Bed frame folding mechanism and bed frame

Abstract

The application discloses a bed frame folding mechanism for a bed frame. The bed frame comprises a frame part and a support part. The bed frame folding mechanism comprises a crossbar positioned below the frame part, a connecting rod with a first end pivotally connected to the support part, and a clamping assembly sleeved on the crossbar, wherein a second end of the connecting rod opposite to the first end is pivotally connected to the clamping assembly, and the clamping assembly can be operated to fix the clamping assembly with the crossbar or make the clamping assembly slidable relative to the crossbar. The bed frame folding mechanism is stable in structure and not easy to shake during use.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of baby cribs, and in particular, to a bed frame folding mechanism and a bed frame having the same. BACKGROUND

[0002] A baby crib is a baby product for resting, which provides convenience for a caretaker to take care of a baby. Currently, the bed frame with foldable support legs on the market is more common in the unfolded use state, and the support legs are prone to shaking, which causes the baby crib to be unstable during use, thereby causing a poor user experience.

[0003] Therefore, there is a need for a bed frame of a baby crib that is stable and not prone to shaking. SUMMARY

[0004] One object of the present application is to provide a bed frame folding mechanism that can stabilize the bed frame in a use state and is not prone to shaking.

[0005] Another object of the present application is to provide a bed frame folding mechanism that is structurally reliable and easy to operate.

[0006] An object of the present application is also to provide a bed frame folding mechanism that can alleviate or eliminate at least one of the above-mentioned defects.

[0007] An object of the present application is also to provide a bed frame comprising the above-mentioned bed frame folding mechanism.

[0008] To achieve the above object, one aspect of the present application provides a bed frame folding mechanism for a bed frame, the bed frame comprising a frame portion and a support portion, characterized in that the bed frame folding mechanism comprises: a crossbar positioned below the frame portion; a link having a first end pivotably connected to the support portion; and a clamping assembly sleeved on the crossbar, wherein a second end of the link opposite to the first end is pivotably connected to the clamping assembly, and the clamping assembly can be operated to fix the clamping assembly with the crossbar or to enable the clamping assembly to slide relative to the crossbar.

[0009] In one embodiment, the clamping assembly can be fixed with the crossbar at at least two positions.

[0010] In one embodiment, the support portion of the bed frame can be pivoted relative to the frame portion between an unfolded position and a folded position, the crossbar is formed with a folded fixing groove and an unfolded fixing groove, the clamping assembly is fixed in the unfolded fixing groove when the support portion is in the unfolded position, and the clamping assembly is fixed in the folded fixing groove when the support portion is in the folded position.

[0011] In one embodiment, the clamping assembly comprises a sliding sleeve formed as a housing of the clamping assembly; a release button at least partially exposed to the outside of the sliding sleeve and capable of being actuated; a clamping portion displaced in a first direction in response to the release button being actuated; and a restoring member applying a force in a second direction opposite to the first direction to the clamping portion, such that the restoring member tends to displace the clamping portion in the second direction in the absence of the release button being actuated.

[0012] In one embodiment, the peripheral dimension of the clamping portion corresponds to the dimension of the deployment fixing groove.

[0013] In one embodiment, the clamping portion is tightly fitted with the deployment fixing groove.

[0014] In one embodiment, the clamping assembly comprises a release button and a clamping portion formed on both sides of the crossbar, and the crossbar comprises a folding fixing groove and a deployment fixing groove corresponding to the clamping portion.

[0015] In one embodiment, the clamping assembly has one or two restoring members.

[0016] In one embodiment, the first direction is a direction away from the crossbar, and the second direction is a direction towards the crossbar.

[0017] In one embodiment, a guide portion is provided on the clamping portion, and the guide portion is capable of guiding the clamping portion into the folding fixing groove and / or the deployment fixing groove.

[0018] In one embodiment, a recess is formed on the crossbar, and the recess is formed at a position corresponding to the folding fixing groove and / or the deployment fixing groove in the length direction of the crossbar, and a protrusion is provided on the sliding sleeve and fitted with the recess; or a protrusion is formed on the crossbar, and the protrusion is formed at a position corresponding to the folding fixing groove and / or the deployment fixing groove in the length direction of the crossbar, and a recess is provided on the sliding sleeve and fitted with the protrusion.

[0019] In one embodiment, in the case where the recess is formed on the crossbar, an elastically deformed portion is formed on the sliding sleeve, and the protrusion is provided on the inner surface of the elastically deformed portion; or in the case where the protrusion is formed on the crossbar, an elastically deformed portion is formed on the sliding sleeve, and the recess is provided on the inner surface of the elastically deformed portion.

[0020] In one embodiment, the sliding sleeve comprises an upper housing and a lower housing fitted with each other, and the elastically deformed portion is provided on the upper housing and / or the lower housing.

[0021] In one embodiment, the connecting rod comprises a first pivot shaft rotatably arranged to the support part, a second pivot shaft rotatably arranged to the clamping assembly, a first connecting rod part connecting one end of the first pivot shaft and the second pivot shaft, and a second connecting rod part connecting the other end of the first pivot shaft and the second pivot shaft, wherein the first connecting rod part and the second connecting rod part are formed on two sides of the crossbar, respectively.

[0022] In one embodiment, the first connecting rod part and the second connecting rod part are formed in a bent shape and are mirror-symmetrical to each other.

[0023] In one embodiment, the first connecting rod part and the second connecting rod part are formed in a bent shape and are mirror-symmetrical to each other.

[0024] In one embodiment, the horizontal height of the two ends of the crossbar is greater than the horizontal height of the middle part of the crossbar.

[0025] Another aspect of the present application provides a bed frame comprising a frame part, a support part, and a bed frame folding mechanism as described above.

[0026] In one embodiment, the bed frame comprises two support parts, the bed frame folding mechanism comprises two connecting rods and two clamping assemblies, and the opposite two sides of the crossbar are formed with folding fixing grooves and unfolding fixing grooves.

[0027] The bed frame folding mechanism of the present application makes the bed frame stable and not easy to shake when in use, and the connection between the frame part and the support part of the bed frame is reliable, compact and free of undesirable gaps. Meanwhile, the folding operation of the bed frame is simple, convenient, labor-saving and not easy to misoperate. BRIEF DESCRIPTION OF DRAWINGS

[0028] The various objects, features and advantages of the present application will become more apparent from the following detailed description of preferred embodiments of the application considered in conjunction with the drawings. The drawings are not intended to be to scale. In the drawings, like reference numerals refer to like items throughout. Among others:

[0029] Figure 1 is a perspective view of the bed frame of the present application;

[0030] Figure 2 is a partial enlarged view of Figure 1

[0031] Figure 3 is another perspective view of the bed frame of the present application;

[0032] Figure 4 is a partial enlarged view of Figure 3

[0033] ​​Figure 5 is a perspective view of a support portion of the bed frame of the present application in a collapsed position;

[0034] Figure 6 is Figure 5 is a partial enlarged view of

[0035] Figure 7 is a schematic partial cross-sectional perspective view of a bed frame collapsing mechanism of the present application;

[0036] Figure 8 is another schematic partial cross-sectional perspective view of a bed frame collapsing mechanism of the present application;

[0037] Figure 9 is yet another schematic partial cross-sectional perspective view of a bed frame collapsing mechanism of the present application;

[0038] Figure 10 is still another schematic partial cross-sectional perspective view of a bed frame collapsing mechanism of the present application;

[0039] Figure 11 is an exploded perspective view of one embodiment of a latching assembly of a bed frame collapsing mechanism of the present application;

[0040] Figure 12 is another exploded perspective view of one embodiment of a latching assembly of a bed frame collapsing mechanism of the present application;

[0041] Figure 13 is a bottom perspective view of part of the elements of another embodiment of a bed frame collapsing mechanism of the present application;

[0042] Figure 14 is a cross-sectional view of part of the elements of another embodiment of a bed frame collapsing mechanism of the present application.

[0043] List of Reference Numerals:

[0044] bed frame 1

[0045] frame portion 10

[0046] support portion 20

[0047] bed frame collapsing mechanism 30

[0048] link 310

[0049] first pivot shaft 311

[0050] second pivot shaft 312

[0051] first link portion 313

[0052] second link portion 314

[0053] crossbar 320

[0054] Folding fixing groove 321

[0055] Unfolding fixing groove 322

[0056] Upper recess 323

[0057] Lower recess 324

[0058] Engaging assembly 330

[0059] Sliding sleeve 331

[0060] Upper shell 3311

[0061] Lower shell 3312

[0062] Lock release button 332

[0063] Engaging portion 333

[0064] Receiving groove 3331

[0065] Guiding portion 3332

[0066] Reset member 334, 334'

[0067] Lever member 335

[0068] Elastically deformable portion 336

[0069] Upper protruding portion 337

[0070] Lower protruding portion 338 DETAILED DESCRIPTION

[0071] In order to further illustrate the principles and configurations of the present application, preferred embodiments of the present application will now be described in detail, however, the described embodiments are only provided for the purpose of explanation and illustration, and cannot be used to limit the patent protection scope of the present application.

[0072] The terms used in the present application are merely for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items. The "first direction", "second direction" and the like used in the present application do not have a limiting meaning, but are used for differentiation.

[0073] Reference is made to Figure 1 , Figure 2 and Figure 5The bed frame 1 of the present application is foldable, and can be used for a baby or a child to sleep or play thereon. The bed frame 1 can include a frame portion 10 and support portions 20. The frame portion 10 can be used to provide a play space for a baby or a child. The support portions 20 can be two. The two support portions 20 can be disposed below both ends of the longer sides of the frame portion 10. The present application does not limit the number of the support portions 20. The support portions 20 can be pivoted relative to the frame portion 10 between an unfolded position (as shown in Figure 1 ) and a folded position. The folded position can be a position in which all the support portions 20 are pivoted to be close to the horizontal direction. In the folded position, the bed frame 1 can have a small volume, thereby facilitating storage and transportation.

[0074] The bed frame folding mechanism 30 can be connected to the frame portion 10 and the support portions 20, respectively, to facilitate operation of the support portions 20 to be easily folded, and can stably maintain the support portions 20 in the unfolded position or the folded position.

[0075] The bed frame folding mechanism 30 can include a cross bar 320 positioned below the frame portion 10, a link 310 having a right end (non-limiting) (see Figure 2 ) pivotally connected to the support portions 20, and a clamping assembly 330 fitted on the cross bar 320. A left end (non-limiting) of the link 310 can be pivotally connected to the clamping assembly 330. The clamping assembly 330 can be manipulated to fix the clamping assembly 330 to the cross bar 320 or to make the clamping assembly 330 slidable relative to the cross bar 320.

[0076] The cross bar 320 can be centrally disposed below the lower surface of the frame portion 10 in the direction of the longer sides of the frame portion 10 (left-right direction of Figure 1 ). The cross bar 320 can have a hollow structure. Both ends of the cross bar 320 can be engaged with the frame portion 10 or the position at which the frame portion 10 and the support portions 20 are combined; alternatively, both ends of the cross bar 320 can be fixed to the frame portion 10 or the position at which the frame portion 10 and the support portions 20 are combined. The cross bar 320 can remain stationary during pivoting of the support portions 20.

[0077] The cross bar 320 can be formed with a folding fixing groove 321 and an unfolding fixing groove 322 (as shown in Figure 8 and Figure 9 ). When the support portions 20 are in the unfolded position, the clamping assembly 330 can be fixed to the unfolding fixing groove 322, so that the frame portion 10 can be stably supported without shaking, and when the support portions 20 are in the folded position, the clamping assembly 330 can be fixed to the folding fixing groove 321, so that the support portions 20 are maintained in the folded position without being undesirably unfolded.

[0078] Optionally, the crossbar 320 can further have fixing slots other than the folding fixing slot 321 and the unfolding fixing slot 322, so that the support part 20 can be kept at a desired angle or position as needed.

[0079] In the present embodiment, the crossbar 320 has one folding fixing slot 321 and one unfolding fixing slot 322 on each side. The present application does not limit the number of folding fixing slots 321 and unfolding fixing slots 322. Correspondingly, in the present embodiment, the bed frame folding mechanism 30 can have two connecting rods 310 and two clamping assemblies 330. The present application does not limit the number of connecting rods 310 and clamping assemblies 330. Optionally, the crossbar 320 can have other numbers of folding fixing slots 321 and unfolding fixing slots 322, and the bed frame folding mechanism 30 can have other numbers of connecting rods 310. Optionally, the number of folding fixing slots 321 and unfolding fixing slots 322 corresponds to the number of connecting rods 310, and corresponds to the number of clamping assemblies 330. In the present embodiment, the bed frame folding mechanism 30 has one crossbar 320. Optionally, the bed frame folding mechanism 30 can have other numbers of crossbars 320, which can be arranged parallel to each other or at an angle.

[0080] As shown in Figure 2 , Figure 4 , Figures 6-8 The clamping assembly 330 can include a sliding sleeve 331 formed as a housing of the clamping assembly 330, a release button 332 at least partially exposed to the outside of the sliding sleeve 331 and actuatable, and a clamping part 333 displaced (or moved a distance) in a direction away from the crossbar 320 (first direction) in response to the release button 332 being actuated, as shown in

[0081] The sliding sleeve 331 can be formed as a relatively flat approximate hexahedron shape, which is convenient to hold and operate with hands. The release button 332 can be two, arranged on both sides of the sliding sleeve 331, and convenient to actuate by pressing inward (toward the crossbar 320) with fingers (such as the thumb and index finger). Two release buttons 332 can achieve more stable fixation, and the two release buttons 332 can be symmetrically arranged. The release button 332 can be other numbers, and the present application does not limit the number of release buttons 332.

[0082] As shown in Figures 7-10 One side of the clamping part 333 can have a receiving slot 3331. A lever member 335 can be arranged between the release button 332 and the receiving slot 3331, so that when the release button 332 is pressed inward (as shown by the arrow A in Figure 7When the reset member 334 is pressed (as indicated by the arrow in FIG. 3), the lever member 335 pushes the engaging portion 333 outward through the receiving slot 3331.

[0083] The reset member 334 can be formed as an elastic element as shown in FIG. 3. Figures 7-10 Figure 10 The shape of the reset member 334 in FIG. 3 is the shape of the reset member 334 in a natural state. Thus, when the reset member 334 is arranged in the receiving slot 3331 of the two engaging portions 333, the reset member 334 is in an elastically deformed state, thereby being able to apply a constant inward force to the two engaging portions 333. The engaging portions 333 can be of other numbers, and the present application does not limit the number of the engaging portions 333.

[0084] In other embodiments, the reset member 334 can be formed as a spring arranged between the engaging portion 333 and the inner wall of the sliding sleeve 331. The reset member 334 can also be formed in other forms, as long as it is able to apply an inward pushing force to the engaging portion 333.

[0085] In other embodiments, the engaging assembly 330 can have only one release button 332 and one engaging portion 333. The reset member 334 can be arranged as one, two or more as needed.

[0086] The peripheral size of the engaging portion 333 can correspond to the size of the folding fixing slot 321 and the unfolding fixing slot 322, so that the engaging portion 333 can be exactly inserted into and held in the folding fixing slot 321 or the unfolding fixing slot 322. When the engaging portion 333 is inserted into the folding fixing slot 321 or the unfolding fixing slot 322, the gap between the engaging portion 333 and the folding fixing slot 321 or the unfolding fixing slot 322 is as small as possible, or is formed as a tight fit. Because of the elastic restoring force of the reset member 334, the sliding sleeve 331 is not easily slid, so that the bed frame 1 is more stable after unfolding and does not shake. More specifically, the unfolding fixing slot 322 is a through hole, and the engaging portion 333 is directly inserted into the through hole, thereby increasing the fitting area between the engaging portion 333 and the unfolding fixing slot 322, so that the sliding sleeve 331 is more reliably limited and fixed with the cross bar 320, that is, the frame portion 10 and the support portion 20 do not shake relative to each other, so as to ensure the stability of the bed frame 1 after unfolding, especially under the action of the reset member 334, the engaging portion 333 is inserted deeper into the through hole, the fitting area is larger, and the stability of the bed frame 1 after unfolding is better and is less likely to shake; and because a large locking force is not needed when folding, the folding fixing slot 321 can be a sunken groove, so that the engaging portion 333 and the folding fixing slot 321 can form a better limiting and fixing to prevent the support portion 20 from falling after folding, and at the same time, the engaging portion 333 is easily detached from the folding fixing slot 321, so as to facilitate the unfolding of the support portion 20, that is, the unfolding of the bed frame 1.

[0087] ​The engaging portion 333 can be provided with a guide portion 3332. The guide portion 3332 can be a chamfer or a tapered surface, etc. The guide portion 3332 can guide the engaging portion 333 to enter the folding fixing groove 321 and / or the unfolding fixing groove 322. With the guide portion 3332 and the pushing force provided by the reset member 334, the engaging portion 333 can automatically enter the folding fixing groove 321 or the unfolding fixing groove 322 when the guide portion 3332 thereof contacts the folding fixing groove 321 or the unfolding fixing groove 322, or at least the force required to further move the engaging assembly 330 is reduced.

[0088] Referring to Figure 2 and Figure 4 One end of the connecting rod 310 can be pivotally connected to the support portion 20, and one end of the connecting rod 310 can be pivotally connected to the engaging assembly 330. The connecting rod 310 can include a first pivot shaft 311 rotatably provided to the support portion 20, a second pivot shaft 312 rotatably provided to the engaging assembly 330, a first connecting rod portion 313 connecting one end of the first pivot shaft 311 and the second pivot shaft 312, and a second connecting rod portion 314 connecting the other end of the first pivot shaft 311 and the second pivot shaft 312. The first connecting rod portion 313 and the second connecting rod portion 314 can be formed on both sides of the crossbar 320, respectively.

[0089] Optionally, the connecting rod 310 can have only the first connecting rod portion 313 or the second connecting rod portion 314.

[0090] The first connecting rod portion 313 and the second connecting rod portion 314 can be formed in a bent shape and mirror-symmetric to each other. Alternatively, the first connecting rod portion 313 and the second connecting rod portion 314 can be asymmetric to each other. The bent shape can make the connecting rod 310 occupy less space below the frame portion 10, while still keeping the support portion 20 stable relative to the frame portion 10.

[0091] The bending angle of the first connecting rod portion 313 and the second connecting rod portion 314 can be greater than 90°. The bending angle of the first connecting rod portion 313 and the second connecting rod portion 314 can be less than 180°. The bending of the first connecting rod portion 313 and the second connecting rod portion 314 can be a smooth transition.

[0092] Referring to Figure 6 When the support portion 20 is folded, the first connecting rod portion 313 and the second connecting rod portion 314 can be partially located above the crossbar 320.

[0093] Referring to Figures 8-14 The crossbar 320 can be formed with a recess, such as an upper recess 323 (see Figure 14) and a lower recess 324. The upper recess 323 and the lower recess 324 are formed in the length direction of the crossbar 320 at positions corresponding to the folding fixing groove 321 and / or the unfolding fixing groove 322. Specifically, the upper recess 323 and the lower recess 324 can be formed as spherical recesses, and the center points of the upper recess 323 or the lower recess 324 can be biased to one side of the folding fixing groove 321 or the unfolding fixing groove 322. Correspondingly, the sliding sleeve 331 can be formed with an elastically deformable portion 336. The sliding sleeve 331 can be provided with an upper protrusion 337 and a lower protrusion 338 (see Figure 14 ) that cooperate with the upper recess 323 and the lower recess 324. The upper protrusion 337 and the lower protrusion 338 can be provided on the inner surface of the elastically deformable portion 336 facing the crossbar 320. When the engaging assembly 330 passes through the upper recess 323 and the lower recess 324, the upper protrusion 337 and the lower protrusion 338 on the elastically deformable portion 336 can enter the upper recess 323 and the lower recess 324 due to the elasticity of the elastically deformable portion 336, so that a certain resistance is generated when the engaging assembly 330 is further moved, thereby prompting the operator that the folding fixing groove 321 or the unfolding fixing groove 322 is being approached. When the upper protrusion 337 and the lower protrusion 338 of the elastically deformable portion 336 completely enter the upper recess 323 and the lower recess 324, the engaging portion 333 is just aligned with the folding fixing groove 321 or the unfolding fixing groove 322. The crossbar 320 can only have one of the upper recess 323 and the lower recess 324. Correspondingly, the sliding sleeve 331 can only be provided with one of the upper protrusion 337 and the lower protrusion 338. The upper recess 323 and the lower recess 324 can be provided as one, two or more, so as to optionally correspond to the folding fixing groove 321, the unfolding fixing groove 322 or other fixing grooves. The upper recess 323 or the lower recess 324 can be formed as a circle, an ellipse, a square or the like.

[0094] In another embodiment (not shown in the drawings), the upper recess 323 and the lower recess 324 can be formed on the elastically deformable portion 336, and the upper protrusion 337 and the lower protrusion 338 can be formed on the crossbar 320. That is, the upper recess 323 and the lower recess 324 and the upper protrusion 337 and the lower protrusion 338 in the present embodiment are just exchanged with those in the previous embodiment.

[0095] It can be understood that the positions of the folding fixing groove 321, the unfolding fixing groove 322 or other fixing grooves are prompted by the recesses 323, 324 and the protrusions 337, 338 on the crossbar 320 and the elastically deformable portion 336, so that the positions can still be conveniently determined in the case that the operator cannot directly observe the positions of the folding fixing groove 321, the unfolding fixing groove 322 or other fixing grooves by vision. The positions of the protrusions 337, 338 and the recesses 323, 324 can be exchanged.

[0096] Referring to Figures 11 to 14 The sliding sleeve 331 can include an upper housing 3311 and a lower housing 3312 that cooperate with each other. The upper housing 3311 and / or the lower housing 3312 can be provided with an elastically deformed portion 336. The elastically deformed portion 336 can be provided on the upper housing 3311 and / or the lower housing 3312. That is, the protrusions 337, 338 that cooperate with the recesses 323, 324 of the cross bar 320 can be provided on the elastically deformed portion 336 of the upper housing 3311 and the lower housing 3312. When the protrusions 337, 338 are provided on the upper housing 3311 and the lower housing 3312, the cross bar 320 can be correspondingly provided with the recesses 323, 324 on the upper side and the lower side, respectively. In another embodiment (not shown), when the recesses 323, 324 are provided on the upper housing 3311 and the lower housing 3312, the cross bar 320 can be correspondingly provided with the protrusions 337, 338 on the upper side and the lower side, respectively.

[0097] Referring to Figure 6 The horizontal height of both ends of the cross bar 320 can be greater than the horizontal height of the middle portion of the cross bar 320. In this way, when the support portion 20 is collapsed, the first link portion 313 and the portion of the support portion 20 that receives the first link portion 313 do not interfere with each other with respect to the cross bar 320, thereby enabling the support portion 20 to be collapsed to a substantially horizontal position.

[0098] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0099] While the application has been described with reference to exemplary embodiments, the description is illustrative of the application and not a limitation thereof. The application is capable of many variations in the details of implementation that can be derived from the description and the accompanying drawings without departing from the spirit and scope of the application. In its broadest form, the application is defined in the claims.

Claims

1. A bed frame folding mechanism for a bed frame, said bed frame comprising a frame portion and a support portion for supporting said bed frame on a support plane, said support portion comprising a support leg in contact with the support plane and a support bar connected between said support leg and said frame portion, characterized in that, The bed frame folding mechanism comprises: a crossbar positioned below the frame portion; a link having a first end pivotally connected to the support portion; a clamping assembly sleeved on the crossbar, wherein a second end of the link opposite to the first end is pivotally connected to the clamping assembly, and the clamping assembly can be manipulated to fix the clamping assembly with the crossbar or to make the clamping assembly as a whole slide relative to the crossbar.

2. The bed frame collapse mechanism of claim 1, wherein, The clamping assembly can be fixed with the crossbar at at least two positions.

3. The bed frame collapse mechanism of claim 1, wherein, The support portion of the bed frame can be pivoted relative to the frame portion between an unfolded position and a folded position, the crossbar is formed with a folding fixing groove and an unfolding fixing groove, the clamping assembly is fixed in the unfolding fixing groove when the support portion is in the unfolded position, and the clamping assembly is fixed in the folding fixing groove when the support portion is in the folded position.

4. The bed frame collapse mechanism of claim 3, wherein, The clamping assembly comprises: a sliding sleeve formed as an outer shell of the clamping assembly; a release button at least partially exposed to the outside of the sliding sleeve and capable of being actuated; a clamping portion displaced in a first direction in response to the release button being actuated; a restoring member applying a force in a second direction opposite to the first direction to the clamping portion, so that the restoring member tends to displace the clamping portion in the second direction when the release button is not actuated.

5. The bed frame collapse mechanism of claim 4, wherein, The peripheral dimension of the clamping portion corresponds to the dimension of the unfolding fixing groove.

6. The bed frame collapse mechanism of claim 5, wherein, The clamping portion is tightly fitted with the unfolding fixing groove.

7. The bed frame collapse mechanism of claim 4, wherein, The release button and the clamping portion are formed on both sides of the crossbar, and the clamping portion can extend into the folding fixing groove and the unfolding fixing groove.

8. The bed frame collapse mechanism of claim 7, wherein, The clamping assembly has one or two restoring members.

9. The bed frame collapse mechanism of claim 4, wherein, The first direction is a direction away from the crossbar, and the second direction is a direction close to the crossbar.

10. The bed frame collapse mechanism of claim 4, wherein, A guide portion is provided on the clamping portion, and the guide portion can guide the clamping portion to enter the folding fixing groove and / or the unfolding fixing groove.

11. The bed frame collapse mechanism of claim 4, wherein, A recess is formed on the crossbar, the recess is formed at a position corresponding to the folding fixing groove and / or the unfolding fixing groove in the length direction of the crossbar, a protrusion is provided on the sliding sleeve and matched with the recess; or a protrusion is formed on the crossbar, the protrusion is formed at a position corresponding to the folding fixing groove and / or the unfolding fixing groove in the length direction of the crossbar, and a recess is provided on the sliding sleeve and matched with the protrusion.

12. The bed frame collapse mechanism of claim 11, wherein, In the case that the recess is formed on the crossbar, an elastically deformable portion is formed on the sliding sleeve, and the protrusion is arranged on the inner surface of the elastically deformable portion; or in the case that the protrusion is formed on the crossbar, an elastically deformable portion is formed on the sliding sleeve, and the recess is arranged on the inner surface of the elastically deformable portion.

13. The bed frame collapse mechanism of claim 12, wherein, The sliding sleeve comprises an upper shell and a lower shell matched with each other, and the elastically deformable portion is arranged on the upper shell and / or the lower shell.

14. The bed frame collapse mechanism of claim 1, wherein, The link comprises: a first pivot shaft rotatably arranged to the support portion; a second pivot shaft rotatably arranged to the clamping assembly; a first link portion connecting one end of the first pivot shaft and the second pivot shaft; and a second link portion connecting the other end of the first pivot shaft and the second pivot shaft. a second link part connecting the other end of the second pivot shaft, wherein the first link part and the second link part are respectively formed on two sides of the crossbar.

15. The bed frame collapse mechanism of claim 14, wherein, The first link part and the second link part are formed in a bent shape and are mirror-symmetric to each other.

16. The bed frame collapse mechanism of claim 15, wherein, The first link part and the second link part are formed in a bent angle greater than 90°.

17. The bed frame collapse mechanism of claim 1, wherein, The horizontal height of the two ends of the crossbar is greater than the horizontal height of the middle part of the crossbar.

18. A bed frame, characterized by The bed frame comprises a frame part, a support part, and the bed frame folding mechanism as claimed in any one of claims 1 to 17.

19. The bed frame of claim 18, wherein, The bed frame comprises two support parts, the bed frame folding mechanism comprises two link parts and two clamping assemblies, and the opposite two sides of the crossbar are respectively formed with folding fixing grooves and unfolding fixing grooves.

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