WO2023103177A1

WO2023103177A1 - Bunk bed having retractable ladder

Info

Publication number: WO2023103177A1
Application number: PCT/CN2022/076402
Authority: WO
Inventors: 谢杰夫
Original assignee: 谢杰夫
Priority date: 2021-12-10
Filing date: 2022-02-16
Publication date: 2023-06-15
Also published as: CN114568869A

Abstract

A bunk bed having a retractable ladder, which aims to solve the problem of a climbing risk for young children caused by the fact that ladders of existing bunk beds cannot be retracted. The bunk bed comprises an upper bed frame (1), a connecting assembly (2), which is connected to the upper bed frame (1), and a ladder (3), one end of which is connected to the connecting assembly (2). The connecting assembly (2) is configured in such a way that the ladder (3) can be fixed below the upper bed frame (1) when the connecting assembly (2) is in a retracted state, and, when the connecting assembly (2) is in an extended state, the ladder (3) can extend out from below the upper bed frame (1) and is obliquely arranged downwards in the direction from one end of the ladder (3) to the other end thereof. By means of such arrangements, when the ladder (3) is not in use, the ladder (3) can be retracted below the upper bed frame (1), so that a climbing risk for young children is avoided; and when there is a need to get in and out bed, it is only necessary to pull out the ladder (3) from below the upper bed frame (1). The ladder (3) can be in an oblique state, and, compared with a vertical ladder, makes getting in and out bed more convenient, and the risk of falling off the ladder (3) is small.

Description

ladder retractable bunk bed

technical field

The invention belongs to the technical field of furniture and specifically provides a bunk bed with a retractable ladder.

Background technique

As the country's fertility rate has accelerated, policies to encourage births have begun. Accompanied by the increase in two-child families, most families cannot satisfy one child in one room, and when the child is young, sleeping alone in one room also feels lonely. Therefore, many families will choose to buy double-layer children's beds.

Existing double-layer children's beds include an upper bed frame and a lower bed frame, and a ladder is arranged outside the bed body. The top of the ladder is fixed to the upper bed frame, and the bottom of the ladder is supported on the ground so that children can climb to the upper bed. However, the existing ladders are all fixedly connected to the bed body and cannot be put away. If a child climbs onto the ladder alone, there is a risk of falling from the ladder.

Therefore, a new technical solution is needed in the art to solve the above problems.

Contents of the invention

In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem that the climbing ladders of the existing bunk beds cannot be stowed, so that there is a risk of young children climbing, the present invention provides a bunk bed with stowable ladders, including The upper bed frame, the bunk bed also includes: a connection assembly, which is connected to the upper bed frame; and a ladder, one end of which is connected to the connection assembly; wherein, the connection assembly is set to In the contracted state, the ladder can be fixed under the upper bed frame, and when the connecting assembly is in an extended state, the ladder can be stretched out from the bottom of the upper bed frame and the ladder can One end of the ladder is inclined downward toward the other end.

In the preferred technical solution of the above-mentioned bunk bed, the connecting assembly includes: a fixed member, which is connected with the upper bed frame; and a movable member, which is movably connected with the fixed member, and one end of the ladder is connected with the The first end of the movable member is connected; wherein the movable member can move relative to the fixed member along the length direction of the movable member, so that the connecting assembly can be switched between a contracted state and an extended state, and the The movable member can rotate relative to the fixed member along the circumferential direction of the movable member so that the ladder can rotate downward with the end of the ladder connected to the movable member as an axis in the extended state, thereby The ladder is arranged obliquely downward along the direction from one end of the ladder to the other end.

In the preferred technical solution of the bunk bed above, the fixed member is provided with a first position-limiting structure, and the movable member is provided with a second position-limiting structure, and in the contracted state, the first position-limiting structure and The second limiting structure cooperates to prevent the movable member from rotating relative to the fixed member.

In the preferred technical solution of the bunk bed above, the fixed member is a cylindrical structure, the movable member is a shaft-shaped structure, and the first position-limiting structure is formed on the inner wall of the cylindrical structure along the A limit chute extending in the length direction of the cylindrical structure, the second limit structure is a limit protrusion formed on the outer surface of the shaft structure, and in the contracted state, the limit protrusion is located in the limiting chute so as to prevent the shaft-shaped structure from rotating relative to the cylindrical structure, and the limiting chute allows the limiting protrusion to move along the length direction of the limiting chute Free sliding in the limit chute.

In the preferred technical solution of the bunk bed above, the connection assembly further includes: a torsion spring, which is arranged on the fixed member; and a buffer limit member, which is arranged on the movable member; wherein, the torsion The spring cooperates with the buffer limit member to prevent the movable member from detaching from the fixed member, and in the extended state, the free end of the torsion spring is connected with the buffer limit member to Buffer when the ladder turns downwards.

In the preferred technical solution of the bunk bed above, the fixed member is a cylindrical structure, the movable member is a shaft-shaped structure, the torsion spring is located in the cylindrical structure, and the buffering and limiting member is an annular structure, the ring structure is sleeved on the shaft structure, and the outer diameter of the ring structure is adapted to the inner diameter of the cylindrical structure.

In the preferred technical solution of the above-mentioned bunk bed, the connection assembly further includes an elastic limit pin, the elastic limit pin is arranged on the movable member, and a limit hole is arranged on the fixed member. , the elastic limit pin is located in the limit hole so as to prevent the movable member from moving relative to the fixed member.

In the preferred technical solution of the bunk bed above, the movable member forms an accommodating space near its first end, the elastic limit pin is located in the accommodating space, and the connecting assembly further includes a pushing member , one end of the pushing member is close to the first end of the movable member, and the other end of the pushing member abuts against the elastic limit pin, so that the elastic limit pin can move from the limit hole Inner prolapse.

In the preferred technical solution of the bunk bed above, the bunk bed further includes a handrail, the handrail is connected with the ladder, and in the contracted state, the handrail is located on one side of the upper bed frame.

In the preferred technical solution of the above bunk bed, the connection assembly further includes a clamp and a back-shaped steel, the clamp and the back-shaped steel are fixedly connected by fasteners, and the said back-shaped steel is sleeved on the For the rectangular beam of the upper bed frame, the fixing member is fastened to the rectangular beam through the clip and the back-shaped steel.

Those skilled in the art can understand that, in the preferred technical solution of the present invention, the ladder is connected to the upper bed frame through the connecting assembly, and the connecting assembly has an extended state and a contracted state. When the connecting assembly is in the contracted state, it can The ladder is fixed below the upper bed frame, and when the connecting assembly is in an elongated state, the ladder can be stretched out from the bottom of the upper bed frame, and the ladder can be tilted downward along the direction from one end of the ladder to the other end. Through such a setting, when the ladder is not in use, the ladder can be stored under the upper bed frame to avoid the risk of young children climbing. It is in an inclined state. Compared with the vertical ladder, it is more convenient to get on and off the bed through the inclined ladder, and the risk of falling from the ladder is small.

Further, the connection assembly includes: a fixed component and a movable component, the movable component is movably connected to the fixed component, and one end of the ladder is connected to the first end of the movable component; the movable component can move relative to the fixed component along the length direction of the movable component, so as to facilitate The connecting assembly can be switched between the retracted state and the extended state; and, in the extended state, the movable member can rotate relative to the fixed member along the circumferential direction of the movable member, so that the ladder can be adjusted to an inclined state, and the structure is simple and easy to operate .

Furthermore, by setting the first limiting structure and the second limiting structure on the fixed component and the movable component of the connection assembly respectively, in the contracted state, the first limiting structure cooperates with the second limiting structure, which can The movable member is prevented from rotating relative to the fixed member. With such an arrangement, there is no need to separately arrange a fixing device to fix the other end of the ladder, thereby reducing costs.

Furthermore, the connection assembly also includes: a torsion spring and a buffer limit member, wherein the torsion spring cooperates with the buffer limit member to prevent the movable member from detaching from the fixed member, thereby preventing the ladder from being separated from the upper bed frame, thereby improving safety. and in the extended state, the free end of the torsion spring is connected to the buffer limit member to buffer when the ladder turns downwards. Through this setting, the impact force of the ladder on the ground can be reduced, thereby avoiding the impact of the ladder on the ground. and ground damage, but also to reduce noise.

Still further, the fixed member is arranged as a cylindrical structure, the movable member is arranged as a shaft-shaped structure, the torsion spring is located in the cylindrical structure, the buffer and limit member is a ring-shaped structure, and the ring-shaped structure is sleeved on the shaft-shaped structure, and the ring The outer diameter of the cylindrical structure matches the inner diameter of the cylindrical structure. Such an arrangement facilitates the movement and rotation of the movable member relative to the fixed member, making it easy for customers to operate.

Still further, the movable member forms an accommodation space near its first end, the elastic limit pin is located in the accommodation space, and the connection assembly further includes a pushing member, one end of the pushing member is close to the first end of the moving member, and the pushing member The other end leans against the elastic limit pin, so that the elastic limit pin can escape from the limit hole. With such an arrangement, it is easier to control the state of elongation or shortening of the connected components, thereby improving customer satisfaction.

Still further, the connection assembly also includes a clamp and a back-shaped steel, the clamp and the back-shaped steel are fixedly connected by fasteners, the back-shaped steel is sleeved on the rectangular beam of the upper bed frame, and the fixing member passes through the clamp and the back-shaped steel Fastened to a rectangular beam. Through such an arrangement, the stability of the connection assembly fixed on the upper bed frame can be effectively improved.

Description of drawings

Describe preferred embodiment of the present invention below with reference to accompanying drawing, in the accompanying drawing:

Fig. 1 is the structural representation of bunk bed when connecting assembly of the present invention is contracted state;

Fig. 2 is a schematic structural view of the bunk bed when the connecting assembly of the present invention is in an extended state;

Fig. 3 is the structural representation of ladder of the present invention;

Figure 4 is a side view of the fixing member of the present invention;

Fig. 5 is the sectional view of A-A direction in Fig. 4;

Fig. 6 is the front view of movable member of the present invention;

Fig. 7 is a side view of the movable member of the present invention;

Fig. 8 is a schematic structural view of the cushioning and limiting member of the present invention;

Fig. 9 is a structural representation of the torsion spring of the present invention;

Fig. 10 is a schematic structural view of the elastic limit pin of the present invention;

Fig. 11 is the schematic diagram of the combined state of clamp, back-shaped steel, fixed member and rectangular beam of the present invention;

List of reference signs:

1. Upper bed frame; 11. Rectangular beam; 2. Connecting components; 21. Cylindrical structure; 21A, flat tube section; 21B, cylindrical section; 211, chamfering structure; 212, limit hole; Limiting structure; 214, clamping slot; 22, shaft structure; 221, second limiting structure; 222, blocking member; 223, accommodation space; 23, buffering and limiting member; 231, hole structure; 24, Elastic limit pin; 241, elastic plate; 242, bayonet pin; 25, pushing member; 251, connecting shaft; 252, first disc; 253, second disc; 26, torsion spring; 261, fixed end; 262 , free end; 3, climbing ladder; 31, the first fixed rod; 32, the second fixed rod; 321, the main part; 322, the clamping part; 3221, the slot; Fixing hole; 5, back-shaped steel; 51, threaded hole; 6, handrail.

Detailed ways

First of all, those skilled in the art should understand that the embodiments described below are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention. For example, although the embodiments described below are described in conjunction with bunk beds (comprising upper and lower bed frames), the technical solutions of the present invention can also be applied to other types of beds, for example, beds that only include the upper bed frame (Desk etc. are set under the upper bed frame) or comprise the bed of multilayer bed frame, etc.

It should be noted that, in the description of the present invention, the terms "upper", "lower", "left", "inner", "outer" and other terms indicating direction or positional relationship are based on the direction or position shown in the drawings This relationship is for convenience of description only, and does not indicate or imply that the device must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the present invention. In addition, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In addition, it should be noted that, in the description of the present invention, unless otherwise clearly stipulated and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a It is a detachable connection, or an integral connection. Those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

Referring to Fig. 1 and Fig. 2 at first, wherein, Fig. 1 is the structural representation of the bunk bed when the connecting assembly of the present invention is in the contracted state; Fig. 2 is the structural representation of the bunk bed when the connecting assembly of the present invention is in the elongated state.

As shown in Fig. 1 and Fig. 2, the bunk bed that the climbing ladder can be folded of the present invention comprises an upper bed frame 1, a connecting assembly 2 and a climbing ladder 3, the connecting assembly 2 is connected with the upper layer bed frame 1, and one end of the climbing ladder 3 is connected with the connecting assembly 2 connections, wherein, the connection assembly 2 has two states, contracted state and extended state, when the connection assembly 2 is in the contracted state, as shown in Figure 1, the ladder 3 can be fixed below the upper bed frame 1, when the connection assembly 2. When in the extended state, as shown in FIG. 2, the ladder 3 can be stretched out from the bottom of the upper bed frame 1, and the ladder 3 can be inclined downward along the direction from one end of the ladder 3 to the other end.

The ladder 3 is connected to the upper bed frame 1 by setting the connection component 2. Generally, the connection component 2 is in a contracted state, and the ladder 3 is located below the upper bed frame 1. When it is necessary to get on and off the bed, the connection component 2 is switched from the contracted state To the elongated state, the ladder 3 is about to be pulled out from the bottom of the upper bed frame 1, and the ladder 3 can be in an inclined state after being pulled out. Compared with the existing vertical ladder, it is more convenient to get on and off the bed through the inclined ladder 3, And the risk of falling from the ladder 3 is very small. After getting on or off the bed, switch the connecting assembly 2 from the extended state to the contracted state, so as to fix the ladder 3 to the bottom of the upper bed frame 1 and prevent young children from climbing risk, and can also reduce the footprint.

Continue to refer to Fig. 2, and then refer to Fig. 4 to Fig. 7, wherein, Fig. 4 is the side view of fixed member of the present invention; Fig. 5 is the sectional view of A-A direction in Fig. 4; Fig. 6 is the front view of movable member of the present invention ; Figure 7 is a side view of the movable member of the present invention.

As shown in Figures 4 to 7, the connection assembly 2 of the present invention includes a fixed component and a movable component connected, the fixed component is fixedly connected with the upper bed frame 1 or is arranged as one, and one end of the ladder 3 is connected to the first end of the movable component ( Viewed from Figure 6 as the left end of the movable member) connection; wherein the movable member can move relative to the fixed member along the length direction of the movable member, so that the connection assembly 2 can switch between the contracted state and the elongated state, and the movable member can be Rotate relative to the fixed member along the circumferential direction of the movable member, so that the ladder 3 can rotate downward with the end of the ladder 3 connected to the movable member as the axis in the extended state, so that the ladder 3 moves along one end of the ladder 3 towards the other end The direction of the slope is set downwards.

Wherein, the fixed component can be set as a cylindrical structure 21, and the movable component can be set as a shaft-shaped structure 22, the shaft-shaped structure 22 can be inserted in the cylindrical structure 21, and the shaft-shaped structure 22 can be opposite to the cylindrical structure along its axial direction. 21 moves left and right, and can rotate relative to the cylindrical structure 21 along its circumferential direction, or, a circular sliding groove can also be formed in the fixed member, and the part connecting the movable member and the fixed member is set as a circular sliding groove. The column, the sliding column is inserted into the chute, and can freely rotate and slide left and right relative to the chute, etc., the adjustment and change of the specific structural forms of the fixed member and the movable member do not deviate from the principle and scope of the present invention. All should be limited within the protection scope of the present invention.

Of course, it is preferable to set the fixed component as a cylindrical structure 21 and the movable component as a shaft-shaped structure 22, which has a simple and beautiful structure. Taking the cylindrical structure 21 as the fixed component and the shaft-shaped structure 22 as the movable component as an example, continue to introduce the technical solution of the present invention.

Exemplarily, as shown in Figures 1 and 2, the upper bed frame 1 is a rectangular bed frame, and the cylindrical structure 21 is fixed at one end of the length direction of the upper bed frame 1, and extends along the width direction of the upper bed frame 1, in the shape of a shaft. The first end of the structure 22 (the left end of the shaft-shaped structure seen from FIG. 6 ) is connected to the ladder 3, and the second end of the shaft-shaped structure 22 (the right end of the shaft-shaped structure seen from FIG. 6 ) is inserted into the cylindrical structure 21 Inside, in the contracted state, as shown in Figure 1, most of the shaft-shaped structure 22 is inserted into the cylindrical structure 21, and only the part close to the first end of the shaft-shaped structure 22 leaks out of the cylindrical structure 21, the shaft-shaped The structure 22 can slide relative to the cylindrical structure 21 along the width direction of the upper bed frame 1, so that the ladder 3 can be pulled out from the bottom of the upper bed frame 1 or pushed back to the bottom of the upper bed frame 1, and, After the ladder 3 is pulled out, as shown in FIG. 2 , the ladder 3 can be in an inclined state.

Continuing to refer to FIG. 4 to FIG. 7 , the cylindrical structure 21 is provided with a first limiting structure 213 , and the shaft structure 22 is provided with a second limiting structure 221 . In the contracted state, the first limiting structure 213 and the second Cooperating with the limit structure 221, the shaft-shaped structure 22 can be prevented from rotating relative to the cylindrical structure 21, so that the ladder 3 can be arranged horizontally.

It should be noted that, in the contracted state, in order to reduce the occupation of the activity space below the upper bed frame 1, as shown in FIG. Two limit structures 221 are used to prevent the shaft structure 22 from rotating relative to the cylindrical structure 21, so that the ladder 3 can be horizontally arranged, and in the extended state, the shaft structure 22 is pulled out from the cylindrical structure 21, The first limiting structure 213 is separated from the second limiting structure 221 to release the restriction on the shaft structure 22, and the shaft structure 22 can rotate relative to the cylindrical structure 21 to make the ladder 3 rotate from a horizontal state to an inclined state.

That is to say, the first limiting structure 213 and the second limiting structure 221 can only limit the rotation of the shaft-shaped structure 22 relative to the cylindrical structure 21 when in the contracted state, but do not restrict the rotation of the shaft-shaped structure 22 when in the extended state. The cylindrical structure 22 rotates relative to the cylindrical structure 21.

Wherein, the first limiting structure 213 can be set as a groove formed on the inner wall of the cylindrical structure 21, and correspondingly, the second limiting structure 221 can be set as a protrusion formed on the outer surface of the shaft structure 22. , in the contracted state, the protrusion can just be located in the groove to prevent the shaft-like structure 22 from rotating relative to the cylindrical structure 21, and in the extended state, the protrusion is separated from the groove, or the first limiting The positioning structure 213 is set as a square bayonet and is set close to the first end of the cylindrical structure 21. Correspondingly, the second limiting structure 221 is set as a square block and is set close to the first end of the shaft structure 22. In the contracted state , the square clamping block can just be clamped in the square bayonet socket to prevent the shaft-shaped structure 22 from rotating relative to the cylindrical structure 21. In the extended state, the square bayonet socket is separated from the square clamping block, and so on. The adjustment and change of the specific structural forms of the first limiting structure 213 and the second limiting structure 221 do not deviate from the principle and scope of the present invention, and should be limited within the protection scope of the present invention.

It should be noted that, in practical applications, the setting of the first limiting structure 213 and the second limiting structure 221 can also be cancelled. The opposite end of the ladder 3 is provided with a clamping member, and the other end of the ladder 3 is clamped to the upper bed frame 1 through the clamping member. Of course, preferably by setting the first limiting structure 213 and the second limiting structure 221, Make climbing ladder 3 be horizontal setting under contracted state.

Continuing to refer to FIG. 4 to FIG. 7, the first limiting structure 213 is a limiting chute formed on the inner wall of the cylindrical structure 21 and extends along the length direction of the cylindrical structure 21, and the second limiting structure 221 is formed on the shaft The limit protrusion on the outer surface of the cylindrical structure 22, in the contracted state, the limit protrusion is located in the limit chute, thereby preventing the shaft-like structure 22 from rotating relative to the cylindrical structure 21, and the limit chute allows The limiting protrusion slides freely in the limiting chute along the length direction of the limiting chute.

In the retracted state, the limiting protrusion is located in the limiting chute, which can prevent the shaft structure 22 from rotating relative to the cylindrical structure 21, so that the ladder 3 is horizontally arranged. When it is necessary to get on and off the bed, the ladder 3 is pulled outwards, The limit protrusion can slide along the limit chute, that is, the limit protrusion and the limit chute will not restrict the axial structure 22 from moving relative to the cylindrical structure 21 along its axial direction. Move, the limit protrusion is separated from the limit chute. In the extended state, the ladder 3 rotates from the horizontal state to the inclined state. When the ladder 3 needs to be put away, first rotate the ladder 3 to the horizontal state, and then push it inward For the ladder 3, as the shaft-like structure 22 moves inward, the limit projection slides into the limit chute again, and in the contracted state, the shaft-like structure 22 is restricted from rotating relative to the cylindrical structure 21, so that the ladder 3 is horizontally arranged .

Preferably, there are multiple limiting slide grooves distributed along the circumferential direction of the cylindrical structure 21, and the number of limiting protrusions is also multiple and distributed along the circumferential direction of the shaft-shaped structure 22. In the contracted state , the limit protrusion is located in the corresponding limit chute.

Exemplarily, the number of the limit chute and the limit protrusion are four, and they are respectively evenly distributed on the inner wall of the cylindrical structure 21 and the outer surface of the shaft structure 22, that is to say, the cylindrical structure 21 is similar to As for the spline sleeve, the shaft structure 22 is similar to a spline shaft.

It should be noted that the number of the limiting chute and the limiting protrusion is not limited to the above four, for example, it can be set as two, three or five, and so on. The adjustment and change of the specific quantity of the limiting chute and the limiting protrusion do not deviate from the principle and scope of the present invention, and should be limited within the protection scope of the present invention.

Next, refer to FIG. 8 and FIG. 9 , wherein FIG. 8 is a front view of the cushioning and limiting member of the present invention; FIG. 9 is a schematic structural view of the torsion spring of the present invention.

As shown in Figures 5, 6, 8, and 9, the connection assembly 2 of the present invention also includes a torsion spring 26 and a buffer limit member 23, the torsion spring 26 is arranged in the cylindrical structure 21, and the buffer limit member 23 is arranged structure 22; wherein, the torsion spring 26 cooperates with the buffer limit member 23 to prevent the axial structure 22 from coming out of the cylindrical structure 21, and, in the extended state, the free end 262 of the torsion spring 26 and the buffer limit The member 23 is connected to cushion when the ladder 3 turns downward.

Exemplarily, the torsion spring 26 includes a fixed end 261 and a free end 262. Both the fixed end 261 and the free end 262 are protruding columnar structures, and an engaging groove 214 is provided on the inner wall of the cylindrical structure 21. The fixed end of the torsion spring 26 261 is clamped in the engaging groove 214, and the buffer limiting member 23 is arranged close to the second end of the shaft-shaped structure 22. The buffer limiting member 23 is formed with a hole-like structure 231. When it is in an extended state, the torsion spring 26 The fixed end 261 is just plugged into the hole-shaped structure 231 formed on the buffer-limiting member 23. Under the blocking of the torsion spring 26, the shaft-shaped structure 22 can be restricted from continuing to slide outwards, preventing the shaft-shaped structure 22 from sliding from the cylindrical structure. 21, in addition, when the shaft-like structure 22 rotates, the free end 262 of the torsion spring 26 will rotate together with the buffer limit member 23, and the torsion spring 26 will provide a force to limit the rotation of the shaft-like structure 22 to lower the shaft. Therefore, the downward rotation speed of the ladder 3 is effectively reduced, thereby buffering the rotation of the ladder 3 .

It should be noted that the free end 262 of the torsion spring 26 can also be set as a bayonet-shaped structure. Correspondingly, a protruding structure is provided on the buffer limit member 23. The mouth-shaped structure is used to connect the torsion spring 26 with the buffer limit member 23. This flexible adjustment and change does not deviate from the principle and scope of the present invention, and should be limited within the protection scope of the present invention.

In addition, it should also be noted that the buffer limit member 23 can be set as a limit block or a limit ring, etc., and this adjustment and change to the specific structural form of the buffer limit member 23 does not deviate from the principles and principles of the present invention. scope, should be limited within the protection scope of the present invention.

Preferably, as shown in FIGS. 6 and 8 , the buffering and limiting member 23 is an annular structure, sheathed on the shaft-shaped structure 22 , and the outer diameter of the annular structure matches the inner diameter of the cylindrical structure 21 . Exemplarily, the buffering and limiting member 23 is a ring nut, an internal thread is formed on the inner ring wall of the ring nut, an external thread is formed on the outer surface of the shaft-shaped structure 22, the internal thread is compatible with the external thread, and the ring nut is compatible with the external thread. The shaft-shaped structure 22 is threaded, or the ring nut and the shaft-shaped structure 22 can also be fixedly connected by pins.

Continue to refer to FIG. 6 and FIG. 7 , and then refer to FIG. 10 , wherein FIG. 10 is a schematic structural diagram of the elastic limit pin of the present invention.

As shown in Figures 6, 7, and 10, the connection assembly 2 of the present invention also includes an elastic limit pin 24, which is arranged on the shaft-shaped structure 22, and a limit hole 212 is arranged on the cylindrical structure 21. In the state, the elastic limit pin 24 is located in the limit hole 212 , thereby preventing the shaft-shaped structure 22 from moving relative to the cylindrical structure 21 .

Exemplarily, the shaft-shaped structure 22 is formed with an accommodation space 223 near its first end, and the elastic limit pin 24 is located in the accommodation space 223. The elastic limit pin 24 includes an approximately U-shaped elastic plate 241 and is arranged on The locking pin 242 at one end of the elastic plate 241 is fixed in the accommodation space 223 at the other end of the elastic plate 241 , and the shaft structure 22 is formed with a through hole at a position corresponding to the locking pin 242 so that one end of the locking pin 242 can protrude.

When in the retracted state, the locking pin 242 is located in the limit hole 212 formed in the cylindrical structure 21, which can prevent the shaft-shaped structure 22 from moving relative to the cylindrical structure 21, thereby preventing the automatic movement of the ladder 3 and improving safety. When it is necessary to get on and off the bed, the elastic plate 241 can be deformed so that the bayonet pin 242 can escape from the limiting hole 212 .

Preferably, as shown in FIG. 6 , the connection assembly 2 of the present invention further includes a push member 25, one end of the push member 25 is close to the first end of the shaft-shaped structure 22, and the other end of the push member 25 is against the elastic limit pin 24 on the elastic plate 241 of the elastic limit pin 24 so as to disengage from the limit hole 212.

When it is necessary to get on and off the bed, it is only necessary to push the pushing member 25 inwards to move, so that the pushing member 25 applies pressure to the elastic plate 241, so that the elastic plate 241 of the elastic limit pin 24 is deformed, so that the elastic limit pin 24 is locked. The pin 242 escapes from the limiting hole 212 .

Wherein, the pushing member 25 can be set as a push rod, and one end of the push rod directly abuts against the elastic limit pin 24; or, the pushing member 25 can also be set as a combined structure of a push rod and a stopper.

Preferably, as shown in FIG. 6, the pushing member 25 includes a first disc 252, a second disc 253 and a connecting shaft 251, and the two ends of the connecting shaft 251 are respectively connected to the first disc 252 and the second disc 253, The first disc 252 is close to the first end of the shaft-shaped structure 22 , the bottom surface of the second disc 253 is close to the elastic plate 241 of the elastic limit pin 24 , and the top surface of the second disc 253 is in close contact with the inner wall of the accommodation space 223 . When it is necessary to get on and off the bed, push the first disc 252 inwards to drive the second disc 253 to move inwards, and as the second discs 253 move inwards, the elastic plate 241 is deformed downwards, so that the latch 242 escapes from the limiting hole 212.

Preferably, as shown in FIG. 4 and FIG. 5 , a chamfer structure 211 is provided at the entrance of the cylindrical structure 21 , so that the elastic limit pin 24 can slide into the cylindrical structure 21 smoothly. When packing up the ladder 3, when the elastic limit pin 24 moved to the entrance of the cylindrical structure 21 along with the shaft-like structure 22, the elastic limit pin 24 abutted against the inclined surface of the chamfered structure 211, on the inclined surface Under the action of extrusion, the elastic limit pin 24 expands and contracts, thereby smoothly sliding into the cylindrical structure 21. When sliding to the position of the limit hole 212, the elastic limit pin 24 automatically springs into the limit hole 212 .

Preferably, as shown in FIG. 6 , a blocking member 222 is further provided on the shaft-shaped structure 22 , and the blocking member 222 can block the opening end of the accommodating space 223 . The blocking member 222 is preferably made of elastic rubber material, so as to push the pushing member 25 to move.

Continue to refer to Figures 1 and 2, and then refer to Figure 3, wherein Figure 3 is a structural schematic diagram of the climbing ladder of the present invention.

As shown in FIGS. 1 to 3 , the bunk bed of the present invention also includes a handrail 6 connected to the ladder 3 , and the handrail 6 is located on one side of the upper bed frame 1 in a contracted state.

Exemplarily, the ladder 3 includes a first fixed rod 31, a second fixed rod 32 and a connecting plate 33, the first fixed rod 31 and the second fixed rod 32 are arranged opposite to each other left and right, the number of connecting plates 33 is multiple, and multiple connecting plates 33 Plate 33 is installed between the first fixed rod 31 and the second fixed rod 32 to form a structure for getting on and off the bed. To improve safety, in the retracted state, as shown in Figure 1, the handrail 6 is located on one side of the upper bed frame 1 to form a guardrail structure, and the first fixed rod 31, the second fixed rod 32 and the connecting plate 33 are all located on the upper bed frame 1 below.

Wherein, one end of the first fixed rod 31 is fixedly connected to the shaft-shaped structure 22, for example, can be fixed by a connecting pin, and one end of the second fixed rod 32 is engaged with the shaft-shaped structure 22, for example, the second fixed rod 32 includes a main body 321 and the clamping part 322, one end of the clamping part 322 is rotatably connected with the main body part 321, and the other end of the clamping part 322 is formed with a clamping groove 3221, and in the extended state, the clamping groove 3221 of the clamping part 322 is clamped On the shaft structure 22 , when the ladder 3 is retracted, the engaging part 322 is rotated to separate the engaging part 322 from the shaft structure 22 , so that the shaft structure 22 can be smoothly inserted into the cylindrical structure 21 .

It should be noted that, in the extended state, the second fixed rod 32 may not be engaged with the shaft-shaped structure 22, for example, a support member may be provided on the column of the bed, and the second fixed rod 32 may be fixed in the extended state. One end of the rod 32 is overlapped with the supporting member, or a snap ring is provided at one end of the second fixed rod 32 so that the snap ring is sleeved on the cylindrical structure 21 and can slide along the length direction of the cylindrical structure 21, etc. , such flexible adjustments and changes do not depart from the principle and scope of the present invention, and should be limited within the protection scope of the present invention.

Next, refer to FIG. 11 , wherein, FIG. 11 is a schematic diagram of the combined state of the clip, the back-shaped steel, the fixing assembly and the rectangular beam of the present invention.

As shown in Figure 11, the connection assembly 2 of the present invention also includes a clamp 4 and a back-shaped steel 5, a groove is formed in the middle of the clamp 4, the shape of the groove is adapted to the cylindrical structure 21, and the two sides of the clamp 4 The ends are respectively fixed with the bottom surface of the back-shaped steel 5. Exemplarily, fixing holes 41 are respectively provided at the two ends of the clip 4, and threaded holes 51 are provided at the corresponding positions of the back-shaped steel 5 at the same time. The clip 4 and the back-shaped steel The steel 5 is fixedly connected by fasteners such as screws, the upper bed frame 1 has a rectangular beam 11, the back-shaped steel 5 is sleeved on the rectangular beam 11, and the fixing member is fixed on the rectangular beam 11 through the clamp 4 and the back-shaped steel 5. Wherein, the number of back-shaped steel 5 is two, which are respectively connected with the two ends of the clamp 4 . Of course, the back-shaped steel 5 can be arranged as a full-length structure.

Preferably, as shown in FIG. 4 , FIG. 5 and FIG. 11 , the cylindrical structure 21 includes a flat tube section 21A and a cylindrical section 21B, and the flat tube section 21A is fastened to the rectangular beam 11 through the clamp 4 and the back-shaped steel 5 .

So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings, but those skilled in the art will easily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims

A bunk bed with foldable ladders, comprising an upper bed frame, characterized in that the bunk bed also includes:

a connection assembly connected to the upper bed frame; and

a ladder, one end of which is connected to the connection assembly;

Wherein, the connection assembly is configured to be able to fix the ladder below the upper bed frame when the connection assembly is in a contracted state, and to enable the ladder to move from the upper bed frame when the connection assembly is in an extended state. The bottom of the upper bed frame protrudes and the ladder is arranged obliquely downward along the direction from one end of the ladder to the other end.
The bunk bed according to claim 1, wherein the connection assembly comprises:

a fixing member connected to the upper bed frame; and

a movable member, which is connected to the fixed member, and one end of the ladder is connected to the first end of the movable member;

wherein the movable member is movable relative to the fixed member along the length of the movable member, so that the connection assembly can be switched between a contracted state and an extended state, and

The movable member can rotate relative to the fixed member along the circumferential direction of the movable member so that the ladder can rotate downward with the end of the ladder connected to the movable member as an axis in the extended state, Therefore, the ladder is arranged obliquely downward along the direction from one end of the ladder to the other end.
The bunk bed according to claim 2, characterized in that, the fixed member is provided with a first position-limiting structure, and the movable member is provided with a second position-limiting structure. The limiting structure cooperates with the second limiting structure to prevent the movable member from rotating relative to the fixed member, so that the ladder is arranged horizontally.
The bunk bed according to claim 3, wherein the fixed member is a cylindrical structure, the movable member is a shaft-shaped structure, and the first limiting structure is formed on the inner wall of the cylindrical structure The limit chute extending along the length direction of the cylindrical structure on the top, the second limit structure is a limit protrusion formed on the outer surface of the shaft structure, in the contracted state, the The limiting protrusion is located in the limiting chute so as to prevent the shaft structure from rotating relative to the cylindrical structure, and the limiting chute allows the limiting protrusion to move along the limiting chute The length direction is free to slide in the limit chute.
The bunk bed according to claim 2, wherein the connection assembly further comprises:

a torsion spring disposed on the fixed member; and

a buffer limit member, which is arranged on the movable member;

Wherein, the torsion spring cooperates with the buffer limit member to prevent the movable member from detaching from the fixed member, and

In the extended state, the free end of the torsion spring is connected with the buffer limit member for buffering when the ladder rotates downward.
The bunk bed according to claim 5, wherein the fixed member is a cylindrical structure, the movable member is a shaft-shaped structure, the torsion spring is located in the cylindrical structure, and the buffer limit The component is a ring structure, the ring structure is sheathed on the shaft structure, and the outer diameter of the ring structure is adapted to the inner diameter of the cylindrical structure.
The bunk bed according to claim 2, characterized in that, the connecting assembly further comprises an elastic limit pin, the elastic limit pin is arranged on the movable member, and a limit hole is arranged on the fixed member, In the retracted state, the elastic limit pin is located in the limit hole so as to prevent the movable member from moving relative to the fixed member.
The bunk bed according to claim 7, characterized in that, the movable member forms an accommodating space near its first end, the elastic limit pin is located in the accommodating space, and the connecting assembly It also includes a pushing member, one end of the pushing member is close to the first end of the movable member, and the other end of the pushing member abuts against the elastic limit pin, so that the elastic limit pin can move from the out of the limiting hole.
The bunk bed according to claim 1, characterized in that, the bunk bed further comprises a handrail, the handrail is connected with the ladder, and in the contracted state, the handrail is located on one side of the upper bed frame .
The bunk bed according to any one of claims 2 to 9, characterized in that, the connection assembly further includes a hoop and a back-shaped steel, and the hoop and the back-shaped steel are fixedly connected by fasteners , the back-shaped steel is sleeved on the rectangular beam of the upper bed frame, and the fixing member is fastened to the rectangular beam through the clamp and the back-shaped steel.