plate assembly (22), there are rearward extending and deformable connecting strips (221). The two connecting strips (221) are located on the left and right outer sides of the inner perimeter assembly (21), and the two connecting strips (221) are snap-fitted to the inner perimeter assembly (21).

4. The modular chair structure according to claim 2, characterized in that, The upper back of the inner circumference assembly (21) has a downward-opening upper slot (215), and the upper end of the backrest assembly (13) is inserted into the upper slot (215); and / or A lower slot (131) is provided at the bottom of the backrest assembly (13), and a rearwardly extending lower connecting part (216) is provided at the lower end of the back of the inner frame assembly (21). The lower connecting part (216) is located at the bottom of the backrest assembly (13) and engages with the lower slot (131).

5. A modular chair structure according to claim 2, characterized in that, A downwardly extending crossbeam (1411) is provided at the front end of the bottom of the seat assembly (14). The crossbeam (1411) has mounting holes (1412) that penetrate its front and rear side walls. The lower end of the baffle (213) is bent backward to form a connecting plate (2131). The connecting plate (2131) is transversely inserted through the mounting hole (1412) and snapped together with the crossbeam (1411).

6. The modular chair structure according to claim 1, characterized in that, The seat frame module (3) has downwardly extending mounting portions (31) at its left and right ends respectively; it also includes two adapters (4), the lower ends of which are detachably connected to the left and right sides of the upper end of the front bracket (11) and / or the left and right ends of the backrest assembly (13) respectively, and the upper ends of which are detachably connected to the two mounting portions (31) respectively.

7. A modular chair structure according to claim 6, characterized in that, The front bracket (11) has guide rail grooves (1121) on its left and right sides, each opening towards the adapter (4). The adapter (4) has a positioning protrusion (431) at the position corresponding to the guide rail groove (1121), and the positioning protrusion (431) is inserted into the guide rail groove (1121); and / or The lower end of the adapter (4) is detachably connected to the front bracket (11) by at least two fasteners. The upper end of the adapter (4) is inserted into the mounting part (31), and the upper end of the adapter (4) is detachably connected to the mounting part (31) by a quick-release structure (32) and / or at least two fasteners.

8. A modular chair structure according to claim 6 or 7, characterized in that, The adapter (4) includes an upper connecting section (41), a transition section (42) and a lower connecting section (43). The lower connecting section (43) is detachably connected to the front bracket (11) by at least two fasteners. The transition section (42) is integrally formed on the front side of the upper end of the lower connecting section (43). The upper connecting section (41) is integrally formed on the top of the transition section (42). The upper connecting section (41) is inserted into the mounting part (31) and is detachably connected to the mounting part (31) by a quick-release structure (32) and / or at least two fasteners.

9. A modular chair structure according to claim 1, characterized in that, The seat assembly (14) includes a fixed base (141) and a seat plate (142). The left and right ends of the fixed base (141) are respectively connected to the left and right sides of the upper end of the front bracket (11). The seat plate (142) is movably disposed on top of the fixed base (141), and the seat plate (142) and the fixed base (141) are detachably connected by at least two connectors or snap-fit ​​structures; and / or The rear support (12) is rotatably connected to the backrest assembly (13), and the rear support (12) and the backrest assembly (13) are locked or unlocked by a locking mechanism (15).

10. A modular chair structure according to claim 1 or 9, characterized in that, It also includes a foot pedal assembly (16) and / or a height adjustment mechanism (17), the foot pedal assembly (16) being disposed on the front support (11), and the foot pedal assembly (16) and / or the seat assembly (14) being connected to the front support (11) via the height adjustment mechanism (17).

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