Linkage mechanism and nursing bed containing the same

Abstract

The present invention discloses a linkage mechanism and a nursing bed including the same. The linkage mechanism includes a first flip unit and a second flip unit. The first flip unit and the second flip unit are relatively flipped. The linkage mechanism also includes a linkage assembly. The linkage assembly has a first connecting rod and a second connecting rod. The first connecting rod and the second connecting rod are connected to the first flip unit and the second flip unit respectively. The first connecting rod and the second connecting rod can switch the connection state, so that the second connecting rod moves with the first connecting rod, or the second connecting rod does not move with the first connecting rod. The linkage mechanism of the present invention can realize two control modes of flipping the first flip unit and the second flip unit together or flipping the first flip unit alone by changing the connection state of the first connecting rod and the second connecting rod. It is not only simple in structure, but also reduces production costs, and increases the selectivity of the use function of the nursing bed and the user's experience.

Description

Technical Field

[0001] The invention relates to a linkage mechanism and a nursing bed comprising the linkage mechanism. Background Art

[0002] The elderly who are bedridden for a long time and cannot take care of themselves, the paralyzed, or patients who cannot move their bodies due to medical needs, cannot take care of themselves and rely entirely on others to serve them. Their backs are in contact with the bedding for a long time, which is easy to cause bedsores. This phenomenon is particularly prominent in the hot summer. Bedsores are formed because the center of gravity of the human body has not shifted, and gravity is concentrated at one point. The local tissues of the human body are under heavy pressure for a long time, and blood circulation is impaired, mainly in the sacrum and hip bones of the human body. If they are not properly cared for, ulcers and bedsores will soon form. The best way to reduce bedsores is to turn the patient left and right frequently, or to change from a lying position to a sitting position. However, turning a patient who cannot take care of himself usually requires the help of two adults, which puts a considerable burden on hospital nursing staff or family members.

[0003] There is a nursing bed on the market now, which can lift up the back and leg bed boards, so as to lift up the back or leg body of the patient lying in bed, thereby avoiding bedsores and facilitating the patient to eat or defecate, etc. However, the lifting and lowering of the back and leg bed boards of the existing nursing beds are driven by separate driving mechanisms, which is costly. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned defects in the prior art and to provide a linkage mechanism and a nursing bed comprising the same.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] A linkage mechanism, comprising a first flip unit and a second flip unit, wherein the first flip unit and the second flip unit are flipped relative to each other, and the linkage mechanism further comprises a linkage assembly, wherein the linkage assembly comprises a first connecting rod and a second connecting rod, and the first connecting rod and the second connecting rod are connected to the first flip unit and the second flip unit respectively;

[0007] The first connecting rod and the second connecting rod can switch the connection state, so that the second connecting rod moves together with the first connecting rod, or the second connecting rod does not move together with the first connecting rod.

[0008] In this solution, by adopting the above-mentioned structural form, by changing the connection state of the first connecting rod and the second connecting rod, two control modes can be realized, namely, the first flip unit and the second flip unit flip together or the first flip unit flips alone. This not only simplifies the structure but also reduces the production cost.

[0009] Preferably, the linkage mechanism further comprises a locking member, and the locking member is used to switch the first connecting rod and the second connecting rod between a connected state and a non-connected state;

[0010] When the first connecting rod and the second connecting rod are in a connected state and the first flip unit flips, the first connecting rod drives the second connecting rod to move in the direction in which the first connecting rod moves, and the second connecting rod drives the second flip unit to flip in the flip direction opposite to the flip direction of the first flip unit;

[0011] When the first link and the second link are in a non-connected state and the first flip unit flips, the second link does not move.

[0012] In this solution, the above-mentioned structural form is adopted, and the connection state of the first connecting rod and the second connecting rod of the linkage assembly is changed by the locking member, which has a simple structure and is easy to control.

[0013] Preferably, the linkage mechanism further includes a first rotating shaft and a first connecting member, wherein the first rotating shaft is disposed below the first flip unit, one end of the first connecting member is fixed on the first rotating shaft, and the other end of the first connecting member is slidably disposed on the first flip unit;

[0014] The first connecting rod is connected to the first rotating shaft, and the first rotating shaft is used to drive the first flipping unit to flip.

[0015] In this solution, the above-mentioned structural form is adopted, and the first turning unit is driven to turn over by the rotation of the first rotating shaft, and the structure is simple.

[0016] Preferably, the linkage mechanism further includes a second rotating shaft and a second connecting member, wherein the second rotating shaft is disposed below the second flip unit, one end of the second connecting member is fixed on the second rotating shaft, and the other end of the second connecting member is slidably disposed on the second flip unit;

[0017] The second connecting rod is connected to the second rotating shaft, and the second rotating shaft is used to drive the second flipping unit to flip.

[0018] In this solution, the above-mentioned structural form is adopted, and the second flip unit is flipped by the rotation of the second rotating shaft. The second rotating shaft is connected to the first rotating shaft through a linkage component and the rotation of the first rotating shaft drives the rotation of the second rotating shaft. The structure is simple.

[0019] Preferably, the linkage mechanism further comprises a third connecting member, one end of the third connecting member is fixed on the first rotating shaft, and the other end of the third connecting member is hinged to the first connecting rod;

[0020] Wherein, when the first rotating shaft rotates along a first direction, the first connecting rod moves in a direction away from the second rotating shaft;

[0021] When the first rotating shaft rotates along the second direction, the first connecting rod moves toward a direction approaching the second rotating shaft.

[0022] Preferably, the linkage mechanism further comprises a fourth connecting member, one end of which is fixed to the second rotating shaft, and the other end of which is hinged to the second connecting rod;

[0023] Wherein, when the first rotating shaft rotates along the first direction, the first connecting rod moves in a direction away from the second rotating shaft, and can make the second rotating shaft rotate along the first direction;

[0024] When the first rotating shaft rotates along the second direction, the first connecting rod moves toward a direction close to the second rotating shaft, and can make the second rotating shaft rotate along the second direction.

[0025] Preferably, the linkage mechanism further includes a driving unit, and the driving unit is used to drive the first rotating shaft to rotate.

[0026] In this solution, the above-mentioned structural form is adopted, and the first flipping unit can be flipped by driving the first rotating shaft to rotate through the driving unit.

[0027] Preferably, the locking member comprises a locking shaft, the first connecting rod is slidably sleeved in the second connecting rod, the second connecting rod is provided with the locking member, and the first connecting rod is provided with a locking groove corresponding to the locking member;

[0028] When the lock shaft is located in the lock groove, the first connecting rod and the second connecting rod are in a connected state;

[0029] When the lock shaft is located outside the lock groove, the first connecting rod and the second connecting rod are in a non-connected state, and the first connecting rod and the second connecting rod slide relative to each other.

[0030] In the present solution, the above-mentioned structural form is adopted. When the lock shaft is engaged with the lock groove, the first connecting rod and the second connecting rod are connected, and the first flipping unit and the second flipping unit flip at the same time. When the lock shaft and the lock groove are separated, the first connecting rod and the second connecting rod are not connected, and only the first flipping unit flips. The second flipping unit is not driven by the second connecting rod and does not flip.

[0031] Preferably, there are a plurality of locking grooves, and the plurality of locking grooves are arranged at intervals along the length direction of the first connecting rod.

[0032] In this solution, the above-mentioned structural form is adopted, and the movement stroke of the second connecting rod is changed by engaging the lock shaft in different lock grooves, thereby changing the rotation angle of the second rotating shaft, so that the second flip unit can flip to different angles.

[0033] Preferably, the locking member further comprises an operating handle, and the operating handle is used to drive the lock shaft to enter or escape from the lock slot.

[0034] In this solution, the above-mentioned structural form is adopted, and the patient can adjust the flipping position or flipping angle by himself on the bed through the operating handle.

[0035] Preferably, the linkage mechanism further comprises a mounting frame, and the first flip unit and the second flip unit are respectively hinged on the mounting frame.

[0036] Preferably, the linkage mechanism also includes a third flip unit, which is located on a side of the second flip unit away from the first flip unit, a side of the third flip unit close to the second flip unit is hinged to the second flip unit, and a side of the third flip unit away from the second flip unit is hinged to a sliding member on the mounting frame, and the sliding member can slide on the mounting frame.

[0037] In this solution, the above-mentioned structural form is adopted, and the flipping of the second flip unit drives the flipping of the third flip unit, so that the two flip plates of the second flip unit and the third flip unit can form an angle that conforms to the bending of human legs.

[0038] A nursing bed comprises the linkage mechanism as described above.

[0039] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0040] The positive progressive effect of the present invention is that the linkage mechanism of the present invention can realize two control modes, namely, the first flip unit and the second flip unit flip together or the first flip unit flips alone, by changing the connection state of the first connecting rod and the second connecting rod. It not only has a simple structure, but also reduces production costs, and increases the selectivity of the use functions of the nursing bed and the user's experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of the linkage mechanism in a preferred embodiment of the present invention.

[0042] Figure 2 It is an enlarged view of the local structure of the linkage mechanism in a preferred embodiment of the present invention.

[0043] Figure 3It is a schematic diagram of the structure of the linkage component in a preferred embodiment of the present invention.

[0044] Figure 4 It is a schematic diagram of the linkage state of the linkage mechanism in a preferred embodiment of the present invention.

[0045] Figure 5 for Figure 4 A magnified view of the structure in the middle.

[0046] Figure 6 It is a structural schematic diagram of the locked state of the linkage assembly in a preferred embodiment of the present invention.

[0047] Figure 7 Schematic diagram of the non-linkage state of the linkage mechanism in a preferred embodiment of the present invention.

[0048] Figure 8 for Figure 7 Enlarged view of the structure at point B in the middle.

[0049] Description of reference numerals:

[0050] The first flip unit 1

[0051] Second flip unit 2

[0052] Mounting bracket 3

[0053] The third turning unit 4

[0054] First axis 5

[0055] Second shaft 6

[0056] First connecting rod 7

[0057] Lock slot 701

[0058] Chute 702

[0059] Second connecting rod 8

[0060] Opening 801

[0061] Guide shaft 802

[0062] Locking member 9

[0063] Lock shaft 901

[0064] Rotating part 902

[0065] Drive unit 10

[0066] Operating handle 11

[0067] The first connecting member 12

[0068] The second connecting member 13

[0069] The third connecting member 14

[0070] Fourth connecting member 15

[0071] Fifth connecting member 16 DETAILED DESCRIPTION

[0072] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the following examples.

[0073] like Figure 1-8 As shown, a linkage mechanism of the present embodiment includes a first flip unit 1, a second flip unit 2, and a mounting frame 3. The first flip unit 1 and the second flip unit 2 are respectively hinged on the mounting frame 3. The first flip unit 1 and the second flip unit 2 are relatively flipped. The linkage mechanism also includes a linkage assembly and a locking member 9. The linkage assembly has a first connecting rod 7 and a second connecting rod 8. The first connecting rod 7 and the second connecting rod 8 are respectively connected to the first flip unit 1 and the second flip unit 2. The locking member 9 is used to switch the first connecting rod 7 and the second connecting rod 8 between a connected state and a non-connected state.

[0074] like Figure 4-6 As shown, when the first link 7 and the second link 8 are in a connected state and the first flip unit 1 flips, the first link 7 drives the second link 8 to move in the direction of the first link 7, and the second link 8 drives the second flip unit 2 to flip in the flip direction opposite to the first flip unit 1.

[0075] like Figure 7-8 As shown, when the first connecting rod 7 and the second connecting rod 8 are in a non-connected state and the first flip unit 1 flips, the second connecting rod 8 does not move, and the second flip unit 2 does not flip without the second connecting rod 8 driving it.

[0076] The linkage mechanism changes the connection state of the first connecting rod 7 and the second connecting rod 8 of the linkage assembly through the locking member 9. Only one driving mechanism is needed to realize two control modes: the first flip unit 1 and the second flip unit 2 flip together or the first flip unit 1 flips alone. This not only has a simple structure but also reduces production costs.

[0077] In this embodiment, if Figure 1 and Figure 2As shown, the linkage mechanism also includes a first rotating shaft 5, a second rotating shaft 6, a first connecting member 12 and a second connecting member 13. The first rotating shaft 5 and the second rotating shaft 6 are respectively arranged below the first flip unit 1 and the second flip unit 2. One end of the first connecting member 12 is fixed on the first rotating shaft 5, and the other end of the first connecting member 12 is slidably arranged on the first flip unit 1. One end of the second connecting member 13 is fixed on the second rotating shaft 6, and the other end of the second connecting member 13 is slidably arranged on the second flip unit 2. The first connecting rod 7 and the second connecting rod 8 are respectively connected to the first rotating shaft 5 and the second rotating shaft 6. The first rotating shaft 5 and the second rotating shaft 6 are respectively used to drive the first flip unit 1 and the second flip unit 2 to flip.

[0078] With the above-mentioned structural form, the first flip unit 1 and the second flip unit 2 are respectively driven to flip by the rotation of the first rotating shaft 5 and the second rotating shaft 6. The second rotating shaft 6 is connected to the first rotating shaft 5 through a linkage assembly and the rotation of the first rotating shaft 5 drives the rotation of the second rotating shaft 6. The structure is simple.

[0079] Specifically, since one end of the first connecting member 12 is fixed on the first rotating shaft 5 and the other end is slidably provided on the first flip unit 1, when the first rotating shaft 5 rotates, the end of the first connecting member 12 slidably provided on the first flip unit 1 slides on the first flip unit 1 from the side away from the hinge end to the side close to the hinge end, so that the first flip unit 1 flips around one side of the hinge end; similarly, the second flip unit 2 is also the same, which will not be repeated here.

[0080] In other embodiments, the end of the first connecting member 12 that contacts the first flip unit 1 may also be in a rolling form. When the first rotating shaft 5 rotates, the roller at the end of the first connecting member 12 that contacts the first flip unit 1 rolls on the first flip unit 1 from the side away from the hinge end to the side close to the hinge end, so that the first flip unit 1 flips around the hinge end. Similarly, the second flip unit 2 is also the same, which will not be repeated here.

[0081] like Figure 1 and Figure 2 As shown, the linkage mechanism also includes a third connecting member 14 and a fourth connecting member 15, one end of the third connecting member 14 is fixed on the first rotating shaft 5, and the other end of the third connecting member 14 is hinged to the first connecting rod 7; one end of the fourth connecting member 15 is fixed on the second rotating shaft 6, and the other end of the fourth connecting member 15 is hinged to the second connecting rod 8; wherein, when the first rotating shaft 5 rotates along the first direction, the first connecting rod 7 moves in a direction away from the second rotating shaft 6, and the second rotating shaft 6 can be rotated along the first direction; when the first rotating shaft 5 rotates along the second direction, the first connecting rod 7 moves in a direction close to the second rotating shaft 6, and the second rotating shaft 6 can be rotated along the second direction.

[0082] See Figure 1 and Figure 2, since one end of the third connecting member 14 is fixed on the first rotating shaft 5 and the other end extends toward the bottom of the first rotating shaft 5, and one end of the fourth connecting member 15 is fixed on the second rotating shaft 6 and the other end also extends toward the bottom of the second rotating shaft 6, when the first rotating shaft 5 rotates clockwise, the first flip unit 1 flips clockwise, the first connecting rod 7 moves to the left, thereby driving the second connecting rod 8 to move to the left, so that the second rotating shaft 6 also rotates clockwise, and since the hinge of the second flip unit 2 is arranged opposite to the hinge of the first flip unit 1, the second flip unit 2 flips counterclockwise under the drive of the second rotating shaft 6. When the first rotating shaft 5 rotates counterclockwise, the first flip unit 1 flips counterclockwise to reset, and at this time, the first connecting rod 7 moves to the right, thereby driving the second connecting rod 8 to move to the right, so that the second rotating shaft 6 also rotates counterclockwise, and at this time, the second flip unit 2 flips clockwise under the drive of the second rotating shaft 6.

[0083] The above description is the action principle when the first connecting rod 7 and the second connecting rod 8 are in a connected state. When the first connecting rod 7 and the second connecting rod 8 are not connected, in the above action, only the first flip unit 1 flips, and the second flip unit 2 does not flip.

[0084] Of course, the following operation can also be performed: initially, the first connecting rod 7 and the second connecting rod 8 are connected to drive the first flip unit 1 and the second flip unit 2 to flip at the same time; after the first flip unit 1 and the second flip unit 2 are flipped, a limiting mechanism is used to limit the rotation of the second rotating shaft 6 or limit the flipping of the second flip unit 2; the locking member 9 is controlled by the operating handle 11 to separate the first connecting rod 7 and the second connecting rod 8; at this time, the first flip unit 1 is driven to flip and reset, so that the flipped state of the second flip unit 2 can be maintained.

[0085] The linkage mechanism further includes a driving unit 10, and the driving unit 10 is used to drive the first rotating shaft 5 to rotate. The first rotating shaft 5 driven by the driving unit 10 can cause the first flipping unit 1 to flip.

[0086] In this embodiment, if Figure 1 and Figure 2 As shown, the drive unit 10 is a linear motor, and the telescopic end of the linear motor is connected to the first rotating shaft 5 through the fifth connecting member 16, wherein the fifth connecting member 16 is arranged parallel to the third connecting member 14, and one end of the fifth connecting member 16 is fixed on the first rotating shaft 5, and the other end is hinged to the telescopic end of the linear motor.

[0087] In other embodiments, the drive unit 10 may also be a pneumatic or hydraulic telescopic mechanism or other types of telescopic mechanisms; the drive unit 10 may also be a stepper motor, and the output end of the motor directly drives the first rotating shaft 5 through a coupling.

[0088] In this embodiment, the locking member 9 includes a locking shaft 901, the first connecting rod 7 is slidably sleeved in the second connecting rod 8, the second connecting rod 8 is provided with the locking member 9, and the first connecting rod 7 is provided with a locking groove 701 corresponding to the locking member 9; when the locking shaft 901 is located in the locking groove 701, the first connecting rod 7 and the second connecting rod 8 are in a connected state; when the locking shaft 901 is located outside the locking groove 701, the first connecting rod 7 and the second connecting rod 8 are in a non-connected state, and the first connecting rod 7 and the second connecting rod 8 slide relative to each other. That is, when the locking shaft 901 is engaged with the locking groove 701, the first connecting rod 7 and the second connecting rod 8 are connected, and the first flip unit 1 and the second flip unit 2 flip at the same time; when the locking shaft 901 is separated from the locking groove 701, the first connecting rod 7 and the second connecting rod 8 are not connected, and only the first flip unit 1 flips, and the second flip unit 2 is not driven by the second connecting rod 8 and does not flip.

[0089] There are multiple locking grooves 701, which are spaced apart along the length direction of the first connecting rod 7. By engaging the locking shaft 901 in different locking grooves 701, the movement stroke of the second connecting rod 8 is changed, and then the rotation angle of the second rotating shaft 6 is changed, so that the second flip unit 2 is flipped at different angles.

[0090] Specifically, see Figure 3 , Figure 5 , Figure 6 and Figure 8 As shown, the first connecting rod 7 can slide in the second connecting rod 8. The side of the first connecting rod 7 has a sliding groove 702 in the length direction. The second connecting rod 8 is provided with a guide shaft 802. The sliding groove 702 cooperates with the guide shaft 802 to enable the first connecting rod 7 to slide in the second connecting rod 8.

[0091] A locking groove 701 is provided on the upper end surface of the first connecting rod 7, and an opening 801 is opened on the upper end surface of the second connecting rod 8. The locking member 9 includes a rotating part 902 and a locking shaft 901. The rotating part 902 is hinged on the second connecting rod 8. The rotation of the rotating part 902 drives the locking shaft 901 to move. The locking shaft 901 can pass through the opening 801 of the second connecting rod 8 and enter the locking groove 701, thereby realizing the linkage between the first connecting rod 7 and the second connecting rod 8.

[0092] The locking groove 701 has a certain length, so that the first connecting rod 7 moves a certain distance before the second connecting rod 8 moves, thereby ensuring that the first flip unit 1 has a larger flip angle than the second flip unit 2 .

[0093] The locking member 9 further includes an operating handle 11, which is used to drive the locking shaft 901 to enter or leave the locking groove 701. The operating handle 11 facilitates the patient to adjust the flipping position or flipping angle on the bed. In this embodiment, the connecting rod of the operating handle 11 and the locking shaft 901 are an integrated structure.

[0094] like Figure 1 , Figure 4and Figure 7 As shown, in this embodiment, the linkage mechanism further includes a third flip unit 4, which is located at a side of the second flip unit 2 away from the first flip unit 1, and a side of the third flip unit 4 close to the second flip unit 2 is hinged to the second flip unit 2, and a side of the third flip unit 4 away from the second flip unit 2 is hinged to a sliding member on the mounting frame 3, and the sliding member can slide on the mounting frame 3. The flipping of the second flip unit 2 drives the flipping of the third flip unit 4, so that the two flip plates of the second flip unit 2 and the third flip unit 4 can form an angle that conforms to the bending of the human leg.

[0095] The present invention also discloses a nursing bed, which comprises the linkage mechanism as described above, thereby increasing the selectivity of the use functions of the nursing bed and the user's experience.

[0096] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A linkage mechanism, comprising a first flip unit and a second flip unit, wherein the first flip unit and the second flip unit are arranged to flip relative to each other, characterized in that: The linkage mechanism further includes a linkage assembly, wherein the linkage assembly includes a first connecting rod and a second connecting rod, wherein the first connecting rod and the second connecting rod are respectively connected to the first flip unit and the second flip unit; The first connecting rod and the second connecting rod can switch the connection state, so that the second connecting rod moves with the first connecting rod, or the second connecting rod does not move with the first connecting rod; The linkage mechanism further includes a locking member, which is used to switch the first connecting rod and the second connecting rod between a connected state and a non-connected state; When the first connecting rod and the second connecting rod are in a connected state and the first flip unit flips, the first connecting rod drives the second connecting rod to move in the direction in which the first connecting rod moves, and the second connecting rod drives the second flip unit to flip in the flip direction opposite to the flip direction of the first flip unit; When the first link and the second link are in a non-connected state and the first flip unit flips, the second link does not move.

2. The linkage mechanism according to claim 1, characterized in that: The linkage mechanism further includes a first rotating shaft and a first connecting member, wherein the first rotating shaft is disposed below the first flip unit, one end of the first connecting member is fixed on the first rotating shaft, and the other end of the first connecting member is slidably disposed on the first flip unit; The first connecting rod is connected to the first rotating shaft, and the first rotating shaft is used to drive the first flipping unit to flip.

3. The linkage mechanism according to claim 2, characterized in that: The linkage mechanism further includes a second rotating shaft and a second connecting member, wherein the second rotating shaft is disposed below the second flip unit, one end of the second connecting member is fixed on the second rotating shaft, and the other end of the second connecting member is slidably disposed on the second flip unit; The second connecting rod is connected to the second rotating shaft, and the second rotating shaft is used to drive the second flipping unit to flip.

4. The linkage mechanism according to claim 3, characterized in that: The linkage mechanism further includes a third connecting member, one end of which is fixed to the first rotating shaft, and the other end of which is hinged to the first connecting rod; Wherein, when the first rotating shaft rotates along a first direction, the first connecting rod moves in a direction away from the second rotating shaft; When the first rotating shaft rotates along the second direction, the first connecting rod moves toward a direction approaching the second rotating shaft.

5. The linkage mechanism according to claim 4, characterized in that: The linkage mechanism further includes a fourth connecting member, one end of which is fixed to the second rotating shaft, and the other end of which is hinged to the second connecting rod; Wherein, when the first rotating shaft rotates along the first direction, the first connecting rod moves in a direction away from the second rotating shaft, and can make the second rotating shaft rotate along the first direction; When the first rotating shaft rotates along the second direction, the first connecting rod moves toward a direction close to the second rotating shaft, and can make the second rotating shaft rotate along the second direction.

6. The linkage mechanism according to claim 2, characterized in that: The linkage mechanism further includes a driving unit, and the driving unit is used to drive the first rotating shaft to rotate.

7. The linkage mechanism according to claim 1, characterized in that: The locking member comprises a locking shaft, the first connecting rod is slidably sleeved in the second connecting rod, the second connecting rod is provided with the locking member, and the first connecting rod is provided with a locking groove corresponding to the locking member; When the lock shaft is located in the lock groove, the first connecting rod and the second connecting rod are in a connected state; When the lock shaft is located outside the lock groove, the first connecting rod and the second connecting rod are in a non-connected state, and the first connecting rod and the second connecting rod slide relative to each other.

8. The linkage mechanism according to claim 7, characterized in that: There are a plurality of locking grooves, and the plurality of locking grooves are arranged at intervals along the length direction of the first connecting rod.

9. The linkage mechanism according to claim 7, characterized in that: The locking member also includes an operating handle, and the operating handle is used to drive the lock shaft to enter or escape from the lock slot.

10. The linkage mechanism according to claim 1, characterized in that: The linkage mechanism further comprises a mounting frame, and the first flip unit and the second flip unit are respectively hinged on the mounting frame.

11. The linkage mechanism according to claim 10, characterized in that: The linkage mechanism also includes a third flip unit, which is located on a side of the second flip unit away from the first flip unit, and a side of the third flip unit close to the second flip unit is hinged to the second flip unit, and a side of the third flip unit away from the second flip unit is hinged to a sliding member on the mounting frame, and the sliding member can slide on the mounting frame.

12. A nursing bed, characterized in that: The nursing bed comprises a linkage mechanism as described in any one of claims 1-11.

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