Electric bed with head linkage mechanism

Abstract

The present invention discloses an electric bed with a head linkage mechanism, which includes: a fixed frame for providing installation and support; a bed board connected to the fixed frame, having a plurality of flippable wooden boards; a driving mechanism fixed to the fixed frame; a sliding frame slidably connected to the fixed frame, which can make the back bed board and the head bed board linked and the head bed board delayed to lift the head bed board. The head linkage mechanism is respectively connected to the sliding frame, the back bed board and the head bed board. The head linkage mechanism includes a connecting piece rotatably connected to the sliding frame, and a delayed transmission assembly for delaying the lifting of the head bed board. One end of the delayed transmission assembly is rotatably connected to the connecting piece, and the other end is rotatably connected to the head bed board or rotatably connected to the head fixing seat fixed on the head bed board. The present invention can realize the linkage function of the back board and the head board of the electric bed, and the head bed board can be delayed to start, so as to alleviate the discomfort of the head caused when the back is raised.

Description

Technical Field

[0001] The invention relates to an electric bed, in particular to an electric bed with a head linkage mechanism, which can realize the linkage between a back plate and a head plate. Background Art

[0002] With the development of electric bed technology, people's demand for electric beds is increasing. The functions of electric beds are also constantly being improved and developed. The present invention relates to a head linkage mechanism, which realizes the linkage between the back wooden board and the head wooden board. The back board supports the back of the human body, and the head board supports the head of the human body. When watching TV or reading, the back and head of the human body need to form a certain angle to achieve the best body posture.

[0003] The back bed board and the head bed board of a traditional electric bed are a whole board. The lying position of the head cannot be changed during use, and the user experience needs to be improved. In order to improve the comfort of the head during the lifting of the electric bed, some people have begun to develop electric beds with head bed boards and back bed boards. For example, the invention patent with Chinese patent number 201610080347.0 discloses an intelligent remote-controlled electric bed; it includes a head bed board and a back bed board, as well as a head motor and a back motor, and the lifting and lowering of the bed boards are controlled by the motors respectively. However, this method is not only complex in structure, but also greatly increases the cost of the electric bed.

[0004] There are two main types of electric beds with linkage functions on the market: 1) the head board moves first with the back board, and after the head board moves to the end position, the back board starts to move; 2) the head board and the back board start to move together, which results in the back board being at a small angle when the person is lying down, and the head is lifted up first, which can cause discomfort to the head. Summary of the invention

[0005] In order to solve the deficiencies and problems existing in the prior art, the present invention provides an electric bed with a head linkage mechanism. By arranging a head linkage mechanism on the bed board, the linkage between the back bed board and the head bed board is realized, which greatly improves the stability and comfort of the electric bed during the lifting process.

[0006] The objective of the present invention is achieved through the following technical solution: an electric bed with a head linkage mechanism, which includes: a fixed frame for providing installation and support; a bed board connected to the fixed frame, having a plurality of flippable wooden boards; a sliding frame slidably connected to the fixed frame; a driving mechanism fixed to the fixed frame; and a head linkage mechanism that can link the back bed board with the head bed board, which is respectively connected to the sliding frame, the back bed board and the head bed board.

[0007] Furthermore, the head linkage mechanism includes a connecting piece rotatably connected to the sliding frame, and a delay transmission assembly for delaying the lifting of the head bed board, one end of the delay transmission assembly is rotatably connected to the connecting piece, and the other end is rotatably connected to the head bed board or to a head fixing seat fixed on the head bed board.

[0008] Furthermore, the structure in which the head linkage mechanism is connected to the sliding frame or the back bed board, the delayed transmission component or the head fixing seat has a slide groove, in which a sliding shaft is arranged. The sliding shaft can slide along the sliding shaft to delay the lifting time of the head bed board, so that the head bed board can be lifted after the back bed board is lifted for a period of time, thereby improving the comfort of the electric bed during the lifting process of the bed board.

[0009] Furthermore, the head linkage mechanism includes: a fixed seat, a sliding connecting rod, a transmission connecting rod, and a connecting piece with a sliding groove, one end of the connecting piece with the sliding groove is rotatably connected to the sliding frame, and the other end is connected to the sliding connecting rod through a sliding shaft, one end of the sliding connecting rod is hinged to the transmission connecting rod, and the other end of the transmission connecting rod is fixed on the head fixed seat.

[0010] Furthermore, the connecting piece with a slide groove has a slide groove which is a long groove or a waist hole, a sliding shaft is arranged in the long groove, a sliding connecting rod is axially connected to the sliding shaft, the other end of the sliding connecting rod is rotatably connected to the transmission connecting rod, and the other end of the transmission connecting rod is rotatably connected to a fixed seat on the head bed board.

[0011] Furthermore, the sliding connecting rod and the transmission connecting rod are rotationally connected via a shaft, and the shaft is fixed on the back fixing seat.

[0012] Furthermore, the bed board includes a head board, a back board, a waist board and a foot board that are hinged to each other, wherein a connecting rod is movably connected to the back board, and the other end of the connecting rod is hinged to a fixed frame. Preferably, the connecting rod is symmetrically arranged on the back board.

[0013] Furthermore, the sliding frame includes a sliding cross bar, a pulley and a support seat, the sliding cross bar and the pulley are connected to the support seat, the pulley is slidably connected to the fixed frame, and both ends of the sliding cross bar are connected to the support seat, so that the sliding cross bar can move within the range of the fixed frame.

[0014] Furthermore, the front end of the driving push rod of the driver can be rotatably connected to the support frame and connected to a transmission push rod, one end of the transmission push rod is fixed to the back bed board, preferably, the support seat is a triangular support frame, and the support frame and the transmission push rod are connected as a whole.

[0015] When sliding, the driving push rod applies force to make the transmission push rod drive the back bed board to lift, and the lifting of the back bed board drives the head bed board to lift. The connecting rod can support the back bed board well. The lifting of the back bed board makes the sliding shaft start to slide along one end of the slide groove on the connecting part with the slide groove. When sliding along the sliding shaft to the other end of the slide groove, the sliding connecting rod drives the transmission connecting rod to rotate. The rotation of the transmission connecting rod drives the fixed seat sleeve connected to the axis to rotate, so that the head bed board is lifted.

[0016] Optionally, the slide groove may also be arranged on a component connected to the back bed board, as long as the delayed lifting of the head bed board relative to the back bed board can be achieved.

[0017] The present invention adopts a slide groove and a delay component design to realize the linkage function between the back board and the head board of the electric bed. The head board can be started with a delay to alleviate the discomfort of the head caused when the back is raised, and to make the head board have better strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following is a brief introduction to the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without making any creative work.

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0020] Figure 2 for Figure 1 A partial enlarged schematic diagram of the head linkage mechanism;

[0021] Figure 3 It is a schematic diagram of an embodiment of the initial state of the head linkage mechanism of the present invention;

[0022] Figure 4 It is a schematic diagram of an embodiment of the sliding state of the head linkage mechanism of the present invention;

[0023] Figure 5 It is a schematic diagram of an embodiment of the sliding shaft of the present invention sliding to the end of the sliding groove;

[0024] Figure 6 It is a schematic diagram of the state of the back bed board and the head bed board after the sliding shaft of the present invention slides to the end of the sliding groove;

[0025] Figure 7 This is a schematic diagram of the sliding termination state of the head linkage mechanism described in the first embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of a sliding termination state of an embodiment of the head linkage mechanism of the present invention;

[0027] Fig. 9 This is a schematic diagram of a sliding termination state of an embodiment of the head linkage mechanism of the present invention;

[0028] Fig.10 This is a schematic diagram of the sliding termination state of an embodiment of the head linkage mechanism of the present invention.

[0029] In the figure: 1-fixed frame, 2-sliding frame, 3-head linkage mechanism, 4-bed board, 5-connecting rod, 6-driving mechanism, 10-groove, 21-support seat, 22-pulley, 31-connecting piece, 32-sliding connecting rod, 33-transmission connecting rod, 34-back fixing seat, 35-head fixing seat, 36-sliding shaft, 41-head bed board, 42-back bed board, 61-drive push rod, 62-transmission push rod, 310-slide groove, 320-shaft, 610-support frame. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention are described clearly and in detail below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0031] It should be noted that the orientations or positional relationships indicated by terms such as “one end”, “the other end”, “end”, “both sides”, and “inner end” are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the components or parts referred to must have a specific orientation or be constructed in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0032] It should also be noted that, unless otherwise clearly specified and limited, the term "rotational connection" should be understood in a broad sense. For example, it can be a hinged connection or a 360-degree rotational connection, such as an axle connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] like Figure 1 , Figure 2 , Figure 5 The illustrated embodiment 1 is an electric bed with a head linkage mechanism, which includes: a fixed frame 1 for providing installation and support; a bed board 4 connected to the fixed frame 1, having a plurality of flippable wooden boards; a sliding frame 2 slidably connected to the fixed frame 1; a driving mechanism 6 fixed to the fixed frame 1; a head linkage mechanism 3 that can enable the back bed board 42 to be linked with the head bed board 41 and delay the lifting of the head bed board 41, and the head linkage mechanism 3 is respectively connected to the sliding frame 2, the back bed board 42 and the head bed board 41.

[0034] Furthermore, the fixed frame is formed by splicing a plurality of transverse and longitudinal frames, preferably made of metal pipes, and grooves 10 for sliding pulleys 22 on the sliding frame 2 are formed on both sides of the fixed frame 1 .

[0035] Furthermore, the sliding frame includes a sliding cross bar, a pulley 22 and a support seat 21. The sliding cross bar and the pulley are connected to the support seat 21. The pulley is connected to the groove of the fixed frame and is slidably connected to the fixed frame. Both ends of the sliding cross bar are connected to the support seat so that the sliding cross bar can move within the range of the fixed frame.

[0036] Furthermore, the sliding frame 2 slides relatively in the horizontal direction along the groove 10 on the fixed frame 1 via the pulley 22 .

[0037] Furthermore, the head linkage mechanism includes a connecting member 31 rotatably connected to the sliding frame 2, and a delayed transmission assembly for delaying the lifting of the head bed board 41, wherein the delayed transmission assembly includes a sliding link 32 and a transmission link 33, one end of the sliding link 32 is rotatably connected to the connecting member 31, the other end of the sliding link 32 is rotatably connected to the transmission link 33 and is connected to the back fixing seat 34 on the back bed board 42 through an axis, the other end of the transmission link 33 is rotatably connected to the head fixing seat 35, and optionally, the transmission link 33 can also be rotatably connected to the head bed board 41.

[0038] Furthermore, the structure in which the head linkage mechanism 3 is directly connected to the sliding frame 2 or the back bed board 42 has a slide groove 310 to delay the lifting time of the head bed board, so that the head bed board can be lifted after the back bed board is lifted for a period of time, thereby improving the comfort of the electric bed during the lifting process.

[0039] Furthermore, the connecting member 31 is slidably connected to the delay transmission assembly, so that the delay transmission assembly can delay sliding and lifting the head bed board 41.

[0040] like Figure 2 As shown, the head linkage mechanism includes: a back fixing seat 34, a head fixing seat 35, a sliding link 32, a transmission link 33, and a connecting member 31 with a slide groove. The sliding link 32 and the transmission link 33 form a delay assembly that can delay the lifting time of the head bed board. One end of the connecting member 31 with the slide groove is rotatably connected to the sliding frame 2, and the other end is rotatably connected to the sliding link 32 through a sliding shaft 36. One end of the sliding link 32 is rotatably connected to the transmission link 33, and the other end of the transmission link 33 is rotatably connected to the head fixing seat 35.

[0041] Furthermore, the slide groove 310 on the connecting piece is a long groove or a waist hole, a sliding shaft 36 is arranged in the long groove, a sliding connecting rod 32 is axially connected to the sliding shaft 36, the other end of the sliding connecting rod 32 is rotatably connected to the transmission connecting rod 33, and the other end of the transmission connecting rod 33 is rotatably connected to the head fixing seat 35.

[0042] Furthermore, the sliding connecting rod 32 and the transmission connecting rod 33 are rotatably connected via a shaft 320 , and the shaft 320 is fixed on the back fixing seat 34 .

[0043] Preferably, one end of the transmission link 33 is rotatably connected to the head bed board 41 or to a head fixing seat 35 connected to the head bed board 41 , and the other end is rotatably connected to the sliding link 32 on a back fixing seat 34 on the back bed board 42 .

[0044] Furthermore, the bed board includes a head bed board 41, a back bed board 42, a waist bed board and a foot bed board which are hinged to each other by hinges, wherein a connecting rod 5 is movably connected to the back bed board 42, and the other end of the connecting rod 5 is hinged to the fixed frame 1 of the head. Preferably, the connecting rod 5 is symmetrically arranged between the back bed board 42 and the fixed frame 1 of the head.

[0045] Furthermore, the head bed board and the back bed board may be wooden boards, iron frames, or boards made of other materials.

[0046] like Figure 3 , 4 As shown, the front end of the driving push rod 61 of the driver is rotatably connected to the support frame 610, and the support frame 610 is connected to a transmission push rod 62. One end of the transmission push rod 62 and the support frame 610 are respectively fixed to the back bed board 42. Preferably, the support frame 610 is a triangular support frame, and the support frame 610 and the transmission push rod 62 are connected as a whole, which can improve the stability when lifting the bed board.

[0047] like Figure 8 The embodiment 2 shown is based on the technical solution of embodiment 1.

[0048] Optionally, the head linkage mechanism includes a connecting member 31 rotatably connected to the sliding frame 2, the connecting member 31 is rotatably connected to one end of the delay transmission assembly, and the other end of the delay transmission assembly is connected to the head bed board 41. The delay transmission assembly includes a sliding link 32 and a transmission link 33. A slide groove 310 is provided on one end of the sliding link 32 rotatably connected to the connecting member 31, and a sliding shaft 36 sliding along the slide groove 310 is provided in the slide groove 310. The sliding shaft 36 in the slide groove 310 at one end of the connecting member 31 and the sliding link 32 is rotatably connected, the other end of the sliding link 32 is rotatably connected to the transmission link 33 and is connected to the back fixing seat 34 on the back bed board 42 through an axis, and the other end of the transmission link 33 is rotatably connected to the head fixing seat 35. Optionally, the transmission link 33 can also be rotatably connected to the head bed board 41.

[0049] like Fig. 9 The embodiment 3 shown is based on the technical solution of embodiment 1.

[0050] Optionally, the head linkage mechanism includes a connecting member 31 rotatably connected to the sliding frame 2, the connecting member 31 is rotatably connected to one end of the delay transmission assembly, and the other end of the delay transmission assembly is connected to the head bed board 41. The delay transmission assembly includes a sliding link 32 and a transmission link 33. A slide groove 310 is provided at one end of the transmission link 33 rotatably connected to the sliding link 32. A sliding shaft 36 sliding along the slide groove 310 is provided in the slide groove 310. The sliding shaft 36 is rotatably connected to the sliding link 32. One end of the sliding link 32 is rotatably connected to the transmission link 33 and is connected to the back fixing seat 34 on the back bed board 42 through an axis. The other end of the transmission link 33 is rotatably connected to the head fixing seat 35. Optionally, the transmission link 33 can also be rotatably connected to the head bed board 41.

[0051] like Fig.10 The embodiment 4 shown is based on the technical solution of embodiment 1.

[0052] Optionally, the head linkage mechanism includes a connecting member 31 rotatably connected to the sliding frame 2, and a delayed transmission assembly for delaying the lifting of the head bed board 41, the delayed transmission assembly includes a sliding link 32 and a transmission link 33, one end of the delay transmission assembly is rotatably connected to the connecting member 31, and the other end is rotatably connected to a head fixing seat 35 fixed on the head bed board 41, one end of the sliding link 32 is rotatably connected to the transmission link 33 and is connected to a back fixing seat 34 on the back bed board 42 through an axis, and the other end of the transmission link 33 is rotatably connected to the head fixing seat 35, optionally, the transmission link 33 can also be rotatably connected to the head bed board 41.

[0053] Furthermore, a slide groove 310 is provided at the rotational connection position of the head fixing seat 35 and the transmission connecting rod 33 , and a sliding shaft 36 is provided in the slide groove 310 , and the sliding shaft 36 is rotationally connected to the transmission connecting rod 33 .

[0054] In Examples 1-4, due to the use of components with slide grooves, the head bed board can be raised with a delay when the back bed board is raised, thereby improving the comfort of the head when the electric bed is raised.

[0055] The driving push rod applies force to make the transmission push rod drive the back bed board to lift, and the lifting of the back bed board drives the head bed board to lift. The connecting rod can support the back bed board well. The lifting of the back bed board causes the sliding shaft to start sliding along one end of the slide groove on the connecting piece with the slide groove. When sliding along the sliding shaft to the other end of the slide groove, the sliding connecting rod drives the transmission connecting rod to rotate. The rotation of the transmission connecting rod drives the fixed seat sleeve connected to the axis to rotate, so that the head bed board is lifted.

[0056] Optionally, the slide groove may also be arranged on a component connected to the back bed board, as long as the delayed lifting of the head bed board relative to the back bed board can be achieved.

[0057] Furthermore, in the head linkage mechanism, when the sliding shaft slides from one end of the slide slot to the other end of the slide slot, the back bed board and the head bed board are lifted synchronously, and when sliding to the end of the slide slot, the transmission connecting rod starts to rotate and lift the head bed board.

[0058] Furthermore, at least one stop plate is installed on the back bed board or the head bed board, and both ends of the stop plate extend to the back bed board and the head bed board area respectively, so as to prevent the head bed board from flipping downward.

[0059] Preferably, the stop plate is symmetrically arranged on the back bed board or the head bed board. When one end of the stop plate is installed on the back bed board, the other end supports the head bed board; when one end of the stop plate is installed on the head bed board, the other end extends to the back bed board area to prevent the head bed board from flipping downward.

[0060] In Example 1, Figure 3 , Figure 4 , Figure 5 As shown, in the initial state, the driving push rod is in a non-pushed out state, the connecting member 31 with the slide groove 310 of the head linkage mechanism 3 is in a non-stressed state, and the sliding shaft 36 is at the inner end of the slide groove 310 on the connecting member 31; after the driver is started, the driving push rod 61 starts to push the back bed board 42 to slowly rise through the transmission push rod 62. At this time, the push rod 5 lifts and supports the back bed board 42, and the back bed board 42 drives the sliding connecting rod 32 to slide along the slide groove 310 on the connecting member 31, while the transmission connecting rod 33 is not subjected to thrust and will not drive the head bed board 35 to lift. Before the sliding shaft 36 moves to the other side end of the slide groove 310, the head bed board 41 will be lifted synchronously with the back bed board 42.

[0061] like Figure 5 , Figure 6 As shown, after the sliding shaft 36 slides to the other side end of the slide groove 310, the driving push rod 61 continues to apply force, the transmission push rod 62 continues to push the back bed board 42, the sliding link 32 will be lifted up along with the back bed board 42, and the transmission link 33 rotatably connected to the sliding link 32 will rotate and push the head fixing seat 35 to rotate. The rotation of the head fixing seat 35 causes the head bed board 41 to rotate around the hinge, so that the head bed board is slowly lifted.

[0062] After the sliding shaft 36 reaches the terminal position of the slide slot, the back bed board 42 will first rise to a certain angle, and then the head bed board 41 will move with the back bed board 42. The advantage of this is that when the back bed board 42 is at a relatively small angle, the human body is generally in a lying state and the head does not need to be lifted; but when the human back rises to a certain angle, the human body is in a sitting state, and the head needs to be lifted so that the eyes can look straight ahead.

[0063] Furthermore, when the sliding link 32 rotates until the back bed board 42 is no longer lifted, the transmission link 33 rotatably connected to the sliding link 32 also stops pushing the head bed board 41 to lift.

[0064] like Figure 5 , Figure 7 As shown, after the sliding shaft 36 slides to the other side end of the slide groove 310, the driving push rod 61 continues to apply force, and the transmission push rod 62 continues to push the back bed board 42. At this time, the sliding shaft 36 cannot continue to slide along the slide groove 310, and the sliding connecting rod 32 will push the transmission connecting rod 33 to rotate and lift the back fixing seat 34. When the back bed board 42 cannot be lifted, the head bed board 41 will also stop lifting.

[0065] Based on the above embodiments, the concept of the linkage between the back board and the head board of the present invention is: first, the back board is raised to a certain angle, and then the head board moves with the back board. The advantage of adopting this design is that when the back board is at a relatively small angle, the human body is generally in a lying state and the head does not need to be raised; but when the back of the human body is raised to a certain angle, the human body is in a sitting state, and the head needs to be raised so that the eyes can look straight ahead.

[0066] Based on the concept of the present invention, the slide groove described in the present invention can be set on a connecting piece connected to the sliding frame, can be set on a structure connected to the head bed board, can be set on a delay transmission assembly, and can also be set on a component connected to the back bed board. As long as the sliding shaft can slide from one end to the other end in the slide groove, the back bed board and the head bed board can continue to be lifted after the sliding shaft slides to the end of the slide groove, it will be fine.

[0067] Based on the above-mentioned preferred embodiments of the present invention, a person skilled in the art can make various deformations, replacements or modifications. The position of the slide groove can be changed in many ways, and the composition of the delay component can be changed in many ways as needed, which will not be described in detail here.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electric bed with a head linkage mechanism, comprising: A fixed frame for providing mounting and support; A bed board connected to the fixed frame, having a plurality of flippable wooden boards; A driving mechanism fixed on the fixed frame; characterized in that it also includes: a sliding frame slidably connected to the fixed frame, which can make the back bed board and the head bed board linked and a head linkage mechanism for delaying the lifting of the head bed board, the head linkage mechanism is respectively connected to the sliding frame, the back bed board and the head bed board, the head linkage mechanism includes a connecting piece rotatably connected to the sliding frame, and a delayed transmission assembly for delaying the lifting of the head bed board, one end of the delayed transmission assembly is rotatably connected to the connecting piece, and the other end is rotatably connected to the head bed board or rotatably connected to the head fixing seat fixed on the head bed board, the connecting piece, the delayed transmission assembly or the head fixing seat is provided with a slide groove for delaying the lifting of the head bed board, and a sliding shaft is arranged in the slide groove; The delay transmission assembly includes a sliding link and a transmission link, one end of the sliding link is rotatably connected to the connecting piece, the other end of the sliding link is rotatably connected to the transmission link and connected to the back fixing seat on the back bed board through an axis, and the other end of the transmission link is rotatably connected to the head fixing seat; The connecting piece rotatably connected to the sliding frame is provided with a sliding groove on one end connected to the sliding link, a sliding shaft sliding along the sliding groove is provided in the sliding groove, and the sliding shaft is rotatably connected to the sliding link; or, the sliding link is provided with a sliding groove on one end connected to the connecting piece, a sliding shaft sliding along the sliding groove is provided in the sliding groove, and the sliding shaft is rotatably connected to the connecting piece; or, the transmission link is provided with a sliding groove on one end rotatably connected to the sliding link, a sliding shaft sliding along the sliding groove is provided in the sliding groove, and the sliding shaft is rotatably connected to the sliding link; or, the head fixing seat is provided with a sliding groove at the connection with the transmission link, a sliding shaft sliding along the sliding groove is provided in the sliding groove, and the sliding shaft is rotatably connected to the transmission link; The bed board comprises a head bed board and a back bed board which are hinged to each other.

2. The electric bed with a head linkage mechanism according to claim 1, characterized in that: When the sliding shaft slides from one end of the slide slot to the other end of the slide slot, the back bed board and the head bed board are lifted synchronously. When sliding to the end of the slide slot, the transmission connecting rod starts to rotate and lift the head bed board.

3. The electric bed with a head linkage mechanism according to claim 2, characterized in that: The slide groove is a long groove or a waist hole.

4. The electric bed with a head linkage mechanism according to claim 3, characterized in that: The head linkage mechanism also includes: a back fixing seat and a head fixing seat, the sliding connecting rod and the transmission connecting rod are rotatably connected through an axis and the axis is fixed on the back mounting seat, and one end of the transmission connecting rod is fixed on the head fixing seat.

5. An electric bed with a head linkage mechanism according to any one of claims 3 to 4, characterized in that: The sliding frame comprises a sliding cross bar, a pulley and a supporting seat. The supporting seat is connected with the sliding cross bar and the pulley. The pulley is slidably connected to the fixed frame. Both ends of the sliding cross bar are connected to the supporting seat.

6. The electric bed with a head linkage mechanism according to claim 5, characterized in that: The fixed frame has a groove on which the pulley on the sliding frame slides.

7. The electric bed with a head linkage mechanism according to claim 5, characterized in that: At least one stopper is installed on the back bed board or the head bed board to prevent the head bed board from turning down, and both ends of the stopper extend to the back bed board and the head bed board area respectively.

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