Handrail assembly and electric bed

Abstract

The invention relates to an armrest assembly and an electric bed. The armrest assembly comprises a fixed assembly and a movable assembly, the fixing assembly is used for being fixed to a bed frame. The movable assembly comprises a movable plate body and a handrail, the handrail is connected to the movable plate body, the movable plate body is movably connected to the fixed assembly, the movable plate body is provided with a swing end and a hinge end which are oppositely arranged in the X direction, the hinge end is hinged to the movable plate body through a rotating shaft, the swing end is provided with an arc-shaped groove, and a limiting shaft is movably connected into the arc-shaped groove; one end of the limiting shaft is located in the arc-shaped groove, and the other end is connected to the fixing assembly; a first elastic piece is arranged between the fixing assembly and the swing end. The invention further discloses an electric bed. The stability of the handrail can be effectively guaranteed, and meanwhile the handrail can flexibly move within a preset range and can be effectively centered and reset in time.

Description

Technical Field

[0001] The present invention relates to the technical field of electric beds, in particular to an armrest assembly and an electric bed. Background Art

[0002] With the development of science and technology, people's demand for intelligent electric beds is getting higher and higher. In order to better improve the convenience of using electric beds, armrests can be set on the electric beds. On the one hand, they are used to prevent falls, and on the other hand, sensors can be set on the armrests to realize intelligent feedback of user needs. For example, the state changes of the armrests are monitored by sensors, so as to monitor the user's needs of getting up and lying down and control the automatic lifting or flattening of the bed board of the electric bed. At present, the intelligent armrests with the above functions usually need to be flexibly moved within a certain range and reset in time to ensure the accuracy of each sensor monitoring. However, the existing armrests are easily squeezed laterally by the sleeper, sponge mattress, bedding, etc., and cannot be flexibly moved and reset to the center, which affects the effect of intelligent monitoring. Summary of the invention

[0003] To this end, the technical problem to be solved by the present invention is to ensure the stability of the intelligent handrail while enabling it to move flexibly within a certain range and to return to the center and reset in a timely and effective manner.

[0004] In order to solve the above technical problems, the present invention provides an armrest assembly, comprising:

[0005] A fixing component, the fixing component is used to be fixed to the bed frame;

[0006] A movable assembly, the movable assembly comprising a movable plate body and an armrest, the armrest being connected to the movable plate body, the movable plate body being movably connected to the fixed assembly, the movable plate body having a swing end and a hinge end which are arranged opposite to each other along the X direction, the hinge end being hinged to the fixed plate body through a rotating shaft, the swing end being provided with an arc groove, a limit shaft being movably connected in the arc groove, one end of the limit shaft being located in the arc groove, and the other end being connected to the fixed assembly;

[0007] A first elastic member is provided between the fixing assembly and the swing end.

[0008] In one embodiment of the present invention, the swing end of the movable plate body is provided with at least two arc-shaped grooves, all of the arc-shaped grooves are located on the same circumference, and the center of the circumference is located on the axis of the rotating shaft.

[0009] In one embodiment of the present invention, the fixing assembly includes a first fixing plate body and a second fixing plate body fixed to each other, the first fixing plate body being used to be fixed to the bed frame; the second fixing plate body is located between the first fixing plate body and the movable plate body, the hinged end of the movable plate body is hinged to the first fixing plate body through a rotating shaft, one end of the limiting shaft is located in the arc groove, and the other end passes through the second fixing plate body and is connected to the first fixing plate body.

[0010] In one embodiment of the present invention, the armrest assembly also includes a top bead, the fixed assembly is connected to the top bead via a second elastic member, the top bead is used to move toward / away from the movable plate body, a recess is provided on the side of the movable plate body facing the fixed assembly, and when the movable plate body is in a balanced position, the top bead is inserted into the recess.

[0011] In one embodiment of the present invention, a bead seat is connected to the fixing assembly, a sliding cavity is arranged inside the bead seat, and the top bead is connected to the sliding cavity through a second elastic member.

[0012] In one embodiment of the present invention, both ends of the second fixed plate along the Z direction are connected to the swing end through independent first elastic members, and the Z direction is perpendicular to the X direction.

[0013] In one embodiment of the present invention, the movable plate body includes a main body, the arc groove is located on the main body, the main body is hinged to the movable plate body through a rotating shaft, the main body is respectively provided with a first side plate portion and a second side plate portion at both ends along the X direction, a third side plate portion is formed at one end of the second fixed plate body, and the first elastic members are connected between the third side plate portion and the first side plate portion.

[0014] In one embodiment of the present invention, positioning grooves are provided on the first side plate portion and the third side plate portion, and limiting columns are provided in the positioning grooves. The positioning grooves on the first side plate portion and the third side plate portion correspond to each other one by one, and one end of each of the first elastic members is connected to the limiting column in the positioning groove of the third side plate portion, and the other end is connected to the limiting column in the corresponding positioning groove of the first side plate portion.

[0015] In one embodiment of the present invention, the armrest is U-shaped, one end of the armrest is fixed to the first side plate portion, and the other end of the armrest is fixed to the second side plate portion.

[0016] In one embodiment of the present invention, the upper portion of the first fixed baffle is bent outward to form a mounting portion.

[0017] In one embodiment of the present invention, the limiting shaft includes a cap body portion and a rod body portion, the outer diameter of the cap body portion is larger than the width of the arc groove, the rod body portion includes a first column body portion and a second column body portion which are arranged in sequence, the outer diameter of the first column body portion is larger than the outer diameter of the second column body portion, the first column body portion is located between the cap body portion and the second column body portion, the first column body portion is located in the arc groove and can slide relative to the arc groove, and the second column body portion is connected to the first fixed plate body after passing through the second fixed plate body.

[0018] In one embodiment of the present invention, a sensor for monitoring the movement state of the movable board is connected to the movable board.

[0019] In one embodiment of the present invention, the second fixing plate has a first notch at one end close to the rotating shaft, and baffles are formed on both sides of the first notch.

[0020] The present invention also discloses an electric bed, comprising a bed frame and any one of the armrest assemblies described above, wherein the fixing assembly is fixed to a side of the bed frame, and a movable bed board is also connected to the bed frame.

[0021] The above technical solution of the present invention has the following advantages compared with the prior art:

[0022] The armrest assembly and the electric bed described in the present invention can effectively ensure the stability of the armrest, while also enabling the armrest to move flexibly within a preset range and to return to the center and reset promptly and effectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0024] Figure 1 It is a structural schematic diagram of an angle of the handrail assembly of the present invention;

[0025] Figure 2 is a structural schematic diagram of the handrail assembly of the present invention from another angle;

[0026] Figure 3 yes Figure 1 Schematic diagram of the internal structure of the electrical box;

[0027] Figure 4 yes Figure 1 Schematic diagram of the structure of the middle handrail assembly after removing the handrail and electrical box;

[0028] Figure 5 yes Figure 4 A schematic diagram of the structure from another angle;

[0029] Figure 6 yes Figure 4 The main view of the structure;

[0030] Figure 7 yes Figure 4 A schematic diagram of the structure of the middle structure after removing the first elastic member;

[0031] Figure 8 yes Figure 7 Right view of the middle structure;

[0032] Fig. 9 yes Figure 7 Left view of the middle structure;

[0033] Fig.10 yes Figure 8 Sectional view of the middle structure at AA;

[0034] Fig.11 yes Fig.10 A partial enlarged view of the M in the middle;

[0035] Fig.12 yes Figure 8 Cross-sectional view of the middle structure at BB;

[0036] Fig.13 yes Figure 4 The structural diagram after removing the limit axis from the middle structure;

[0037] Fig.14 yes Fig.13 The main view of the structure;

[0038] Fig.15 It is a structural schematic diagram of the limiting shaft in the present invention;

[0039] Fig.16 yes Fig.15 A schematic structural diagram of another angle of the limit axis shown;

[0040] Fig.17 It is a schematic diagram of the installation of the top bead and the bead seat in the present invention;

[0041] Fig.18 It is a structural schematic diagram of the movable plate body in the present invention;

[0042] Fig.19 It is a schematic diagram of installing the armrest assembly on the electric bed in the present invention;

[0043] Description of the Figures in the Specification:

[0044] 10. first fixed plate; 101. mounting portion;

[0045] 20, second fixed plate; 201, third side plate; 202, first notch; 203, baffle;

[0046] 30, movable plate; 301, swing end; 3011, arc groove; 302, hinge end; 303, recessed portion; 304, main body; 305, first side plate; 3051, positioning groove; 3052, limiting column; 306, second side plate; 307, light-transmitting hole;

[0047] 40. Handrails;

[0048] 50. Rotating shaft;

[0049] 60, limit axis; 601, cap body; 602, rod body; 6021, first column body; 6022, second column body;

[0050] 70. first elastic member; 80. top bead; 90. bead seat; 100. electrical box; 110. sensor. DETAILED DESCRIPTION

[0051] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present disclosure and its application or use.

[0052] In the description of the present invention, it should be understood that the terms "vertical", "upper", "lower", "top", "side", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0053] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] Example

[0055] See also Figure 1-Figure 2 This embodiment discloses an armrest assembly having an X direction, a Y direction and a Z direction, wherein the X direction, the Y direction and the Z direction are perpendicular to each other, wherein the X direction is the front-to-back direction, i.e., the length direction of the line connecting the head and foot of the electric bed, the Y direction is the left-to-right direction, i.e., the width direction of the electric bed, and the Z direction is the height direction.

[0056] The above-mentioned handrail assembly includes a fixed assembly and a movable assembly;

[0057] The fixing component is used to fix to the bed frame;

[0058] The movable assembly includes a movable plate body 30 and an armrest 40, wherein the armrest 40 is connected to the movable plate body 30 and moves therewith, and the movable plate body 30 is movably connected to the fixed assembly;

[0059] like Figure 4-Figure 6 As shown, the movable plate body 30 has a swing end 301 and a hinge end 302 which are arranged opposite to each other along the X direction. The hinge end 302 is hinged to the fixed component through the rotating shaft 50 so that the interactive swing plate body can swing around the axis of the rotating shaft 50. Figure 12-13 As shown, the swing end 301 is provided with an arc groove 3011, and a limit shaft 60 is movably connected in the arc groove 3011. One end of the limit shaft 60 is located in the arc groove 3011, and the other end is connected to the fixed component. The arc groove 3011 plays a limiting role and can limit the swing amplitude of the movable plate body 30. When the movable plate body 30 swings, it will slide relative to the limit shaft 60. When the end of the arc groove 3011 moves to abut against the limit shaft 60, it is blocked by the limit shaft 60 and cannot continue to swing.

[0060] A first elastic member 70 is disposed between the fixed assembly and the swing end 301 for resetting the movable plate body 30 .

[0061] It should be noted that the armrest 40 is fixed together with the movable plate body 30, and the two move together as a whole. When an external force is applied to the armrest 40, the armrest 40 will drive the movable plate body 30 to swing relative to the fixed component.

[0062] By disposing the rotating shaft 50 , the movable panel and the armrest 40 can swing flexibly around the axis of the rotating shaft 50 .

[0063] In addition, in the above structure, the support stability of the armrest 40 assembly is effectively improved through the multi-point support mode of the limit shaft 60 and the rotating shaft 50, and the cooperation of the arc groove 3011 and the limit shaft 60, which can better prevent the armrest 40 from everting or turning inward (swinging in the Y direction), can better resist the lateral compression of the sleeper, mattress, etc., and can always ensure that the armrest 40 can only swing within a certain range in the plane (XZ plane), which is more conducive to the flexible movement and return to the center of the armrest 40. In addition, through the setting of the first elastic member 70, after the movable plate body 30 swings, the elastic force can be used to make the movable plate body 30 return to the center, thereby realizing the reliable reset of the armrest 40 without being stuck. Therefore, the above structure can ensure the stability of the armrest 40 while enabling it to move flexibly within a preset range and return to the center in a timely and effective manner.

[0064] Furthermore, the rotating shaft 50 and the fixed component are connected via a bearing to better ensure the swing stability and reduce wear.

[0065] In some embodiments, Figure 13-14 As shown, the swing end 301 of the movable plate body 30 is provided with at least two arc grooves 3011, all of which are located on the same circumference, and the center of the circumference is located on the axis of the rotating shaft 50; that is, all of the arc grooves 3011 are arranged around the rotating shaft 50, and the centers of the arc grooves 3011 are the same center, which is located on the axis of the rotating shaft 50. The above structure can better ensure the reliability of the swing of the movable plate body 30, so that it can maintain good swing flexibility within a certain range.

[0066] For example, two arc-shaped grooves 3011 may be provided at the swing end 301 of the movable plate body 30 , respectively located at the upper part and the lower part of the swing end 301 .

[0067] The arc groove 3011 and the rotating shaft 50 are respectively arranged on both sides of the movable plate body 30 along the X direction, so that the movable plate body 30 can obtain a larger deflection stroke with a minimum deviation angle, thereby amplifying the stroke of the sensor switch and making the signal monitoring more reliable;

[0068] During the specific arrangement, the spacing between the arc groove 3011 and the rotating shaft 50 in the X direction can be increased as much as possible.

[0069] Preferably, Figure 4-Figure 9The fixing assembly includes a first fixing plate body 10 and a second fixing plate body 20 fixed to each other, the first fixing plate body 10 is used to be fixed to the bed frame; the second fixing plate body 20 is located between the first fixing plate body 10 and the movable plate body 30, the hinge end 302 of the movable plate body 30 is hinged to the first fixing plate body 10 through the rotating shaft 50, one end of the limit shaft 60 is located in the arc groove 3011, and the other end passes through the second fixing plate body 20 and is connected to the first fixing plate body 10, so that the limit shaft 60 remains fixed, and when the movable plate body 30 swings, the end of the limit shaft 60 located in the arc groove 3011 can move relatively along the arc groove 3011.

[0070] In some embodiments, Fig.12 , Figure 15-16 As shown, the limiting shaft 60 includes a cap body portion 601 and a rod body portion 602. The outer diameter of the cap body portion 601 is greater than the width of the arc groove 3011. The rod body portion 602 includes a first column portion 6021 and a second column portion 6022 arranged in sequence. The outer diameter of the first column portion 6021 is greater than the outer diameter of the second column portion 6022. The first column portion 6021 is located between the cap body portion 601 and the second column portion 6022. The first column portion 6021 is located in the arc groove 3011 and can slide relative to the arc groove 3011. The second column portion 6022 passes through the second fixed plate body 20 and is connected to the first fixed plate body 10, which can be connected by threads or other connection methods.

[0071] In some embodiments, Figure 8 , Fig.10 , Fig.11 and Fig.18 As shown, the armrest 40 assembly also includes a top bead 80, which is located between the fixed assembly and the movable plate body 30 and can move toward / away from the movable plate body 30. The fixed assembly can be connected to the top bead 80 via a second elastic member (not shown in the figure), so that the top bead 80 can pop out or retract along the Y direction, that is, it can move toward / away from the movable plate body 30. A recessed portion 303 is provided on the side of the movable plate body 30 facing the second fixed plate body 20. When the movable plate body 30 is in a balanced position, the top bead 80 is inserted into the recessed portion 303.

[0072] Preferably, Fig.11 and Fig.17 As shown, the top ball 80 is connected to the bead seat 90. A thread can be set on the outer wall of the bead seat 92, which is connected to the first fixed plate 10 through the thread. A sliding cavity is set inside. The sliding cavity is connected to the top ball 80 through the second elastic member, so that the top ball 80 can move in the sliding cavity, that is, the top ball 80 can perform telescopic movement along the Y direction relative to the bead seat 90. When the top ball 80 retracts relative to the bead seat 90, the second elastic member is compressed. Conversely, the second elastic member resets and stretches to drive the top ball 80 to extend.

[0073] It can be understood that when no external force is applied to the armrest 40 , that is, after the armrest 40 is released, the movable plate body 30 should be in a balanced position.

[0074] A first elastic member 70 is arranged between the movable plate body 30 and the second fixed plate to form a centering reset structure, and the top bead 80 and the recessed portion 303 form another centering reset structure. By setting up the double centering reset structure, the reliable reset of the movable plate body 30 and the armrest 40 can be better ensured.

[0075] When the movable plate body 30 swings to a position far away from the equilibrium position, the top bead 80 and the recessed portion 303 are disengaged, the top bead 80 is abutted by the movable plate body 30, and the second elastic member is in a compressed state. At this time, the return to center of the movable plate body 30 mainly depends on the elastic force of the first elastic member 70, and the elastic force pulls the movable plate body 30 gradually toward the equilibrium position. At the same time, as the movable plate body 30 gets closer and closer to the equilibrium position, the elastic force applied by the first elastic member 70 to it gradually decreases, and the return force decreases. When approaching the equilibrium position, the top bead 80 will pop out and enter the recessed portion 303, thereby realizing the accurate return to center of the movable plate body 30, thereby compensating for the problem that the elastic force of the first elastic member 70 is small when approaching the equilibrium position and cannot further ensure the return effect.

[0076] It can be understood that when the movable plate body 30 approaches the equilibrium position, the top bead 80 will get closer and closer to the recessed portion 303 on the movable plate body 30, and finally the edge of the recessed portion 303 will contact the top bead 80, and the second elastic member will gradually pop out, prompting the movable plate body 30 to further move slightly (a small movement), so that the top bead 80 can stably enter the center of the recessed portion 303, thereby realizing accurate resetting of the movable plate body 30 and facilitating stable resetting.

[0077] In a preferred embodiment, Figure 4 As shown, both ends of the second fixed plate body 20 along the Z direction are connected by independent first elastic members 70 and swing ends 301; that is, first elastic members 70 are provided at both upper and lower ends of the second fixed plate body 20, so that the movable plate body 30 can effectively return to the center when performing circular motion in any direction.

[0078] Furthermore, the first elastic members 70 at the upper and lower ends of the second fixing plate 20 may be arranged in an eight-shaped configuration.

[0079] In some embodiments, the movable plate body 30 includes a main body 304, the arc groove 3011 is located on the main body 304, the main body 304 is hinged to the movable plate body 30 through the rotating shaft 50, and the two ends of the main body 304 along the X direction are respectively formed with a first side plate portion 305 and a second side plate portion 306, and one end of the second fixed plate body 20 is formed with a third side plate portion 202, and the first elastic member 70 is connected between the third side plate portion 202 and the first side plate portion 305.

[0080] Furthermore, if Figure 4 As shown, positioning grooves 3051 are provided on the first side plate portion 305 and the third side plate portion 202, and limiting columns 3052 are provided in the positioning grooves 3051. The positioning grooves 3051 on the first side plate portion 305 and the third side plate portion 202 correspond one to one. One end of each first elastic member 70 is connected to the limiting column 3052 in the positioning groove 3051 of the third side plate portion 202, and the other end is connected to the limiting column 3052 in the corresponding positioning groove 3051 of the first side plate portion 305, so as to facilitate the installation and positioning of the first elastic member 70.

[0081] For example, two positioning grooves 3051 are provided on the first side plate portion 305 and the third side plate portion 202. Each positioning groove 3051 on the first side plate portion 305 and the corresponding positioning groove 3051 on the third side plate portion 202 constitute a group of positioning structures, that is, there are two groups of positioning structures at this time, each group of positioning structures corresponds to a first elastic member 70, and in each group of positioning structures, one end of the first elastic member 70 is connected to a limiting column 3052 in a positioning groove 3051, and the other end is connected to the limiting column 3052 in the corresponding other positioning groove 3051.

[0082] Preferably, the armrest 40 is U-shaped, with one end of the armrest 40 being fixed to the first side plate portion 305 , and the other end of the armrest 40 being fixed to the second side plate portion 306 .

[0083] Furthermore, one end of the armrest 40 is fixed to the outside of the first side plate portion 305 , and the other end is fixed to the outside of the second side plate portion 306 , so as to facilitate the installation of other parts on the movable plate body 30 and avoid interference.

[0084] In some embodiments, Figure 4 As shown, the upper portion of the first fixed baffle 204 is bent outward to form a mounting portion 101 .

[0085] Specifically, the upper portion of the first fixed baffle 204 is bent in the Y direction to form a mounting portion 101 for fixing to the bed frame.

[0086] The movable plate 30 is connected to an electrical box 100. Figure 1-Figure 3As shown, a sensor 110 for monitoring the movement state of the movable plate body 30 is installed in the electrical box 100 .

[0087] The sensor 110 may be a photoelectric sensor, a magnetic field sensor, a piezoelectric sensor, etc.

[0088] Furthermore, the arc groove 3011 is located on one side of the sensor 110, and the rotating shaft 50 is located on the other side of the sensor 110. By increasing the arrangement spacing between the arc groove 3011 and the rotating shaft 50 in the X direction, the movable plate body 30 can obtain a larger deflection stroke with a minimum offset angle, thereby enlarging the stroke of the sensor switch and making the signal monitoring more reliable.

[0089] In some embodiments, Figure 5 and Fig. 9 As shown, the second fixed plate body 20 has a first notch 203 at one end close to the rotating shaft 50, and baffles 204 are formed on both sides of the first notch 203. For example, when the sensor 110 is a photoelectric sensor, the baffle 204 will block the light emitted by the photoelectric sensor, thereby triggering the photoelectric sensor. For example, when the sensor 110 is a photoelectric sensor, a light-transmitting hole 307 should be provided on the movable plate body 30 to transmit the light emitted by the photoelectric sensor. When the movable plate body 30 is in a balanced position, the baffles 204 on both sides will not block the above-mentioned light-transmitting hole 307, that is, the light emitted by the photoelectric sensor will not be blocked, so that it can be emitted from the first notch 203 through the above-mentioned light-transmitting hole 307. When the movable plate body 30 swings, the above-mentioned light-transmitting hole 307 will be partially or completely blocked by the baffle 204, so that the light signal changes. The photoelectric sensor detects the change and transmits it to the controller, which can control the lifting or lowering of the bed board of the electric bed accordingly. For a schematic diagram of the arrangement of the photoelectric sensor in the electrical box 100, please refer to Figure 3 .

[0090] In a specific arrangement, the light-transmitting holes 307 may be provided at both the upper and lower ends of the movable plate body 30 .

[0091] When the above arrangement is adopted, the above sensor 110 can also be a magnetic field sensor. The principle is similar, except that the optical signal change is replaced by the magnetic field signal change, which will not be repeated here.

[0092] The first elastic member 70 and the second elastic member may both be springs, elastic sheets or other elastic elements.

[0093] Preferably, the movable plate body 30 can swing around the axis of the rotating shaft 50 within a range of ±1°, which not only prevents the armrest 40 from swinging significantly and affecting the support stability, but also allows the armrest 40 to move flexibly within the above-mentioned swing range.

[0094] The above structure allows the armrest 40 to rotate easily. The armrest 40 can be easily rotated by pushing and pulling the armrest 40 forward and backward with a force not greater than 2 kg.

[0095] like Fig.19 As shown, this embodiment also discloses an electric bed, including a bed frame and the armrest assembly described in any of the above schemes, the fixing assembly is fixed to the side of the bed frame, and a movable bed board is also connected to the bed frame for lifting or lowering.

[0096] A mattress is placed on the bed board, and the mattress can move with the bed board; further, the upper part of the first fixed baffle 204 is bent in the Y direction to form a mounting portion 101, and the mounting portion 101 is fixed on the bed frame. If a mattress is placed on the bed board, the mounting portion 101 is located under the mattress, and only the armrest 40 can be exposed.

[0097] In some embodiments, the armrest assembly may be provided on only one side of the bed frame, or may be provided on both sides of the bed frame.

[0098] The working process of the electric bed is as follows: when a user lies on the electric bed, the user holds the armrest 40 and pulls the armrest 40 roughly forward (in the X direction), the armrest 40 and the movable plate body 30 will swing slightly counterclockwise around the rotating shaft 50, and the sensor 110 will control the bed board to lift after detecting the change of the armrest 40, and the user releases the armrest 40, the armrest 40 returns to the center and resets, while the bed board remains lifted;

[0099] When the user holds the armrest 40 and pushes it roughly backward (opposite to the X direction), the armrest 40 and the movable plate body 30 will swing slightly clockwise around the rotating shaft 50, and the sensor 110 will control the bed board to be lowered after detecting the change of the armrest 40.

[0100] In the above process, after the sensor 110 detects the movement change of the armrest 40, it can transmit the signal to the corresponding controller, and the controller controls the action of lifting / lowering the bed board.

[0101] The armrest assembly and electric bed of the above-mentioned embodiments can ensure the stability of the armrest, making it difficult for the armrest to loosen and fall off, and not easy to turn outward or inward. At the same time, it also enables the armrest to move flexibly within a preset range and to return to the center in a timely and effective manner, thereby better ensuring the accuracy and reliability of sensor monitoring.

[0102] All of the above optional technical solutions can be combined in any way to form optional embodiments of the present invention, that is, any multiple embodiments can be combined to meet the needs of different application scenarios. They are all within the protection scope of this application and will not be described one by one here.

[0103] It should be noted that the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. An armrest assembly, characterized in that: include, A fixing component, the fixing component is used to be fixed to the bed frame; A movable assembly, the movable assembly comprising a movable plate body and an armrest, the armrest being connected to the movable plate body, the movable plate body being movably connected to the fixed assembly, the movable plate body having a swing end and a hinge end which are arranged opposite to each other along the X direction, the hinge end being hinged to the fixed plate body through a rotating shaft, the swing end being provided with an arc groove, a limit shaft being movably connected in the arc groove, one end of the limit shaft being located in the arc groove, and the other end being connected to the fixed assembly; A first elastic member is provided between the fixing assembly and the swing end.

2. The armrest assembly according to claim 1, characterized in that: The swing end of the movable plate body is provided with at least two arc-shaped grooves, and all the arc-shaped grooves are located on the same circumference, and the center of the circumference is located on the axis of the rotating shaft.

3. The armrest assembly according to claim 2, characterized in that: The fixing assembly includes a first fixing plate body and a second fixing plate body fixed to each other, the first fixing plate body is used to be fixed to the bed frame; the second fixing plate body is located between the first fixing plate body and the movable plate body, the hinged end of the movable plate body is hinged to the first fixing plate body through a rotating shaft, one end of the limiting shaft is located in the arc groove, and the other end passes through the second fixing plate body and is connected to the first fixing plate body.

4. The armrest assembly according to claim 2, characterized in that: It also includes a top bead, the fixed component is connected to the top bead through a second elastic member, the top bead is used to move toward / away from the movable plate body, a recessed portion is provided on the side of the movable plate body facing the fixed component, and when the movable plate body is in a balanced position, the top bead is inserted into the recessed portion.

5. The armrest assembly according to claim 4, characterized in that: The fixing assembly is connected with a bead seat, a sliding cavity is arranged inside the bead seat, and the top bead is connected in the sliding cavity through a second elastic member.

6. The handrail assembly according to claim 3, characterized in that: Both ends of the second fixed plate along the Z direction are connected to the swing end through independent first elastic members, and the Z direction is perpendicular to the X direction.

7. The armrest assembly according to claim 3, characterized in that: The movable plate body includes a main body, the arc groove is located on the main body, the main body is hinged to the movable plate body through a rotating shaft, the main body is respectively provided with a first side plate portion and a second side plate portion at both ends along the X direction, a third side plate portion is formed at one end of the second fixed plate body, and the first elastic members are connected between the third side plate portion and the first side plate portion.

8. The armrest assembly according to claim 7, characterized in that: The first side plate portion and the third side plate portion are both provided with positioning grooves, and limiting columns are provided in the positioning grooves. The positioning grooves on the first side plate portion and the third side plate portion correspond to each other one by one, and one end of each of the first elastic members is connected to the limiting column in the positioning groove of the third side plate portion, and the other end is connected to the limiting column in the corresponding positioning groove of the first side plate portion.

9. The armrest assembly according to claim 7, characterized in that: The armrest is U-shaped, one end of the armrest is fixed to the first side plate portion, and the other end of the armrest is fixed to the second side plate portion.

10. The armrest assembly according to claim 3, characterized in that: The upper portion of the first fixed baffle is bent outward to form a mounting portion.

11. The armrest assembly according to claim 1, characterized in that: The limiting shaft includes a cap body portion and a rod body portion, the outer diameter of the cap body portion is larger than the width of the arc groove, the rod body portion includes a first column portion and a second column portion which are arranged in sequence, the outer diameter of the first column portion is larger than the outer diameter of the second column portion, the first column portion is located between the cap body portion and the second column portion, the first column portion is located in the arc groove and can slide relative to the arc groove, and the second column portion is connected to the first fixed plate after passing through the second fixed plate.

12. The armrest assembly according to claim 1, characterized in that: The movable plate body is connected with a sensor for monitoring the movement state of the movable plate body.

13. The armrest assembly according to claim 3, characterized in that: The second fixing plate has a first notch at one end close to the rotating shaft, and baffles are formed on both sides of the first notch.

14. An electric bed, characterized in that: It comprises a bed frame and the armrest assembly according to any one of claims 1 to 13, wherein the fixing assembly is fixed to the side of the bed frame, and a movable bed board is also connected to the bed frame.

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