Bed

Abstract

A bed, comprising a support frame (10), a cloth cover (20) and a cloth cover connecting bracket (30), wherein the cloth cover connecting bracket (30) is connected to the top of the support frame (10); the cloth cover connecting bracket (30) is a quadrilateral frame, which is enclosed by two first connecting rods (31) and two second connecting rods (32); the edges of four sides of the cloth cover (20) are respectively connected to the first connecting rods (31) and the second connecting rods (32), so as to form a bed surface; and at least one of the second connecting rods (32) is provided with a connector, the connector being provided with an adjustment device for driving the second connecting rod (32) to move, such that the distance between the two first connecting rods (31) is increased or reduced by means of the adjustment device. The adjustment device is additionally arranged on the bed, such that the cloth cover connecting bracket (30) can be connected when the cloth cover (20) is in a loosened state, and finally, the cloth cover (20) is tensioned by means of the adjustment device, thereby greatly reducing the difficulty of mounting the cloth cover (20); and when the cloth cover (20) on the bed surface is loosened, the second connecting rod (32) is driven to move by means of the adjustment device, such that the distance between the two first connecting rods (31) is increased, and thus the cloth cover (20) is tensioned.

Description

A bed Technical Field

[0001] The present invention relates to the technical field of household appliances, and more particularly to a bed. Background Art

[0002] A bed provides a comfortable resting place for people or pets, especially in harsh outdoor environments. Currently, a common pet bed (such as the Chinese utility model patent with authorization publication number CN 215422216U) discloses an aluminum pet bed that is easy to clean and replace. The bed comprises a support base with a non-slip pad disposed on the outer bottom side of the support base; a connecting device fixedly connected to the outer top side of the support base, with a bed surface disposed on the inner side of the connecting device. A longitudinal connecting rod is connected to the inner surface of the connecting device, and a transverse connecting rod is disposed perpendicular to the longitudinal connecting rod. A snap-on seat is disposed on the side of the transverse connecting rod near the bed surface.

[0003] To provide better support, the bed surface is typically made of fabric with a low stretch factor (such as Oxford fabric). However, during assembly of such pet beds, the first three connecting rods (two transverse connecting rods and one longitudinal connecting rod, or one transverse connecting rod and two longitudinal connecting rods) and the last longitudinal connecting rod (or transverse connecting rod) require considerable force to move into the correct position due to the constraints of the fabric cover, making installation difficult. Furthermore, under the weight of pets (especially those with large weights) for extended periods, the fabric cover (primarily in the width direction) can undergo irreversible stretching, causing the bed surface to sag and reduce its support. Without repair to restore the tautness of the bed surface, it becomes difficult to provide stable support for people or pets, making it difficult for them to rest soundly. Furthermore, this sag worsens over time, leading to collapse and significantly shortening the bed surface's lifespan. This necessitates replacing the bed surface, which is both cumbersome and costly. For some pet beds whose surfaces cannot be disassembled or replaced, the entire bed becomes scrapped.

[0004] Patent application CN 102106265A, however, discloses a cat playhouse, comprising a frame and a cover that fits over the frame. The frame comprises at least three parallel support rods, two fixing brackets connected to the ends of the support rods, and a plurality of support plates positioned between the two fixing brackets and connected to the support rods. At least one of the support plates has a through hole. A height-adjustable mechanism is provided on the corresponding support bars below the top fixing brackets. The mechanism comprises a threaded connector that fits over the support bars and a height-adjustable nut that mates with the threads on the connector. The top of the nut is connected to the top fixing bracket via another support bar. While this patent discloses an adjustment mechanism, it is intended for use in a cat playhouse, specifically for adjusting the height of the support bars to facilitate the cover's fit over the frame, thereby ensuring a more secure fit. This differs from the present invention in terms of both application and purpose. Summary of the Invention

[0005] The present invention provides a bed to solve the shortcomings of existing beds, such as difficulty in installation, reduced supporting force when the bed surface becomes loose, difficulty for people or pets to rest soundly, and greatly shortened service life.

[0006] The present invention adopts the following technical solutions:

[0007] A bed comprises a support frame, a cloth cover and a cloth cover connecting bracket, wherein the cloth cover connecting bracket is connected to the top or upper middle part of the support frame, and the cloth cover connecting bracket is a quadrilateral frame formed by two first connecting rods and two second connecting rods connected in sequence, and the four side edges of the cloth cover are respectively connected to the first connecting rods and the second connecting rods to form a bed surface, and at least one of the second connecting rods is provided with a connecting piece, and the connecting piece is provided with an adjusting device for driving the second connecting rod to move, and the distance between the two first connecting rods is increased or decreased by the adjusting device.

[0008] Two first connecting rods and two second connecting rods are sequentially connected to form a rectangular frame. A first connecting sleeve is installed at the end of each second connecting rod, and both ends of the first connecting rod are respectively connected to the side surfaces of the first connecting sleeve.

[0009] One of the first connecting sleeves of each first connecting rod is respectively provided with an adjusting device.

[0010] The adjusting device is a rotating screw with an external thread. The inner wall of the first connecting sleeve is provided with an internal thread. The rotating screw is spirally connected to the internal thread from the outside of the first connecting sleeve. The end of the rotating screw is fixedly connected or in contact with the end of the second connecting rod.

[0011] The rotating screw includes a screw portion with a hollow structure inside and a head fixedly connected to the screw portion. The end of the second connecting rod extends into the hollow structure and is supported on the inner wall of the end where the head is connected to the screw portion.

[0012] The first connecting sleeve is also provided with a stop mechanism for limiting the rotation of the adjusting device.

[0013] The anti-retraction mechanism includes a flip cover, a push rod and a movable block, wherein the flip cover can be connected to the head of the rotating screw in an upside-down manner, a push rod is provided at the lower part of the flip cover, and a movable block is provided at the front end where the screw part of the rotating screw is connected to the head; a plurality of protrusions are installed at the through hole where the first connecting sleeve is matched with the rotating screw.

[0014] The adjusting device is a linear ratchet mechanism, which includes a mounting seat, a handle, a movable sleeve, a first pawl and a second pawl. A rectangular groove is provided on the top surface of the first connecting sleeve to form the mounting seat. The end of the second connecting rod is sleeved in the movable sleeve. A plurality of ratchets are provided on the top surface of the movable sleeve. The movable sleeve is inserted into the mounting seat, and the ratchets are correspondingly located in the rectangular groove. The handle is rotatably connected to the mounting seat through a rotating shaft. The front and rear sides of the handle centered on the rotating shaft are respectively hinged with the first pawl and the second pawl. The length of the second pawl is greater than that of the first pawl. The first pawl advances along the ratchet as the handle swings, and the second pawl forms a stop.

[0015] A handle locking mechanism is also installed on the mounting seat, and the handle locking mechanism includes a hanging rod and a locking buckle. The hanging rod is fixed on the side wall of the handle, and the locking buckle is installed on the side wall of the mounting seat. When the handle is placed flat on the top surface of the mounting seat, the locking buckle is hung on the hanging rod.

[0016] A second connecting sleeve is fixedly provided on the side of the first connecting sleeve, and the first connecting rod is fixed in the second connecting sleeve; a third connecting sleeve is also fixed to the bottom of the first connecting sleeve, and the support frame includes four supporting legs, and the upper end of each supporting leg is sleeved in the third connecting sleeve; the first connecting sleeve, the second connecting sleeve and the third connecting sleeve are perpendicular to each other in three-dimensional space.

[0017] The present invention can also adopt the following scheme:

[0018] A bed comprises a support frame, a cloth cover and a cloth cover connecting bracket, wherein the cloth cover connecting bracket is connected to the top or upper middle part of the support frame, and the cloth cover connecting bracket is formed by two first connecting rods and two second connecting rods connected in sequence to form a quadrilateral frame, and the four side edges of the cloth cover are respectively connected to the first connecting rods and the second connecting rods to form a bed surface, and at least one of the second connecting rods is composed of two or more short tubes, and at least two adjacent short tubes are connected by an adjusting device, and the corresponding short tubes are driven by the adjusting device to move relative to each other so that the distance between the two first connecting rods is increased or decreased.

[0019] The two second connecting rods are each composed of two short tubes. In the two short tubes of each second connecting rod, the facing ends are connected by the adjusting device, and the other ends facing away are fixedly connected to the first connecting rod through a connecting pipe.

[0020] An inner thread segment is provided on the inner wall of each short tube, and the thread directions of two adjacent short tubes are opposite; the adjusting device is a rotating rod, and both ends of the rotating rod are provided with external thread segments corresponding to the inner thread segments of the two adjacent short tubes.

[0021] The adjusting device is a rotating rod with an external thread section, which is fixedly connected to or integrally formed with one of the short rods, and an internal thread section corresponding to the external thread section of the rotating rod is provided on the inner wall of the other short rod.

[0022] A stop mechanism for limiting the rotation of the adjusting device is also provided on the outer wall of the short tube.

[0023] The adjusting device includes a mounting seat, a handle, a movable sleeve, a first pawl and a second pawl. One end of the mounting seat is fixed to the end of one of the short tubes, and the end of the other short tube is fixedly sleeved in the movable sleeve. The top surface of the movable sleeve is provided with a plurality of ratchets, and a rectangular groove is opened on the top surface of the mounting seat. The movable sleeve is passed through the mounting seat, and the ratchets are correspondingly located in the rectangular groove. The handle is rotatably connected to the mounting seat through a rotating shaft. The front and rear sides of the handle centered on the rotating shaft are respectively hinged with the first pawl and the second pawl. The length of the second pawl is greater than that of the first pawl. The first pawl advances along the ratchet as the handle swings, and the second pawl forms a stop.

[0024] A handle locking mechanism is also installed on the mounting seat, and the handle locking mechanism includes a hanging rod and a locking buckle. The hanging rod is fixed on the side wall of the handle, and the locking buckle is installed on the side wall of the mounting seat. When the handle is placed flat on the top surface of the mounting seat, the locking buckle is hung on the hanging rod.

[0025] The present invention can also adopt the following scheme:

[0026] A bed comprises a support frame, a cloth cover and a cloth cover connecting bracket, the cloth cover connecting bracket is connected to the top or upper middle part of the support frame, the cloth cover connecting bracket comprises two first connecting rods, the cloth cover is connected to the two first connecting rods to form a bed surface, the support frame comprises at least two groups of support rods spaced apart at the bottom of the first connecting rod, the support rods comprise two support rods and a second connecting rod, the lower ends of the two support rods are connected to the two ends of the second connecting rod, the upper end of each support rod is fixedly connected to the first connecting rod, at least one second connecting rod is composed of two or more short tubes, and at least two adjacent short tubes are connected by an adjusting device, and the corresponding short tubes are driven by the adjusting device to drive the support rods to move relative to each other, so that the distance between the two first connecting rods is increased or decreased.

[0027] The two support rods are symmetrically connected to the two ends of the second connecting rod, and the plane surrounded by the two support rods and the second connecting rod is perpendicular to the plane where the two first connecting rods are located.

[0028] The two second connecting rods are each composed of two short tubes. In the two short tubes of each second connecting rod, the facing ends are connected by the adjusting device, and the other ends facing away are fixedly connected to the support rod through a connecting pipe.

[0029] An inner thread segment is provided on the inner wall of each short tube, and the thread directions of two adjacent short tubes are opposite; the adjusting device is a rotating rod, and both ends of the rotating rod are provided with external thread segments corresponding to the inner thread segments of the two adjacent short tubes.

[0030] The adjusting device is a rotating rod with an external thread section, which is fixedly connected to or integrally formed with one of the short rods, and an internal thread section corresponding to the external thread section of the rotating rod is provided on the inner wall of the other short rod.

[0031] A stop mechanism for limiting the rotation of the adjusting device is also provided on the outer wall of the short tube.

[0032] The adjusting device includes a mounting seat, a handle, a movable sleeve, a first pawl and a second pawl. One end of the mounting seat is fixed to the end of one of the short tubes, and the end of the other short tube is fixedly sleeved in the movable sleeve. The top surface of the movable sleeve is provided with a plurality of ratchets, and a rectangular groove is opened on the top surface of the mounting seat. The movable sleeve is passed through the mounting seat, and the ratchets are correspondingly located in the rectangular groove. The handle is rotatably connected to the mounting seat through a rotating shaft. The front and rear sides of the handle centered on the rotating shaft are respectively hinged with the first pawl and the second pawl. The length of the second pawl is greater than that of the first pawl. The first pawl advances along the ratchet as the handle swings, and the second pawl forms a stop.

[0033] A handle locking mechanism is also installed on the mounting seat, and the handle locking mechanism includes a hanging rod and a locking buckle. The hanging rod is fixed on the side wall of the handle, and the locking buckle is installed on the side wall of the mounting seat. When the handle is placed flat on the top surface of the mounting seat, the locking buckle is hung on the hanging rod.

[0034] The bed of the present invention may be any one of a folding bed, a camp bed, a pet bed or a pet camp bed.

[0035] From the above description of the structure of the present invention, it can be seen that compared with the prior art, the present invention has the following advantages:

[0036] This invention incorporates an adjustment device that allows the fabric cover to be attached to the fabric connection bracket while the cover is in a loose state. Finally, the adjustment device tightens the cover, significantly simplifying installation. Furthermore, if the cover becomes loose, the adjustment device drives the second connecting rod (or short rod) to move, increasing the distance between the two first connecting rods, thereby tightening the cover and maintaining its stable support. This also reduces the risk of damage to the cover, extending the bed's service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] FIG1 is a structural schematic diagram of the cloth cover in a relaxed state according to the first embodiment.

[0038] FIG2 is a cross-sectional view of FIG1 .

[0039] FIG3 is a structural schematic diagram of the cloth cover in a tightened state according to the first embodiment.

[0040] FIG4 is a cross-sectional view of FIG3 .

[0041] FIG5 is a schematic structural diagram of the anti-retraction mechanism of the first embodiment.

[0042] FIG6 is a cross-sectional view of FIG5.

[0043] FIG7 is a cross-sectional view of the flip cover in FIG6 when the flip cover is flipped upward and opened.

[0044] FIG8 is a schematic structural diagram of the anti-retraction mechanism of the second embodiment.

[0045] FIG9 is a schematic structural diagram of the anti-retraction mechanism of the third embodiment.

[0046] FIG10 is a schematic structural diagram of the fourth embodiment of the anti-retraction mechanism in the open state.

[0047] FIG11 is a schematic structural diagram of the locking mechanism of the fourth embodiment in the engaged state.

[0048] FIG12 is an exploded schematic diagram of the anti-retraction mechanism of Example 5;

[0049] FIG13 is a cross-sectional view of FIG12 .

[0050] FIG14 is a cross-sectional view of the fifth embodiment of the anti-retraction mechanism in a locked state.

[0051] FIG15 is a structural schematic diagram of the sixth embodiment of the cloth cover in a relaxed state.

[0052] FIG16 is a structural diagram of the sixth embodiment in which the cloth cover is in a tightened state.

[0053] FIG17 is a schematic structural diagram of a linear ratchet mechanism according to the sixth embodiment.

[0054] FIG18 is a cross-sectional view of the linear ratchet mechanism of Example 6 in a released state.

[0055] FIG19 is a cross-sectional view of the linear ratchet mechanism of the sixth embodiment in an advanced state.

[0056] FIG20 is a cross-sectional view of the linear ratchet mechanism of the sixth embodiment in a retracted state.

[0057] FIG21 is a cross-sectional view of the linear ratchet mechanism of Example 6 in a locked state.

[0058] FIG22 is a structural diagram of the seventh embodiment of the cloth cover in a relaxed state.

[0059] FIG23 is a cross-sectional view of FIG22.

[0060] FIG24 is a structural diagram of the seventh embodiment in which the cloth cover is in a tightened state.

[0061] FIG25 is a cross-sectional view of FIG24.

[0062] FIG26 is a cross-sectional view of the eighth embodiment of the cloth cover in a relaxed state.

[0063] FIG27 is a cross-sectional view of the eighth embodiment of the cloth cover in a tightened state.

[0064] FIG28 is a schematic structural diagram of the ninth embodiment of the cloth cover in a relaxed state.

[0065] FIG29 is a cross-sectional view of the handle in FIG28 in a released state.

[0066] FIG30 is a structural diagram of the ninth embodiment in which the cloth cover is in a tightened state.

[0067] FIG31 is a cross-sectional view of the handle in FIG30 in a released state.

[0068] FIG32 is a schematic structural diagram of the cloth cover in a relaxed state according to the tenth embodiment.

[0069] FIG33 is a cross-sectional view of FIG32.

[0070] FIG34 is a structural diagram of the cloth cover in a tightened state according to the tenth embodiment.

[0071] FIG35 is a cross-sectional view of FIG34.

[0072] FIG36 is a cross-sectional view of the cloth cover of the eleventh embodiment in a relaxed state.

[0073] FIG37 is a cross-sectional view of the cloth cover of the eleventh embodiment in a tightened state.

[0074] FIG38 is a structural diagram of the cloth cover in a relaxed state according to the twelfth embodiment.

[0075] FIG39 is a cross-sectional view of the handle in FIG38 in a released state.

[0076] FIG40 is a structural diagram of the cloth cover in a tightened state according to the twelfth embodiment.

[0077] Figure 41 is a cross-sectional view of the handle in Figure 40 in a released state. DETAILED DESCRIPTION

[0078] Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0079] Example 1

[0080] Referring to Figure 1 , a bed comprises a support frame 10, a fabric cover 20, a fabric cover connecting bracket 30, and an adjustment device. The fabric cover connecting bracket 30 is connected to the top of the support frame 10. The two side edges of the fabric cover 20 are fitted over the fabric cover connecting bracket 30 to form the bed surface. The fabric cover has a certain degree of tensile deformation capability, but its expansion and contraction rate is relatively small.

[0081] Referring to Figures 1 to 4 , the cloth cover connection bracket 30 of this embodiment is a quadrilateral frame, preferably a rectangular frame, formed by two first connecting rods 31 and two second connecting rods 32 connected in sequence. Each second connecting rod 32 is fitted with a first connecting sleeve 41 at its end, and the first connecting rod 31 is fixed to the side of the first connecting sleeve 41. To facilitate the connection of the first connecting rod 31, a second connecting sleeve 42 is fixed to the side of the first connecting sleeve 41, and the end of the first connecting rod 31 is fixedly sleeved within the second connecting sleeve 42.

[0082] An adjustment device is installed on the first connecting sleeve 41. As a preferred embodiment of the present invention, this embodiment shows a set of adjustment devices installed on the first connecting sleeves 41 at both ends of the same first connecting rod 31. Of course, the present invention only requires one first connecting sleeve 41 to be installed with an adjustment device, and two, three, or four first connecting sleeves may also be installed with adjustment devices.

[0083] 1 to 4 , the adjustment device is a rotating screw 51 having external threads. The inner wall of the first connecting sleeve 41 is provided with internal threads. The rotating screw 51 is screwed onto the internal threads from the outer side of the first connecting sleeve 41. The end of the rotating screw 51 is held against the end of the second connecting rod 32. Of course, in other embodiments, the end of the rotating screw 51 can also be fixedly connected to the end of the second connecting rod via rivets, so that when it rotates, it drives the second connecting rod to rotate synchronously.

[0084] Preferably, referring to Figure 2 , the rotating screw 51 includes a screw portion 511 having a hollow interior and a head portion 512 fixedly connected to the screw portion. The end of the second connecting rod 32 extends into the hollow interior of the screw portion 511 and is supported on the side wall of the end where the head portion 512 connects to the screw portion 511. Extending the second connecting rod 32 into the hollow interior of the screw portion can improve the connection strength of the second connecting rod 32.

[0085] 2 and 4 , when the cloth cover becomes loose, the rotating screw 51 is rotated to move the rotating screw 51 toward the first connecting sleeve 41 . When the rotating screw 51 moves, it simultaneously pushes the first connecting rod 31 outward, thereby increasing the distance between the two first connecting rods 31 and tightening the cloth cover.

[0086] 1 , a third connecting sleeve 43 is fixed to the bottom of the first connecting sleeve 41. The support frame 10 includes four support legs 11, and the upper end of each support leg 11 is sleeved within the third connecting sleeve 43. The first connecting sleeve 41, the second connecting sleeve 42, and the third connecting sleeve 43 are perpendicular to each other in three-dimensional space.

[0087] In order to prevent the adjusting device from rotating and causing the connection between the first connecting rod and the second connecting rod to become unstable, a stop mechanism is further provided at the first connecting sleeve 41 to limit the rotation of the adjusting device.

[0088] 5 to 7 , the anti-recoil mechanism of this embodiment includes a flap 61, a push rod 62, and a movable block 63. The flap 61 is connected to the head 512 in an upside-down manner. The push rod 62 is provided at the bottom of the flap 61, and the movable block 63 is provided at the front end of the screw portion 511 connected to the head 512. Several protrusions 411 are installed at the through hole of the first connecting sleeve 41 where it is mated with the rotating screw 51. When the rotating screw rotates, the flap 61 is opened, and the movable block 63 is maintained in the same plane with its corresponding screw portion under the action of the side wall of the flap 61. After the rotating screw is tightened, the flap 61 is flipped 180° to close. The push rod 62 at the bottom of the flap 61 flips to the top, pushing out the movable block 63, causing it to engage with the protrusions 411 of the first connecting sleeve 41, thereby forming a anti-recoil mechanism.

[0089] Example 2

[0090] 8 , the main difference between this embodiment and the first embodiment lies in the anti-retraction mechanism. The anti-retraction mechanism of this embodiment employs the following structure: a threaded hole 410 is formed in the side wall of the first connecting sleeve 41, and a bolt 412 is mounted on the threaded hole 410. When the rotating screw 51 is rotated into position, the end of the bolt 412 is screwed in so that it abuts against the rotating screw 51, thereby preventing the screw from retracting.

[0091] Example 3

[0092] Referring to Figure 9 , the primary difference between this embodiment and the first embodiment lies in the backstop mechanism. This embodiment's backstop mechanism is primarily applicable to applications where the end of the rotating screw of the adjustment device is fixedly connected to the end of the second connecting rod via rivets. This means that rotation of the rotating screw drives the second connecting rod in synchronous rotation. In this embodiment, the backstop mechanism employs the following structure: Instead of a rotating screw, the first connecting sleeve at the other end of the second connecting rod 32 has a threaded hole 410 defined in its sidewall, which is fitted with a bolt 412. When the rotating screw 51 is rotated into position, the bolt 412 is screwed in, causing its end to abut against the second connecting rod, thereby preventing backstopping.

[0093] Example 4

[0094] 10 and 11 , in this embodiment, the head 512 of the rotating screw 51 is provided with a flower-shaped tooth pattern to facilitate rotation of the rotating screw 51. The primary difference between this embodiment and the first embodiment lies in the retaining mechanism. This retaining mechanism utilizes a retaining ring 64 rotatably connected to the sidewall of the first connecting sleeve 41 via a connecting seat 65 . When the rotating screw 51 is fully rotated, the retaining ring 64 is flipped over and buckled onto the flower-shaped tooth pattern of the head 512 to prevent the screw from retracting.

[0095] Example 5

[0096] Referring to Figures 12 to 14, the main difference between this embodiment and Example 1 lies in the anti-retraction mechanism. The anti-retraction mechanism of this embodiment adopts the following structure: the anti-retraction mechanism of this embodiment includes a push switch 66, and a plurality of positioning grooves 5110 are provided on the circumferential surface of the front end of the screw portion 511 of the rotating screw (the end connected to the head). A switch mounting groove 413 is provided on the side wall of the front end of the first connecting sleeve 41 (the end closer to the head of the rotating screw), and the push switch 66 is installed on the switch mounting groove 413. The width of the bottom of the push switch 66 is smaller than the width of the positioning groove 5110.

[0097] One end of the switch mounting slot 413 is provided with a step 4131, and the other end is provided with a positioning protrusion 4132. One end of the push switch 66 is provided with a step groove 661 corresponding to the step 4131, and the other end is provided with a positioning groove 662 matching the positioning protrusion 4132.

[0098] When the positioning groove 662 of the push switch 66 is disengaged from the positioning protrusion 4132, and the positioning groove 662 is located above the positioning protrusion 4132, the bottom of the push switch 66 does not protrude from the inner wall of the first connecting sleeve 41, ensuring that the rotating screw 51 can rotate freely. When the rotating screw 51 is rotated into position, the end of the push switch 66 with the positioning groove 662 is pressed downward. If it cannot be pressed downward, the rotating screw 51 is slightly adjusted so that the positioning groove 5110 on the rotating screw 51 corresponds to the push switch 66. When the push switch 66 is pressed downward, the positioning groove 662 moves downward and sinks into the positioning protrusion 4132. At this time, the bottom of the corresponding end of the push switch 66 protrudes from the inner wall of the first connecting sleeve 41 and sinks into the positioning groove 5110, limiting the rotation of the rotating screw 51 and forming a stop.

[0099] Example 6

[0100] Referring to Figures 15 and 16 , the bed of this embodiment includes a support frame 10, a cloth cover 20, a cloth cover connecting bracket 30, and an adjustment device. The cloth cover connecting bracket 30 is connected to the top of the support frame 10, and the two side edges of the cloth cover 20 are mounted on the cloth cover connecting bracket 30 to form the bed surface.

[0101] Referring to Figures 15 and 16 , the cloth cover connection bracket 30 of this embodiment is a rectangular frame formed by two first connecting rods 31 and two second connecting rods 32 connected in sequence. A first connecting sleeve 41 is mounted at the end of each second connecting rod 32, and the first connecting rod 31 is fixed to the side of the first connecting sleeve 41. To facilitate the connection of the first connecting rod 31, a second connecting sleeve 42 is fixed to the side of the first connecting sleeve 41, and the end of the first connecting rod 31 is fixedly sleeved within the second connecting sleeve 42.

[0102] 15 , an adjusting device is installed at the first connecting sleeve 41. The main difference between this embodiment and the first embodiment is the structure of the adjusting device.

[0103] Referring to Figures 17 and 18 , the adjustment device of this embodiment is a linear ratchet mechanism, comprising a mounting seat 71, a handle 72, a movable sleeve 73, a first pawl 74, and a second pawl 75. A rectangular slot 413 is defined on the top surface of the first connecting sleeve 41, forming the mounting seat 71. The end of the second connecting rod 32 is sleeved within the movable sleeve 73. The top surface of the movable sleeve 73 is provided with a plurality of ratchet teeth 731, which are arranged in a straight line and at equal intervals along the top surface of the movable sleeve. The movable sleeve 73 is inserted into the mounting seat 71, and the ratchet teeth 731 are correspondingly located within the rectangular slot 413.

[0104] 17 and 18 , one end of the handle 72 is rotatably connected to the mounting base 71 via a rotating shaft 721. The handle 72 is hinged to a first pawl 74 and a second pawl 75 on its front and rear sides with the rotating shaft 721 as the center, respectively. The length of the second pawl 75 is greater than that of the first pawl 74. The first pawl 74 advances along the ratchet 731 as the handle 72 swings, while the second pawl 75 forms a stop.

[0105] When the lever 72 is in the unlocked position, the first pawl 74 will be released and the second pawl 75 will be in the unlocked position, so the lever 72 will be unlocked and the second pawl 75 will be in the unlocked position, so the lever 72 will be unlocked and the second pawl 75 will be in the unlocked position, so the lever 72 will be unlocked and the second pawl 75 will be in the unlocked position, so the lever 72 will be unlocked and the second pawl 75 will be in the unlocked position, so the lever 72 will be unlocked and the second pawl 75 will be in the unlocked position, so the lever 72 will be unlocked and the second pawl 75 will be in the unlocked position, so the lever 72 will be unlocked and the second pawl 75 will be in the unlocked position, so the lever 72 will be unlocked and the second pawl 75 will be in the unlocked position, so the lever 72 will be unlocked and the second pawl 75 will be in the unlocked position, so the lever 72 will be unlocked and the second pawl 21 , when the handle 72 is rotated to be parallel to the top surface of the mounting base 71 , the bottom of the rotating end of the first pawl 74 is sunk into the gap between the two ratchet teeth 731 , and the free end of the second pawl 75 is also disengaged from the ratchet teeth 731 and rotates to the top surface of the handle 72 .

[0106] 15 to 17 , when the cloth cover 20 becomes loose, the handle 72 can be pressed to cause the linear ratchet mechanism to push the movable sleeve 73 to move, and the movable sleeve 73 drives the second connecting rod 32 to move away from the linear ratchet mechanism, thereby causing the first connecting rod 31 to move outward, thereby tightening the cloth cover 20.

[0107] A handle locking mechanism is also installed on the mounting seat, and the handle locking mechanism includes a hanging rod 81 and a locking buckle 82. The hanging rod 81 is fixed on the side wall of the handle 72, and the locking buckle 82 is installed on the side wall of the mounting seat 71. When the handle 72 is placed flat on the top surface of the mounting seat 71, the locking buckle 82 is hung on the hanging rod 81 to lock the handle 72.

[0108] Example 7

[0109] A bed, as shown in Figures 22 or 24, also includes a support frame 10, a cloth cover 20, a cloth cover connecting bracket 30, and an adjustment device. The cloth cover connecting bracket 30 is connected to the top of the support frame 10, and the two side edges of the cloth cover 20 are mounted on the cloth cover connecting bracket 30 to form a bed surface.

[0110] Referring to Figures 22 and 23 , the cloth cover connecting bracket 30 of this embodiment is a quadrilateral frame, preferably a rectangular frame, formed by sequentially connecting two first connecting rods 31 and two second connecting rods 32. At least one of the second connecting rods 32 is composed of two or more short tubes 321, with adjacent short tubes 321 connected by the adjustment device. The short tubes 321 at each end of the second connecting rod 32 are also fixedly connected to the first connecting rod 31 via connecting pipe fittings.

[0111] Referring to Figures 22 to 25 , the two second connecting rods 32 shown in this embodiment are each formed by connecting two short tubes 321. Each short tube 321 has an internal threaded section 3211 on its inner wall, with the threads of adjacent short tubes 321 facing in opposite directions. The adjustment device is a rotating rod 52, each end of which has an externally threaded section 521 corresponding to the internal threaded sections 3211 of the adjacent short tubes. When the cloth cover becomes loose, the two rotating rods 52 are rotated simultaneously, causing the ends of the short tubes 321 to move outward simultaneously, pushing their corresponding first connecting rods 31 outward, thereby tightening the cloth cover 20.

[0112] In order to prevent the adjustment device from rotating and causing the short tubes 321 to move toward each other, a stop mechanism for limiting the rotation of the rotating rod is provided on the short tube 321. The stop mechanism of this embodiment can adopt the mechanism of embodiment 2 or embodiment 3, which will not be described in detail here.

[0113] Example 8

[0114] The main difference between this embodiment and embodiment seven is that the adjusting device is different. Referring to Figures 26 and 27, the adjusting device of this embodiment is also a rotating rod 52, which is integrally formed with one of the short rods 321. Of course, the rotating rod 52 can also be fixedly connected to the short tube 321. An internal thread section 3211 corresponding to the external thread section of the rotating rod 52 is provided on the inner wall of the other short rod 321. In this embodiment, since the short rod 321 integrally formed with the rotating rod 52 needs to rotate with the rotating rod 52 during adjustment, the short rod 321 is away from the other end of the rotating rod 52, and it is best to adopt a movable connection method to be connected to the first connecting sleeve to facilitate the rotation of the rotating rod during adjustment. When the cloth cover is loose, manually rotate the rotating rod to increase the distance between the short rod connected to the rotating rod and the other short rod, so as to push the corresponding first connecting rod to move outward, thereby tightening the cloth cover.

[0115] In addition, to prevent the rotating rod from rotating back when it is in place, a backstop mechanism can be provided on the outer wall of the short rod 321 with the internal thread section 3211, and specifically, the same threaded hole and bolt matching method as in the second embodiment can be adopted.

[0116] Example 9

[0117] A bed, as shown in Figures 28 or 30, also includes a support frame 10, a cloth cover 20, a cloth cover connecting bracket 30, and an adjustment device. The cloth cover connecting bracket 30 is connected to the top of the support frame 10, and the two side edges of the cloth cover 20 are mounted on the cloth cover connecting bracket 30 to form a bed surface.

[0118] Referring to Figure 28 , the cloth cover connecting bracket 30 of this embodiment is a rectangular frame formed by sequentially connecting two first connecting rods 31 and two second connecting rods 32. At least one of the second connecting rods 32 is composed of two or more short tubes 321, with adjacent short tubes 321 connected by the adjustment device. The short tubes 321 at both ends of the second connecting rod 32 are also fixedly connected to the first connecting rod 31 via connecting pipe fittings.

[0119] The main difference between this embodiment and the seventh embodiment lies in the structure of the adjustment device. Referring to Figures 29 and 29, the adjustment device of this embodiment is a linear ratchet mechanism, comprising a mounting base 71, a handle 72, a movable sleeve 73, a first pawl 74, and a second pawl 75. One end of the mounting base 71 is fixed to the end of one of the short tubes 321, and the end of the other short tube 321 is fixedly sleeved within the movable sleeve 73. A rectangular groove 413 is defined on the top surface of the mounting base 71, and a plurality of ratchet teeth 731 are provided on the top surface of the movable sleeve 73. The movable sleeve 73 is inserted into the mounting base 71, and the ratchet teeth 731 are correspondingly located within the rectangular grooves 413. The handle 72 is rotatably connected to the mounting base 71 via a rotating shaft 721. The handle 72 is hingedly connected to a first pawl 74 and a second pawl 75 on its front and rear sides, centered around the rotation axis 721. The second pawl 75 is longer than the first pawl 74. The first pawl 74 advances along the ratchet teeth 731 as the handle 72 swings, while the second pawl prevents the handle from retracting. The principles of advancing and retracting the linear ratchet mechanism are the same as those in Example 6 and will not be described in detail here.

[0120] Referring to Figures 28 and 29, a handle locking mechanism is also installed on the mounting seat, and the handle locking mechanism includes a hanging rod 81 and a locking buckle 82. The hanging rod 81 is fixed on the side wall of the handle 72, and the locking buckle 72 is installed on the side wall of the mounting seat 71. When the handle 72 is placed flat on the top surface of the mounting seat 71, the locking buckle 82 is hung on the hanging rod 81 to lock the handle 72.

[0121] Example 10

[0122] The bed of this embodiment, as shown in Figures 32 or 34, also includes a support frame 10, a cloth cover 20, a cloth cover connecting bracket 30, and an adjustment device. The cloth cover connecting bracket 30 is connected to the top of the support frame 10, and the two side edges of the cloth cover 20 are mounted on the cloth cover connecting bracket 30 to form the bed surface.

[0123] With reference to Figures 32 to 35, the cloth cover connecting bracket 30 of the present embodiment includes two first connecting rods 31 arranged in parallel, and the support frame 10 includes two groups of support rods, the same side end of the two first connecting rods 31 is connected to a group of the support rods, the support rods include two support rods 12 and a second connecting rod 32, the lower ends of the two support rods 12 are symmetrically connected to the two ends of the second connecting rod 32, and the support rods are preferably formed at an obtuse angle with their corresponding second connecting rods 32 to provide good supporting force. Of course, as long as the strength of the support rods is large enough, the support rods and their corresponding second connecting rods 32 can also form a right angle or an acute angle. The upper end of each support rod 12 is fixedly connected to the end bottom surface of the first connecting rod 31, and the plane surrounded by the two support rods 12 and the second connecting rod 32 is perpendicular to the plane where the two first connecting rods 31 are located.

[0124] Among them, at least one group of second connecting rods 32 is composed of two or more short tubes 321, and two adjacent short tubes 321 are connected by the adjustment device.

[0125] Referring to Figures 32 and 33, the two second connecting rods 32 shown in this embodiment are each formed by connecting two short tubes 321. An internal thread segment 3211 is provided on the inner wall of each short tube 321, and the thread directions of the two short tubes 321 are opposite; the adjustment device is a rotating rod 52, and the two ends of the rotating rod 52 are respectively provided with external thread segments 521 correspondingly connected to the internal thread segments of the two short tubes. Referring to Figures 33 and 35, when the cloth cover 20 becomes loose, the two rotating rods 52 are rotated at the same time to move the ends of the short tubes 321 to both sides at the same time. Since the ends of each short tube 321 are connected to the first connecting rod 31 through the support rod 12, the short tube 321 moves to both sides, and at the same time, it also pushes the first connecting rod 31 connected to the support rod 12 to move outward, thereby tightening the cloth cover 20.

[0126] In order to prevent the adjustment device from rotating and causing the short tubes to move toward each other, a stop mechanism is provided on the short rod 321 to limit the rotation of the rotating rod 52. The stop mechanism is the same as that in the second or third embodiment and will not be described in detail here.

[0127] The end of the short tube 321 and its corresponding support rod 12 may be formed in one piece, or may be fixedly connected via a pipe sleeve.

[0128] Example 11

[0129] The main difference between this embodiment and the tenth embodiment is that the adjustment device is different. Referring to Figures 36 and 37, the adjustment device of this embodiment is also a rotating rod 52, which is integrally formed with one of the short rods 321. Of course, the rotating rod 52 can also be fixedly connected to the short tube 321. The inner wall of the other short rod 321 is provided with an internal thread section 3211 corresponding to the external thread section of the rotating rod 52. In this embodiment, since the short rod 321 integrally formed with the rotating rod 52 needs to rotate with the rotating rod 52 during adjustment, the short rod 321 is away from the other end of the rotating rod 52. It is best to adopt a movable connection method to be connected to the support rod 12 to facilitate the rotation of the rotating rod during adjustment. When the cloth cover is loose, the rotating rod is manually rotated to increase the distance between the short rod connected to the rotating rod and the other short rod, and the corresponding first connecting rod is pushed outward through the support rod 12, thereby tightening the cloth cover.

[0130] In addition, to prevent the rotating rod from rotating back when it is in place, a backstop mechanism can be provided on the outer wall of the short rod 321 with the internal thread section 3211, and specifically, the same threaded hole and bolt matching method as in the second embodiment can be adopted.

[0131] Example 12

[0132] 38 and 40 , the bed of this embodiment also includes a support frame 10, a cloth cover 20, a cloth cover connecting bracket 30, and an adjustment device. The cloth cover connecting bracket 30 is connected to the top of the support frame 10, and the two side edges of the cloth cover 20 are mounted on the cloth cover connecting bracket 30 to form the bed surface.

[0133] 38 and 40 , the cloth cover connecting bracket 30 of this embodiment includes two first connecting rods 31 arranged in parallel, and the support frame 10 includes two groups of support rods, and the same side ends of the two first connecting rods 31 are connected to a group of support rods, and the support rods include two support rods 12 and a second connecting rod 32.

[0134] 38 and 40 , at least one set of second connecting rods 32 is composed of two or more short tubes 321 , and two adjacent short tubes 321 are connected by the adjusting device.

[0135] The primary difference between this embodiment and the tenth embodiment lies in the structure of the adjustment device. The adjustment device of this embodiment utilizes the same linear ratchet mechanism as that of the eighth embodiment, and as shown in Figures 39 and 41 , comprises a mounting base 71, a handle 72, a movable sleeve 73, a first pawl 74, and a second pawl 75. One end of the mounting base 71 is fixed to the end of one of the short tube sections 321, while the end of the other short tube section 321 is fixedly sleeved within the movable sleeve 73. A rectangular slot 413 is defined on the top surface of the mounting base 71, and a plurality of ratchet teeth 731 are disposed on the top surface of the movable sleeve 73. The movable sleeve 73 extends through the mounting base 71, with the ratchet teeth 731 correspondingly positioned within the rectangular slots 413. The handle 72 is rotatably connected to the mounting base 71 via a rotating shaft 721. The handle 72 is hingedly connected to a first pawl 74 and a second pawl 75 on its front and rear sides, centered around the rotation axis 721. The second pawl 75 is longer than the first pawl 74. The first pawl 74 advances along the ratchet teeth 731 as the handle 72 swings, while the second pawl prevents the handle from retracting. The principles of advancing and retracting the linear ratchet mechanism are the same as those in Example 6 and will not be described in detail here.

[0136] Referring to Figures 38 and 39, a handle locking mechanism is also installed on the mounting seat 71, and the handle locking mechanism includes a hanging rod 81 and a locking buckle 82. The hanging rod 81 is fixed on the side wall of the handle 72, and the locking buckle 72 is installed on the side wall of the mounting seat 71. When the handle 72 is placed flat on the top surface of the mounting seat 71, the locking buckle 82 is hung on the hanging rod 81 to lock the handle 72.

[0137] When the length of the first connecting rod is relatively long, in order to facilitate transportation, each first connecting rod in the above embodiments can also be formed by fixedly splicing multiple connecting rod sections.

[0138] The “first connecting rod moves outward” described in the above embodiments refers to the first connecting rod moving in a direction away from the central axis of the bed surface.

[0139] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A bed, comprising a support frame, a cloth cover and a cloth cover connecting bracket, wherein the cloth cover connecting bracket is connected to the top or upper middle part of the support frame, the cloth cover connecting bracket is a quadrilateral frame formed by connecting two first connecting rods and two second connecting rods in sequence, and the four side edges of the cloth cover are respectively connected to the first connecting rods and the second connecting rods to form a bed surface, characterized in that: At least one of the second connecting rods is provided with a connecting piece, and the connecting piece is provided with an adjusting device for driving the second connecting rod to move, and the distance between the two first connecting rods is increased or decreased by the adjusting device.

2. A bed as claimed in claim 1, characterized in that: Two first connecting rods and two second connecting rods are connected in sequence to form a rectangular frame, a first connecting sleeve is installed at the end of each second connecting rod, and two ends of the first connecting rod are respectively connected to the side surfaces of the first connecting sleeve.

3. A bed as claimed in claim 1 or 2, characterized in that: One of the first connecting sleeves of each first connecting rod is respectively provided with an adjusting device.

4. A bed as claimed in claim 3, characterized in that: The adjusting device is a rotating screw with an external thread. The inner wall of the first connecting sleeve is provided with an internal thread. The rotating screw is spirally connected to the internal thread from the outer side of the first connecting sleeve. The end of the rotating screw is fixedly connected or in contact with the end of the second connecting rod.

5. A bed as claimed in claim 4, characterized in that: The rotating screw includes a screw portion with a hollow structure inside and a head fixedly connected to the screw portion. The end of the second connecting rod extends into the hollow structure and is supported on the inner wall of the end where the head is connected to the screw portion.

6. A bed as claimed in claim 4 or 5, characterized in that: A stop mechanism for limiting the rotation of the adjusting device is also provided at the first connecting sleeve.

7. A bed as claimed in claim 6, characterized in that: The anti-retraction mechanism includes a flap, a push rod and a movable block, wherein the flap can be connected to the head of the rotating screw in an upside-down manner, a push rod is provided at the lower part of the flap, and a movable block is provided at the front end where the screw part of the rotating screw is connected to the head; a plurality of protrusions are installed at the through hole where the first connecting sleeve is matched with the rotating screw.

8. A bed as claimed in claim 3, characterized in that: The adjusting device is a linear ratchet mechanism, which includes a mounting seat, a handle, a movable sleeve, a first pawl and a second pawl. A rectangular groove is provided on the top surface of the first connecting sleeve to form the mounting seat. The end of the second connecting rod is sleeved in the movable sleeve. A plurality of ratchet teeth are provided on the top surface of the movable sleeve. The movable sleeve is inserted into the mounting seat, and the ratchet teeth are correspondingly located in the rectangular groove. The handle is rotatably connected to the mounting seat through a rotating shaft. The first pawl and the second pawl are respectively hinged on the front and rear sides of the handle with the rotating shaft as the center. The length of the second pawl is greater than that of the first pawl. The first pawl advances along the ratchet teeth as the handle swings, and the second pawl forms a stop.

9. A bed as claimed in claim 8, characterized in that: A handle locking mechanism is also installed on the mounting seat, and the handle locking mechanism includes a hanging rod and a locking buckle. The hanging rod is fixed on the side wall of the handle, and the locking buckle is installed on the side wall of the mounting seat. When the handle is placed flat on the top surface of the mounting seat, the locking buckle is hung on the hanging rod.

10. A bed as claimed in claim 3, characterized in that: A second connecting sleeve is fixedly provided on the side of the first connecting sleeve, and the first connecting rod is fixed in the second connecting sleeve; a third connecting sleeve is also fixed to the bottom of the first connecting sleeve, and the support frame includes four supporting legs, and the upper end of each supporting leg is sleeved in the third connecting sleeve; the first connecting sleeve, the second connecting sleeve and the third connecting sleeve are perpendicular to each other in three-dimensional space.

11. A bed as claimed in claim 1, characterized in that: The bed is any one of a folding bed, a camp bed, a pet bed or a pet camp bed.

12. A bed, comprising a support frame, a cloth cover and a cloth cover connecting bracket, wherein the cloth cover connecting bracket is connected to the top or upper middle part of the support frame, the cloth cover connecting bracket is a quadrilateral frame formed by connecting two first connecting rods and two second connecting rods in sequence, and the four side edges of the cloth cover are respectively connected to the first connecting rods and the second connecting rods to form a bed surface, characterized in that: At least one of the second connecting rods is composed of two or more short tubes, and at least two adjacent short tubes are connected by an adjusting device, and the adjusting device drives the corresponding short tubes to move relative to each other to increase or decrease the distance between the two first connecting rods.

13. A bed as claimed in claim 12, characterized in that: The two second connecting rods are each composed of two short tubes. In the two short tubes of each second connecting rod, the facing ends are connected through the adjusting device, and the other ends facing away are fixedly connected to the first connecting rod through a connecting pipe fitting.

14. A bed as claimed in claim 12, characterized in that: An inner thread segment is provided on the inner wall of each short tube, and the thread directions of two adjacent short tubes are opposite; the adjusting device is a rotating rod, and both ends of the rotating rod are respectively provided with external thread segments corresponding to the inner thread segments of two adjacent short tubes.

15. A bed as claimed in claim 12, characterized in that: The adjusting device is a rotating rod with an external thread section, which is fixedly connected to or integrally formed with one of the short rods, and an internal thread section corresponding to the external thread section of the rotating rod is provided on the inner wall of the other short rod.

16. A bed according to claim 14 or 15, characterized in that: A stop mechanism for limiting the rotation of the adjusting device is also provided on the outer wall of the short tube.

17. A bed as claimed in claim 12, characterized in that: The adjusting device includes a mounting seat, a handle, a movable sleeve, a first pawl and a second pawl. One end of the mounting seat is fixed to the end of one of the short tubes, and the end of the other short tube is fixedly sleeved in the movable sleeve. The top surface of the movable sleeve is provided with a plurality of ratchets, and a rectangular groove is opened on the top surface of the mounting seat. The movable sleeve is inserted into the mounting seat, and the ratchets are correspondingly located in the rectangular groove. The handle is rotatably connected to the mounting seat through a rotating shaft. The front and rear sides of the handle with the rotating shaft as the center are respectively hinged with the first pawl and the second pawl. The length of the second pawl is greater than that of the first pawl. The first pawl progresses along the ratchet as the handle swings, and the second pawl forms a stop.

18. A bed according to claim 17, characterized in that: A handle locking mechanism is also installed on the mounting seat, and the handle locking mechanism includes a hanging rod and a locking buckle. The hanging rod is fixed on the side wall of the handle, and the locking buckle is installed on the side wall of the mounting seat. When the handle is placed flat on the top surface of the mounting seat, the locking buckle is hung on the hanging rod.

19. A bed as claimed in claim 12, characterized in that: The bed is any one of a folding bed, a camp bed, a pet bed or a pet camp bed.

20. A bed, comprising a support frame, a cloth cover and a cloth cover connecting bracket, wherein the cloth cover connecting bracket is connected to the top or upper middle part of the support frame, the cloth cover connecting bracket comprises two first connecting rods, the cloth cover is connected to the two first connecting rods to form a bed surface, characterized in that: The support frame includes at least two groups of support rods spaced apart at the bottom of the first connecting rod, the support rods include two support rods and a second connecting rod, the lower ends of the two support rods are connected to the two ends of the second connecting rod, the upper end of each support rod is fixedly connected to the first connecting rod, at least one of the second connecting rods is composed of two or more short tubes, and at least two adjacent short tubes are connected by an adjusting device, and the corresponding short tubes are driven by the adjusting device to drive the support rods to move relative to each other, so that the distance between the two first connecting rods is increased or decreased.

21. A bed as claimed in claim 20, characterized in that: The two support rods are symmetrically connected to two ends of the second connecting rod, and a plane surrounded by the two support rods and the second connecting rod is perpendicular to a plane where the two first connecting rods are located.

22. A bed as claimed in claim 21, characterized in that: The two second connecting rods are each composed of two short tubes. In the two short tubes of each second connecting rod, the facing ends are connected through the adjusting device, and the other ends facing away are fixedly connected to the support rod through a connecting pipe fitting.

23. A bed as claimed in claim 22, characterized in that: An inner thread segment is provided on the inner wall of each short tube, and the thread directions of two adjacent short tubes are opposite; the adjusting device is a rotating rod, and both ends of the rotating rod are respectively provided with external thread segments corresponding to the inner thread segments of two adjacent short tubes.

24. A bed as claimed in claim 22, characterized in that: The adjusting device is a rotating rod with an external thread section, which is fixedly connected to or integrally formed with one of the short rods, and an internal thread section corresponding to the external thread section of the rotating rod is provided on the inner wall of the other short rod.

25. A bed according to claim 23 or 24, characterized in that: A stop mechanism for limiting the rotation of the adjusting device is also provided on the outer wall of the short tube.

26. A bed as claimed in claim 22, characterized in that: The adjusting device includes a mounting seat, a handle, a movable sleeve, a first pawl and a second pawl. One end of the mounting seat is fixed to the end of one of the short tubes, and the end of the other short tube is fixedly sleeved in the movable sleeve. The top surface of the movable sleeve is provided with a plurality of ratchets, and a rectangular groove is opened on the top surface of the mounting seat. The movable sleeve is inserted into the mounting seat, and the ratchets are correspondingly located in the rectangular groove. The handle is rotatably connected to the mounting seat through a rotating shaft. The front and rear sides of the handle with the rotating shaft as the center are respectively hinged with the first pawl and the second pawl. The length of the second pawl is greater than that of the first pawl. The first pawl progresses along the ratchet as the handle swings, and the second pawl forms a stop.

27. A bed as claimed in claim 26, characterized in that: A handle locking mechanism is also installed on the mounting seat, and the handle locking mechanism includes a hanging rod and a locking buckle. The hanging rod is fixed on the side wall of the handle, and the locking buckle is installed on the side wall of the mounting seat. When the handle is placed flat on the top surface of the mounting seat, the locking buckle is hung on the hanging rod.

28. A bed as claimed in claim 1, characterized in that: The bed is any one of a folding bed, a camp bed, a pet bed or a pet camp bed.

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