Electric lifting back-pushing bed frame

Abstract

The utility model 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] The present application relates to the technical field of electric furniture, and specifically relates to an electric lifting back-pushing bed frame. Background Art

[0002] The electric beds in related technologies can adjust the sleeping postures, lying postures, sitting postures, etc. of users, and relieve fatigue, so they are deeply loved by users. In order to enable ordinary beds in users' homes to also have the adjustment function of electric beds, a support device with an electrically adjustable angle is installed under the mattress of the ordinary bed. This support device with an electrically adjustable angle is also called a back-pushing bed frame or an electric lifting back-pushing bed frame. It is an independently configured component. The user only needs to place the purchased support device with electric adjustment under the bed frame of the mattress, and by adjusting the height of the support device that rises, the height and inclination angle of the relatively soft mattress above the support device can be adjusted, so that the mattress of the ordinary bed has the function of height adjustment.

[0003] The electric lifting back-pushing bed frame in the related technology has a structure including a fixed frame and a backrest support. The fixed frame is placed on the bed frame of the prior art and is located on one side close to the head of the bed. One end of the backrest support is rotatably connected to one end of the fixed frame through a rotating shaft, so that the backrest support can rotate relative to the fixed frame around the rotating shaft. A linear actuator is arranged between the fixed frame and the backrest support, and one end of the linear actuator is hinged to the fixed frame, and the other end of the linear actuator is hinged to the backrest support, which is used to drive the backrest support to rotate and support the load-bearing of the backrest support. For example, the structure of the back-pushing bed frame in the prior application of the applicant of this case with the publication number of CN115500645A.

[0004] As is well known, the bed frames of the prior art include a bed rail and a bed board connected within the bed rail. A support bar for installing the bed board is connected to the inner wall of the bed rail along the length direction of the bed frame. When a user purchases this electric lift backrest bed frame, it is necessary to accurately determine the width of the existing bed frame, that is, the distance between the two inner side walls of the bed rail along the width direction of the bed frame, and then select a backrest bed frame with a size that matches it. Most of the sizes of the backrest bed frames are designed according to the sizes of standard-width beds. For example, the widths are set to 0.9 meters and 1.2 meters to match single beds, and the widths are set to 1.5 meters, 1.8 meters, and 2 meters to match double beds. However, inevitably, for beds with special sizes, non-standard sizes, or customized sizes, the purchased backrest bed frames often cannot be well adapted to the bed frames. Even if they can be placed on the bed frames, there are relatively large movement gaps in the width direction of the bed frames, presenting potential safety hazards. In order to better adapt to the width of the existing bed frames, the backrest bed frames are set to be width-adjustable. For example, in the electric bed frame disclosed in the patent application with the publication number CN106954973A, the width of the bed frame is adjustable. The bed frame includes a strip-shaped sheet metal part and a connecting part. Among them, the sheet metal part is connected to the outer frame of the bed frame. One end of the connecting part is an insertion part, and its shape is set to be able to be inserted into the sheet metal part and slide therein. The other end has a fixing part for fixing to the surrounding frame. By adjusting the distance between the connecting part and the sheet metal part, the surrounding frame of the existing bed frame with different width sizes can be adapted. Moreover, a bolt assembly is threadedly connected to the sheet metal part, and the inner end of the bolt assembly abuts against the insertion part of the connecting part to lock the connecting part. Another common backrest bed frame on the market that can adjust the width of the bed frame has the bolt assembly passing through the sheet metal part and the connecting part in sequence and then being locked by a nut.

[0005] The adjustable-width electric bed frame in the above-mentioned related technologies has the following defects in the actual installation process: Before installation, the user needs to first measure the width of the existing bed frame, then loosen the bolt assembly of the locking connection of the electric bed frame, adjust the connection to the appropriate extended length and then tighten the bolt assembly, and finally install the electric bed frame on the existing bed frame. However, due to inevitable measurement errors and errors in the extended length of the connection, it often leads to the width of the adjusted electric bed frame not matching the width of the existing bed frame or being difficult to install in place, with a clearance, and multiple adjustments and installations are required, making the operation rather troublesome and laborious; if the extended length of the connection is directly adjusted on the bed surround to match the width of the existing bed frame, due to the weight of the electric bed frame, a large frictional force will be generated between the connection and the sheet metal part, so it is very difficult to pull out the connection, and someone needs to lift the electric bed frame additionally, resulting in a rather troublesome and laborious operation. Moreover, in the way of using the inner end of the bolt assembly to press against the insertion part to lock the connection, since the contact area between the inner end of the bolt assembly and the insertion part of the connection is small, the locking stability of the connection is poor, especially during the lifting and lowering process of the electric bed frame, it is very easy for the bolt assembly to become loose and the connection to retract, causing potential safety hazards; in addition, in the way of passing the bolt assembly through the sheet metal part and the connection in sequence and then locking with a nut, since the bolt assembly not only plays the role of locking the extended length of the connection but also bears the gravity of the bed frame; therefore, after directly adjusting the extended length of the connection on the bed surround, when tightening the bolt assembly, someone needs to lift the electric bed frame additionally to eliminate the influence of the self-gravity of the electric bed frame, otherwise it is difficult to tighten the bolt assembly to lock the connection. 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 lift-back push bed frame that can not only better adapt to the existing bed frame enclosures of different width dimensions, avoid the defect of improper installation, has good safety, but also has a simple and labor-saving installation operation.

[0007] The technical solution of this application is to provide an electric lift-back push 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 a sheet metal part arranged along the width direction and / or the length direction of the electric lift-back push bed frame;

[0009] At least one connection, the connection includes a connecting part and an installation part connected to the free end of the connecting part and used for installing to the bed frame enclosure, the connecting part is slidably connected to the sheet metal part along the length direction of the sheet metal part for adjusting the distance of the installation part relative to the sheet metal part; and

[0010] The connecting part is provided with two support points in sequence along the length direction, and the two support points are respectively located on the upper and lower sides of the connecting part and are respectively abutted against the sheet metal part; or the sheet metal part is provided with two support points in sequence along the length direction, and the two support points are respectively located on the upper and lower sides of the sheet metal part and are respectively abutted against the connecting part; under the action of the gravity of the electric lifting back push bed frame, a frictional force is generated in a shearing manner between the connecting part and the sheet metal part through the two support points, so as to maintain position locking.

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

[0012] In some embodiments, the locking mechanism includes a lock rod assembly connected to the connecting part, and a guide hole extending along the length direction is provided on the sheet metal part, and the lock rod assembly is arranged in the guide hole; or

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

[0014] In some embodiments, the connecting part is slidably sleeved on the free end of the sheet metal part, a first support plate that is slidably attached to the top of the sheet metal part is connected to one end of the connecting part away from the installation part, and a second support plate that is slidably attached to the bottom of the sheet metal part is connected to one end of the connecting part close to the installation part, and the first support plate and the second support plate form the two support points.

[0015] In some embodiments, the first support plate, the second support plate and the connecting part are of an integrally bent and formed structure of metal plate parts.

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

[0017] In some embodiments, the connecting portion is slidably sleeved in the inner hole of the sheet metal part. A first convex block which protrudes upward and slidably fits with the bottom of the connecting portion is connected to the inner bottom wall of the inner hole of the sheet metal part. A second convex block which protrudes downward and slidably fits with the top of the connecting portion is connected to the inner top wall of the inner hole of the sheet metal part. The first convex block is arranged on a side away from the mounting portion compared with the second convex block. The first convex block and the second convex block 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, there are multiple connecting pieces which are respectively arranged on opposite sides in the width direction and / or the length direction of the electric lifting back-pushing bed frame.

[0020] In some embodiments, a support frame which extends downward and inclines towards the free end of the fixed bracket is connected to the connecting end of the fixed bracket. Mounting points are formed on the support frame. The linear actuator includes an actuator body and a drive end which axially reciprocates 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 the related art, an electric lifting back-pushing bed frame of the present application has the following advantages: Since the connecting portion of the connecting piece can slide along the length direction of the sheet metal part, the distance between the mounting portion and the sheet metal part can be adjusted, that is, the width of the fixed bracket can be adjusted by adjusting the protruding length of the connecting piece, so that it can be adapted to the perimeter frames of existing bed frames with different width sizes, and has strong versatility; when installing the electric lifting back-pushing bed frame on the perimeter frame of an existing bed frame, there is no need to accurately compare the width sizes of the two. Just directly place the electric lifting back-pushing bed frame horizontally on the perimeter frame, and then pull out the mounting portion of the connecting piece outward until it abuts against the perimeter frame and is fixed to the perimeter frame, so that the width of the fixed bracket can better adapt to the width between the perimeter frames of the existing bed frame, and the defect of loose fitting due to improper installation can be effectively avoided. There is no need to repeatedly adjust the protruding length of the connecting piece, so the installation is simple and labor-saving; more importantly, the setting of the two support points on the connecting portion or the sheet metal part enables the connecting portion and the sheet metal part to be locked in position in a shearing manner through the two support points under the action of the self-weight of the electric lifting back-pushing bed frame; that is, under the action of the self-weight of the electric lifting back-pushing bed frame, frictional force is generated at the two support points between the connecting portion and the sheet metal part and shearing force is generated in a direction other than the sliding direction of the connecting piece. This not only makes the connection of the connecting piece more firm, stable and safe, but also can effectively reduce the contact area between the connecting portion and the sheet metal part, so that the connecting piece can be easily pulled out outward without lifting the electric bed frame, making the whole installation process simple and labor-saving. Brief Description of the Drawings

[0022] Figure 1 is a schematic structural view of an electric lifting back-pushing bed frame according to some embodiments of the present application.

[0023] Figure 2 is another schematic structural view of an electric lifting back-pushing bed frame according to some embodiments of the present application.

[0024] Figure 3 is a side view schematic of an electric lifting back-pushing bed frame according to some embodiments of the present application.

[0025] Figure 4 is a schematic structural view of a connecting member according to some embodiments of the present application.

[0026] Figure 5 is another schematic structural view of a connecting member according to some embodiments of the present application.

[0027] Figure 6 is a schematic assembled structural view of a connecting member according to some embodiments of the present application.

[0028] Figure 7 is another schematic assembled structural view of a connecting member according to some embodiments of the present application.

[0029] Figure 8 is a schematic cross-sectional view of an assembled structure of a connecting member according to some embodiments of the present application.

[0030] Figure 9 is a schematic structural view of a connecting member according to some other embodiments of the present application.

[0031] Figure 10 is a schematic assembled structural view of a connecting member according to some other embodiments of the present application.

[0032] Figure 11 is a schematic cross-sectional view of an assembled structure of a connecting member according to some other embodiments of the present application.

[0033] Figure 12 is an installation schematic of a connecting member according to some other embodiments of the present application.

[0034] Figure 13 is an installation schematic of a kind of connecting member according to some embodiments of the present application.

[0035] Figure 14 is another installation schematic of a connecting member according to some embodiments of the present application.

[0036] Description of Reference Numerals:

[0037] 1. Fixed bracket, 100. Sheet metal part, 101. Support frame, 102. Guide hole, 103. First bump, 104. Second bump, 2. Movable bracket, 3. Linear actuator, 300. Actuator body, 301. Driving end, 302. Driving motor, 4. Connecting piece, 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. Lock rod assembly. Detailed implementation manners

[0038] First of all, those skilled in the art should understand that these implementation manners are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can adjust them as needed to adapt to specific application scenarios.

[0039] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0040] In the embodiments of the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

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

[0042] See Figures 1 to 8As shown; the embodiment of the present application discloses an electric lifting back-pushing bed frame, which is used to be installed on the frame of an existing bed frame, and its structure includes a fixed bracket 1, a movable bracket 2 and a linear actuator 3. The fixed bracket 1 is also called a fixed bed frame, or a base frame, etc., which is a square structure welded by metal pipe fittings. The fixed bracket 1 is used to be connected 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 a connecting end; the movable bracket 2 is also called a movable bed frame, or a back-pushing frame, which is also a square structure welded by metal pipe fittings. 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 driving end 301 that axially reciprocates relative to the actuator body 300, and the actuator body 300 includes a driving motor 302 and a lead screw nut assembly that is transmission-connected to the driving motor 302; the driving end 301 is rotationally connected to the movable bracket 2, and the actuator body 300 is rotationally connected to the fixed bracket 1; or the actuator body 300 is rotationally connected to the movable bracket 2, and the driving end 301 is rotationally connected to the fixed bracket 1.

[0044] In order to obtain sufficient thrust when the movable bracket 2 rotates upward from the initial horizontal state, or the linear actuator 3 provides a small thrust to rotate the movable bracket 2 upward from the initial horizontal state; in this embodiment, a support frame 101 extending downward and tilted toward the free end of the fixed bracket 1 is connected to the connecting end of the fixed bracket 1, and a mounting point is formed on the support frame 101, and the linear actuator 3 can be rotatably connected to the mounting point. The setting of the support frame 101 enables a large tilt angle between the axis of the linear actuator 3 and the plane where the movable bracket 2 is located when the movable bracket 2 is in the initial horizontal state, so that the axial thrust of the linear actuator 3 can be more converted into the thrust for the movable bracket 2 to rotate upward.

[0045] The linear actuator 3 in the above embodiment is a product of relatively mature technology in the prior art, 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 adopt an electric linear drive mechanism such as a linear motor and an electric push rod.

[0046] In order to make the width of the fixing bracket 1 better match the width of the existing bed frame, and also facilitate the assembly of the electric lifting back push bed frame with the existing bed frame. Figure 1 , Figure 2 ,Figure 7 and Figure 8 As shown in Figure 8 , the electric lifting back-pushing bed frame further includes at least one connecting member 4, and the fixed bracket 1 has a sheet metal part 100 extending along the width direction and / or the length direction of the electric lifting back-pushing bed frame; the connecting member 4 includes a connecting portion 400 and an installation portion 401 connected to the free end of the connecting portion 400 and used for installing to the bed frame enclosure. Among them, the connecting portion 400 is slidably connected to the sheet metal part 100 along the length direction of the sheet metal part 100 for adjusting the distance of the installation portion 401 relative to the sheet metal part 100.

[0047] It is not difficult to understand that the connecting member 4 can slide relative to the sheet metal part 100 along the width direction of the electric lifting back-pushing bed frame to adjust the protruding length of the installation portion 401 of the connecting member 4 to adapt to the width of the enclosure of the existing bed frame; therefore, the connecting member 4 can be arranged on one side or opposite sides or any three sides or four sides of the fixed bracket 1, and the number of the connecting members 4 is set according to actual needs.

[0048] Exemplarily, referring to Figure 1 and Figure 2 As shown in Figure 2 , in this embodiment, two long strip-shaped sheet metal parts 100 that are parallel to each other and extend along the width direction and / or the length direction of the electric lifting back-pushing bed frame are connected to the fixed bracket 1. The sheet metal part 100 is a metal square tube, and the connecting members 4 are multiple. Connecting members 4 are respectively connected to both ends of each sheet metal part 100. Therefore, connecting members 4 are respectively connected to the four free ends of the two sheet metal parts 100. When adapting to the enclosure of the existing bed frame, it is necessary to pull out the four connecting members 4 respectively so that the installation portion 401 of the connecting member 4 abuts and limits with the enclosure, that is, the installation portion 401 is placed on the support installation position inside the enclosure and the end of the installation portion 401 abuts against the inner wall of the enclosure; further, an installation hole 405 is provided on the installation portion 401 of the connecting member 4, and the user can install and fix the installation portion 401 on the wooden bed frame enclosure by passing a connecting screw through the installation hole 405.

[0049] Further in this embodiment, since the connecting portion 400 of the connecting member 4 of the electric lifting back-pushing bed frame can slide along the length direction of the sheet metal part 100, the distance of the installation portion 401 relative to the sheet metal part 100 can be adjusted, that is, the width of the fixed bracket 1 can be adjusted by adjusting the protruding length of the connecting member 4, so that it can be adapted to the enclosures of existing bed frames with different width dimensions, and the universality is strong.

[0050] When the user installs the electric lift backrest bed frame on the surrounding frame of the existing bed frame, there is no need to accurately compare the width dimensions of the two. Just place the electric lift backrest bed frame directly horizontally on the surrounding frame, and then pull out the installation part 401 of the connecting piece 4 outward until it abuts against the surrounding frame and is fixed to the surrounding frame, so that the width of the fixed bracket 1 can better adapt to the width between the surrounding frames of the existing bed frame, effectively avoiding the defect of loose clearance caused by improper installation. There is no need to repeatedly debug the length of the protruding connecting piece 4, so the installation is simple and labor-saving.

[0051] It can be understood that when the electric lift backrest bed frame is installed on the surrounding frame of the existing bed frame, during use, especially during the height adjustment of the movable bracket 2 of the electric lift backrest bed frame, the movable bracket 2 rotates upward and rises, and the user leans on the movable bracket 2. As a result, the fixed bracket 1 and the connection between the fixed bracket 1 and the surrounding frame need to bear a large torque. If the connection between the connecting piece 4 and the sheet metal part 100 is not firm or the connection stability is not high, such as in the background art, using the method of screwing tightly, it is very easy for the connecting piece 4 to shift, loosen, etc., resulting in the shaking or tipping over of the fixed bracket 1 and posing a safety hazard. In this embodiment, to overcome the above defects, refer to Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, two support points are sequentially arranged along the length direction of the connecting part 400 of the connecting piece 4. The two support points are respectively located on the upper and lower sides of the connecting part 400 and respectively abut against the sheet metal part 100; under the action of the gravity of the electric lift backrest bed frame, the connecting part 400 and the sheet metal part 100 are locked in position in a shearing manner through the two support points.

[0052] It is not difficult to understand that in the above embodiment, when the connecting piece 4 extends relative to the sheet metal part 100 and is fixed to the surrounding frame of the existing bed frame; under the action of the self-gravity of the electric lift backrest bed frame, the sheet metal part 100 exerts a downward pressure on the connecting piece 4, the bottom of the sheet metal part 100 exerts a pressure on the support point of the connecting piece 4 located below, and at the same time the support point of the connecting piece 4 located above exerts a pressure on the top of the sheet metal part 100. Coupled with the misalignment of the two support points 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 connecting piece 4, realizing the self-locking of the movement of the connecting part 400.

[0053] Further, in this embodiment, under the action of the self - gravity of the electric lifting back - pushing bed frame, the connecting part 400 and the sheet metal part 100 are position - locked in a shearing manner through two support points; that is, under the action of the self - gravity of the electric lifting back - pushing bed frame, frictional forces are generated at the two support points between the connecting part 400 and the sheet metal part 100, and shearing forces are generated in the direction non - parallel to the sliding direction of the non - connecting part 4. This not only makes the locking of the connecting part 4 more firm and stable, with good safety, but also can effectively reduce the contact area between the connecting part 400 and the sheet metal part 100, so that the connecting part 4 can be easily pulled outwards without lifting the electric bed frame, making the entire installation process simple and labor - saving.

[0054] It can be understood that the support points in the above - mentioned embodiment play the role of fulcrums, and they can be dot - shaped, block - shaped, plate - shaped or rod - shaped support structures. Among them, the dot - shaped support structure can also be understood as a convex point, which is used to generate a shearing force on the sheet metal part 100 under the action of the self - gravity of the electric lifting back - pushing bed frame to keep the connecting part 4 position - locked.

[0055] Specifically, in this embodiment, as shown in Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 , the connecting part 400 of the connecting part 4 is slidably sleeved on the free end of the sheet metal part 100. One end of the connecting part 400 far from the installation part 401 is connected with a first support plate 402 that extends upwards and bends towards the sheet metal part 100 at the upper part and slidably fits with the top of the sheet metal part 100. And one end of the connecting part 400 close to the installation part 401 is connected with a second support plate 403 that slidably fits with 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 part 400 are integrally formed by bending a metal plate. 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, and the structure of this connecting part 4 has good stability.

[0056] In the above - mentioned embodiment, under the action of the self - gravity of the electric lifting back - pushing bed frame, while the sheet metal part 100 exerts a downward pressure on the second support plate 403, the first support plate 402 exerts a pressure on 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 exerts an upward reaction force on the sheet metal part 100, and under the pressure of the sheet metal part 100, the first support plate 402 exerts a downward reaction force on the sheet metal part 100. Therefore, the directions of the reaction forces exerted by the second support plate 403 and the first support plate 402 on the sheet metal part 100 are opposite, and the two form a shearing clamping force, so that the connecting part 4 can be well held on the sheet metal part 100.

[0057] Further, in this embodiment, in order to more firmly hold the connecting member 4 on the sheet metal part 100 and prevent the connecting member 4 from moving accidentally, a locking mechanism is connected between the connecting portion 400 of the connecting member 4 of the electric lift back push bed frame and the sheet metal part 100. The locking mechanism is used to lock the connecting portion 400 at any position in its stroke, and the locking mechanism is arranged in the horizontal direction. That is, when the mounting portion 401 of the connecting member 4 extends outwards and is connected to the surrounding frame of the existing bed frame, the locking mechanism can be locked to lock the connecting member 4 on the sheet metal part 100, improving the safety of use.

[0058] The locking mechanism can be realized by using fasteners for locking, or by using snap - fasteners or other limiting structures such as clamping - fit grooves, cam pressing mechanisms, etc. to lock the connecting member 4 on the sheet metal part 100. Specifically, in this embodiment, see Figure 6 As shown, the locking mechanism includes a lock rod assembly 5 connected to the connecting portion 400, and a guiding hole 102 extending along the length direction is provided on the sheet metal part 100. The lock rod assembly 5 is inserted into the guiding hole 102. Specifically, the lock rod assembly 5 includes a threaded lock rod and a nut threadedly connected to the threaded portion of the lock rod. The connecting portion 400 is provided with a connecting hole 404 in the transverse direction. The lock rod sequentially passes through the connecting hole 404 and the guiding hole 102 and is threadedly connected to the nut. Tightening or loosening the nut can achieve locking or unlocking of the connecting member 4.

[0059] In the above - mentioned embodiment, in addition to the function of locking the connecting member 4 and the sheet metal part 100, the lock rod assembly 5 is inserted into the guiding hole 102. The lock rod assembly 5 and the guiding hole 102 are arranged in the horizontal direction rather than the vertical direction. That is, the locking force applied by the lock rod assembly 5 and the frictional force generated by the two support points in a shearing manner are not in the same plane. When the connecting member 4 slides relative to the sheet metal part 100, the sliding fit between the lock rod assembly 5 and the guiding hole 102 plays a guiding role, making the sliding of the connecting member 4 smoother.

[0060] It is not difficult to understand that when the electric lift back push bed frame is directly horizontally placed on the surrounding frame for installation, since the first support plate 402 and the second support plate 403 on the connecting member 4 form two support points to apply a shearing locking force to the sheet metal part 100, the gravity of the electric lift back push bed frame is only applied to the connecting member 4 through the sheet metal part, and the lock rod assembly 5 does not bear pressure or bears negligible pressure. Therefore, the lock rod assembly 5 only plays the role of locking the extended length of the connecting member 4. When tightening the lock rod assembly 5, there is no need for someone to lift the electric bed frame additionally to eliminate the influence of the self - gravity of the electric lift back push bed frame on the lock rod assembly 5, and there is no need to worry about the movement of the sheet metal part 100 during the process of tightening the lock rod assembly 5. Therefore, the operation is simple and labor - saving, and the problem of structural failure caused by the improper installation of the lock rod assembly 5 can be avoided, making the lock rod assembly 5 tightened more firmly and stably, improving the safety of the structure.

[0061] In other embodiments, the lock rod assembly 5 of the locking mechanism can also be connected to the sheet metal part 100, and a guiding hole extending along the length direction is provided on the connecting part 400, and the lock rod assembly 5 is arranged in the guiding hole. Refer to Figure 13 and Figure 14 shown; that is, compared with the above embodiment, the positions of the lock rod assembly 5 and the guiding hole 102 are interchanged between the sheet metal part 100 and the connecting part 4.

[0062] In some embodiments, refer to Figure 9 、 Figure 10 and Figure 11 shown, the sheet metal part 100 is a square metal pipe fitting, the connecting part 400 of the connecting part 4 is slidably sleeved in the inner hole of the sheet metal part 100, a first support block 406 which protrudes downward and is slidably attached to the inner wall of the sheet metal part 100 is connected to the bottom of the end of the connecting part 400 far from the installation part 401, and a second support block 407 which protrudes upward and is slidably attached to the inner wall of the sheet metal part 100 is connected to the top of the end of the connecting part 400 close to the installation part 401. The first support block 406 and the second support block 407 form two support points. Under the action of the self-gravity of the electric lifting back push bed frame, the sheet metal part 100 applies a downward pressure to the second support block 407. On the contrary, the second support block 407 applies an upward reaction force to the sheet metal part 100, and under the pressure of the sheet metal part 100, the first support block 406 applies a downward reaction force to the sheet metal part 100. Therefore, the directions of the reaction forces applied by the second support block 407 and the first support block 406 to the sheet metal part 100 are opposite, and the two form a shearing clamping force, so that the connecting part 4 can be well held in the sheet metal part 100. Similarly, the first support block 406 and the second support block 407 respectively abut against the inner wall of the inner hole of the sheet metal part 100, reducing the contact area between the connecting part 4 and the sheet metal part 100, so that the pulling operation of the connecting part 4 is more labor-saving, and the installation of the electric lifting back push bed frame and the existing bed frame enclosure is more convenient.

[0063] In some embodiments, the two support points can also be arranged on the sheet metal part 100. For example, two support points are sequentially arranged on the sheet metal part 100 along the length direction, and the two support points are respectively located on the upper and lower sides of the sheet metal part 100 and respectively abut against the connecting part 400. Specifically refer to Figure 12As shown, the sheet metal part 100 is a square metal pipe fitting. The connecting part 400 of the connecting piece 4 is slidably sleeved inside the inner hole of the sheet metal part 100. A first convex block 103 that protrudes upward and slidably fits with the bottom of the connecting part 400 is connected to the inner bottom wall of the inner hole of the sheet metal part 100. A second convex block 104 that protrudes downward and slidably fits with the top of the connecting part 400 is connected to the inner top wall of the inner hole of the sheet metal part 100. Moreover, the first convex block 103 is arranged on the side away from the mounting part 401 compared with the second convex block 104. The first convex block 103 and the second convex block 104 form two support points. Similarly, the second convex block 104 exerts a downward pressure on the top of the connecting part 400, while the first convex block 103 exerts an upward pressure on the bottom of the connecting part 400. The two form a shearing clamping force, so as to well hold the connecting piece 4 inside the sheet metal part 100.

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

[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 piece 4 can also be a channel-shaped part or a metal square pipe structure that is nested with and slidable relative to it; such as Figure 13 As shown, the cross-sections of both the sheet metal part 100 and the connecting piece 4 are set as square channel-shaped parts; and again Figure 14 As shown, the cross-section of the sheet metal part 100 is set as a square channel-shaped part, while the connecting piece 4 is set as a metal square pipe shape and is slidably sleeved inside the sheet metal part 100.

[0066] In the description of the embodiments of the present application, it should be noted that in the description of the present application, terms such as "inner", "outer", etc. indicating directions or positional relationships are based on the directions or positional relationships 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

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

[0068] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An electric lifting back push 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 a sheet metal part arranged along the width direction and / or length direction of the electric lifting back push bed frame; At least one connecting member, the connecting member comprising a connecting portion and a mounting portion connected to a free end of the connecting portion and used for mounting to a bed frame, the connecting portion being slidably connected to the sheet metal member along a length direction of the sheet metal member for adjusting a distance of the mounting portion relative to the sheet metal member; and The connecting part is provided with two supporting points in sequence along the length direction, and the two supporting points are respectively located at the upper and lower sides of the connecting part and respectively resist the sheet metal part; or the sheet metal part is provided with two supporting points in sequence along the length direction, and the two supporting points are respectively located at the upper and lower sides of the sheet metal part and respectively resist the connecting part; under the action of the gravity of the electric lifting back push bed frame, friction force is generated between the connecting part and the sheet metal part through the two supporting points in a shearing manner to maintain the position locking.

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

3. The electric lifting back push bed frame according to claim 2, characterized in that: The locking mechanism comprises a locking rod assembly connected to the connecting portion, and the sheet metal part is provided with a guide hole extending in the length direction, and the locking rod assembly is inserted into the guide hole; or The locking mechanism comprises 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, and the locking rod assembly is inserted into the guide hole.

4. The electric lifting back push bed frame according to claim 1, characterized in that: The connecting part is slidably mounted on the free end of the sheet metal, and the end of the connecting part away from the mounting part is connected to a first support plate that slides in contact with the top of the sheet metal, and the end of the connecting part close to the mounting part is connected to a second support plate that slides in contact with the bottom of the sheet metal, and the first support plate and the second support plate form two support points.

5. The electric lifting back push bed frame according to claim 4, characterized in that: The first support plate, the second support plate and the connecting portion are integrally bent metal plate structures.

6. The electric lifting back push bed frame according to claim 1, characterized in that: The connecting part is slidably mounted in the inner hole of the sheet metal part, and the bottom of the connecting part away from the mounting part is connected with a first supporting block which is convex downward and slidingly fitted with the inner wall of the sheet metal part, and the top of the connecting part close to the mounting part is connected with a second supporting block which is convex upward and slidingly fitted with the inner wall of the sheet metal part, and the first supporting block and the second supporting block form the two supporting points.

7. The electric lifting back push bed frame according to claim 1, characterized in that: The connecting part is slidably mounted in the inner hole of the sheet metal part, and a first protrusion is connected to the inner bottom wall of the inner hole of the sheet metal part, which is convex upward and slidably fitted with 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, which is convex downward and slidably fitted with the top of the connecting part. The first protrusion is arranged on a side away from the mounting part compared to the second protrusion, and the first protrusion and the second protrusion form two supporting points.

8. The electric lifting back push 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 groove-shaped part.

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

10. The electric lifting back push bed frame according to any one of claims 1 to 9, characterized in that: The connecting end of the fixed bracket is connected to a support frame extending downward and inclined toward the free end of the fixed bracket, and a mounting point is formed on the support frame; the linear actuator includes an actuator body and a driving end that reciprocates axially relative to the actuator body, the driving end or the actuator body is rotatably connected to the movable bracket, and the actuator body or the driving end is rotatably connected to the mounting point.

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