Folding heightening stool with backrest

Abstract

The utility model discloses a folding heightening stool with a backrest. The folding heightening stool comprises a base, the lifting assembly is mounted above the base and comprises a plurality of bearing rings which are sequentially nested and assembled from outside to inside, and a lifting locking structure is arranged between every two adjacent bearing rings; the stool panel is mounted above the lifting assembly; the backrest is rotationally mounted at the rear end of the stool panel; the lifting locking structure is provided with a locking position and an unlocking position and is switched through the same-direction circumferential rotation of all the bearing rings, the backrest is rotationally installed at the rear end of the stool face plate, in the using state, the backrest needs to be turned upwards to form a certain included angle with the stool face plate, and then backrest support can be provided for a user; on the premise that the folding storage function is not affected, the sitting experience feeling of a user is better, in addition, by arranging a connecting groove set, a sliding block and a bearing wedge on the lifting assembly, the bearing capacity of the stool body can be effectively improved, the upper end of the stool panel is designed to be of a wave-shaped structure, and the comfort of a cushion can be improved while the backrest function is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of stools, in particular to a foldable height-increasing stool with a backrest. Background Art

[0002] A stool is a commonly used item at home or when going out. For example, when people are traveling, taking a train, or standing in a queue for a long time, they often need to sit or rest. In order to reduce the space occupied, people usually carry a folding stool with them.

[0003] In the prior art, a relatively common folding stool adopts a telescopic structure. The stool includes a base and a stool panel located above the base. A split load-bearing ring is provided between the base and the stool panel. The load-bearing rings are at least two layers, and the load-bearing rings are nested in pairs. Adjacent load-bearing rings are vertically slidably connected. The innermost load-bearing ring is connected to the stool panel by a buckle, and the outermost load-bearing ring is connected to the base by a buckle. However, the above-mentioned folding stool has the following technical defects:

[0004] 1. When the stool is unfolded, people can sit on the stool panel to rest, but because it does not provide a backrest function, the muscles are always tense during long periods of sitting, which increases the load on the lumbar spine, easily causing low back pain, muscle strain and fasciitis, and more easily causing fatigue;

[0005] 2. The connection stability between adjacent load-bearing rings is an important indicator for testing load-bearing capacity. Although existing folding stools are equipped with multiple sliding buckles around the load-bearing rings, the buckles are not densely designed and the load-bearing capacity is average.

[0006] 3. The stool panel is generally straight or padded, but if you sit for a long time, your buttocks will feel uncomfortable.

[0007] 4. During the folding process, it is quite laborious because multiple load-bearing rings need to be pressed down at the same time. Utility Model Content

[0008] In order to solve the above problems, the utility model provides a foldable height-increasing stool with a backrest.

[0009] The technical solution adopted by the utility model is: a foldable height-increasing stool with a backrest, comprising:

[0010] base;

[0011] The lifting assembly is installed above the base and includes a plurality of load-bearing rings that are nested and assembled from the outside to the inside, and a lifting locking structure is provided between adjacent load-bearing rings;

[0012] The stool panel is installed above the lifting assembly;

[0013] A backrest is rotatably mounted on the rear end of the bench panel and has a storage state in which it abuts against the upper portion of the bench panel, and a use state in which it is rotated upward away from the bench panel. In the use state, a positioning structure for cooperating and fixing the position of the backrest is provided between the backrest and the bench panel;

[0014] The lifting locking structure has a locking position and an unlocking position, and is switched by the same-direction circumferential rotation of all the load-bearing rings. In the use state, the adjacent load-bearing rings are pulled apart from each other to the farthest ends, and the lifting locking structure is in the locking position, fixing the relative positions of all the load-bearing rings; in the storage state, the lifting locking structure is switched to the unlocking position, and all the load-bearing rings are lowered to the height of the lowest load-bearing ring. The stool panel and the base cooperate to cover the lifting assembly.

[0015] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution. They are merely further supplements or optimizations. Under the premise that there are no technical or logical contradictions, each optional method can be combined separately for the above-mentioned overall solution, or multiple optional methods can be combined.

[0016] Preferably, the rear end of the bench panel is provided with at least one rotation position, and one end of the backrest is provided with at least one rotating member for cooperating with and rotating with the rotation position.

[0017] Preferably, the positioning structure is at least one stop bar and at least one clamping bar fixed to the rear end of the upper end surface of the stool panel, the stop bar is located in front of the clamping bar, and the height of the stop bar is greater than the height of the clamping bar. An extension piece is provided at one end of the backrest close to the rotating part, and when in use, the lower end of the extension piece is clamped between the stop bar and the clamping bar.

[0018] Preferably, the rotating position includes a plurality of adapter plates uprightly fixed above the rear end of the stool panel, the rotating member is provided with a plurality of partitions arranged at intervals from each other, and a plurality of notches for the adapter plates to extend into, the adapter plates are arranged between adjacent partitions, and the rotating member is provided with an axle rod, which passes through all the partitions and all the adapter plates at the same time. In use, the rear end of the adapter plate abuts against the rear inner wall of the rotating member, and together with the stop strip and the card strip, forms the positioning structure.

[0019] Preferably, at least one positioning block is provided on the upper end surface of the stool panel, and at least one positioning groove is provided on the front end surface of the backrest. In the storage state, the positioning block is matched and snapped into the positioning groove.

[0020] Preferably, the upper end surface of the stool panel extends in a wave shape and has a crest and two troughs, the two troughs are respectively located on the left and right sides of the crest, and the height of the crest is greater than the height of the trough.

[0021] Preferably, at least one downwardly recessed space is provided on the upper end surface of the stool panel, and a through opening is provided on the backrest. In the storage state, the through opening corresponds to the at least one empty space and cooperates to form a gripping position for human hand to grasp.

[0022] Preferably, the load-bearing ring includes a lower load-bearing ring fixed on the base, an upper load-bearing ring fixed on the stool panel, and several intermediate load-bearing rings arranged between the upper load-bearing ring and the lower load-bearing ring. The lifting and lowering locking structure includes a plurality of connecting groove groups arranged at intervals along the circumference of the intermediate load-bearing ring or the lower load-bearing ring, and a plurality of sliders fixed at the lower end of the intermediate load-bearing ring or the upper load-bearing ring. Each connecting groove group includes a plurality of connecting grooves arranged at intervals from each other. The connecting grooves include a positioning part and a guide part. The positioning part is arranged on one side of the upper end of the guide part and forms a bending structure. The guide part extends vertically. The slider is slid into the connecting groove. In the use state, the slider is placed in the positioning part and forms a locking position. In the storage state, the slider is disengaged from the positioning part and moves horizontally to the lowermost end of the guide part.

[0023] Preferably, the upper end surfaces of the intermediate load-bearing ring and the lower load-bearing ring are provided with a number of recessed positions spaced apart from each other and recessed downwardly along their circumferences, and a notch is provided at the bottom end of the recess. The lower ends of the outer walls of the intermediate load-bearing ring and the upper load-bearing ring are provided with a plurality of load-bearing wedges. In the use state, of the two adjacent load-bearing rings, the load-bearing wedges on the upper load-bearing ring abut against the bottom end of the recessed position of the lower load-bearing ring. In the process of switching from the use state to the storage state, the load-bearing wedges on the upper load-bearing ring pass through the notch from above the bottom end of the recessed position of the lower load-bearing ring to below the notch.

[0024] More preferably, the upper load-bearing ring is fixed below the stool panel by means of a plurality of clamping blocks and clamping slots, and the lower load-bearing ring is fixed above the base by means of a plurality of clamping blocks and clamping slots, at least one vertically placed tension spring is provided between the base and the stool panel, and a handle ring is provided on the stool panel or the base.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. By rotating the backrest at the rear end of the stool panel, when in use, the backrest needs to be flipped upward to form a certain angle with the stool panel, thereby providing back support for the user. Without affecting the folding and storage function, the user's sitting experience is better;

[0027] 2. The lower load-bearing ring and each intermediate load-bearing ring are provided with multiple connecting groove groups, and each connecting groove group is provided with three connecting grooves for sliding installation of the slider. When in use, the slider is clamped on the positioning part of the connecting groove. By designing the connecting groove group, the local load-bearing capacity can be greatly increased, thereby increasing the overall load-bearing capacity of the stool body;

[0028] 3. By arranging load-bearing wedges at the lower ends of the outer walls of the upper and middle load-bearing rings, the load-bearing wedges on the upper load-bearing rings will abut against the upper ends of the lower load-bearing rings when in use, thereby further increasing the load-bearing capacity of the stool body.

[0029] 4. The upper end of the stool panel is designed with a wave-shaped structure, which is more ergonomic and makes users more comfortable to sit on;

[0030] 5. There are multiple tension springs between the base and the stool panel, which can help users fold and store all the load-bearing rings more easily;

[0031] 6. The outer contour of the base is designed to be square, which can increase the overall stability of the placement when in use and prevent it from tipping over due to lateral force. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0033] Figure 1 This is a front-side overall structural diagram of an embodiment of the present application in use;

[0034] Figure 2 This is a diagram of the overall structure from a rear side perspective in use in one embodiment of the present application;

[0035] Figure 3 This is a front-side overall structural diagram of an embodiment of the present application in the retracted state;

[0036] Figure 4 This is a diagram of the overall structure from a rear side perspective in the retracted state in one embodiment of the present application;

[0037] Figure 5 This is a bottom side view of the overall structure of one embodiment of the present application in the retracted state;

[0038] Figure 6This is a structural diagram of an embodiment of the present application in a stowed state, with the backrest hidden and the upper pad explosively separated;

[0039] Figure 7 This is a structural diagram of a backrest in one embodiment of the present application;

[0040] Figure 8 This is an exploded schematic diagram of a stool panel and a backrest in a use state in one embodiment of the present application;

[0041] Figure 9 This is a structural diagram of the backrest after the splicing panels are disassembled and separated in one embodiment of the present application;

[0042] Figure 10 This is a schematic diagram of the structure of a stool panel from a bottom perspective in one embodiment of the present application;

[0043] Figure 11 This is a schematic diagram of the structure of the base from an upper side perspective in one embodiment of the present application;

[0044] Figure 12 This is a schematic diagram of the structure from a lower side perspective after the base hides the lower pad in one embodiment of the present application;

[0045] Figure 13 This is a structural diagram of the lower pad in one embodiment of the present application;

[0046] Figure 14 This is an overall structural diagram from the bottom side of the hidden base in the storage state in one embodiment of the present application;

[0047] Figure 15 This is a structural diagram of an upper load-bearing ring in one embodiment of the present application;

[0048] Figure 16 This is a structural diagram of the lower bearing ring in one embodiment of the present application;

[0049] Figure 17 This is an assembly structure diagram of two adjacent middle load-bearing rings in use in one embodiment of the present application;

[0050] Figure 18 This is an assembly structure diagram of two adjacent middle load-bearing rings in the storage state in one embodiment of the present application;

[0051] Figure 19 This is a schematic diagram of the structure after two adjacent middle load-bearing rings are explosively separated in one embodiment of the present application;

[0052] Figure 20 This is a diagram of the overall structure after all the load-bearing rings are hidden in one embodiment of the present application.

[0053] The following are marked as follows: 1-base, 11-sleeve groove, 12-first bayonet, 13-boss, 131-second bayonet, 132-allowance, 133-first groove, 134-first concave member, 135-second concave member, 14-lower connecting plate, 141-first block, 142-first inverted member, 143-first matching ring, 144-second matching ring, 15-sealing plate, 16-fixed block, 2-lower Connect the bearing ring, 21-first connecting notch, 22-second block, 23-first concave, 231-first notch, 3-middle bearing ring, 31-second connecting notch, 311-positioning part, 312-guide part, 313-inner notch, 314-outer notch, 32-first slider, 321-first inner block, 322-first outer block, 33-first bearing wedge, 34-second concave, 341-second Notch, 4-upper load-bearing ring, 41-flange, 42-third block, 43-second slider, 431-second inner block, 432-second outer block, 44-second load-bearing wedge, 5-stool panel, 51-adapter, 52-positioning block, 53-connecting ring, 531-third bayonet, 532-abutment block, 54-second groove, 541-fourth bayonet, 542-third concave piece, 543-fourth concave piece, 55-upper connecting plate, 551-fourth clamping block, 552-third matching ring, 553-fourth matching ring, 56-stop strip, 57-clamping strip, 58-second inverted fastener, 6-backrest, 61-rotating part, 613-partition, 612-notch, 613-axis rod, 62-positioning groove, 63-extension piece, 64-through mouth, 65-splicing plate, 651-opening, 66-rib, 7-handle ring, 8-tension spring.

[0054] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0056] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0057] Furthermore, the terms "first," "second," and so on, used in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include at least one such feature. Furthermore, the technical solutions of various embodiments may be combined, but only if they are achievable by persons of ordinary skill in the art. If a combination of technical solutions contradicts or is unachievable, such combination shall be deemed non-existent and outside the scope of protection claimed by this utility model.

[0058] Specific implementation plan: see Figures 1-20 The utility model is a foldable height-increasing stool with a backrest, comprising:

[0059] Base 1;

[0060] The lifting assembly is installed above the base 1 and includes a plurality of load-bearing rings that are nested and assembled from the outside to the inside, and a lifting locking structure is provided between adjacent load-bearing rings;

[0061] The stool panel 5 is installed above the lifting assembly;

[0062] The backrest 6 is rotatably mounted on the rear end of the stool panel 5 and has a storage state abutting against the top of the stool panel 5 and a use state in which it is rotated upward away from the stool panel 5. In the use state, a positioning structure for cooperating and fixing the position of the backrest 6 is provided between the backrest 6 and the stool panel 5;

[0063] The lifting locking structure has a locking position and an unlocking position, and is switched by the same-direction circumferential rotation of all the load-bearing rings. In the use state, the adjacent load-bearing rings are pulled apart from each other to the farthest ends, the lifting locking structure is in the locking position, and the relative positions of all the load-bearing rings are fixed; in the storage state, the lifting locking structure is switched to the unlocking position, and all the load-bearing rings are lowered to the height of the lowest load-bearing ring. The stool panel 5 and the base 1 cooperate to cover the lifting assembly.

[0064] For ease of understanding and description below, in this embodiment, the base 1, the lifting assembly and the stool panel 5 are collectively named as the stool body, which is equivalent to the backrest 6 being rotatably installed on the rear side of the upper end of the stool body.

[0065] As a preferred implementation of this embodiment, the rear end of the stool panel 5 is provided with at least one rotation position, and one end of the backrest 6 is provided with at least one rotating member 61 for matching and rotating the rotation position.

[0066] Then, see Figure 6 and Figure 7It can be seen that in this embodiment, the rotating position includes several adapter plates 51 upright and fixed above the rear end of the stool panel 5, and the rotating member 61 is provided with several partitions 613 arranged at intervals from each other, and several notches 612 for the adapter plates 51 to extend into. The adapter plates 51 are arranged between adjacent partitions 613, and the rotating member 61 is penetrated by a shaft rod 613, which passes through all the partitions 613 and all the adapter plates 51 at the same time. In the use state, the rear end of the adapter plate 51 abuts against the rear inner wall of the rotating member 61, and forms a positioning structure together with the stop strip 56 and the card strip 57.

[0067] See also Figure 1 、 Figure 2 and Figure 4 As can be seen, in this embodiment, there are two rotation positions, which are respectively arranged on the left and right sides of the rear end of the stool panel 5. The following is an explanation of the assembly method of the rotating member 61 and the rotation position:

[0068] To install the rotating member 61 in the corresponding rotational position, all that is required is to insert all adapter plates 51 through the notches 612 into the gaps between adjacent partitions 613. Both the adapter plates 51 and the partitions 613 are provided with through-holes. By inserting the shaft 613 through all of the through-holes in the adapter plates 51 and the partitions 613, the rotating member 61 can be installed in the rotational position. Furthermore, the provision of the notches 612 allows for smooth relative rotation between the adapter plates 51 and the rotating member 61.

[0069] See also Figure 2-Figure 4 、 Figure 6 and Figure 7 It can be seen that in this embodiment, the positioning structure is at least one stop bar 56 and at least one clamping bar 57 fixed to the rear end of the upper end surface of the stool panel 5. The stop bar 56 is located in front of the clamping bar 57, and the height of the stop bar 56 is greater than the height of the clamping bar 57. An extension piece 63 is provided at one end of the backrest 6 close to the rotating member 61. When in use, the lower end of the extension piece 63 is clamped between the stop bar 56 and the clamping bar 57.

[0070] In this embodiment, two stop bars 56 and two clamping bars 57 are provided. When the backrest 6 needs to be switched from the stowed state to the use state, the backrest 6 is manually flipped upward. During the upward flipping process, the extension piece 63 will first pass through the clamping bar 57. Because the clamping bar 57 is relatively low and the extension piece 63 is made of plastic, the extension piece 63 slightly deforms, passes over the clamping bar 57, and abuts against the rear end of the stop bar 56. The provision of the stop bar 56 prevents the backrest 6 from further flipping backward. The provision of the clamping bar 57 requires the user to apply a little force to flip the backrest 6 back upward and switch it back to the stowed state.

[0071] In addition, when in use, the adapter plate 51 abuts against the rear inner wall of the rotating member 61, and then cooperates with the stop bar 56 to fix the rotation position of the backrest 6. At this time, the backrest 6 has a large pressure bearing capacity and can be safely leaned on by the user.

[0072] Then, see Figure 1 It can be seen that in this embodiment, a positioning block 52 is provided on the left and right sides of the rear position of the upper end surface of the stool panel 5, and a positioning groove 62 is provided on the left and right sides of the lower position of the front end surface of the backrest 6. In the storage state, the positioning block 52 is matched and snapped into the positioning groove 62.

[0073] Here, the arrangement of the positioning block 52 and the positioning groove 62 allows the backrest 6 and the stool panel 5 to be fixed to each other in the stowed state, and the backrest 6 can only be separated from the stool panel 5 under a certain external force. In this way, when the foldable height-enhancing stool of this embodiment is taken away by the handle ring 7 (described below), there is no need to worry about the backrest 6 suddenly flipping off the stool panel 5 in the stowed state.

[0074] Next, see Figure 6 and Figure 8 It can be seen that in this embodiment, the upper end surface of the stool panel 5 extends in a wave shape and has a crest and two troughs, the two troughs are respectively located on the left and right sides of the crest, and the height of the crest is greater than the height of the trough.

[0075] Here, the upper end surface of the stool panel 5 is designed to be a wave-shaped structure with one peak and two valleys, which is more ergonomic and thus improves the user's seat comfort.

[0076] See also Figure 6 It can be seen that in this embodiment, two downwardly concave spaces are provided on the upper end surface of the stool panel 5, and a through opening 64 is provided on the backrest 6. In the storage state, the through opening 64 and the two spaces correspond to each other in position and cooperate to form a gripping position for human hands to grasp.

[0077] The following describes how the empty space on the upper end surface of the stool panel 5 is formed:

[0078] In this embodiment, the stool panel 5 is provided with a second groove 54, into which an upper backing plate 55 is mounted. The inner edge of the second groove 54 is provided with a plurality of spaced fourth latches 541, and the outer edge of the upper backing plate 55 is provided with a plurality of fourth latches 551. The upper backing plate 55 is assembled by engaging the fourth latches 551 with the fourth latches 541. A third concave member 542 and a fourth concave member are provided within the second groove 54. The upper backing plate 55 is provided with a third mating ring 552 and a fourth mating ring 553. The third mating ring 552 and the upper ends of the third concave member 542 mate and abut to form one vacant position, while the fourth mating ring 553 and the upper ends of the fourth concave member 543 mate and abut to form the other vacant position. This design facilitates the processing and assembly of the stool panel 5. In the retracted state, the user's hand can enter the empty space after passing through the through opening 64 and then touch the front end surface of the backrest 6, thereby receiving force.

[0079] In addition, since the upper pad 55 is arranged at the center of the upper end surface of the stool panel 5, the setting of the two empty spaces will not affect the user's normal sitting and standing, and can also increase comfort to a certain extent.

[0080] Next, see Figure 8 and Figure 9 It can be seen that in this embodiment, a splicing plate 65 is detachably installed on the rear side of the backrest 6. The splicing plate 65 is provided with an opening 651 corresponding to the through-opening 64. A plurality of ribs 66 are provided inside the backrest 6. This design, while not affecting the structural stability of the backrest 6, can facilitate the injection molding process of the backrest 6 on the one hand, and can reduce the cost of injection molding materials on the other hand.

[0081] See also Figures 14-19 It can be seen that in this embodiment, the load-bearing ring includes a lower load-bearing ring 2 fixed on the base 1, an upper load-bearing ring 4 fixed on the stool panel 5, and several intermediate load-bearing rings 3 arranged between the upper load-bearing ring 4 and the lower load-bearing ring 2. The lifting and lowering locking structure includes a plurality of connecting groove groups arranged at intervals along the circumference of the intermediate load-bearing ring 3 or the lower load-bearing ring 2, and a plurality of sliders fixed to the lower end of the intermediate load-bearing ring 3 or the upper load-bearing ring 4. Each connecting groove group includes a plurality of connecting grooves arranged at intervals from each other. The connecting groove includes a positioning portion 311 and a guide portion 312. The positioning portion 311 is arranged on one side of the upper end of the guide portion 312 and forms a bending structure. The guide portion 312 extends vertically, and the slider slides in the connecting groove. In the use state, the slider is placed in the positioning portion 311 and forms a locking position. In the storage state, the slider disengages from the positioning portion 311 and moves horizontally to the lowermost end of the guide portion 312.

[0082] Working principle of the lifting assembly: When in use, the slider is placed on the positioning portion 311, which is a sunken notch and has an inclined surface at the lower end. After the slider is placed in the positioning portion 311, if the load-bearing ring is directly rotated, the slider cannot be disengaged from the positioning portion 311. When it is necessary to switch to the storage state, the load-bearing ring needs to be pulled up to a certain height and the slider is disengaged from the positioning portion 311. Then, the load-bearing ring is rotated to move the slider to the upper end of the guide portion 312 (since the upper load-bearing ring 4 is fixed to the stool panel 5, by pulling up the stool panel 5, all the load-bearing rings can be translated upward, and by continuously rotating the stool panel 5, all the load-bearing rings can be driven to rotate in sequence from top to bottom). When the slider moves to the upper end of the guide part 312, since the guide part 312 extends vertically, by pressing down the load-bearing ring, the slider of the upper load-bearing ring of the two adjacent load-bearing rings can be slid along the guide part 312 of the lower load-bearing ring until it slides to the lower end of the guide part 312. At this time, the upper load-bearing ring and the lower load-bearing ring are at the same height.

[0083] Next, in order to increase the structural stability of the lifting assembly, in this embodiment, the inner diameters of all the bearing rings increase from top to bottom, that is, the inner diameter of the upper bearing ring 4 is the smallest, and the inner diameter of the lower bearing ring 2 is the largest. When the upper bearing ring among all adjacent bearing rings is lowered to the same height as the lower bearing ring, refer to Figure 14 , you can see that at this time, the upper bearing ring 4 and all the middle bearing rings 3 are lowered to the height of the lower bearing ring 2, that is, all the bearing rings are at the same height and are nested and connected to each other. Figure 3-Figure 5 By snap-fitting and fixing the stool panel 5 and the base 1 to each other (as will be mentioned later), the lifting assembly can be stored between the stool panel 5 and the base 1, taking up very little space.

[0084] For easier understanding, please refer to Figures 15-19 In this embodiment, the slider located in the middle load-bearing ring 3 is the first slider 32, the slider located in the upper load-bearing ring 4 is the second slider 43, the connecting slot located in the lower load-bearing ring 2 is the first connecting slot 21, and the connecting slot located in the middle load-bearing ring 3 is the second connecting slot 31.

[0085] Regarding the connection between the upper load-bearing ring 4 and the middle load-bearing ring 3, there are multiple second sliders 43, and they are fixed at the lower end of the upper load-bearing ring 4 at circumferential intervals along the upper load-bearing ring 4. The second slider 43 includes an integrally formed second internal block 431 and a second external block 432. The second connecting slot 31 includes an internal slot 313 and an external slot 314 that are interconnected. The external slot 314 is located outside the internal slot 313. The second internal block 431 slides in the internal slot 313, and the second external block 432 slides in the external slot 314.

[0086] Regarding the connection between adjacent intermediate load-bearing rings 3, there are multiple first sliders 32, which are fixed at the lower end of the intermediate load-bearing ring 3 at circumferential intervals along the upper intermediate load-bearing ring 3. The first slider 32 includes an integrally formed first internal block 321 and a first external block 322. The first internal block 321 slides in the internal groove 313, and the first external block 322 slides in the external groove 314.

[0087] Regarding the connection between the middle load-bearing ring 3 and the lower load-bearing ring 2, the structures of the first connecting slot 21 and the second connecting slot 31 are consistent, and the first slider 32 is matched and slidably connected in the first connecting slot 21, which will not be described in detail here.

[0088] In the connection structure of the adjacent load-bearing rings mentioned above, by setting the internal slot 313 and the external slot 314, the sliding installation between the second slider 43 and the second connecting slot 31, the sliding installation between the first slider 32 and the second connecting slot 31, and the sliding installation between the first slider 32 and the first connecting slot 21 can all be made very stable.

[0089] Note that in the process of switching to the storage state, regarding the rotation of all the load-bearing rings, after the second slider 43 of the upper load-bearing ring 4 is translated to the upper end of the guide portion 312 of the middle load-bearing ring 3, continue to rotate the upper load-bearing ring 4 (achieved by rotating the stool panel 5), which can drive the middle load-bearing ring 3 to rotate, and make the first slider 32 of the upper middle load-bearing ring 3 translate to the upper end of the guide portion 312 of the lower middle load-bearing ring 3. Similarly, by continuously rotating the stool panel 5, all the sliders can be translated to the upper end of the guide portion 312.

[0090] Then, in this embodiment, the upper end surfaces of the middle load-bearing ring 3 and the lower load-bearing ring 2 are provided with a number of recessed positions spaced apart from each other and recessed downwardly along their own circumferences, and the bottom ends of the recesses are provided with notches. The lower ends of the outer walls of the middle load-bearing ring 3 and the upper load-bearing ring 4 are provided with a plurality of load-bearing wedges. In the use state, of the two adjacent load-bearing rings, the load-bearing wedges on the upper load-bearing ring abut against the top of the bottom end of the recessed position on the lower load-bearing ring. In the process of switching from the use state to the storage state, the load-bearing wedges on the upper load-bearing ring pass through the notch from the top of the bottom end of the recessed position of the lower load-bearing ring to the bottom of the notch.

[0091] For easier understanding, please refer to Figures 15-19As can be seen, in this embodiment, the load-bearing wedge located in the middle load-bearing ring 3 is the first load-bearing wedge 33, the load-bearing wedge located on the upper load-bearing ring 4 is the second load-bearing wedge 44, the recess located on the lower load-bearing ring 2 is the first recess 23, the notch located in the first recess 23 is the first notch 231, the recess located in the middle load-bearing ring 3 is the second recess 34, and the notch located in the second recess 34 is the second notch 341. In use, the first load-bearing wedge 33 abuts against the bottom end of the first recess 23, and the second load-bearing wedge 44 abuts against the bottom end of the second recess 34, thereby effectively increasing the load-bearing capacity of the lifting assembly. When it is necessary to switch to the storage state, by rotating all the load-bearing rings, the first load-bearing wedge 33 can be moved to directly above the first notch 231, and the second load-bearing wedge 44 can be moved to directly above the second notch 341. Then, the stool panel 5 is pressed down, and the first load-bearing wedge 33 enters below the first notch 231 through the first notch 231, and the second load-bearing wedge 44 enters below the second notch 341 through the second notch 341.

[0092] More specifically, the upper load-bearing ring 4 is fixed to the bottom of the stool panel 5 by means of a number of blocks and bayonet connections, and the lower load-bearing ring 2 is fixed to the top of the base 1 by means of a number of blocks and bayonet connections. At least one vertically placed tension spring 8 is provided between the base 1 and the stool panel 5, and a handle ring 7 is provided on the stool panel 5 or the base 1.

[0093] For the connection between the lower bearing ring 2 and the base 1, please refer to Figure 11 、 Figure 16 and Figure 20 It can be seen that in this embodiment, the base 1 is provided with a sleeve groove 11 for the lower bearing ring 2 to be snapped into, and the bottom edge of the sleeve groove 11 is provided with a plurality of first bayonet holes 12 spaced apart from each other, and the lower end edge of the lower bearing ring 2 is provided with a plurality of second clamping blocks 22 spaced apart from each other. By snapping the second clamping blocks 22 and the first bayonet holes 12 together, the lower bearing ring 2 can be fixed on the base 1.

[0094] In addition, in this embodiment, a plurality of sealing plates 15 are detachably mounted on the upper end surface of the base 1 . The sealing plates 15 are arranged to cooperate with each other to form the sleeve grooves 11 .

[0095] For the connection between the bench panel 5 and the upper bearing ring 4, please refer to Figure 10 and Figure 15It can be seen that in this embodiment, a connecting ring 53 is provided at the lower end of the stool panel 5, and a plurality of third bayonet holes 531 are provided on the connecting ring 53 along its own circumference, and a plurality of abutment blocks 532 are also provided on the outer wall of the connecting ring 53. A plurality of flanges 41 are provided at the upper end of the upper load-bearing circle 4, and a third clamping block 42 is fixed to the inner side of the flange 41. By clamping the third clamping block 42 and the third bayonet hole 531, the upper load-bearing circle 4 can be fixed on the stool panel 5. At this time, the upper end of the upper load-bearing circle 4 abuts on the abutment block 532.

[0096] Also, see Figure 5 、 Figure 12 and Figure 13 It can be seen that in this embodiment, a boss 13 is provided at the bottom of the sleeve groove 11 of the base 1, and a plurality of second bayonet holes 131 are provided at the edge of the boss 13. A first groove 133 corresponding to the boss 13 is provided at the lower end of the base 1, and a first concave part 134 and a second concave part 135 are provided at the bottom of the first groove 133. A first pad is installed at the notch of the first groove 133, and a plurality of first clamping blocks 141 corresponding to the second bayonet holes 131 are provided at the edge of the first pad, and a first mating ring 143 and a second mating ring 144 are provided on the first pad. The first mating ring 143 and the lower end of the first concave part 134 match and abut to form one of the empty spaces, and the lower ends of the second mating ring 144 and the second concave part 135 match and abut to form another empty space.

[0097] In this embodiment, two first inverted fasteners 142 are provided at the upper end of the first pad, and two clearance openings 132 are provided at the bottom of the first groove 133. After passing through the clearance openings 132, the first inverted fasteners 142 extend above the clearance openings 132. Then, two second inverted fasteners 58 are provided at the lower end of the stool panel 5. In the stowed state, the first inverted fasteners 142 and the second inverted fasteners 58 are invertedly engaged (the first inverted fasteners 142 and the second inverted fasteners 58 can be slightly deformed during the downward pressing of the stool panel 5 to achieve mutual inverted engagement), thereby connecting the stool panel 5 to the base 1 and preventing the stool panel 5 from separating from the base 1. When the stool panel 5 needs to be switched to the use state, the first inverted fasteners 142 and the second inverted fasteners 58 are misaligned because the stool panel 5 needs to be rotated. This will not affect the subsequent opening of the stool panel 5.

[0098] See also Figure 3 and Figure 4 In this embodiment, a handle ring 7 is provided at the rear end of the stool panel 5. In the storage state, the user can lift the foldable stool by the handle ring 7 for easy taking.

[0099] Also, see Figure 20In this embodiment, the bottom of the socket groove 11 of the base 1 and the bottom of the stool panel 5 are provided with a plurality of fixing blocks 16 for cooperating with the installation of the tension spring 8. The tension spring 8 is arranged vertically. The plurality of tension springs 8 work together to assist the user in completing the folding and storage of all the load-bearing rings more easily.

[0100] It should be noted that in conventional folding stools, the base 1 is primarily circular in outline. However, in actual use, this structural design can easily cause the stool to tip over when the stool is subjected to lateral force, resulting in poor placement stability. Therefore, in this embodiment, the base 1 is designed with a square outline (in the stowed state, to facilitate the connection between the base 1 and the stool panel 5, the stool panel 5 is also designed with a square outline in this embodiment). This increases the overall stability of the stool and prevents it from toppling over due to lateral force.

[0101] The above description of a foldable height-raising stool with a backrest of the present invention is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the practical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A foldable height-enhancing stool with a backrest, characterized in that: include: base; The lifting assembly is installed above the base and includes a plurality of load-bearing rings that are nested and assembled from the outside to the inside, and a lifting locking structure is provided between adjacent load-bearing rings; The stool panel is installed above the lifting assembly; A backrest is rotatably mounted on the rear end of the bench panel and has a storage state in which it abuts against the upper portion of the bench panel, and a use state in which it is rotated upward away from the bench panel. In the use state, a positioning structure for cooperating and fixing the position of the backrest is provided between the backrest and the bench panel; The lifting locking structure has a locking position and an unlocking position, and is switched by the same-direction circumferential rotation of all the load-bearing rings. In the use state, the adjacent load-bearing rings are pulled apart from each other to the farthest ends, and the lifting locking structure is in the locking position, fixing the relative positions of all the load-bearing rings; in the storage state, the lifting locking structure is switched to the unlocking position, and all the load-bearing rings are lowered to the height of the lowest load-bearing ring. The stool panel and the base cooperate to cover the lifting assembly.

2. A foldable height-enhancing stool with a backrest according to claim 1, characterized in that: The rear end of the stool panel is provided with at least one rotation position, and one end of the backrest is provided with at least one rotating member for cooperating with and rotating with the rotation position.

3. A foldable height-enhancing stool with a backrest according to claim 2, characterized in that: The positioning structure is at least one stop bar and at least one clamping bar fixed to the rear end of the upper end surface of the stool panel, the stop bar is located in front of the clamping bar, and the height of the stop bar is greater than the height of the clamping bar. An extension piece is provided at one end of the backrest close to the rotating part. When in use, the lower end of the extension piece is clamped between the stop bar and the clamping bar.

4. A foldable height-enhancing stool with a backrest according to claim 3, characterized in that: The rotating position includes several adapter plates upright and fixed above the rear end of the stool panel. The rotating member is provided with several partitions arranged at intervals from each other, and several notches for the adapter plates to extend into. The adapter plates are arranged between adjacent partitions. The rotating member is provided with an axle rod, which passes through all the partitions and all the adapter plates at the same time. In use, the rear end of the adapter plate abuts against the rear inner wall of the rotating member, and together with the stop strip and the card strip, forms the positioning structure.

5. The foldable height-enhancing stool with a backrest according to claim 4, characterized in that: At least one positioning block is provided on the upper end surface of the stool panel, and at least one positioning groove is provided on the front end surface of the backrest. In the storage state, the positioning block is matched and clamped in the positioning groove.

6. A foldable height-enhancing stool with a backrest according to any one of claims 1 to 5, characterized in that: The upper end surface of the stool panel extends in a wave shape and has a wave crest and two wave troughs. The two wave troughs are respectively located on the left and right sides of the wave crest, and the height of the wave crest is greater than the height of the wave trough.

7. The foldable height-enhancing stool with a backrest according to claim 6, characterized in that: At least one downwardly recessed space is provided on the upper end surface of the stool panel, and a through opening is provided on the backrest. In the storage state, the through opening corresponds to the at least one empty space and cooperates to form a gripping position for a person to grasp.

8. A foldable height-enhancing stool with a backrest according to any one of claims 1 or 7, characterized in that: The load-bearing ring includes a lower load-bearing ring fixed on the base, an upper load-bearing ring fixed on the stool panel, and several intermediate load-bearing rings arranged between the upper load-bearing ring and the lower load-bearing ring. The lifting and locking structure includes a plurality of connecting groove groups arranged at intervals along the circumference of the intermediate load-bearing ring or the lower load-bearing ring, and a plurality of sliders fixed at the lower end of the intermediate load-bearing ring or the upper load-bearing ring. Each connecting groove group includes a plurality of connecting grooves arranged at intervals from each other. The connecting groove includes a positioning part and a guide part. The positioning part is arranged on one side of the upper end of the guide part and forms a bending structure. The guide part extends vertically. The slider is slid into the connecting groove. In the use state, the slider is placed in the positioning part and forms a locking position. In the storage state, the slider is disengaged from the positioning part and moves horizontally to the lowermost end of the guide part.

9. The foldable height-enhancing stool with a backrest according to claim 8, characterized in that: The upper end surfaces of the middle load-bearing ring and the lower load-bearing ring are provided with a number of recessed positions spaced from each other and recessed downwardly along their circumferences, and the bottom ends of the recesses are provided with notches. The lower ends of the outer walls of the middle load-bearing ring and the upper load-bearing ring are provided with a plurality of load-bearing wedges. In the use state, of the two adjacent load-bearing rings, the load-bearing wedges on the upper load-bearing ring abut against the bottom ends of the recesses on the lower load-bearing ring. In the process of switching from the use state to the storage state, the load-bearing wedges on the upper load-bearing ring pass through the notches from above the bottom ends of the recesses of the lower load-bearing ring to below the notches.

10. The foldable height-enhancing stool with a backrest according to claim 9, characterized in that: The upper load-bearing ring is fixed below the stool panel by means of a plurality of clamping blocks and bayonet sockets, and the lower load-bearing ring is fixed above the base by means of a plurality of clamping blocks and bayonet sockets. At least one vertically placed tension spring is provided between the base and the stool panel, and a handle ring is provided on the stool panel or the base.

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