A kind of pull-out bed and installation and use method

By using the matching design of rollers and guide rails in the bed design, the pull-pull movement of the bed support is solved, and the difficulty of cleaning and laying bed sheets in the gaps in the existing bed design is solved, making the operation more convenient.

CN119732568APending Publication Date: 2025-04-01SLEEMON HEALTHY SLEEP TECHNOLOGY CO LTD +1
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Patent Information

Application Number
CN202411983941.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-31
Publication Date
2025-04-01

AI Technical Summary

Technical Problem

In the existing bed design, it is difficult to clean and lay the sheets in the gap between the mattress and the bed frame, resulting in inconvenient operation.

Method used

With the matching design of rollers and guide rails, the bed support can be pulled and moved in a pull-out manner. Through the structure of guide grooves and rollers, the bed support can be pulled and reset, making it easier to clean and lay the bed sheets.

Benefits of technology

It realizes convenient extraction and reset of the bed support, solves the problems of cleaning the gaps and laying the bed sheets, making it more convenient to operate.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention discloses a pull-out bed and an installation and use method thereof, comprising a bottom plate and a bed support, wherein guide rails are provided inside the bottom plate near the four corners, and rollers corresponding to the guide rails are provided at the lower part of the bed support, wherein the guide rails include guide grooves, and the rollers are located in the guide grooves and can move along the guide grooves, and the bed support comprises two side plates, a foot plate and a head plate, wherein the side plates and the foot plate are located outside the bottom plate, and the head plate is located above the bottom plate, and the two ends of the foot plate are connected to one end of the two side plates, and the two ends of the head plate are connected to the other ends of the two side plates. The present invention can realize the pull-out design of the bed support through the cooperation of the rollers and the guide rails, which is not only convenient for the staff to lay the sheets, but also convenient for cleaning.
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Description

Technical Field

[0001] The present invention relates to furniture, and more particularly to a pull-out bed and an installation and use method thereof. Background Art

[0002] Among various kinds of furniture, bed is an indispensable piece of furniture in bedroom. Bed comprises bed frame and mattress. When bed is in use, a bed sheet is often spread on bed. In existing bed, mattress is directly embedded in bed frame, which can prevent mattress from sliding. However, when spreading bed sheet, it is difficult to stuff bed sheet into the gap between mattress and bed frame backrest, so it is difficult to spread bed sheet and it is difficult to clean the gap between mattress and bed frame. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and to provide a pull-out bed and an installation and use method. Through the cooperation of rollers and guide rails, a pull-out design of the bed support can be realized, which is not only convenient for the staff to lay the sheets, but also convenient for cleaning.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a pull-out bed, comprising a base plate and a bed support, wherein guide rails are provided inside the base plate near the four corners, and rollers corresponding to the guide rails are provided at the lower part of the bed support, and the guide rails include guide grooves, and the rollers are located in the guide grooves and can move along the guide grooves, and the bed support includes two side panels, a foot board and a head board, the side panels and the foot board are located on the outside of the base plate, and the head board is located above the base plate, and the two ends of the foot board are connected to one end of the two side panels, and the two ends of the head board are connected to the other end of the two side panels.

[0005] Furthermore, the bottom contour of the guide groove is sequentially a first arc groove, a slope, a protrusion and a second arc groove, the roller can roll along the bottom of the guide groove, the lowest end of the first arc groove is lower than the lowest end of the slope, the protrusion is higher than the highest end of the inclined section, the lowest end of the second arc groove is higher than the highest end of the slope and lower than the protrusion, and the direction in which the roller moves from the first arc groove to the second arc groove is the pulling direction of the bed support.

[0006] Furthermore, a metal plate is fixed in the guide groove, and the metal plate fits the contour of the bottom of the guide groove.

[0007] Furthermore, bending portions are respectively provided at both ends of the metal plate, and dovetail grooves are provided on both sides of the guide rail in the length direction of the guide groove, and the bending portions are located in the dovetail grooves.

[0008] Furthermore, a latch is fixed in the dovetail groove, a second limiting groove is provided in the latch, and an inner wall of the bending portion is closely attached to a side of the second limiting groove facing the guide groove.

[0009] Furthermore, the latch is a metal piece, and the second limiting groove has an inclined surface on one side facing the guide groove, and the inclined surface is inclined from top to bottom toward the guide groove.

[0010] Furthermore, a stopper is provided in the two guide rails near the footboard, and a mounting groove is provided in the guide rail near the footboard. The stopper is installed in the mounting groove. The stopper is located between the first arc groove and the slope, and the stopper can move up and down so that the roller can pass over the stopper.

[0011] Furthermore, the side of the stopper facing the first arc-shaped groove is a vertical surface, and the roller can abut against the vertical surface. The side of the stopper facing the slope is an arc surface, and when the stopper is located at the top, the arc surface is tangent to the slope.

[0012] Furthermore, a screw is fixed at the bottom of the mounting groove, and a spring is sleeved on the outer side of the screw, the upper end of the spring abuts against the lower part of the block and the lower end abuts against the bottom of the mounting groove, the block includes an avoidance hole, the upper end of the screw is inserted into the avoidance hole, first limiting grooves are provided on both sides of the mounting groove, limiting ribs are provided on both sides of the block, the limiting ribs are inserted into the first limiting grooves, the metal plate includes a through hole, the block passes through the through hole, and the upper part of the limiting rib can abut against or detach from the lower part of the metal plate.

[0013] A method for installing and using a pull-out bed, including an installation method and a use method; The installation method includes the following steps: S1. Fix four guide rails to the first support rod of the base plate by bolts; S2, installing the roller corresponding to the guide rail at the lower part of the second support rod of the bed support; S3, place the bed support on the bottom plate, and insert the four rollers into the corresponding guide grooves respectively; Before step S1, the guide rail is assembled, and the assembly process of the guide rail includes installing a metal plate, a latch, a stopper, a screw and a spring; Install the latch, insert the latch into the dovetail groove from the side of the dovetail groove of the guide rail and fix it; Install the screw and spring, insert the screw into the installation groove of the guide rail from bottom to top, the screw and the guide rail are connected by threads, and then the spring is sleeved on the outside of the screw; Install the block, insert the block into the installation groove, and insert the upper end of the screw into the avoidance hole of the block; Installing metal panels; ① Use a stamping die to make the metal plate into a structure consistent with the bottom contour of the guide groove; ②. Place the stamped metal plate into the guide groove; ③. Bend the two sides of the metal plate and insert the two sides of the metal plate into the second limiting groove of the latch to fix it; ④. Complete the installation of metal plates.

[0014] The method of use includes the following steps: ①. Hold the footboard and pull the bed support upwards so that the roller is above the stopper; ② When the roller is higher than the stopper, pull out the bed support, and the bed support moves, so that the roller passes over the stopper until the roller is in the second arc groove; ③. Complete the pulling out of the bed support.

[0015] In summary, the present invention has the following beneficial effects: 1. When in use, the mattress is placed on the upper part of the bed support. When it is necessary to lay the bed sheet, the operator can hold the footboard of the bed with his hand and pull the bed support to make the headboard away from the head of the bed. At this time, it can not only clean the gap at the head of the bed, but also facilitate the laying of the bed sheet, which is easy to operate; 2. When the base plate and the bed support are installed, the roller is located in the first arc-shaped groove. Since the lowest end of the first arc-shaped groove is lower than the lowest end of the slope, it can limit the roller to a certain extent, thereby preventing the bed support from moving easily. By setting the slope, it can not only prevent the bed support from moving freely, but also facilitate the resetting of the bed support, thus saving time and effort. By setting the protrusion and the second arc-shaped groove, when the bed support is pulled open, the roller can be located in the second arc-shaped groove, and the protrusion can limit the roller to a certain extent, thereby preventing the bed support from moving and resetting when cleaning the gap at the head of the bed or laying sheets, thus facilitating operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A sectional view of the main view of the present invention; Figure 2 A sectional view of a side view of the present invention; Figure 3 for Figure 2 A magnified view at point A; Figure 4 It is a schematic diagram of the structure of the guide rail at the end of the bed; Figure 5 This is an exploded view of the rail at the end of the bed; Figure 6 It is a cross-sectional view of the guide rail at the head of the bed; Figure 7 It is a cross-sectional view of the guide rail at the end of the bed; Figure 8 for Figure 7 A partial schematic diagram of Fig. 9 for Figure 7 Enlarged view at B; Fig.10 Schematic diagram of the base plate units being spliced ​​together to form the base plate.

[0017] Figure numerals: 1. bottom plate; 11. first support rod; 2. bed support; 21. side plate; 22. foot board; 23. head board; 24. second support rod; 3. guide rail; 31. guide groove; 32. first arc groove; 33. ramp; 34. second arc groove; 35. protrusion; 36. dovetail groove; 37. mounting groove; 38. first limiting groove; 4. roller; 5. metal plate; 51. bending portion; 52. through hole; 6. latch; 61. second limiting groove; 7. stopper; 71. vertical portion; 72. arc portion; 73. avoidance hole; 74. limiting rib; 8. screw; 9. spring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] like Figures 1 to 10 As shown, this embodiment discloses a pull-out bed and an installation and use method, a pull-out bed, including a bottom plate 1 and a bed support 2, wherein guide rails 3 are provided near the four corners of the bottom plate 1, and rollers 4 corresponding to the guide rails 3 are provided at the lower part of the bed support 2, a first support rod 11 is fixed inside the bottom plate 1, the guide rail 3 is fixed to the first support rod 11 of the bottom plate 1 by bolts, a second support rod 24 is fixed inside the bed support 2, and the roller 4 is installed at the lower part of the second support rod 24 of the bed support 2, the guide rail 3 includes a guide groove 31, the roller 4 is located in the guide groove 31 and can move along the guide groove 31, and the bed support 2 includes two side panels 21, a footboard 22 and a headboard 23, the side panels 21 and the footboard 22 are located outside the bottom panel 1, the headboard 23 is located above the bottom panel 1, both ends of the footboard 22 are connected to one end of the two side panels 21, and both ends of the headboard 23 are connected to the other ends of the two side panels 21. When in use, a mattress (not shown in the figure) is placed on the upper part of the bed support 2. When it is necessary to lay a bed sheet, the operator can hold the footboard 22 with his hand and pull the bed support 2 to make the headboard 23 away from the head of the bed (not shown in the figure). At this time, not only can the hygiene at the gap at the head of the bed be cleaned, but also the laying of the bed sheet can be facilitated, and the operation is convenient.

[0020] like Figure 3 , Figure 5 and Figure 6As shown, the bottom contour of the guide groove 31 is sequentially a first arc groove 32, a slope 33, a protrusion 35 and a second arc groove 34. The roller 4 can roll along the bottom of the guide groove 31. The lowest end of the first arc groove 32 is lower than the lowest end of the slope 33. The protrusion 35 is higher than the highest end of the oblique section. The lowest end of the second arc groove 34 is higher than the highest end of the slope 33 and lower than the protrusion 35. The direction in which the roller 4 moves from the first arc groove 32 to the second arc groove 34 is the pulling direction of the bed support 2.

[0021] When the base plate 1 and the bed support 2 are installed, the roller 4 is located in the first arc-shaped groove 32. Since the lowest end of the first arc-shaped groove 32 is lower than the lowest end of the slope 33, it can play a slight limiting role on the roller 4, and can prevent the bed support 2 from moving easily. By setting the slope 33, not only can the free movement of the bed support 2 be avoided, but also the resetting of the bed support 2 can be facilitated, saving time and effort. By setting the protrusion 35 and the second arc-shaped groove 34, when the bed support 2 is pulled open, the roller 4 can be located in the second arc-shaped groove 34, and the protrusion 35 can play a slight limiting role on the roller 4, thereby preventing the bed support 2 from moving and resetting when cleaning the gap at the head of the bed or laying the sheets, which is convenient for operation.

[0022] A metal plate 5 is fixed in the guide groove 31, and the metal plate 5 fits the contour of the bottom of the guide groove 31. The guide rail 3 in the present invention is a wooden structure. Therefore, laying the metal plate 5 in the guide groove 31 can effectively improve the structural strength of the guide rail 3, thereby effectively avoiding deformation of the guide rail 3 and increasing the service life of the guide rail 3. In addition, the surface of the metal plate 5 is smooth, which is conducive to the movement of the bed support 2.

[0023] The two ends of the metal plate 5 are respectively provided with a bending portion 51, and the inside of the guide rail 3 is provided with a dovetail groove 36 on both sides of the length direction of the guide groove 31. The bending portion 51 is located in the dovetail groove 36. Specifically, a latch 6 is fixed in the dovetail groove 36, and a second limiting groove 61 is provided in the latch 6. The inner wall of the bending portion 51 is close to the second limiting groove 61 facing the guide groove 31. The latch 6 is a metal part, and the second limiting groove 61 is an inclined surface on the side facing the guide groove 31. The inclined surface is inclined from top to bottom toward the guide groove 31. When installing the metal plate 5, the metal plate 5 is laid in the guide groove 31, and then the two ends of the metal plate 5 are bent by a tool and embedded in the second limiting groove 61, so as to fix the metal plate 5. In order to ensure the ductility of the metal plate 5, the thickness of the metal plate 5 is set to 0.5 mm. If the metal plate 5 is fixed with screws, the surface of the metal plate 5 will be uneven. Therefore, the screwless fixation of the metal plate 5 is not only convenient and reliable, but also can ensure the smoothness of the surface of the metal plate 5, so as to facilitate the movement of the bed support 5.

[0024] Wherein, a stopper 7 is provided in the two guide rails 3 near the footboard 22, and a mounting groove 37 is provided in the guide rail 3 near the footboard 22. The stopper 7 is installed in the mounting groove 37, and the stopper 7 is located between the first arc groove 32 and the slope 33. The stopper 7 can move up and down so that the roller 4 can pass over the stopper 7. Specifically, the side of the stopper 7 facing the first arc groove 32 is a vertical surface 71, and the roller 4 can abut against the vertical surface 71. By setting the vertical surface 71, when the roller 4 is located in the first arc groove 32 at the foot of the bed, it can limit the roller 4 at this location to prevent the bed support 2 from moving. The side of the stopper 7 facing the slope 33 is an arc surface 72. When the stopper 7 is located at the top, the arc surface 72 is tangent to the slope 33. By setting the arc surface 72, when the bed support 2 is reset, the roller 4 rotates to the arc surface 72 after being accelerated by the slope 33. The stopper 7 is squeezed and the stopper 7 is lowered, so that the stopper 7 can pass the stopper 7 and enter the first arc groove 32. A screw 8 is fixed at the bottom of the installation groove 37. A spring 9 is sleeved on the outer side of the screw 8. The upper end of the spring 9 abuts against the lower part of the stopper 7 and the lower end abuts against the bottom of the installation groove 37. The stopper 7 includes an avoidance hole 73. The upper end of the screw 8 is inserted into the avoidance hole 73. First limiting grooves 38 are provided on both sides of the installation groove 37. Limiting ribs 74 are provided on both sides of the stopper 7. The limiting ribs 74 are inserted into the first limiting grooves 38. The metal plate 5 includes a through hole 52. The stopper 7 passes through the through hole 52. The upper part of the limiting rib 74 can abut against or be separated from the lower part of the metal plate 5. Through the cooperation of the limiting rib 74 and the first limiting groove 38, not only can the stopper 7 be guided to move, but the metal plate 5 is directly covered on the limiting rib 74, so that the stopper 7 can be limited to prevent the stopper 7 from falling off.

[0025] By setting a stopper 7 in the guide rail 3 at the footboard 22, the bed support 2 can be effectively prevented from shaking when people are sleeping, thereby improving the stability of the bed support 2. When pulling out the bed support 2, it is only necessary to lift the footboard 21 first, and then pull the footboard 22, so that the roller 4 can pass the stopper 7 to realize the movement of the bed support 2, which is easy to operate.

[0026] A method for installing and using a pull-out bed, including an installation method and a use method; The installation method includes the following steps: S1, fixing the four guide rails 3 to the first support rods 11 of the base plate 1 by means of bolts; S2, installing the roller 4 corresponding to the guide rail 3 on the lower part of the second support rod 24 of the bed support 2; S3, placing the bed support 2 on the bottom plate 1, and inserting the four rollers 4 into the corresponding guide grooves 31 respectively; It can be seen that by designing the base plate 1 and the bed support 2 to be split, not only is the installation convenient, but the bed support 2 can also be moved.

[0027] Before step S1, the guide rail 3 is assembled, and the assembly process of the guide rail 3 includes installing the metal plate 5, the latch 6, the stopper 7, the screw 8 and the spring 9; Install the latch 6, insert the latch 6 into the dovetail groove 36 from the side of the dovetail groove 36 of the guide rail 3 and fix it; Install the screw 8 and the spring 9, insert the screw 8 into the installation groove 37 of the guide rail 3 from bottom to top, the screw 8 and the guide rail 3 are connected by threads, and then the spring 9 is sleeved on the outside of the screw 8; Install the stopper 7, insert the stopper 7 into the installation groove 37, and insert the upper end of the screw 8 into the avoidance hole 73 of the stopper 7; Install the metal plate 5; ①, using a stamping die to make the metal plate 5 into a structure consistent with the bottom contour of the guide groove 31; ②, place the stamped metal plate 5 into the guide groove 31; ③, bend the two sides of the metal plate 5, and insert the two sides of the metal plate 5 into the second limiting groove 61 of the latch 6 to fix; ④. Complete the installation of the metal plate 5.

[0028] The guide rail 3 and the metal plate 5 are fixed without screws, which is not only convenient for fixing, but also can greatly increase the assembly speed of the guide rail 3 and improve production efficiency.

[0029] The method of use includes the following steps: ①, hold the footboard 22 and pull the bed support 2 upwards, so that the roller 4 is higher than the stopper 7; ②, when the roller 4 is higher than the stopper 7, the bed support 2 is pulled out, and the bed support 2 moves, and the roller 4 passes over the stopper 7 until the roller 4 is located in the second arc groove 34; ③. Complete the pulling out of the bed support 2; ④. When resetting, the bed support 2 can be moved and reset just by pushing the bed support 2.

[0030] like Fig.10 As shown, when the width h of the bottom plate 1 is greater than 1.5 m, for the convenience of transportation, the bottom plate 1 and the bed support 2 can be split into two, and the two bottom plate units 1a and 1b are fixed by bolts to form a complete bottom plate 1. The two bed support units (not shown in the figure) can also be connected by bolts to form a complete bed support 2.

[0031] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A pulling bed, characterized in that: The invention comprises a bottom plate (1) and a bed support (2), wherein guide rails (3) are arranged near four corners of the bottom plate (1), and rollers (4) corresponding to the guide rails (3) are arranged at the lower part of the bed support (2), wherein the guide rails (3) comprise guide grooves (31), and the rollers (4) are located in the guide grooves (31) and can move along the guide grooves (31); the bed support (2) comprises two side plates (21), a foot plate (22) and a head plate (23), wherein the side plates (21) and the foot plate (22) are located outside the bottom plate (1), and the head plate (23) is located above the bottom plate (1), and the two ends of the foot plate (22) are connected to one end of the two side plates (21), and the two ends of the head plate (23) are connected to the other end of the two side plates (21).

2. A pulling machine according to claim 1, characterized in that: The bottom profile of the guide groove (31) is sequentially a first arc groove (32), a slope (33), a protrusion (35) and a second arc groove (34); the roller (4) can roll along the bottom of the guide groove (31); the lowest end of the first arc groove (32) is lower than the lowest end of the slope (33); the protrusion (35) is higher than the highest end of the oblique section; the lowest end of the second arc groove (34) is higher than the highest end of the slope (33) and lower than the protrusion (35); and the direction in which the roller (4) moves from the first arc groove (32) to the second arc groove (34) is the pulling direction of the bed support (2).

3. A pulling machine according to claim 2, characterized in that: A metal plate (5) is fixed in the guide groove (31), and the metal plate (5) fits the contour of the bottom of the guide groove (31).

4. A pulling machine according to claim 3, characterized in that: The two ends of the metal plate (5) are respectively provided with bending portions (51), and the inside of the guide rail (3) is provided with dovetail grooves (36) on both sides of the guide groove (31) in the length direction, and the bending portions (51) are located in the dovetail grooves (36).

5. A pulling machine according to claim 4, characterized in that: A latch pin (6) is fixed in the dovetail groove (36), a second limiting groove (61) is provided in the latch pin (6), and an inner wall of the bent portion (51) is closely attached to a side of the second limiting groove (61) facing the guide groove (31).

6. A pulling machine according to claim 5, characterized in that: The latch pin (6) is a metal part, and the second limiting groove (61) has an inclined surface on one side facing the guide groove (31), and the inclined surface is arranged to be inclined from top to bottom toward the guide groove (31).

7. A pulling machine according to claim 3, characterized in that: A stopper (7) is provided in the two guide rails (3) near the footboard (22); a mounting groove (37) is provided in the guide rail (3) near the footboard (22); the stopper (7) is installed in the mounting groove (37); the stopper (7) is located between the first arc-shaped groove (32) and the slope (33); and the stopper (7) can move up and down so that the roller (4) can pass over the stopper (7).

8. A drawing bed according to claim 7, characterized in that: The side of the stopper (7) facing the first arc-shaped groove (32) is a vertical surface (71), and the roller (4) can abut against the vertical surface (71). The side of the stopper (7) facing the slope (33) is an arc surface (72), and when the stopper (7) is located at the uppermost position, the arc surface (72) is tangent to the slope (33).

9. A pulling machine according to claim 7, characterized in that: A screw rod (8) is fixed at the bottom of the installation groove (37), a spring (9) is sleeved on the outer side of the screw rod (8), the upper end of the spring (9) abuts against the lower part of the stopper (7) and the lower end abuts against the bottom of the installation groove (37), the stopper (7) comprises an avoidance hole (73), the upper end of the screw rod (8) is inserted into the avoidance hole (73), first limiting grooves (38) are provided on both sides of the installation groove (37), limiting ribs (74) are provided on both sides of the stopper (7), the limiting ribs (74) are inserted into the first limiting grooves (38), the metal plate (5) comprises a through hole (52), the stopper (7) passes through the through hole (52), and the upper part of the limiting rib (74) can abut against or be separated from the lower part of the metal plate (5).

10. The installation and use method of a pull-out bed according to claim 2 is applied to a pull-out bed according to any one of claims 1 to 9, characterized in that: Including installation method and usage method; The installation method includes the following steps: S1, fixing four guide rails (3) to the first support rod (11) of the base plate (1) by means of bolts; S2, installing the roller (4) corresponding to the guide rail (3) on the lower part of the second support rod (24) of the bed support (2); S3, placing the bed support (2) above the bottom plate (1), and inserting the four rollers (4) into the corresponding guide grooves (31) respectively; Before step S1, the guide rail (3) is assembled, and the assembly process of the guide rail (3) includes installing a metal plate (5), a latch (6), a stopper (7), a screw (8) and a spring (9); Install the latch (6), insert the latch (6) into the dovetail groove (36) from the side of the dovetail groove (36) of the guide rail (3) and fix it; Install the screw rod (8) and the spring (9), insert the screw rod (8) from bottom to top into the installation groove (37) of the guide rail (3), the screw rod (8) and the guide rail (3) are connected by threads, and then the spring (9) is sleeved on the outside of the screw rod (8); Install the stopper (7), insert the stopper (7) into the installation groove (37), and insert the upper end of the screw rod (8) into the avoidance hole (73) of the stopper (7); Installing the metal plate (5); ①, using a stamping die to make the metal plate (5) into a structure consistent with the bottom contour of the guide groove (31); ②, placing the stamped metal plate (5) into the guide groove (31); ③. Bend the two sides of the metal plate (5) and insert the two sides of the metal plate (5) into the second limiting groove (61) of the latch (6) to fix them; ④. Complete the installation of the metal plate (5). The method of use includes the following steps: ①, hold the footboard (22) and pull the bed support (2) upwards so that the roller (4) is above the stopper (7); ②, when the roller (4) is located above the stopper (7), the bed support (2) is pulled out, the bed support (2) moves, and the roller (4) passes over the stopper (7) until the roller (4) is located in the second arc groove (34); ③. Complete the pulling out of the bed support (2).