Folding stool with safety lock

Abstract

The utility model provides a folding stool with a safety lock, which comprises a stool surface, a base and a plurality of bearing rings which are positioned between the stool surface and the base and can slide relatively, and further comprises a locking mechanism mounted on the stool surface, and the locking mechanism comprises a rotatable wire coil and a cable wound outside the wire coil, one end of the cable extends downwards and is connected with the base; the movable locking seat is connected with the wire coil in a locking manner; when the wire coil rotates to a specified position, the cable is in a straightened state, and the locking seat locks the wire coil, so that the stool surface, the base and the bearing ring are stably connected; the stool is ingenious and reasonable in design structure, when the stool is adjusted to any height position, a cable can be straightened by rotating the wire coil, so that the sliding blocks on the two adjacent bearing rings can be locked in the second sliding grooves, the problem that the sliding blocks are separated from the second sliding grooves when the stool is moved is avoided, and the stool is convenient to use. The purpose of stably locking the stool is achieved, and a user is prevented from falling down.

Description

Technical Field

[0001] This utility model relates to the field of folding stool design technology, and in particular to a folding stool with a safety lock. Background Technology

[0002] Portable stools are essential items for travelers, and with the increase in travel activities, the types and functions of stools have also diversified. For example, Chinese utility model patent application number CN201921729847.8 discloses a multifunctional safety telescopic stool, including a stool surface and a stool body. The stool body includes a base and a support part connected to the stool surface. The support part includes several cylindrical bodies that are nested together from top to bottom. Several sets of locking mechanisms are evenly distributed around the outer periphery of the cylindrical bodies. Each locking mechanism includes a strip-shaped groove on the outer side of the first cylindrical body and a protrusion on the outer side of the second cylindrical body. The protrusion slides within the strip-shaped groove to achieve arbitrary movement between any two adjacent protrusions. The cylindrical bodies are adjustable for telescopic movement. The strip-shaped sliding groove is provided with a slot and a protrusion for limiting engagement, forming a telescopic fit structure. The stool surface and the interior of the stool body form a receiving cavity. The stool surface is provided with a mounting hole that communicates with the receiving cavity. Items are placed into the receiving cavity through the mounting hole for storage. A pressure-screw cap is placed on the mounting hole, with the edge of the pressure-screw cap fitting snugly against the mounting hole. The side wall of the pressure-screw cap is provided with an arc-shaped groove. The wall of the mounting hole is provided with a locking block that slides and engages with the arc-shaped groove, realizing the rotational locking of the pressure-screw cap and the mounting hole.

[0003] Although the aforementioned telescopic stool can achieve the effect of telescopic adjustment, it cannot achieve a stable locking effect at any height during use, which may cause users to fall when they sit on it. Utility Model Content

[0004] This utility model proposes a folding stool with a safety lock to solve the problem mentioned in the background art that existing folding stools cannot lock at any height, which makes it easy for users to fall.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A folding stool with a safety lock includes a stool surface, a base, and a plurality of relatively slidable load-bearing rings located between the stool surface and the base. It also includes a locking mechanism mounted on the stool surface, the locking mechanism comprising:

[0007] A rotatable spool, with a cable wound around its exterior, one end of which extends downward and is connected to a base;

[0008] A movable locking seat, which is locked to the reel;

[0009] When the reel rotates to the designated position, the cable is taut, and the locking seat locks the reel, ensuring a secure connection between the stool surface, base, and load-bearing ring. This prevents relative movement between adjacent load-bearing rings and avoids deformation of the folding stool that could cause people to fall.

[0010] Preferably, the spool has teeth in the circumferential direction, and the locking seat has locking teeth that mesh with the teeth.

[0011] Preferably, the locking mechanism further includes a mounting bracket and a coil spring. The coil is rotatably mounted in the mounting bracket, the central fixed end of the coil spring is connected to the mounting bracket, and the external movable end is connected to the coil.

[0012] Preferably, the locking mechanism further includes a housing and a cover plate mounted on the stool surface. The housing is mounted below the cover plate, and a cavity is formed between the housing and the cover plate. The locking seat is located in the cavity and slides with the housing.

[0013] Preferably, a second elastic element is provided in the cavity formed by the outer shell and the cover plate. The second elastic element is configured to move the locking seat toward the coil when the locking seat is not subjected to external force.

[0014] Preferably, it also includes a locking hook, one end of which is connected to the outer shell and the other end is disposed in an annular slide rail opened on the locking seat along a specified sliding direction;

[0015] The annular slide on the locking seat includes a first slide, a second slide, a third slide, and a fourth slide connected in sequence. The first slide and the fourth slide are connected, and an island is formed in the middle of the annular slide. The island is provided with a positioning arc surface in the direction close to the coil.

[0016] Preferably, the locking seat is provided with an upwardly protruding mounting post, and an indicator block is sleeved on the mounting post;

[0017] The cover plate has a first window and a second window, the mounting post extends into the first window and can slide within the first window; some teeth on the coil extend into the second window.

[0018] Preferably, the load-bearing ring has a circular structure, and the diameter of several load-bearing rings decreases sequentially from bottom to top. Adjacent load-bearing rings are nested together. In the two adjacent load-bearing rings, the outer wall of the upper load-bearing ring is provided with multiple outwardly protruding sliders. The lower load-bearing ring has axially extending first grooves evenly distributed along its circumference. The top of the first groove is connected to a second groove, and the end of the second groove is recessed downward. The slider can slide in the first groove and enter the second groove after moving to the top of the first groove. The slider can move to the recessed position of the second groove under the weight of the load-bearing ring itself, thereby achieving the positioning effect of the upper and lower load-bearing rings.

[0019] Preferably, among all the load-bearing rings, the uppermost load-bearing ring is connected to the seat surface, and the lowermost load-bearing ring is connected to the base.

[0020] Preferably, it also includes a first elastic element, the two ends of which are connected to the stool surface and the base, respectively.

[0021] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0022] This utility model has a clever and reasonable design structure. When the stool is adjusted to any height, the cable can be straightened by rotating the cable reel, so that the sliders on the two adjacent load-bearing rings can be locked in the second groove. This prevents the sliders from falling out of the second groove when the stool is moved, thereby achieving the purpose of stabilizing and locking the stool and preventing the user from falling. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a perspective view of the present utility model;

[0025] Figure 2 This is an exploded view of the present invention;

[0026] Figure 3 This is a perspective view of the locking mechanism of this utility model;

[0027] Figure 4 This is an exploded view of the locking mechanism of this utility model;

[0028] Figure 5 This is a perspective view of the locking mechanism of this utility model with the cover plate concealed.

[0029] Figure 6 This is a top view of the locking mechanism of this utility model with the cover plate and indicator block hidden.

[0030] Figure 7 This is a cross-sectional view of the locking mechanism of this utility model;

[0031] Figure 8 The three-dimensional locking seat of this utility model Figure 1 ;

[0032] Figure 9 The three-dimensional locking seat of this utility model Figure 2 ;

[0033] Figure 10 This is a top view of the locking seat of this utility model;

[0034] Figure 11 This utility model Figure 10 A magnified view of a portion of the view;

[0035] Figure 12 An exploded view showing the connection of the first bracket, wire reel, coil spring, and cable of this utility model.

[0036] Figure 13 This is a structural diagram of the load-bearing ring of this utility model.

[0037] in:

[0038] 1. Stool surface;

[0039] 2. Locking mechanism; 201. Cover plate; 2011. First window; 2012. Second window; 202. First bracket; 2021. Mounting shaft; 2022. Slot; 203. Cable reel; 2031. Tooth; 204. Coil spring; 205. Cable; 206. Second bracket; 207. Indicator block; 208. Second elastic element; 209. Locking seat; 2091. Hook; 2092. Mounting post; 2093. Locking tooth; 2094. Guide groove; 2095. First slide rail; 2096. Positioning arc surface; 2097. Second slide rail; 2098. Third slide rail; 2099. Island platform; 20910. Fourth slide rail; 210. Locking hook; 211. Outer shell; 2111. Guide protrusion;

[0040] 3. First elastic element;

[0041] 4. Base;

[0042] 5. Load-bearing ring; 501. Slider; 502. First slide groove; 503. Second slide groove. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0044] like Figure 1-13 As shown, a folding stool with a safety lock includes a stool surface 1, a base 4, and several load-bearing rings 5 ​​that can slide relative to each other between the stool surface 1 and the base 4. In this example, the load-bearing rings 5 ​​are circular structures, and the diameter of the load-bearing rings 5 ​​decreases from bottom to top. Adjacent load-bearing rings 5 ​​are nested together. When in use, adjacent load-bearing rings 5 ​​can move relative to each other along the axial direction, thereby realizing the function of unfolding or storing the folding stool.

[0045] More specifically, in the two adjacent upper and lower support rings 5, the outer wall of the upper support ring 5 is provided with multiple outwardly protruding sliders 501, and the lower support ring 5 has axially extending first grooves 502 evenly distributed along its circumference. The top of the first groove 502 is connected to a second groove 503, and the end of the second groove 503 is recessed downward. The sliders 501 can slide within the first groove 502, and after the sliders 501 move to the top position of the first groove 502, they enter the second groove 503. Under the weight of the support ring 5 itself, the sliders 501 can move to the recessed position of the second groove 503, realizing the vertical movement of the upper and lower support rings. The positioning effect of the two load-bearing rings 5 ​​is achieved by utilizing the interconnected first slide groove 502 and second slide groove 503 as a single slide groove structure, along with a slider 501 that slides within the grooves. This allows multiple load-bearing rings 5 ​​to move in a specified direction. When fully extended, adjacent load-bearing rings 5 ​​rotate relative to each other along their central axis, causing the slider 501 to enter the second slide groove 503, thus achieving the positioning effect of the two load-bearing rings 5. When the two adjacent load-bearing rings 5 ​​move axially in the extended direction again, the slider 501 can disengage from the second slide groove 503, and the user can then rotate one of the load-bearing rings 5 ​​for storage. However, this structure has a problem with accidental operation in actual use, which could easily cause the user to fall while sitting on the stool. The main reason is that when a user needs to move a stool, they usually hold the stool surface 1 and move the stool. However, during this process, relative movement can occur between the two adjacent load-bearing rings 5 ​​in the axial direction. This movement is in the direction of release from positioning, which can easily cause the slider 501 to enter the first groove 502 and cause the stool to fall.

[0046] Therefore, to solve this problem, this embodiment, based on the above structure, also includes a locking mechanism 2 installed on the stool surface 1, the locking mechanism 2 comprising:

[0047] A rotatable spool 203, wherein the spool 203 is provided with teeth 2031 in the circumferential direction, wherein the teeth 2031 are helical teeth;

[0048] Cable 205 is wound around the outside of coil 203, with one end extending downward and connected to base 4;

[0049] The movable locking seat 209 is provided with locking teeth 2093 that can engage with teeth 2031 on the coil 203. Locking teeth 2093 are also helical teeth. When the coil 203 rotates in one direction, teeth 2031 can contact locking teeth 2093, but locking teeth 2093 will not lock teeth 2031. When the limit rotates in the opposite direction, locking teeth 2093 can engage with helical teeth, thereby achieving a locking effect.

[0050] When the reel 203 rotates to the designated position, the cable 205 is taut. The locking teeth 2093 on the locking seat 209 lock the reel 203, preventing relative movement between adjacent load-bearing rings 5. This ensures a stable connection between the stool surface 1, base 4, and load-bearing rings 5, preventing deformation of the folding stool and potential falls. Specifically, with the cable 205 taut, adjacent load-bearing rings 5 ​​are under the force of the cable 205 in the folding direction. This ensures that the slider 501 remains within the recessed area of ​​the second groove 503, preventing it from dislodging even when the stool is moved. This provides a good locking effect.

[0051] Specifically, the locking mechanism 2 further includes:

[0052] The mounting bracket is rotatably mounted inside the mounting bracket. In this example, the mounting bracket includes a first bracket 202 and a second bracket 206. The first bracket 202 and the second bracket 206 are connected by screws, which facilitates the assembly of internal components.

[0053] The coil spring 204 has its fixed end connected to the mounting bracket and its movable end connected to the coil 203. The coil spring 204 is mainly used to ensure that the coil 203 always rotates in a specified direction without external force. In this example, this direction is the direction that makes the cable 205 go from taut to slack. The purpose is that the cable 205 can only be taut by rotating the coil.

[0054] The coil 203 is fitted inside the first bracket 202 at the mounting shaft 2021. A slot 2022 is provided at the end of the mounting shaft 2021, and the center fixed end of the coil spring 204 is locked in the slot 2022.

[0055] Specifically, the locking mechanism 2 further includes:

[0056] Cover plate 201 is installed on seat surface 1;

[0057] The outer shell 211 is installed below the cover plate 201, and a cavity is formed between the outer shell 211 and the cover plate 201. The locking seat 209 is located in the cavity and slides with the outer shell 211. More specifically, the bottom sides of the outer shell 211 have protruding guide strips 2111. The lower surface of the locking seat 209 is provided with a guide groove 2094 that matches the guide strips 2111. The guide strips 2111 are slidably disposed in the guide groove 2094 so that the locking seat 209 only has the freedom to move back and forth along the length direction of the guide strips 2111.

[0058] Specifically, a second elastic element 208 is provided in the cavity formed by the outer shell 211 and the cover plate 201. The second elastic element 208 is configured to move the locking seat 209 toward the coil 203 when the locking seat 209 is not subjected to external force. The second elastic element 208 is a spring. In this example, there are two second elastic elements 208. One end of the two second elastic elements 208 is hooked to the hook 2091 on both sides of the surface of the locking seat 209, and the other end is connected by a wire or rope. The wire or rope passes around the mounting bracket so that, in the natural state, the second elastic element 208 can apply a force to the locking seat 209 to move toward the coil 203.

[0059] Specifically, it also includes a locking hook 210, one end of which is connected to the outer shell 211, and the other end is set in the annular slide rail opened on the locking seat 209 along a specified sliding direction.

[0060] The annular slide on the locking seat 209 includes a first slide 2095, a second slide 2097, a third slide 2098 and a fourth slide 20910 connected in sequence. The first slide 2095 and the fourth slide 20910 are connected, and an island platform 2099 is formed in the middle of the annular slide. The island platform 2099 is provided with a positioning arc surface 2096 in the direction close to the coil 203.

[0061] More specifically, such as Figure 11As shown, the locking hook 210 moves counterclockwise within the annular slide and can only move in a counterclockwise direction. Here, we will use the counterclockwise direction of the annular slide as an example: On the first slide 2095, its initial plane is lower than its end plane, that is, the first slide 2095 has a slope; the plane of the second slide 2097 is lower than the end plane of the first slide 2095; the plane of the third slide 2098 is lower than the plane of the second slide groove 503; and the initial end plane of the fourth slide 20910 is lower than the plane of the third slide 2098.

[0062] In practical operation, the locking hook 210 is as follows: Figure 11 The indicated position serves as the starting point (where the locking hook 210 is in the locked state of the folding stool). When the locking seat 209 moves towards the locking hook 210, the locking hook 210 begins to move counterclockwise along the annular slide, first entering the second slide 2097 and contacting the root of the second slide 2097. At this point, the user releases their grip, and under the elastic force of the second elastic element 208, the locking hook 210 contacts the positioning arc surface 2096 on the island platform 2099. At this time, the folding stool is in the unlocked state. The locking teeth 2093 on the locking seat 209 disengage from the teeth 2031 on the coil 203. The coil 203 rotates under the action of the coil spring 204, causing the cable 205, which was originally in a taut state, to become slack, so that the folding stool can be stored. When the locking seat 209 is pushed again, the locking hook 210 will enter the fourth slide 20910 from the third slide 2098. Under the elastic force of the second elastic element 208, it will return to the initial starting position and complete the working cycle.

[0063] Specifically, the locking seat 209 is provided with an upwardly protruding mounting post 2092, and an indicator block 207 is sleeved on the mounting post 2092;

[0064] The cover plate 201 has a first window 2011 and a second window 2012. The mounting post 2092 extends into the first window 2011 and can slide within the first window 2011. Some teeth 2031 on the coil 203 extend into the second window 2012.

[0065] The surface of the indicator block 207, the surface of the cover plate 201 next to the first window 2011, and the surface of the cover plate 201 next to the second window 2012 are all provided with indicator marks to facilitate the user to view the operation instructions. For example, by moving the mounting post 2092 to the designated mark (locked and unlocked states), the corresponding locking and unlocking operations can be completed. By moving the teeth 2031 on the cable reel 203, the cable reel 203 can be rotated, thereby straightening the cable 205.

[0066] Specifically, of all the load-bearing rings 5, the uppermost load-bearing ring 5 is connected to the seat surface 1, and the lowermost load-bearing ring 5 is connected to the base 4.

[0067] Specifically, it also includes a first elastic element 3, whose two ends are connected to the stool surface 1 and the base 4, respectively. In this example, the first elastic element 3 is also a spring, and there are two of them. The two first elastic elements 3 are evenly distributed around the center of the folding stool. More than two first elastic elements 3 can also be used, which is not limited here. The purpose of the first elastic element 3 is to ensure that there is always a force between the stool surface 1 and the base 4 to keep them close to each other, in conjunction with the cable 205 to prevent the folding stool from tipping over during use.

[0068] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A folding stool with a safety lock, comprising a stool surface (1), a base (4), and a plurality of relatively sliding load-bearing rings (5) located between the stool surface (1) and the base (4), characterized in that, It also includes a locking mechanism (2) installed on the seat surface (1), the locking mechanism (2) comprising: A rotatable spool (203), a cable (205) wound around the outside of the spool (203), one end of the cable (205) extending downward and connected to the base (4); A movable locking seat (209) is locked to the coil (203); When the reel (203) rotates to the designated position, the cable (205) is in a taut state, and the locking seat (209) locks the reel (203), so that the seat (1), the base (4) and the load-bearing ring (5) are firmly connected.

2. A folding stool with a safety lock according to claim 1, characterized in that, The spool (203) has teeth (2031) in the circumferential direction, and the locking seat (209) has locking teeth (2093) that mesh with the teeth (2031).

3. A folding stool with a safety lock according to claim 1 or 2, characterized in that, The locking mechanism (2) also includes a mounting bracket and a coil spring (204). The coil (203) is rotatably mounted in the mounting bracket. The central fixed end of the coil spring (204) is connected to the mounting bracket, and the external movable end is connected to the coil (203).

4. A folding stool with a safety lock according to claim 1 or 2, characterized in that, The locking mechanism (2) also includes a housing (211) and a cover plate mounted on the seat (1). The housing (211) is mounted below the cover plate (201), and a cavity is formed between the housing (211) and the cover plate (201). The locking seat (209) is located in the cavity and slides with the housing (211).

5. A folding stool with a safety lock according to claim 4, characterized in that, The cavity formed by the outer shell (211) and the cover plate (201) is provided with a second elastic element (208), which is configured to move the locking seat (209) toward the coil (203) when the locking seat (209) is not subjected to external force.

6. A folding stool with a safety lock according to claim 4, characterized in that, It also includes a locking hook (210), one end of which is connected to the outer shell (211), and the other end is set in the annular slide rail opened on the locking seat (209) along the specified sliding direction; The annular slide on the locking seat (209) includes a first slide (2095), a second slide (2097), a third slide (2098) and a fourth slide (20910) connected in sequence. The first slide (2095) and the fourth slide (20910) are connected, and an island platform (2099) is formed in the middle of the annular slide. The island platform (2099) is provided with a positioning arc surface (2096) in the direction close to the coil (203).

7. A folding stool with a safety lock according to claim 4, characterized in that, The locking seat (209) is provided with an upwardly protruding mounting post (2092), and an indicator block (207) is sleeved on the mounting post (2092). The cover plate (201) has a first window (2011) and a second window (2012). The mounting post (2092) extends into the first window (2011) and can slide within the first window (2011). Some teeth (2031) on the coil (203) extend into the second window (2012).

8. A folding stool with a safety lock according to claim 1 or 2, characterized in that, The load-bearing ring (5) is a circular structure. The diameter of several load-bearing rings (5) decreases from bottom to top. Two adjacent load-bearing rings (5) are nested together. In the two adjacent load-bearing rings (5), multiple outwardly protruding sliders (501) are provided on the outer wall of the upper load-bearing ring (5). The lower load-bearing ring (5) has a first groove (502) that extends axially and is evenly distributed in the circumferential direction. The top of the first groove (502) is connected to a second groove (503). The end of the second groove (503) is recessed downward. The slider (501) can slide in the first groove (502) and enter the second groove (503) after the slider (501) moves to the top of the first groove (502). The slider (501) can move to the recessed position of the second groove (503) under the action of the weight of the load-bearing ring (5), thereby achieving the positioning effect of the upper and lower load-bearing rings (5).

9. A folding stool with a safety lock according to claim 8, characterized in that, Of all the load-bearing rings (5), the uppermost load-bearing ring (5) is connected to the seat (1), and the lowermost load-bearing ring (5) is connected to the base (4).

10. A folding stool with a safety lock according to claim 1, characterized in that, It also includes a first elastic element (3), the two ends of which are connected to the seat surface (1) and the base (4) respectively.

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