Electric lifting back-pushing bed frame

Abstract

The invention discloses an electric lifting back pushing bed frame which comprises a fixed support, a movable support and a linear actuator. The fixing support is provided with a sheet metal part arranged in the width direction and / or the length direction of the electric lifting back pushing bed frame. The connecting piece comprises a connecting part and a mounting part, and the connecting part is slidably connected to the sheet metal part in the length direction of the sheet metal part; the connecting part is sequentially provided with two supporting points in the length direction, and the two supporting points are located on the upper side and the lower side of the connecting part correspondingly and abut against the sheet metal part correspondingly. Under the action of gravity of the electric lifting back pushing bed frame, friction force is generated between the connecting part and the sheet metal part through the two supporting points in a shearing mode, and then position locking is kept. The electric lifting back-pushing bed frame can be better matched with existing bed frame enclosure frames with different widths and sizes, the defect that installation is not in place is overcome, safety is good, and installation operation is easy and saves labor.

Description

Technical Field

[0001] This application relates to the field of electric furniture technology, specifically to an electric lifting and backrest bed frame. Background Technology

[0002] Electric beds, with their adjustable postures (lying down, sitting, etc.), can alleviate fatigue and are therefore very popular. To enable ordinary beds to also offer this adjustment function, electrically adjustable support devices are installed under the mattress. These devices, also known as backrest supports or electric lifting backrest supports, are independently configured components. Users simply place the device on the bed frame under the mattress and adjust its height to adjust the height and tilt angle of the softer mattress above it, thus giving the ordinary bed mattress height adjustment capabilities.

[0003] The related technology, an electric lifting and backrest bed frame, includes a fixed frame and a backrest support. The fixed frame is placed on a prior art bed frame and located on the side near the head of the bed. One end of the backrest support is rotatably connected to one end of the fixed frame via a rotating shaft, which allows the backrest support to rotate relative to the fixed frame around the rotating shaft. A linear actuator is provided between the fixed frame and the backrest support, with one end of the linear actuator hinged to the fixed frame and the other end hinged to the backrest support, for driving the backrest support to rotate and supporting the load-bearing capacity of the backrest support, as in the structure of the backrest bed frame in the applicant's earlier application with publication number CN115500645A.

[0004] As is well known, existing bed frames include a bed surround and a bed board connected within the bed surround. Support bars for mounting the bed board are connected to the inner wall of the bed surround along the length of the bed frame. When purchasing an electric lift-up bed frame, users need to accurately determine the width of their existing bed frame, that is, the distance between the two inner walls of the bed surround along the width of the bed frame, and then select a lift-up bed frame that matches its dimensions. The dimensions of most lift-up bed frames are designed according to the dimensions of standard-width beds, such as widths of 0.9 meters and 1.2 meters to fit single beds, and widths of 1.5 meters, 1.8 meters, and 2 meters to fit double beds. However, inevitably, for beds of special or non-standard sizes, or custom-made sizes, the lift-up bed frame purchased by the user often does not fit well. Even if it can be placed on the bed frame, there is a large gap in the width direction of the bed frame, posing a safety hazard. To better accommodate the width of existing bed frames, adjustable-width backrest bed frames have been developed. For example, the electric bed frame disclosed in patent application CN106954973A has an adjustable width and includes a long strip of sheet metal and connecting parts. The sheet metal is connected to the outer frame of the bed frame. One end of the connecting part is an insertion part, shaped to insert into and slide within the sheet metal, while the other end has a fixing part for securing it to the frame. The distance between the connecting part and the sheet metal is adjusted to accommodate existing bed frame frames of different widths. A bolt assembly is threaded onto the sheet metal, and the inner end of the bolt assembly presses against the insertion part of the connecting part to lock it in place. Another common type of adjustable-width backrest bed frame on the market uses a bolt assembly that passes through the sheet metal and connecting parts sequentially and is then locked with a nut.

[0005] The adjustable-width electric bed frames described above have the following drawbacks during actual installation: Before installation, users need to measure the width of their existing bed frame, loosen the bolts of the electric bed frame locking connector, adjust the connector to the appropriate extension length, tighten the bolts, and finally install the electric bed frame onto the existing bed frame. However, due to unavoidable measurement errors and errors in the extension length of the connector, the adjusted width of the electric bed frame often does not match the width of the existing bed frame or is difficult to install properly, resulting in gaps and requiring multiple adjustments and installations, making the operation cumbersome and laborious. If the extension length of the connector is directly adjusted on the bed frame surround to match the width of the existing bed frame, the weight of the electric bed frame causes significant friction between the connector and the sheet metal parts, making it difficult to pull the connector out. Additional personnel are needed to lift the electric bed frame, further complicating the operation and requiring considerable effort. Furthermore, using the inner end of the bolt assembly to tighten the insertion part to lock the connector results in poor stability of the connector locking due to the small contact area between the inner end of the bolt assembly and the insertion part of the connector. This is especially true during the raising and lowering of the electric bed frame, where the bolt assembly can easily loosen, causing the connector to retract and creating a safety hazard. In addition, the method of passing the bolt assembly through the sheet metal part and the connector in sequence and then locking it with a nut is problematic because the bolt assembly must both lock the extension length of the connector and bear the weight of the bed frame. Therefore, after adjusting the extension length of the connector directly on the bed frame, when tightening the bolt assembly, someone needs to lift the electric bed frame to eliminate the influence of the electric bed frame's own weight; otherwise, it is difficult to tighten the bolt assembly to lock the connector. Summary of the Invention

[0006] The technical problem to be solved by this application is to overcome the defects of the above-mentioned related technologies and provide an electric lifting and back-pushing bed frame that can not only better adapt to existing bed frame frames of different widths and avoid defects in improper installation, but also has good safety, and is simple and labor-saving to install and operate.

[0007] The technical solution of this application is to provide an electrically adjustable and push-back bed frame with the following structure: including...

[0008] A fixed bracket, a movable bracket rotatably connected to the fixed bracket, and a linear actuator connecting the movable bracket and the fixed bracket to drive the movable bracket to rotate relative to the fixed bracket; the fixed bracket has sheet metal parts arranged along the width direction and / or length direction of the electric lifting back push bed frame;

[0009] At least one connector, the connector including a connecting portion and a mounting portion connected to the free end of the connecting portion and for mounting to a bed frame frame, the connecting portion being slidably connected to the sheet metal part along its length direction, for adjusting the distance of the mounting portion relative to the sheet metal part; and

[0010] The connecting part is provided with two support points in sequence along its length. The two support points are located on the upper and lower sides of the connecting part and abut against the sheet metal part respectively; or the sheet metal part is provided with two support points in sequence along its length. The two support points are located on the upper and lower sides of the sheet metal part and abut against the connecting part respectively; under the action of the gravity of the electric lifting back push bed frame, the connecting part and the sheet metal part are held in place by shearing friction through the two support points.

[0011] In some embodiments, a locking mechanism is connected between the connecting portion and the sheet metal part for locking the connecting portion at any position of its travel, wherein the locking mechanism is arranged in a horizontal direction.

[0012] In some embodiments, the locking mechanism includes a locking rod assembly connected to the connecting portion, and the sheet metal part has a guide hole extending along the length direction, the locking rod assembly passing through the guide hole; or

[0013] The locking mechanism includes a locking rod assembly connected to the sheet metal part, and the connecting part is provided with a guide hole extending along the length direction, the locking rod assembly passing through the guide hole.

[0014] In some embodiments, the connecting portion is slidably sleeved on the free end of the sheet metal part, and the end of the connecting portion away from the mounting portion is connected to a first support plate that slidably fits against the top of the sheet metal part, and the end of the connecting portion near the mounting portion is connected to a second support plate that slidably fits against the bottom of the sheet metal part, wherein the first support plate and the second support plate form two support points.

[0015] In some embodiments, the first support plate, the second support plate, and the connecting portion are integrally bent metal sheet structures.

[0016] In some embodiments, the connecting portion is slidably sleeved in the inner hole of the sheet metal part, and a first support block that protrudes downward and slides against the inner wall of the sheet metal part is connected to the bottom of the end of the connecting portion away from the mounting portion, and a second support block that protrudes upward and slides against the inner wall of the sheet metal part is connected to the top of the end of the connecting portion near the mounting portion, and the first support block and the second support block form two support points.

[0017] In some embodiments, the connecting portion is slidably sleeved in the inner hole of the sheet metal part, and a first protrusion that protrudes upward and slides against the bottom of the connecting portion is connected to the inner bottom wall of the inner hole of the sheet metal part, and a second protrusion that protrudes downward and slides against the top of the connecting portion is connected to the inner top wall of the inner hole of the sheet metal part, and the first protrusion is located on the side away from the mounting portion compared to the second protrusion, and the first protrusion and the second protrusion form two support points.

[0018] In some embodiments, the sheet metal part is a hollow sleeve with a circular or square cross-section; or the sheet metal part is a channel-shaped part.

[0019] In some embodiments, the connectors are multiple and are respectively disposed on opposite sides of the electric lifting back push bed frame in the width direction and / or length direction.

[0020] In some embodiments, the connecting end of the fixed bracket is connected to a support frame that extends downward and is inclined toward the free end of the fixed bracket, and the support frame has mounting points formed thereon; the linear actuator includes an actuator body and a drive end that reciprocates axially relative to the actuator body, the drive end or the actuator body is rotatably connected to the movable bracket, and the actuator body or the drive end is rotatably connected to the mounting points.

[0021] In summary, compared with related technologies, the electric lifting and pushing bed frame of this application has the following advantages: Because the connecting part of the connecting member can slide along the length of the sheet metal part, the distance between the mounting part and the sheet metal part is adjustable. This allows for adjustment of the width of the fixed bracket by adjusting the extension length of the connecting member, thus making it compatible with existing bed frame frames of different widths and offering strong versatility. When installing the electric lifting and pushing bed frame on an existing bed frame, there is no need to accurately compare their widths. Simply place the electric lifting and pushing bed frame horizontally on the frame, then pull the mounting part of the connecting member outwards until it abuts against and is fixed to the frame. This allows the width of the fixed bracket to better match the width between existing bed frame frames, effectively avoiding defects such as gaps caused by improper installation. No need for repeated adjustments to the extended length of the connector, making installation simple and effortless. More importantly, the two support points on the connector or sheet metal part, under the weight of the electric lifting and pushing bed frame, allow the connector and sheet metal part to be locked in position by shearing through the two support points. That is, under the weight of the electric lifting and pushing bed frame, friction and shearing forces are generated between the connector and sheet metal part at the two support points, as well as in the direction other than the sliding of the connector. This not only makes the connector more secure, stable, and safe, but also effectively reduces the contact area between the connector and the sheet metal part. Therefore, the connector can be easily pulled out without lifting the electric bed frame, making the entire installation process simple and effortless. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of an electrically operated lifting and back-pushing bed frame according to some embodiments of this application.

[0023] Figure 2 This is a schematic diagram of the electric lifting backrest bed frame from another angle according to some embodiments of this application.

[0024] Figure 3 This is a side view of an electrically operated lifting and pushing bed frame according to some embodiments of this application.

[0025] Figure 4 This is a schematic diagram of the structure of a connector according to some embodiments of this application.

[0026] Figure 5 This is a schematic diagram of the connector from another angle according to some embodiments of this application.

[0027] Figure 6 This is a schematic diagram of the assembly structure of the connector according to some embodiments of this application.

[0028] Figure 7 This is a schematic diagram of the assembly structure of the connector according to some embodiments of this application from another angle.

[0029] Figure 8 This is a cross-sectional schematic diagram of the assembly structure of the connector according to some embodiments of this application.

[0030] Figure 9 This is a structural schematic diagram of a connector according to some other embodiments of this application.

[0031] Figure 10 This is a schematic diagram of the assembly structure of the connector according to some other embodiments of this application.

[0032] Figure 11 This is a cross-sectional schematic diagram of the assembly structure of the connector according to some other embodiments of this application.

[0033] Figure 12 This is an installation diagram of the connector according to some other embodiments of this application.

[0034] Figure 13 This is a schematic diagram of a connector installation according to some embodiments of this application.

[0035] Figure 14 This is a schematic diagram of another connector installation according to some embodiments of this application.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Fixed bracket; 100. Sheet metal part; 101. Support frame; 102. Guide hole; 103. First protrusion; 104. Second protrusion; 2. Movable bracket; 3. Linear actuator; 300. Actuator body; 301. Drive end; 302. Drive motor; 4. Connector; 400. Connecting part; 401. Mounting part; 402. First support plate; 403. Second support plate; 404. Connecting hole; 405. Mounting hole; 406. First support block; 407. Second support block; 5. Locking rod assembly. Detailed Implementation

[0038] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0039] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0040] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0042] See Figures 1 to 8As shown in the figure; this application discloses an electric lifting backrest bed frame, which is used to be installed on the frame of an existing bed frame. Its structure includes a fixed bracket 1, a movable bracket 2, and a linear actuator 3. The fixed bracket 1, also called a fixed bed frame or base frame, is a square structure welded from metal pipes. The fixed bracket 1 is used to connect between the frames of the existing bed frame, and the end of the fixed bracket 1 away from the head of the bed is set as the connecting end. The movable bracket 2, also called a movable bed frame or backrest frame, is also a square structure welded from metal pipes. The end of the movable bracket 2 away from the head of the bed is rotatably connected to the connecting end of the fixed bracket 1 through a rotating shaft, so that the movable bracket 2 can rotate around the axis of the rotating shaft to adjust the angle.

[0043] Further in this embodiment, see Figure 3 As shown, the linear actuator 3 connects the fixed bracket 1 and the movable bracket 2, and is used to drive the movable bracket 2 to rotate relative to the fixed bracket 1 to adjust the tilt angle of the movable bracket 2. Specifically, the linear actuator 3 includes an actuator body 300 and a drive end 301 that reciprocates axially relative to the actuator body 300. The actuator body 300 includes a drive motor 302 and a lead screw and nut assembly that is driven by the drive motor 302. The drive end 301 is rotatably connected to the movable bracket 2, and the actuator body 300 is rotatably connected to the fixed bracket 1; or the actuator body 300 is rotatably connected to the movable bracket 2, and the drive end 301 is rotatably connected to the fixed bracket 1.

[0044] To ensure that the movable support 2 can obtain sufficient thrust when rotating upward from its initial horizontal state, or that the linear actuator 3 can provide a small thrust to rotate the movable support 2 upward from its initial horizontal state, in this embodiment, a support frame 101 extending downward and inclined towards the free end of the fixed support 1 is connected to the connecting end of the fixed support 1. Mounting points are formed on the support frame 101, and the linear actuator 3 is rotatably connected to these mounting points. The arrangement of the support frame 101 ensures that, when the movable support 2 is in its initial horizontal state, there is a large angle of inclination between the axis of the linear actuator 3 and the plane containing the movable support 2, thereby allowing more of the axial thrust of the linear actuator 3 to be converted into the thrust for the upward rotation of the movable support 2.

[0045] The linear actuator 3 in the above embodiments is a product of relatively mature existing technology, which is used to convert the rotational motion of the drive motor 302 into the axial motion of the drive end 301. In other embodiments, the linear actuator 3 may also be an electrically powered linear drive mechanism such as a linear motor or an electric actuator rod.

[0046] To ensure that the width of the fixed bracket 1 better matches the width of the existing bed frame, and also to facilitate the assembly of the electric lifting and pushing bed frame with the existing bed frame, in this embodiment, see... Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, the electric lifting and pushing bed frame also includes at least one connector 4, and the fixed bracket 1 has a sheet metal part 100 extending along the width direction and / or length direction of the electric lifting and pushing bed frame; the connector 4 includes a connecting part 400 and a mounting part 401 connected to the free end of the connecting part 400 and used for mounting to the bed frame frame, wherein the connecting part 400 is slidably connected to the sheet metal part 100 along the length direction of the sheet metal part 100, and is used to adjust the distance of the mounting part 401 relative to the sheet metal part 100.

[0047] It is easy to understand that the connector 4 can slide relative to the sheet metal part 100 along the width direction of the electric lifting back push bed frame, and adjust the extension length of the mounting part 401 of the connector 4 to adapt to the width of the existing bed frame frame; therefore, the connector 4 can be set on one side or opposite two sides or any three or four sides of the fixed bracket 1, and the number of connectors 4 can be set according to actual needs.

[0048] For example, see Figure 1 and Figure 2 As shown, in this embodiment, two parallel, elongated sheet metal parts 100 extending along the width and / or length of the electric lifting backrest bed frame are connected to the fixed bracket 1. Each sheet metal part 100 is a metal square tube, and multiple connectors 4 are provided. Each sheet metal part 100 has a connector 4 connected to both ends, thus connecting connectors 4 are provided at the four free ends of the two sheet metal parts 100. When adapting to the existing bed frame, the four connectors 4 need to be pulled outwards so that the mounting portion 401 of the connector 4 abuts against the frame, i.e., the mounting portion 401 is placed on the support mounting position inside the frame, and the end of the mounting portion 401 abuts against the inner wall of the frame. Furthermore, mounting holes 405 are provided on the mounting portion 401 of the connector 4, allowing the user to install and fix the mounting portion 401 onto the wooden bed frame frame using connecting screws inserted into the mounting holes 405.

[0049] Furthermore, in this embodiment, the electric lifting back push bed frame has a connecting part 400 of the connector 4 that can slide along the length direction of the sheet metal part 100, thereby making the distance between the mounting part 401 and the sheet metal part 100 adjustable. In other words, the width of the fixed bracket 1 can be adjusted by adjusting the extension length of the connector 4, so that it can be adapted to the frame of existing bed frames of different widths and has strong versatility.

[0050] When installing the electric lifting and pushing bed frame onto the existing bed frame, users do not need to accurately compare the width dimensions of the two. Simply place the electric lifting and pushing bed frame horizontally on the frame, then pull the mounting part 401 of the connector 4 outwards until it abuts against and is fixed to the frame. This allows the width of the fixing bracket 1 to better fit the width between the existing bed frame frames, effectively avoiding gaps caused by improper installation. There is no need to repeatedly adjust the extension length of the connector 4, making installation simple and effortless.

[0051] It is understandable that when an electric lifting and pushing bed frame is installed on the existing bed frame's perimeter, during use, especially during the height adjustment of the movable support 2, the movable support 2 rotates upwards, and the user leans against it. This forces the fixed support 1 and the connection between the fixed support 1 and the perimeter frame to withstand significant torque. If the connecting part 4 is not securely fixed to the sheet metal part 100 or the connection stability is not high, such as using screws for tightening as in the background art, the connecting part 4 can easily shift or loosen, causing the fixed support 1 to shake or tip over, posing a safety hazard. In this embodiment, to overcome the above defects, see... Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, two support points are sequentially provided along the length of the connecting part 400 of the connector 4. The two support points are located on the upper and lower sides of the connecting part 400 and abut against the sheet metal part 100 respectively. Under the action of the gravity of the electric lifting back push bed frame, the connecting part 400 and the sheet metal part 100 are locked in position by shearing through the two support points.

[0052] It is easy to understand that in the above embodiment, when the connector 4 extends relative to the sheet metal part 100 and is fixed to the frame of the existing bed frame; under the action of the weight of the electric lifting back push bed frame itself, the sheet metal part 100 applies downward pressure to the connector 4, the bottom of the sheet metal part 100 applies pressure to the support point of the connector 4 located below, and at the same time, the support point of the connector 4 located above applies pressure to the top of the sheet metal part 100. In addition, the two support points are staggered in the vertical direction; therefore, the two support points generate a shearing clamping force on the sheet metal part 100. Under the action of this clamping force, the two support points generate a frictional force on the surface of the connecting part 400 of the connector 4, realizing the self-locking of the movement of the connecting part 400.

[0053] Furthermore, in this embodiment, under the weight of the electric lifting and pushing bed frame itself, the connecting part 400 and the sheet metal part 100 are locked in position by shearing through two support points; that is, under the weight of the electric lifting and pushing bed frame itself, the connecting part 400 and the sheet metal part 100 generate friction at the two support points and shearing force in the direction other than the sliding of the connecting part 4. This not only makes the connecting part 4 more firmly and stably locked with good safety, but also effectively reduces the contact area between the connecting part 400 and the sheet metal part 100. Therefore, the connecting part 4 can be easily pulled out without lifting the electric bed frame, making the entire installation process simple and labor-saving.

[0054] It is understood that the support points in the above embodiments act as fulcrums. They can be point-shaped, block-shaped, plate-shaped, or rod-shaped support structures. The point-shaped support structure can also be understood as a protrusion. It is used to generate a shearing force on the sheet metal part 100 under the action of the weight of the electric lifting back push bed frame so that the connecting part 4 can be locked in position.

[0055] Specifically in this embodiment, see Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the connecting portion 400 of the connector 4 is slidably sleeved on the free end of the sheet metal part 100. The end of the connecting portion 400 away from the mounting portion 401 is connected to a first support plate 402 that extends upwards and bends towards the top of the sheet metal part 100, slidingly fitting against the top of the sheet metal part 100. The end of the connecting portion 400 near the mounting portion 401 is connected to a second support plate 403 that slides against the bottom of the sheet metal part 100. The first support plate 402 and the second support plate 403 form two support points. In this embodiment, the first support plate 402, the second support plate 403, and the connecting portion 400 are integrally bent metal sheet structures. A channel for the sheet metal part 100 to pass through is formed between the first support plate 402 and the second support plate 403. This connector 4 has good structural stability.

[0056] In the above embodiment, under the action of the electric lifting back push bed frame's own weight, the sheet metal part 100 applies downward pressure to the second support plate 403, while the first support plate 402 applies pressure to the top of the sheet metal part 100; in other words, under the pressure of the sheet metal part 100, the second support plate 403 applies an upward reaction force to the sheet metal part 100, and under the pressure of the sheet metal part 100, the first support plate 402 applies a downward reaction force to the sheet metal part 100. Therefore, the reaction forces applied by the second support plate 403 and the first support plate 402 to the sheet metal part 100 are in opposite directions, and the two form a shearing clamping force, thereby effectively holding the connecting piece 4 on the sheet metal part 100.

[0057] Furthermore, in this embodiment, to ensure that the connector 4 is more securely held on the sheet metal part 100 and to prevent accidental movement, a locking mechanism is connected between the connecting portion 400 of the connector 4 and the sheet metal part 100 of the electric lifting backrest bed frame. This locking mechanism is used to lock the connecting portion 400 at any position within its travel, and is arranged horizontally. That is, when the mounting portion 401 of the connector 4 extends outward and connects to the frame of the existing bed frame, the locking mechanism can be engaged, locking the connector 4 onto the sheet metal part 100 and improving safety during use.

[0058] The locking mechanism can be achieved by fasteners, or by snap-fit ​​or other limiting structures such as snap-fit ​​grooves, cam pressing mechanisms, etc., to lock the connector 4 onto the sheet metal part 100. Specifically, in this embodiment, see... Figure 6 As shown, the locking mechanism includes a locking rod assembly 5 connected to the connecting part 400, and the sheet metal part 100 is provided with a guide hole 102 extending along the length direction. The locking rod assembly 5 passes through the guide hole 102. Specifically, the locking rod assembly 5 includes a threaded locking rod and a nut that is threadedly connected to the threaded part of the locking rod. The connecting part 400 is provided with a connecting hole 404 in the transverse direction. The locking rod passes through the connecting hole 404 and the guide hole 102 in sequence and is threadedly connected to the nut. Tightening or loosening the nut can lock or unlock the connecting part 4.

[0059] In the above embodiments, in addition to locking the connector 4 and the sheet metal 100, the locking rod assembly 5 passes through the guide hole 102. The locking rod assembly 5 and the guide hole 102 are arranged in a horizontal direction rather than a vertical direction. That is, the locking force applied by the locking rod assembly 5 and the frictional force generated by the two support points in a shearing manner are not on the same plane. When the connector 4 slides relative to the sheet metal 100, the sliding cooperation between the locking rod assembly 5 and the guide hole 102 plays a guiding role, making the sliding of the connector 4 more stable.

[0060] It is easy to understand that when the electric lifting and pushing bed frame is directly placed horizontally on the frame for installation, the first support plate 402 and the second support plate 403 on the connector 4 form two support points that apply a shearing locking force to the sheet metal part 100. This means that the weight of the electric lifting and pushing bed frame is applied only to the connector 4 through the sheet metal part, while the locking rod assembly 5 bears no pressure or only a negligible pressure. Therefore, the locking rod assembly 5 only serves to lock the extended length of the connector 4. When tightening the locking rod assembly 5, there is no need for additional personnel to lift the electric bed frame to eliminate the influence of the electric lifting and pushing bed frame's own weight on the locking rod assembly 5, and there is no need to worry about the sheet metal part 100 moving during the tightening process. Therefore, the operation is simple and labor-saving, and it avoids structural failures caused by improper installation of the locking rod assembly 5, making the locking rod assembly 5 more secure and stable, and improving the safety of the structure.

[0061] In other embodiments, the locking rod assembly 5 of the locking mechanism may also be connected to the sheet metal part 100, and a guide hole extending along the length direction is provided on the connecting portion 400, through which the locking rod assembly 5 passes. (See also...) Figure 13 and Figure 14 As shown; that is, compared with the above embodiment, the positions of the locking rod assembly 5 and the guide hole 102 are interchanged between the sheet metal part 100 and the connector 4.

[0062] In some embodiments, see Figure 9 , Figure 10 and Figure 11 As shown, the sheet metal part 100 is a square metal tube. The connecting part 400 of the connector 4 is slidably sleeved in the inner hole of the sheet metal part 100. The bottom of the end of the connecting part 400 away from the mounting part 401 is connected to a first support block 406 that protrudes downward and slides against the inner wall of the sheet metal part 100. The top of the end of the connecting part 400 near the mounting part 401 is connected to a second support block 407 that protrudes upward and slides against the inner wall of the sheet metal part 100. The first support block 406 and the second support block 407 form two support points. Under the weight of the electric lifting and pushing bed frame, the sheet metal part 100 exerts downward pressure on the second support block 407, and conversely, the second support block 407 exerts an upward reaction force on the sheet metal part 100. Under the pressure of the sheet metal part 100, the first support block 406 exerts a downward reaction force on the sheet metal part 100. Therefore, the reaction forces exerted by the second support block 407 and the first support block 406 on the sheet metal part 100 are in opposite directions, forming a shearing clamping force, which effectively holds the connector 4 within the sheet metal part 100. Similarly, the first support block 406 and the second support block 407 abut against the inner wall of the inner hole of the sheet metal part 100, reducing the contact area between the connector 4 and the sheet metal part 100. This makes pulling out the connector 4 easier and facilitates the installation of the electric lifting and pushing bed frame with the existing bed frame frame.

[0063] In some embodiments, two support points may also be provided on the sheet metal part 100. For example, two support points may be provided sequentially along the length of the sheet metal part 100, with the two support points located on the upper and lower sides of the sheet metal part 100 respectively and abutting against the connecting portion 400. See details. Figure 12As shown, the sheet metal part 100 is a square metal tube. The connecting portion 400 of the connector 4 is slidably fitted inside the inner hole of the sheet metal part 100. A first protrusion 103 is connected to the inner bottom wall of the inner hole of the sheet metal part 100 and slides against the bottom of the connecting portion 400. A second protrusion 104 is connected to the inner top wall of the inner hole of the sheet metal part 100 and slides against the top of the connecting portion 400. The first protrusion 103 is located on the side away from the mounting portion 401 compared to the second protrusion 104. The first protrusion 103 and the second protrusion 104 form two support points. Similarly, the second protrusion 104 applies downward pressure to the top of the connecting portion 400, while the first protrusion 103 applies upward pressure to the bottom of the connecting portion 400. The two form a shearing clamping force, which can effectively hold the connector 4 inside the sheet metal part 100.

[0064] The sheet metal part 100 in the above embodiment is generally set as a hollow sleeve with a circular or square cross-section.

[0065] In other embodiments, the sheet metal part 100 can also be a channel-shaped part, such as a square channel steel structure, an I-beam steel structure, etc., and the connecting part 4 can also be a channel-shaped part or a metal square tube structure that is nested with and slides relative to it; such as Figure 13 As shown, the cross-sections of sheet metal part 100 and connector 4 are both set as square channel-shaped parts; for example... Figure 14 As shown, the cross-section of the sheet metal part 100 is set as a square groove, while the connector 4 is set as a metal square tube and is slidably sleeved inside the sheet metal part 100.

[0066] In the description of the embodiments of this application, it should be noted that the terms "inner" and "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0067] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0068] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An electrically operated lifting and backrest bed frame, characterized in that: include A fixed bracket, a movable bracket rotatably connected to the fixed bracket, and a linear actuator connecting the movable bracket and the fixed bracket to drive the movable bracket to rotate relative to the fixed bracket; the fixed bracket has sheet metal parts arranged along the width direction and / or length direction of the electric lifting back push bed frame; At least one connector, the connector including a connecting portion and a mounting portion connected to the free end of the connecting portion and for mounting to a bed frame frame, the connecting portion being slidably connected to the sheet metal part along its length direction, for adjusting the distance of the mounting portion relative to the sheet metal part; and The connecting part is provided with two support points in sequence along its length. The two support points are located on the upper and lower sides of the connecting part and abut against the sheet metal part respectively; or the sheet metal part is provided with two support points in sequence along its length. The two support points are located on the upper and lower sides of the sheet metal part and abut against the connecting part respectively; under the action of the gravity of the electric lifting back push bed frame, the connecting part and the sheet metal part are held in place by shearing friction through the two support points.

2. The electrically adjustable lifting and pushing bed frame according to claim 1, characterized in that: A locking mechanism is connected between the connecting part and the sheet metal part for locking the connecting part at any position of its travel, wherein the locking mechanism is arranged in the horizontal direction.

3. The electrically adjustable lifting and backrest bed frame according to claim 2, characterized in that: The locking mechanism includes a locking rod assembly connected to the connecting portion, and the sheet metal part has a guide hole extending along the length direction, the locking rod assembly passing through the guide hole; or The locking mechanism includes a locking rod assembly connected to the sheet metal part, and the connecting part is provided with a guide hole extending along the length direction, the locking rod assembly passing through the guide hole.

4. The electrically adjustable lifting and backrest bed frame according to claim 1, characterized in that: The connecting part is slidably sleeved on the free end of the sheet metal part. The end of the connecting part away from the mounting part is connected to a first support plate that slides and fits against the top of the sheet metal part, and the end of the connecting part near the mounting part is connected to a second support plate that slides and fits against the bottom of the sheet metal part. The first support plate and the second support plate form two support points.

5. The electrically adjustable lifting and backrest bed frame according to claim 4, characterized in that: The first support plate, the second support plate, and the connecting part are integrally bent metal plates.

6. The electrically adjustable lifting and back-pushing bed frame according to claim 1, characterized in that: The connecting part is slidably sleeved in the inner hole of the sheet metal part. The bottom of the connecting part away from the mounting part is connected to a first support block that protrudes downward and slides against the inner wall of the sheet metal part, and the top of the connecting part near the mounting part is connected to a second support block that protrudes upward and slides against the inner wall of the sheet metal part. The first support block and the second support block form two support points.

7. The electrically adjustable lifting and back-pushing bed frame according to claim 1, characterized in that: The connecting part is slidably sleeved in the inner hole of the sheet metal part. A first protrusion is connected to the inner bottom wall of the inner hole of the sheet metal part and slides against the bottom of the connecting part. A second protrusion is connected to the inner top wall of the inner hole of the sheet metal part and slides against the top of the connecting part. The first protrusion is located on the side away from the mounting part compared to the second protrusion. The first protrusion and the second protrusion form two support points.

8. The electrically adjustable lifting and backrest bed frame according to claim 1, characterized in that: The sheet metal part is a hollow sleeve with a circular or square cross-section; or the sheet metal part is a channel-shaped part.

9. The electrically adjustable lifting and backrest bed frame according to claim 1, characterized in that: The connecting members are multiple and are respectively arranged on opposite sides of the electric lifting back push bed frame in the width direction and / or length direction.

10. The electrically adjustable lifting and pushing bed frame according to any one of claims 1 to 9, characterized in that: The fixed bracket is connected to a support frame that extends downward and is inclined toward the free end of the fixed bracket, and the support frame has mounting points; the linear actuator includes an actuator body and a drive end that reciprocates axially relative to the actuator body, the drive end or the actuator body is rotatably connected to the movable bracket, and the actuator body or the drive end is rotatably connected to the mounting points.

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