Adaptive sign intelligent blood sampling chair and working method thereof

Abstract

This invention provides an adaptive intelligent blood collection chair and its operating method. The chair includes a seat cushion, leg rests, a backrest, an oxygen mask, and a detection module. The detection module collects the physiological characteristics of blood donors seated on the cushion. Based on the real-time physiological characteristic detection results, the chair's posture is adjusted in a coordinated manner. It can achieve differentiated and graded adaptive posture adjustment for two different abnormal physiological conditions: pre-syncope and shock risk. By matching the corresponding backrest tilt angle and leg rest support height, it optimizes the body's blood circulation and progressively strengthens the emergency protection level. Simultaneously, combined with the oxygen mask's adjustment mode, it achieves graded protection effects: pre-positioning for mild cases and immediate oxygen supply for severe cases. The overall movement is smooth, and the reset logic is stable and orderly, effectively improving the donor's ability to cope with sudden physical discomfort during blood donation and significantly enhancing the safety and adaptability of the intelligent blood collection chair.

Description

Technical Field

[0001] This invention relates to the field of blood collection chair technology, and in particular to an intelligent blood collection chair that adapts to physical signs and its working method. Background Technology

[0002] Clinical blood collection is widely used in medical institutions at all levels and professional blood collection sites. Blood collection chairs are indispensable auxiliary equipment in blood collection work, mainly used to provide support for blood donors to sit on, ensuring the smooth conduct of routine blood collection procedures. Currently, most standard blood collection chairs on the market have a basic support structure, meeting the basic needs of blood donors for seated blood collection. Some blood collection equipment also includes simple oxygen supply components and backrest structures to adapt to the basic usage environment of blood collection scenarios.

[0003] Existing traditional blood collection chairs are mostly designed with a fixed structure, and the overall posture cannot be flexibly adjusted. They cannot adapt to the real-time physical condition of blood donors during blood collection, and it is difficult to simultaneously adjust the body position and emergency protection components when blood donors suddenly feel unwell. The overall emergency protection adaptability is obviously insufficient. Summary of the Invention

[0004] To address the shortcomings mentioned above in the background technology, this invention provides an intelligent blood collection chair that adapts to vital signs and its working method.

[0005] The present invention adopts the following technical solution: In a first aspect, the present invention discloses an intelligent blood collection chair that adapts to vital signs, the blood collection chair including a seat cushion, a leg rest cushion, a backrest cushion, an oxygen mask and a detection module; The interior beneath the seat cushion forms an accommodating space, and the seat cushion is provided with guide grooves on both sides of the accommodating space. The two guide grooves are mirror images of each other. Each guide groove includes a horizontal section and a vertical section. The vertical section and the horizontal section are connected at the end near the front end of the seat cushion, and the vertical section is vertically oriented. Guide wheels are provided on both sides of the leg support pad. The two guide wheels are respectively fitted into the two guide grooves to form a sliding fit. When the guide wheel moves to the end of the horizontal section away from the vertical section, the leg support pad is embedded in the receiving space. When the guide wheel moves to the upper end of the vertical section, the leg support pad moves to connect with the front end of the seat cushion. The backrest cushion is connected to the rear end of the seat cushion, and the backrest cushion is swayable relative to the seat cushion; An oxygen supply pipe is arranged inside the oxygen mask. The oxygen supply pipe is connected to an oxygen source and has multiple oxygen outlet holes. The oxygen mask is connected above the backrest cushion and swings relative to the backrest cushion until the oxygen supply pipe is in front of the headrest of the backrest cushion. The detection module is used to collect the physiological signs of blood donors. When the detection module detects abnormal signs of blood donors, the guide wheel of the leg support moves along the guide groove to the upper end of the vertical section, the backrest cushion swings to a preset angle to form a lying position, and the oxygen mask swings in conjunction with the oxygen supply tube to the position in front of the headrest of the backrest cushion.

[0006] In one possible improvement of the first aspect, the detection module collects real-time physiological data of the blood donor's heart rate, blood pressure, and blood oxygen saturation, compares and analyzes the collected physiological data, and identifies two types of abnormal conditions: pre-syncope and risk of shock. The detection module can trigger the posture linkage adjustment of the leg support, the backrest, and the oxygen mask based on the identified abnormal conditions.

[0007] In one possible improvement of the first aspect, the blood collection chair further includes a first drive mechanism disposed within the accommodating space. The first drive mechanism includes a first movable frame, a first transmission shaft, a first gear, and a first rack. The first movable frame is restricted to linear movement relative to the front and rear ends of the seat cushion. A support frame is fixed under the leg rest. Two guide wheels are respectively disposed on both sides of the support frame. The support frame is restricted to linear movement vertically relative to the first movable frame. The first rack is fixed below the first movable frame, the first drive shaft is disposed below the first movable frame and rotates about its own axis, the first gear is fixed to the first drive shaft and the first gear meshes with the first rack, and a drive motor is fixed in the accommodating space, the drive motor drives the first drive shaft to rotate.

[0008] In one possible improvement of the first aspect, the blood collection chair further includes a second drive mechanism disposed within the accommodating space. The second drive mechanism includes a second movable frame, a second transmission shaft, a second gear, and a second rack. The second movable frame is restricted to move linearly relative to the front and rear ends of the seat cushion. Linkage rods are fixed on both sides of the second movable frame. Strip holes are provided on both sides below the backrest cushion. The linkage pins of the two linkage rods are respectively adapted to be embedded in the two strip holes to form a slot-hole sliding fit structure. The second rack is fixed to the lower part of the second movable frame, the second drive shaft is arranged below the second movable frame and rotates around its own axis, the second gear is fixed to the second drive shaft and the second gear meshes with the second rack, and a drive motor is fixed in the accommodating space, which drives the second drive shaft to rotate.

[0009] In one possible improvement of the first aspect, the blood collection chair further includes a first drive mechanism disposed within the accommodating space. The first drive mechanism includes a first movable frame, a first transmission shaft, a first gear, and a first rack. The first movable frame is restricted to linear movement relative to the front and rear ends of the seat cushion. A support frame is fixed under the leg rest. Two guide wheels are respectively disposed on both sides of the support frame. The support frame is restricted to linear movement vertically relative to the first movable frame. The first rack is fixed to the bottom of the first movable frame, the first drive shaft is disposed below the first movable frame and rotates around its own axis, the first gear is fixed to the first drive shaft and the first gear meshes with the first rack, and the drive motor drives the first drive shaft and the second drive shaft to rotate synchronously.

[0010] In a possible improvement of the first aspect, both ends of the second rack are connected to engaging members, the engaging members having protruding teeth, and the engaging members and the second rack are elastically connected. When the second moving frame moves and pushes the strip hole to move through the linkage pin, causing the backrest cushion to complete the backward or upward flipping, the second moving frame is respectively at the extreme positions of its travel at both ends in its moving direction. When the second moving frame is at its limit position at one end of its travel, the teeth of the second gear rotate and push the meshing member to move in the direction of the second rack; When the teeth above the second gear rotate away from the second rack, the rotation of the second gear pushes the second rack to move to the other end of the second moving frame's travel, causing the second moving frame to move and push the strip hole to move, thereby causing the backrest cushion to flip upward.

[0011] In one possible improvement of the first aspect, both ends of the second rack are fixed with connecting ears, and both connecting ears are fixed with guide pins. The axis of the guide pins is parallel to the length direction of the second rack. The end of the guide pin away from the connecting ear is provided with a blocking part with an enlarged diameter. Both ends of the meshing member are provided with guide holes. The two guide holes are respectively adapted to fit the outside of the two guide pins, and springs are sleeved on the outside of the two guide pins. The two ends of the springs respectively abut against the connecting ear and the meshing member. When the second moving frame is at its limit position at one end of its travel, the teeth of the second gear rotate to push the meshing member to move toward the direction of the second rack and compress the spring. After the teeth of the second gear leave the teeth of the meshing member, the elastic force restored by the spring pushes the meshing member to move toward the direction of the blocking part. When the teeth of the second gear on the side closest to the second rack rotate away from the second rack, the teeth of the second gear push the teeth of the meshing member to move, pushing the meshing member against the blocking part.

[0012] In one possible improvement of the first aspect, the upper end of the backrest cushion is provided with a swing groove that runs through both sides. The swing groove is divided into a straight segment and an arc segment. One end of the arc segment connects to the side of the straight segment facing away from the backrest cushion, and the other end of the arc segment extends upward toward the front of the backrest cushion. A moving rod and a swing rod are fixed sequentially from top to bottom below the opening of the oxygen mask. Both the moving rod and the swing rod slide through the swing groove. When the moving rod moves along the straight segment to its upper position, it causes the oxygen mask to move upward along the height direction of the backrest cushion. At this time, the swing rod is located at the junction of the straight segment and the arc segment. As the swing arm moves along the arc segment, it causes the oxygen mask to flip downwards toward the front of the backrest cushion.

[0013] In one possible improvement of the first aspect, the blood collection chair further includes a third drive mechanism disposed within the backrest cushion. The third drive mechanism includes a first rotating shaft, a push plate, a first connecting rod, and a second connecting rod. The push plate is restricted to slide linearly relative to the upper and lower ends of the backrest cushion, and the side of the push plate facing the swing rod is an inclined guide surface. The lower end of the backrest cushion is fixed to the first rotating shaft. The backrest cushion is embedded in the seat cushion, and the first rotating shaft is restricted to rotate within the seat cushion. The first rotating shaft swings in conjunction with the first connecting rod. The two ends of the second connecting rod are pivotally connected to the first connecting rod and the push plate, respectively. When the backrest cushion flips backward around the first pivot, the first pivot, in conjunction with the first connecting rod, swings towards the back of the backrest cushion, pushing the second connecting rod to move the push plate towards the upper end of the backrest cushion. This causes the guide surface of the push plate to push the moving rod and the swing rod along the straight segment. When the moving rod reaches the upper end of the straight segment, the guide surface pushes the swing rod along the arc segment, causing the oxygen mask to flip downward towards the front of the backrest cushion.

[0014] Secondly, the present invention also discloses a method for operating the aforementioned blood collection chair, the method comprising the following steps: The detection module continuously collects the physiological signs of blood donors and determines their status in real time. The detection module is configured to: when a fainting precursor is detected, control the backrest cushion to flatten to a first angle and raise the leg rest to a first height. When a risk of shock is detected, the backrest cushion is flattened to the second angle and the leg support cushion is raised to connect with the seat cushion. The second angle is greater than the first angle. Once the detection module determines that the blood donor's physiological signs have returned to normal, the leg support cushion retracts downward and is stored in the accommodating space inside the seat cushion, the backrest cushion swings upward to return to its initial upright posture, and the oxygen mask simultaneously resets and fits onto the backrest cushion.

[0015] As can be seen from the above description of the structure of the present invention, compared with the prior art, the present invention has the following advantages: The present invention realizes the posture linkage adjustment of the blood collection chair based on the real-time physiological sign detection results of the blood donor by the detection module. When the blood donor has abnormal signs, it can quickly complete the coordinated adaptation and adjustment of lower limb support, back support and oxygen mask, reasonably optimize the blood donor's lying position, improve the body's blood circulation status, and simultaneously and quickly deploy emergency oxygen supply structure to deal with various sudden physical discomforts during the blood collection process in a timely manner, effectively strengthen the emergency protection capability of the blood collection operation process, and thus significantly improve the safety and adaptability of the blood collection process. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the initial state of the present invention.

[0017] Figure 2 This is a three-dimensional structural diagram of the present invention for use when a blood donor experiences abnormal physiological conditions.

[0018] Figure 3 for Figure 1 A lateral cross-sectional view.

[0019] Figure 4 for Figure 2 A lateral cross-sectional view.

[0020] Figure 5 for Figure 4 A magnified diagram of point A in the middle.

[0021] Figure 6 for Figure 1 A diagram showing the seat cushion, backrest cushion, and leg rest cushion hidden.

[0022] Figure 7 for Figure 6 A magnified diagram of point B in the middle.

[0023] Figure 8 A schematic diagram showing the leg support pad mounted on the first drive mechanism.

[0024] Figure 9 This is a schematic diagram of the overall three-dimensional structure of the leg support pad.

[0025] Figure 10A three-dimensional structural diagram of the first rack fixed under the first movable frame.

[0026] Figure 11 This is a three-dimensional structural diagram showing the linkage between the first and second drive mechanisms.

[0027] Figure 12 A three-dimensional structural diagram of the connection between the first and second drive shafts for the drive motor.

[0028] Figure 13 This is a three-dimensional structural diagram of the second movable frame.

[0029] Figure 14 for Figure 13 A magnified diagram of point C.

[0030] Figure 15 This is a partial cross-sectional schematic diagram of the transmission connection between the second gear and the meshing component.

[0031] Figure 16 This is a schematic diagram of the three-dimensional structure of the backrest cushion from the perspective of the back.

[0032] Figure 17 for Figure 16 A magnified diagram of point D in the middle. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will now be described in further detail with reference to the accompanying drawings.

[0034] Hereinafter, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this embodiment, unless otherwise stated, "a plurality of" means two or more.

[0035] Furthermore, in this embodiment, directional terms such as "upper" and "lower" are defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, used to describe and clarify relative positions, and can change accordingly depending on the orientation of the components in the accompanying drawings.

[0036] This invention provides an intelligent blood collection chair that adapts to vital signs and its working method, as shown in the attached figure. Figures 1 to 4As shown, the blood collection chair includes a seat cushion 1, a leg rest cushion 2, a backrest cushion 3, an oxygen mask 4, and a detection module, as well as a first drive mechanism 6, a second drive mechanism 7, and a third drive mechanism 8. The interior of the seat cushion 1 forms an accommodating space 101. The leg rest cushion 2 can be retracted into the accommodating space 101 by the first drive mechanism 6, meeting the needs of blood donors for normal seating. The backrest cushion 3 is mounted at the rear end of the seat cushion 1 to provide stable support for the blood donor's back, and it swings relative to the seat cushion 1 under the action of the second drive mechanism 7. An oxygen supply pipe 41 is arranged inside the oxygen mask 4, connected to an oxygen source. Specifically, the oxygen supply pipe 41 is connected to an oxygen cylinder via a flexible hose. The oxygen supply pipe 41 has multiple oxygen outlets. The oxygen mask 4 is connected above the backrest cushion 3, and it can swing relative to the backrest cushion 3 under the action of the third drive mechanism 8, so that the oxygen supply pipe 41 is positioned in front of the headrest area of ​​the backrest cushion 3. When a blood donor experiences fainting or shock during blood collection, the oxygen mask 4 flips over to face the backrest cushion 3, precisely fitting the donor's head and continuously delivering oxygen to create a sufficient and stable breathing environment. This effectively alleviates the donor's discomfort and enhances the safety of the blood collection process.

[0037] Continue to refer to the appendix Figure 1 and 2 The detection module is located on one side of the seat cushion 1. This module collects the blood donor's physiological signs and includes a vital signs monitoring unit and a control unit. The vital signs monitoring unit is equipped with an ECG electrode for collecting electrocardiogram signals, a PPG sensor for collecting blood oxygen saturation and pulse rate, and a blood pressure monitoring module for collecting blood pressure, thus simultaneously collecting the blood donor's heart rate, blood pressure, and blood oxygen saturation data. The control unit compares and analyzes the physiological sign data collected by the vital signs monitoring unit to determine the blood donor's abnormal physical condition, such as identifying fainting or shock risks. Based on the identified abnormal condition, it simultaneously triggers coordinated posture adjustments between the leg rest cushion 2, backrest cushion 3, and oxygen mask 4, performing corresponding structural deformations according to different abnormal physical conditions to ensure the blood donor's safety during the blood collection process.

[0038] As attached Figure 6 and 8As shown, the seat cushion 1 has guide grooves 11 on both sides of the accommodating space 101. The two guide grooves 11 are mirror images of each other, and are specifically located on the two side plates that enclose the accommodating space 101. The guide groove 11 includes a horizontal section 111 and a vertical section 112. The vertical section 112 is connected to the end of the horizontal section 111 near the front end of the seat cushion 1, and the vertical section 112 is vertically oriented. Referring to the attached figure, the leg support pad 2 has guide wheels 21 on both sides. The two guide wheels 21 are respectively fitted into the two guide grooves 11 to form a sliding fit, so that the horizontal section 111 and the vertical section 112 of the guide groove 11 form a rigid guiding constraint on the movement trajectory of the guide wheels 21, thereby enabling the first drive mechanism 6 to drive the leg support pad 2 to complete the displacement movement along the planned path formed by the horizontal section 111 and the vertical section 112. Specifically, as the guide wheel 21 moves to the end of the horizontal segment 111 away from the vertical segment 112, the guide wheel 21 first descends along the vertical segment 112 and then moves along the horizontal segment 111, causing the leg support pad 2 to be embedded into the receiving space 101. When the guide wheel 21 moves to the upper end of the vertical segment 112, it first moves along the horizontal segment 111 out of the receiving space 101, and then moves upward along the vertical segment 112, causing the leg support pad 2 to move to the front end of the connecting seat cushion 1.

[0039] Leg support pad 2 employs a composite moving structure combining horizontal translation and vertical lifting, replacing the conventional swinging opening and closing arrangement. This allows for the storage and deployment of leg support. The vertically upward support structure maintains a horizontal support plane, ensuring even and reasonable force distribution on the legs, reducing localized pressure, and optimizing user comfort. When a blood donor experiences a physical abnormality, the lifting structure of leg support pad 2 can smoothly elevate the lower limbs, accelerating blood return and balancing the body's blood circulation, adapting to emergency situations such as pre-fainting symptoms and the risk of shock. Compared to a swinging support structure, it offers a stronger overall fit and more reliable emergency protection.

[0040] As attached Figures 10 to 12As shown, the first drive mechanism 6 includes a first movable frame 61, a first transmission shaft 62, a first gear 63, and a first rack 64. The first movable frame 61 is restricted to linear movement relative to the front and rear ends of the seat cushion 1. In this embodiment, the limiting structure for linear movement is formed by a sliding pair consisting of a slide rail and a slider. For example, slide rails are installed on both sides inside the accommodating space 101, and sliders are installed on both sides of the first movable frame 61. The sliders and slide rails are fitted and matched to each other, thereby completing the limiting and guiding sliding of the first movable frame 61. A support frame 22 is fixed under the leg rest 2. Two guide wheels 21 are respectively arranged on both sides of the support frame 22, and the support frame 22 is restricted to linear movement vertically relative to the first movable frame 61. The first rack 64 is fixed below the first movable frame 61, the first transmission shaft 62 is arranged below the first movable frame 61 and rotates around its own axis, the first gear 63 is fixed to the first transmission shaft 62, and the first gear 63 and the first rack 64 mesh. A drive motor 51 is fixed inside the accommodating space 101. The drive motor 51 drives the first transmission shaft 62 to rotate, which in turn drives the first gear 63 to rotate and mesh with the first rack 64 to move, thereby driving the first moving frame 61 to linear displacement.

[0041] When the first moving frame 61 makes a linear displacement, the guide wheel 21 first slides laterally along the horizontal section 111, causing the support frame 22 and the leg support pad 2 to move out of the accommodating space 101 simultaneously. After the guide wheel 21 moves to the connection position between the horizontal section 111 and the vertical section 112, the continuous horizontal thrust of the first moving frame 61, combined with the groove orientation of the vertical section 112, drives the guide wheel 21 to move upward along the vertical section 112, causing the support frame 22 to make a vertical displacement relative to the first moving frame 61, thereby causing the leg support pad 2 to be lifted and unfolded. When the first moving frame 61 retracts backward, it causes the guide wheel 21 to first move downward along the vertical section 112 and then move laterally along the horizontal section 111 to be stored, and the support frame 22 and the leg support pad 2 are linked to complete the vertical folding and horizontal storage in sequence. It can be seen that the first drive mechanism 6, relying on the horizontal drive of the first moving frame 61 and the segmented limiting structure of the guide groove 11, can smoothly realize the compound movement of storing and unfolding the leg support pad 2.

[0042] As attached Figures 11 to 13As shown, the second drive mechanism 7 includes a second movable frame 71, a second transmission shaft 72, a second gear 73, and a second rack 74. The second movable frame 71 is restricted to linear movement relative to the front and rear ends of the seat cushion 1. Linkage rods are fixed to both sides of the second movable frame 71, and linkage pins 751 are fixed to the ends of the linkage rods 75. Strip holes 31 are provided on both sides below the backrest cushion 3, and the linkage pins 751 of the two linkage rods are respectively fitted into the two strip holes 31 to form a slot-hole sliding fit structure. Referring again to the attached drawings, the second rack 74 is fixed below the second movable frame 71, the second transmission shaft 72 is located below the second movable frame 71 and rotates around its own axis, the second gear 73 is fixed to the second transmission shaft 72, and the second gear 73 meshes with the second rack 74. Synchronous pulleys are respectively mounted on the output shaft of the drive motor 51, the first transmission shaft 62, and the second transmission shaft 72, and the three sets of synchronous pulleys mesh together on a synchronous belt. During operation, the drive motor 51 transmits rotational power through a ring transmission structure consisting of a synchronous pulley and a synchronous belt, thereby driving the first drive shaft 62 and the second drive shaft 72 to maintain synchronous operation with the same speed.

[0043] When the second drive shaft 72 rotates, it drives the second rack 74 to produce linear displacement through the meshing transmission relationship between the second gear 73 and the second rack 74, thereby pulling the second moving frame 71 to complete the smooth forward and backward movement relative to the seat cushion 1. During the displacement of the second moving frame 71, the linkage rod moves along with it, and the linkage pin 751 slides relative to the slot 31. Through the linkage between the rod and the slot, the backrest cushion 3 is continuously pushed and pulled, thereby completing the swinging action of the backrest cushion 3 and realizing the flexible adjustment of the tilt angle of the backrest cushion 3. In addition, in the accommodating space 101 inside the seat cushion 1, the two ends of the slide rail that limits the linear movement of the second moving frame 71 are fixed with stops. The stops physically block and limit the second moving frame 71, thereby defining the limit position of the reciprocating motion of the second moving frame 71. This limiting structure simultaneously constrains the maximum adjustment range of the backrest cushion 3, thereby limiting the extreme values ​​of the upward adjustment and backward tilt angle of the backrest cushion 3.

[0044] Please refer to the appendix. Figure 14 and 15Both ends of the second rack 74 are connected to engaging members 76, which have protruding teeth. The engaging members 76 and the second rack 74 are connected by springs 77 to form an elastic connection structure. Specifically, both ends of the second rack 74 are fixed with connecting ears 741, and both connecting ears 741 are fixed with guide pins 742 by threaded connection. The axis of the guide pins 742 is parallel to the length direction of the second rack 74. The end of the guide pin 742 away from the connecting ears 741 is provided with a blocking part 743 with an enlarged diameter. Both ends of the engaging member 76 are provided with guide holes, which are respectively adapted to fit the two guide pins 742. Springs 77 are fitted on the outside of both guide pins 742. The two ends of the springs 77 abut against the connecting ears 741 and the engaging member 76, respectively, so that the engaging member 76 moves elastically relative to the second rack 74. In this structure, when the second moving frame 71 is blocked by the stop block and is at the limit position at one end of its stroke, the teeth of the second gear 73 rotate to push the meshing member 76 to move in the direction of the second rack 74 and compress the spring 77. After the teeth of the second gear 73 leave the teeth of the meshing member 76, the elastic force restored by the spring 77 pushes the meshing member 76 to move in the direction of the blocking part 743.

[0045] Because the adjustment stroke required for the leg rest 2 is greater than that for the backrest cushion 3, the first drive shaft 62 and the second drive shaft 72 maintain synchronous and linked rotation throughout the entire process. Therefore, after the backrest cushion 3 completes the angle adjustment and reaches its travel limit, the second drive shaft 72 will continue to rotate following the first drive shaft 62. Thus, the aforementioned meshing component 76 and spring 77 combine to form an elastic clutch structure. During the continuous forward rotation of the second gear 73, the second gear 73 squeezes the meshing component 76 and compresses the spring 77 to achieve elastic avoidance, releasing the rigid transmission engagement between the second gear 73 and the second rack 74, leaving the second drive shaft 72 in an idling state. When the blood collection chair is adjusted in the reverse direction, the second gear 73 rotates in the reverse direction, meshing with the teeth of the meshing component 76, causing the meshing component 76 to be pressed against the blocking part 743 to form a fixed limit. The meshing state remains stable, without elastic retraction, and does not interfere with the second gear 73 driving the second rack 74 to move smoothly in the reverse direction, reliably achieving the return and reset action of the backrest cushion 3. This structure ensures that the leg support pad 2 can smoothly complete the remaining travel adjustment without affecting the continuous power output of the first drive shaft 62, while taking into account both unidirectional overload avoidance and reverse stable transmission.

[0046] As attached Figure 16 and 17As shown, the upper end of the backrest cushion 3 is provided with a swing groove 32 that runs through both sides. The swing groove 32 is divided into a straight segment 321 and an arc segment 322. One end of the arc segment 322 connects to the side of the straight segment 321 facing away from the backrest cushion 3, and the other end of the arc segment 322 extends upward towards the front of the backrest cushion 3. Below the open portion of the oxygen mask 4, a moving rod 42 and a swing rod 43 are fixed sequentially from top to bottom. Both the moving rod 42 and the swing rod 43 slide through the swing groove 32 and maintain a sliding fit. When the moving rod 42 moves along the straight segment 321 to its upper position, it causes the oxygen mask 4 to move upward along the height direction of the backrest cushion 3. At this time, the swing rod 43 is located at the junction of the straight segment 321 and the arc segment 322. When the swing arm 43 moves along the arc segment 322, it causes the oxygen mask 4 to flip downwards towards the front of the backrest cushion 3, so that the oxygen mask 4 completely covers the head area of ​​the seated blood collection personnel, quickly creating a continuous and stable oxygen supply environment to meet the respiratory protection needs of blood collection personnel in case of sudden physical discomfort.

[0047] Please refer to the appendix. Figures 5 to 7 The third drive mechanism 8 includes a first rotating shaft 81, a push plate 82, a first connecting rod 83, and a second connecting rod 84. The push plate 82 is restricted to slide linearly relative to the upper and lower ends of the backrest cushion 3, and the side of the push plate 82 facing the swing rod 43 is an inclined guide surface. The first rotating shaft 81 is fixed to the lower end of the backrest cushion 3, which is embedded in the seat cushion 1. The first rotating shaft 81 is also housed and confined inside the seat cushion 1, allowing the backrest cushion 3 to swing relative to the seat cushion 1 around the first rotating shaft 81 as an axis. The first rotating shaft 81 swings in conjunction with the first connecting rod 83. Furthermore, to approach the position of the first connecting rod 83, a rotatable second rotating shaft 85 can be provided inside the backrest cushion 3 near the upper position. The first rotating shaft 81 and the second rotating shaft 85 are driven by a synchronous pulley and a synchronous belt. One end of the first connecting rod 83 is fixed to the second rotating shaft 85, so that the rotation of the first rotating shaft 81 is linked to the synchronous rotation of the second rotating shaft 85, thereby driving the first connecting rod 83 to swing.

[0048] The two ends of the second link 84 are pivotally connected to the first link 83 and the push plate 82, respectively. When the backrest cushion 3 is flipped backward around the first pivot 81, the first pivot 81, in conjunction with the first link 83, swings and moves towards the back of the backrest cushion 3, pushing the second link 84 to move the push plate 82 towards the upper end of the backrest cushion 3. During the movement of the push plate 82, it gradually pushes the moving rod 42 and the swing rod 43 along the straight section 321 by relying on the inclined guide surface. When the moving rod 42 moves to the position of abutting the upper end of the straight section 321, the guide surface continues to apply a pushing force, driving the swing rod 43 to slide along the trajectory of the arc section 322, thereby causing the oxygen mask 4 to flip downward towards the front of the backrest cushion 3.

[0049] In addition, a tension spring 86 connects the swing rod 43 to the lower end of the backrest cushion 3. The tension spring 86 continuously provides an elastic traction force to pull the oxygen mask 4 downwards towards the backrest cushion 3. When the push plate 82 pushes the moving rod 42 and the swing rod 43 upwards along the straight section 321, the swing rod 43 deflects and stretches the tension spring 86. When the push plate 82 returns to its original position and retracts, the swing rod 43 loses its pushing resistance. The force of the stretched tension spring 86 restoring its deformation first pulls the swing rod 43 to swing and rotate, causing it to return to its original position and fit against the straight section 321. Then, the swing rod 43 drives the moving rod 42 to return to its original position simultaneously. It can be seen that this structure allows the oxygen mask 4 to be flipped backwards and then moved downwards when not in use, and finally stored and fitted above the backrest cushion 3. Compared with the structure that simply flips backwards directly, it can effectively save the arrangement space behind the backrest cushion 3.

[0050] This invention also discloses a working method for the aforementioned adaptive intelligent blood collection chair, which, combined with the overall structure of the aforementioned blood collection chair, forms a collaborative usage logic. The method includes the following steps: The detection module continuously collects the physiological signs data of blood donors, and its internal control unit performs real-time analysis of the collected physiological signs data to determine the blood donor's vital signs status. When the control unit determines that the blood donor is experiencing pre-syncope symptoms, the drive motor 51 starts and outputs power, synchronously driving the first drive mechanism 6 and the second drive mechanism 7. The second drive mechanism 7, while causing the backrest cushion 3 to swing, also drives the third drive mechanism 8. Specifically, the second drive mechanism 7 flattens the backrest cushion 3 to a first angle, preferably 115° (based on the vertically upright position of the backrest cushion 3). Simultaneously, the first drive mechanism 6 raises the leg rest 2 to a preset first height, preferably 80mm higher than the upper surface of the seat cushion 1. Due to the synchronous linkage transmission structure of the entire machine, the third drive mechanism 8 moves synchronously with the backward swing of the backrest cushion 3, causing the oxygen mask 4 to move vertically upward relative to the backrest cushion 3. This causes the swing rod 43 to stop at the intersection of the straight section 321 and the arc section 322 of the swing groove 32. The oxygen mask 4 only completes the upward pre-adjustment and does not flip forward toward the blood donor's head. This slight backward leaning posture combined with lower limb elevation can effectively accelerate blood return from the lower limbs, increase blood supply to the brain, and relieve discomfort symptoms such as dizziness and weakness in blood donors before fainting. At the same time, the oxygen mask 4 is in a pre-positioned standby state, which will not obstruct the blood donor's vision or cause pressure discomfort, and can be quickly switched to oxygen supply mode if the vital signs deteriorate further. When the control unit determines that the blood donor is in a physiological state at risk of shock, the drive motor 51 continues to output power, synchronously driving the first drive mechanism 6, the second drive mechanism 7, and the third drive mechanism 8 to work together. The second drive mechanism 7 adjusts the backrest cushion 3 to a second angle, specifically 135° in this embodiment (based on the vertical upright position of the backrest cushion 3). The backward tilt of the backrest cushion 3 further increases. Under the premise of overall synchronous transmission, the first drive mechanism 6 synchronously drives the leg rest cushion 2 to continue rising to the desired position. With the seat cushion 1 in place, a near-flat position is formed. The third drive mechanism 8 simultaneously pushes the moving rod 42 and the swing rod 43 to continue moving forward, causing the swing rod 43 to slide along the arc segment 322 from the intersection of the straight segment 321 and the arc segment 322. This causes the oxygen mask 4 to flip towards the front of the backrest cushion 3, so that the oxygen supply pipe 41 inside the oxygen mask 4 is precisely aligned with the area in front of the headrest of the backrest cushion 3. Oxygen is then output through the oxygen supply pipe 41 to provide the blood donor with sufficient oxygen in a timely manner. Combined with the large-angle flat position, this can meet the emergency protection needs in a state of shock. When the control unit determines that the blood donor's physiological signs have returned to normal, the drive motor 51 reverses its rotation, and the first drive mechanism 6, the second drive mechanism 7, and the third drive mechanism 8 simultaneously reverse their operation. The push plate 82 inside the third drive mechanism 8 retracts synchronously, releasing the pushing restriction on the moving rod 42 and the swing rod 43. The tension spring 86 connected to the lower end of the backrest cushion 3 generates an elastic recoil force, which first pulls the swing rod 43 to swing and rotate and reset to the straight section 321 of the swing groove 32. Then, through the linkage of the swing rod 43, the moving rod 42 is synchronously reset, so that the oxygen mask 4 sequentially completes the action of flipping backward and moving downward, and finally the whole thing is stored and fitted on top of the backrest cushion 3.

[0051] The above-mentioned working method relies on the real-time monitoring and identification of vital signs by the detection module and the coordinated action of multiple institutions. It achieves differentiated and graded adaptive posture adjustment for two different abnormal physiological conditions: syncope precursors and shock risk. By matching the corresponding backrest tilt angle and the support height of the leg rest 2, it optimizes the human body's blood circulation status and strengthens the emergency protection level step by step. At the same time, combined with the oxygen mask's 4-segment displacement adjustment mode, it achieves graded protection effects of pre-positioning for mild cases and immediate oxygen supply for severe cases. The overall action linkage is smooth and the reset logic is stable and orderly, effectively improving the ability of people to cope with sudden physical discomfort during blood donation and greatly enhancing the safety and adaptability of the intelligent blood collection chair.

[0052] The above are merely specific embodiments of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention using the concept of the present invention shall constitute an infringement of the protection scope of the present invention.

Claims

1. An intelligent blood collection chair that adapts to vital signs, characterized in that, The blood collection chair includes a seat cushion, leg rest cushion, backrest cushion, oxygen mask, and detection module; The interior beneath the seat cushion forms an accommodating space, and the seat cushion is provided with guide grooves on both sides of the accommodating space. The two guide grooves are mirror images of each other. Each guide groove includes a horizontal section and a vertical section. The vertical section and the horizontal section are connected at the end near the front end of the seat cushion, and the vertical section is vertically oriented. Guide wheels are provided on both sides of the leg support pad. The two guide wheels are respectively fitted into the two guide grooves to form a sliding fit. When the guide wheel moves to the end of the horizontal section away from the vertical section, the leg support pad is embedded in the receiving space. When the guide wheel moves to the upper end of the vertical section, the leg support pad moves to connect with the front end of the seat cushion. The backrest cushion is connected to the rear end of the seat cushion, and the backrest cushion is swayable relative to the seat cushion; An oxygen supply pipe is arranged inside the oxygen mask. The oxygen supply pipe is connected to an oxygen source and has multiple oxygen outlet holes. The oxygen mask is connected above the backrest cushion and swings relative to the backrest cushion until the oxygen supply pipe is in front of the headrest of the backrest cushion. The detection module is used to collect the physiological signs of blood donors. When the detection module detects abnormal signs of blood donors, the guide wheel of the leg support moves along the guide groove to the upper end of the vertical section, the backrest cushion swings to a preset angle to form a lying position, and the oxygen mask swings in conjunction with the oxygen supply tube to the position in front of the headrest of the backrest cushion.

2. The blood collection chair as described in claim 1, characterized in that, The detection module collects real-time physiological data of blood donors, including heart rate, blood pressure, and blood oxygen saturation. It compares and analyzes the collected physiological data to identify two types of abnormal conditions: pre-syncope symptoms and risk of shock. Based on the identified abnormal conditions, the detection module can trigger the posture adjustment of the leg rest, backrest, and oxygen mask.

3. The blood collection chair as described in claim 1, characterized in that, The blood collection chair also includes a first drive mechanism disposed within the accommodating space. The first drive mechanism includes a first movable frame, a first transmission shaft, a first gear, and a first rack. The first movable frame is restricted to move linearly relative to the front and rear ends of the seat cushion. A support frame is fixed under the leg rest. Two guide wheels are respectively disposed on both sides of the support frame. The support frame is restricted to move linearly vertically relative to the first movable frame. The first rack is fixed below the first movable frame, the first drive shaft is disposed below the first movable frame and rotates about its own axis, the first gear is fixed to the first drive shaft and the first gear meshes with the first rack, and a drive motor is fixed in the accommodating space, the drive motor drives the first drive shaft to rotate.

4. The blood collection chair as described in claim 1, characterized in that, The blood collection chair also includes a second drive mechanism disposed within the accommodating space. The second drive mechanism includes a second movable frame, a second transmission shaft, a second gear, and a second rack. The second movable frame is restricted to move linearly relative to the front and rear ends of the seat cushion. Linkage rods are fixed on both sides of the second movable frame. Strip holes are provided on both sides below the backrest cushion. The linkage pins of the two linkage rods are respectively adapted to be embedded in the two strip holes to form a slot-hole sliding fit structure. The second rack is fixed to the lower part of the second movable frame, the second drive shaft is arranged below the second movable frame and rotates around its own axis, the second gear is fixed to the second drive shaft and the second gear meshes with the second rack, and a drive motor is fixed in the accommodating space, which drives the second drive shaft to rotate.

5. The blood collection chair as described in claim 4, characterized in that, The blood collection chair also includes a first drive mechanism disposed within the accommodating space. The first drive mechanism includes a first movable frame, a first transmission shaft, a first gear, and a first rack. The first movable frame is restricted to move linearly relative to the front and rear ends of the seat cushion. A support frame is fixed under the leg rest. Two guide wheels are respectively disposed on both sides of the support frame. The support frame is restricted to move linearly vertically relative to the first movable frame. The first rack is fixed to the bottom of the first movable frame, the first drive shaft is disposed below the first movable frame and rotates around its own axis, the first gear is fixed to the first drive shaft and the first gear meshes with the first rack, and the drive motor drives the first drive shaft and the second drive shaft to rotate synchronously.

6. The blood collection chair as described in claim 4 or 5, characterized in that, Both ends of the second rack are connected to engaging members. The engaging members have protruding teeth and are elastically connected to the second rack. When the second moving frame moves, it pushes the strip hole to move through the linkage pin, thereby causing the backrest cushion to flip backward or upward. The second moving frame is at the extreme travel positions at both ends of its moving direction. When the second moving frame is at its limit position at one end of its travel, the teeth of the second gear rotate and push the meshing member to move in the direction of the second rack; When the teeth above the second gear rotate away from the second rack, the rotation of the second gear pushes the second rack to move to the other end of the second moving frame's travel, causing the second moving frame to move and push the strip hole to move, thereby causing the backrest cushion to flip upward.

7. The blood collection chair as described in claim 6, characterized in that, Both ends of the second rack are fixed with connecting ears, and both connecting ears are fixed with guide pins. The axis of the guide pin is parallel to the length direction of the second rack. The end of the guide pin away from the connecting ear is provided with a blocking part with an enlarged diameter. Both ends of the meshing member are provided with guide holes. The two guide holes are respectively adapted to fit the outside of the two guide pins, and springs are sleeved on the outside of the two guide pins. The two ends of the springs respectively abut against the connecting ear and the meshing member. When the second moving frame is at its limit position at one end of its travel, the teeth of the second gear rotate to push the meshing member to move toward the direction of the second rack and compress the spring. After the teeth of the second gear leave the teeth of the meshing member, the elastic force restored by the spring pushes the meshing member to move toward the direction of the blocking part. When the teeth of the second gear on the side closest to the second rack rotate away from the second rack, the teeth of the second gear push the teeth of the meshing member to move, causing the meshing member to abut against the blocking part.

8. The blood collection chair as described in claim 1, characterized in that, The upper end of the backrest cushion is provided with a swing groove that runs through both sides. The swing groove is divided into a straight section and an arc section. One end of the arc section connects to the side of the straight section facing away from the backrest cushion, and the other end of the arc section extends upward towards the front of the backrest cushion. A moving rod and a swing rod are fixed sequentially from top to bottom below the opening of the oxygen mask. Both the moving rod and the swing rod slide through the swing groove. When the moving rod moves along the straight segment to its upper position, it causes the oxygen mask to move upward along the height direction of the backrest cushion. At this time, the swing rod is located at the junction of the straight segment and the arc segment. As the swing arm moves along the arc segment, it causes the oxygen mask to flip downwards toward the front of the backrest cushion.

9. The blood collection chair as described in claim 1, characterized in that, The blood collection chair also includes a third drive mechanism disposed within the backrest cushion. The third drive mechanism includes a first rotating shaft, a push plate, a first connecting rod, and a second connecting rod. The push plate is restricted to slide linearly relative to the upper and lower ends of the backrest cushion, and the side of the push plate facing the swing rod is an inclined guide surface. The lower end of the backrest cushion is fixed to the first rotating shaft. The backrest cushion is embedded in the seat cushion, and the first rotating shaft is restricted to rotate within the seat cushion. The first rotating shaft swings in conjunction with the first connecting rod. The two ends of the second connecting rod are pivotally connected to the first connecting rod and the push plate, respectively. When the backrest cushion flips backward around the first pivot, the first pivot, in conjunction with the first connecting rod, swings towards the back of the backrest cushion, pushing the second connecting rod to move the push plate towards the upper end of the backrest cushion. This causes the guide surface of the push plate to push the moving rod and the swing rod along the straight segment. When the moving rod reaches the upper end of the straight segment, the guide surface pushes the swing rod along the arc segment, causing the oxygen mask to flip downward towards the front of the backrest cushion.

10. The method of operating the blood collection chair as described in claim 1, characterized in that, The method includes the following steps: The detection module continuously collects the physiological signs of blood donors and determines their status in real time. The detection module is configured to: when a fainting precursor is detected, control the backrest cushion to flatten to a first angle and raise the leg rest to a first height. When a risk of shock is detected, the backrest cushion is flattened to the second angle and the leg support cushion is raised to connect with the seat cushion. The second angle is greater than the first angle. Once the detection module determines that the blood donor's physiological signs have returned to normal, the leg support cushion retracts downward and is stored in the accommodating space inside the seat cushion, the backrest cushion swings upward to return to its initial upright posture, and the oxygen mask simultaneously resets and fits onto the backrest cushion.

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