Frame folding mechanism and bed frame

Abstract

The present invention provides a frame folding mechanism used in a bed frame. The bed frame comprises a frame portion and a support member. The frame folding mechanism comprises a horizontal bar, a connecting bar, and a locking assembly. The horizontal bar is located at the bottom of the frame portion, and the first end of the connecting bar is pivotally connected to the support member. The locking assembly is sleeved to the horizontal bar. Here, the second end of the connecting bar, which is opposite to the first end, is pivotally connected to the locking assembly. The locking assembly can be operated to fix the locking assembly to the horizontal bar or to slide the locking assembly relative to the horizontal bar. The frame folding mechanism of the present invention has a stable structure and is resistant to shaking during use.

Description

Technology Field

[0001] The present invention relates to the field of baby beds, and in particular to a frame folding mechanism and a bed frame having a frame folding mechanism. Background Technology

[0002] A crib is a baby product that allows the baby to rest and is convenient for caregivers to look after the child. Currently available crib frames with foldable support legs tend to have shaky legs when unfolded, resulting in insufficient stability and a commonly observed decline in user experience. The problem to be solved

[0003] The objective of the present invention is to provide a frame folding mechanism that stabilizes the bed frame and prevents it from shaking during use.

[0004] Another objective of the present invention is to provide a frame folding mechanism that has high structural reliability and is easy to operate.

[0005] Another objective of the present invention is to provide a frame folding mechanism capable of mitigating or eliminating at least one of the aforementioned defects.

[0006] Another objective of the present invention is to provide a bed frame comprising the frame folding mechanism described above. means of solving the problem

[0007] To realize the above objective, the present invention provides a frame folding mechanism used in a bed frame comprising a frame portion and a support portion, wherein the frame folding mechanism comprises a horizontal bar, a connecting bar, and a locking assembly, wherein the horizontal bar is located at the bottom of the frame portion, the first end of the connecting bar is pivotally connected to the support portion, the locking assembly is sleeved to the horizontal bar, and the second end of the connecting bar, which is opposite to the first end, is pivotally connected to the locking assembly, and the locking assembly can be operated to fix the locking assembly to the horizontal bar or slide the locking assembly relative to the horizontal bar.

[0008] In one embodiment, the catch assembly can be fixed to the crossbar at least two positions.

[0009] In one embodiment, the support member of the bed frame can pivot between an unfolded position and a folded position with respect to the frame member, and a fold fixing groove and an unfolding fixing groove are formed in the horizontal bar, and when the support member is in the unfolded position, the locking assembly is fixed to the unfolding fixing groove, and when the support member is in the folded position, the locking assembly is fixed to the fold fixing groove.

[0010] In one embodiment, the locking assembly includes a sliding sleeve, an unlock button, a locking part, and a reset member, the sliding sleeve is formed as a housing of the locking assembly, and at least a portion of the unlock button is exposed to the outside of the sliding sleeve and is operable, the locking part is displaced in a first direction in response to the operation of the unlock button, and the reset member applies a force in a second direction opposite to the first direction to the locking part, so that when the unlock button is not operated, the reset member tends to displace the locking part along the second direction.

[0011] In one embodiment, the external size of the locking portion corresponds to the size of the unfolding fixing groove.

[0012] In one embodiment, the catch is closely coupled with the unfolding fixing groove.

[0013] In one embodiment, the locking assembly includes an unlock button and a locking part, the unlock button and the locking part are formed on both sides of the horizontal bar, and the horizontal bar includes a folding fixing groove and an unfolding fixing groove corresponding to the locking part.

[0014] In one embodiment, the locking assembly has one or two reset members.

[0015] In one embodiment, the first direction is a direction away from the horizontal bar, and the second direction is a direction closer to the horizontal bar.

[0016] In one embodiment, a guide portion is provided on the catch portion, and the guide portion can guide the catch portion to enter at least one of the folding fixing groove and the unfolding fixing groove.

[0017] In one embodiment, a concave portion is formed in the horizontal bar, and in the longitudinal direction of the horizontal bar, the concave portion is formed at a position corresponding to at least one of the folding fixing groove and the unfolding fixing groove, and the sliding sleeve is provided with a protrusion that cooperates with the concave portion, or a protrusion is formed in the horizontal bar, and in the longitudinal direction of the horizontal bar, the protrusion is formed at a position corresponding to at least one of the folding fixing groove and the unfolding fixing groove, and the sliding sleeve is provided with a concave portion that cooperates with the protrusion.

[0018] In one embodiment, when the concave portion is formed in the horizontal bar, the elastic deformation portion is formed in the sliding sleeve and the protrusion is provided on the inner surface of the elastic deformation portion, or when the protrusion is formed in the horizontal bar, the elastic deformation portion is formed in the sliding sleeve and the concave portion is provided on the inner surface of the elastic deformation portion.

[0019] In one embodiment, the sliding sleeve includes an upper case and a lower case that cooperate with each other, and at least one of the upper case and the lower case is provided with an elastic deformation portion.

[0020] In one embodiment, the connecting rod comprises a first pivot shaft, a second pivot shaft, a first connecting rod portion, and a second connecting rod portion, wherein the first pivot shaft is rotatably provided on the support portion, the second pivot shaft is rotatably provided on the locking assembly, the first connecting rod portion is connected to one end of the first pivot shaft and one end of the second pivot shaft, the second connecting rod portion is connected to the other end of the first pivot shaft and the other end of the second pivot shaft, and the first connecting rod portion and the second connecting rod portion are each formed on both sides of the horizontal rod.

[0021] In one embodiment, the first connecting rod and the second connecting rod are formed in a bent shape and are also mirror-symmetric with respect to each other.

[0022] In one embodiment, the bending angle formed by the first connecting rod and the second connecting rod is greater than 90°.

[0023] In one embodiment, the horizontal height at both ends of the horizontal bar is greater than the horizontal height at the middle part of the horizontal bar.

[0024] Another aspect of the present invention provides a bed frame comprising a frame portion, a support portion, and a frame folding mechanism.

[0025] In one embodiment, the bed frame includes two support members, and the frame folding mechanism includes two connecting rods and two locking assemblies, and both opposing sides of the horizontal rods have folding fixing grooves and unfolding fixing grooves formed therein. Effects of the invention

[0026] With the frame folding mechanism of the present invention, the structure of the bed frame is stabilized and prevented from shaking when in use, and the connection between the frame part and the support part of the bed frame is reliable, tight, and free from undesirable gaps, while the folding operation of the bed frame is simple, convenient, saves labor, and reduces the possibility of misoperation. Brief explanation of the drawing

[0027] The various objects, features, and advantages of the present invention will become more apparent by considering the following detailed description of preferred embodiments of the invention together with the drawings. The drawings are merely exemplary illustrations of the invention and are not necessarily drawn in proportion. Identical reference numerals in the drawings always indicate identical or similar parts. FIG. 1 is a perspective view of the bed frame of the present invention. Figure 2 is an enlarged view of a part of Figure 1. FIG. 3 is another perspective view of the bed frame of the present invention. Figure 4 is an enlarged view of a part of Figure 3. FIG. 5 is a perspective view of the support portion of the bed frame of the present invention in a folded position. Figure 6 is an enlarged view of a part of Figure 5. FIG. 7 is a cross-sectional perspective view of a schematic part of the frame folding mechanism of the present invention. FIG. 8 is a cross-sectional perspective view of another schematic part of the frame folding mechanism of the present invention. FIG. 9 is a cross-sectional perspective view of another schematic part of the frame folding mechanism of the present invention. FIG. 10 is a cross-sectional perspective view of another schematic part of the frame folding mechanism of the present invention. FIG. 11 is an exploded perspective view of one embodiment of the locking assembly of the frame folding mechanism of the present invention. FIG. 12 is an exploded perspective view at a different angle of one embodiment of the locking assembly of the frame folding mechanism of the present invention. FIG. 13 is a bottom perspective view of some elements of another embodiment of the frame folding mechanism of the present invention. FIG. 14 is a cross-sectional view of some elements of another embodiment of the frame folding mechanism of the present invention. Specific details for implementing the invention

[0028] To further explain the principles and structure of the present invention, preferred embodiments of the present invention are described in detail based on the accompanying drawings; however, said embodiments are used only for explanation and interpretation and are not to limit the scope of patent protection of the present invention.

[0029] The terms used in this specification are intended to describe specific embodiments only and are not intended to limit the invention. The singular forms of "one," "above," and "corresponding" used in the invention and the appended claims are intended to include the plural forms unless the context clearly indicates a different meaning. The term "and / or" used in this specification means any or all possible combination of one or more of the associated enumerated items and should be understood to include them. Terms indicating direction, such as "first direction," "second direction," etc., used in the invention do not have a limiting meaning and are used for distinction purposes.

[0030] It is necessary to provide a lockable, stable, and non-shaking baby crib frame.

[0031] Referring to FIGS. 1, 2 and 5, the bed frame (1) of the present invention is foldable and allows a baby or child to sleep or play when in use. The bed frame (1) may include a frame portion (10) and a support portion (20). The frame portion (10) may be used to provide an activity space for a baby or child. There may be two support portions (20). Two support portions (20) may be installed on the undersides of both ends along the length of the frame portion (10). The present invention does not limit the number of support portions (20). The support portions (20) may pivot with respect to the frame portion (10) between an unfolded position (as shown in FIG. 1) and a folded position. The folded position may be a pivoted position where all support portions (20) are brought closer together in the horizontal direction. In the folded position, the bed frame (1) may have a smaller volume to facilitate storage and transport.

[0032] The frame folding mechanism (30) can be connected to the frame part (10) and the support part (20) respectively so that the support part (20) can be operated to facilitate folding and to firmly maintain the support part (20) in the unfolded position or the folded position.

[0033] The frame folding mechanism (30) includes a horizontal bar (320), a connecting bar (310), and a locking assembly (330). The horizontal bar (320) is positioned at the bottom of the frame portion (10). The right end (unlimited) of the connecting bar (310) (see FIG. 2) is pivotally connected to the support portion (20), and the locking assembly (330) is sleeved to the horizontal bar (320). The left end (unlimited) of the connecting bar (310) is pivotally connected to the locking assembly (330). The locking assembly (330) may be fixed to the horizontal bar (320), or the locking assembly (330) may operate to slide relative to the horizontal bar (320).

[0034] A horizontal bar (320) can be installed along the longitudinal direction (left-right direction in FIG. 1) of the frame part (10) at the lower center of the lower surface of the frame part (10). The horizontal bar (320) may have a hollow structure. Both ends of the horizontal bar (320) may be connected to the frame part (10) or to a location where the frame part (10) and the support part (20) are joined, and optionally, both ends of the horizontal bar (320) may be fixed to a location where the frame part (10) or the frame part (10) and the support part (20) are connected. While the support part (20) pivots, the horizontal bar (320) may remain in a stationary state.

[0035] A folding fixing groove (321) and an unfolding fixing groove (322) (as shown in FIGS. 8 and 9) may be formed in the horizontal bar (320). When the support member (20) is in the unfolded position, the locking assembly (330) may be fixed to the unfolding fixing groove (322) so that the frame member (10) is stably supported without shaking, and when the support member (20) is in the folded position, the locking assembly (330) may be fixed to the folding fixing groove (321) so that the support member (20) is maintained in the folded position and does not unfold undesirably.

[0036] Optionally, the horizontal bar (320) may be provided with a fixing groove other than the folding fixing groove (321) and the unfolding fixing groove (322) so that the support member (20) can be maintained at a desired angle or position as needed.

[0037] In this embodiment, the horizontal bar (320) has one folding fixing groove (321) and one unfolding fixing groove (322) on each side. The present invention does not limit the number of folding fixing grooves (321) and unfolding fixing grooves (322). Correspondingly, in this embodiment, the frame folding mechanism (30) may have two connecting rods (310) and two locking assemblies (330). The present invention does not limit the number of connecting rods (310) and locking assemblies (330). Optionally, the horizontal bar (320) may have a different number of folding fixing grooves (321) and unfolding fixing grooves (322), and the frame folding mechanism (30) may have a different number of connecting rods (310). Optionally, the number of folding fixing grooves (321) and unfolding fixing grooves (322) corresponds to the number of connecting rods (310) and the number of locking assemblies (330). In this embodiment, the frame folding mechanism (30) has one horizontal rod (320). Optionally, the frame folding mechanism (30) may have another number of horizontal rods (320) that can be arranged parallel to each other or at an angle.

[0038] As illustrated in FIGS. 2, 4, 6 through 8, the locking assembly (330) may include a sliding sleeve (331), an unlock button (332), a locking part (333), and a reset member (334). The sliding sleeve (331) is formed as a housing of the locking assembly (330), and the unlock button (332) is at least partially exposed to the outside of the sliding sleeve (331) and operable. The locking part (333) is displaced (or moves a certain distance) in a direction away from the horizontal bar (320) (first direction) in response to the operation of the unlock button (332), and the reset member (334) tends to displace the locking part (333) toward the horizontal bar (320) (second direction) when the unlock button (332) is not operated. Apply a constant force in the direction.

[0039] The sliding sleeve (331) can be formed in a relatively flat, approximately cuboid shape so as to be convenient to grip and operate by hand. There may be two unlock buttons (332) installed on each side of the sliding sleeve (331) to facilitate operation by pressing inward (toward the horizontal bar (320)) with fingers (e.g., thumb and index finger). Two unlock buttons (332) can achieve more stable fixation, and the two unlock buttons (332) can be arranged symmetrically. There may be different numbers of unlock buttons (332), and the number of unlock buttons (332) is not limited in the present invention.

[0040] One side of the locking part (333) may have a receiving groove (3331) as shown in FIGS. 7 to 10. A lever member (335) may be installed between the unlock button (332) and the receiving groove (3331), and accordingly, when the reset member (334) is pressed inward (as shown by the arrow in FIG. 7), the lever member (335) pushes the locking part (333) outward through the receiving groove (3331).

[0041] The reset member (334) may be formed as an elastic member as illustrated in FIGS. 7 to 10. 334' in FIG. 10 is the shape of the reset member (334) in its natural state. Accordingly, when the reset member (334) is installed in the receiving groove (3331) of the two locking parts (333), the reset member (334) becomes elastically deformed and can apply a certain inward force to the two locking parts (333). The number of locking parts (333) may vary, and the present invention does not limit the number of locking parts (333).

[0042] In another embodiment, the reset member (334) may be formed as a spring provided between the locking part (333) and the inner wall of the sliding sleeve (331). The reset member (334) may also be formed in other shapes as long as it can apply an inward pushing force to the locking part (333).

[0043] In another embodiment, the locking assembly (330) may have one unlock button (332) and one locking part (333). The reset member (334) may be set to one, two, or multiple as needed.

[0044] The external size of the locking part (333) can correspond to the size of the folding fixing groove (321) and the unfolding fixing groove (322) so that the locking part (333) can accurately enter and be maintained in the folding fixing groove (321) or the unfolding fixing groove (322). When the locking part (333) enters the folding fixing groove (321) or the unfolding fixing groove (322), the gap between the locking part (333) and the folding fixing groove (321) or the unfolding fixing groove (322) is as small as possible or forms a close connection. Because the sliding sleeve (331) is not easily slid due to the elastic restoring force of the reset member (334), the bed frame (1) becomes more stable and does not shake when unfolded. More specifically, the unfolding fixing groove (322) is a through hole, and the catch portion (333) is directly hooked into the through hole to increase the catch area between the catch portion (333) and the unfolding fixing groove (322) so that the positional determination of the sliding sleeve (331) and the horizontal bar (320) is more certain, that is, so that the frame portion (10) and the support portion (20) do not move relatively, thereby ensuring the overall stability of the bed frame (1) after unfolding. In particular, under the action of the reset member (334), the catch portion (333) is hooked more deeply into the through hole, so that the catch area is larger, and the stability after unfolding the bed frame (1) is better and does not move more. Meanwhile, since a large catch force is not required when folding, the folding fixing groove (321) can be made into a sinking groove, and thus a good positional determination can be formed between the catch portion (333) and the folding fixing groove (321), so that the support portion (20) At the same time, since the locking part (333) is easy to detach from the folding fixing groove (321) while preventing falling after folding, it is possible to facilitate the unfolding of the support part (20), that is, the unfolding of the bed frame (1).

[0045] A guide portion (3332) may be installed in the locking portion (333). The guide portion (3332) may be a chamfer or a tapered surface, etc. The guide portion (3332) may guide the locking portion (333) to the folding fixing groove (321) and / or the unfolding fixing groove (322). Due to the pushing force from the guide portion (3332) and the reset member (334), the locking portion (333) may automatically enter the folding fixing groove (321) or the unfolding fixing groove (322) when the guide portion (3332) contacts the folding fixing groove (321) or the unfolding fixing groove (322), or at least reduce the force required to move the locking assembly (330) further.

[0046] Referring to FIGS. 2 and 4, one end of the connecting rod (310) is pivotally connected to the support member (20), and the other end of the connecting rod (310) is pivotally connected to the locking assembly (330). The connecting rod (310) has a first pivot shaft (311) rotatably provided in the locking assembly (330), a second pivot shaft (312) rotatably provided in the support member (20), a first connecting rod part (313) connecting one end of the first pivot shaft (311) and the second pivot shaft (312), and a second connecting rod part (314) connecting the other end of the first pivot shaft (311) and the second pivot shaft (312). The first connecting rod part (313) and the second connecting rod part (314) can each be formed on both sides of the horizontal rod (320).

[0047] Optionally, the connecting rod (310) may have only the first connecting rod portion (313) or only the second connecting rod portion (314).

[0048] The first connecting rod portion (313) and the second connecting rod portion (314) are formed in a bent shape and may also be mirror-symmetric with respect to each other. Optionally, the first connecting rod portion (313) and the second connecting rod portion (314) may be asymmetric with respect to each other. Due to the bent shape, the connecting rod (310) may occupy less space below the frame portion (10) and simultaneously stabilize the support portion (20) with respect to the frame portion (10).

[0049] The bending angle formed by the first connecting rod (313) and the second connecting rod (314) may be greater than 90°. The bending angle formed by the first connecting rod (313) and the second connecting rod (314) may be less than 180°. The bending formed by the first connecting rod (313) and the second connecting rod (314) may be transitioned smoothly.

[0050] Referring to FIG. 6, when the support member (20) is folded, a portion of the first connecting rod member (313) and the second connecting rod member (314) may be located above the horizontal rod (320).

[0051] Referring to FIGS. 8 through 14, a concave portion, such as an upper concave portion (323) (see FIG. 14) and a lower concave portion (324), may be formed in the horizontal bar (320). In the longitudinal direction of the horizontal bar (320), the upper concave portion (323) and the lower concave portion (324) are formed at positions corresponding to the folding fixing groove (321) and / or the unfolding fixing groove (322). Specifically, the upper concave portion (323) and the lower concave portion (324) may be formed as spherical concave portions, and the center point of the upper concave portion (323) or the lower concave portion (324) may be offset toward one side of the folding fixing groove (321) or the unfolding fixing groove (322). Correspondingly, an elastic deformation portion (336) may be formed in the sliding sleeve (331). The sliding sleeve (331) may be provided with an upper protrusion (337) and a lower protrusion (338) (see FIG. 14) that cooperate with the upper concave portion (323) and the lower concave portion (324). The upper protrusion (337) and the lower protrusion (338) may be provided on the inner surface where the elastic deformation portion (336) faces the horizontal bar (320). When the locking assembly (330) passes through the upper recess (323) and the lower recess (324), the upper protrusion (337) and the lower protrusion (338) of the elastic deformation part (336) can enter into the upper recess (323) and the lower recess (324) due to the elasticity of the elastic deformation part (336), thereby generating a constant resistance force when the locking assembly (330) is moved further, thereby indicating to the operator that it is approaching the folding fixing groove (321) or the unfolding fixing groove (322). When the upper protrusion (337) and the lower protrusion (338) of the elastic deformation part (336) have completely entered the upper recess (323) and the lower recess (324), the locking part (333) is accurately aligned with the folding fixing groove (321) or the unfolding fixing groove (322). The horizontal bar (320) may have only one of the upper concave portion (323) and the lower concave portion (324). Correspondingly, the sliding sleeve (331) may have only one of the upper protrusion (337) and the lower protrusion (338).The upper concave portion (323) and the lower concave portion (324) may each be installed as one, two, or multiple portions, and accordingly, optionally correspond to a folding fixing groove (321), an unfolding fixing groove (322), or other fixing grooves. The upper concave portion (323) or the lower concave portion (324) may be formed in a circular, elongated, rectangular shape, etc.

[0052] In another embodiment (not shown), the upper concave portion (323) and the lower concave portion (324) may be formed in the elastic deformation portion (336), and the upper protrusion (337) and the lower protrusion (338) may be formed in the horizontal bar (320). That is, the upper concave portion (323) and the lower concave portion (324) and the upper protrusion (337) and the lower protrusion (338) of this embodiment are interchanged with those of the previous embodiment.

[0053] Additionally, the location of the folding fixing groove (321), unfolding fixing groove (322), or other fixing grooves is realized by the concave portions (323, 324) and protrusions (337, 338) of the horizontal bar (320) and the elastic deformation portion (336), and accordingly, even if the operator cannot directly observe the location of the folding fixing groove (321), unfolding fixing groove (322), or other fixing grooves by sight, the location can still be easily identified. The locations where the protrusions (337, 338) and the concave portions (323, 324) are located are interchangeable.

[0054] Referring to FIGS. 11 through 14, the sliding sleeve (331) may include an upper case (3311) and a lower case (3312) that cooperate with each other. An elastic deformation part (336) may be installed in the upper case (3311) and / or the lower case (3312). The elastic deformation part (336) may be installed in the upper case (3311) and / or the lower case (3312). That is, a protrusion (337, 338) that cooperates with the concave part (323, 324) of the horizontal bar (320) may be installed in the elastic deformation part (336) of the upper case (3311) and the lower case (3312). When protrusions (337, 338) are installed in the upper case (3311) and the lower case (3312), the horizontal bar (320) may have corresponding concave portions (323, 324) installed on the upper and lower sides. In another embodiment (not shown), when concave portions (323, 324) are installed in the upper case (3311) and the lower case (3312), the horizontal bar (320) may have corresponding protrusions (337, 338) installed on the upper and lower sides.

[0055] Referring to FIG. 6, the horizontal height of both ends of the horizontal bar (320) can be made greater than the horizontal height of the middle part of the horizontal bar (320). In this way, when the support part (20) is folded, the first connecting bar part (313) and the part of the support part (20) that accommodates the first connecting bar part (313) do not interfere with the horizontal bar (320), and furthermore, the support part (20) can be folded to a basically horizontal position.

[0056] Those skilled in the art will readily conceive of other embodiments of the invention after practicing the invention disclosed herein by taking the specification into consideration. The present invention is intended to cover any modification, use, or adaptive variation of the invention, including any known common sense or conventional technical means in the art that are not disclosed herein in accordance with the general principles of the present disclosure. The specification and embodiments are to be regarded merely as examples, and the true scope and spirit of the invention are indicated by the claims of the invention.

[0057] Although this specification is described by enumeration with reference to exemplary embodiments, the terms used are descriptive and illustrative rather than restrictive. Since the invention can be specifically implemented in various forms without departing from the spirit and substance of the invention, such embodiments are not limited to the details described above but should be interpreted most broadly within the scope defined in the claims. Therefore, it should be understood that all variations included within the claims or their equivalents are included in the claims. Explanation of the symbols

[0058] Bed frame (1) frame part (10) Support part (20) frame folding mechanism (30) Connecting rod (310) first pivot axis (311) Second pivot shaft (312) first connecting rod part (313) Second connecting rod (313) horizontal rod (320) Folding fixing groove (321) unfolding fixing groove (322) Upper concave portion (323) Lower concave portion (323) Sliding sleeve (331) of the catch assembly (330) Upper case (3311) Lower case (3312) Unlock button (332) locking part (333) Receiving home (3331) guide section (3332) Reset component (333, 333') lever component (335) Elastic deformation part (336) upper protrusion (337) lower protrusion (338)

Claims

Claim 1 A frame folding mechanism used in a bed frame comprising a frame portion and a support portion, wherein the frame folding mechanism comprises a horizontal bar, a connecting bar, and a locking assembly, wherein the horizontal bar is located below the frame portion, the first end of the connecting bar is pivotally connected to the support portion, the locking assembly is sleeved to the horizontal bar, and the second end of the connecting bar opposite to the first end is pivotally connected to the locking assembly, and the locking assembly can be operated to fix the locking assembly to the horizontal bar or slide the locking assembly relative to the horizontal bar, wherein the locking assembly comprises an unlock button, a locking portion, and a reset member, wherein the locking portion is displaced in a first direction in response to the operation of the unlock button, and the reset member applies a force in a second direction opposite to the first direction to the locking portion, such that when the unlock button is not operated, the reset member tends to displace the locking portion along the second direction. Claim 2 A frame folding mechanism according to claim 1, characterized in that the locking assembly can be fixed to the horizontal bar at least two positions. Claim 3 A frame folding mechanism according to claim 1, wherein the support member of the bed frame can pivot between an unfolded position and a folded position with respect to the frame member, and a folding fixing groove and an unfolding fixing groove are formed in the horizontal bar, and when the support member is in the unfolded position, the locking assembly is fixed to the unfolding fixing groove, and when the support member is in the folded position, the locking assembly is fixed to the folding fixing groove. Claim 4 A frame folding mechanism according to paragraph 3, wherein the locking assembly includes a sliding sleeve, the sliding sleeve is formed as a housing of the locking assembly, and the unlock button is operable with at least a portion exposed to the outside of the sliding sleeve. Claim 5 A frame folding mechanism according to claim 4, characterized in that the external size of the locking part corresponds to the size of the unfolding fixing groove. Claim 6 A frame folding mechanism according to claim 5, characterized in that the above-mentioned locking part closely cooperates with the above-mentioned unfolding fixing groove. Claim 7 A frame folding mechanism according to claim 4, wherein the locking assembly includes an unlock button and a locking part, the unlock button and the locking part are formed on both sides of the horizontal bar, and the horizontal bar includes a folding fixing groove and an unfolding fixing groove corresponding to the locking part. Claim 8 A frame folding mechanism according to claim 7, characterized in that the locking assembly has one or two reset members. Claim 9 A frame folding mechanism according to claim 4, characterized in that the first direction is a direction away from the horizontal bar, and the second direction is a direction approaching the horizontal bar. Claim 10 A frame folding mechanism according to claim 4, wherein the above-mentioned locking part is provided with a guide part, and the above-mentioned locking part is capable of guiding the above-mentioned locking part to enter at least one of the above-mentioned folding fixing groove and the above-mentioned unfolding fixing groove. Claim 11 A frame folding mechanism according to claim 4, wherein a concave portion is formed in the horizontal bar, and in the longitudinal direction of the horizontal bar, the concave portion is formed at a position corresponding to at least one of the folding fixing groove and the unfolding fixing groove, and the sliding sleeve is provided with a protrusion that cooperates with the concave portion, or wherein a protrusion is formed in the horizontal bar, and in the longitudinal direction of the horizontal bar, the protrusion is formed at a position corresponding to at least one of the folding fixing groove and the unfolding fixing groove, and the sliding sleeve is provided with a concave portion that cooperates with the protrusion. Claim 12 A frame folding mechanism according to claim 11, wherein when the concave portion is formed in the horizontal bar, an elastic deformation portion is formed in the sliding sleeve and the protrusion is provided on the inner surface of the elastic deformation portion, or when the protrusion is formed in the horizontal bar, an elastic deformation portion is formed in the sliding sleeve and the concave portion is provided on the inner surface of the elastic deformation portion. Claim 13 A frame folding mechanism according to claim 12, wherein the sliding sleeve comprises an upper case and a lower case that cooperate with each other, and at least one of the upper case and the lower case is provided with an elastic deformation part. Claim 14 A frame folding mechanism according to claim 1, wherein the connecting rod comprises a first pivot shaft, a second pivot shaft, a first connecting rod portion, and a second connecting rod portion, wherein the first pivot shaft is rotatably provided in the support portion, the second pivot shaft is rotatably provided in the locking assembly, the first connecting rod portion is connected to one end of the first pivot shaft and one end of the second pivot shaft, the second connecting rod portion is connected to the other end of the first pivot shaft and the other end of the second pivot shaft, and wherein the first connecting rod portion and the second connecting rod portion are each formed on both sides of the horizontal rod. Claim 15 A frame folding mechanism according to claim 14, characterized in that the first connecting rod and the second connecting rod are formed in a bent shape and are mirror-symmetric with respect to each other. Claim 16 A frame folding mechanism according to claim 15, characterized in that the bending angle formed by the first connecting rod and the second connecting rod is greater than 90°. Claim 17 A frame folding mechanism according to claim 1, characterized in that the horizontal height of both ends of the horizontal bar is greater than the horizontal height of the middle part of the horizontal bar. Claim 18 A bed frame characterized by including a frame portion, a support portion, and a frame folding mechanism described in any one of claims 1 to 17. Claim 19 A bed frame according to claim 18, wherein the bed frame comprises two support members, the frame folding mechanism comprises two connecting rods and two locking assemblies, and both opposing sides of the horizontal rods have a folding fixing groove and an unfolding fixing groove formed therein.

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