Camp bed

Abstract

The utility model relates to a camp bed, which comprises a supporting rod assembly, a supporting rod assembly and a supporting rod assembly, the supporting rod assembly comprises a supporting rod and frame head seats arranged at the two end parts of the supporting rod in the length direction, and each frame head seat is also provided with a supporting leg; the supporting legs on the frame head seat are rotationally connected to the frame head seat, and the camp bed at least has a first use state and a second use state along with the change of the rotating positions of the supporting legs relative to the frame head seat: in the first use state, the supporting legs are downwards deflected and unfolded relative to the supporting rods to serve as supporting parts for being in contact with the ground; in the second use state, the supporting legs deflect upwards relative to the supporting rods to be folded and moved to the positions higher than the bottoms of the frame head bases, and the frame head bases serve as supporting parts used for making contact with the ground. The camp bed has the advantage that a user can select a proper height according to needs.

Description

Technical Field

[0001] This utility model relates to the field of folding bed technology, and in particular to a folding bed. Background Technology

[0002] Camp beds are typically made of wood or metal frames bound with materials such as canvas, and can be folded into a small size for easy carrying. They are particularly suitable for use in outdoor camping, fishing, and wilderness exploration. In the civilian sector, camp beds are also widely used in hospital care and office lunch breaks.

[0003] For example, Chinese utility model patent application CN202221604387.8 discloses a foldable, compact cot, including parallel and spaced-apart first and second side rods. The first and second side rods are connected by multiple foldable bottom support components, which are spaced apart along a straight line. One end of each bottom support component is detachably connected to the first side rod, and the other end is detachably connected to the second side rod. Each bottom support component includes a first support leg and a second support leg hinged together. Both the first and second support legs include arc-shaped struts, and strut locks are installed at the hinge points of the arc-shaped struts. The strut lock includes a lock seat fitted over the arc-shaped struts. The middle of the lock seat is hinged to two arc-shaped struts via a pivot. One side of the lock seat is detachably 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 detachably connected to another arc-shaped strut via a pin.

[0004] The cot described in the aforementioned patent application has certain shortcomings in actual use: When in use, the support legs are inserted into the connecting base, and once the legs are in place, the height of the cot is fixed. Users cannot choose a suitable height based on their actual needs or environmental limitations, resulting in a relatively poor user experience. Therefore, the existing cot requires further improvement. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a cot that allows users to choose the appropriate height according to their needs, in light of the current state of the technology.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a cot, comprising:

[0007] Bed sheet;

[0008] The first and second side bars are arranged side by side and are respectively located on the left and right sides of the bed sheet;

[0009] A support rod assembly is disposed at the bottom of the bed sheet. The support rod assembly extends along the width direction of the bed sheet and is connected between the first side rod and the second side rod. The support rod assembly includes a support rod and a frame seat disposed at both ends of the support rod in the length direction. The frame seat is also provided with support feet.

[0010] The support legs on the headstock are rotatably connected to the headstock, and as the position of each support leg changes relative to the headstock, the cot has at least a first use state and a second use state:

[0011] In the first usage state, each of the support legs deflects downward relative to the support rod and unfolds to serve as a support part for contacting the ground;

[0012] In the second usage state, each of the support legs deflects upward relative to the support rod and retracts to a position higher than the bottom of the frame head, so that each of the frame head serves as a support for contacting the ground.

[0013] As an improvement, each headrest is connected to two support legs, which are symmetrically arranged about the headrest. In the first usage state, the ends of the two support legs furthest from the headrest are arranged in a V-shape. In the second usage state, the ends of the two support legs furthest from the headrest are brought closer together and arranged side by side. In the first usage state, the bed frame is supported by the support legs, and the bed height is relatively high. The V-shape arrangement of the support legs makes the bed frame more stable and reliable. In the second usage state, the bed frame is supported by the headrest itself, and the bed height is relatively low. This also ensures the stability of the bed frame. The side-by-side arrangement of the ends of the two support legs furthest from the headrest also makes the support legs more compact in the folded state, resulting in a smaller size and less space occupation.

[0014] In order to enable the support legs to automatically open into a figure-eight shape during the corresponding deflection and unfolding process, the first ends of the two support legs are connected to the headstock by a rotating pin. The side wall of the headstock adjacent to the rotating pin is constructed as a guide slope that allows the support legs to gradually deviate from the vertical direction during the deflection and unfolding process relative to the support rod.

[0015] To simplify the rotating connection structure of the support legs, the first ends of the two support legs are rotatably connected to the headstock via the same rotating pin.

[0016] In order to achieve synchronous deployment of the two support legs on the same frame head, the frame head is provided with a first shaft hole that passes through the two opposite side walls. The rotating pin is inserted in the first shaft hole with both ends exposed. The first ends of the two support legs are connected to the two ends of the rotating pin through positioning pins, so that the two support legs can rotate synchronously around the rotating pin.

[0017] To avoid interference from the second shaft hole on the support foot during the tilting and deflection opening process, the first ends of the two support feet are provided with a second shaft hole for the end drive of the rotating pin. The second shaft hole is constructed as a movable hole that allows the support foot to deflect around the positioning pin.

[0018] In order to ensure that the support leg can be stably maintained in this state after deflection and deployment, the headstock is also provided with a second elastic buckle that can be exposed relative to the side wall of the headstock and can elastically extend and retract. A second slot is provided on the side wall of the first end of the support leg at a position corresponding to the second elastic buckle. When the support leg is in the first use state, the second elastic buckle is engaged in the second slot.

[0019] To simplify the structure of the second elastic buckle, it includes an arc-shaped or V-shaped spring piece, two buckle portions on the spring piece, and operating portions at both ends of the spring piece. The bottom of the headstock has a second recessed groove that extends upwards along the length of the support rod. Two through holes are also provided on the two opposite sidewalls of the headstock, leading to the second recessed groove. The second elastic buckle is located within the second recessed groove, with its two buckle portions exposed through the two second through holes. The bottom of the opposite sidewalls of the headstock also has an upward-recessed operating opening that extends laterally into the second recessed groove. The two operating portions of the second elastic buckle are located at the two operating openings. The aforementioned second recessed groove facilitates the disassembly and installation of the second elastic buckle. The operating openings on the opposite sidewalls of the headstock also allow the user to directly press the operating portion of the second elastic buckle from the side to release the second elastic buckle from locking the support leg, allowing the support leg to quickly deflect and retract.

[0020] As an improvement, the two headstocks of the support rod assembly also have a first support rod and a second support rod extending obliquely upwards. The ends of the first and second support rods are rotatably connected to the corresponding headstocks, and each has an extended state relative to the support rod and a retracted state relative to the support rod. The bottom of the headstock has a second storage groove that is recessed upwards and extends along the length of the support rod. When the first or second support rod is in the retracted state, it is stored in the second storage groove of the corresponding headstock. It is conceivable that the first and second support rods described above can also be detachably connected to the corresponding headstocks by a plug-in connection.

[0021] To prevent the cot from sliding relative to the ground during its second use, the bottom of the frame seat is provided with anti-slip grooves.

[0022] Compared with existing technologies, the advantages of this invention are as follows: The cot has a first usage state and a second usage state. In the first usage state, each support leg is deflected downward relative to the support rod and unfolds to serve as a support for contacting the ground, thus functioning as a raised bed. In the second usage state, each support leg is deflected upward relative to the support rod and retracts to a position higher than the bottom of the headstock, so that each headstock serves as a support for contacting the ground, thus functioning as a low bed. This structural design allows users to choose a suitable height according to their needs, meeting the needs of different users and improving the user's actual experience. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the cot of Embodiment 1 of this utility model;

[0024] Figure 2 This is a front view of the cot of Embodiment 1 of this utility model (in its first use state);

[0025] Figure 3 This is a three-dimensional structural diagram of the cot of Embodiment 1 of this utility model after the bed sheet is removed;

[0026] Figure 4 This is a three-dimensional structural diagram of the support rod assembly of the cot in Embodiment 1 of this utility model;

[0027] Figure 5 This is an exploded view of the support rod assembly of the cot in Embodiment 1 of this utility model;

[0028] Figure 6 for Figure 2 Sectional view at point AA;

[0029] Figure 7 for Figure 2 Sectional view at point BB;

[0030] Figure 8 This is a three-dimensional structural diagram of the locking wrench and its components according to Embodiment 1 of this utility model.

[0031] Figure 9 for Figure 8 An exploded view of the locking wrench and the components mounted thereon is shown in the figure.

[0032] Figure 10 This is a three-dimensional structural diagram of the support rod assembly of the cot in Embodiment 1 of this utility model (with the locking wrench in the position);

[0033] Figure 11 for Figure 2 Sectional view at CC;

[0034] Figure 12 This is a three-dimensional structural diagram of the headstock of Embodiment 1 of this utility model;

[0035] Figure 13 This is a front view of the headstock of Embodiment 1 of this utility model;

[0036] Figure 14 This is a three-dimensional structural diagram of the headstock of Embodiment 1 of this utility model from another angle;

[0037] Figure 15 This is a diagram showing the process of the locking lever of the cot in Embodiment 1 of this utility model being shifted from an extended state to a retracted state (the cot is in its second use state).

[0038] Figure 16 This is a three-dimensional structural diagram of the support rod assembly of the cot in Embodiment 2 of this utility model;

[0039] Figure 17 A three-dimensional structural diagram of the support rod assembly of the cot in Embodiment 2 of this utility model after omitting components such as the locking wrench;

[0040] Figure 18 This is a three-dimensional structural diagram of the locking wrench of the support rod assembly of the cot in Embodiment 2 of this utility model. Detailed Implementation

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0042] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0043] Example 1

[0044] Figures 1-15 A preferred embodiment of the cot of this utility model is shown. The cot includes a bed sheet 5, first side rods 51 and second side rods 52 disposed on the left and right sides of the bed sheet 5, and a support rod device disposed at the bottom of the bed sheet 5 and connected between the first side rods 51 and the second side rods 52. The first side rods 51 and the second side rods 52 are parallel, and the left and right sides of the bed sheet 5 are designed with openings for the first side rods 51 and the second side rods 52 to pass through. The support rod device includes at least two sets of support rod assemblies 1 arranged at intervals along the length L of the bed sheet 5, such as... Figure 1 Three support rod assemblies 1 are shown, each of which extends along the width direction W of the bed fabric 5.

[0045] See Figure 3 The support rod assembly 1 includes a support rod, support feet, two frame heads located at both ends of the support rod along its length, and a first support rod 171 and a second support rod 172 respectively located on the two frame heads. Each frame head is also provided with two support feet.

[0046] See Figure 4 and Figure 5 The support rod includes a first support rod 11 and a second support rod 14, wherein the first end of the first support rod 11 is sleeved together with the first end of the second support rod 14, allowing it to move along the length direction L1 of the first support rod 11. Figure 5As shown, the second support rod 14 is designed as a hollow tubular structure at least in the portion adjacent to its first end, with a socket 140 at its first end into which the first end of the first support rod 11 is inserted. In a preferred embodiment, to reduce the weight of the cot and save material costs, both the first support rod 11 and the second support rod 14 are hollow tubular structures. The cross-sections of both the first support rod 11 and the second support rod 14 are elliptical. The cross-sectional dimension 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-sectional dimension 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 mating manner without significant wobbling.

[0047] The support rod assembly 1 includes a first headstock 61 located at the second end of the first support rod 11 (i.e., the end furthest from the second support rod 14) and a second headstock 62 located at the second end of the second support rod 14. The first headstock 61 and the second headstock 62 have identical structures. The first headstock 61 is rotatably connected to two support legs and a first strut 171, and the two support legs on the first headstock 61 are designated as first support leg 161 and second support leg 162, respectively. The second headstock 62 is rotatably connected to two support legs and a second strut 172, and the two support legs on the second headstock 62 are designated as third support leg 163 and fourth support leg 164, respectively. Specifically, the bottom of the first headstock 61 has an upwardly recessed second receiving groove 66 extending parallel to the length direction of the support rod. One end of the first support rod 171 is rotatably connected to two opposite side walls of the second receiving groove 66 via a pin 91. When deflected upward to its limit position, the first support rod 171 tilts from bottom to top toward the side away from the second headstock 62. The other end of the first support rod 171 is connected to the first side rod 51. Specifically, the other end of the first support rod 171 has a first retaining opening 1710 with an outward opening (i.e., the opening is away from the side where the second headstock 62 is located). The first side rod 51 can be inserted into the first retaining opening 1710. The limit position of the upward deflection of the first support rod 171 can be limited by the corresponding port edge of the second receiving groove 66. At the same time, the second receiving groove 66 also limits the deflection direction of the first support rod 171 throughout the entire deflection process to be basically within a plane, preventing left and right swaying and ensuring the reliability of the support of the first support rod 171. When the first support rod 171 is deflected downward to its extreme position, it is stored in the second storage groove 66 of the first headstock 61. Similarly, the bottom of the second headstock 62 also has an upwardly recessed second storage groove 66 that extends parallel to the length direction of the support rod. One end of the second support rod 172 is rotatably connected to the two opposite side walls of the second storage groove 66 by a pin 92. When it is deflected upward to its extreme position, the second support rod 172 tilts from bottom to top toward the side away from the first headstock 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 has a second retaining opening 1720 with the opening facing outward (that is, the opening is away from the side where the first headstock 61 is located). The second side rod 52 is inserted into the second retaining opening 1720. The extreme position of the upward deflection of the second support rod 172 can be limited by the corresponding port edge of the second storage groove 66. Simultaneously, the second storage groove 66 also ensures that the deflection direction of the second support rod 172 throughout its entire deflection process remains essentially within a single plane, preventing lateral swaying and guaranteeing the reliability of the second support rod 172's support. When the second support rod 172 deflects downward to its extreme position, it is stored within the second storage groove 66 of the second headstock 62.

[0048] SeeFigures 12-14The first headstock 61 and the second headstock 62 have the same structure. The connection and cooperation structure between the first headstock 61 and the first support leg 161, the second support leg 162, the first support rod 171 and other components is also the same as the connection and cooperation structure between the second headstock 62 and the third support leg, the fourth support leg, the second support rod 172 and other components. The following description takes the first headstock 61 as an example: The two support legs (that is, the first support leg 161 and the second support leg 162) are rotatably mounted on the two opposite side walls of the first headstock 61. Specifically, the first headstock 61 has a first shaft hole 64 extending from its front sidewall to its rear sidewall. A freely rotatable pivot pin 71 passes through this first shaft hole 64. The two ends of the pivot pin 71 protrude from the front and rear sidewalls of the first headstock 61 and are correspondingly inserted into the second shaft holes 1601 of the front and rear support legs. Both the front and rear support legs are connected to the pivot pin 71 by positioning pins 72 that radially pass through the second shaft holes 1601. Thus, the two support legs can rotate synchronously, meaning that when one support leg rotates, the other support leg also rotates synchronously. More specifically, the areas of the front and rear sidewalls of the first headstock 61 adjacent to the pivot pin 71 are constructed with guide slopes 63 that allow the support legs to gradually deviate from the vertical direction during the deflection and unfolding process relative to the support rod. After the support legs deflect and unfold to a set position, the support legs form a certain tilt angle with the vertical direction. In this way, during the corresponding deflection and unfolding process, the front and rear support legs can be guided by the guide slopes 63 to automatically open into a figure-eight shape. The V-shaped arrangement of the support legs makes the bed more stable and reliable. When the support legs are fully deflected and extended, the angle of inclination formed by the extension direction of the support legs relative to the vertical direction is generally about 20°. On the other hand, the front and rear side walls of the first headrest 61 are also provided with a first limiting stop 691 for limiting the downward deflection of the corresponding support leg to the extreme angle position and a second limiting stop 692 for limiting the upward retraction of the corresponding support leg to the extreme angle position. Specifically, the first limiting stop 691 and the second limiting stop can be a stepped part formed by the change in the front and rear thickness of the first headrest. When the support leg is deflected and extended to the extreme angle position, the support leg tilts from top to bottom away from the second headrest 62, thereby ensuring reliable support when the cot is subjected to gravity pressure during use. When the support leg is deflected and extended to the extreme angle position, the extension direction of the support leg is basically parallel to the extension direction of the support rod. More specifically, when the front and rear support legs of the first headstock 61 and the first support rod 171 are all retracted, the first support rod 171 is located between the front and rear support legs, that is, the three are retracted side by side at the bottom of the support rod.The second shaft hole 1601 on the front and rear support feet is designed as an movable hole that allows the support feet to deflect relative to the pivot pin 71 around the positioning pin 72. It can generally be designed as a strip hole, an elliptical hole or a tapered hole structure with the extension direction basically perpendicular to the positioning pin 72, so as to avoid interference caused by the second shaft hole 1601 on the support feet during the tilting and deflection opening process of the support feet.

[0049] To ensure the support leg remains stably in its downward-deflected position, the first headframe is equipped with a second elastic buckle 33 that is exposed relative to the side wall of the headframe and can elastically extend and retract. A second slot 160 is formed on the side wall of the first end of the support leg at a position corresponding to the second elastic buckle 33. When the support leg deflects downward to its extreme position (i.e., when it abuts against the first limiting stop 691 of the first headframe 61), the second elastic buckle 33 engages in the second slot 160 to prevent the support leg from deflecting back and to ensure the reliability of the support leg's support.

[0050] See Figure 11 In some embodiments, the second elastic buckle 33 includes an overall arc-shaped or V-shaped spring piece, two buckle portions 332 disposed on the spring piece, and operating portions 333 disposed at both ends of the spring piece. The two buckle portions 332 are symmetrically disposed on opposite sides of the spring piece and both protrude outwards, with the top endpoints of the two buckle portions 332 designed as outwardly convex arc surfaces. The two operating portions 333 can be plastic components attached to the two ends of the spring piece, and their volume can be designed to be relatively large. Anti-slip textures can be provided on the two operating portions. The two opposite sidewalls of the first headstock 61 are also provided with second through holes 65 that extend to the second receiving groove 66, and the inner wall of the second receiving groove 66 of the first headstock 61 is also provided with a second positioning groove 660 that matches the shape of the spring piece body. When the second elastic buckle 33 is installed, the spring piece body is disposed in the second positioning groove 660, and the two buckle portions 332 are exposed on the front and rear sidewalls of the first headstock 61 through the two second through holes 65 respectively. The bottom of the opposite sidewall of the first headrest 61 also has an operating opening 67 that is recessed upward and extends laterally into the second storage groove 66. The two operating parts 333 of the second elastic protrusion 33 are located at the two operating openings 67, wherein the bottom of the second elastic protrusion 33 is higher than the bottom of the first headrest 61. The operating openings 67 on the opposite sidewall of the headrest also make it convenient for the user to directly press the operating parts 333 on the side to release the second elastic protrusion 33 from locking the support leg, allowing the support leg to quickly deflect and retract.

[0051] In this embodiment, the support legs on each headstock are rotatably connected to the headstock, and the cot has at least a first usage state and a second usage state as the position of each support leg relative to the headstock changes: In the first usage state, each support leg is deflected downward relative to the support rod and unfolds to serve as a support for contacting the ground, thereby being used as a raised bed, see details. Figure 2 In the second usage state, each support leg deflects upward relative to the support rod and retracts, moving to a position higher than the bottom of the headstock, so that each headstock serves as a support for contacting the ground, thus allowing it to be used as a low bed. See details. Figure 15 This type of cot design allows users to choose the appropriate height as needed, meeting the needs of different users and improving the actual user experience.

[0052] Generally speaking, the height of a cot in its primary use as a high bed can be designed to be around 396mm, while the height of a cot in its secondary use as a low bed can be designed to be around 205mm.

[0053] The front and rear support legs of each headrest are symmetrically arranged about the headrest. In the first use state, the ends of the two support legs away from the headrest are arranged in a V-shape, making the bed more stable and reliable. In the second use state, the ends of the two support legs away from the headrest are arranged side by side, making the support legs more compact when folded, smaller in size, and occupying less space.

[0054] To ensure the stability of the cot when used as a low bed, the bottom surface of each frame is generally designed as a flat wall structure, on which anti-slip grooves 68 may be provided. See details. Figure 14 .

[0055] See Figure 5 The first end of the first support rod 11 and the first end of the second support rod 14 of the support rod assembly 1 can be separated, that is, the two can be disassembled for storage. The first support rod 11 and the second support rod 14 are also connected by an elastic rope 80 provided in the inner hole of the two, so that the user can easily identify and match them during assembly.

[0056] The first support rod 11 is also provided with a fixed seat 13 and a first limiting block 12. The first limiting block 12 is closer to the second support rod 14 and is located near the first end of the first support rod 11. The first limiting block 12 can move along the length direction L1 of the first support rod 11. In some embodiments, the first limiting block 12 can be a sliding sleeve sleeved on the first support rod 11. The first end of the second support rod 14 is provided with a second limiting block 141. The second limiting block 141 is a fixed sleeve sleeved on 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 insertion port 140 of the second support rod 14, the sliding sleeve on the first support rod 11 can form a limiting engagement with the fixed sleeve on the second support rod 14 in the length direction of the first support rod 11. A locking wrench 2, capable of unfolding and retracting relative to the first support rod 11, is rotatably connected to the first limiting block 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 fixed 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 fixed seat 13 via a pin 94, and the second end of the connecting rod 4 is rotatably connected to the locking wrench 2. Both the pin 94 rotatably connecting the connecting rod 4 to the fixed seat 13 and the pin 93 rotatably connecting the connecting rod 4 to the locking wrench 2 extend in the forward and backward direction.

[0057] Figure 15 The diagram illustrates the process by which the locking lever 2 of the support rod assembly of the cot deflects from the unfolded state to the retracted state. Figure 15 Figure a shows the state where the first end of the first support rod 11 is just inserted into the insertion port 140 of the first end of the second support rod 14. At this time, the locking wrench 2 is in the unfolded state, and the distance m1 between the first limiting block 12 and the fixing seat 13 is relatively small. The first limiting block 12 and the second limiting block 141 of the second support rod 14 have not yet abutted. After the first support rod 11 and the second support rod 14 are fully inserted, the first limiting block 12 can abut against the second limiting 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 cot's fabric. It can be understood that the cot's fabric is not yet taut in this state and is in a relatively loose state. Figure 15Figure b shows the state of the locking wrench 2 as it gradually deflects and retracts relative to the first support rod 11 to a certain angle (the locking wrench is not fully retracted). During this process, the first limiting stop 12 moves away from the fixed seat 13. At the same time, the second limiting block 141 of the second support rod 14, pressed by the first limiting block 12, also moves away from the fixed seat 13, that is, it disengages outward relative to the first support rod 11. The solid arrow in Figure b shows the direction of the outward movement of the second support rod 14. At this time, the distance m2 between the first limiting block 12 and the fixed seat 13 is greater than m1. The length of the entire support rod assembly is slightly smaller than the size of the bed sheet of the cot. It can be understood that in this state, the bed sheet of the cot is in a state of being about to be tightened, but not yet fully tightened. Figure 15 Figure c shows the state where the locking wrench 2 is fully retracted relative to the first support rod 11. During the operation from Figures b to c, the first limiting stop 12 is driven by the locking wrench 2 to continue moving away from the fixed seat 13, and the second limiting stop 141 of the second support rod 14, pressed by the first limiting stop 12, also continues to move away from the fixed seat 13, thereby fully tightening the bed sheet. When the locking wrench 2 is in the retracted state, the distance m3 between the first limiting stop 12 and the fixed seat 13 is greater than m2. Due to the lever principle, the process of tightening the bed sheet 5 by retracting the locking wrench 2 relative to the first support rod 11 is relatively effortless, facilitating the installation of the support rod assembly 1 of the cot. Furthermore, since the connecting rod 4 is also basically in a retracted state relative to the first support rod 11 after the locking wrench 2 is retracted relative to the first support rod 11, that is, the extension direction of the connecting rod 4 is basically the same as that of the locking wrench 2 and the length direction of the first support rod 11. Therefore, the locking wrench 2 is in a locked state at this time, which is not easy to loosen and the locking is more secure.

[0058] To reduce the friction between the first limiting block 12 and the first support rod 11, and to make the sliding process of the first limiting block 12 relative to the first support rod 11 smoother, at least two outwardly protruding guide ribs 120 are distributed circumferentially on the inner peripheral wall of the sliding sleeve, extending along the length direction of the first support rod 11. Figure 6 Eight guide ribs 120 are shown. The fixing base 13 may be a plastic piece wrapped around the outside of the body of the first support rod 11.

[0059] To further ensure the reliability of the locking wrench 2 in the retracted state relative to the fixed base 13, the locking wrench 2 and the fixed base 13 are locked by a locking assembly when the locking wrench 2 is in the retracted state. In this embodiment, the side of the locking wrench 2 facing the fixed base 13 is provided with a first receiving groove 20 for the side of the fixed base 13 to be received therein. The locking assembly includes a first elastic protrusion 31 and a first pressing button 25, wherein the first elastic protrusion 31 is provided on the fixed base 13. Specifically, the interior of the fixed base 13 defines a mounting chamber 130, and the front and rear side walls of the fixed base 13 are each provided with a first through hole 131 that extends into the mounting chamber 130. There are two first elastic protrusions 31, which are respectively provided at the two first through holes 131. Figure 7 As shown, the first elastic buckle 31 includes a first protrusion and a limiting flange extending radially outward from the outer wall of the inner end of the first protrusion. The outer end of the first protrusion is designed as an outwardly convex arc surface structure. When the first elastic buckle 31 is installed, the first protrusion is movably limited in the first through hole 131 of the fixing base 13, and the outer end can be exposed relative to the front and rear side walls of the fixing base 13. The limiting flange of the first protrusion is correspondingly limited to the inner side of the periphery of the first through hole 131 to prevent the first elastic protrusion from falling outward through the first through hole 131. A first elastic element 32 is also provided between the two first elastic buckles 31 to make the two first elastic buckles 31 tend to move away from each other. The first elastic element 32 can be a spring. The inner ends of the two first elastic buckles 31 are respectively provided with spring positioning holes, and the two ends of the spring are respectively limited in the spring positioning holes of the two first elastic buckles 31.

[0060] See Figure 7 The locking wrench 2 has two opposite side walls of its first receiving groove 20, each with a first retaining groove 21 into which the outer end of the first elastic protrusion 31 can be engaged. A first pressing button 25 is located on the outer wall of the locking wrench 2 at a position corresponding to the first retaining 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. The push rod 252 can pass through the outer wall of the locking wrench 2 into the first retaining groove 21 and can move axially. The inner end of the push rod 252 also has a second limiting stop that protrudes radially outward, preventing the push rod 252 from disengaging from the locking wrench 2. After the locking wrench 2 is deflected and retracted relative to the fixed base 13, the first elastic protrusion 31 on the fixed base 13 can automatically engage with the first slot 21 of the locking wrench 2. When it is necessary to unlock the locking wrench 2, the user presses the first button 25, which drives the first protrusion of the first elastic protrusion 31 to retract and disengage from the first slot 21, and then the locking wrench 2 can be pulled down. In other optional embodiments, the first elastic element 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 deformation elastic restoring capability.

[0061] On the two opposite side walls of the first storage groove 20 of the locking wrench 2, a first guide slope 201 is provided near the opening of the first storage groove 20. The second guide slope 202 is located on the outside of the first slot 21 and can be used to guide the first elastic protrusion 31 of the fixing seat 13 to smoothly enter the first storage groove 20 and be correspondingly locked into the first slot 21 of the locking wrench 2.

[0062] 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, meaning the width of the cot is fixed and cannot be adjusted. To achieve adjustable support rod length, in a preferred embodiment, the connecting rod 4 is a flat strip 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 pressing lock rod assemblies symmetrically arranged on the left and right sides of the connecting seat 42. For ease of assembly, the connecting seat 42 includes two sub-seats 421, which are symmetrically arranged on the front and rear sides of the connecting rod 4. Specifically, the sub-seats 421 are generally disc-shaped, and the two opposite sides of the two sub-seats 421 have relatively extending second protrusions 4213. During assembly, the second protrusions 4213 of the two sub-seats 421 are inserted into the shaft holes at the second end of the connecting rod 4, thus serving as a pin structure for the connecting rod 4 to rotate relative to the connecting seat 42. Each of the two separate base bodies 421 has a recessed first positioning groove 4211 on its two far apart sides. The bottom wall of the first positioning groove 4211 also has an outwardly extending positioning post 4212. The inner wall of the first receiving groove 20 of the locking wrench 2 has at least two second locking holes 241 spaced apart along the length of the locking wrench 2, and a second sliding groove 242 connecting each of the second locking holes 241. Each second locking hole 241 and second sliding groove 242 extends from the outer wall of the locking wrench 2 into the first receiving groove 20. The second sliding groove 242 is essentially a straight groove and is located on the same side of a row of locking holes formed by the aforementioned second locking holes 241. The junction between each second locking hole 241 and the second sliding groove 242 is a constriction 243.

[0063] See Figure 8 and Figure 9 Each push-locking lever assembly includes a locking lever 43, a second elastic element 44, and a second push button 45.

[0064] The locking lever 43 includes a large lever portion 431 and a small lever portion 432 arranged sequentially along the axial direction. The large lever portion 431 is farther away from the second button 45, while the small lever portion 432 is closer to the second button 45. The end of the small lever portion 432 is connected to the middle of the second button 45. The outer diameter of the large lever portion 431 of the locking lever 43 is smaller than the inner diameter of the second lock hole 241, but larger than the width of the constriction 243. This allows the large lever portion 431 to be engaged in the second lock hole 241, but not to slide into the second groove 242 through the constriction 243. The outer diameter of the small lever portion 432 of the locking lever 43 is smaller than the width of the constriction 243. This allows the small lever portion 432 to slide between the second groove 242 and the corresponding second lock hole 241 through the constriction 243. The outer peripheral wall of the main rod portion 431 of the locking rod 43 also has 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 it can abut against the inner side of the periphery of the second locking hole 241 to form a limiting, so that the locking rod 43 cannot be dislodged outward through the second locking hole 241. The second elastic element 44 is preferably a compression spring, which abuts against the locking rod 43 and the connecting seat 42. Specifically, the inner end of the locking rod 43 has a guide channel 434 that is adapted to the positioning post 4212 of the sub-seat body 421 along the axial direction. 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 main 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 button 45 located outside the locking wrench 2. When it is necessary to adjust the width of the cot (i.e., the length of the support rod), the locking wrench 2 is opened and the second button 45 is pressed inward, so that the large rod part 431 of the locking rod 43 disengages from the second locking hole 241 and slides into the second sliding groove 242. After moving along the second sliding groove 242 and engaging with the corresponding second locking hole 241, the second button 45 is released. Under the elastic force of the second elastic element 44, the large rod part 431 of the second button 45 can automatically engage with the second locking hole 241, preventing it from disengaging and returning to the second sliding groove 242. Then, the locking wrench 2 is closed relative to the fixed seat 13, thus completing the width adjustment of the cot. Since the second button 45 of the pressing locking lever assembly is exposed on the outer wall of the locking wrench 2, it is convenient for the user to press it directly, making the unlocking and locking operations more convenient and the width adjustment process of the cot more efficient.

[0065] like Figure 15As shown in the figure, the second locking hole 241 on the locking wrench 2 in this embodiment has three sets of holes spaced apart along the length direction of the locking wrench 2. Thus, the width of the cot can be adjusted in three levels: the first level is the shortest cot distance, which can be 1200mm; the second level is the middle cot distance, which can be 1230mm; and the third level is the longest cot distance, which can be 1260mm.

[0066] Example 2

[0067] Figures 16-18 Another preferred embodiment of the cot of this utility model is shown. The difference between this embodiment and Embodiment 1 lies in the location of the locking hole on the locking wrench 2 and the rotatable connection structure with the second end of the connecting rod 4. The locking assembly between the locking wrench 2 and the fixed base 13 is also different, as detailed below:

[0068] 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 by a corresponding plastic part. At least two first locking holes 231 and first sliding grooves 232 communicating with each first locking hole 231 are provided on the two opposite side walls of the first receiving groove 20 of the locking wrench 2, wherein neither the first locking hole 231 nor the first sliding groove 232 penetrates the side wall 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 telescopic shaft structure) can be engaged and rotatably limited in the first locking holes 231 on the two opposite side walls of the first receiving groove 20. When adjusting the width of the cot (i.e., the length of the support rod), the locking wrench 2 is pulled down to extend it, 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 another first locking hole 231. The locking wrench 2 is then retracted relative to the fixed base 13, thus completing the width adjustment of the cot. The first sliding groove 232 of the first locking hole 231 is located on the inner side wall of the first storage groove 20 of the locking wrench 2, which avoids the user's hand being pinched, making it safer and more reliable.

[0069] The locking wrench 2 has two third limiting stops 22 on its opposite side walls of the first storage groove 20. The two third limiting stops 22 are protruding block structures extending towards each other. The two opposite side walls of the fixing seat 13 have outwardly protruding limiting ribs 132 that can form a limiting engagement with the third limiting stops 22. The aforementioned limiting stops and limiting ribs 132 together constitute the locking assembly between the locking wrench 2 and the fixing seat 13. The two opposite side walls of the first storage groove 20 of the locking wrench 2 also have a second guide slope 202 near the opening of the first storage groove 20. The second guide slope 202 is located outside the third limiting stops 22 and can be used to guide the limiting ribs 132 of the fixing seat 13 to pass over the third limiting stops 22 and smoothly enter the first storage groove 20, forming a limiting engagement with the third limiting stops 22 to prevent the locking wrench 2 from falling off the fixing seat 13.

Claims

1. A camp bed comprising: a bed cloth (5); a first side rod (51) and a second side rod (52) arranged side by side and provided on left and right sides of the bed cloth (5) respectively; a support rod assembly provided at a bottom of the bed cloth (5), the support rod assembly (1) extending along a width direction (W) of the bed cloth (5) and connected between the first side rod (51) and the second side rod (52), the support rod assembly (1) comprising a support rod (10) and a frame head seat provided at two ends of the support rod (10) in a length direction (L1) of the support rod (10), and further comprising support feet provided on the frame head seat; characterized in that the support feet on the frame head seat are pivotally connected to the frame head seat and make the camp bed have at least a first use state and a second use state with the change of the pivot position of each support foot relative to the frame head seat: in the first use state, each support foot is deflected downward relative to the support rod (10) to serve as a support part for contacting the ground; in the second use state, each support foot is deflected upward relative to the support rod (10) to be shifted to a position higher than the bottom of the frame head seat, so that each frame head seat serves as a support part for contacting the ground.

2. The camp bed according to claim 1, characterised in that: Each frame head seat is connected with two support feet, and the two support feet are symmetrically arranged about the frame head seat, in the first use state, the two support feet are away from each other at one end away from the frame head seat to form a splayed arrangement, and in the second use state, the two support feet are close to each other at one end away from the frame head seat to form a side-by-side arrangement.

3. The camp bed according to claim 1, wherein: The first end of the two support feet is connected to the frame head seat through a pivot pin (71), and the side wall of the frame head seat adjacent to the pivot pin (71) is configured as a guide slope (63) that can make the support feet gradually deviate from the vertical direction during the deflection and expansion relative to the support rod (10).

4. The camp bed according to claim 3, wherein: The first end of the two support feet is pivotally connected to the frame head seat through the same pivot pin (71).

5. The camp bed according to claim 4, wherein: The frame head seat is provided with a first shaft hole (64) penetrating through the opposite two side walls thereof, the pivot pin (71) is arranged in the first shaft hole (64) and the two ends thereof are exposed, and the first end of the two support feet is connected to the two ends of the pivot pin (71) through a positioning pin (72), so that the two support feet can be synchronously pivoted about the pivot pin (71).

6. The camp bed according to claim 5, wherein: The first end of the two support feet is provided with a second shaft hole (1601) for the end of the pivot pin (71) to be arranged therein, and the second shaft hole (1601) is configured as a movable hole for the support feet to be deflected about the positioning pin (72).

7. The camp bed according to any one of claims 1 to 6, wherein: The frame head seat is further provided with a second elastic protruding buckle (33) that can be exposed relative to the side wall of the frame head seat and elastically stretchable, and the side wall of the first end of the support feet is provided with a second clamping groove (160) at a position corresponding to the second elastic protruding buckle (33), and in the first use state of the support feet, the second elastic protruding buckle (33) is clamped into the second clamping groove (160).

8. The camp bed according to claim 7, characterised in that: The second elastic protruding buckle (33) comprises an arc-shaped or V-shaped elastic sheet, two protruding buckle portions (332) arranged on the elastic sheet, and two operation portions (333) arranged at two ends of the elastic sheet. The bottom of the frame head base is provided with a second receiving groove (66) which is concave upward and extends along the length direction of the support rod (10). Two second through holes (65) which penetrate the second receiving groove (66) are arranged on the two opposite side walls of the frame head base. The second elastic protruding buckle (33) is arranged in the second receiving groove (66). The two protruding buckle portions (332) of the second elastic protruding buckle (33) are exposed through the two second through holes (65) respectively. The bottom of the opposite side walls of the frame head base is further provided with operation openings (67) which are concave upward and laterally penetrate the second receiving groove (66). The two operation portions (333) of the second elastic protruding buckle (33) are arranged at the two operation openings (67).

9. The camp bed according to any one of claims 1 to 6, wherein: The two frame head bases of the support rod assembly (1) are further provided with a first support rod (171) and a second support rod (172) which extend upwardly and obliquely. The ends of the first support rod (171) and the second support rod (172) are rotatably connected to the corresponding frame head bases. The first support rod (171) and the second support rod (172) are both in an unfolded state in which they unfold upwardly relative to the support rod (10), and are in a folded state in which they are folded relative to the support rod (10). The bottom of the frame head base is provided with a second receiving groove (66) which is concave upward and extends along the length direction of the support rod (10). When the first support rod (171) or the second support rod (172) is in the folded state, it is received in the second receiving groove (66) of the corresponding frame head base.

10. The camp bed according to any one of claims 1 to 6, wherein: The bottom of the frame head base is provided with an anti-skid groove (68).

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