Supporting rod device for camp bed and camp bed

Abstract

The utility model relates to a camp bed support rod device and camp bed, the support rod device comprises a support rod assembly, the support rod assembly comprises a first support rod and a second support rod, the first end of the first support rod and the first end of the second support rod are sleeved together and can move along the length direction of the first support rod; a first limiting check block capable of moving in the length direction of the first supporting rod is arranged at the position, close to the first end of the first supporting rod, of the first supporting rod, a second limiting check block is arranged at the first end of the second supporting rod, a locking wrench capable of being unfolded and folded is rotationally connected to the first limiting check block, and the locking wrench is rotationally connected with the first supporting rod through a connecting rod. When the locking wrench is in the folded state, the connecting rod is also folded relative to the first supporting rod, and the locking wrench pushes the first limiting check block to move along the first supporting rod to abut against the second limiting check block. The bed has the advantages that the bed cloth can be tensioned in a more labor-saving manner in the unfolding process of the supporting rod assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of camp beds, in particular to a support rod device for a camp bed and the camp bed. Background Art

[0002] Camp beds are typically made of a wooden or metal frame bound with canvas or other materials. They fold into a compact size for easy portability. They are particularly suitable for activities such as camping, fishing, and outdoor adventures. In the civilian sector, camp beds are also widely used for hospital care and office lunch breaks.

[0003] For example, Chinese utility model patent application number CN202221604387.8 discloses a foldable, compact camp bed comprising parallel, spaced-apart first and second side bars connected by a plurality of foldable bottom support assemblies spaced along a straight line. Each bottom support assembly is removably connected to the first side bar at one end and to the second side bar at the other end. The bottom support assembly comprises a first and second hingedly connected support leg, each comprising an arc-shaped strut, with a strut lock installed at the hinged joint of the arc-shaped struts. The strut lock comprises a lock seat extending over the arc-shaped struts. The middle portion of the lock seat is hingedly connected to the two arc-shaped struts via a rotating shaft. One side of the lock seat is removably connected to one arc-shaped strut via a locking structure, such as an elastic locking plate, and the other side of the lock seat is removably connected to the other arc-shaped strut via a latch.

[0004] The camp bed in the aforementioned patent application has certain drawbacks in actual use: First, when the first and second support legs of the camp bed are rotated and opened, especially when nearly fully opened, the user needs to exert considerable force to fully extend the two support legs and tighten the bed sheet. Otherwise, the bed sheet will become loose and uncomfortable. Second, the first and second support legs of the bottom support assembly of the camp bed are hinged together, making the bed width adjustable, which reduces the user experience.

[0005] Therefore, the existing camp bed support rod device and the camp bed also need further improvement. Utility Model Content

[0006] The first technical problem to be solved by the present invention is to provide a support rod device for a camp bed that can more labor-savingly tension the bed cloth during the unfolding process in response to the current status of the existing technology.

[0007] The second technical problem to be solved by the present invention is to provide a support rod device for a camp bed with adjustable length in view of the current status of the existing technology.

[0008] The third technical problem to be solved by the present invention is to provide a camp bed that can tighten the bed cloth more labor-savingly during the unfolding process in response to the current status of the existing technology.

[0009] The foldable device of claim 1, wherein the first and second ends of the second support rods are connected to each other to form a foldable structure, wherein the foldable device is a first device and a second device is connected to the foldable device.

[0010] Generally speaking, the sliding cooperation structure between the first limit stop and the first support rod can be a guide groove extending along the length direction of the first support rod on the first support rod, and the first limit stop is slidably limited in the guide groove, or the first limit stop is directly used as a sliding sleeve structure sleeved outside the first support rod. Preferably, in order to simplify the sliding cooperation structure between the first limit stop and the first support rod and ensure that the sliding process of the first limit stop (driven by the locking wrench) along the first support rod is smoother and avoids the jamming problem, the first end of the second support rod has a socket for inserting the first end of the first support rod, the first limit stop is a sliding sleeve sleeve sleeved outside the first support rod, and the second limit stop is a fixed sleeve sleeved outside the first end of the second support rod and fixed relative to the second support rod. It can be imagined that the second support rod is inserted into the first support rod, that is, the first support rod is sleeved outside the second support rod, and a sliding groove extending along the length direction is opened on the first support rod, and a part of the sliding sleeve passes through the sliding groove and extends into the first support rod and can be against the end of the second support rod.

[0011] In order to reduce the friction between the first limit block and the first support rod and make the sliding process of the first limit block relative to the first support rod smoother, at least two guide ribs are distributed circumferentially on the inner wall of the first limit block, both of which protrude outward and extend along the length direction of the first support rod.

[0012] In order to be able to securely maintain the locking wrench in a folded state relative to the first support rod, a fixing seat is provided on the first support rod on the side of the first limit block away from the second support rod. When the locking wrench is in the folded state, the locking wrench and the fixing seat are locked by a locking assembly.

[0013] In order to simplify the structure of the lock assembly, the locking wrench is provided with a first receiving groove on the side facing the fixing seat, into which the side portion of the fixing seat can be received. The locking assembly includes a first pressing button and a first elastic protrusion. The first elastic protrusion is provided on the fixing seat and can be elastically retracted. The inner wall of the first receiving groove of the locking wrench is provided with a first clamping groove into which the first elastic protrusion can be clamped. The first pressing button is provided on the outer wall of the locking wrench and corresponds to the first clamping groove. The first pressing button includes a pressing button body and a push rod connected to the pressing button body and movably limited in the first clamping groove. The above structural design makes the first pressing button exposed on the outside of the locking wrench, which makes it convenient for the user to directly press the outside of the locking wrench to unlock, thereby improving the unlocking efficiency of the locking assembly.

[0014] Taking into account that the first elastic buckle of the integrated spring structure is usually made of metal (such as stainless steel, copper, iron, aluminum, etc.) or plastic, long-term pressure or frequent deformation will cause material fatigue, which will gradually weaken the elasticity of the spring, and in severe cases, it will become stuck and cannot be effectively reset, making the locking between the locking wrench and the fixing seat invalid. For this reason, the locking wrench is provided with a first receiving groove on the side facing the fixing seat, which can be received by the side of the fixing seat. The lock assembly includes a first pressing button, a first elastic member and a first elastic buckle. The inner wall of the first receiving groove of the locking wrench is provided with a groove for receiving the first elastic member. A first elastic protrusion snaps into a first slot therein. The first push button is disposed on the outer wall of the locking wrench and corresponds to the first slot. The first push button includes a push button body and a push rod connected to the push button body and movably retained in the first slot. The interior of the fixing base defines a receiving chamber. Two opposing side walls of the fixing base each have a first through hole extending into the receiving chamber. Two first elastic protrusions are movably retained in the two first through holes. A first elastic member is disposed between the two first elastic protrusions, causing the two first elastic protrusions to move away from each other. The first elastic member can be constructed using various existing technologies and may include various elastic elements such as compression springs, torsion springs, and leaf springs. However, to better cooperate with the first elastic protrusions, the first elastic member preferably utilizes a compression spring structure. It is conceivable that the first elastic member can be omitted, and the two first elastic protrusions can be designed as an integrated spring structure, which inherently has a certain degree of deformation elastic reset capability.

[0015] As another feasible solution, the locking wrench is provided with a first receiving groove on the side facing the fixing base, in which the side portion of the fixing base can be received. The locking assembly includes a third limit stop and a limit rib. The third limit stop is provided with two parts, and the two third limit stops protrude from the two opposite side walls of the first receiving groove in a direction approaching each other. The limit rib is provided with two parts, and the two limit ribs protrude outward from the two opposite side walls of the fixing base and can form a limiting fit with the two third limit stops. The third limit stop and limit rib of the locking assembly can be directly formed on the corresponding fixing base or locking wrench, reducing the number of parts, simplifying the assembly process of the locking assembly, and reducing production costs.

[0016] A feasible technical solution adopted by the present invention to solve the second technical problem is as follows: the second end of the connecting rod has a first pin, and the locking wrench is provided with a first receiving groove on the side facing the fixing seat, in which the side of the fixing seat can be received. The two opposite side walls of the first receiving groove are each provided with at least two first locking holes spaced apart along the length direction of the locking wrench and a first sliding groove connecting the first locking holes. The two ends of the first pin can be snapped into and rotated to be limited in the first locking holes on the two opposite side walls of the first receiving groove. When the width of the camp bed (i.e., the length of the support rod) needs to be adjusted, the locking wrench is pulled and unfolded, so that the first pin at the second end of the connecting rod is snapped into different first locking holes on the locking wrench, and then the locking wrench is retracted relative to the fixing seat to complete the width adjustment of the camp bed. Among them, the first sliding groove of the first locking hole is arranged on the side wall of the first receiving groove of the locking wrench to avoid the problem of the user's hand being pinched, which is safer and more reliable.

[0017] Another feasible technical solution adopted by the present invention to solve the second technical problem is: the second end of the connecting rod is connected to a connecting seat that can rotate relative to the connecting rod and a pressing lock rod assembly symmetrically arranged on the left and right sides of the connecting seat, the locking wrench is provided with a first receiving groove for the side of the fixing seat to be received therein, the inner wall of the first receiving groove is provided with at least two second locking holes arranged at intervals along the length direction of the locking wrench and a second sliding groove connecting each second locking hole, the position where each second locking hole meets the second sliding groove is a shrinkage, and each second locking hole and the second sliding groove are both penetrated from the outer wall of the locking wrench to the first receiving groove Groove, each push-lock rod assembly includes a locking rod, a second elastic member and a second push button, the second elastic member is pressed between the locking rod and the connecting seat, and makes the locking rod always have a tendency to move toward the side away from the connecting seat, the outer end of the locking rod passes through the second locking hole or the second sliding groove and is connected to the second push button provided on the outside of the locking wrench, the locking rod includes a large rod portion and a small rod portion arranged in sequence along the axial direction, the large rod portion is away from the second push button, and the small rod portion is close to the second push button, the large rod portion can be stuck in the second locking hole, but cannot slide into the second slide groove through the necking, and the small rod portion can slide into the second slide groove through the necking. The above-mentioned second elastic member can adopt various existing technologies, and can include various elastic elements such as compression springs, torsion springs, and spring leaves, but in order to better cooperate with the above-mentioned connecting seat and locking rod, the second elastic member preferably adopts a compression spring structure. When the width of the camp bed (i.e., the length of the support rod) needs to be adjusted, the locking lever is pulled and the second push button is pressed to release the large rod portion of the locking lever from the second locking hole, then slide into the second chute, move along the second chute and engage with the corresponding second locking hole. The second push button is then released, and the large rod portion of the second push button engages with the second locking hole, preventing it from being released and returning to the second chute. The locking lever is then retracted relative to the fixed base to complete the width adjustment of the camp bed. This push-lock lever assembly, in which the outer wall of the second push button is exposed outside the locking lever, makes unlocking and locking operations more convenient for the user and improves the efficiency of the camp bed width adjustment process.

[0018] The technical solution adopted by the present invention to solve the third technical problem is: a camp bed, including a bed cloth, a first side rod and a second side rod arranged on the left and right sides of the bed cloth, and a support rod device arranged at the bottom of the bed cloth and connected between the first side rod and the second side rod, the support rod device including at least two groups of support rod assemblies arranged at intervals along the length direction of the bed cloth, and the support rod device adopts the above-mentioned support rod device for camp beds.

[0019] Compared with the prior art, the present invention has the following advantages: the locking wrench is rotatably mounted on a first limit block that can move along the length of the first support rod and is rotatably connected to the first support rod via a connecting rod. Thus, when the locking wrench is retracted relative to the second support rod, the connecting rod is also retracted relative to the first support rod, pushing the first limit block to move along the first support rod and contact the second limit block, thereby pushing the second support rod outward to stretch and tighten the bed sheet. Due to the lever principle, the retraction and locking process of the locking wrench is relatively labor-saving, facilitating the assembly and disassembly of the support rod assembly of the camp bed. Furthermore, since the locking wrench is substantially retracted relative to the first support rod after it is retracted relative to the first support rod, that is, the connecting rod and the locking wrench extend in substantially the same direction, the locking wrench is now in a locked position and is not easily loosened, thereby providing a more secure lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of a camp bed according to Example 1 of the present utility model;

[0021] Figure 2 This is a front view of the camp bed of Example 1 of the present utility model (in a first use state);

[0022] Figure 3 This is a schematic diagram of the three-dimensional structure of the camp bed in Example 1 of the present invention without the bed cloth;

[0023] Figure 4 This is a schematic diagram of the three-dimensional structure of the support rod assembly of the camp bed according to Example 1 of the present utility model;

[0024] Figure 5 This is an exploded view of the support rod assembly of the camp bed according to Example 1 of the present utility model;

[0025] Figure 6 for Figure 2 Cross-sectional view at AA in the middle;

[0026] Figure 7 for Figure 2 Cross-sectional view at the middle BB;

[0027] Figure 8 This is a schematic diagram of the three-dimensional structure of the locking wrench and the components provided thereon according to Example 1 of the present utility model;

[0028] Figure 9 for Figure 8 An exploded view of the locking wrench and the components provided thereon shown in FIG.

[0029] Figure 10 This is a schematic diagram of the three-dimensional structure of the support rod assembly of the camp bed according to Example 1 of the present utility model (with the locking wrench in the locked position);

[0030] Figure 11 for Figure 2 Cross-sectional view at CC;

[0031] Figure 12 This is a schematic diagram of the three-dimensional structure of the headstock of Example 1 of the present utility model;

[0032] Figure 13 This is a front view of the headstock of Example 1 of the present utility model;

[0033] Figure 14 This is a schematic diagram of the three-dimensional structure of the headstock of Example 1 of the present utility model from another angle;

[0034] Figure 15 This is a diagram showing the process of the locking lever of the camp bed according to Example 1 of the present utility model being biased from the expanded state to the collapsed state (the camp bed is in the second use state);

[0035] Figure 16 This is a schematic diagram of the three-dimensional structure of the support rod assembly of the camp bed according to Example 2 of the present utility model;

[0036] Figure 17 This is a schematic diagram of the three-dimensional structure of the support rod assembly of the camp bed in Example 2 of the present utility model after omitting components such as the locking wrench;

[0037] Figure 18 This is a schematic diagram of the three-dimensional structure of the locking wrench of the support rod assembly of the camp bed in Example 2 of the present utility model. DETAILED DESCRIPTION

[0038] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0039] In the specification and claims of the present invention, directional terms such as "front," "back," "up," "down," "left," "right," "side," "top," and "bottom" are used to describe various exemplary structural parts and components of the present invention. However, these terms are used herein for convenience of description only and are based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different orientations, these directional terms are intended for illustrative purposes only and should not be construed as limiting. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0040] Example 1

[0041] Figures 1-15The figure shows a preferred embodiment of a support rod device for a camp bed and a camp bed of the present invention. The camp bed includes a bed cloth 5, a first side rod 51 and a second side rod 52 provided on the left and right sides of the bed cloth 5, and a support rod device provided at the bottom of the bed cloth 5 and connected between the first side rod 51 and the second side rod 52. The first side rod 51 and the second side rod 52 are parallel to each other, and the left and right sides of the bed cloth 5 are designed with loops for the first side rod 51 and the second side rod 52 to pass through. The support rod device includes at least two groups of support rod assemblies 1 arranged at intervals along the length direction L of the bed cloth 5, such as Figure 1 Three support rod assemblies 1 are shown, and each support rod assembly 1 is arranged to extend along the width direction W of the bed cloth 5 .

[0042] See also Figure 3 The support rod assembly 1 includes a support rod, a support leg, two headstocks provided at both ends of the length direction of the support rod, and a first support rod 171 and a second support rod 172 respectively provided on the two headstocks. Each headstock is also provided with two support legs.

[0043] See also Figure 4 and Figure 5 The support rods include a first support rod 11 and a second support rod 14, wherein the first end of the first support rod 11 and the first end of the second support rod 14 are sleeved together and can move along the length direction L1 of the first support rod 11. Figure 5 As shown, the second support rod 14 is designed as a hollow pipe structure at least in the portion adjacent to the first end thereof, and has a socket 140 at the first end thereof for inserting the first end of the first support rod 11 therein. In a preferred embodiment, in order to reduce the weight of the camp bed and save material costs, the first support rod 11 and the second support rod 14 are both hollow pipes. The cross-sections of the first support rod 11 and the second support rod 14 are both elliptical structures. The cross-section of the outer peripheral wall of the portion where the first end of the first support rod 11 is located is slightly smaller than the cross-section of the inner hole of the portion where the first end of the second support rod 14 is located, so that the first support rod 11 can be inserted into the inner hole of the second support rod 14 in a plug-in manner, and there will be no significant shaking problem between the two.

[0044] The two headstocks of the support rod assembly 1 include a first headstock 61 disposed at the second end of the first support rod 11 (i.e., the end away from the second support rod 14), and a second headstock 62 disposed at the second end of the second support rod 14. The first headstock 61 and the second headstock 62 have the same structure. The first headstock 61 is rotatably connected to two support legs and a first support rod 171. The two support legs on the first headstock 61 are respectively referred to as the first support leg 161 and the second support leg 162. The second headstock 62 is rotatably connected to two support legs and a second support rod 172. The two support legs on the second headstock 62 are respectively referred to as the third support leg 163 and the fourth support leg 164. Specifically, the bottom of the first frame headstock 61 has an upwardly recessed second receiving groove 66 extending parallel to the length of the support rod. One end of a first support rod 171 is pivotally connected to two opposing sidewalls of the second receiving groove 66 via a pin 91. When deflected upward to its limit position, the first support rod 171 tilts upward, away from the second frame headstock 62. The other end of the first support rod 171 is connected to the first sidebar 51. Specifically, the other end of the first support rod 171 is provided with a first retaining notch 1710, opening outward (i.e., facing away from the second frame headstock 62). The first sidebar 51 can be snapped into the first retaining notch 1710. The limit position of the first support rod 171's upward deflection is defined by the corresponding edge of the second receiving groove 66. Furthermore, the second receiving groove 66 also ensures that the deflection direction of the first support rod 171 remains substantially in a single plane throughout its entire deflection process, preventing left and right sway and ensuring the reliable support of the first support rod 171. When the first support rod 171 is deflected downward to the extreme position, it is received in the second receiving groove 66 of the first frame head seat 61. Similarly, the bottom of the second frame head seat 62 also has a second receiving groove 66 that is recessed upward and extends in a direction parallel to the length of the support rod. One end of the second support rod 172 is rotatably connected to the two opposite side walls of the second receiving groove 66 via a pin 92. When deflected upward to the extreme position, the second support rod 172 tilts from bottom to top toward the side away from the first frame head seat 61. The other end of the second support rod 172 is connected to the second side rod 52. Specifically, the other end of the second support rod 172 is provided with a second retaining opening 1720 with an opening facing outward (i.e., the opening is away from the side where the first frame head seat 61 is located), and the second side rod 52 is retained in the second retaining opening 1720. The upper limit of the second support rod 172's upward deflection can be defined by the corresponding edge of the second receiving groove 66. Furthermore, the second receiving groove 66 also limits the deflection direction of the second support rod 172 to be substantially in a plane throughout its entire deflection process, preventing left and right deflection and ensuring the support reliability of the second support rod 172. When the second support rod 172 deflects downward to its upper limit, it is received in the second receiving groove 66 of the second frame headstock 62.

[0045] See also Figure 12-14The structure of the first headstock 61 is the same as that of the second headstock 62. The connection and cooperation structure between the first headstock 61 and the first supporting leg 161, the second supporting leg 162, the first strut 171 and other components is also the same as the connection and cooperation structure between the second headstock 62 and the third supporting leg, the fourth supporting leg, the second strut 172 and other components. The following is explained using the first headstock 61 as an example: the two supporting legs (that is, the first supporting leg 161 and the second supporting leg 162) are rotatably arranged on the front and rear opposite side walls of the first headstock 61. Specifically, the first frame headstock 61 is provided with a first axial hole 64 extending from its front sidewall through its rear sidewall. A freely rotatable rotation pin 71 is inserted into this first axial hole 64. The two ends of the rotation pin 71 are exposed from the front and rear sidewalls of the first frame headstock 61 and inserted into the second axial holes 1601 of the front and rear support legs, respectively. Both front and rear support legs are connected to the rotation pin 71 via a positioning pin 72 that radially extends through the second axial hole 1601. This allows the front and rear support legs to rotate synchronously; that is, rotating one leg also causes the other to rotate synchronously. More specifically, the front and rear walls of the first frame headstock 61, adjacent to the rotation pin 71, are formed with guide ramps 63 that gradually deviate the support legs from the vertical direction during deflection and deployment relative to the support rod. After the support legs are deflected and deployed to a predetermined position, they are tilted at a predetermined angle to the vertical direction. Thus, during the corresponding deflection and deployment process, the guide ramps 63 guide the support legs and automatically open them into a figure-eight configuration. The use of an "eight"-shaped support leg arrangement ensures greater stability and reliability. When fully deflected and extended, the support legs typically form an angle of approximately 20° relative to the vertical direction. Furthermore, the front and rear walls of the first headstock 61 are each provided with a first stopper 691 to limit the downwardly biased extension of the corresponding support leg to its extreme angular position, and a second stopper 692 to limit the upward retraction of the corresponding support leg to its extreme angular position. Specifically, the first stopper 691 and the second stopper may be steps formed by the front and rear thickness variations of the first headstock. When the support legs are downwardly biased and extended to their extreme angular position, they tilt downward toward the side away from the second headstock 62, ensuring reliable support when subjected to gravity during use. When the support legs are upwardly biased and extended to their extreme angular position, their extension direction is substantially parallel to the extension direction of the support rods. More specifically, when the front and rear support legs of the first headrest 61 and the first support rod 171 are folded, the first support rod 171 is located between the front and rear support legs, that is, the three are folded side by side at the bottom of the support rod.The second axial hole 1601 on the front and rear support legs is designed as a movable hole for the support legs to deflect relative to the rotation pin 71 around the positioning pin 72. It can generally be designed as a strip hole, an elliptical hole, or a conical hole structure with a larger outside and a smaller inside, whose extension direction is basically perpendicular to the positioning pin 72, so as to avoid the second axial hole 1601 on the support leg from interfering with the tilting, deflecting and opening process of the support leg.

[0046] To ensure the support leg remains stably in this position after being deflected downward and extended, the first head frame is further provided with a second elastic protrusion 33 that is exposed relative to the side wall of the head frame and can elastically expand and contract. A second retaining groove 160 is defined on the side wall of the first end of the support leg at a position corresponding to the second elastic protrusion 33. When the support leg is deflected downward to its extreme position (i.e., when it abuts against the first limit stop 691 of the first head frame 61), the second elastic protrusion 33 can be snapped into the second retaining groove 160, preventing the support leg from deflecting backward and ensuring the reliability of the support leg.

[0047] See also Figure 11 In some embodiments, the second elastic buckle 33 comprises an overall arc-shaped or V-shaped spring clip, two buckle portions 332 disposed on the spring clip, and operating portions 333 disposed at each end of the spring clip. The two buckle portions 332 are symmetrically disposed on opposite sides of the spring clip and each protrudes outward. The top ends of the two buckle portions 332 are designed as outwardly convex curved surfaces. The two operating portions 333 can be plastic components attached to the ends of the spring clip, and can be relatively large in size. Anti-slip grooves can be provided on the two operating portions. Second through-holes 65 extending through the second receiving groove 66 are also defined on two opposing side walls of the first frame header 61. A second positioning groove 660 shaped to match the shape of the spring clip body is also defined on the inner wall of the second receiving groove 66 of the first frame header 61. When the second elastic buckle 33 is installed, the spring clip body is positioned within the second positioning groove 660, and the two buckle portions 332 are exposed on the front and rear side walls of the first frame header 61 through the two second through-holes 65, respectively. The bottom of the opposing sidewalls of the first headstock 61 further includes an upwardly recessed operating opening 67 extending laterally through the second receiving recess 66. The two operating portions 333 of the second elastic protrusion 33 are located at the two operating openings 67, with the bottom of the second elastic protrusion 33 being higher than the bottom of the first headstock 61. Providing the operating openings 67 on the opposing sidewalls of the headstock also facilitates a user to directly press the operating portions 333 from the side, releasing the second elastic protrusion 33 from locking the support legs, allowing the support legs to quickly deflect and retract.

[0048] In this embodiment, the support legs on each headstock are rotatably connected to the headstock, and as the rotational position of each support leg relative to the headstock changes, the camp bed has at least a first use state and a second use state: in the first use state, each support leg is deflected downward relative to the support rod and unfolded to serve as a support portion for contacting the ground, thereby being used as a high bed, see Figure 2 In the second use state, each support leg is deflected and retracted upward relative to the support rod and shifted to a position higher than the bottom of the frame head, so that each frame head serves as a support part for contacting the ground, thereby being used as a low bed. For details, see Figure 15 The camp bed with this structural design allows users to choose the appropriate height according to their needs, meets the needs of different users, and improves the user's actual use experience.

[0049] Generally speaking, the height of the camp bed in the first usage state as a high bed can be designed to be about 396 mm, and the height of the camp bed in the second usage state as a low bed can be designed to be about 205 mm.

[0050] The front and rear supporting legs of each headstock are symmetrically arranged about the headstock. In the first usage state, the two supporting legs are spaced apart from each other at one end away from the headstock, forming an eight-shaped arrangement, making the bed more stable and reliable. In the second usage state, the two supporting legs are spaced apart from each other at one end away from the headstock, forming a side-by-side arrangement, making the supporting legs in the folded state more compact, smaller in size, and occupying less space.

[0051] In order to ensure the stability of the camp bed when used as a low bed, the bottom surface of each headrest is generally set as a flat wall structure, on which an anti-slip groove 68 can be opened. Figure 14 .

[0052] See also Figure 5 The first end of the first support rod 11 of the support rod assembly 1 and the first end of the second support rod 14 can be separated, that is, the two can be disassembled and stored, wherein the first support rod 11 and the second support rod 14 are also connected by an elastic rope 80 provided in the inner holes of the two, so that the user can easily identify the pairing during assembly.

[0053] The first support rod 11 is also provided with a fixing seat 13 and a first limit block 12. The first limit block 12 is closer to the second support rod 14 and is arranged adjacent to the first end of the first support rod 11. The first limit block 12 can move along the length direction L1 of the first support rod 11. In some embodiments, the first limit block 12 can be a sliding sleeve mounted outside the first support rod 11. The first end of the second support rod 14 is provided with a second limit block 141. The second limit block 141 is a fixed sleeve mounted outside the first end of the second support rod 14 and fixed relative to the second support rod 14. After the first end of the first support rod 11 is inserted into the socket 140 of the second support rod 14, the sliding sleeve on the first support rod 11 can form a limit fit with the fixed sleeve on the second support rod 14 in the length direction of the first support rod 11. A locking wrench 2, which can be expanded and retracted relative to the first support rod 11, is rotatably connected to the first limit stop 12. Specifically, the first end of the locking wrench 2 is rotatably connected to the bottom of the sliding sleeve around a pin 93 extending forward and backward. Furthermore, the locking wrench 2 is rotatably connected to the fixing seat 13 of the first support rod 11 via a connecting rod 4. The first end of the connecting rod 4 is rotatably connected to the bottom of the fixing seat 13 via a pin 94, and the second end of the connecting rod 4 is rotatably connected to the locking wrench 2. The pin 94 rotatably connecting the connecting rod 4 to the fixing seat 13 and the pin 93 rotatably connecting the connecting rod 4 to the locking wrench 2 both extend in the forward and backward direction.

[0054] Figure 15 The diagram shows a process in which the locking lever 2 of the support rod assembly of the camp bed is deflected from the expanded state to the folded state. Figure 15 Figure a shows the state where the first end of the first support rod 11 has just been inserted into the socket 140 of the first end of the second support rod 14. At this time, the locking wrench 2 is in the extended state, the distance m1 between the first limit block 12 and the fixing seat 13 is relatively small, and the first limit block 12 and the second limit block 141 of the second support rod 14 have not yet abutted against each other. When the first support rod 11 and the second support rod 14 are properly inserted, the first limit block 12 can abut against the second limit block 141 of the second support rod 14. At this time, the length of the entire support rod assembly is smaller than the size of the bed sheet. It can be understood that in this state, the bed sheet has not been tightened and is in a relatively loose state. Figure 15Figure b in FIG. 2 shows the state of the locking lever 2 as it gradually deflects and retracts around its first end relative to the first support rod 11 to a certain angle (the locking lever is not fully retracted). During this process, the first limit stop 12 moves away from the fixing seat 13. Simultaneously, the second limit stop 141 of the second support rod 14, pressed by the first limit stop 12, also moves away from the fixing seat 13, that is, moves outward relative to the first support rod 11. The solid arrow in FIG. b indicates the direction of the outward movement of the second support rod 14. At this point, the distance m2 between the first limit stop 12 and the fixing seat 13 is greater than m1, and the length of the entire support rod assembly is slightly smaller than the size of the bed sheet. It can be understood that in this state, the bed sheet is about to be tightened, but not yet fully tightened. Figure 15 Figure c in the figure shows the locking lever 2 fully retracted relative to the first support rod 11. During the movement from Figure b to Figure c, the first limit stop 12, driven by the locking lever 2, continues to move away from the fixing seat 13. The second limit stop 141 of the second support rod 14, pressed against by the first limit stop 12, also continues to move away from the fixing seat 13, thereby fully tightening the bed sheet. When the locking lever 2 is retracted, the distance m3 between the first limit stop 12 and the fixing seat 13 is greater than m2. Due to the principle of leverage, the process of tightening the bed sheet 5 by retracting the locking lever 2 relative to the first support rod 11 is relatively labor-saving, facilitating the installation of the support rod assembly 1 of the camp bed. In addition, since the locking wrench 2 is retracted relative to the first support rod 11, the connecting rod 4 is also basically in a retracted state relative to the first support rod 11, that is, the extension direction of the connecting rod 4 is basically consistent with that of the locking wrench 2, and is basically consistent with the length direction of the first support rod 11. Therefore, the locking wrench 2 is in a locked state at this time, is not easy to loosen, and is locked more securely.

[0055] In order to reduce the friction between the first limit block 12 and the first support rod 11 and make the sliding process of the first limit block 12 relative to the first support rod 11 smoother, at least two guide ribs 120 are distributed along the circumferential direction on the inner circumferential wall of the sliding sleeve, both of which protrude outward and extend along the length direction of the first support rod 11. Figure 6 There are shown eight guide ribs 120. The fixing seat 13 can be a plastic piece wrapped around the outside of the main body of the first support rod 11.

[0056] In order to further ensure the reliability of the locking wrench 2 in the retracted state relative to the fixing seat 13, when the locking wrench 2 is in the retracted state, the locking wrench 2 and the fixing seat 13 are locked by a locking assembly. In this embodiment, the side of the locking wrench 2 facing the fixing seat 13 is provided with a first receiving groove 20 in which the side of the fixing seat 13 can be received. The locking assembly includes a first elastic protrusion 31 and a first push button 25, wherein the first elastic protrusion 31 is provided on the fixing seat 13, specifically, the interior of the fixing seat 13 defines a placement chamber 130, and the front and rear side walls of the fixing seat 13 are provided with a first through hole 131 that passes through to the placement chamber 130, and there are two first elastic protrusions 31, which are respectively provided at the two first through holes 131. As Figure 7 As shown, the first elastic protrusion 31 includes a first boss and a stopper extending radially outward from the outer wall of the inner end of the first boss. The outer end of the first boss is designed as an outwardly convex arc surface. When the first elastic protrusion 31 is installed, the first boss is movably retained in the first through-hole 131 of the fixing base 13, and the outer end is exposed relative to the front and rear sidewalls of the fixing base 13. The stopper of the first boss is correspondingly retained inside the circumference of the first through-hole 131 to prevent the first elastic protrusion from escaping outward through the first through-hole 131. A first elastic member 32 is also provided between the two first elastic protrusions 31 to force the two first elastic protrusions 31 to move away from each other. The first elastic member 32 can be a spring. The inner ends of the two first elastic protrusions 31 have corresponding spring positioning holes, and the two ends of the spring are respectively retained in the spring positioning holes of the two first elastic protrusions 31.

[0057] See also Figure 7 The first receiving groove 20 of the locking wrench 2 is provided on two opposing side walls with first retaining grooves 21 into which the outer ends of the first elastic protrusions 31 snap in. A first push button 25 is provided on the outer wall of the locking wrench 2 at a position corresponding to the first retaining grooves 21. The first push button 25 comprises a push button body 251 and a push rod 252 connected to the push button body 251. The push rod 252 extends from the outer wall of the locking wrench 2 into the first retaining groove 21 and is movable axially along the first retaining groove. The inner end of the push rod 252 is further provided with a second radially outwardly protruding stopper, which prevents the push rod 252 from being removed from the locking wrench 2. After the locking wrench 2 is deflected and retracted relative to the fixing base 13, the first elastic protrusion 31 on the fixing base 13 can automatically snap into the first locking groove 21 of the locking wrench 2. When the locking wrench 2 needs to be unlocked, the user presses the first push button 25 to drive the first protrusion of the first elastic protrusion 31 to retract and disengage from the first locking groove 21, and then pulls the locking wrench 2 downward. In other optional embodiments, the first elastic member 32 can also be omitted, and the two first elastic protrusions 31 are designed as an integrated spring structure, such as a V-shaped or arc-shaped spring structure 331, which has a certain degree of deformation elastic reset capability.

[0058] A first guide slope 201 is further provided on the two opposite side walls of the first receiving groove 20 of the locking wrench 2 at an opening position adjacent to the first receiving groove 20, and a second guide slope 202 is provided at a position corresponding to the outside of the position of the first card slot 21, which can be used to guide the first elastic protrusion 31 of the fixing seat 13 to smoothly enter the first receiving groove 20 and be correspondingly engaged in the first card slot 21 of the locking wrench 2.

[0059] In some embodiments, the second end of the connecting rod 4 can be directly rotatably connected to the locking wrench 2 via a fixed pin. However, with this connection method, the overall length of the support rod is fixed and cannot be adjusted. In other words, the width of the camp bed is fixed and cannot be adjusted. To achieve the purpose of adjustable support rod length, in a preferred embodiment, the connecting rod 4 is a flat strip-shaped plate structure. The second end of the connecting rod 4 is connected to a connecting seat 42 that can rotate relative to the connecting rod 4 and a push-lock rod assembly symmetrically arranged on the left and right sides of the connecting seat 42. To facilitate assembly, the connecting seat 42 includes two sub-seat bodies 421, which are symmetrically arranged on the front and rear sides of the connecting rod 4. Specifically, the sub-seat bodies 421 are generally disc-shaped, and the two opposing side surfaces of the two sub-seat bodies 421 have second protrusions 4213 extending oppositely. During assembly, the second protrusions 4213 of the two sub-seat bodies 421 are inserted into the axial hole at the second end of the connecting rod 4, thereby serving as a pin structure for the connecting rod 4 to rotate relative to the connecting seat 42. The two distal side surfaces of the two sub-seat bodies 421 are each provided with an inwardly concave first positioning groove 4211. The bottom wall of the first positioning groove 4211 also includes an outwardly extending positioning post 4212. The inner wall of the first receiving groove 20 of the locking wrench 2 is provided with at least two second locking holes 241 spaced apart along the length of the locking wrench 2, and a second slide 242 connecting the second locking holes 241. Each second locking hole 241 and second slide 242 extends from the outer wall of the locking wrench 2 to the first receiving groove 20. The second slide 242 is a substantially linear groove and is located on the same side of the row of locking holes formed by the second locking holes 241. Each second locking hole 241 and second slide 242 is formed at a constricted portion 243 where it meets the second locking hole 241.

[0060] See also Figure 8 and Figure 9 Each pressing lock rod assembly includes a lock rod 43, a second elastic member 44 and a second pressing button 45.

[0061] The locking rod 43 includes a large rod portion 431 and a small rod portion 432, arranged axially in sequence. The large rod portion 431 is positioned away from the second push button 45, while the small rod portion 432 is positioned closer to the second push button 45. The end of the small rod portion 432 is connected to the middle portion of the second push button 45. The outer diameter of the large rod portion 431 of the locking rod 43 is smaller than the inner diameter of the second locking hole 241, but larger than the width of the constriction 243. This allows the large rod portion 431 to fit into the second locking hole 241 but prevents it from sliding into the second slide groove 242 through the constriction 243. The outer diameter of the small rod portion 432 of the locking rod 43 is smaller than the width of the constriction 243. This allows the small rod portion 432 to slide between the second slide groove 242 and the corresponding second locking hole 241 through the constriction 243. The outer peripheral wall of the large rod portion 431 of the locking rod 43 further includes a radially outwardly extending limiting flange 433. The outer diameter of the limiting flange 433 is larger than the inner diameter of the second locking hole 241 and can abut against the inner side of the circumference of the second locking hole 241 to form a limit, preventing the locking rod 43 from slipping out of the second locking hole 241. The second elastic member 44 is preferably a compression spring, which abuts between the locking rod 43 and the connecting seat 42. Specifically, the inner end of the locking rod 43 is axially defined with a guide channel 434 that is compatible with the positioning post 4212 of the sub-seat body 421. The positioning post 4212 is movably inserted into the guide channel 434 of the locking rod 43. The spring is sleeved outside the positioning post 4212 of the sub-seat body 421 and the large rod portion 431 of the locking rod 43, with one end abutting against the limiting flange 433 of the locking rod 43 and the other end abutting against the main body of the sub-seat body 421. The outer end of the locking rod 43 passes through the second locking hole 241 or the second sliding groove 242 and is connected to the second push button 45 provided on the outside of the locking lever 2. When the width of the cot (i.e., the length of the support rod) needs to be adjusted, the locking lever 2 is pulled and expanded, and the second push button 45 is pressed inward, causing the large rod portion 431 of the locking rod 43 to move inward from the second locking hole 241, then slide into the second sliding groove 242, and move along the second sliding groove 242 to engage with the corresponding second locking hole 241. The second push button 45 is then released. Under the elastic force of the second elastic member 44, the large rod portion 431 of the second push button 45 automatically engages with the second locking hole 241, preventing it from being dislodged and returning to the second sliding groove 242. The locking lever 2 is then retracted relative to the fixing base 13 to complete the cot width adjustment. Since the second pressing button 45 of the locking rod assembly is pressed to expose the outer wall of the locking wrench 2, it is convenient for the user to press it directly, thereby making the unlocking and locking operations more convenient for the user and the width adjustment process of the camp bed more efficient.

[0062] like Figure 15As shown in the figure, the second locking holes 241 on the locking wrench 2 of this embodiment have three groups arranged at intervals along the length direction of the locking wrench 2. As a result, the width of the camp bed can be adjusted in three gears, such as the first gear is the shortest bed distance, the size can be 1200mm, the second gear is the middle bed distance, the size can be 1230mm; the third gear is the longest bed distance, the size can be 1260mm.

[0063] Example 2

[0064] Figure 16-18 Another preferred embodiment of the camp bed support rod device and camp bed of the present invention is shown. This embodiment differs from the first embodiment in that the locking hole on the locking wrench 2 is positioned differently, as is the structure of the rotational connection with the second end of the connecting rod 4. The locking assembly between the locking wrench 2 and the fixing base 13 is also different, as follows:

[0065] The second end of the connecting rod 4 has a first pin 41 extending forward and backward, wherein the first pin 41 can be attached to the second end of the connecting rod 4 via a corresponding plastic component. The first receiving groove 20 of the locking wrench 2 has at least two first locking holes 231 spaced apart along the length of the locking wrench 2, and a first sliding groove 232 connecting the first locking holes 231. The first locking holes 231 and the first sliding groove 232 do not penetrate the side walls of the locking wrench 2. The two ends of the first pin 41 on the connecting rod 4 (which can be configured as an axially retractable elastic retractable shaft structure) can be snapped into and rotatably retained in the first locking holes 231 on the two opposing side walls of the first receiving groove 20. To adjust the width of the cot (i.e., the length of the support rods), the locking lever 2 is pulled downward to expand, causing the first pin 41 at the second end of the connecting rod 4 to slide out of the current first locking hole 231, into the first sliding groove 232, and then into the next first locking hole 231. The locking lever 2 is then retracted relative to the fixing base 13 to complete the cot width adjustment. The first sliding groove 232 of the first locking hole 231 is positioned on the inner sidewall of the first receiving recess 20 of the locking lever 2, thereby preventing the user's hand from being pinched, providing greater safety and reliability.

[0066] The first receiving groove 20 of the locking wrench 2 is provided with third limit blocks 22 on the opposite side walls. The two third limit blocks 22 are protruding bump structures that extend toward each other. The two opposite side walls of the fixing seat 13 are provided with limit ribs 132 that protrude outward and can form a limiting fit with the third limit blocks 22. The limit blocks and limit ribs 132 together constitute a locking assembly between the locking wrench 2 and the fixing seat 13. The first receiving groove 20 of the locking wrench 2 is provided with second guide bevels 202 adjacent to the opening of the first receiving groove 20. The second guide bevels 202 are positioned corresponding to the outer side of the third limit blocks 22 and can be used to guide the limit ribs 132 of the fixing seat 13 to pass over the third limit blocks 22 and smoothly enter the first receiving groove 20. They form a limit fit with the third limit blocks 22 to prevent the locking wrench 2 from falling off the fixing seat 13.

Claims

1. A support rod device for a camp bed, comprising a support rod assembly (1), characterized in that: The support rod assembly (1) comprises a first support rod (11) and a second support rod (14); the first end of the first support rod (11) and the first end of the second support rod (14) are sleeved together and can move relative to each other in the length direction (L1) of the first support rod (11); the first support rod (11) is provided with a first limit block (12) capable of moving along the length direction (L1) of the first support rod (11) at a position adjacent to the first end thereof; the second support rod (14) is provided with a second limit block (141) capable of forming a limit fit with the first limit block (12) in the length direction (L1) of the first support rod (11); the first limit block A locking wrench (2) is rotatably connected to the stopper (12) and can be expanded and retracted relative to the first support rod (11). The locking wrench (2) and the first support rod (11) are rotatably connected via a connecting rod (4). The first end of the connecting rod (4) is rotatably connected to the first support rod (11), and the second end of the connecting rod (4) is rotatably connected to the locking wrench (2). When the locking wrench (2) is in a retracted state, the connecting rod (4) is retracted relative to the first support rod (11), and the locking wrench (2) pushes the first limit stopper (12) to move along the first support rod (11) and abut against the second limit stopper (141).

2. The support rod device for a camp bed according to claim 1, characterized in that: The first end of the second support rod (14) has a socket (140) into which the first end of the first support rod (11) can be inserted; the first limit block (12) is a sliding sleeve sleeved outside the first support rod (11); and the second limit block (141) is a fixed sleeve sleeved outside the first end of the second support rod (14) and fixed relative to the second support rod (14).

3. The support rod device for a camp bed according to claim 2, characterized in that: At least two guide ribs (120) are distributed along the circumferential direction on the inner peripheral wall of the first limiting block (12), both protruding outward and extending along the length direction of the first support rod (11).

4. The support rod device for a camp bed according to claim 1, characterized in that: A fixing seat (13) is provided on the first support rod (11) at a side of the first limit block (12) away from the second support rod (14); when the locking wrench (2) is in a retracted state, the locking wrench (2) and the fixing seat (13) are locked via a locking assembly.

5. The support rod device for a camp bed according to claim 4, characterized in that: The locking wrench (2) is provided with a first receiving groove (20) on a side facing the fixing seat (13) in which the side of the fixing seat (13) can be received. The locking assembly includes a first pressing button (25) and a first elastic protrusion (31). The first elastic protrusion (31) is provided on the fixing seat (13) and can be elastically retracted. The inner wall of the first receiving groove (20) of the locking wrench (2) is provided with a first clamping groove (21) in which the first elastic protrusion (31) can be clamped. The first pressing button (25) is provided on the outer wall of the locking wrench (2) and corresponds to the first clamping groove (21). The first pressing button (25) includes a pressing button body (251) and a push rod (252) connected to the pressing button body (251) and movably limited in the first clamping groove (21).

6. The support rod device for a camp bed according to claim 4, characterized in that: The locking wrench (2) is provided with a first receiving groove (20) on a side facing the fixing seat (13) in which the side of the fixing seat (13) can be received. The locking assembly includes a first pressing button (25), a first elastic member (32) and a first elastic convex buckle (31). The inner wall of the first receiving groove (20) of the locking wrench (2) is provided with a first card slot (21) in which the first elastic convex buckle (31) can be snapped in. The first pressing button (25) is provided on the outer wall of the locking wrench (2) and corresponds to the first card slot (21). The first pressing button (25) includes A push button body (251) and a push rod (252) connected to the push button body (251) and movably limited in the first card slot (21); the interior of the fixing seat (13) defines a placement chamber (130); two opposite side walls of the fixing seat (13) are each provided with a first through hole (131) that passes through the placement chamber; there are two first elastic protrusions (31), which are movably limited in the two first through holes (131) respectively; the first elastic member is arranged between the two first elastic protrusions (31), and the two first elastic protrusions (31) have a tendency to move away from each other.

7. The support rod device for a camp bed according to claim 4, characterized in that: The locking wrench (2) is provided with a first receiving groove (20) on one side facing the fixing seat (13) and capable of receiving the side of the fixing seat (13). The locking assembly comprises a third limiting block (22) and a limiting rib (132). There are two third limiting blocks (22). The two third limiting blocks (22) protrude from two opposite side walls of the first receiving groove (20) in a direction approaching each other. There are two limiting ribs (132). The two limiting ribs (132) protrude outward from two opposite side walls of the fixing seat (13) and can form a limiting fit with the two third limiting blocks (22).

8. The support rod device for a camp bed according to any one of claims 4 to 7, characterized in that: The second end of the connecting rod (4) has a first pin shaft (41), and the locking wrench (2) is provided with a first receiving groove (20) on the side facing the fixing seat (13) so as to accommodate the side portion of the fixing seat (13). The first receiving groove (20) has at least two first locking holes (231) arranged at intervals along the length direction of the locking wrench (2) and a first sliding groove (232) connecting the first locking holes (231). The two ends of the first pin shaft (41) can be inserted into and rotatably limited in the first locking holes (231) on the two opposite side walls of the first receiving groove (20).

9. The support rod device for a camp bed according to any one of claims 4 to 7, characterized in that: The second end of the connecting rod (4) is connected to a connecting seat (42) that can rotate relative to the connecting rod (4) and a pressing lock rod assembly symmetrically arranged on the left and right sides of the connecting seat (42), and the locking wrench (2) is provided with a first receiving groove (20) on the side facing the fixing seat (13) for receiving the side of the fixing seat (13), and the inner wall of the first receiving groove (20) is provided with at least two second locking holes (241) arranged at intervals along the length direction of the locking wrench (2) and a second sliding groove (242) connecting each second locking hole (241), the position where each second locking hole (241) connects with the second sliding groove (242) is a shrinkage (243), and each second locking hole (241) and the second sliding groove (242) are both passed through the outer wall of the locking wrench (2) to the first receiving groove (20), and each pressing lock rod assembly includes a locking rod (43), a second elastic member (44) and a second pressing lock rod assembly. The second elastic member (44) is pressed between the locking rod (43) and the connecting seat (42), and the locking rod (43) always has a tendency to move toward the side away from the connecting seat (42). The outer end of the locking rod (43) passes through the second locking hole (241) or the second sliding groove (242) and is connected to the second pressing button (45) provided outside the locking wrench (2). The locking rod (43) includes a large rod portion ( 431) and a small rod (432), the large rod (431) is away from the second push button (45), and the small rod (432) is close to the second push button (45), the large rod (431) can be inserted into the second lock hole (241), but cannot slide into the second slide groove (242) through the shrinkage (243), and the small rod (432) can slide into the second slide groove (242) through the shrinkage (243).

10. A camp bed comprising a bed cloth (5), a first side rod (51) and a second side rod (52) provided on the left and right sides of the bed cloth (5), and a support rod device provided at the bottom of the bed cloth (5) and connected between the first side rod (51) and the second side rod (52), the support rod device comprising at least two groups of support rod assemblies (1) arranged at intervals along the length direction of the bed cloth (5), characterized in that: The support rod device adopts the support rod device for a camp bed according to any one of claims 1 to 7.

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