Adjustable bed frame and electric bed

Abstract

The utility model discloses an adjustable bed frame and an electric bed, belongs to the field of electric bed frames, solves the problem that a driving device needs to output larger thrust, and adopts the technical scheme that the adjustable bed frame mainly comprises a fixed bed frame, an adjustable bed frame, a primary lifting mechanism and a secondary lifting mechanism, the linear actuator drives the sliding part to do reciprocating linear motion, the sliding part is provided with a first pushing part and a second pushing part, the adjustable bed frame is pivoted to the fixed bed frame, the first-stage lifting mechanism comprises a first support with a slope surface, and the second-stage lifting mechanism comprises a second driving support and a second driven support with a slope surface. The first stroke of the sliding component enables the adjustable bed frame to be lifted to a first inclination angle, the second stroke of the sliding component enables the adjustable bed frame to be lifted to a second inclination angle, and the first stroke and the second stroke are successive and continuous in the same direction. The driving device is mainly used for reducing the thrust required to be output by the driving device.

Description

TECHNICAL FIELD

[0001] The utility model discloses adjustable bedstead and electric bed belong to electric bedstead technical field. BACKGROUND

[0002] With the improvement of living standards, people also put forward higher requirements for furniture, and the bed frame of the electric bed can adjust the shape or height through the electric control mode, which is commonly used in families or medical care. The electric bed has many functions, among which the bed frame part usually includes functions such as adjustable bed board head inclination, adjustable bed board leg height, adjustable bed board overall height, adjustable bed board overall inclination, etc.

[0003] For example, the patent CN212280661U discloses a zero-wall electric bed, which comprises a bed board structure, a bed frame structure and a back telescopic motor. The bed board structure comprises a back plate and a back plate seat plate, and the back plate rotates relative to the back plate seat plate. The bed frame structure comprises a fixed frame and a movable frame. One end of the back telescopic motor is rotatably connected with the back plate, and the other end is rotatably connected with the movable frame. When the back telescopic motor moves, it drives the back plate to rotate relative to the back plate seat plate to rise or fall, thereby adjusting the inclination angle of the back plate. In order to lift the back plate from the lying state, an angle needs to be formed between the back telescopic motor and the back plate in the patent, which causes the end of the back telescopic motor to protrude downward, thereby increasing the thickness of the entire bed board, increasing the space occupied by the bed board, and increasing the packaging volume, which is not conducive to the transportation of the bed board. In addition, during the lifting process of the back plate, the entire weight of the back plate is borne by the back telescopic motor, which requires the back telescopic motor to output a larger thrust, which easily affects the service life of the back telescopic motor.

[0004] For example, the patent CN220937425U discloses a modular longitudinal support of an electric bed frame, an electric bed frame and an electric bed. It comprises a back support, an intermediate support, a driver and a transmission assembly. The back support comprises a transmission lever, which has a driving end, a driven end and a hinge hole between the driving end and the driven end. The transmission assembly comprises a transmission screw and a first pushing part provided on the transmission screw. When the back support rotates, the driver drives the first pushing part to move the driving end, so that the entire transmission lever rotates around the hinge hole. At this time, the driven end drives the back support to rotate synchronously, thereby lifting the back support. Similarly, in order to lift the back support from the lying state, the driving end of the entire transmission lever will form an angle with the back support, thereby increasing the thickness of the entire transmission lever, increasing the overall thickness of the bed frame, and increasing the packaging volume, which is not conducive to the transportation of the bed board. In addition, during the lifting process of the back support, the entire weight of the back support is also applied to the driver through the transmission lever, and the driver also needs to output a larger thrust to drive the back support to rotate. UTILITY MODEL CONTENTS

[0005] The utility model discloses a bed frame and electric bed, which can reduce the thrust required to be output by the driving device.

[0006] To solve the above technical problems, the utility model adopts the following technical scheme:

[0007] The adjustable bed frame comprises:

[0008] The fixed bed frame is provided with a linear actuator and a sliding component, the sliding component is slidably supported on the fixed bed frame, the linear actuator drives the sliding component to make reciprocating linear motion along the longitudinal direction of the fixed bed frame, and the sliding component is provided with a first pushing part and a second pushing part.

[0009] The adjustable bed frame is pivotally connected to the fixed bed frame and can be turned relative to the fixed bed frame to change the inclination angle.

[0010] The lifting mechanism comprises a primary lifting mechanism and a secondary lifting mechanism, the primary lifting mechanism comprises a first support fixed to the adjustable bed frame, and the first support is provided with a slope surface; the secondary lifting mechanism comprises a second driving support and a second driven support, one end of the second driven support is pivotally connected to the fixed bed frame, and the other end of the second driven support is pivotally connected to the second driving support.

[0011] The first stroke of the sliding component drives the first pushing part to push the first support along the slope surface to lift the adjustable bed frame to a first inclination angle, the second stroke of the sliding component drives the second pushing part to push the second driving support to lift the adjustable bed frame to a second inclination angle, and the first stroke and the second stroke are successive and continuous in the same direction.

[0012] The utility model has the beneficial effects that:

[0013] The utility model discloses a lifting mechanism includes primary lifting mechanism and secondary lifting mechanism, and the sliding part has first push part and second push part, in the first stroke of sliding part, first push part pushes first support along the slope, and first push part gradually lifts adjustable bedstead through the slope, makes adjustable bedstead from lying state gradually be lifted, and the inclination angle of adjustable bedstead is increased, and in the lifting process, the sliding part forms the support to adjustable bedstead through first push part, and the force that sliding part receives is greater than the horizontal component of force in the vertical direction at this moment, and the fixed bed frame can form the support to the sliding part and scatter the vertical component of force that sliding part receives, therefore, linear actuator drive sliding part sliding only needs to overcome the horizontal component of force that sliding part receives and the friction between sliding part and fixed bed frame, need not overcome the weight of whole adjustable bedstead, therefore can greatly reduce the thrust that linear actuator needs to output, help to prolong the service life of linear actuator, can also make linear actuator push greater load, improve the maximum load of electric bed frame.

[0014] In addition, the secondary lifting mechanism includes a second driving support and a second driven support which are pivotally connected to each other, in the second stroke of the sliding part, the second push part pushes the second driving support to rotate, the second driving support drives the second driven support to rotate around the fixed bed frame in the rotating process, the second driven support supports the adjustable bed frame and lifts the adjustable bed frame to a second inclination angle, with the sliding of the sliding part, the inclination angle of the second driving support gradually increases under the action of the second push part, therefore, the horizontal component of force of the second driving support acting on the second push part will gradually decrease, and the linear actuator driving the sliding part to slide still only needs to overcome the horizontal component of force that the sliding part receives and the friction between the sliding part and the fixed bed frame, without overcoming the weight of the whole adjustable bed frame, therefore, the linear actuator still only needs to output a smaller thrust to push a larger load, improves the maximum load of the electric bed frame, and also prolongs the service life of the linear actuator.

[0015] Secondly, in the process of switching the sliding part from the first stroke to the second stroke, the support of the sliding part to the adjustable bed frame is switched from the first push part to the second push part, and the first stroke and the second stroke of the sliding part are successive and continuous in the same direction, which makes the switching of the support point of the sliding part to the adjustable bed frame more gentle, helps to keep the adjustable bed frame lifting stably, avoids the possibility of the adjustable bed frame suddenly dropping, and helps to improve the user's experience.

[0016] Preferably, the sliding part pushes the secondary lifting mechanism to pre-lift in the first stroke, and the pre-lift of the secondary lifting mechanism causes the second driving support to tilt relative to the fixed bed support or increases the tilt angle of the second driving support. With the above technical scheme, in the first stroke, the sliding part pushes the secondary lifting mechanism to pre-lift, and one end of the second driven support is pivoted to the fixed bed support, so that the end of the second driven support pivoted to the second driving support is lifted by the sliding part, that is, the second driving support is in a tilted state as a whole. In the second stroke of the sliding part, the second pushing part exerts a pushing force on the second driving support. Since an included angle has been formed between the second driving support and the fixed bed support in the first stroke, the second driving support is more easily lifted under the pushing of the second pushing part, the pushing force required for the second pushing part to push the second driving support can be reduced, and in turn, the pushing force required to be output by the linear actuator can be reduced, which helps to prolong the service life of the linear actuator.

[0017] Preferably, the second driving support or the second driven support is provided with a protrusion extending towards the fixed bed support, and the side of the protrusion facing the sliding part is provided with a guide surface. The sliding part has a stepped portion. In the first stroke, the stepped portion pushes the protrusion to lift along the guide surface to pre-lift the secondary lifting mechanism. With the above technical scheme, in the first stroke of the sliding part, the stepped portion lifts the protrusion along the guide surface, and in turn, lifts the pivoted portion of the second driving support and the second driven support, so that an included angle is formed between the second driving support and the fixed bed support. In the second stroke of the sliding part, the second pushing part exerts a pushing force on the second driving support. When the sliding part continues to slide, a horizontal pushing force is exerted on the lowest end of the second driving support, so that the second driving support can continue to increase the tilt angle, and at the same time, the second driving support can continue to lift the second driven support, so that the second driving support can provide strong support to the second driven support, to facilitate lifting the adjustable bed support to the second tilt angle. In addition, the sliding part lifts the second driving support through the protrusion, which can reduce the external force required for the second driving support to increase the tilt angle, prevent the second driving support from being stuck with the second pushing part, and ensure the stability of the operation of the sliding part.

[0018] As preferred, the first pushing part detachably supports the first support at the first inclination angle, and the second pushing part detachably supports the second active support at the second inclination angle, so that the adjustable bed frame is lowered by gravity instead of being forced to drive by the lowering torque of the linear actuator. With the foregoing technical scheme, when the sliding part reversely slides under the drive of the linear actuator during the lowering of the adjustable bed frame from the second inclination angle, the second pushing part is separated from the second active support, so that the power transmission between the linear actuator and the second active support is blocked, and the adjustable bed frame is lowered only by gravity. During the lowering, the friction between the sliding part and the fixed bed frame also forms resistance to the lowering of the adjustable bed frame, further slowing down the lowering speed of the adjustable bed frame. If the fingers of a user are clamped between the adjustable bed frame and the fixed bed frame, the force acting on the fingers is smaller than the force generated by the weight of the adjustable bed frame, reducing the injury to the fingers or other limbs, and helping to improve the use safety of the electric bed frame. Similarly, when the linear actuator drives the sliding part to slide during the lowering of the adjustable bed frame from the first inclination angle, the first pushing part is also separated from the first support, so that the power transmission between the linear actuator and the first support is blocked.

[0019] As preferred, the first pushing part is a first roller rotationally connected with the sliding part. With the foregoing technical scheme, the first roller is used to form rolling friction between the first pushing part and the first support, so that the friction between the first pushing part and the first support is reduced, and the thrust required to be output by the linear actuator when the adjustable bed frame is lifted is reduced.

[0020] As preferred, a strip-shaped guide hole is formed in the sliding part along the linear motion direction of the sliding part, one end of the guide hole constitutes the second pushing part, the second active support is provided with a guide shaft at the end away from the pivot joint part, the guide shaft is inserted into the guide hole and slides relative to the guide hole during the first stroke of the sliding part, and the second stroke starts at the moment when the guide shaft abuts against the second pushing part.

[0021] As preferred, the lifting mechanism further comprises a third lifting mechanism, the third lifting mechanism comprising a third driving support and a third driven support, the third driven support being pivotally connected with the fixed bed support and the third driving support respectively, the sliding component having a third pushing part, the third stroke of the sliding component causing the third pushing part to push the third driving support to lift the adjustable bed support to a third inclined angle, the third stroke and the second stroke being successive and continuous in the same direction. With the foregoing technical scheme, in the third stroke of the sliding component, the third pushing part pushes the third driving support to rotate, the third driving support drives the third driven support to rotate around the fixed bed support in the process of rotation, the third driven support supports the adjustable bed support and lifts the adjustable bed support to the third inclined angle, and as the sliding component slides, the third driving support gradually increases in the inclined angle under the action of the third pushing part, so that the horizontal component force of the third driving support acting on the third pushing part gradually decreases, and the linear actuator only needs to overcome the horizontal component force received by the sliding component and the friction between the sliding component and the fixed bed support to drive the sliding component to slide, without needing to overcome the weight of the entire adjustable bed support, so that the linear actuator still only needs to output a smaller thrust to push a larger load, thereby improving the maximum load of the electric bed support and prolonging the service life of the linear actuator.

[0022] As preferred, the adjustable bed support is lifted to an angle greater than the angle to which the adjustable bed support is lifted in the second stroke in the third stroke, and the adjustable bed support is lifted to an angle greater than the angle to which the adjustable bed support is lifted in the first stroke in the third stroke. With the foregoing technical scheme, the third stroke of the sliding component can greatly increase the adjustment range of the adjustable bed support, which can adapt to various different needs of users; in addition, as the inclined angle of the adjustable bed support continuously increases, the thrust required by the linear actuator to push the sliding component gradually decreases, and at the beginning of the third stroke, the inclined angle of the adjustable bed support is already large, so in the third stroke of the sliding component, the thrust required by the linear actuator to be output is small, that is, the linear actuator still only needs to output a smaller thrust to realize large-range angle adjustment of the adjustable bed support.

[0023] Preferably, the sliding component pushes the third lifting mechanism to pre-lift in the second stroke, and the third lifting mechanism pre-lift increases the inclination angle of the third active support relative to the fixed bed frame. With the above technical scheme, in the second stroke, the sliding component pushes the third lifting mechanism to pre-lift, and one end of the third driven support is pivoted to the fixed bed frame, so that the end of the third driven support pivoted to the third active support is lifted by the sliding component, that is, the third active support is in an inclined state as a whole. In the third stroke of the sliding component, the third pushing part exerts a pushing force on the third active support. Since an angle is formed between the third active support and the fixed bed frame in the second stroke, the third active support is more easily lifted under the pushing of the third pushing part, the pushing force required by the third pushing part to push the third active support can be reduced, and in turn, the pushing force required by the linear actuator to output can be reduced, which helps to prolong the service life of the linear actuator.

[0024] Preferably, in the second stroke, the third driven support is lifted synchronously with the second driven support, and the end of the third active support away from the third driven support extends to the sliding component and naturally droops.

[0025] Preferably, in the third inclination angle, the third pushing part detachably supports the third active support, so that the adjustable bed frame is lowered by gravity instead of being forcibly driven by the lowering torque of the linear actuator. With the above technical scheme, when the adjustable bed frame is lowered from the third inclination angle and the sliding component reversely slides under the driving of the linear actuator, the third pushing part is separated from the third active support, so that the power transmission between the linear actuator and the third active support is blocked, and the adjustable bed frame is lowered only by gravity. In the process of lowering, the friction between the sliding component and the fixed bed frame also forms resistance to the lowering of the adjustable bed frame, further slowing down the lowering speed of the adjustable bed frame. If the fingers of a user are clamped by the adjustable bed frame and the fixed bed frame, the force acting on the fingers is smaller than the force generated by the weight of the adjustable bed frame, reducing the injury to the fingers or other limbs, and helping to improve the use safety of the electric bed frame.

[0026] Preferably, the third pushing part is a horizontally arranged hinge shaft, the axial direction of the hinge shaft is perpendicular to the sliding direction of the sliding component, the end of the third active support close to the sliding component is provided with a clamping groove, the side of the clamping groove facing the sliding component forms a notch, and the hinge shaft is embedded in the clamping groove and is pivoted to the third active support in the third stroke. With the above technical scheme, the notch of the third active support can ensure that the hinge shaft is pivoted to the third active support, and when the sliding component reversely slides, the hinge shaft can be ensured to be separated from the clamping groove, so that the third active support is separated from the third pushing part, the third active support only works when the sliding component is in the third stroke, and the overall operation of the adjustable bed frame is more stable and reliable.

[0027] As preferred, the third driven support is a part of a second driven support, the second driven support further comprising a connecting rod, one end of the connecting rod being pivotally connected to an end of the third driven support, and the other end of the connecting rod being pivotally connected to the second driving support, and the third driving support being pivotally connected to a middle part of the third driven support.

[0028] As preferred, the third driven support is provided with a limiting plate towards a side of the adjustable bed frame, the connecting rod being located at a lower side of the limiting plate, and the sliding component pushes the connecting rod against the limiting plate through the second driving support in the second stroke, and the connecting rod rotates relative to the third driven support and the adjustable bed frame in the third stroke of the sliding component, and the included angle between the connecting rod and the second driving support gradually increases. With the foregoing technical scheme, the limiting plate can limit the rotation of the connecting rod towards the adjustable bed frame, and in the second stroke of the sliding component, the second pushing part pushes the connecting rod through the second driving support, and the connecting rod drives the third driven support to synchronously lift through the limiting plate, at this time, the connecting rod and the third driven support form a stable whole, so as to keep the support between the second driving support and the connecting rod stable and reliable, and the adjustable bed frame can stably lift, which helps to improve the user experience.

[0029] As preferred, the top end of the third driven support is rotatably connected with a second roller, and the third driven support forms rolling friction with the adjustable bed frame through the second roller in the third stroke. With the foregoing technical scheme, in the third stroke of the sliding component, the third pushing part supports the third driven support through the third driving support, at this time, the top end of the third driven support abuts against the adjustable bed frame, and in the process of continuously lifting the adjustable bed frame, the contact point between the third driven support and the adjustable bed frame is continuously changed, therefore, the third driven support abuts against the adjustable bed frame through the second roller, which can form rolling friction between the third driven support and the adjustable bed frame, and further can reduce the frictional force between the third driven support and the adjustable bed frame, and further can reduce the output pushing force required by the linear actuator, and at the same time, can reduce the possibility of abrasion between the third driven support and the adjustable bed frame, and helps to prolong the service life of the third driven support and the adjustable bed frame.

[0030] As preferred, the pushing and pulling direction of the linear actuator is parallel to the length direction of the fixed bed frame, and the linear actuator is arranged in the thickness range of the fixed bed frame. With the foregoing technical scheme, the linear actuator is arranged in the thickness range of the fixed bed frame, so that the connecting structure of the fixed bed frame and the linear actuator is more compact, and the installation of the linear actuator does not affect the thickness of the fixed bed frame, which helps to reduce the thickness of the overall adjustable bed frame when the adjustable bed frame is in a lying state, and thus the packaging size of the adjustable bed frame can be reduced, which is conducive to the transportation and storage of the adjustable bed frame. In addition, the sliding component slides along the length direction of the fixed bed frame under the driving of the linear actuator, and the sliding component acts on the primary lifting mechanism and the secondary lifting mechanism to rotate towards the upper side of the fixed bed frame. Therefore, during the rotation of the adjustable bed frame, the linear actuator and the sliding component do not protrude towards the bottom of the fixed bed frame, that is, the adjustable bed frame does not affect the space below the fixed bed frame during use, so that space below the fixed bed frame does not need to be reserved during installation, which makes the installation of the adjustable bed frame more simple and convenient, and can also reduce the installation space of the adjustable bed frame.

[0031] As preferred, the support of each lifting mechanism is a pair of support rods, and the two support rods are distributed in the width direction of the fixed bed frame. With the foregoing technical scheme, the use of a pair of supports can increase the support position of the lifting mechanism on the adjustable bed frame, so that the lifting mechanism supports the adjustable bed frame more stably, and reduces the possibility of swinging or shaking of the adjustable bed frame during lifting. In addition, the pressure on each support rod can be reduced, and the possibility of deformation or fracture of the support rod can be reduced.

[0032] As preferred, the fixed bed frame is provided with a sliding surface along the length direction thereof, and the sliding component slides along the sliding surface.

[0033] As preferred, the fixed bed frame is provided with a support frame along the length direction thereof, the support frame includes a bottom plate for supporting the sliding component and a side plate for limiting the sliding direction of the sliding component, and the upper surface of the bottom plate forms the sliding surface.

[0034] As preferred, a sliding pad for reducing friction is arranged on the bottom of the sliding component or the sliding surface, the sliding component is in sliding fit with the fixed bed frame through the sliding pad, the sliding pad extends to between the sliding component and the side plate, and the sliding pad on both sides is in contact with the side wall of the sliding component and the side plate respectively.

[0035] As preferred, rolling friction is formed between the sliding component and the sliding surface.

[0036] As preferred, the fixed bed frame is provided with two adjustable bed frames along the longitudinal direction, one end of the two adjustable bed frames close to each other is respectively pivotally connected to the fixed bed frame, and the two adjustable bed frames are opposite in tilting direction, the adjustable bed frame is provided with two lifting mechanisms, and the two lifting mechanisms independently drive the adjustable bed frame to lift respectively.

[0037] As preferred, the linear actuator comprises a motor, a screw rod and a nut sleeved on the screw rod, the motor is fixed to the fixed bed frame, the screw rod is distributed along the longitudinal direction of the fixed bed frame, the output end of the motor is in transmission fit with the screw rod and drives the screw rod to rotate, and the nut is fixedly connected with the sliding component.

[0038] The utility model discloses still displayed electric bed, including adjustable bed frame, adjustable bed frame includes fixed bed frame, with the adjustable bed frame of fixed bed frame pivot connection and drive adjustable bed frame relative fixed bed frame turnover's lifting mechanism, adjustable bed frame adopts the adjustable bed frame of any one described above.

[0039] The other features and advantages of the utility model will be disclosed in the following specific embodiment, drawing in detail. BRIEF DESCRIPTION OF DRAWINGS

[0040] The utility model makes further illustration in connection with the drawings as follows:

[0041] Figure 1 It is the structure schematic drawing of adjustable bed frame in flat lying state in example one of the utility model;

[0042] Figure 2 It is the partial sectional view of adjustable bed frame in flat lying state in example one of the utility model;

[0043] Figure 3 It is the structure schematic drawing of primary lifting mechanism and secondary lifting mechanism in example one of the utility model;

[0044] Figure 4 It is the partial sectional view of adjustable bed frame reaching first inclination angle in example one of the utility model;

[0045] Figure 5 It is the partial sectional view of adjustable bed frame reaching second inclination angle in example one of the utility model;

[0046] Figure 6 It is the structure schematic drawing of lifting mechanism when adjustable bed frame reaches second inclination angle in example one of the utility model;

[0047] Figure 7 It is the structure schematic drawing of adjustable bed frame with tertiary lifting mechanism in example two of the utility model;

[0048] Figure 8 It is the partial sectional view of adjustable bed frame in flat lying state in example two of the utility model Figure 1 ;

[0049] Figure 9 It is the partial sectional view of adjustable bed frame in flat lying state in example two of the utility model Figure 2 ;

[0050] Figure 10 It is the partial sectional view of adjustable bed frame reaching first inclination angle in example two of the utility model Figure 1 ;

[0051] Figure 11 It is the partial sectional view of adjustable bed frame reaching first inclination angle in example two of the utility model Figure 2 ;

[0052] Figure 12 It is the structure schematic drawing of lifting mechanism when adjustable bed frame reaches first inclination angle in example two of the utility model;

[0053] Figure 13 It is the sectional view of lifting mechanism when adjustable bed frame reaches first inclination angle in example two of the utility model;

[0054] Figure 14 for Figure 13 a partial enlarged view in the figure;

[0055] Figure 15 for a partial sectional view of the adjustable bed frame reaching the second inclination angle in the second embodiment of the utility model;

[0056] Figure 16 for a structure schematic view of the lifting mechanism when the adjustable bed frame reaches the second inclination angle in the second embodiment of the utility model;

[0057] Figure 17 for a partial sectional view of the adjustable bed frame reaching the third inclination angle in the second embodiment of the utility model;

[0058] Figure 18 for a structure schematic view of the lifting mechanism when the adjustable bed frame reaches the third inclination angle in the second embodiment of the utility model;

[0059] Figure 19 for a structure schematic view of the adjustable bed frame in the maximum adjustment angle in the second embodiment of the utility model.

[0060] Reference signs: 11, fixed bed frame; 111, support frame; 1111, bottom plate; 1112, side plate; 12, adjustable bed frame; 121, first support; 13, first leg plate; 14, second leg plate; 21, linear actuator; 211, motor; 212, screw rod; 213, nut; 22, sliding component; 221, guide hole; 222, second pushing part; 223, first roller; 225, hinged shaft; 226, sliding pad; 23, second driven support; 231, third driven support; 2311, limiting plate; 232, connecting rod; 2321, protruding block; 2322, guide surface; 233, second roller; 24, second driving support; 25, third driving support; 251, clamping groove. DETAILED DESCRIPTION

[0061] The technical solutions of the embodiments of the utility model will be explained and described below in combination with the drawings of the embodiments of the utility model, but the following embodiments are only preferred embodiments of the utility model, and not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without making creative efforts all belong to the protection scope of the utility model.

[0062] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0063] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0064] Example 1:

[0065] like Figures 1 to 6 As shown, this embodiment illustrates an adjustable bed frame, including a fixed bed frame 11, an adjustable bed frame 12, a primary lifting mechanism, a secondary lifting mechanism, and a secondary lifting mechanism. The fixed bed frame 11 is equipped with a linear actuator 21 and a sliding component 22. The sliding component 22 is slidably supported on the fixed bed frame 11. The linear actuator 21 drives the sliding component 22 to reciprocate linearly along the longitudinal direction of the fixed bed frame 11. The sliding component 22 has a first pushing part and a second pushing part. The lifting mechanism includes a primary lifting mechanism and a secondary lifting mechanism. The adjustable bed frame 12 is pivotally connected to the fixed bed frame 11 and can be rotated relative to the fixed bed frame 11 to change its tilt angle. The lifting mechanism includes a first support 121 fixed to the adjustable bed frame 12. The first support 121 has a slope. The secondary lifting mechanism includes a second active support 24 and a second passive support 23. One end of the second passive support 23 is pivotally connected to the fixed bed frame 11, and the other end is pivotally connected to the second active support 24. The first stroke of the sliding component 22 causes the first pushing part to push the first support 121 along the slope to lift the adjustable bed frame 12 to a first tilt angle. The second stroke of the sliding component 22 causes the second pushing part to push the second active support 24 to lift the adjustable bed frame 12 to a second tilt angle. The first stroke and the second stroke are sequential and continuous in the same direction.

[0066] The adjustable bed frame lifting mechanism in the embodiment includes a first lifting mechanism and a second lifting mechanism, the sliding component 22 has a first pushing part and a second pushing part, in the first stroke of the sliding component 22, the first pushing part pushes the first support 121 along the slope surface, the first pushing part gradually lifts the adjustable bed frame 12 through the slope surface, so that the adjustable bed frame 12 is gradually lifted from the lying state to increase the inclination angle of the adjustable bed frame 12, and in the lifting process, the sliding component 22 is supported by the first pushing part on the adjustable bed frame 12, at this time, the force received by the sliding component 22 has a vertical component greater than a horizontal component, and the fixed bed frame 11 can support and disperse the vertical component received by the sliding component 22, so that the linear actuator 21 only needs to overcome the horizontal component received by the sliding component 22 and the friction between the sliding component 22 and the fixed bed frame 11 to drive the sliding component 22 to slide, without overcoming the weight of the entire adjustable bed frame 12, so that the output thrust of the linear actuator 21 can be greatly reduced, which helps to prolong the service life of the linear actuator 21, and at the same time, the linear actuator 21 can push a larger load, and the maximum load of the electric bed frame is improved.

[0067] In addition, the second lifting mechanism in the embodiment includes a second driving support 24 and a second driven support 23 that are pivotally connected to each other, in the second stroke of the sliding component 22, the second pushing part pushes the second driving support 24 to rotate, the second driving support 24 drives the second driven support 23 to rotate around the fixed bed frame 11 in the rotating process, the second driven support 23 supports and lifts the adjustable bed frame 12 to a second inclination angle, and as the sliding component 22 slides, the inclination angle of the second driving support 24 gradually increases under the action of the second pushing part, so that the horizontal component of the second driving support 24 acting on the second pushing part gradually decreases, and the linear actuator 21 still only needs to overcome the horizontal component received by the sliding component 22 and the friction between the sliding component 22 and the fixed bed frame 11 to drive the sliding component 22 to slide, without overcoming the weight of the entire adjustable bed frame 12, so that the linear actuator 21 still only needs to output a smaller thrust to push a larger load, which improves the maximum load of the electric bed frame, and at the same time, prolongs the service life of the linear actuator 21.

[0068] Secondly, in the process of switching the sliding component 22 from the first stroke to the second stroke, the support of the sliding component 22 to the adjustable bed frame 12 is switched from the first pushing part to the second pushing part, and the first stroke and the second stroke of the sliding component 22 are in the same direction and continuous, which makes the switching of the support point of the sliding component 22 to the adjustable bed frame 12 more gentle, helps to keep the adjustable bed frame 12 stable, avoids the possibility of sudden drop of the adjustable bed frame 12, and helps to improve the user experience.

[0069] As shown in Figure 2 and Figure 3 In the embodiment, the fixed bed frame 11 is formed by a rectangular frame surrounded by beams, the bottom of the inner side of the beams is provided with a support plate, one end of the adjustable bed frame 12 is rotationally connected to the middle of the support frame 111, and the adjustable bed frame 12 is rotated relative to the fixed bed frame 11 to adjust the inclination angle. When the adjustable bed frame 12 is in a lying state, the adjustable bed frame 12 is embedded in the fixed bed frame 11 and is supported by the support plate, the support plate can limit the rotation of the adjustable bed frame 12 towards the lower side of the fixed bed frame 11, and ensure that the adjustable bed frame 12 can rotate towards the upper side of the fixed bed frame 11. At this time, the adjustable bed frame 12 is parallel to the fixed bed frame 11, and at least most of the adjustable bed frame 12 is within the thickness range of the fixed bed frame 11.

[0070] As shown in Figure 2 When the adjustable bed frame 12 is in a lying state, the sliding part 22 is in an initial position at the same time, at this time the adjustable bed frame 12 is embedded in the fixed bed frame 11, and the first lifting mechanism and the second lifting mechanism do not exceed the top end face of the fixed bed frame 11. The first support 121 has a slope surface facing the sliding part 22, and the height of the first support 121 gradually increases away from the sliding part 22, and the maximum height of the first support 121 is less than the height of the fixed bed frame 11. Therefore, the first lifting mechanism and the second lifting mechanism do not raise the adjustable bed frame 12, so that the adjustable bed frame 12 and the fixed bed frame 11 can be kept compact, thereby reducing the thickness of the entire adjustable bed frame when the adjustable bed frame 12 is in a lying state.

[0071] As shown in Figures 2 to 4As shown, the linear actuator 21 in this embodiment includes a motor 211, a screw rod 212, and a nut 213 sleeved on the screw rod 212. The sliding part 22 is fixed with the nut 213 in threaded transmission connection with the screw rod 212. The nut 213 is fixedly connected with the sliding part 22. The fixed support is provided with a guide rail sliding surface for the reciprocating movement of the sliding part 22. The length direction of the sliding surface guide rail is parallel to the longitudinal direction of the fixed support. The sliding part 22 is placed on the sliding surface guide rail and is in sliding cooperation with the sliding surface guide rail. The sliding surface guide rail supports the sliding part 22. The motor 211 is fixed at one end of the sliding surface guide rail. The output end of the motor 211 is in transmission connection with the screw rod 212. The length direction of the screw rod 212 is parallel to the length direction of the sliding surface guide rail. The motor 211 drives the screw rod 212 to rotate. The screw rod 212 drives the sliding part 22 to reciprocally slide along the sliding surface guide rail through the nut 213. The sliding part 22 lifts the adjustable bed frame 12 through the primary lifting mechanism and the secondary lifting mechanism to realize the adjustment of the inclination angle of the adjustable bed frame 12. It should be noted that the motor 211 in this embodiment is installed at the end of the sliding surface guide rail away from the hinge of the adjustable bed frame 12. The screw rod 212 is a push rod. The motor 211 drives the screw rod 212 to drive the sliding part 22 away from the motor 211, thereby driving the adjustable bed frame 12 to rotate. Of course, it can be understood that in other embodiments, the motor 211 can also be installed at the end of the sliding surface guide rail close to the hinge of the adjustable bed frame 12. In this embodiment, the screw rod 212 is a pull rod. The motor 211 drives the screw rod 212 to drive the sliding part 22 close to the motor 211, thereby driving the adjustable bed frame 12 to rotate.

[0072] In order to reduce the space occupied by the fixed support, the push-pull direction of the linear actuator 21 in this embodiment is parallel to the longitudinal direction of the fixed bed frame 11. The linear actuator is in the thickness range of the fixed bed frame 11. The linear actuator 21 is in the thickness range of the fixed bed frame 11, so that the connection structure of the fixed bed frame 11 and the linear actuator 21 is more compact, and the installation of the linear actuator 21 will not affect the thickness of the fixed bed frame 11, which helps to reduce the thickness of the overall adjustable bed frame when the adjustable bed frame 12 is in a flat lying state, thereby reducing the packaging size of the adjustable bed frame, facilitating the transportation and storage of the adjustable bed frame. In addition, the sliding part 22 slides along the longitudinal direction of the fixed bed frame 11 under the drive of the linear actuator 21. The sliding part 22 acts on the primary lifting mechanism and the secondary lifting mechanism to rotate towards the upper side of the fixed bed frame 11. Therefore, during the rotation of the adjustable bed frame 12, the linear actuator 21 and the sliding part 22 will not protrude towards the bottom of the fixed bed frame 11, that is, the adjustable bed frame will not affect the space below the fixed bed frame 11 during use. No space needs to be reserved below the fixed bed frame 11 during installation, so that the installation of the adjustable bed frame is more simple and convenient, and the installation space of the adjustable bed frame can also be reduced.

[0073] In the process that the linear actuator 21 pushes the sliding component 22 to slide from the initial position towards the first support 121, the sliding component 22 drives the first pushing part to move below the first support 121, so that the first pushing part abuts against the slope surface of the first support 121, the height of the first support 121 gradually increases away from the sliding component 22, and the first pushing part pushes the first support 121 to gradually rise along the slope surface, and the adjustable bed frame 12 rotates relative to the fixed bed frame 11 along with the first support 121, that is, the first pushing part and the first support 121 can lift the adjustable bed frame 12 from the lying state, and in the lifting process, the sliding component 22 supports the adjustable bed frame 12 through the first pushing part, at this time, the force in the vertical direction on the sliding component 22 is greater than the force in the horizontal direction, and the fixed bed frame 11 can support the sliding component 22 to disperse the force in the vertical direction, so that the linear actuator 21 only needs to overcome the force in the horizontal direction on the sliding component 22 and the friction between the sliding component 22 and the fixed bed frame, and does not need to overcome the weight of the entire adjustable bed frame 12, so that the output thrust of the linear actuator 21 can be greatly reduced, which helps to prolong the service life of the linear actuator 21, and also enables the linear actuator 21 to push a larger load and improve the maximum load of the adjustable bed frame.

[0074] In order to reduce the friction between the first pushing part and the first support 121, the first pushing part in the embodiment is a first roller 223 rotationally connected with the sliding component 22, and the first roller 223 is located at the top end of the sliding component 22 close to the first support 121, so that the sliding component 22 and the first support 121 form rolling friction, thereby reducing the friction between the sliding component 22 and the first support 121, and reducing the output thrust of the linear actuator 21 when the adjustable bed frame 12 is lifted.

[0075] As Figure 2 and Figure 3As shown, the left end of the second driven bracket 23 is pivotally connected with the fixed bed bracket 11, the right end of the second driven bracket 23 is pivotally connected with the second driving bracket 24, the right end of the second driven bracket 23 is rotatably connected with a second roller 233, the sliding component 22 has a step portion, when the sliding component 22 is in the initial position, the bottom end of the second roller 233 is lower than the surface of the step portion, in the first stroke, the end of the step portion will contact the second roller 233, and the second roller 233 is lifted by the curved surface of the second roller 233, so that the bottom end of the second roller 233 is placed on the surface of the step portion, so that the second driving bracket 24 and the second driven bracket 23 are pre-lifted, at this time, the end of the second driven bracket 23 pivotally connected with the second driving bracket 24 is also lifted by the second roller 233, so that the pivotally connected portion of the second driving bracket 24 and the second driven bracket 23 is higher than the end of the second driving bracket 24 connected with the second pushing portion, that is, the left end of the second driving bracket 24 is higher than the right end of the second driving bracket 24, at this time, the second driving bracket 24 is in an inclined state, that is, an included angle is formed between the second driving bracket 24 and the fixed bed bracket 11.

[0076] Of course, it can be understood that when the sliding component 22 is in the initial position, the second driving bracket 24 has formed a reserved inclined angle with the fixed bed bracket 11, when the second roller 233 is lifted by the second guide rail, the inclined angle between the second driving bracket 24 and the fixed bed bracket 11 can become larger, and then the pushing force required by the second pushing portion to push the second driving bracket 24 is smaller, which helps to reduce the output pushing force required by the linear actuator 21.

[0077] As Figures 2 to 4As shown, the sliding part 22 in this embodiment is provided with a strip-shaped guide hole in the linear motion direction, and the right end of the guide hole constitutes the second pushing part. The second pushing part includes a slide rail, the length direction of the slide rail guide hole 221 is parallel to the longitudinal direction of the fixed bed frame 11, and the right end of the second driving support 24 is provided with a rotating shaft guide shaft. The rotating shaft guide shaft penetrates through the slide rail guide hole 221 and forms a sliding fit with the slide rail guide hole 221. When the sliding part 22 is in the initial position, the right end of the second driving support 24 is at the leftmost end of the slide rail guide hole 221, that is, the slide rail guide hole 221 is close to the end of the second driven support 23. When the linear actuator 21 drives the sliding part 22 to slide in the first stroke, the sliding part 22 and the second driving support 24 form relative sliding, the second driving support 24 slides along the sliding groove, and the right end of the second driving support 24 slides from the left end of the slide rail guide hole 221 to the right end of the slide rail. When the sliding part 22 enters the starting point of the second stroke, the slide rail second pushing part limits the right end of the second driving support 24 at this time, and the groove wall of the slide rail right end second pushing part is a circular arc shape matched with the rotating shaft guide shaft. After the rotating shaft guide shaft abuts against the right end second pushing part of the slide rail, the rotating shaft guide shaft and the slide rail second pushing part form a rotating fit, that is, the second driving support 24 and the sliding part 22 form a pivot connection. In the process of continuous sliding of the sliding part 22, the sliding part 22 will exert a horizontal thrust on the right end of the second driving support 24, so that the second driving support 24 gradually rotates upward around the rotating shaft guide shaft, and the second driving support 24 drives the second driven support 23 to synchronously rise.

[0078] It should be noted that when the second driving support 24 abuts against the right end second pushing part of the slide rail, the adjustable bed frame 12 has not reached the first inclination angle, that is, the first roller 223 has not reached the lowest position of the slope surface, and the first roller 223 has not separated from the first support 121. At this time, the sliding part 22 still supports the adjustable bed frame 12 through the first roller 223, that is, there is basically no force between the secondary lifting mechanism and the adjustable bed frame 12 at this time. Therefore, the second driving support 24 can easily drive the second driven support 23 to lift and continuously increase the inclination angle between the second driving support 24 and the fixed bed frame 11. In the process of gradually increasing the inclination angle of the second driving support 24 driven by the second pushing part through the horizontal thrust, the smaller the inclination angle of the second driving support 24, the greater the horizontal thrust required by the sliding part 22. At the stage when the inclination angle of the second driving support 24 is small, the adjustable bed frame 12 is supported by the first roller 223, and there is basically no force between the secondary lifting mechanism and the adjustable bed frame 12. Therefore, the resistance received by the second driving support 24 and the second driven support 23 during rotation is also very small, and the resistance of the second driving support 24 to the sliding part 22 is much smaller than the resistance of the adjustable bed frame 12 to the sliding part 22. Therefore, the rotation of the second driving support 24 in this stage will not generate additional burden on the linear actuator 21, so that the linear actuator 21 can still maintain a small thrust output.

[0079] As Figure 4 shown, when the first roller 223 is at the lowest position of the slope surface of the first support 121, the adjustable bed frame 12 is lifted to the first inclination angle, and the first roller 223 is about to be separated from the slope surface, while the second active support 24 has formed a larger inclination angle under the pushing of the second pushing part, and the right end of the second driven support 23 is also lifted by the second active support 24, and after the first roller 223 is separated from the slope surface, the sliding part 22 enters the second stroke, and the second active support 24 supports the adjustable bed frame 12 through the second driven support 23, at this time, the support of the sliding part 22 to the adjustable bed frame 12 is transferred from the first roller 223 to the second active support 24, and since the first stroke and the second stroke of the sliding part 22 are successive and continuous in the same direction, the second active support 24 has supported the second driven support 23 before the adjustable bed frame 12 reaches the first inclination angle, so that the transfer of the support point is more gentle, the adjustable bed frame 12 can be lifted stably, and the possibility of sudden drop of the adjustable bed frame 12 is avoided, which helps to improve the user experience; in addition, when the first roller 223 is separated from the slope surface of the first support 121, since the inclination angle of the second active support 24 is large, the horizontal component of the force acting on the second active support 24 is small, and as the sliding part 22 continues to slide, the horizontal component of the force acting on the second active support 24 will gradually decrease, while the linear actuator 21 still only needs to overcome the horizontal component of the force acting on the sliding part 22 and the friction between the sliding part 22 and the fixed bed frame 11, without needing to overcome the weight of the entire adjustable bed frame 12, so the linear actuator 21 still only needs to output a small thrust to push a larger load, which improves the maximum load of the adjustable bed frame and also prolongs the service life of the linear actuator 21.

[0080] As Figure 4 and Figure 5As shown, in the second stroke of the sliding component 22 in the embodiment, the second pushing part is lifted by the second driving support 24, the second roller 233 at the right end of the second driven support 23 abuts against the adjustable bed frame 12, and then the adjustable bed frame 12 is lifted to the second inclination angle. Since the pivoting joint of the second driven support 23 and the adjustable bed frame 12 does not coincide, when the second driven support 23 drives the adjustable bed frame 12 to rotate, the contact point between the second driven support 23 and the adjustable bed frame 12 is constantly changing. The right end of the second driven support 23 is rotationally connected with the second roller 233, the second driven support 23 abuts against the adjustable bed frame 12 through the second roller 233, which can form rolling friction between the second driven support 23 and the adjustable bed frame 12, thereby reducing the friction between the second driven support 23 and the adjustable bed frame 12, and the output thrust required by the linear actuator 21, and reducing the possibility of wear between the second driven support 23 and the adjustable bed frame 12, which helps to prolong the service life of the second driven support 23 and the adjustable bed frame 12.

[0081] In the embodiment, the first pushing part detachably supports the first support 121 when the adjustable bed frame 12 is at the first inclination angle, and the second pushing part detachably supports the second driving support 24 when the adjustable bed frame 12 is at the second inclination angle, so that the adjustable bed frame 12 is lowered by gravity rather than being forcibly driven by the lowering torque of the linear actuator 21. When the sliding component 22 reversely slides under the driving of the linear actuator 21 during the process of lowering the adjustable bed frame 12 from the second inclination angle, the second pushing part will be separated from the second driving support 24, thereby blocking the power transmission between the linear actuator 21 and the second driving support 24, so that the adjustable bed frame 12 only relies on gravity to descend. During the process of descending, the friction between the sliding component 22 and the fixed bed frame 11 also forms resistance to the descent of the adjustable bed frame 12, further slowing down the descent speed of the adjustable bed frame 12. If the user's fingers are clamped between the adjustable bed frame 12 and the fixed bed frame 11, the force acting on the fingers is smaller than the force generated by the weight of the adjustable bed frame 12, which reduces the injury to the fingers or other limbs, and helps to improve the use safety of the electric bed frame. Similarly, when the linear actuator drives the sliding component 22 to slide during the process of lowering the adjustable bed frame 12 from the first inclination angle, the first pushing part will also be separated from the first support 121, thereby blocking the power transmission between the linear actuator 21 and the first support 121.

[0082] The fixed bed frame 11 in the embodiment is provided with a support frame 111 along its longitudinal direction, the support frame 111 comprises a bottom plate 1111 for supporting the sliding component 22 and a side plate 1112 for limiting the sliding direction of the sliding component 22, the upper surface of the bottom plate 1111 forms the sliding surface, the bottom of the sliding component 22 is provided with a sliding pad 226 for reducing friction, the sliding component 22 is in sliding fit with the fixed bed frame 11 through the sliding pad 226, the sliding pad 226 extends partially between the sliding component 22 and the side plate 1112, the two sides of the partial sliding pad 226 are in contact with the side wall of the sliding component 22 and the side plate 1112 respectively, the friction between the sliding component 22 and the fixed bed frame 11 can be effectively reduced through the sliding pad 226, the horizontal component force borne by the sliding component 22 and the friction between the sliding component 22 and the fixed bed frame 11 need to be overcome by the linear actuator 21 during the lifting process of the adjustable bed frame 12, after the friction is reduced, the output thrust required by the linear actuator 21 can be further reduced, the linear actuator 21 can push a larger load, which helps to improve the maximum load of the adjustable bed frame 12; secondly, the partial sliding pad 226 is between the sliding component 22 and the side plate 1112, which can avoid the direct contact between the sliding component 22 and the side plate 1112, reduce the possibility of wear of the side wall of the sliding component 22, and also reduce the friction between the sliding component 22 and the side plate 1112; in addition, the partial sliding pad 226 is filled between the sliding component 22 and the side plate 1112, the sliding pad 226 and the side plate 1112 can limit the sliding direction of the sliding component 22, ensure that the sliding component 22 can slide along the longitudinal direction of the fixed bed frame 11, prevent the sliding component 22 from deviating or shaking in the width direction of the fixed bed frame 11, so that the sliding of the sliding component 22 is more stable and reliable.

[0083] Of course, it can be understood that in other embodiments, the sliding pad 226 can also be fixed on the sliding surface.

[0084] Of course, it can be understood that in other embodiments, the sliding component 22 and the sliding surface can also form rolling friction.

[0085] The support of each lifting mechanism in the embodiment is a pair of support rods, and the two support rods are distributed in the width direction of the fixed bed frame 11, that is, the first lifting mechanism has two first supports 121, the second lifting mechanism has two second driven supports 23 and two second driving supports 24, and in order to ensure that the two second driven supports 23 can rotate synchronously, the two second driven supports 23 are of an integrated structure in the embodiment, and the second driving supports 24 are respectively pivoted to the two sides of the second driven supports 23. Correspondingly, the sliding part 22 is provided with two first pushing parts corresponding to the first supports 121 and two second pushing parts corresponding to the second driving supports 24. The use of the pair of supports can increase the support position of the lifting mechanism on the adjustable bed frame 12, make the support of the lifting mechanism on the adjustable bed frame 12 more stable, and reduce the possibility of swinging or shaking of the adjustable bed frame 12 during lifting. In addition, it can also reduce the pressure on each support rod and reduce the possibility of deformation or fracture of the support rod.

[0086] In order to reduce the friction between the sliding part 22 and the fixed bed frame 11, the bottom of the sliding part 22 is provided with a sliding pad 226 for reducing friction in the embodiment. The sliding part 22 is in sliding fit with the fixed bed frame 11 through the sliding pad 226. The sliding pad 226 can effectively reduce the friction between the sliding part 22 and the fixed bed frame 11. During the lifting process of the adjustable bed frame 12, the linear actuator 21 needs to overcome the horizontal component of the force received by the sliding part 22 and the friction between the sliding part 22 and the fixed bed frame 11. After the friction is reduced, the required output thrust of the linear actuator 21 can be further reduced, so that the linear actuator 21 can push a larger load, which helps to improve the maximum load of the adjustable bed frame. Of course, it can be understood that in other embodiments, the sliding part 22 and the fixed bed frame 11 can also form rolling friction, which helps to reduce the possibility of damage to the sliding part 22 and the fixed bed frame 11 due to friction, and can effectively prolong the service life of the sliding part 22 and the fixed bed frame 11.

[0087] Embodiment two:

[0088] As Figures 7 to 19The main difference between the present embodiment and embodiment one is that the lifting mechanism of the present embodiment further comprises a third lifting mechanism, the third lifting mechanism comprises a third driving support 25 and a third driven support 231, the third driven support 231 is a part of the second driven support 23, the second driven support 23 further comprises a connecting rod 232, one end of the connecting rod 232 is pivotally connected with the right end of the third driven support 231, the other end of the connecting rod 232 is pivotally connected with the second driving support 24, the third driving support 25 is pivotally connected with the middle part of the third driven support 231, the sliding component 22 has a third pushing part, the third stroke of the sliding component 22 makes the third pushing part push the third driving support 25 to lift the adjustable bed frame 12 to a third inclination angle, the third stroke and the second stroke are in the same direction and successive and continuous, in the third stroke of the sliding component 22, the third pushing part pushes the third driving support 25 to rotate, the third driving support 25 drives the third driven support 231 to rotate around the fixed bed frame 11 in the process of rotating, the third driven support 231 supports the adjustable bed frame 12 and lifts the adjustable bed frame 12 to the third inclination angle, with the sliding of the sliding component 22, the third driving support 25 gradually increases the inclination angle under the action of the third pushing part, therefore, the horizontal component force of the third driving support 25 acting on the third pushing part gradually decreases, and the linear actuator 21 only needs to overcome the horizontal component force and the friction between the sliding component 22 and the fixed bed frame 11 to drive the sliding component 22 to slide, without overcoming the weight of the whole adjustable bed frame 12, therefore, the linear actuator 21 still only needs to output a small thrust to push a larger load, which improves the maximum load of the electric bed frame and prolongs the service life of the linear actuator 21.

[0089] The angle of the adjustable bed frame 12 lifted in the third stroke is greater than the angle of the adjustable bed frame 12 lifted in the second stroke, and the angle of the adjustable bed frame 12 lifted in the third stroke is greater than the angle of the adjustable bed frame 12 lifted in the first stroke, the third stroke of the sliding component 22 can greatly increase the adjustment range of the adjustable bed frame 12, which can adapt to various different needs of users; in addition, with the continuous increase of the inclination angle of the adjustable bed frame 12, the thrust required by the linear actuator 21 to push the sliding component 22 gradually decreases, and at the beginning of the third stroke, the inclination angle of the adjustable bed frame 12 is already large, therefore, in the third stroke of the sliding component 22, the thrust required by the linear actuator 21 to output is small, that is, the linear actuator 21 still only needs to output a small thrust to realize the large-range angle adjustment of the adjustable bed frame 12.

[0090] As Figures 7 to 9As shown, in this embodiment, when the sliding component 22 is in the initial position, the left end of the third active support 25 is pivotally connected to the third driven support 231, and the right end of the third active support 25 hangs down naturally and extends towards the sliding component 22. At this time, the right end of the third active support 25 is placed on the guide rail of the fixed bed frame 11, and the third active support 25 and the sliding component 22 are separated from each other.

[0091] like Figure 9 As shown, in order to enable the secondary lifting mechanism to be pre-lifted during the first stroke of the sliding component 22, the end of the connecting rod 232 pivotally connected to the second active support 24 in this embodiment is provided with a protrusion 2321 protruding towards the fixed bed frame 11. The side of the protrusion 2321 facing the sliding component 22 is provided with a guide surface 2322. When the sliding is in the initial position, the bottom end of the protrusion 2321 is lower than the surface of the step. During the first stroke of the sliding component 22, the end of the step will contact the guide surface 2322, and the protrusion 2321 will be lifted through the guide surface 2322, so that the bottom end of the protrusion 2321 is placed... The connecting rod 232 and the second active support 24 are pre-lifted on the surface of the stepped part. At this time, the end of the second driven support 23 and the second active support 24 that are pivotally connected is also lifted under the action of the protrusion 2321, so that the pivot point of the second active support 24 and the second driven support 23 is higher than the end of the second active support 24 connected to the second push part, that is, the left end of the second active support 24 is higher than the right end of the second active support 24. At this time, the second active support 24 is in an inclined state, that is, an angle is formed between the second active support 24 and the fixed bed frame 11, thereby realizing the pre-lifting of the second active support 24.

[0092] It should be noted that the protrusion 2321 and the connecting rod 232 are an integral structure. In addition, when the sliding component 22 is in the initial position, the bottom end of the protrusion 2321 is the lowest position of the connecting rod 232. The height difference between the bottom end of the protrusion 2321 and the highest position of the connecting rod 232 is less than the thickness of the fixed bed frame 11, so as to avoid the connecting rod 232 interfering with the flat position of the adjustable bed frame 12. Secondly, in this embodiment, when the sliding component 22 is in the initial position, the second active support 24 can also be in an inclined state, that is, the left end of the second active support 24 is higher than the right end of the second active support 24. In the initial position, the second active support 24 facilitates the fixed bed frame 11 to form a reserved tilt angle. When the protrusion 2321 is lifted by the step, the tilt angle between the second active support 24 and the fixed bed frame 11 can become larger. Then the sliding component 22 requires less thrust to push the second active support 24, which helps to reduce the thrust required by the linear actuator 21.

[0093] It is understandable that, in other embodiments, the protrusion 2321 may also be disposed at the end of the second active support 24.

[0094] likeFigures 10 to 14 As shown, when the adjustable bed frame 12 reaches the first inclination angle, the first roller 223 of the sliding component 22 reaches the position where the first support 121 is about to be separated from the lowest position of the slope surface, the second pushing part pushes the second driving support 24 to lift up, the second driving support 24 drives the connecting rod 232 to lift up and abut against the adjustable bed frame 12, the sliding component 22 is supported by the second driving support 24 on the connecting rod 232, the third driven support 231 is provided with a limiting plate 2311 on the side of the adjustable bed frame 12, the left end of the connecting rod 232 extends to the lower side of the limiting plate 2311, when the right end of the connecting rod 232 is pushed upward by the second driving support 24, the connecting rod 232 abuts against the limiting plate 2311, at this time, the third driven support 231 and the connecting rod 232 can be regarded as a complete second driven support 23, that is, the second driving support 24 drives the second driven support 23 to rotate upward, and the limiting plate 2311 can limit the rotation of the connecting rod 232 toward the adjustable bed frame 12, in the second stroke of the sliding component 22, the second driving support 24 pushes the connecting rod 232, and the connecting rod 232 drives the third driven support 231 to lift up synchronously through the limiting plate 2311, at this time, the connecting rod 232 and the limiting plate 2311 form a stable whole, so that the support between the second driving support 24 and the connecting rod 232 is stable and reliable, and the adjustable bed frame 12 can be lifted smoothly, which helps to improve the user experience.

[0095] In order to reduce the possibility of wear between the connecting rod 232 and the adjustable bed frame 12, the right end of the connecting rod 232 in the embodiment is curved toward the side of the adjustable bed frame 12, and the curved surface can reduce the contact area between the connecting rod 232 and the adjustable bed frame 12. Since the pivoting positions of the second driven support 23 and the adjustable bed frame 12 do not coincide, when the second driven support 23 drives the adjustable bed frame 12 to rotate, the contact point between the connecting rod 232 and the adjustable bed frame 12 is constantly changing, that is, sliding friction occurs between the connecting rod 232 and the adjustable bed frame 12. Reducing the contact area between the connecting rod 232 and the adjustable bed frame 12 can reduce the friction between them, and further can reduce the output pushing force required by the linear actuator 21, and also can reduce the possibility of wear between the connecting rod 232 and the adjustable bed frame 12, which helps to prolong the service life of the connecting rod 232 and the adjustable bed frame 12.

[0096] As Figure 12 , Figure 15 and Figure 16As shown, the third pushing part in the embodiment is a horizontally arranged hinge shaft 225, the axial direction of the hinge shaft 225 is perpendicular to the sliding direction of the sliding member 22, the third driving bracket 25 is provided with a clamping groove 251 near the end of the sliding member 22, the clamping groove 251 is formed with a notch towards the side of the sliding member 22, in the second stroke of the sliding member 22, the right end of the third driving bracket 25 is not forced, naturally droops and is placed on the guide rail, the notch is aligned with the hinge shaft 225, the notch is a whole trumpet mouth, that is, the width of the notch gradually increases away from the clamping groove 251, and the width of the notch on the edge of the third driving bracket 25 is greater than the diameter of the hinge shaft 225, so as to ensure that the hinge shaft 225 can pass through the notch and enter the clamping groove 251, when the adjustable bed frame 12 reaches the second inclination angle, the hinge shaft 225 is embedded in the clamping groove 251, and the hinge shaft 225 and the third driving bracket 25 are hinged, avoiding the phenomenon that the hinge shaft 225 and the third driving bracket 25 are stuck.

[0097] In addition, the adjustable bed frame 12 is supported by the third pushing part at the third inclination angle, so that the adjustable bed frame 12 is lowered by gravity rather than being forced to drive by the lowering torque of the linear actuator 21, when the sliding member 22 reversely slides under the driving of the linear actuator 21 in the process of lowering the adjustable bed frame 12 from the third inclination angle, the third pushing part is separated from the third driving bracket 25, so as to block the power transmission between the linear actuator 21 and the third driving bracket 25, so that the adjustable bed frame 12 is lowered only by gravity, and in the process of lowering, the friction between the sliding member 22 and the fixed bed frame 11 also forms resistance to the lowering of the adjustable bed frame 12, further slowing down the lowering speed of the adjustable bed frame 12, if the fingers of the user are clamped by the adjustable bed frame 12 and the fixed bed frame 11, the force acting on the fingers is smaller than the force generated by the weight of the adjustable bed frame 12, reducing the injury to the fingers or other limbs, and helping to improve the use safety of the electric bed frame.

[0098] As Figure 17 and Figure 18As shown, in the second stroke of the sliding component 22 in the present embodiment, the sliding component 22 generates a horizontal thrust on the second driving bracket 24 and rotates the right end of the second driving bracket 24 upward around the guide shaft, and the second driving bracket 24 rotates the third driven bracket 231 and the connecting rod 232 upward at the same time, so that the right end of the connecting rod 232 abuts against the adjustable bed frame 12, and the right end of the third driving bracket 25 is lifted upward during the upward rotation of the third driven bracket 231, so that the third driving bracket 25 as a whole is in an inclined state, i.e., the left end of the third driving bracket 25 is higher than the right end of the third driving bracket 25, and the left end of the third driving bracket 25 is continuously lifted upward as the third driven bracket 231 is continuously lifted upward, and the included angle between the third driving bracket 25 and the fixed bed frame 11 gradually increases, when the adjustable bed frame 12 reaches the second inclination angle, the hinge shaft 225 enters the clamping groove 251, and the sliding component 22 generates a force on the right end of the third driving bracket 25 through the hinge shaft 225, at this time, the inclination angle of the second driving bracket 24 approaches 90°, and the second driving bracket 24 has difficulty in continuously lifting the adjustable bed frame 12, the sliding component 22 supports the third driven bracket 231 through the third driving bracket 25, so that the third driven bracket 231 abuts against the adjustable bed frame 12, and the support of the sliding component 22 on the adjustable bed frame 12 is transferred from the second driving bracket 24 to the third driving bracket 25, since the left end of the third driving bracket 25 is lifted by the third driven bracket 231 before the adjustable bed frame 12 reaches the second inclination angle, a large inclination angle is formed between the third driving bracket 25 and the guide rail, when the sliding component 22 supports the adjustable bed frame 12 through the third driving bracket 25, part of the force is dispersed in the vertical direction and supported by the fixed bed frame 11, and the linear actuator 21 still only needs to overcome the horizontal component of the force received by the sliding component 22 and the friction between the sliding component 22 and the guide rail, without bearing the weight of the entire adjustable bed frame 12, so that the linear actuator 21 can still maintain a low thrust output, in the third stroke of the sliding component 22, the sliding component 22 generates a horizontal thrust on the third driving bracket 25, so that the inclination angle of the third driving bracket 25 continuously increases, at this time, the horizontal component of the force received by the sliding component 22 continuously decreases, and in the subsequent lifting process of the adjustable bed frame 12, the thrust output of the linear actuator 21 does not need to be increased, and as the adjustable bed frame 12 is continuously lifted, the distance between the second driving bracket 24 and the third driven bracket 231 gradually increases, after which the connecting rod 232 and the limiting plate 2311 are separated from each other, the connecting rod 232 rotates relative to the third driven bracket 231 and the fixed bed frame 11, the included angle between the connecting rod 232 and the second driving bracket 24 gradually increases, and the connecting rod 232 can keep the second driving bracket 24 and the third driven bracket 231 connected, so as to ensure that the linear actuator 21 can be repeatedly used, and at the same time, the connecting rod 232 can increase the distance between the third driven bracket 231 and the second driving bracket 24, thereby avoiding the limitation of the rotation of the second driving bracket 24 on the adjustable bed frame 12,The adjustable bed frame 12 has a greater rotation angle, which helps to improve the application range of the adjustable bed frame.

[0099] The third lifting mechanism in the embodiment also has two third driving supports 25, which are distributed in the width direction of the fixed bed frame 11, and the sliding part 22 also has two third driving parts, which are respectively located on both sides of the sliding part 22.

[0100] As shown in Figure 19 The fixed bed frame 11 in the embodiment is provided with two groups of adjustable bed frames 12 rotatably connected to the fixed bed frame 11 along the longitudinal direction thereof, and the ends of the two groups of adjustable bed frames 12 close to each other are respectively pivotally connected to the fixed bed frame 11. The two groups of adjustable bed frames 12 each include a back plate and a leg plate, wherein the back plate is at the head of the adjustable bed frame and is used to lift the back of the user, and the leg plate is at the leg of the adjustable bed frame and is used to lift the leg of the user. The back plate and the leg plate are distributed along the length direction of the fixed bed frame 11, and the ends close to each other of the back plate and the leg plate are hingedly connected to the fixed bed frame 11. The fixed bed frame 11 is provided with two linear actuators 21, two sliding parts 22 and two lifting mechanisms, and the two groups of lifting mechanisms independently drive the adjustable bed frame 12 to lift. One of the linear actuators 21 drives the sliding part 22 to slide and controls the back plate to rotate through the lifting mechanism, and the lifting mechanism adopts the lifting mechanism described in the embodiment, that is, the lifting mechanism includes a first lifting mechanism, a second lifting mechanism and a third lifting mechanism. The other linear actuator 21 drives the sliding part 22 to slide and controls the leg plate to rotate through the lifting mechanism, and the lifting mechanism adopts the lifting mechanism described in the first embodiment, that is, the lifting mechanism only includes a first lifting mechanism and a second lifting mechanism.

[0101] In addition, it should be noted that the leg plate in the embodiment includes a first leg plate 13 and a second leg plate 14, wherein the end of the first leg plate 13 close to the back plate is rotatably connected to the fixed bed frame 11, and the other end is hingedly connected to the second leg plate 14. The side plate 1112 of the second leg plate 14 is connected to the fixed bed frame 11 through a hinge rod, the linear actuator 21 for driving the leg plate acts on the first leg plate 13, and is used to drive the first leg plate 13 to rotate around the fixed bed frame 11. When the first leg plate 13 reaches the maximum rotation state, the first leg plate 13 and the second leg plate 14 form an inverted V shape.

[0102] Embodiment two:

[0103] The embodiment shows an electric bed, which comprises an adjustable bed frame, the adjustable bed frame comprises a fixed bed frame 11, an adjustable bed frame 12 pivoted with the fixed bed frame 11, and a lifting mechanism for driving the adjustable bed frame 12 to overturn relative to the fixed bed frame 11, and the fixed bed frame 11 is provided with a driving device for driving the adjustable bed frame 12 to overturn relative to the fixed bed frame 11 to change the inclination angle, and the adjustable bed frame adopts the adjustable bed frame as described in the embodiment one or the embodiment two.

[0104] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited to this. Those skilled in the art should understand that the present application includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification without deviating from the function and structural principle of the present application shall be included in the scope of the claims.

Claims

1. An adjustable bed frame, characterized by, The application relates to a fixed bed frame, a linear actuator and a sliding component, the sliding component is slidably supported on the fixed bed frame, the linear actuator drives the sliding component to make reciprocating linear motion along the longitudinal direction of the fixed bed frame, the sliding component has a first pushing part and a second pushing part. The adjustable bed frame is pivoted to the fixed bed frame and can be turned relative to the fixed bed frame to change the inclination angle. The lifting mechanism comprises a first lifting mechanism and a second lifting mechanism, the first lifting mechanism comprises a first support fixed to the adjustable bed frame, and the first support has a slope surface; the second lifting mechanism comprises a second driving support and a second driven support, one end of the second driven support is pivoted to the fixed bed frame, and the other end is pivoted to the second driving support. The first stroke of the sliding component drives the first pushing part to push the first support along the slope surface to lift the adjustable bed frame to a first inclination angle, the second stroke of the sliding component drives the second pushing part to push the second driving support to lift the adjustable bed frame to a second inclination angle, and the first stroke and the second stroke are continuous and successive in the same direction. The sliding component drives the second lifting mechanism to be pre-lifted in the first stroke, and the pre-lifting of the second lifting mechanism makes the second driving support be inclined relative to the fixed bed frame or increases the inclination angle of the second driving support.

2. The adjustable bed frame of claim 1, wherein: The second driving support or the second driven support is provided with a protrusion extending towards the fixed bed frame, the side of the protrusion facing the sliding component is provided with a guide surface, the sliding component has a stepped part, and the stepped part drives the protrusion to be lifted along the guide surface to pre-lift the second lifting mechanism in the first stroke.

3. The adjustable bed frame of claim 2, wherein: The first pushing part detachably supports the first support when the adjustable bed frame is at the first inclination angle, and the second pushing part detachably supports the second driving support when the adjustable bed frame is at the second inclination angle, so that the adjustable bed frame is lowered by gravity instead of being driven by the lowering torque of the linear actuator.

4. The adjustable bed frame of claim 1, wherein: The first pushing part is a first roller rotatably connected to the sliding component.

5. The adjustable bed frame of claim 4, wherein: A strip-shaped guide hole is formed in the sliding component along the linear motion direction of the sliding component, one end of the guide hole constitutes the second pushing part, the second driving support is provided with a guide shaft at the end away from the pivoted position, the guide shaft is inserted into the guide hole and slides relative to the guide hole along the first stroke of the sliding component, and the second stroke starts when the guide shaft abuts against the second pushing part.

6. The adjustable bed frame of claim 4, wherein: The lifting mechanism further comprises a third lifting mechanism, the third lifting mechanism comprises a third driving support and a third driven support, the third driven support is pivoted to the fixed bed frame and the third driving support, the sliding component has a third pushing part, the third stroke of the sliding component drives the third pushing part to push the third driving support to lift the adjustable bed frame to a third inclination angle, and the third stroke and the second stroke are continuous and successive in the same direction.

7. The adjustable bed frame of claim 1, wherein: The angle of the adjustable bed frame lifted in the third stroke is greater than the angle of the adjustable bed frame lifted in the second stroke, and the angle of the adjustable bed frame lifted in the third stroke is greater than the angle of the adjustable bed frame lifted in the first stroke.

8. The adjustable bed frame of claim 7, wherein: The sliding component drives the third lifting mechanism to be pre-lifted in the second stroke, and the pre-lifting of the third lifting mechanism makes the third driving support increase the inclination angle relative to the fixed bed frame.

9. The adjustable bed frame of claim 7, wherein: ​ 10. The adjustable bed frame of claim 9, wherein: The third driven support is synchronous with the second driven support in the second stroke, and the third driving support extends from the end of the third driven support away from the third driving support and naturally droops.

11. The adjustable bed frame of claim 7, wherein: The third driving part detachably supports the third driving support at the third inclination angle, so that the adjustable bed frame is lowered by gravity instead of being forced to drive by the lowering torque of the linear actuator.

12. The adjustable bed frame of claim 11, wherein: The third driving part is a horizontal hinge shaft, the axial direction of the hinge shaft is perpendicular to the sliding direction of the sliding part, the end of the third driving support close to the sliding part is provided with a clamping groove, the side of the clamping groove facing the sliding part is formed into a notch, and the hinge shaft is embedded in the clamping groove and pivotally connected with the third driving support in the third stroke.

13. The adjustable bed frame of claim 7, wherein: The third driven support is part of the second driven support, and the second driven support further comprises a connecting rod, one end of the connecting rod is pivotally connected with the end of the third driven support, and the other end of the connecting rod is pivotally connected with the second driving support, and the third driving support is pivotally connected with the middle part of the third driven support.

14. The adjustable bed frame of claim 13, wherein: The third driven support is provided with a limiting plate on the side of the adjustable bed frame, the connecting rod is located on the lower side of the limiting plate, the sliding part pushes the connecting rod against the limiting plate through the second driving support in the second stroke, the connecting rod rotates relative to the third driven support and the fixed bed frame in the third stroke of the sliding part, and the included angle between the connecting rod and the second driving support gradually increases.

15. The adjustable bed frame of claim 7, wherein: The top end of the third driven support is rotatably connected with a second roller, and the third driven support forms rolling friction with the adjustable bed frame through the second roller in the third stroke.

16. The adjustable bed frame of claim 1, wherein: The pushing and pulling direction of the linear actuator is parallel to the longitudinal direction of the fixed bed frame, and the linear actuator is located in the thickness range of the fixed bed frame.

17. The adjustable bed frame of claim 1, wherein: The supports of each lifting mechanism are a pair of support rods, and the two support rods are distributed in the width direction of the fixed bed frame.

18. The adjustable bed frame of claim 1, wherein: The fixed bed frame is provided with a sliding surface along the longitudinal direction thereof, and the sliding part slides along the sliding surface.

19. The adjustable bed frame of claim 18, wherein: The fixed bed frame is provided with a support frame along the longitudinal direction thereof, the support frame comprises a bottom plate for supporting the sliding part and a side plate for limiting the sliding direction of the sliding part, and the upper surface of the bottom plate forms the sliding surface.

20. The adjustable bed frame of claim 19, wherein: The sliding part is provided with a sliding pad for reducing friction on the bottom or the sliding surface, the sliding pad partially extends between the sliding part and the side plate, and the two sides of the sliding pad are respectively in contact with the side wall of the sliding part and the side plate.

21. The adjustable bed frame of claim 18, wherein: Rolling friction is formed between the sliding part and the sliding surface.

22. The adjustable bed frame of claim 1, wherein: The fixed bed frame is provided with two groups of adjustable bed frames along the longitudinal direction thereof, one end of the two groups of adjustable bed frames close to each other is pivotally connected to the fixed bed frame, the inclination directions of the two groups of adjustable bed frames are opposite, the adjustable bed frame has two groups of lifting mechanisms, and the two groups of lifting mechanisms independently drive the lifting of the adjustable bed frame.

23. The adjustable bed frame of claim 1, wherein: The linear actuator comprises a motor, a screw rod and a nut sleeved on the screw rod, the motor is fixed to the fixed bed frame, the screw rod is distributed along the longitudinal direction of the fixed bed frame, the output end of the motor is in transmission cooperation with the screw rod and drives the rotation of the screw rod, and the nut is fixedly connected with the sliding part.

24. An electric bed comprising an adjustable bed frame, the adjustable bed frame comprising a fixed bed frame, an adjustable bed frame pivoted to the fixed bed frame, and a lifting mechanism to drive the adjustable bed frame to pivot relative to the fixed bed frame, characterised in that, The adjustable bed frame adopts the adjustable bed frame according to any one of claims 1 to 23.

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