Back and head linkage mechanism of electric bed

Abstract

The utility model provides a back and head linkage mechanism of an electric bed, which relates to the technical field of electric beds and comprises a bed frame, a back plate and a head plate, a back electric cylinder is hinged on the bed frame, and a back lifting frame is mounted on the bed frame; the telescopic end of the back electric cylinder is provided with a fifth pin shaft, the fifth pin shaft is rotationally connected with a motor mounting piece and a back connecting rod, the top end of the back connecting rod is fixedly connected with a fourth pin shaft, the fourth pin shaft is rotationally sleeved with a transmission lever, the back face of the back plate is fixedly connected with a fixed base, and the fixed base is fixedly connected with a third pin shaft. Through mutual cooperation of all mechanical structures, the head plate can be driven to ascend and descend while the back plate is driven to ascend and descend only through an original back electric cylinder, the head of a person is supported through the head plate, the look-up angle of the person when the person watches a television is reduced, the person feels more comfortable when watching the television, and meanwhile the head plate can be used for driving the head plate to ascend and descend. The high cost of a newly added motor is avoided, and the cost performance of the electric bed is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of electric beds, and in particular to a linkage mechanism between the backrest and headrest of an electric bed. Background Technology

[0002] An electric bed is a type of smart furniture that uses a motor-driven mechanical device to adjust the position of the bed. It mainly consists of a bed frame, motor, control system, and sensors. It has a variety of practical functions, such as the ability to control the height of the bed and adjust the tilt angle of the head and foot of the bed via remote control or smart terminal. It can meet the needs of comfortable posture when reading or watching TV, and also provide assistance when getting up. It is especially suitable for the elderly or patients with limited mobility. In addition, some high-end electric beds are also equipped with intelligent modules such as massage function and sleep monitoring, which can further enhance the sleep experience and health management capabilities. They are widely used in home bedrooms, hospital wards, and other scenarios, combining convenience and comfort, and have become an important manifestation of modern home intelligence.

[0003] In the usage scenarios of electric beds, raising the backrest to watch TV is one of the most common scenarios. Ordinary two-motor electric beds only have two functions: backrest raising and leg raising. Moreover, the backrest raising is usually only about 60°. At this angle, the user's line of sight is diagonally upward, and watching TV at such a large upward angle will lead to poor viewing comfort. A few electric beds with headrest raising function often have an additional motor to directly drive the headrest to rise and fall. However, each additional motor will significantly increase the price of the electric bed, making it less cost-effective and reducing the user experience. Therefore, it is necessary to provide an electric bed backrest and headrest linkage mechanism to solve the above technical problems. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a linkage mechanism between the back and head of an electric bed.

[0005] This utility model provides an electric bed back and head linkage mechanism, including a bed frame, a back panel and a head panel, a back electric cylinder is hinged on the bed frame, and a back lifting frame is installed on the bed frame;

[0006] The telescopic end of the back electric cylinder is provided with a fifth pin. A motor mounting part and a back connecting rod are rotatably connected to the fifth pin. The top of the back connecting rod is fixedly connected to a fourth pin. A transmission lever is rotatably sleeved on the fourth pin. A fixed base is fixedly connected to the back of the back plate. A third pin is fixedly connected to the fixed base. The transmission lever is rotatably sleeved on the outside of the third pin. A second pin is fixedly connected to the top of the transmission lever. A head connecting rod is rotatably sleeved on the outside of the second pin. A head bracket is fixedly connected to the back of the head plate. A first pin is provided between the top of the head connecting rod and the head bracket.

[0007] An arc-shaped guide groove is provided through the fixed base, and the pin extends into the arc-shaped guide groove.

[0008] Preferably, a pin six is ​​provided between the back plate and the head plate, and the back plate is rotatably connected to the head plate through the pin six.

[0009] Preferably, the back lifting frame includes a horizontal column, with two supporting side plates symmetrically fixedly connected to both ends of the horizontal column. A rotating column is provided between the lower part of the supporting side plate and the bed frame. The lower part of the supporting side plate is rotatably connected to the bed frame through the rotating column. The top of the motor mounting component is fixedly sleeved on the middle part of the horizontal column.

[0010] Preferably, a support wheel is rotatably connected to the top of the support side plate, and the wheel wall of the support wheel abuts against the back of the back plate.

[0011] Preferably, the first pin is rotatably connected to the head bracket, and the top end of the head connecting rod is fixedly sleeved on the outside of the first pin.

[0012] Preferably, the fifth pin is fixedly connected to the telescopic end of the back electric cylinder.

[0013] Compared with related technologies, the electric bed backrest and headrest linkage mechanism provided by this utility model has the following beneficial effects:

[0014] 1. This utility model, through the cooperation of various mechanical structures, can drive the back panel and the head panel simultaneously using only the original back electric cylinder. The head panel supports the user's head, reducing the upward viewing angle when watching TV, making it more comfortable. At the same time, it avoids the high cost of adding a new motor, improves the cost-effectiveness of the electric bed, and provides users with a better and more comfortable experience.

[0015] 2. The arc-shaped guide groove provides a predetermined motion trajectory for the fourth pin, restricts the movement path of the transmission lever, ensures linkage accuracy, and improves stability.

[0016] 3. The support wheels make rolling contact with the back of the back plate, which helps to push the back plate up while reducing mechanical wear and improving the smoothness of movement. Attached Figure Description

[0017] Figure 1 A schematic diagram of the linkage mechanism between the backrest and headrest of the electric bed provided by this utility model installed on the electric bed;

[0018] Figure 2 This is a schematic diagram of the initial state of the linkage mechanism between the back and head of the electric bed in this utility model;

[0019] Figure 3This is a schematic diagram of the linkage mechanism between the back and head of the electric bed in this utility model after it has been unfolded.

[0020] Figure 4 This is an overall schematic diagram of the linkage mechanism between the back and head of the electric bed in this utility model, mounted on the bed frame.

[0021] Figure 5 This is a partial schematic diagram of the linkage mechanism between the back and head of the electric bed in this utility model;

[0022] Figure 6 This is a schematic diagram of the head support structure in this utility model;

[0023] Figure 7 This is a schematic diagram of the structure of the fixed base in this utility model;

[0024] Figure 8 This is a schematic diagram of the transmission lever in this utility model;

[0025] Figure 9 This is a schematic diagram of the head connecting rod in this utility model;

[0026] Figure 10 This is a schematic diagram of the back connecting rod in this utility model.

[0027] The following are the labeling elements in the diagram: 1. Motor mounting component; 2. Backrest connecting rod; 3. Transmission lever; 4. Fixed base; 401. Arc-shaped guide groove; 5. Headrest connecting rod; 6. Headrest bracket; 7. Backrest lifting frame; 701. Horizontal column; 702. Support side plate; 703. Rotating column; 704. Support wheel; 8. Bed frame; 9. Backrest electric cylinder; 10. Backrest plate; 11. Headrest plate; 12. Pin 1; 13. Pin 2; 14. Pin 3; 15. Pin 4; 16. Pin 5; 17. Pin 6. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] Example 1

[0030] Please refer to the following: Figures 1 to 10A linkage mechanism between the backrest and headrest of an electric bed includes a bed frame 8, a backrest plate 10, and a headrest plate 11. A backrest lifting frame 7 is mounted on the bed frame 8. A backrest electric cylinder 9 is hinged to the bed frame 8. A pin 16 is provided at the telescopic end of the backrest electric cylinder 9. A motor mounting part 1 and a backrest connecting rod 2 are rotatably connected to the pin 16. A pin 15 is fixedly connected to the top of the backrest connecting rod 2. A transmission lever 3 is rotatably sleeved on the pin 15. The transmission lever 3 is L-shaped. The back of the backrest plate 10 is fixedly connected to... There is a fixed base 4, on which a pin 3 14 is fixedly connected. A transmission lever 3 is rotatably sleeved on the outside of the pin 3 14. A pin 2 13 is fixedly connected to the top of the transmission lever 3. A head connecting rod 5 is rotatably sleeved on the outside of the pin 2 13. A head bracket 6 is fixedly connected to the back of the head plate 11. A pin 1 12 is provided between the top of the head connecting rod 5 and the head bracket 6. An arc-shaped guide groove 401 is provided through the fixed base 4. Pin 4 15 extends into the arc-shaped guide groove 401.

[0031] Furthermore, a pin 17 is provided between the back plate 10 and the head plate 11, and the back plate 10 is rotatably connected to the head plate 11 through the pin 17.

[0032] Furthermore, pin 12 is rotatably connected to head bracket 6, and the top end of head connecting rod 5 is fixedly sleeved on the outside of pin 12.

[0033] Furthermore, pin 516 is fixedly connected to the telescopic end of the back electric cylinder 9.

[0034] In the above, the transmission lever 3 is L-shaped. Its structural design reduces the space occupied by the linkage mechanism, adapts to more bed types, and at the same time increases the ratio of the output lever arm to the input lever arm to enhance the thrust on the head plate 11 and improve the lifting stability.

[0035] In the above, the arc-shaped guide groove 401 on the fixed base 4 provides a motion track for the pin 15, ensuring that each component of the linkage mechanism moves within the predetermined trajectory, reducing deformation caused by external forces, and further improving the stability of the mechanism.

[0036] In the above, when the telescopic end of the back electric cylinder 9 extends, it pushes the motor mounting part 1 and the back connecting rod 2 to move through the fifth pin 16. The back connecting rod 2 moves upward, causing the transmission lever 3 to rotate around the third pin 14. The fourth pin 15 slides along the arc-shaped trajectory in the arc-shaped guide groove 401, restricting the movement path of the transmission lever 3 and ensuring the linkage accuracy.

[0037] In the above, the pin 13 at the top of the transmission lever 3 drives the head connecting rod 5 to rotate around the pin 13. The head connecting rod 5 pushes the head bracket 6 to rotate around the pin 12 through the pin 12. At the same time, the back plate 10 and the head plate 11 rotate relative to each other through the pin 17, so that the two rise synchronously.

[0038] Example 2

[0039] For further details, please refer to [link / reference]. Figures 1 to 10 Based on Embodiment 1, the back lifting frame 7 includes a horizontal column 701. Two supporting side plates 702 are symmetrically fixedly connected to both ends of the horizontal column 701. A rotating column 703 is provided between the lower part of the supporting side plate 702 and the bed frame 8. The lower part of the supporting side plate 702 is rotatably connected to the bed frame 8 through the rotating column 703. The top of the motor mounting component 1 is fixedly sleeved on the middle part of the horizontal column 701.

[0040] Furthermore, a support wheel 704 is rotatably connected to the top of the support side plate 702, and the wheel wall of the support wheel 704 abuts against the back of the back plate 10.

[0041] In the above, when the motor mounting part 1 moves, it drives the horizontal column 701 to move. The horizontal column 701 pushes the support side plate 702 to rotate around the rotating column 703. The support wheel 704 at the top of the support side plate 702 continuously abuts against the back of the back plate 10, assisting in pushing the back plate 10 to rise. At the same time, the mechanical wear is reduced by the rolling contact between the support wheel 704 and the back of the back plate 10.

[0042] The input lever arm of the transmission lever 3 (the distance from the center of pin 4 15 to the center of pin 3 14) is close to the bed board, and the output lever arm (the distance from the center of pin 3 14 to the center of pin 2 13) is far away from the bed board, so that the angle between pin 2 13 and pin 12 and pin 12 and pin 6 17 is close to a right angle, reducing the loss in the thrust conversion process and improving the efficiency and stability of the lifting of the head plate 11.

[0043] The working principle of the electric bed backrest and headrest linkage mechanism provided by this utility model is as follows:

[0044] The extension end of the back electric cylinder 9 pushes the fifth pin 16, causing the motor mounting part 1 and the back connecting rod 2 to rotate along the fifth pin 16. The back connecting rod 2 drives the transmission lever 3 to move, causing the transmission lever 3 to rotate along the third pin 14. At the same time, the fourth pin 15 moves inside the arc-shaped guide groove 401. During the movement of the back electric cylinder 9 and the motor mounting part 1, the motor mounting part 1 drives the horizontal column 701 to move. The horizontal column 701 drives the support side plate 702 to move, causing the support side plate 702 to rotate along the rotating column 703. The movement drives the support wheel 704 to move, which in turn keeps it against the back plate 10 and pushes the back plate 10 to move. The transmission lever 3 drives the head linkage 5 to move, and the head linkage 5 rotates along the second pin 13. The head linkage 5 drives the head bracket 6 to move, and the head bracket 6 rotates along the first pin 12. Simultaneously, the back plate 10 and the head plate 11 rotate relative to each other along the sixth pin 17, thus raising both the back plate 10 and the head plate 11 simultaneously. This eliminates the need for an additional motor, reducing costs while improving the user experience. During operation, the head plate 11 is driven by the electric cylinder 9 at the back, causing it to rise and fall synchronously with the back plate 10, thus achieving linkage. The input force arm pins 15 and 14 of the transmission lever 3 are positioned close to the bed board, while the output force arm pins 14 and 13 are positioned away from the bed board. This structure allows the angle between pins 13 and 12 and pins 12 and 17 to be closer to a right angle, thereby reducing the loss of thrust during the conversion process. The transmission lever 3 is L-shaped, which allows the linkage mechanism to occupy less space and can accommodate more... The bed type allows for a larger ratio of the output lever arm (distance from the center of pin 3 14 to the center of pin 2 13) to the input lever arm (distance from the center of pin 4 15 to the center of pin 3 14) of the transmission lever 3, resulting in a larger thrust on the head plate 11 after conversion, thus making the lifting and lowering of the head plate 11 more stable. An arc-shaped guide groove 401 is provided on the fixed base 4, and pin 4 15 moves in the arc-shaped guide groove 401. Each point on the linkage mechanism can still move within the predetermined track, reducing the deformation of the linkage mechanism when affected by external forces and improving stability.

[0045] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A linkage mechanism between the backrest and headrest of an electric bed, comprising a bed frame (8), a backrest plate (10), and a headrest plate (11), wherein a backrest electric cylinder (9) is hinged to the bed frame (8), characterized in that, The bed frame (8) is equipped with a backrest lifting frame (7); The telescopic end of the back electric cylinder (9) is provided with a fifth pin (16). A motor mounting part (1) and a back connecting rod (2) are rotatably connected to the fifth pin (16). The top end of the back connecting rod (2) is fixedly connected with a fourth pin (15). A transmission lever (3) is rotatably sleeved on the fourth pin (15). A fixed base (4) is fixedly connected to the back of the back plate (10). A third pin (14) is fixedly connected to the fixed base (4). The transmission lever (3) is rotatably sleeved on the outside of the third pin (14). A second pin (13) is fixedly connected to the top end of the transmission lever (3). A head connecting rod (5) is rotatably sleeved on the outside of the second pin (13). A head bracket (6) is fixedly connected to the back of the head plate (11). A first pin (12) is provided between the top end of the head connecting rod (5) and the head bracket (6). An arc-shaped guide groove (401) is provided through the fixed base (4), and the pin (15) extends into the arc-shaped guide groove (401).

2. An electric bed back and head linkage according to claim 1 wherein, A pin six (17) is provided between the back plate (10) and the head plate (11), and the back plate (10) is rotatably connected to the head plate (11) through the pin six (17).

3. An electric bed back and head linkage according to claim 1 wherein, The back lifting frame (7) includes a cross column (701), and two support side plates (702) are symmetrically fixedly connected at both ends of the cross column (701). A rotating column (703) is provided between the lower part of the support side plate (702) and the bed frame (8). The lower part of the support side plate (702) is rotatably connected to the bed frame (8) through the rotating column (703). The top of the motor mounting part (1) is fixedly sleeved on the middle part of the cross column (701).

4. An electric bed back and head linkage according to claim 3 wherein, The top of the support side plate (702) is rotatably connected to a support wheel (704), and the wheel wall of the support wheel (704) abuts against the back of the back plate (10).

5. The back and head linkage mechanism for a power bed of claim 1 wherein, The pin (12) is rotatably connected to the head bracket (6), and the top end of the head connecting rod (5) is fixedly sleeved on the outside of the pin (12).

6. An electric bed back and head linkage according to claim 1 wherein, The fifth pin (16) is fixedly connected to the telescopic end of the back electric cylinder (9).

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