Chair for children
By designing a brace and crotch post fixing assembly for high chairs, the problem of insufficient safety and convenience when fixing children in high chairs is solved, realizing a safe and convenient fixing and unlocking mechanism, and improving the user experience.
Patent Information
- Application Number
- CN202480047208.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-05-17
- Filing Date
- 2024-05-15
- Publication Date
- 2026-02-13
AI Technical Summary
Existing high chairs have shortcomings in terms of safety and convenience when securing children, especially in terms of inconvenience when getting in and out of the chair.
A fixing assembly including a web rod and a crotch post is designed, which achieves selective fixing through a connecting pin and an actuator. The web rod is slidable and separates from the seat, and the crotch post is pivotable, providing a safe and convenient fixing and unlocking mechanism.
It improves the safety and convenience of children in high chairs, simplifies the process of getting in and out of the chair, and enhances the ease of use and cleanability of the chair.
Smart Images
Figure CN121532093A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present disclosure relates to chairs for children, and in particular, but not exclusively, to high chairs for children which provide improved seating convenience for placing a child into a seat of the high chair. BACKGROUND
[0002] Young children are often placed in chairs, particularly high chairs, when eating or being fed. High chairs provide a comfortable seating position for a child to eat or to engage in other seated activities. High chairs are typically constructed such that a child seated in the high chair is at a similar height to an adult when seated. This can allow a child seated in the high chair to more easily interact with an adult seated at a table, and improves the convenience with which the seated adult can feed the child.
[0003] Due to the height of the seat of a high chair, it is important that the high chair includes suitable features to securely secure a child within the high chair. SUMMARY
[0004] According to one aspect of the present disclosure, there is provided a chair for a child, the chair comprising: a seat having a seat base for a child to sit on, a seat back, and a side wall on either lateral side of the seat base, and a securing assembly for selectively securing the child within the seat, the securing assembly comprising: a belly bar having a first end and a second end and a bar body extending therebetween, wherein the belly bar is configured to be coupled to respective side walls of the seat at the first and second ends such that the bar body extends between the side walls at a height above the seat base; and a crotch post having a first end and a second end, wherein the first end is coupled to the bar body of the belly bar and the second end is pivotally coupled to the seat base, wherein the belly bar is configured to be selectively decoupled from the side walls of the seat, and wherein the belly bar and the crotch post are configured to pivot about the second end of the crotch post in a direction away from the seat back.
[0005] The belly bar can include a first coupling pin and a second coupling pin disposed at the first end and the second end of the belly bar, respectively. The seat can include a first recess and a second recess formed in the side walls of the seat, respectively. The first coupling pin and the second coupling pin can be received within the first recess and the second recess, respectively, so as to couple the belly bar to the seat.
[0006] The securing assembly can include an actuator configured to selectively retract the first coupling pin and the second coupling pin into the bar body, thereby decoupling the belly bar from the seat.
[0007] The seat portion can include first and second protruding portions protruding inwardly from the first and second side walls, respectively. The first and second ends of the web can include channels for receiving the first and second protruding portions, respectively. The web can slide relative to the seat portion such that movement of the web relative to the seat portion is guided by engagement between the first and second protruding portions and the channels. The first and second protruding portions can be formed at least partially around the first and second recesses. The first and second coupling pins can be disposed within the channels.
[0008] The first and second protruding portions and / or the channels can be configured such that engagement between the first and second protruding portions and the channels guides sliding movement of the web to align the first and second coupling pins with the first and second recesses, respectively. For example, the first and second protruding portions and / or the channels can be configured such that engagement between the first and second protruding portions and the channels guides sliding movement of the web toward and away from the seat base. The securement assembly can be configured such that the web is coupled to the seat portion when the first and second protruding portions are received within the channels and the web is in a position closest to the seat base.
[0009] The first and second protruding portions and / or the channels can be configured such that engagement between the first and second protruding portions and the channels restricts or prevents the securement assembly from pivoting about the second end of the crotch post.
[0010] A length of the crotch post (e.g., between the first and second ends of the crotch post) can be selectively extendable. The crotch post can include a first portion extending from the first end toward the second end and a second portion extending from the second end toward the first end. The first portion can be slidably coupled to the second end to enable selective extension of the length of the crotch post.
[0011] One of the first and second portions can include a slot extending partially between the first and second ends, and the other of the first and second portions can include a pin received within the slot. Sliding of the first and second portions relative to one another can be guided and / or restricted by engagement between the pin and the slot.
[0012] The second end of the crotch post can be pivotally coupled to an underside of the seat base.
[0013] The actuator can be slidably coupled to the crotch post. The actuator can include a pair of guide surfaces. The coupling pin can include a guide surface engagement element configured to engage the guide surfaces. Sliding the actuator relative to the crotch post can cause the coupling pin to move due to the engagement between the guide surfaces and the guide pin.
[0014] The coupling pin can include a distal portion and a proximal portion. Distal ends of the distal portion of the coupling pin can be respectively received within the first recess and the second recess in order to couple the belly bar to the seat. The distal portion can be movably (e.g., slidably) coupled to the proximal portion. The distal portion can be biased to move to a position in which the distal portion can be respectively received by the first recess and the second recess. The guide surface engagement element can be disposed on the proximal portion of the coupling pin.
[0015] The distal portions of the first coupling pin and the second coupling pin can include angled surfaces. The angled surfaces can be configured to engage the first protruding portion and the second protruding portion when the belly bar is slid relative to the seat and to urge the respective distal portions away from the sidewall on which the corresponding protruding portion is formed.
[0016] In order to avoid unnecessary repetition of work and text in the description, a particular feature is only described with respect to one or several aspects or embodiments of the application. However, it is understood that a feature described with respect to any aspect or embodiment of the application can also be used with any other aspect or embodiment of the application, if technically possible. For example, a feature described with respect to a first mentioned aspect can be combined with the features of a second mentioned aspect. BRIEF DESCRIPTION OF DRAWINGS
[0017] For a better understanding of the present application, and to show how it can be put into effect, reference will now be made, by way of example, to the accompanying drawings in which:
[0018] Figure 1A is a front perspective view of a chair for a child according to an arrangement of the present disclosure;
[0019] Figure 1B is Figure 1A is a partial front view of the chair shown;
[0020] Figure 2 is Figure 1A is a partial front perspective view of the chair shown with the belly bar of the chair in a raised position;
[0021] Figure 3yes Figure 1A The partial front perspective view of the chair shown illustrates the chair's body rod in both the raised and forward positions;
[0022] Figure 4 yes Figure 3 The partial sectional view of the chair shown depicts the web bar in the holding position; and
[0023] Figure 5 It is used for Figure 1A The front perspective view of the chair's body rod shown reveals the internal components of the body rod. Detailed Implementation
[0024] refer to Figure 1A and Figure 1B The chair 100 arranged according to this disclosure includes a seat 110 having a seat base 112 for a child to sit on, a seat back 114, and first sidewalls 116a and second sidewalls 116b located on corresponding lateral sides of the seat base 112. The chair 100 may further include one or more legs 120 for supporting the seat on a surface on which the chair 100 is placed, such as a floor.
[0025] The chair 100 further includes a securing component 200 for selectively securing a child within the seat 110. Specifically, the securing component 200 can be positioned in a fixed location (in... Figure 1A and Figure 1B (shown in) and open position (in) Figure 3 As shown in the figure, in the fixed position, the fixing component 200 is used to secure the child within the seat 110, and in the open position, the fixing component 200 is positioned to improve access to the seat (compared to when the fixing component is in the fixed position), thereby improving the ease of putting the child into or taking the child out of the seat 110.
[0026] The fixing assembly 200 includes a belly rod 210 and a crotch post 250. As shown, the belly rod 210 includes a first end 210a and a second end 210b, and a rod body 212. The first end 210a and the second end 210b are connected to corresponding side walls 116a, 116b of the seat. The rod body 212 extends between the first end and the second end (e.g., across the seat 110). When the fixing assembly 200 is in a fixed position, the first end 210a and the second end 210b of the belly rod can be connected to the corresponding side walls 116a, 116b of the seat. As shown, when the first end 210a and the second end 210b of the belly rod are connected to the seat, a leg space 102 is created below the belly rod 210 (e.g., between the belly rod and the seat base 112) for a child's legs to pass through when the child is sitting on the seat base. When a child is seated on the seat 110 and the securing component 200 is in a fixed position, the rod can extend across the child's thigh area, such as in front of the child's abdomen, to at least partially secure the child within the seat 110.
[0027] The crotch post 250 includes a first end 250a and a second end 250b. The first end 250a of the crotch post is connected to the body 212 of the web member. Specifically, the first end 250a of the crotch post can be connected to the body 212 at a central position on the body between the first end 210a and the second end 210b of the web member. The second end 250b of the crotch post is pivotally connected to the base 112 of the seat. Brief Reference Figure 4 The second end 250b of the crotch post can be pivotally connected to the lower side of the seat base 112. As shown, the crotch post may include a portion 254a that extends below the lower side of the seat to the position on the lower side of the seat base where the crotch post is connected.
[0028] By attaching the fastening components 200 (e.g., the belly bar 210 and the crotch post 250) to the seat 110 in the manner disclosed herein, the inner surface of the seat can be smooth, for example, without sharp corners and / or discrete changes in direction across the entire surface. Additionally or alternatively, when the fastening components 200 are in the open position, there may be no gap between the inner surface of the seat and the components attached to the seat 110. The chair 100 described herein can thus be configured to improve the ease of cleaning the inner surface of the seat 110, for example, when the fastening components 200 are in the open position.
[0029] The crotch post 250 can extend from the belly post 210 at an angle of approximately 90° relative to the rod 212 (e.g., in the direction in which the rod primarily extends across the base). For example, the rod 212 can extend across the base 110 in a lateral direction, and the crotch post 250 can extend between the belly post 210 and the base 112 in a direction with a vertical component (e.g., substantially vertical). As described above, the first end 250a of the crotch post can be connected to the rod 212 at a central location on the rod between the first and second ends. Thus, the crotch post can divide the leg space 102 below the belly post in the lateral direction to create a sub-space for a child's corresponding legs to pass through on either side of the crotch post 250.
[0030] refer to Figure 2 and Figure 3 The web member 210 (e.g., the first end 210a and the second end 210b of the web member) is configured to selectively separate from the side walls 116a, 116b of the seat, and the web member 210 and the crotch post 250 are configured to pivot about the second end 250b of the crotch post in a direction away from the backrest of the seat. Therefore, the fixing assembly 200 can be arranged in the open position (e.g., ...). Figure 3 As shown, this improves the convenience of placing or removing a child from the seat 110.
[0031] refer to Figure 2 and Figure 5 The web member 210 may include a first connecting pin 220 and a second connecting pin 230 respectively disposed at a first end 210a and a second end 210b of the web member, and the seat portion 110 may include a first recess 118a and a second recess 118b formed in corresponding sidewalls 116a and 116b of the seat portion. Specifically, the first connecting pin 220 and the second connecting pin 230 (e.g., the distal ends 220a and 230a of the first connecting pin and the second connecting pin) may be received in the first recess 118a and the second recess 118b respectively, so as to connect the web member 210 to the seat portion 110.
[0032] The fixing assembly 200 may further include an actuator 260, such as a button or slider, which can be actuated by a user (e.g., pressed or slid) to retract the first connecting pin 220 and the connecting pin 230 into the rod body 212 of the web. As shown, the actuator 260 may be formed on the crotch post 250. When the first connecting pin 220 and the second connecting pin 230 are retracted into the web, the connecting pins (e.g., the distal ends 220a, 230a of the connecting pins) are no longer received in the recesses 118a, 118b. Therefore, the web 210 can be separated from the seat 110. Thus, the actuator 260 allows the web 210 to be separated from the seat 110 using one hand. Therefore, the user can use one hand to move the fixing assembly 200 from the fixed position to the open position.
[0033] The crotch post 250 can be configured such that the length of the crotch post between the first end 250a and the second end 250b can be in the extension direction D. E The crotch post 250 can be selectively extended. As described herein, the length of the crotch post 250 can be extended or retracted as part of a process for moving the fixing assembly 200 between a fixed position and an open position. As shown, the crotch post 250 may include a first portion 252 extending from a first end 250a toward a second end 250b, and a second portion 254 extending from the second end 250b toward the first end 250a. The first portion 252 and the second portion 254 may be coupled together such that the first portion 252 is movable (e.g., slides) relative to the second portion 254, thereby extending the length of the crotch post 250 between the first and second ends. In other words, the first portion 252 and the second portion 254 of the crotch post can be slidably coupled to each other. For example, as Figure 5 As shown, one of the first and second portions (such as the second portion 254) may be received in an opening 252a formed in the other of the first and second portions (such as the first portion 252). One of the first and second portions (such as the second portion 254) may slide into and out of an opening 253a formed in the other of the portions (such as the first portion 252).
[0034] One of the first portion 252 and the second portion 254 of the groin post may include a slot 254b, and the other of the first and second portions may include a pin 252b received within the slot. The slot 254b may extend a certain distance in the direction in which the first portion 252 and the second portion 254 slide relative to each other. Therefore, the engagement between the pin 252b and the slot 254b can guide the sliding movement of the first portion 252 and the second portion 254 relative to each other. In particular, the range of movement of the first portion 252 relative to the second portion 254 may be limited by the length of the slot 254b. In other words, when the pin 252b reaches the end of the slot 254b, further relative movement of the first portion 252 and the second portion 254 in the corresponding direction can be restricted or prevented.
[0035] In other arrangements, the crotch post 250 may include features for guiding and limiting the sliding movement of the first portion 252 and the second portion 254 of the crotch post and / or any other features for selectively extending the length of the crotch post.
[0036] Return to Figure 2 and Figure 3The seat portion 110 may include a first protrusion 120a and a second protrusion 120b projecting inwardly from a first sidewall 116a and a second sidewall 116b, respectively. The web member 210 may include channels 214 and 216 formed at the first end 210a and the second end 210b, respectively. Channels 214 and 216 may include a closed end 216a and an open end 216b, and a channel wall 216c extending between the closed end and the open end. The fixing assembly 200 may be configured such that the web member 210 is movable relative to the seat portion, such that the protrusions 120a and 120b enter the respective channels 214 and 216 through their open ends.
[0037] The first protrusion 120a and the second protrusion 120b, as well as the channels 214 and 216, can be configured such that when the first and second protrusions are received within their respective channels, the engagement of the protrusions with the channel wall 216c guides the movement of the strut 210 relative to the seat 110. The channels 214 and 216 (e.g., channel walls) can be positioned in the direction of extension D of the crotch post 250. E Extending in a substantially parallel direction. The sliding movement of the belly rod 210 relative to the seat 110 (e.g., when the protrusions 120a, 120b are received within the channels 214, 216) can be facilitated by the extension / retraction of the crotch post 250.
[0038] The protrusions 120a, 120b and channels 214, 216 can be configured to guide the strut 210 to a position in which the first connecting pin 220 and the second connecting pin 230 can be received within recesses 118a, 118b formed in the respective sidewalls 116a, 116b of the seat. The chair 100 can be configured such that when the protrusions 120a, 120b are received (e.g., fully received) within channels 214, 216, the first connecting pin 220 and the second connecting pin 230 are aligned with the recesses 118a, 118b. For example, when the protrusions 120a, 120b are at (e.g., in contact with) the closed end 216a of the respective channel, the first connecting pin 220 and the second connecting pin 230 can be aligned with the recesses 118a, 118b.
[0039] As shown in the figure, channels 214, 216 and protrusions 120a, 120b can be configured to guide the movement of the web rod 210 toward and away from the seat base 112 (e.g., sliding movement). For example, the channels and protrusions can be configured to guide the movement of the web rod in the vertical direction (e.g., sliding movement). When the web rod 210 is in the position closest to the seat base 112, the first connecting pin 220 and the second connecting pin 230 can be aligned with the corresponding recesses 118a, 118b.
[0040] refer to Figure 2 and Figure 4The channel wall 216c can be aligned with the pivot axis A. P Extending vertically, the fixed component 200 can rotate about the pivot axis A. P And it pivots relative to the seat 110. Therefore, when the protrusions 120a and 120b are received within the channels 214 and 216, the engagement between the protrusions and the channel walls can limit or prevent the fixing assembly 200 from pivoting relative to the seat 110. Figure 2 As shown, in order to move the fixing component 200 from the fixed position to the open position, the web rod 210 can be moved (e.g., raised to the raised position) so that the protrusions 120a, 120b are no longer received in the channels 214, 216, so that the fixing component 200 can pivot forward, for example away from the seat backrest 114.
[0041] In the arrangement depicted in the accompanying drawings, protrusions 120a and 120b are formed at least partially around recesses 180a and 180b. Furthermore, connecting pins 220 and 230 (e.g., distal ends 220a and 230a of the connecting pins) are arranged within channels 214 and 216. However, in other arrangements, protrusions 120a and 120b may be spaced apart from recesses 118a and 118b. In such an arrangement, connecting pins 220 and 230 may be spaced apart from channels 214 and 216. Furthermore, in other arrangements, protrusions 120a and 120b may be formed at the first end 210a and the second end 210b of the web member, and channels 214 and 216 may be formed in the seat portion 110.
[0042] return Figure 5The connecting pins 220 and 230 may include distal portions 222 and 232 and proximal portions 224 and 234. The distal ends 222a and 232a of the distal portions of the connecting pins may be received within recesses 118a and 118b. The distal portions 222 and 232 of the connecting pins may be connected to the proximal portions 224 and 234 at their proximal ends 222b and 232b. The distal portions 222 and 232 of the connecting pins may be slidably connected to the proximal portions 224 and 234. In particular, the distal portions may slide relative to the proximal portions in a direction toward and away from the sidewalls 116a and 116b of the seat (e.g., perpendicular to the sidewalls), which may be the lateral direction of the chair 100. Therefore, the distal portions 222, 232 can slide relative to the proximal portions 224, 234 in the direction of entering and exiting the respective recesses 118a, 118b on the respective sidewalls of the seat. The connecting pins 220, 230 may include a biasing member 238 (such as a coil spring) configured to bias the distal portions 222, 232 in the direction toward the respective sidewalls 116a, 116b of the seat. In other words, the distal portions 222, 232 can be biased outward relative to the web 210. Thus, the distal portions are biased such that the distal ends 222a, 232a of the distal portions are received within the respective recesses 118a, 118b.
[0043] The distal ends 222a, 232a of the distal portions may include angled surfaces 222c, 222c. The angled surfaces may be arranged such that when the web rod 210 moves (e.g., slides) relative to the seat portion 110 (e.g., toward the position where the connecting pins 220, 230 are aligned with the recesses 118a, 118b), the angled surfaces engage with the corresponding protrusions 120a, 120b and cause the distal portions 222, 232 to move away from the corresponding sidewalls 116a, 116a of the seat portion (e.g., in the inward direction of the chair), so that the connecting pins 220, 230 can move past the protrusions 120a, 120b.
[0044] like Figure 5 As shown, actuator 260 may include a button movably (e.g., slidably) coupled to crotch post 250. Specifically, actuator 260 may be positioned relative to a first portion 252 and / or a second portion 254 of crotch post in the actuation direction D. A Slide upwards. As shown in the figure, the actuator 260 can be disposed on the first portion 252 of the crotch post, for example, it can be movably connected to the first portion 252 of the crotch post.
[0045] Actuator 260 includes one or more (e.g., a pair) guide surfaces 262. As shown, the guide surfaces may include guide grooves. First coupling pin 220 and second coupling pin 230 may include guide surface engagement elements 226, 236 (such as guide pins) configured to engage one or more guide surfaces 262 (e.g., corresponding guide surfaces in a pair of guide surfaces). For example, a guide pin may be received within a corresponding guide groove. As shown, guide surface engagement elements 226, 236 may be disposed (e.g., formed) on proximal portions 224, 234 of the coupling pins. One or more guide surfaces 262 may be positioned relative to the actuation direction D. A An angle is formed, such that the actuator 260 is, for example, in the actuation direction D. A The movement causes the guide surface 262 to engage the guide surface engagement elements 226, 236 and causes the connecting pins 220, 230 to move. Specifically, for example, in the actuation direction D... A The upward-moving actuator can cause the connecting pins 220, 230 to move toward or away from the corresponding sidewalls 116a, 116b of the seat. The fixing assembly 200 may include an actuator biasing member 256 (such as a coil spring) configured to bias the actuator 260 in the direction in which the connecting pins 220, 230 move toward the corresponding sidewalls 116a, 116b of the seat, for example, into the recesses 118a, 118b.
[0046] Those skilled in the art will understand that although the invention has been described by way of example with reference to one or more exemplary embodiments, the invention is not limited to the disclosed embodiments and alternative embodiments may be constructed without departing from the scope of the invention as defined by the appended claims.
Claims
1. A chair for children, said chair comprising: A seat having a seat base, a seat back, and a sidewall on any lateral side of the seat base, the seat base being used for a child to sit on; as well as A restraint assembly for selectively securing a child within the seat, the restraint assembly comprising: A web member having a first end and a second end, and a rod extending between the second end, wherein the web member is configured to connect to corresponding sidewalls of the seat at the first end and the second end, such that the rod extends between the sidewalls at a height above the base of the seat; and A crotch post having a first end and a second end, wherein the first end is connected to the body of the web member, and the second end is pivotally connected to the base of the seat portion, wherein the web member is configured to selectively separate from the sidewall of the seat portion, and wherein the web member and the crotch post are configured to pivot about the second end of the crotch post in a direction away from the backrest of the seat portion.
2. The chair according to claim 1, wherein, The web member includes a first connecting pin and a second connecting pin respectively disposed at the first end and the second end of the web member, wherein the seat includes a first recess and a second recess respectively formed in the side wall of the seat, wherein the first connecting pin and the second connecting pin can be received in the first recess and the second recess respectively, so as to connect the web member to the seat.
3. The chair according to claim 2, wherein, The fixing assembly includes an actuator configured to selectively retract the first and second connecting pins into the rod body, thereby separating the web rod from the seat.
4. The chair according to any one of the preceding claims, wherein, The seat includes a first protruding portion and a second protruding portion that project inwardly from the first sidewall and the second sidewall, respectively, wherein the first end and the second end of the web member include channels for receiving the first protruding portion and the second protruding portion, respectively, and wherein the web member is slidable relative to the seat, such that movement of the web member relative to the seat is guided by engagement between the first protruding portion and the second protruding portion and the channels.
5. The chair according to claim 4, wherein, The first protruding portion and the second protruding portion are formed at least partially around the first recess and the second recess.
6. The chair according to claim 4 or 5 when subordinate to claim 2, wherein, The first connecting pin and the second connecting pin are arranged within the channel.
7. The chair according to any one of claims 4 to 6 when dependent on claim 2, wherein, The first protrusion and the second protrusion and / or the channel are configured such that the engagement between the first protrusion and the second protrusion and the channel guides the sliding movement of the web rod so that the first connecting pin and the second connecting pin are aligned with the first recess and the second recess, respectively.
8. The chair according to any one of claims 4 to 7, wherein, The first protrusion and the second protrusion and / or the channel are configured such that the engagement between the first protrusion and the second protrusion and the channel guides the sliding movement of the web rod toward and away from the base of the seat.
9. The chair according to claim 8, wherein, The fastening assembly is configured such that when the first and second protrusions are received within the channel and the web is in the position closest to the base of the seat, the web is engaged with the seat.
10. The chair according to any one of claims 4 to 9, wherein, The first protrusion and the second protrusion and / or the channel are configured such that the engagement between the first protrusion and the second protrusion and the channel restricts or prevents the fixing assembly from pivoting about the second end of the crotch post.
11. The chair according to any one of the preceding claims, wherein, The length of the crotch post between the first end and the second end of the crotch post is selectively extendable.
12. The chair according to claim 11, wherein, The crotch post includes a first portion and a second portion, the first portion extending from the first end toward the second end, and the second portion extending from the second end toward the first end, wherein the first portion is slidably connected to the second end so that the length of the crotch post can be selectively extended.
13. The chair according to claim 12, wherein, One of the first portion and the second portion includes a slot that extends partially between the first end and the second end, and the other of the first portion and the second portion includes a pin received within the slot.
14. The chair according to any one of the preceding claims, wherein, The second end of the crotch post is pivotally connected to the lower side of the base of the seat.
15. The chair according to claim 3 or when dependent on claim 3 in any of claims 4 to 14, wherein, The actuator is slidably coupled to the crotch post, wherein the actuator includes a pair of guide surfaces, wherein the coupling pin includes guide surface engagement elements configured to engage the guide surfaces, and wherein sliding the actuator relative to the crotch post causes the coupling pin to move due to the engagement between the guide surfaces and the guide pin.
16. The chair according to claim 2 or when dependent on claim 2 in any of claims 3 to 15, wherein, The connecting pin includes a distal portion and a proximal portion, wherein the distal end of the distal portion of the connecting pin can be received in the first recess and the second recess respectively, so as to connect the web to the seat, wherein the distal portion is movably connected to the proximal portion, and wherein the distal portion is biased to move to a position in which the distal portion can be received by the first recess and the second recess respectively.
17. The chair according to claim 16 when dependent on claim 15, wherein, The guide surface engagement element is disposed on the proximal portion of the connecting pin.
18. The chair according to claim 16 or 17 when dependent on claim 4, wherein, The distal portions of the first and second connecting pins include angled surfaces, wherein the angled surfaces are configured to engage with the first and second protrusions when the web rod slides relative to the seat, and to cause the respective distal portions to move away from the sidewall on which the corresponding protrusions are formed.