Bedridden patient body weight measuring device

Abstract

This invention discloses a weight measurement device for bedridden patients, relating to the field of weight measurement devices. It provides a weight measurement device capable of lifting a patient from a hospital bed and measuring their weight. The bedridden patient weight measurement device includes a base, a lying board, a movable frame, a support device, a lying board pulling device, and an electronic control device. The movable frame is connected to the base; the support device is connected to the movable frame, and the movable frame can drive the support device to move back and forth. The support device includes support rollers that can be raised and lowered; the lying board pulling device is located behind the support device, and includes a pulling telescopic cylinder and a tension sensing device. The lower end of the pulling telescopic cylinder is hinged to the base, and the tension sensing device is connected to the upper end of the pulling telescopic cylinder; the middle part of the lying board rests on the support rollers, and the rear end of the lying board is hinged to the tension sensing device; the electronic control device can calculate the weight of the patient lying on the lying board based on the measurement value of the tension sensing device.

Description

Technical Field

[0001] This invention relates to the field of weight measurement devices, and more particularly to a weight measurement device for bedridden patients. Background Technology

[0002] Weight is an important vital sign for some hospitalized patients, and treatment plans and medication dosages are often determined based on the patient's weight. A weighing scale is a common device for measuring weight in daily life; a person simply stands on it to measure their weight. However, bedridden patients often find it difficult to get up and stand on a weighing scale, making weight measurement inconvenient.

[0003] A search revealed that Chinese patent application number 202021406379.3 discloses a bed for monitoring the weight of bedridden patients, comprising a bed board, a headboard, and a footboard. The bed is equipped with a microcontroller module, a weighing sensor module, an LCD display module, and a power supply module that provides power to the above modules. The weighing sensor module and the LCD display module are respectively connected to the microcontroller module. The weighing sensor module is used to measure the weight of the bedridden patient and includes a weighing sensor mounted on the bed board. The LCD display module is used to display the weight data of the bedridden patient.

[0004] While this hospital bed can solve the problem of measuring the weight of bedridden patients, the prolonged lying down and the constant pressure of the patient's weight on the weighing sensor module are detrimental to its lifespan. Furthermore, the hospital already has beds available, and it's clearly not feasible to replace a bed solely for patient weight measurement. Moreover, the weight monitoring bed can only be used to measure the weight of one patient lying in it, and cannot be used for multiple patients. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a weight measuring device that can lift a patient off the hospital bed and measure their weight.

[0006] The technical solution adopted to solve the above problems is as follows: The bedridden patient weight measuring device includes a base, a lying board, a movable frame, a support device, a lying board pulling device, and an electrical control device; the movable frame is connected to the base; the support device is connected to the movable frame, and the movable frame can drive the support device to move back and forth. The support device includes support rollers that can be raised and lowered; the lying board pulling device is located behind the support device, and the lying board pulling device includes a pulling telescopic cylinder and a tension sensing device. The lower end of the pulling telescopic cylinder is hinged to the base, and the tension sensing device is connected to the upper end of the pulling telescopic cylinder; the lying board is set horizontally, with the middle part of the lying board resting on the support rollers, the rear end of the lying board hinged to the tension sensing device, and the front part of the lying board extending out of the base; the electrical control device is connected to the base, and the electrical control device can control the movable frame, the support device, and the lying board pulling device, and can calculate the weight of the patient lying on the lying board based on the measurement value of the tension sensing device.

[0007] Furthermore, the method by which the electronic control device 6 calculates the weight of the patient lying on the reclining board 4 includes the following steps:

[0008] A. Taking the supporting roller as the fulcrum, according to the torque balance formula, we get F1L1+F2L2=F3L3, where F1 is the patient's weight, L1 is the lever arm length of the patient's weight, F2 is the weight of the lying board, L2 is the lever arm length of the lying board's weight, F3 is the pulling force of the lying board pulling device measured by the pulling force sensor, and L3 is the lever arm of the pulling force of the lying board pulling device.

[0009] B. The moving frame moves and changes the position of the support roller. With the support roller as the fulcrum, according to the torque balance formula, F1L1+L4+F2L2+L4=F4L5 is obtained, where L4 is the moving distance of the support roller, F4 is the pulling force of the lying board pulling device measured by the tension sensor, and L5 is the lever arm of the pulling force of the lying board pulling device.

[0010] C. Based on the above formulas F1L1+F2L2=F3L3 and F1L1+L4+F2L2+L4=F4L5, we can derive F1=F4L5-F3L3-F2L4÷L4. F2, F3, F4, L3, L4, and L5 are all direct measurements or parameters of the bedridden patient's weight measuring device, and therefore are all known quantities. Thus, we can determine the patient's weight on the bed. Furthermore, based on the formula F1=mg, where g is the acceleration due to gravity, we can determine the patient's weight m.

[0011] Furthermore, the movable frame includes two translation guide rods, a movable frame body, and a translation drive cylinder. The two translation guide rods are parallel and spaced apart and connected to the base. The movable frame body has two translation guide sleeves, which are respectively fitted onto the two translation guide rods. One end of the translation drive cylinder is connected to the base, and the other end is connected to the movable frame body. The support device is connected to the movable frame body.

[0012] Furthermore, the support device includes a support frame, a support guide sleeve, and a support cylinder. There are two support guide sleeves, which are parallel and spaced apart and connected to the main body of the movable frame. Two support guide rods are provided on the support frame, and the two support guide rods are inserted into the two support guide sleeves respectively. The two ends of the support cylinder are connected to the main body of the movable frame and the support frame respectively. There are two support rollers, which are spaced apart in the left and right directions and are both connected to the support frame.

[0013] Furthermore, the reclining board includes a middle board, a head board, and a leg board. The middle board rests on support rollers and is hinged to a tension sensing device. The head board and leg board are located on the left and right sides of the middle board, respectively, and are connected to the middle board. The head board and leg board can be folded over the middle board.

[0014] Furthermore, the reclining board includes a middle upright board, a head upright board, and a leg upright board. The middle upright board, the head upright board, and the leg upright board are connected to the middle board, the head board, and the leg board, respectively. The head upright board, the leg upright board, and the leg upright board are all hinged to the middle upright board and rest on the middle board.

[0015] Furthermore, the bedridden patient weight measuring device includes a balance plate, which is horizontally positioned behind the base and connected to the base.

[0016] Furthermore, the balance plate is hinged to the base, allowing the balance plate to be rotated to a vertical position.

[0017] The beneficial effects of this invention are: Figure 3 As shown, in use, the patient lies on their side; then the invention is moved so that the front of the reclining board is above the bed and close to the patient; then the support rollers descend, and the telescopic cylinder shortens, causing the reclining board to move down and rest against the bed; then the patient lies flat on the reclining board and moves slightly, thus lying on the reclining board; then the support rollers rise, and the telescopic cylinder extends, causing the reclining board to rise slightly to support the patient. The invention can then calculate the patient's weight lying on the reclining board based on the measurement value from the tension sensor. After the measurement is completed, the reclining board is lowered to rest against the bed, and the patient can leave the reclining board by moving slightly and lying on their side; then the invention can be removed.

[0018] This invention facilitates weight measurement for bedridden patients. It makes it easier for patients to move onto the device for measurement and then remove it afterward. Compared to technical solutions that directly modify the hospital bed to make it suitable for weight measurement, this invention can be used to measure the weight of different patients, and the components are not subjected to stress when not in use, thus extending its lifespan. Attached Figure Description

[0019] Figure 1 This is a front view of a weight measuring device for bedridden patients;

[0020] Figure 2 This is a top view of a weight measurement device for bedridden patients;

[0021] Figure 3 This is a diagram showing the usage status of a weight measuring device for bedridden patients;

[0022] Figure 4 This is a diagram showing the calculation parameters of a weight measurement device for bedridden patients;

[0023] Figure 5 This is a structural diagram of the mobile frame;

[0024] Figure 6 This is a structural diagram of the support device;

[0025] Figure 7 It is a reclining board structure;

[0026] Figure 8 This is a diagram showing the stored state of the weight measuring device for bedridden patients.

[0027] Figure 9 This is a diagram showing the reclining board in its stored state;

[0028] The components in the diagram are labeled as follows: base 1, moving frame 2, translation guide rod 21, moving frame body 22, translation guide sleeve 221, translation drive cylinder 23, support device 3, support frame 31, support guide rod 311, support guide sleeve 32, support cylinder 33, support roller 34, lying board 4, middle board 41, head board 42, leg board 43, middle upright board 44, head upright board 45, leg upright board 46, lying board pulling device 5, pulling telescopic cylinder 51, tension sensor 52, electrical control device 6, balance plate 7. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] like Figure 1 and Figure 2 As shown, the bedridden patient weight measuring device includes a base 1, a lying board 4, a movable frame 2, a support device 3, a lying board pulling device 5, and an electrical control device 6; the movable frame 2 is connected to the base 1; the support device 3 is connected to the movable frame 2, and the movable frame 2 can drive the support device 3 to move back and forth. The support device 3 includes support rollers 34 that can be raised and lowered; the lying board pulling device 5 is located behind the support device 3, and the lying board pulling device 5 includes a pulling telescopic cylinder 51 and a tension sensing device 52. The lower end of the recumbent board 4 is hinged to the base 1, and the tension sensor 52 is connected to the upper end of the telescopic cylinder 51. The recumbent board 4 is horizontally set, with the middle part of the recumbent board 4 resting on the support roller 34. The rear end of the recumbent board 4 is hinged to the tension sensor 52, and the front part of the recumbent board 4 extends out of the base 1. The electronic control device 6 is connected to the base 1. The electronic control device 6 can control the moving frame 2, the support device 3 and the recumbent board pulling device 5, and can calculate the weight of the patient lying on the recumbent board 4 based on the measurement value of the tension sensor 52.

[0031] like Figure 3 As shown, when using this invention, the patient lies on their side; then the invention is moved so that the front part of the reclining board 4 is above the bed and close to the patient; then the support roller 34 descends, and the extension cylinder 51 is pulled to shorten, causing the reclining board 4 to move down and rest against the bed; then the patient lies flat on the reclining board 4 and moves slightly, so the patient is lying on the reclining board 4; then the support roller 34 rises, and the extension cylinder 51 is pulled to extend, causing the reclining board 4 to rise slightly to support the patient. The invention can then calculate the patient's weight lying on the reclining board 4 based on the measurement value of the tension sensor 52. After the measurement is completed, the reclining board 4 descends to rest against the bed, and the patient can leave the reclining board 4 by moving slightly and lying on their side; then the invention can be removed.

[0032] Since the patient lies on the front of the reclining board 4, and the front of the reclining board 4 extends from the base 1, if a weighing device were placed directly on the base 1 for weighing, the accuracy of the measurement would be difficult to guarantee because the patient is far from the weighing device. If the weighing device were placed below the front of the reclining board 4, the weighing device would also need to be located above the hospital bed, thus the surface of the reclining board 4 would be far from the hospital bed, making it difficult for the patient to move onto the reclining board 4. Therefore, this invention uses the measurement value of the tension sensor 52 to calculate the weight of the patient lying on the reclining board 4. This improves measurement accuracy and reduces the distance between the surface of the reclining board 4 and the hospital bed, making it easier for the patient to move onto the reclining board 4.

[0033] like Figure 4 As shown, the method by which the electronic control device 6 calculates the weight of the patient lying on the reclining board 4 includes the following steps:

[0034] A. Taking the supporting roller 34 as the fulcrum, according to the torque balance formula, F1L1+F2L2=F3L3, where F1 is the patient's weight, L1 is the lever arm length of the patient's weight, F2 is the weight of the lying board 4, L2 is the lever arm length of the weight of the lying board 4, F3 is the pulling force of the lying board pulling device 5 measured by the pulling force sensor 52, and L3 is the lever arm of the pulling force of the lying board pulling device 5.

[0035] B. The movable frame 2 moves to change the position of the support roller 34. With the support roller 34 as the fulcrum, according to the torque balance formula, F1L1+L4+F2L2+L4=F4L5 is obtained, where L4 is the moving distance of the support roller 34, F4 is the pulling force of the reclining board pulling device 5 measured by the tension sensor 52, and L5 is the lever arm of the pulling force of the reclining board pulling device 5.

[0036] C. Based on the above formulas F1L1+F2L2=F3L3 and F1L1+L4+F2L2+L4=F4L5, we can derive F1=F4L5-F3L3-F2L4÷L4. F2, F3, F4, L3, L4, and L5 are all direct measurements or parameters of the bedridden patient weight measuring device, and therefore are all known quantities. Thus, we can obtain the weight of the patient on the lying board 4. Then, based on the formula F1=mg, where g is the gravitational acceleration, we can obtain the patient's weight m.

[0037] Of the parameters mentioned above, F2, L3, L4, and L5 are parameters specific to this invention and are pre-entered into the electronic control device 6. F3 and F4 are measured values ​​from the tension sensing device 52, which are then transmitted to the electronic control device 6. There is a slight frictional force between the support roller 34 and the reclining plate 4, and also a slight frictional force at the hinge point between the rear end of the reclining plate 4 and the tension sensing device 52. The surfaces of these two components can be made very smooth to reduce the frictional force to a negligible level. Alternatively, a correction can be added to the formula F1 = F4L5 - F3L3 - F2L4 ÷ L4 to compensate for the measurement error caused by the aforementioned frictional force.

[0038] The base 1 serves as the mounting base for the components of this invention. Rollers can be installed at the bottom of the base 1 to facilitate movement of the invention. The tension sensing device 52 can be an existing tension sensor with a hinged hole.

[0039] The specific structure of the movable frame 2 is as follows: Figure 5 As shown, the movable frame 2 includes a translation guide rod 21, a movable frame body 22, and a translation drive cylinder 23. There are two translation guide rods 21, which are parallel and spaced apart and connected to the base 1. The movable frame body 22 has two translation guide sleeves 221, which are respectively fitted onto the two translation guide rods 21. One end of the translation drive cylinder 23 is connected to the base 1, and the other end is connected to the movable frame body 22. The support device 3 is connected to the movable frame body 22.

[0040] The translation guide rod 21 and the translation guide sleeve 221 are used to ensure the forward and backward translation of the main body 22 of the moving frame. The forward and backward translation of the main body 22 of the moving frame can be achieved by extending or retracting the translation drive cylinder 23. The translation drive cylinder 23 can be an electric telescopic cylinder. The ultimate purpose of the moving frame 2 is to drive the support rollers 34 to move forward and backward, in order to realize the above calculation method.

[0041] The specific structure of the support device 3 is as follows: Figure 6 As shown, the support device 3 includes a support frame 31, a support guide sleeve 32, and a support cylinder 33. There are two support guide sleeves 32, which are parallel and spaced apart and connected to the main body 22 of the movable frame. Two support guide rods 311 are provided on the support frame 31, and the two support guide rods 311 are respectively inserted into the two support guide sleeves 32. The two ends of the support cylinder 33 are respectively connected to the main body 22 of the movable frame and the support frame 31. There are two support rollers 34, which are spaced apart in the left and right directions and are both connected to the support frame 31.

[0042] The support guide rod 311 and the support guide sleeve 32 are used to ensure the vertical movement of the support frame 31, which in turn causes the support roller 34 to move vertically. The extension and retraction of the support cylinder 33 also allows the support frame 31 to move vertically. The support device 3 and the reclining board pulling device 5 together enable the reclining board 4 to move vertically.

[0043] The reclining board 4 can be a single flat panel, but this would take up too much space, making it inconvenient to move and store. To reduce the space occupied by this invention, as... Figure 7 As shown, the reclining board 4 includes a middle board 41, a head board 42, and a leg board 43. The middle board 41 rests on the support rollers 34 and is hinged to the tension sensing device 52. The head board 42 and the leg board 43 are located on the left and right sides of the middle board 41, respectively, and are connected to the middle board 41. The head board 42 and the leg board 43 can be folded above the middle board 41.

[0044] The specific reclining board 4 includes a middle upright board 44, a head upright board 45, and a leg upright board 46. The middle upright board 44, the head upright board 45, and the leg upright board 46 are respectively connected to the middle board 41, the head board 42, and the leg board 43. The head upright board 45, the leg upright board 46, and the leg upright board 46 are all hinged to the middle upright board 44 and rest on the middle board 41.

[0045] By making the hinge points of the head upright plate 45 and the leg upright plate 46 different from those of the middle upright plate 44, the following can be achieved: Figure 9 As shown, both the head plate 42 and the leg plates 43 are folded above the middle plate 41. This significantly reduces the space occupied by the invention in the lateral direction. Furthermore, as... Figure 8 As shown, the reclining board 4 can be tilted by extending the support cylinder 33, pulling the telescopic cylinder 51 to shorten, and moving the moving frame 2 backward, thereby reducing the space occupied by the present invention in the front-to-back direction.

[0046] When the patient lies on the reclining board 4, the invention tends to tilt forward under pressure. A counterweight could be placed at the rear of the base 1 to balance the patient's weight, but this would increase the weight of the invention itself, which is not optimal. Therefore, the preferred method for this invention is for the bedridden patient weight measuring device to include a balance board 7, which is horizontally positioned behind and connected to the base 1. The operator can stand on the balance board 7 to operate the invention, using the operator's weight to balance the patient's weight.

[0047] To reduce space occupation, it is preferable that the balance plate 7 is hinged to the base 1, and the balance plate 7 can be rotated to a vertical position.

Claims

1. A weight measuring device for bedridden patients, characterized in that: The device includes a base (1), a reclining board (4), a moving frame (2), a support device (3), a reclining board pulling device (5), and an electrical control device (6). The moving frame (2) is connected to the base (1). The support device (3) is connected to the moving frame (2), and the moving frame (2) can drive the support device (3) to move back and forth. The support device (3) includes support rollers (34) that can be raised and lowered. The reclining board pulling device (5) is located behind the support device (3). The reclining board pulling device (5) includes a pulling telescopic cylinder (51) and a tension sensing device (52). The lower end of the pulling telescopic cylinder (51) is connected to the base. The seat (1) is hinged, and the tension sensing device (52) is connected to the upper end of the pull telescopic cylinder (51); the reclining board (4) is set horizontally, the middle part of the reclining board (4) rests on the support roller (34), the rear end of the reclining board (4) is hinged to the tension sensing device (52), and the front part of the reclining board (4) extends out of the base (1); the electronic control device (6) is connected to the base (1), and the electronic control device (6) can control the moving frame (2), the support device (3) and the reclining board pull device (5), and can calculate the weight of the patient lying on the reclining board (4) based on the measurement value of the tension sensing device (52).

2. The bedridden patient weight measuring device according to claim 1, characterized in that: The method by which the electronic control device (6) calculates the weight of a patient lying on a reclining board (4) includes the following steps: A. Taking the support roller (34) as the fulcrum, according to the torque balance formula, F1L1+F2L2=F3L3, where F1 is the patient's weight, L1 is the lever arm length of the patient's weight, F2 is the weight of the lying board (4), L2 is the lever arm length of the weight of the lying board (4), F3 is the pulling force of the lying board pulling device (5) measured by the pulling force sensor (52), and L3 is the lever arm of the pulling force of the lying board pulling device (5). B. The moving frame (2) moves and changes the position of the support roller (34). With the support roller (34) as the fulcrum, according to the torque balance formula, F1(L1+L4)+F2(L2+L4)=F4L5 is obtained, where L4 is the moving distance of the support roller (34), F4 is the pulling force of the lying board pulling device (5) measured by the tension sensor (52), and L5 is the lever arm of the pulling force of the lying board pulling device (5). C. Based on the above formulas F1L1+F2L2=F3L3 and F1(L1+L4)+F2(L2+L4)=F4L5, we can obtain F1=(F4L5-F3L3-F2L4)÷L4. F2, F3, F4, L3, L4, and L5 are all direct measurements or parameters of the bedridden patient weight measuring device, so they are all known quantities. Thus, we can obtain the weight of the patient on the lying board (4). Then, based on the formula F1=mg, where g is the gravitational acceleration, we can obtain the patient's weight m.

3. The bedridden patient weight measuring device according to claim 2, characterized in that: The movable frame (2) includes a translation guide rod (21), a movable frame body (22), and a translation drive cylinder (23). There are two translation guide rods (21), which are parallel and spaced apart and connected to the base (1). The movable frame body (22) has two translation guide sleeves (221), which are respectively fitted onto the two translation guide rods (21). One end of the translation drive cylinder (23) is connected to the base (1), and the other end is connected to the movable frame body (22). The support device (3) is connected to the movable frame body (22).

4. The bedridden patient weight measuring device according to claim 3, characterized in that: The support device (3) includes a support frame (31), a support guide sleeve (32), and a support cylinder (33). There are two support guide sleeves (32), which are parallel and spaced apart and connected to the main body (22) of the moving frame. There are two support guide rods (311) on the support frame (31), which are inserted into the two support guide sleeves (32) respectively. The two ends of the support cylinder (33) are connected to the main body (22) of the moving frame (22) and the support frame (31) respectively. There are two support rollers (34), which are spaced apart in the left and right directions and are both connected to the support frame (31).

5. The bedridden patient weight measuring device according to claim 2, characterized in that: The reclining board (4) includes a middle board (41), a head board (42) and a leg board (43). The middle board (41) rests on a support roller (34) and is hinged to a tension sensing device (52). The head board (42) and the leg board (43) are located on the left and right sides of the middle board (41) and are connected to the middle board (41). The head board (42) and the leg board (43) can be folded over the middle board (41).

6. The bedridden patient weight measuring device according to claim 5, characterized in that: The reclining board (4) includes a middle upright board (44), a head upright board (45) and a leg upright board (46). The middle upright board (44), the head upright board (45) and the leg upright board (46) are connected to the middle board (41), the head board (42) and the leg board (43) respectively. The head upright board (45), the leg upright board (46) and the leg upright board (46) are all hinged to the middle upright board (44) and rest on the middle board (41).

7. The bedridden patient weight measuring device according to any one of claims 1 to 6, characterized in that: Includes a balance plate (7), which is horizontally positioned behind the base (1) and connected to the base (1).

8. The bedridden patient weight measuring device according to claim 7, characterized in that: The balance plate (7) is hinged to the base (1), and the balance plate (7) can be rotated to a vertical position.

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