Bed frame

Abstract

A bed frame (10), comprising: a bed body (100), a support mechanism (200) and limiting mechanisms (300). The support mechanism (200) is configured to support the bed body (100). The support mechanism (200) comprises support rod assemblies (210), and each support rod assembly (210) comprises a first rod member (211) and a second rod member (212). Each support rod assembly (210) is operable to enable relative movement between the corresponding first rod member (211) and second rod member (212), thereby adjusting the length of the support rod assembly (210). Each second rod member (212) has a plurality of gear portions (213), the corresponding first rod member (211) is operably engaged with one of the gear portions (213), and the plurality of gear portions (213) comprise a plurality of first gear portions (213a) and at least one second gear portion (213b). The limiting mechanisms (300) are disposed on the support rod assemblies (210), and are each configured to block each first rod member (211) from moving to a position where same is engaged with the corresponding second gear portion (213b), and each limiting mechanism (300) is operable to allow the first rod member (211) to move to the position where same is engaged with the second gear portion (213b).

Description

bedstead Technical Field

[0001] This application relates to the field of infant and toddler products technology, and in particular to a bed frame. Background Technology

[0002] Most modern cribs and bedside beds feature multi-level adjustment, allowing the support structure to be adjusted and held at any position, including the highest and lowest settings. At the lowest setting, the bed height is minimized, resulting in a smaller packaging volume and advantages for storage and transport. However, at this lowest setting, the crib's height may be too low for everyday use, potentially leading to users easily adjusting the crib too low for daily use. Summary of the Invention

[0003] Therefore, it is necessary to provide a bed frame to address the above problems.

[0004] One aspect of this application provides a bed frame, comprising: a bed body; a support mechanism for supporting the bed body, the support mechanism including a support rod assembly, the support rod assembly including a first rod and a second rod, the support rod assembly being operable to allow relative movement between corresponding first rods and second rods to adjust the length of the corresponding support rod assembly, the second rod having a plurality of stop portions, the first rod being operablely engaged with one of the stop portions, the plurality of stop portions including a plurality of first stop portions and at least one second stop portion; and a limiting mechanism disposed on the support rod assembly for preventing the first rod from moving to engage with the second stop portion, and the limiting mechanism being operable to allow the first rod to move to engage with the second stop portion.

[0005] In one embodiment, the limiting mechanism includes a limiting member movably disposed on one of the first rod and the second rod, and a stop portion disposed on the other of the first rod and the second rod. The limiting member cooperates with the stop portion to prevent the first rod from moving to engage with the second stop portion.

[0006] In one embodiment, at least a portion of the limiting member is operably switchable between an extended position and a retracted position. When in the extended position, the limiting member cooperates with the stop portion to prevent the first rod from moving to engage with the second stop portion. When in the retracted position, the first rod can move to engage with the second stop portion.

[0007] In one embodiment, the limiting member is movably disposed on the second rod, and the stop portion is disposed on the first rod. When in the extended position, at least a portion of the limiting member protrudes from the outer wall of the second rod.

[0008] In one embodiment, the limiting member includes an elastic portion and a limiting protrusion connected to the elastic portion. The elastic portion is connected to the second rod, and the second rod is provided with a limiting hole. The elastic portion tends to cause the limiting protrusion to protrude from the limiting hole from the outer wall of the second rod. The limiting member can be operated to retract the limiting protrusion from the limiting hole.

[0009] In one embodiment, the end of the elastic part away from the limiting protrusion is formed into a V-shaped structure and is engaged with the second rod; or the elastic part is fixed to the second rod.

[0010] In one embodiment, the limiting mechanism further includes a base connected to the second rod, and the elastic part and the limiting protrusion are movably connected to the base.

[0011] In one embodiment, the limiting mechanism further includes a limiting pin, which is movably disposed on the second rod and has a first position and a second position; when the limiting pin is in the first position, the limiting pin is located on the movement path of the elastic part to restrict the limiting protrusion from retracting from the limiting hole; when the limiting pin is in the second position, the limiting pin deviates from the movement path of the elastic part to allow the limiting protrusion to retract from the limiting hole.

[0012] In one embodiment, the limiting mechanism further includes a first reset member that tends to hold the limiting pin in the first position.

[0013] In one embodiment, the limiting mechanism further includes a base connected to the second rod, a portion of the wall of the base forming the elastic portion and the limiting protrusion, the base having a cavity in which the limiting pin is movably disposed.

[0014] In one embodiment, the elastic part is further provided with a blocking part that protrudes into the cavity and is located in the movement path of the limiting pin to restrict the limiting pin from dislodging from the cavity.

[0015] In one embodiment, the first lever is provided with an engagement mechanism adapted to engage with any of the plurality of gear positions to define the relative positions of the first lever and the second lever.

[0016] In one embodiment, the engaging mechanism includes: a mounting base mounted on the first rod; and an engaging member movably disposed on the mounting base and capable of engaging and disengaging with any of the plurality of gear positions.

[0017] In one embodiment, the engaging mechanism further includes a second reset member, which tends to engage the engaging member with any of the plurality of gear positions.

[0018] In one embodiment, the bed frame further includes a release mechanism that drives the engaging member to disengage the engaging member from any of the plurality of positions.

[0019] In one embodiment, the release mechanism includes: a release operation member operably disposed on the first lever and having a release position and a locked position; and a transmission member connected to the release operation member and the engaging member respectively; when the release operation member is operated to switch from the locked position to the release position, the release operation member drives the engaging member to disengage from any of the plurality of gear positions via the transmission member.

[0020] In one embodiment, the engaging member has a pushing portion; the transmission member has an inclined surface; when the transmission member moves along a first direction, the inclined surface pushes against the pushing portion, so that the engaging member moves along a second direction to disengage from any of the plurality of gear positions, the first direction intersecting the second direction.

[0021] In one embodiment, the release mechanism further includes a third reset member that tends to hold the release actuation member in the locked position.

[0022] In one embodiment, the support mechanism includes two support rod assemblies, and the first gear position includes a first lowest gear position and a first highest gear position. When the first rod of one of the support rod assemblies is engaged with the first lowest gear position of the corresponding second rod, and the first rod of the other support rod assembly is engaged with the first highest gear position of the corresponding second rod, the tilt angle of the bed relative to the horizontal plane is less than or equal to a set angle.

[0023] In one embodiment, each of the support rod assemblies can be operated independently to independently adjust the length of each support rod assembly.

[0024] Another aspect of this application provides a bed frame, including a bed body; a support mechanism for supporting the bed body, the support mechanism including a support rod assembly, the support rod assembly including a first rod and a second rod, the support rod assembly being operable to allow relative movement between the corresponding first rod and the second rod to adjust the length of the corresponding support rod assembly, the support rod assembly having a plurality of stop portions, the first rod being operably engaged in one of the stop portions, the plurality of stop portions including a plurality of first stop portions and a plurality of second stop portions, the bed frame being in a first use state when the first rod is engaged in the first stop portion, and the bed frame being in a second use state when the first rod is engaged in the second stop portion.

[0025] In one embodiment, the first lever cannot continuously switch from a state engaged with one of the first gear parts to a state engaged with one of the second gear parts.

[0026] In one embodiment, the first gear position and the second gear position are located on different parts of the support rod assembly.

[0027] In one embodiment, both the first gear position and the second gear position are located on the second lever. The first gear position is arranged along a first straight line, and the second lever is arranged along a second straight line. The first straight line and the second straight line are not collinear.

[0028] In one embodiment, the first straight line is parallel to the second straight line, and the first rod and the second rod are rotatable relative to each other. When the first rod is engaged with one of the first gear positions, the support rod assembly causes the first rod and the second rod to rotate relative to each other, so that the first rod can be engaged with one of the second gear positions.

[0029] In one embodiment, both the first gear position and the second gear position are located on the second lever, and the first gear position and the second gear position are arranged collinearly.

[0030] In one embodiment, the bed frame includes a limiting mechanism disposed on the support rod assembly, the limiting mechanism being used to prevent the first rod from moving to engage with the second stop portion, and the limiting mechanism being operable to allow the first rod to move to engage with the second stop portion.

[0031] In one embodiment, the limiting mechanism includes a limiting member movably disposed on one of the first rod and the second rod, and a stop portion disposed on the other of the first rod and the second rod. The limiting member cooperates with the stop portion to prevent the first rod from moving to engage with the second stop portion.

[0032] In one embodiment, at least a portion of the limiting member is operably switchable between an extended position and a retracted position. When in the extended position, the limiting member cooperates with the stop portion to prevent the first rod from moving to engage with the second stop portion. When in the retracted position, the first rod can move to engage with the second stop portion.

[0033] In one embodiment, the limiting member is movably disposed on the second rod, and the stop portion is disposed on the first rod. When in the extended position, at least a portion of the limiting member protrudes from the outer wall of the second rod.

[0034] In one embodiment, the limiting member includes an elastic portion and a limiting protrusion connected to the elastic portion. The elastic portion is connected to the second rod, and the second rod is provided with a limiting hole. The elastic portion tends to cause the limiting protrusion to protrude from the limiting hole from the outer wall of the second rod. The limiting member can be operated to retract the limiting protrusion from the limiting hole.

[0035] In one embodiment, the end of the elastic part away from the limiting protrusion is formed into a V-shaped structure and is engaged with the second rod; or the elastic part is fixed to the second rod.

[0036] In one embodiment, the limiting mechanism further includes a base connected to the second rod, and the elastic part and the limiting protrusion are movably connected to the base.

[0037] In one embodiment, the limiting mechanism further includes a limiting pin, which is movably disposed on the second rod and has a first position and a second position; when the limiting pin is in the first position, the limiting pin is located on the movement path of the elastic part to restrict the limiting protrusion from retracting from the limiting hole; when the limiting pin is in the second position, the limiting pin deviates from the movement path of the elastic part to allow the limiting protrusion to retract from the limiting hole.

[0038] In one embodiment, the limiting mechanism further includes a first reset member that tends to hold the limiting pin in the first position.

[0039] In one embodiment, the limiting mechanism further includes a base connected to the second rod, a portion of the wall of the base forming the elastic portion and the limiting protrusion, the base having a cavity in which the limiting pin is movably disposed.

[0040] In one embodiment, the elastic part is further provided with a blocking part that protrudes into the cavity and is located in the movement path of the limiting pin to restrict the limiting pin from dislodging from the cavity.

[0041] In one embodiment, the first lever is provided with an engagement mechanism adapted to engage with any of the plurality of gear positions to define the relative positions of the first lever and the second lever.

[0042] In one embodiment, the engaging mechanism includes: a mounting base mounted on the first rod; and an engaging member movably disposed on the mounting base and capable of engaging and disengaging with any of the plurality of gear positions.

[0043] In one embodiment, the engaging mechanism further includes a second reset member, which tends to engage the engaging member with any of the plurality of gear positions.

[0044] In one embodiment, the bed frame further includes a release mechanism that drives the engaging member to disengage the engaging member from any of the plurality of positions.

[0045] In one embodiment, the release mechanism includes: a release operation member operably disposed on the first lever and having a release position and a locked position; and a transmission member connected to the release operation member and the engaging member respectively; when the release operation member is operated to switch from the locked position to the release position, the release operation member drives the engaging member to disengage from any of the plurality of gear positions via the transmission member.

[0046] In one embodiment, the engaging member has a pushing portion; the transmission member has an inclined surface; when the transmission member moves along a first direction, the inclined surface pushes against the pushing portion, so that the engaging member moves along a second direction to disengage from any of the plurality of gear positions, the first direction intersecting the second direction.

[0047] In one embodiment, the release mechanism further includes a third reset member that tends to hold the release actuation member in the locked position.

[0048] In one embodiment, the support mechanism includes two support rod assemblies, and the first gear position includes a first lowest gear position and a first highest gear position. When the first rod of one of the support rod assemblies is engaged with the first lowest gear position of the corresponding second rod, and the first rod of the other support rod assembly is engaged with the first highest gear position of the corresponding second rod, the tilt angle of the bed relative to the horizontal plane is less than or equal to a set angle.

[0049] In one embodiment, each of the support rod assemblies can be operated independently to independently adjust the length of each support rod assembly. Attached Figure Description

[0050] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0051] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the various components are shown as examples only and not necessarily to scale. In the accompanying drawings:

[0053] Figure 1 is a perspective view of a bed frame according to an embodiment of this application;

[0054] Figure 2 is a perspective view of the support mechanism in the bed frame shown in Figure 1;

[0055] Figure 3 is an enlarged view of the structure at circle A in Figure 2;

[0056] Figure 4 is an enlarged view of the structure at circle B in Figure 2;

[0057] Figure 5 shows a cross-sectional view along line U1-U1 in Figure 1;

[0058] Figure 6 is an enlarged view of the structure at circle C in Figure 5;

[0059] Figure 7 shows a cross-sectional view along line U2-U2 in Figure 1;

[0060] Figure 8 is a perspective view of the support mechanism in another embodiment of this application;

[0061] Figure 9 is an exploded view of the support mechanism shown in Figure 8;

[0062] Figure 10 is a schematic diagram of the second member in the support mechanism shown in Figure 9;

[0063] Figure 11 shows a cross-sectional view along line U3-U3 of Figure 8, with the limiting protrusion in the extended position;

[0064] Figure 12 shows a cross-sectional view of the support mechanism shown in Figure 8 when the limiting protrusion is in the retracted position;

[0065] Figure 13 shows a cross-sectional view of the support mechanism shown in Figure 8 when the limiting protrusion is in the retracted position and the first member has passed the limiting protrusion.

[0066] Explanation of reference numerals in the attached drawings: 10, Bed frame; 100, Bed body; 110, Bottom frame; 111, Side bottom rod; 111a, First side bottom rod; 111b, Second side bottom rod; 112, Transverse bottom rod; 112a, First transverse bottom rod; 112b, Second transverse bottom rod; 120, Top frame; 121, Side top rod; 121a, First side top rod; 121b, Second side top rod; 122, Transverse top rod; 122a, First transverse top rod; 122b, Second transverse top rod ; 130, Side rod assembly; 131, Side rod; 131a, First side rod; 131b, Second side rod; 131c, Third side rod; 131d, Fourth side rod; 140, Accommodation space; 151, Bottom corner piece; 152, Top corner piece; 200, Support mechanism; 210, Support rod assembly; 211, First rod; 2111, Locking hole; 212, Second rod; 213, Gear position; 213a, First gear position; 213a1, First lowest gear position Part; 213a2, First intermediate gear part; 213a3, First highest gear part; 213b, Second gear part; 214, Limiting hole; 220, Support foot; 230, Fixed base; 240, Moving wheel; 300, Limiting mechanism; 310, Limiting member; 311a, Elastic part; 312a, Limiting protrusion; 311b, Elastic part; 312b, Limiting protrusion; 313b, Blocking part; 320, Base; 321, Cavity; 322, Mounting hole; 323, ... 324. First opening; 330. Second opening; 331. Limiting pin; 332. Head; 333. Tail; 340. First reset component; 350. Stop; 400. Hanging rod; 500. Engaging mechanism; 510. Mounting base; 520. Engaging component; 521. Pushing part; 530. Second reset component; 600. Release mechanism; 610. Release operation component; 620. Transmission component; 621. Inclined surface; 630. Third reset component; F1. First direction; F2. Second direction. Detailed Implementation

[0067] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0068] A first aspect of this application provides a bed frame 10, as shown in FIG1. ​​The bed frame 10 may include, for example, a bed body 100, a support mechanism 200, and a limiting mechanism 300. The support mechanism 200 supports the bed body 100 and includes a support rod assembly 210, which includes a first rod 211 and a second rod 212. The support rod assembly 210 can be operated to allow relative movement between the first rod 211 and the second rod 212 to adjust the length of the corresponding support rod assembly 210. For example, the support mechanism 200 has one support rod assembly 210, which can be operated to adjust its length. Alternatively, the support mechanism 200 has multiple support rod assemblies 210, one of which can be operated to adjust its length; or two of the multiple support rod assemblies 210 can be operated to adjust their lengths.

[0069] As shown in Figures 2-3, the second lever 212 has multiple stop portions 213, and the first lever 211 is operably engaged with any one of the multiple stop portions 213 to maintain the support lever assembly 210 at a specific length. Specifically, the multiple stop portions 213 include multiple first stop portions 213a and at least one second stop portion 213b. A limiting mechanism 300 is provided on the support lever assembly 210 to prevent the first lever 211 from moving to engage with the second stop portion 213b. The limiting mechanism 300 can also be operated to allow the first lever 211 to move to engage with the second stop portion 213b. In other words, it can be understood that the first lever 211 cannot directly switch from being engaged with the first stop portion 213a to being engaged with the second stop portion 213b. Specifically, the first lever 211 can continuously switch between engaging with one of the multiple first stop sections 213a and engaging with another of the multiple first stop sections 213a; if multiple second stop sections 213b are provided, the first lever 211 can also continuously switch between engaging with one of the multiple second stop sections 213b and engaging with another of the multiple second stop sections 213b. However, the first lever 211 cannot directly switch from being engaged with one of the multiple first stop sections 213a to being engaged with one of the second stop sections 213b; this must be achieved by operating the limit mechanism 300. In this way, the bed frame 10 can be used stably in either the first or second use state, effectively preventing unintended switching of the bed frame 10 between different use states due to user error.

[0070] It should be noted that "multiple" as used in this article refers to a quantity of two or more. For example, two, three, or four, etc., without specific limitations.

[0071] Referring to Figure 1, in some embodiments, the bed frame 10 is illustrated, for example, as a crib. In one embodiment, the bed body 100 includes a bottom frame 110, a top frame 120, and a side rod assembly 130 connecting the bottom frame 110 and the top frame 120. A receiving space 140 is formed between the bottom frame 110, the side rod assembly 130, and the top frame 120, which can be used for infants to play or rest. Specifically, the top frame 120 and the bottom frame 110 can be, for example, rectangular or other shapes, without specific limitations.

[0072] Referring to Figure 1, in some embodiments, the bottom frame 110 may include, for example, side bottom bars 111 located on the left and right sides, and two transverse bottom bars 112 connected between the two side bottom bars 111. The side bottom bars 111 extend generally along the front-back direction of the bed frame 10, and the transverse bottom bars 112 extend generally along the left-right direction of the bed frame 10. Specifically, in this embodiment, the two transverse bottom bars 112 are respectively connected to the two ends of the side bottom bars 111. One of the transverse bottom bars 112 is called the first transverse bottom bar 112a, and the other transverse bottom bar 112 is called the second transverse bottom bar 112b; one of the side bottom bars 111 is called the first side bottom bar 111a, and the other side bottom bar 111 is called the second side bottom bar 111b. The first side bottom bar 111a, the first transverse bottom bar 112a, the second side bottom bar 111b, and the second transverse bottom bar 112b are connected end to end along the circumferential direction of the bottom frame 110.

[0073] It should be noted that, unless otherwise explicitly specified and limited, the directional terms such as "front," "rear," "left," and "right" related to the bed frame 10 in various embodiments of the present invention are based on the "front," "rear," "left," and "right" orientations of the bed frame 10 during normal use. Furthermore, arrows F and B are used to schematically indicate the "front" and "rear" directions in the figures, and arrows L and R are used to schematically indicate the "left" and "right" directions. These directional terms are only used to make the description of the embodiments of the present invention clearer and are not intended to unduly limit the scope of protection of the present invention.

[0074] Referring to Figure 1, in some embodiments, the top frame 120 may include, for example, side top rods 121 located on the left and right sides, and two transverse top rods 122 connected between the two side top rods 121. The side top rods 121 extend generally along the front-back direction of the bed frame 10, and the transverse top rods 122 extend generally along the left-right direction of the bed frame 10. Specifically, in this embodiment, the two transverse top rods 122 are respectively connected to the two ends of the side top rods 121. One of the transverse top rods 122 is called the first transverse top rod 122a, and the other transverse top rod 122 is called the second transverse top rod 122b; one of the side top rods 121 is called the first side top rod 121a, and the other side top rod 121 is called the second side top rod 121b. The first side top rod 121a, the first transverse top rod 122a, the second side top rod 121b, and the second transverse top rod 122b are connected end to end along the circumferential direction of the top frame 120.

[0075] Referring to Figure 1, in some embodiments, the side rod assembly 130 includes a plurality of side rods 131, which are spaced apart along the circumferential direction of the bed body 100. The first end of each side rod 131 is connected to the top frame 120, and the second end is connected to the bottom frame 110. In one embodiment, the side rod assembly 130 may include two side rods 131, wherein the first ends of the two side rods 131 are respectively connected to two side top rods 121, and the second ends of the two side rods 131 are respectively connected to two side bottom rods 111; or, the first ends of the two side rods 131 are respectively connected to two transverse top rods 122, and the second ends of the side rods 131 are respectively connected to two transverse bottom rods 112. Specifically, in this embodiment, the side rod assembly 130 includes four side rods 131 (referred to as first side rod 131a, second side rod 131b, third side rod 131c, and fourth side rod 131d, respectively). In this embodiment, four side rods 131 correspond to four top corner pieces 152 and four bottom corner pieces 151, respectively, with each side rod 131 connected between its corresponding top corner piece 152 and its corresponding bottom corner piece 151. It should be noted that in this embodiment, adjacent side top rods 121 and lateral top rods 122 are connected via top corner pieces 152. Adjacent side bottom rods 111 and lateral bottom rods 112 are connected via bottom corner pieces 151. Of course, in other embodiments, the first side rod 131a is connected between the first side top rod 121a and the first side bottom rod 111a, the second side rod 131b is connected between the first lateral top rod 122a and the first lateral bottom rod 112a, the third side rod 131c is connected between the second side top rod 121b and the second side bottom rod 111b, and the fourth side rod 131d is connected between the second lateral top rod 122b and the second lateral bottom rod 112b; specific limitations are not imposed here.

[0076] Referring to Figure 1, in some embodiments, the support mechanism 200 is connected to the bed frame 100 to support the bed frame 100, thereby raising the bed frame 100 to a certain height above the ground. The bed frame 100 can be fixedly connected to the support mechanism 200 by connectors (such as screws or bolts); alternatively, the bed frame 100 can be movably connected to the support mechanism 200 by other components, without specific limitations. In this embodiment, the bed frame 100 is movably connected to the support mechanism 200, for example, by a suspension rod 400. Specifically, the two ends of the suspension rod 400 are bent and extended in opposite directions to form an upper end and a lower end of the suspension rod 400. The upper end of the suspension rod 400 is pivotally connected to the support mechanism 200, and the lower end of the suspension rod 400 is pivotally connected to the bed frame 100. In this way, the bed frame 100 can rock relative to the support mechanism 200 by means of the suspension rod 400, which helps to lull infants to sleep.

[0077] Please refer to Figures 1 to 3. In this embodiment, the support mechanism 200 may further include support legs 220 and fixed seats 230, wherein each support rod assembly 210 has a fixed seat 230 and a support leg 220 connected to both ends. The support rod assembly 210 and the support leg 220 are connected approximately perpendicularly. The fixed seat 230 is connected to the bed frame 100 via a hanging rod 400. The support leg 220 is placed on the ground, and the support leg 220 may be equipped with casters 240, for example, to facilitate the user's movement of the bed frame 10. In one embodiment, as shown in Figure 1, there are two support rod assemblies 210, which are located on both sides of the bed frame 100. For example, the two support rod assemblies 210 may be located on the left and right sides of the bed frame 100, or they may be located on the front and rear sides of the bed frame 100.

[0078] In this embodiment, the first rod 211 is movable relative to the second rod 212, which makes the length of the support rod assembly 210 adjustable, and the support rod assembly 210 can be regarded as a telescopic structure. Specifically, as shown in the embodiments of Figures 1 and 2, the support rod assembly 210 includes a first rod 211 and a second rod 212 that are movable relative to each other. In this embodiment, the first rod 211 can be slidably sleeved with the second rod 212, specifically, the first rod 211 can be slidably sleeved outside the second rod 212, or the second rod 212 can be slidably sleeved outside the first rod 211. In this embodiment, the first rod 211 is slidably sleeved outside the second rod 212, the first rod 211 is connected to the fixed base 230, and the second rod 212 is connected to the support foot 220. By pulling or pushing the first rod 211, the relative position of the first rod 211 and the second rod 212 can be changed, thereby changing the length of the support rod assembly 210. In other embodiments not shown, the first rod 211 and the second rod 212 can move relative to each other in a non-sleeving manner. For example, the outer periphery of the first rod 211 is provided with a long groove along the length direction, and the outer periphery of the second rod 212 is provided with a rib. The first rod 211 can move relative to the second rod 212 by the cooperation of the rib and the long groove, so as to adjust the length of the support rod assembly 210.

[0079] Referring to Figures 2 and 4, in this embodiment, the second rod 212 has multiple stop portions 213, which are spaced apart along the length of the second rod 212. The first rod 211 can move relative to the second rod 212 among the various stop portions 213 and can selectively engage with one of the stop portions 213. When the first rod 211 engages with different stop portions 213, the effective length of the support rod assembly 210 is different. It should be noted that the "effective length of the support rod assembly 210" can be understood as the distance between the end of the first rod 211 connected to the fixing seat 230 and the end of the second rod 212 connected to the support foot 220.

[0080] In this embodiment, the aforementioned adjustment section 213 includes multiple first adjustment sections 213a and at least one second adjustment section 213b. The first adjustment sections 213a correspond to adjustment positions that the bed frame 10 can use during normal use, while the second adjustment sections 213b correspond to adjustment positions that the bed frame 10 can use during non-normal use, such as when the bed frame 10 needs to be folded down to a smaller size for easy carrying or transportation. Of course, the first adjustment sections 213a and 213b can correspond to other different usage scenarios. It should be noted that in this embodiment, the state of the bed frame 10 when the first rod 211 is engaged with the first adjustment section 213a is called the normal use state. The state of the bed frame 10 when the first rod 211 is engaged with the second adjustment section 213b is called the storage state (or non-normal use state). The second locking portion 213b is located below the first locking portion 213a along the length direction of the second rod 212. Therefore, when the first rod 211 engages with the second locking portion 213b, the effective length of the support rod assembly 210 is smaller, and this effective length is less than the effective length of the support rod assembly 210 when the first rod 211 engages with any one of the first locking portions 213a. Optionally, in other embodiments, when multiple second locking portions 213b are provided, the multiple second locking portions 213b are distributed at intervals along the length direction of the second rod 212. In this way, the support rod assembly 210 has multiple different folding locking positions. When the first rod 211 engages with different second locking portions 213b, the corresponding folded volume of the bed frame 10 is different.

[0081] Please refer to Figures 1 and 4. The bed frame 10 of this application also includes a limiting mechanism 300. The limiting mechanism 300 is disposed on the support rod assembly 210 to prevent the first rod 211 from moving from the position of the first stop 213a near the second stop 213b toward the second stop 213b. That is, the first rod 211 cannot be engaged with the second stop 213b suitable for carrying or transportation under normal use, so as to prevent the user from accidentally adjusting the length of the support rod assembly 210 to a length that is not suitable for daily use. Of course, when necessary, the limiting mechanism 300 can be operated to allow the first lever 211 to move from the position of the first stop 213a near the second stop 213b toward the second stop 213b, thereby engaging with the second stop 213b. That is, the first lever 211 can engage with the second stop 213b suitable for carrying or transport in special circumstances, so that the bed frame 10 is in a storage state or a non-daily use state, thereby reducing the volume of the bed frame 10 and making it convenient to carry or transport.

[0082] Referring to Figures 2 and 4, in some embodiments, the first lever 211 is movable relative to the second lever 212 between a first lowest gear 213a1, one of a plurality of first gear sections 213a, and a first highest gear 213a3, one of a plurality of first gear sections 213a. Specifically, among the plurality of first gear sections 213a, the first gear section 213a closest to the support foot 220 is referred to as the first lowest gear section 213a1, the first gear section 213a furthest from the support foot 220 is referred to as the first highest gear section 213a3, and the first gear section 213a between the first highest gear section 213a3 and the first lowest gear section 213a1 is referred to as the first intermediate gear section 213a2. It should be noted that there may be at least one first intermediate gear section 213a2 or it may be omitted. When the support rod assembly 210 is placed approximately vertically on the ground, the first highest position 213a3 is located above the first lowest position 213a1. When both first rods 211 on both sides are locked to the first highest position 213a3, the effective length of each support rod assembly 210 is at its longest, and the height of the bed frame 10 in the vertical direction is at its highest, at which point the bed frame 10 has its maximum usable height. When both first rods 211 on both sides are locked to the first lowest position 213a1, the effective length of each support rod assembly 210 is shorter than the effective length of each support rod assembly 210 when both first rods 211 on both sides are locked to the first highest position 213a3, and the height of the bed frame 10 in the vertical direction is lower than the height of the bed frame 10 in the vertical direction when the first rods 211 are locked to the first highest position 213a3, at which point the bed frame 10 has its minimum usable height. Thus, the user can adjust the locked position of the first rods 211 according to actual needs. In some embodiments, the length of the support rod assembly 210 on each side can be adjusted independently, that is, the relative movement of the first rod 211 and the second rod 212 of the support rod assembly 210 on each side can be adjusted independently. Therefore, when needed, the support rod assemblies 210 on both sides can be adjusted to have different lengths, at which point the bed frame 100 is in an inclined state. If the first rod 211 on one side is engaged in the first highest position 213a3, while the first rod 211 on the other side is engaged in the lowest second position 213b, the inclination angle of the bed frame 100 may be too large. The limiting mechanism 300 provided in this application can, on the one hand, prevent the bed frame 100 from tilting too much due to a large difference in height between the support rod assemblies 210 on both sides during daily use, and on the other hand, allow the first rod 211 to engage in the second position 213b when needed, so that the bed frame 10 can be folded into a smaller volume.

[0083] In some embodiments, the stop portion 213 is a through hole formed on the second rod 212; alternatively, the stop portion 213 may also be a groove formed on the second rod 212, without specific limitation. Specifically, in this embodiment, as shown in FIG4, the stop portion 213 is a through hole. The first rod 211 is provided with an engaging member 520 (described in detail below), such as an engaging pin, for engaging with any stop portion 213 to retain the first rod 211 in the stop portion 213.

[0084] In one embodiment, along the length of the support rod assembly 210, the direction from the first lowest gear portion 213a1 to the first highest gear portion 213a3 is called the positive direction, denoted as the Q1 direction, and the direction from the first highest gear portion 213a3 to the first lowest gear portion 213a1 is called the negative direction, denoted as the Q2 direction. The Q1 direction and the Q2 direction are parallel and opposite.

[0085] Referring to Figures 4 to 6, in some embodiments, the bed frame 10 may further include a locking mechanism 500. The locking mechanism 500 is disposed on the first rod 211 and adapted to engage with any of the plurality of stop portions 213 to define the relative position of the first rod 211 and the second rod 212, or in other words, to define the effective length of the support rod assembly 210. The locking mechanism 500 can engage with any of the first stop portions 213a to meet the daily use of the bed frame 10. Specifically, the locking mechanism 500 can engage with the first lowest stop portion 213a1, the first highest stop portion 213a3, or any of the plurality of first intermediate stop portions 213a2. Furthermore, the locking mechanism 500 can also engage with any of the plurality of second stop portions 213b to meet the storage requirements of the bed frame 10. Specifically, the engaging mechanism 500 may include a mounting base 510 and an engaging member 520. The mounting base 510 is mounted on the first lever 211, and the engaging member 520 is movably disposed on the mounting base 510 to engage or disengage with any of the multiple gear positions 213. Specifically, the first lever 211 has a locking hole 2111 through which the engaging member 520 passes. When the engaging member 520 passes through the locking hole 2111 and is inserted into any of the multiple gear positions 213, the relative positions of the first lever 211 and the second lever 212 are fixed. When the engaging member 520 disengages from any of the multiple gear positions 213, the relative positions of the first lever 211 and the second lever 212 are adjustable. It should be noted that the engaging member 520 can be slidably disposed on the mounting base 510, and can be inserted into or disengaged from the gear position 213 by means of movement. Alternatively, the engaging member 520 may be pivotally connected to the mounting base 510 and inserted into or retracted from the stop portion 213 by pivoting; no specific limitation is made here. In some embodiments, the engaging member 520 may be in the form of an engaging pin; in other embodiments, the engaging member 520 may also be in other forms such as a claw or a hook, and this application does not limit this.

[0086] Referring to Figure 6, in this embodiment, the engaging mechanism 500 may further include a second reset member 530, which may be, for example, an elastic structure such as a spring. Taking a spring as an example, the second reset member 530 abuts between the engaging member 520 and the mounting base 510 to provide elastic restoring force to the engaging member 520, so that the engaging member 520 can be constantly inserted into one of the plurality of positions 213, that is, the second reset member 530 tends to keep the engaging member 520 in one of the plurality of positions 213.

[0087] In some embodiments, when the locking mechanism 500 needs to be released, the user can directly operate the locking member 520 to disengage from the stop portion 213. Of course, in other embodiments, the locking member 520 can also be driven to disengage from the stop portion 213 by means of other mechanisms. Referring to Figures 3 and 6, in a preferred embodiment, the bed frame 10 further includes a locking mechanism 600, which drives the locking member 520 to disengage from any of the plurality of stop portions 213. Specifically, the locking mechanism 600 includes a locking operation member 610 and a transmission member 620. The locking operation member 610 is operably disposed on the first lever member 211 and has a locking position and a releasing position. The transmission member 620 connects the locking operation member 610 and the locking member 520. When the release operation member 610 is operated to switch from the locked position to the released position, the release operation member 610 drives the engaging member 520 to disengage from the gear position 213 via the transmission member 620.

[0088] Specifically, in some embodiments, as shown in Figures 3 and 6, the release operation member 610 is movably disposed on the first rod 211 and moves along the length direction of the first rod 211. Therefore, when the release operation member 610 moves from the locked position to the released position, it drives the transmission member 620 to move along the first direction F1 (i.e., the length direction of the first rod 211). In this embodiment, the engaging member 520 moves on the mounting base 510 along the second direction F2 to insert into or disengage from the stop portion 213, wherein the second direction F2 intersects the first direction F1. Specifically, the first direction F1 and the second direction F2 are perpendicular. In order to realize the conversion of the transmission member 620 from moving along the first direction F1 to driving the engaging member 520 to move along the second direction F2, in this embodiment, the engaging member 520 has a pushing portion 521, and the transmission member 620 has an inclined surface 621, with the pushing portion 521 contacting the inclined surface 621. When the transmission member 620 moves along the first direction F1, the inclined surface 621 pushes against the pushing part 521, causing the engaging member 520 to move along the second direction F2 to disengage from the gear position 213. In other embodiments, one of the engaging member 520 and the transmission member 620 may have a drive pin, and the other may have a drive groove. The drive pin is disposed in the drive groove. When the transmission member 620 moves along the first direction F1, the drive pin and the drive groove cooperate, which also allows the engaging member 520 to move along the second direction F2 to disengage from the gear position.

[0089] Please refer to Figures 3 and 6. In some embodiments, the release mechanism 600 may further include a third reset member 630, which may be, for example, an elastic structure such as a spring. Taking a spring as an example, the third reset member 630 abuts between the release operation member 610 and the first rod member 211 to provide elastic restoring force to the release operation member 610, so that the release operation member 610 is held in the locked position. That is, the third reset member 630 tends to hold the release operation member 610 in the locked position. Therefore, when the user needs to adjust the effective length of the support rod assembly 210, the user first operates (e.g., pulls or pushes) the release operation member 610 to move it to the release position. During this process, the engaging member 520 is driven to disengage from the corresponding inserted stop part 213 through the transmission action of the transmission member 620. After the length adjustment is completed, the release operation member 610 is released directly, and under the action of the third reset member 630, the release operation member 610 automatically resets to the locked position. Meanwhile, under the action of the second reset member 530, the engaging member 520 automatically inserts into the corresponding stop portion 213. Optionally, in other embodiments, the third reset member 630 may be omitted, and the release operation member 610 may be reset to the locked position by other means.

[0090] Typically, when adjusting the height of the bed frame 10, the height of each support mechanism 200 is adjusted one side at a time. During this process, if the heights of two support mechanisms 200 are inconsistent, the bed 100 will tilt relative to the ground or horizontal plane. If the tilt angle is too large, it can easily cause infants to roll over inside the bed 100 or slip off. To overcome this problem, in some embodiments, in the support rod assemblies 210 located on both sides, when the first rod 211 of one support rod assembly 210 is engaged with the first lowest position 213a1 of the corresponding second rod 212, and the first rod 211 of the other support rod assembly 210 is engaged with the first highest position 213a3 of the corresponding second rod 212, the tilt angle of the bed 100 relative to the horizontal plane is less than or equal to a specific angle. Thus, even in the extreme case where the effective length of the support rod assembly 210 on one side is at its maximum value, while the effective length of the support mechanism 200 on the other side is adjusted to its minimum value, the tilt angle of the bed frame 100 relative to the ground or horizontal plane will not exceed a specific angle, which helps to improve the safety of using the bed frame 10. In this embodiment, the specific angle can be 7°. Of course, in other embodiments, the specific angle can be other specified values, such as 5°, 6°, 8°, or 9°, etc., and no specific limitation is made here.

[0091] Referring to Figures 1-2 and 7-9, in some embodiments, when the first lever 211 is released at the first lowest position 213a1, the limiting mechanism 300 located on the second lever 212 can selectively restrict the movement of the first lever 211 relative to the second lever 212 in a direction away from the first highest position 213a3, that is, in the Q2 direction. In other words, the limiting mechanism 300 can selectively prevent the first lever 211 from moving to engage with the second position 213b.

[0092] Please refer to Figures 1-2 and 7-9. In some embodiments, the limiting mechanism 300 may include a limiting member 310 movably disposed on one of the first rod 211 and the second rod 212, and a stop portion 350 disposed on the other of the first rod 211 and the second rod 212. The limiting member 310 and the stop portion 350 stop and cooperate to prevent the first rod 211 from moving to engage with the second stop portion 213b.

[0093] In some embodiments, at least a portion of the limiting member 310 is operably switchable between an extended position and a retracted position. When the at least portion of the limiting member 310 is in the extended position (see FIG. 7 or FIG. 11), the limiting member 310 cooperates with the stop portion 350 to prevent the first lever 211 from moving to engage with the second stop portion 213b. When the at least portion of the limiting member 310 is in the retracted position (see FIG. 12 and FIG. 13), the first lever 211 can move along the Q2 direction to pass over the at least portion, thereby moving to engage with the second stop portion 213b.

[0094] Referring to Figures 7 and 11, in some embodiments, the limiting member 310 can be movably disposed on the second rod 212, while the stop portion 350 is disposed on the first rod 211. Specifically, the stop portion 350 can be regarded as the lower end of the first rod 211, and at least a portion of the limiting member 310 selectively passes through the second rod 212 and protrudes from the outer wall of the second rod 212 to prevent the first rod 211 from moving to engage with the second gear portion 213b. Specifically, in this embodiment, when the first rod 211 is in the first lowest gear portion 213a1, at least a portion of the limiting member 310 passes through the second rod 212 and abuts or is adjacent to the end of the first rod 211 away from the fixing seat 230, thereby restricting the first rod 211 from continuing to move in the Q2 direction at the first lowest gear portion 213a1 to engage with the second gear portion 213b. Specifically, in some embodiments, when the engaging member 520 of the first lever 211 engages with the first lowest gear portion 213a1, and then the release operation member 610 is operated to disengage the engaging member 520 from the first lowest gear portion 213a1, if a force is applied to the first lever 211 to move it along the Q2 direction, at least the portion of the limiting member 310 protruding from the second lever 212 can abut against the stop portion 350 to prevent the first lever 211 from continuing to move along the Q2 direction to engage with the second gear portion 213b.

[0095] Referring to Figure 7, in some embodiments, the limiting member 310 includes a limiting protrusion 312a that protrudes from the outer wall of the second rod 212 through the limiting hole 214 of the second rod 212 to engage with the stop portion 350 of the first rod 211, thereby preventing the first rod 211 from moving past the limiting member 310 relative to the second rod 212 in the Q2 direction. Of course, the limiting protrusion 312a can be operated to retract from the limiting hole 214, thereby allowing the first rod 211 to move past the limiting member 310 and engage with the second stop portion 213b.

[0096] Referring to Figure 7, in some embodiments, the limiting member 310 may further include an elastic portion 311a, to which a limiting protrusion 312a is connected. Specifically, the elastic portion 311a is connected to the second rod 212, and the elastic portion 311a tends to cause the limiting protrusion 312a to pass through the limiting hole 214 of the second rod 212 and protrude from the outer wall of the second rod 212 to engage with the stop portion 350 of the first rod 211. The limiting member 310 can also be operated to retract the limiting protrusion 312a from the limiting hole 214. More specifically, the elastic portion 311a has a natural state and a deformed state. When the elastic portion 311a is in its natural state, the limiting protrusion 312a passes through the limiting hole 214 to extend out of the second rod 212. Alternatively, it can be understood that when the limiting protrusion 312a passes through the limiting hole 214 to extend out of the second rod 212, the elastic portion 311a is in its natural state. When the user applies force to disengage the limiting protrusion 312a from the limiting hole 214, the elastic part 311a can be considered to be in a deformed state, exerting an elastic force on the limiting protrusion 312a through the limiting hole 214. If the user then removes the applied force, the elastic part 311a automatically resets, causing the limiting protrusion 312a to re-pass through the limiting hole 214 and protrude from the surface of the second rod 212. Alternatively, it can be understood that when no force is applied to the limiting member 310, the elastic part 311a will remain in its natural state, and the limiting protrusion 312a will remain in the state of passing through the limiting hole 214. This structural design prevents the first rod 211 from moving relative to the second rod 212 along the Q2 direction and engaging with the second stop part 213b, thus preventing the bed 100 from tilting at an excessive angle.

[0097] It should be noted that in this embodiment, when the user needs to retract the limiting protrusion 312a from the limiting hole 214, the user can directly push the limiting protrusion 312a against the outside of the second rod 212. Of course, in other embodiments, other methods can also be used to drive the limiting protrusion 312a out of the limiting hole 214, and no specific restrictions are made here.

[0098] In some embodiments, as shown in FIG7, the limiting protrusion 312a may be integrally formed with the elastic portion 311a. Optionally, the limiting protrusion 312a may also be connected to the elastic portion 311a, which is not specifically limited here.

[0099] In some embodiments, as shown in FIG7, the elastic portion 311a may, for example, be V-shaped and engaged within the second rod 212 to prevent the elastic portion 311a from detaching from the second rod 212. Optionally, the elastic portion 311a may also have other structures, such as a shape adapted to the inner wall of the second rod 212, which may be directly fixedly connected to the side wall of the second rod 212, without specific limitations.

[0100] In one embodiment, the limiting member 310 may be provided with multiple limiting protrusions 312a. When the elastic part 311a is installed in the second rod 212, the multiple limiting protrusions 312a are located at the same height along the length direction of the support rod assembly 210. Correspondingly, the side wall of the second rod 212 is provided with multiple limiting holes 214 (see Figure 2), and the multiple limiting holes 214 correspond one-to-one with the multiple limiting protrusions 312a. Optionally, in other embodiments, the elastic part 311a may be provided with multiple, and each elastic part 311a is connected to a corresponding limiting protrusion 312a. When the multiple elastic parts 311a are installed in the second rod 212, the multiple limiting protrusions 312a are located at the same height along the length direction of the support rod assembly 210. Correspondingly, the side wall of the second rod 212 is provided with multiple limiting holes 214, and the multiple limiting holes 214 correspond one-to-one with the multiple limiting protrusions 312a.

[0101] Alternatively, in another embodiment, the limiting member 310 may have other structures. Referring to FIG9, similarly, the limiting member 310 includes a limiting protrusion 312b, which protrudes from the outer wall of the second rod 212 through the limiting hole 214 of the second rod 212 to engage with the stop portion 350 of the first rod 211, thereby restricting the first rod 211 from moving relative to the second rod 212 in the Q2 direction to engage with the second stop portion 213b. Of course, the limiting protrusion 312b can be operated to retract from the limiting hole 214, thereby allowing the first rod 211 to move to engage with the second stop portion 213b.

[0102] Referring to Figure 9, in one embodiment, the limiting member 310 further includes an elastic portion 311b, and a limiting protrusion 312b is connected to and protrudes from the elastic portion 311b. The limiting mechanism 300 also includes a base 320, which is connected to the second rod 212. Specifically, the base 320 is disposed within the second rod 212. The elastic portion 311b and the limiting protrusion 312b are movably connected to the base 320. Specifically, the elastic portion 311b is connected to the base 320 and has a natural state and a deformed state. When the elastic portion 311b is in the natural state, the limiting protrusion 312b passes through the limiting hole 214 to extend out of the second rod 212. Alternatively, it can be understood that when the limiting protrusion 312b passes through the limiting hole 214 to extend out of the second rod 212, the elastic portion 311b is in the natural state. Similarly, when the user applies a force to the limiting member 310 to cause the limiting protrusion 312b to retract from the limiting hole 214, the elastic part 311b deflects and stores elastic potential energy, and the elastic part 311b is in a deformed state. When the user removes the force applied to the elastic part 311b, the elastic part 311b releases the elastic potential energy to automatically reset, thereby driving the limiting protrusion 312b through the limiting hole 214 to protrude from the surface of the second rod 212. In this embodiment, the elastic part 311b and the limiting protrusion 312b are integrally formed with the base 320, which can be understood as the elastic part 311b and the limiting protrusion 312b together forming part of the sidewall of the base 320. In other embodiments, the elastic part 311b and the limiting protrusion 312b may be components independent of the base 320 but connected to the base 320.

[0103] Referring to Figures 9 and 11-13, in one embodiment, the limiting mechanism 300 may further include a limiting pin 330, which is movably disposed on the second rod 212 and has a first position and a second position. As shown in Figure 11, when the limiting pin 330 is in the first position, it is located along the movement path of the elastic part 311b, thus restricting the movement of the elastic part 311b and consequently restricting the retraction of the limiting protrusion 312b from the limiting hole 214. This further improves the reliability of the limiting mechanism 300 and better ensures the safety of the bed frame 10. As shown in Figure 12, when the limiting pin 330 is in the second position, it deviates from the movement path of the elastic part 311b, allowing the elastic part 311b to move and thus allowing the limiting protrusion 312b to retract from the limiting hole 214. It should be noted that in this embodiment, the first position is located above the second position. Of course, in other embodiments, the second position may also be located above the first position, and no specific limitation is made here.

[0104] In the embodiment shown in FIG9, the limiting pin 330 can be movably disposed within the base 320. However, in other embodiments without a base 320 (such as the embodiment shown in FIG7), the limiting pin 330 can be directly movably disposed within the second rod 212, and the limiting pin 330 restricts the movement of the elastic part 311a, thereby restricting the limiting protrusion 312a from retracting from the limiting hole 214.

[0105] Please refer to Figures 9 and 11. In this embodiment, the base 320 can be a cylindrical structure with an internal cavity 321. The side of the base 320 has a mounting hole 322 communicating with the cavity 321. The elastic part 311b is connected to or integrally formed on the side wall of the mounting hole 322. When no external force is applied to the elastic part 311b, it is flush with the outer peripheral wall of the base 320, and the limiting protrusion 312b is opposite to and passes through the limiting hole 214. Specifically, the limiting pin 330 includes a connected head 331 and a tail 332, which cooperate to form a "T"-shaped structure. The bottom of the base 320 has a second opening 324 communicating with the cavity 321. The limiting pin 330 is movably disposed within the cavity, and its tail 332 can be inserted into the second opening 324. When the limiting pin 330 is in the first position, its head 331 is located on the path of the elastic part 311b moving into the cavity 321, thus restricting the rotation of the elastic part 311b, and the limiting protrusion 312b remains passing through the limiting hole 214. When the limiting pin 330 is in the second position, its head 331 deviates from or retracts from the path of the elastic part 311b moving into the cavity 321, thus allowing the elastic part 311b to rotate, and the limiting protrusion 312b can retract from the limiting hole 214.

[0106] It should be noted that in this embodiment, when the user needs to retract the limiting protrusion 312b from the limiting hole 214 into the second rod 212, the limiting pin 330 is first operated to move the limiting pin 330 to the second position; then, the limiting protrusion 312b can be directly pushed against the outside of the second rod 212 to make the limiting protrusion 312b retract from the limiting hole 214. Of course, in other embodiments, other methods can also be used to drive the limiting protrusion 312b away from the limiting hole 214, and no specific restrictions are made here.

[0107] Optionally, in other embodiments, the aforementioned limiting pin 330 may be omitted. When the user needs to retract the limiting protrusion 312b from the limiting hole 214, the limiting protrusion 312b may be pushed against the outside of the second rod 212 or driven to retract from the limiting hole 214 by other means. No specific restrictions are imposed here.

[0108] Referring to Figures 9 and 11, in one embodiment, the limiting mechanism 300 may further include a first reset member 340, which is, for example, an elastic structure such as a spring. Taking a spring as an example, the first reset member 340 abuts between the edge of the second opening 324 and the head 331 of the limiting pin 330 to provide an elastic restoring force to the limiting pin 330, so that the limiting pin 330 is held in the first position, that is, the first reset member 340 tends to hold the limiting pin 330 in the first position. Therefore, the limiting pin 330 can be moved from the first position to the second position by pushing the head 331 of the limiting pin 330 downward or pulling the tail 332 of the limiting pin 330 downward.

[0109] Referring to Figures 9 and 11, in this embodiment, the top of the base 320 may have a first opening 323, which communicates with the cavity 321. In one embodiment, the elastic portion 311b may also have a blocking portion 313b, which protrudes from the elastic portion 311b into the cavity 321. In other words, the protrusion direction of the blocking portion 313b is opposite to the protrusion direction of the limiting protrusion 312b. The blocking portion 313b is located on the side of the limiting pin 330 near the first opening 323 and is located on the movement path of the limiting pin 330. In other words, the blocking portion 313b is located above the limiting pin 330 to prevent the limiting pin 330 from disengaging from the cavity 321 through the first opening 323. Similarly, in other embodiments, similar blocking portions may be provided. For example, in the embodiment shown in FIG7, when a limit pin 330 is provided, a blocking portion may also be provided on the elastic portion 311a. The protrusion direction of the blocking portion is opposite to the protrusion direction of the limit protrusion 312a, so as to restrict the movement of the limit pin 330.

[0110] The following diagrams will briefly explain the process and principle of length adjustment of the support mechanism 200.

[0111] When the engaging member 520 is engaged with any of the multiple first gear positions 213a, the bed frame 10 is considered to be in its normal use state. In this case, at least a portion of the limiting member 310 (such as the limiting protrusion 312a or the limiting protrusion 312b) will pass through the limiting hole 214 and protrude from the surface of the second rod 212 (see Figure 7 or Figure 11). When it is necessary to adjust the height of the support mechanism 200, that is, when it is necessary to adjust the effective length of the support rod assembly 210, taking the process of the engaging member 520 needing to switch from the first highest gear position 213a3 to other first gear positions 213a as an example. As shown in Figure 6, the user first operates the release operation member 610, and through the transmission action of the transmission member 620, the engaging member 520 is disengaged from the first highest gear position 213a3, and the first rod 211 can then move along the Q2 direction. During this process, because the limiting protrusion 312a (see Figure 7) or the limiting protrusion 312b (see Figure 11) protrudes from the surface of the second rod 212, when the first rod 211 disengages from the first lowest position portion 213a1 and continues to move towards engaging with the second position portion 213b, the limiting protrusion 312a or the limiting protrusion 312b will abut against the stop portion 350 of the first rod 211 (see Figure 7 or Figure 11), thereby limiting the range of movement of the first rod 211 relative to the second rod 212. This ensures that the engaging mechanism 500 can only engage with any one of the first position portions 213a, but not with the second position portion 213b. In other words, by the limiting protrusion 312a or the limiting protrusion 312b protruding from the surface of the second rod 212, the engaging mechanism 500 can lock any one of the first position portions 213a. After the length adjustment is completed, the user releases the release mechanism 610, which will automatically reset to the locked position. At the same time, the second reset mechanism 530 drives the locking mechanism 520 to re-insert into one of the first gear positions 213a.

[0112] When the user needs to switch the bed frame 10 to the folded-out state, the user first operates the release mechanism 610 to disengage the engaging member 520 from the first position portion 213a. Then, the user operates the limiting mechanism 310 (e.g., manually pressing the limiting protrusion 312a or 312b) to retract the limiting protrusion 312a or 312b from the limiting hole 214 (switching from Figure 11 to Figure 12). In this way, the limiting protrusion 312a or 312b no longer obstructs the first rod 211, and the end of the first rod 211 (stop portion 350) can pass over the limiting protrusion 312a or 312b (switching from Figure 11 to Figures 12 and 13 sequentially) until the engaging member 520 aligns with one of the second position portions 213b. Finally, the user releases the release mechanism 610, causing the engaging member 520 to engage with one of the second position portions 213b.

[0113] It should be noted that during the switching process of the bed frame 10, when the limiting protrusion 312a and the elastic part 311a are involved, the embodiment corresponding to FIG7 can be referred to. When the elastic part 311b and the limiting protrusion 312b are involved, the embodiments corresponding to FIG8 to FIG13 can be referred to.

[0114] Furthermore, it should be noted that when the stop portion 350 passes the limiting protrusion 312a or the limiting protrusion 312b, the limiting protrusion 312a or the limiting protrusion 312b will abut against the inner wall of the first rod 211. This keeps the corresponding elastic portion 311a or the elastic portion 311b in a deformed state and stores elastic potential energy. Therefore, when the user needs to switch the bed frame 10 from the storage state to the daily use state, they only need to operate the release operation member 610 to disengage the locking member 520 from the second stop portion 213b, and then directly pull or push the first rod 211 in the positive direction (i.e., the Q1 direction). When the stop portion 350 passes the limiting protrusion 312a or the limiting protrusion 312b, the elastic portion 311a resets and causes the limiting protrusion 312a to pass through the limiting hole 214 again and protrude from the surface of the second rod 212, or the elastic portion 311b resets and causes 312b to pass through the limiting hole 214 again and protrude from the surface of the second rod 212 (switching from Figure 13 to Figure 12 and Figure 11 in sequence) to maintain the extended position.

[0115] The bed frame 10 described in the first aspect of this application has the following technical effects:

[0116] The support rod assembly 210 includes a first rod 211 and a second rod 212 that are movable relative to each other. The second rod 212 has multiple stops 213. The first rod 211 can move relative to the second rod 212 between the multiple stops 213. This gives the bed frame 10 a height-adjustable function, allowing users to flexibly adjust the height of the bed frame 10 according to their own needs to meet different usage scenarios. For example, the height of the bed frame 10 can be adjusted according to the user's different height or usage habits, or different usage environments (such as matching furniture of different heights), providing convenience for users. Furthermore, this application divides the multiple gear sections 213 into a first gear section 213a corresponding to the daily use state and a second gear section 213b corresponding to the storage state, and provides a limiting mechanism 300 to selectively prevent the first rod 211 from sliding to engage with the second gear section 213b. This avoids the user accidentally moving the first rod 211 to the position where it engages with the second gear section 213b during daily use, thereby preventing the bed frame 10 from being accidentally switched from the daily use state to the storage state. Specifically, when multiple support rod assemblies 210 are included, and each support rod assembly 210 can be operated individually to adjust the relative movement of the corresponding first rod 211 and second rod 212, different support rod assemblies 210 may be adjusted to have different lengths, thereby creating a tilt angle between different sides of the bed frame 100. The solution of this application also effectively avoids the problem of excessive tilt angle between different sides of the bed frame 100, thereby preventing potential safety hazards, such as preventing items from slipping or infants from falling due to excessive tilt angle of the bed frame 100, and improving the reliability and safety of the bed frame 10.

[0117] A second aspect of this application provides a bed frame 10, as shown in FIG. 1. The bed frame 10 may include, for example, a bed body 100 and a support mechanism 200. The support mechanism 200 supports the bed body 100 and includes a support rod assembly 210, which includes a first rod 211 and a second rod 212. The support rod assembly 210 can be operated to allow relative movement between the first rod 211 and the second rod 212 to adjust the length of the corresponding support rod assembly 210. For example, the support mechanism 200 has one support rod assembly 210, which can be operated to adjust its length. Alternatively, the support mechanism 200 has multiple support rod assemblies 210, one of which can be operated to adjust its length; or two of the multiple support rod assemblies 210 can be operated to adjust their lengths.

[0118] As shown in Figures 2 and 3, the support rod assembly 210 can be provided with multiple stop sections 213. The first rod 211 can be operably engaged with any one of the multiple stop sections 213 to maintain a specific length of the support rod assembly 210. Specifically, the multiple stop sections 213 include multiple first stop sections 213a and multiple second stop sections 213b. When the first rod 211 is engaged with the first stop section 213a, the bed frame 10 is in a first usage state; when the first rod 211 is engaged with the second stop section 213b, the bed frame 10 is in a second usage state. By setting different stop sections for different usage states, the bed frame 10 has multiple usage states to meet the needs of various usage scenarios. Preferably, multiple usage state indicators can also be provided on the bed frame 10 to make it easier for users to adjust the bed frame 10 to the desired usage state.

[0119] In some embodiments, the first lever 211 cannot continuously switch from a state engaged with one of the first stop portions 213a to a state engaged with one of the second stop portions 213b. That is, the first stop portion 213a is specifically used for a first usage state, while the second stop portion 213b is specifically used for a second usage state; the first lever 211 can be continuously adjusted between any two of the plurality of first stop portions 213a, and the first lever 211 can also be continuously adjusted between any two of the plurality of second stop portions 213b, but the first lever 211 cannot be continuously adjusted between any one of the plurality of first stop portions 213a and any one of the plurality of second stop portions 213b. In this way, the bed frame 10 can be used stably in either the first or second usage state, effectively preventing unintended switching of the bed frame 10 between different usage states due to user error.

[0120] In some embodiments not shown, for example, the first stop portion 213a and the second stop portion 213b may be located on another component of the support rod assembly 210. For example, the first stop portion 213a may be located on the second rod 212, while the second stop portion 213b may be located on other components of the support rod assembly 210. In this way, the first rod 211 can be continuously adjusted on either the first stop portion 213a or the second stop portion 213b, but cannot be continuously adjusted from a state engaged with one of the first stop portions 213a to a state engaged with one of the second stop portions 213b. When it is necessary to switch the bed frame 10 from a first use state to a second use state, it is necessary to operate the support rod assembly 210 so that the first rod 211 and the other component can move relative to each other in the height direction.

[0121] In some embodiments not shown, for example, both the first stop portion 213a and the second stop portion 213b are located on the second rod 212, and the first stop portion 213a and the second stop portion 213b are not collinear. For example, the first stop portion 213a is arranged along a first straight line on the second rod 212, while the second stop portion 213b is arranged along a second straight line on the second rod 212, and the first and second straight lines are not collinear. Similarly, the first rod 211 can be continuously adjusted on either the first stop portion 213a or the second stop portion 213b, but cannot be continuously adjusted from a state engaged with one of the first stop portions 213a to a state engaged with one of the second stop portions 213b. When it is necessary to switch the bed frame 10 from a first use state to a second use state, it is necessary to operate the support rod assembly 210 to make the second straight line parallel to the height direction.

[0122] For example, the first straight line can be parallel to the second straight line, and the first rod 211 and the second rod 212 can rotate relative to each other. When it is necessary to switch the bed frame 10 from the first use state to the second use state, the support rod assembly 210 is operated to make the first rod 211 and the second rod 212 rotate relative to each other, so that the first rod 211 can be engaged with the second stop part 213b.

[0123] In some embodiments, as shown in Figures 2-3, both the first gear position 213a and the second gear position 213b are located on the second rod 212, and are arranged collinearly. That is, the first gear position 213a and the second gear position 213b are arranged collinearly in the height direction, or in other words, are arranged continuously in a straight line along the height direction on the second rod 212. The first gear position 213a and the second gear position 213b are the same as those in the first aspect of this application, and will not be described again here.

[0124] In some embodiments, the bed frame 10 also has a limiting mechanism 300 disposed on the support rod assembly 210, which is the same as the limiting mechanism 300 of the first aspect of this application, and will not be described again here.

[0125] The locking mechanism 500, the unlocking mechanism 600, and other structures of the bed frame 10 in the second aspect of this application are the same as those described above in conjunction with the first aspect, and will not be repeated here.

[0126] The bed frame 10 described in the second aspect of this application has the following technical effects:

[0127] The bed frame 10 has a first use state and a second use state, and the first rod 211 is engaged with either the first stop part 213a or the second stop part 213b. By setting different stop parts for different use states, the bed frame 10 has multiple use states to meet the needs of multiple use scenarios.

[0128] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0129] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A bed frame, characterized in that, include: Bed frame; A support mechanism for supporting the bed frame, the support mechanism including a support rod assembly, the support rod assembly including a first rod and a second rod, the support rod assembly being operable to allow relative movement between corresponding first rods and second rods to adjust the length of the corresponding support rod assembly, the second rod having multiple stop portions, the first rod being operably engaged with one of the stop portions, the multiple stop portions including multiple first stop portions and at least one second stop portion; and A limiting mechanism is provided on the support rod assembly to prevent the first rod from moving to engage with the second gear position, and the limiting mechanism can be operated to allow the first rod to move to engage with the second gear position.

2. The bed frame according to claim 1, characterized in that, The limiting mechanism includes a limiting member movably disposed on one of the first rod and the second rod, and a stop portion disposed on the other of the first rod and the second rod. The limiting member cooperates with the stop portion to prevent the first rod from moving to engage with the second stop portion.

3. The bed frame according to claim 2, characterized in that, At least a portion of the limiting member is operably switchable between an extended position and a retracted position. When in the extended position, the limiting member cooperates with the stop portion to prevent the first rod from moving to engage with the second stop portion. When in the retracted position, the first rod can move to engage with the second stop portion.

4. The bed frame according to claim 3, characterized in that, The limiting member is movably disposed on the second rod, and the stop portion is disposed on the first rod. When in the extended position, at least a portion of the limiting member protrudes from the outer wall of the second rod.

5. The bed frame according to claim 4, characterized in that, The limiting member includes an elastic portion and a limiting protrusion connected to the elastic portion. The elastic portion is connected to the second rod, and the second rod is provided with a limiting hole. The elastic portion tends to cause the limiting protrusion to protrude from the limiting hole from the outer wall of the second rod. The limiting member can be operated to retract the limiting protrusion from the limiting hole.

6. The bed frame according to claim 5, characterized in that, The end of the elastic part away from the limiting protrusion is formed into a V-shaped structure and is engaged with the second rod; Alternatively, the elastic part may be fixed to the second rod.

7. The bed frame according to claim 5, characterized in that, The limiting mechanism further includes a base, which is connected to the second rod, and the elastic part and the limiting protrusion are movably connected to the base.

8. The bed frame according to claim 5, characterized in that, The limiting mechanism further includes a limiting pin, which is movably disposed on the second rod and has a first position and a second position; When the limiting pin is in the first position, the limiting pin is located on the movement path of the elastic part to restrict the limiting protrusion from retracting from the limiting hole; when the limiting pin is in the second position, the limiting pin deviates from the movement path of the elastic part to allow the limiting protrusion to retract from the limiting hole.

9. The bed frame according to claim 8, characterized in that, The limiting mechanism further includes a base connected to the second rod. A portion of the wall of the base forms the elastic portion and the limiting protrusion. The base has a cavity, and the limiting pin is movably disposed within the cavity.

10. The bed frame according to claim 9, characterized in that, The elastic part is further provided with a blocking part, which protrudes into the cavity and is located in the movement path of the limiting pin to restrict the limiting pin from dislodging from the cavity.

11. The bed frame according to claim 8, characterized in that, The limiting mechanism further includes a first reset member, which tends to keep the limiting pin in the first position.

12. The bed frame according to claim 1, characterized in that, The first rod is provided with a locking mechanism, which is adapted to engage with any of the plurality of gear positions to limit the relative positions of the first rod and the second rod.

13. The bed frame according to claim 12, characterized in that, The engaging mechanism includes: a mounting base mounted on the first rod; and an engaging member movably disposed on the mounting base and capable of engaging and disengaging with any of the plurality of gear positions.

14. The bed frame according to claim 13, characterized in that, The engaging mechanism further includes a second reset member, which tends to engage the engaging member with any of the plurality of gear positions.

15. The bed frame according to claim 13, characterized in that, The bed frame also includes a release mechanism, which drives the engagement member to disengage the engagement member from any of the plurality of positions.

16. The bed frame according to claim 15, characterized in that, The unlocking mechanism includes: an unlocking operating member operably disposed on the first lever and having an unlocking position and a locking position; and a transmission member connected to the unlocking operating member and the engaging member respectively. When the unlocking operating member is operated to switch from the locking position to the unlocking position, the unlocking operating member drives the engaging member to disengage from any of the plurality of gear positions via the transmission member.

17. The bed frame according to claim 16, characterized in that, The engaging member has a pushing portion; the transmission member has an inclined surface; when the transmission member moves along a first direction, the inclined surface pushes against the pushing portion, so that the engaging member moves along a second direction to disengage from any of the plurality of gear positions, the first direction intersecting the second direction.

18. The bed frame according to claim 16, characterized in that, The release mechanism further includes a third reset member, which tends to hold the release actuation member in the locked position.

19. The bed frame according to claim 1, characterized in that, The support mechanism includes two support rod assemblies. The first gear position includes a first lowest gear position and a first highest gear position. When the first rod of one of the support rod assemblies is engaged with the first lowest gear position of the corresponding second rod, and the first rod of the other support rod assembly is engaged with the first highest gear position of the corresponding second rod, the tilt angle of the bed relative to the horizontal plane is less than or equal to a set angle.

20. The bed frame according to claim 1, characterized in that, Each of the support rod assemblies can be operated independently to adjust the length of each support rod assembly independently.

Images