Foldable blood collection chair

Abstract

The embodiment of the utility model provides a kind of foldable blood collection chair, it is related to medical instrument field.The foldable blood collection chair includes: support leg, seat plate, backrest and arm support assembly;The support leg is set to the lower surface of the seat plate, the arm support assembly is connected with the seat plate;The seat plate is connected with the backrest between the backrest by adjusting component, the backrest can rotate relative to the seat plate.By adjusting component control backrest rotates backwards, make backrest gradually incline, until with seat plate substantially in the same plane, to make blood donor transition from sitting posture to lying or close to lying posture, to rest and recover.The adjusting process is stable, continuous, avoids the secondary discomfort caused to blood donor due to posture change too fast.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically a foldable blood collection chair. Background Technology

[0002] In medical institutions, blood collection chairs are medical devices specifically designed for intravenous blood collection and are widely used in hospitals, health check-up centers, and blood donation stations. Existing blood collection chairs typically have a fixed structure and basic seating functions. Some models are equipped with adjustable armrests and backrests to improve patient comfort and ease of operation for medical staff. For example, some electrically adjustable blood collection chairs have height and angle adjustment functions, allowing them to be adjusted according to the patient's height and body type, improving blood collection efficiency and patient experience. In addition, there are multi-functional blood collection chairs designed to transform between a chair and a reclining bed to address potential emergencies such as fainting during blood collection. However, these blood collection chairs still have certain limitations in their structural design and cannot meet the individualized needs of all patients.

[0003] During actual blood collection, some patients may experience discomfort such as fainting or syncope due to anxiety, fear, or physical condition. However, most existing blood collection chairs are fixed structures, lacking the ability to quickly adjust to a lying or semi-reclining position, failing to provide patients with the necessary rest posture in a timely manner, and increasing the risk of falls or injuries. Although some multi-functional blood collection chairs are designed with adjustable backrests and footrests to alleviate the above problems to some extent, their adjustment process is complex and inconvenient to operate, making it difficult to quickly complete posture changes in emergency situations. In addition, although some electrically adjustable blood collection chairs have height and angle adjustment functions, their complex structure and high cost limit their popularization in primary healthcare institutions. Therefore, existing technologies need further improvement to provide a blood collection chair with a simple structure, convenient operation, and the ability to quickly adjust posture to meet the needs of different patients and improve the safety and comfort of the blood collection process. Utility Model Content

[0004] According to an embodiment of this utility model, a foldable blood collection chair is provided to solve the problems mentioned in the background art.

[0005] In a first aspect, a foldable blood collection chair is provided.

[0006] The foldable blood collection chair includes: a support leg, a seat, a backrest, and an arm support assembly; the support leg is disposed on the lower surface of the seat, and the arm support assembly is connected to the seat; the seat and the backrest are connected by an adjustment assembly, and the backrest can rotate relative to the seat.

[0007] Preferably, a headrest is attached to the back of the backrest.

[0008] Preferably, the support leg includes a tube body, an extension rod, a locking bolt, and a foot; the lower end of the tube body is connected to the foot, the extension rod is slidably installed inside the tube body, slots are equidistantly provided on the extension rod, insertion holes are provided on the tube body, the locking bolt passes through the insertion hole and is threadedly connected to the insertion hole, the locking bolt is inserted into the slot, and the upper end of the extension rod is fixedly connected to the seat plate.

[0009] Preferably, the arm support assembly includes a lifting assembly and a support plate, the lifting assembly being fixedly connected to the seat plate, and the support plate being connected to the lifting assembly.

[0010] Preferably, the lifting assembly includes a storage shell, an extension plate, a plug, a pull rope, a winding shaft, a guide rod, a connecting rod, and a spring; the storage shell is fixedly connected to the seat plate, and the storage shell has a retaining tooth inside; the plug has a guide slope, and the plug engages with the retaining tooth; the extension plate has an L-shaped mounting cavity inside, the plug extends into the mounting cavity and is slidably connected to the mounting cavity; the connecting rod is fixedly connected to the plug; the spring is sleeved on the connecting rod, one end of the spring is fixedly connected to the mounting cavity, and the other end of the spring is connected to the plug; one end of the pull rope is fixedly connected to the connecting rod; the guide rod is fixedly installed in the mounting cavity; the winding shaft extends into the mounting cavity and is rotatably connected to the extension plate; and the pull rope is fixedly connected to the winding shaft.

[0011] Preferably, the support plate is rotatably connected to the extension plate, the extension plate is provided with a limiting part, and the support plate is in contact with the limiting part.

[0012] Preferably, the support plate is provided with a forearm bracket and an upper arm bracket, and heating pads are respectively provided on the forearm bracket and the upper arm bracket.

[0013] Preferably, the adjustment assembly includes two housings, a rotating shaft, two ratchet wheels, two pawls, a lever, and a connecting shaft; the two housings are fixedly connected to the seat plate, the rotating shaft is rotatably mounted between the two housings, and both ends of the rotating shaft extend into the interior of the housings respectively, the ratchet wheels are fixedly connected to the rotating shaft, the connecting shaft is rotatably mounted between the two housings, and both ends of the connecting shaft extend into the housings respectively, the two pawls are fixedly connected to the connecting shaft respectively, a torsion spring is sleeved on the connecting shaft, one end of the torsion spring is connected to the pawl, the other end of the torsion spring is connected to the inner wall of the housing, and the lever is fixedly connected to the pawl.

[0014] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0015] This utility model provides a foldable blood collection chair. When the person being blood-collected experiences symptoms such as fainting at the sight of blood or general discomfort, the backrest can be adjusted to rotate backward via an adjustable component, gradually tilting until it is essentially flush with the seat. This allows the person to transition from a sitting to a lying or near-lying position for rest and recovery. The adjustment process is smooth and continuous, avoiding secondary discomfort caused by rapid changes in posture.

[0016] Furthermore, to facilitate the carrying and storage of the blood collection chair, the backrest is designed with a foldable structure. When not in use, the backrest can be rotated forward using an adjustment mechanism, so that its front surface adheres to the upper surface of the seat, thereby folding the blood collection chair into a compact form for easy carrying and storage. This folding process is simple and quick, requiring no complicated operations, thus enhancing the portability and practicality of the blood collection chair.

[0017] It should be understood that the description in this utility model description section is not intended to limit the key or essential features of the embodiments of this utility model, nor is it intended to restrict the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0018] The above and other features, advantages, and aspects of the various embodiments of the present invention will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:

[0019] Figure 1 A three-dimensional structural schematic diagram of a foldable blood collection chair according to an embodiment of the present invention is shown;

[0020] Figure 2 An exploded view of a foldable blood collection chair according to an embodiment of the present invention is shown.

[0021] Figure 3 A schematic diagram of the connection structure of the adjustment assembly and backrest of a foldable blood collection chair according to an embodiment of the present invention is shown.

[0022] Figure 4 A perspective structural schematic diagram of the adjustment assembly of a foldable blood collection chair according to an embodiment of the present invention is shown;

[0023] Figure 5 A perspective view of the arm support assembly of a foldable blood collection chair according to an embodiment of the present invention is shown.

[0024] Figure 6 A cross-sectional view of the arm support assembly of a foldable blood collection chair according to an embodiment of the present invention is shown.

[0025] Tag name

[0026] 1-Support leg, 11-Tube body, 111-Insertion hole, 12-Extension rod, 121-Slot, 13-Bolt, 14-Outrigger, 2-Seat plate, 3-Backrest, 31-Headrest, 4-Arm support assembly, 41-Lifting assembly, 411-Storage shell, 4111-Clamping tooth, 412-Extension plate, 4121-Mounting cavity, 4122-Limiting part, 413-Insertion block, 414-Pull rope, 415-Rewinding shaft, 416-Guide rod, 417-Connecting rod, 418-Spring, 42-Support plate, 421-Forearm bracket, 422-Uparm bracket, 423-Heating pad, 5-Adjustment assembly, 51-Shell, 52-Rotating shaft, 53-Ratchet, 54-Pawl, 55-Lever, 56-Connecting shaft, 57-Torsion spring. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] Furthermore, the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0029] like Figures 1 to 6 As shown, this embodiment provides a foldable blood collection chair, including: a support leg 1, a seat 2, a backrest 3, an arm support assembly 4, and an adjustment assembly 5. The support leg 1 is located on the lower surface of the seat 2 and supports the weight of the entire blood collection chair, ensuring its stability during use. The seat 2 is the main load-bearing component for the person being blood collected to sit or lie down; its front end is connected to the arm support assembly 4, which supports the person's arm, facilitating blood collection operations for medical personnel.

[0030] The rear end of the seat 2 is connected to the backrest 3 via an adjustment component 5, which allows the backrest 3 to be rotated relative to the seat 2. This adjustment component 5 can be a hinge structure, a pivot structure, or other rotatable connection structure, allowing the backrest 3 to rotate relative to the seat 2 within a certain angle range to achieve different backrest tilt angles. Under normal use, the backrest 3 and the seat 2 form a certain angle, allowing the person being drawn to rest against the backrest 3 in a sitting or semi-reclining position.

[0031] During blood collection, the person being drawn sits on the seat 2, with their back against the backrest 3 and their arms resting on the arm support component 4, so that medical staff can perform the blood collection procedure. If the person being drawn experiences symptoms such as fainting at the sight of blood or feeling unwell, the backrest 3 can be rotated backward using the adjustment component 5, gradually tilting it until it is roughly on the same plane as the seat 2. This allows the person being drawn to transition from a sitting position to a lying or near-lying position, providing them with rest and recovery. This adjustment process is smooth and continuous, avoiding secondary discomfort caused to the person being drawn due to rapid changes in posture.

[0032] Furthermore, to facilitate the carrying and storage of the blood collection chair, the backrest 3 is designed with a foldable structure. When not in use, the backrest 3 can be rotated forward using the adjusting component 5, so that its front surface adheres to the upper surface of the seat 2, thereby folding the blood collection chair into a compact form for easy carrying and storage. This folding process is simple and quick, requiring no complicated operations, thus improving the portability and practicality of the blood collection chair.

[0033] In this embodiment, a headrest 31 is connected to the back of the backrest 3. The headrest 31 is used to support the head of the person being blood-collected, providing additional comfort and stability. When the backrest 3 is in an inclined or lying position, the headrest 31 can effectively support the head of the person being blood-collected, reduce neck pressure, and improve the rest effect.

[0034] In this embodiment, the support leg 1 includes a tube 11, an extension rod 12, a locking bolt 13, and a foot 14. The tube 11 is a hollow structure, with the foot 14 fixedly connected to its lower end. The foot 14 is used to contact the ground and provide stable support. The extension rod 12 is a solid or hollow rod, with its upper end fixedly connected to the lower surface of the seat plate 2, and its lower end slidably inserted into the tube 11 to achieve height adjustment.

[0035] To achieve height adjustability, multiple slots 121 are equidistantly spaced along the axial direction on the outer surface of the extension rod 12. The number and spacing of the slots 121 can be set according to actual needs. Insertion holes 111 are provided on the side wall of the tube body 11, and the size of the insertion holes 111 matches the slots 121. Locking bolts 13 pass through the insertion holes 111 and are threaded into them; their front ends can be inserted into the corresponding slots 121, thereby achieving positioning and locking of the extension rod 12.

[0036] In practical use, if the height of the blood collection chair needs to be adjusted, first loosen or remove the locking bolt 13 to disengage it from the slot 121. Then, manually raise or lower the seat plate 2, causing the extension rod 12 to slide within the tube 11 until the slot 121 aligns with the insertion hole 111. At this point, retighten the locking bolt 13 so that its front end is inserted into the slot 121 and secured by the threaded connection, thereby locking the extension rod 12 and completing the height adjustment process.

[0037] In this embodiment, the arm support assembly 4 includes a lifting assembly 41 and a support plate 42. The lifting assembly 41 is fixedly connected to the seat plate 2, and the support plate 42 is connected to the lifting assembly 41, for supporting the arm of the person being blood-collected.

[0038] The lifting assembly 41 includes a storage shell 411, an extension plate 412, an insert block 413, a pull rope 414, a winding shaft 415, a guide rod 416, a connecting rod 417, and a spring 418. The storage shell 411 is a hollow structure, its bottom fixedly connected to the seat plate 2, and has multiple vertically arranged locking teeth 4111 inside. The extension plate 412 is a telescopic structure, its lower end inserted into the storage shell 411, and has an L-shaped mounting cavity 4121 inside.

[0039] The insert block 413 is provided with a guide slope, located within the mounting cavity 4121, and slidably connected to the mounting cavity 4121. The insert block 413 engages with the locking teeth 4111 through its guide slope to achieve positioning and locking of the extension plate 412. One end of the connecting rod 417 is fixedly connected to the insert block 413, and the other end is fitted with a spring 418. One end of the spring 418 is fixedly connected to the mounting cavity 4121, and the other end is connected to the insert block 413. The force of the spring 418 causes the insert block 413 to insert between adjacent locking teeth 4111, achieving a self-locking function.

[0040] One end of the pull rope 414 is fixedly connected to the connecting rod 417, and the other end passes over the guide rod 416 and is fixedly connected to the take-up shaft 415. The take-up shaft 415 extends into the mounting cavity 4121 and is rotatably connected to the extension plate 412.

[0041] In practical use, if the height of the support plate 42 needs to be adjusted, the operator pulls the extension plate 412 upwards. The extension plate 412 moves upwards relative to the housing 411, and the insert block 413, under the cooperation of the guide slope and the locking teeth 4111, reciprocates back into the mounting cavity 4121. When the extension plate 412 extends to the appropriate height, the pulling stops, and the insert block 413, under the action of the spring 418, inserts into the gap between the adjacent locking teeth 4111 to achieve locking.

[0042] To retract the extension plate 412 into the storage housing 411, the operator rotates the winding shaft 415. The winding shaft 415 winds up the pull rope 414, which in turn pulls the connecting rod 417. The connecting rod 417 then retracts the insert block 413 into the mounting cavity 4121, releasing the lock on the extension plate 412. The operator can then retract the extension plate 412 into the storage housing 411.

[0043] In this embodiment, the support plate 42 is rotatably connected to the extension plate 412. The extension plate 412 is provided with a limiting part 4122. The support plate 42 contacts the limiting part 4122. When the support plate 42 contacts the limiting part 4122, the support plate 42 is parallel to the seat plate 2.

[0044] In this embodiment, the upper surface of the support plate 42 is provided with a forearm support 421 and an upper arm support 422, which are used to support the forearm and upper arm of the person being blood-collected, respectively. The structural design of the forearm support 421 and the upper arm support 422 conforms to the ergonomic principle, which can effectively distribute the pressure on the arm and improve the comfort of the person being blood-collected during the blood collection process.

[0045] Heating pads 423 are respectively installed on the forearm support 421 and the upper arm support 422 for heating the arm of the person having blood drawn. The heating pads 423 are tightly attached to the surface of the support through a thermally conductive material, ensuring that heat is evenly conducted to the arm of the person having blood drawn. The temperature control system of the heating pads 423 can automatically adjust the heating power according to the set temperature parameters to maintain a constant heating temperature and prevent overheating or overcooling.

[0046] In practical use, the heating function of the heating pad 423 helps promote blood circulation in the arm of the person having their blood drawn, causing blood vessels to dilate and improving the success rate of blood collection. At the same time, the heating function can also relieve discomfort caused by tension or cold in the person having their blood drawn, improving the comfort and smoothness of the blood collection process.

[0047] In this embodiment, the adjustment component 5 is used to realize the angle adjustment of the backrest 3 relative to the seat 2 and the one-way locking function. Its structure includes two housings 51, a rotating shaft 52, two ratchet wheels 53, two pawls 54, a lever 55, a connecting shaft 56, and a torsion spring 57.

[0048] Two housings 51 are fixedly mounted on both sides of the seat plate 2 to house and support components such as the rotating shaft 52, ratchet 53, pawl 54, and connecting shaft 56. The rotating shaft 52 is arranged laterally, with both ends passing through the housing 51 and extending into the housing, where it is fixedly connected to the two ratchet 53 to form an integral structure. The outer circumferential surface of the ratchet 53 is provided with multiple ratchet teeth for engaging with the pawl 54 to achieve graded angle adjustment and locking.

[0049] The connecting shaft 56 is arranged parallel to the rotating shaft 52, with both ends extending into the housing 51 and fixedly connected to two pawls 54. The pawls 54 are rotatably arranged around the connecting shaft 56, with one end having a meshing part for engaging the ratchet teeth of the ratchet wheel 53, and the other end being fixedly connected to the lever 55. The lever 55 extends out of the housing 51 for easy manual operation by the operator.

[0050] The torsion spring 57 is sleeved on the connecting shaft 56. One end of the spring is connected to the pawl 54, and the other end is fixedly connected to the inner wall of the housing 51. It is used to apply torsional force to the pawl 54 so that it always remains engaged with the ratchet 53.

[0051] During use, when the angle of the backrest 3 needs to be adjusted, the operator moves the lever 55 upwards. The lever 55 drives the pawl 54 to rotate around the connecting shaft 56, causing the engaging part of the pawl 54 to disengage from the ratchet teeth of the ratchet wheel 53, thus releasing the locking state. At this time, the backrest 3 rotates around the rotation axis 52 under the action of external force, realizing the angle adjustment. After adjusting to the appropriate angle, the lever 55 is released. Under the action of the torsion spring 57, the pawl 54 automatically resets, and its engaging part re-engages with the ratchet teeth of the ratchet wheel 53, realizing the one-way locking of the backrest 3. This adjustment component 5 has a reasonable structural design, is easy to operate, and can realize multi-position adjustment of the backrest 3 angle and reliable locking, improving the applicability and comfort of the blood collection chair. At the same time, this structure has good stability and durability, making it suitable for application in high-frequency use scenarios such as medical settings.

[0052] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A foldable blood collection chair, characterized in that, include: The support leg (1), seat (2), backrest (3), arm support assembly (4), and adjustment assembly (5) are provided; the support leg (1) is disposed on the lower surface of the seat (2), and the arm support assembly (4) is connected to the seat (2); the seat (2) and the backrest (3) are connected by the adjustment assembly (5), and the backrest (3) can rotate relative to the seat (2); The arm support assembly (4) includes a lifting assembly (41) and a support plate (42). The lifting assembly (41) is fixedly connected to the seat plate (2), and the support plate (42) is connected to the lifting assembly (41). The lifting assembly (41) includes a storage shell (411), an extension plate (412), a plug (413), a pull rope (414), a winding shaft (415), a guide rod (416), a connecting rod (417), and a spring (418). The storage shell (411) is fixedly connected to the seat plate (2). The storage shell (411) has a retaining tooth (4111) inside. The plug (413) has a guide slope and is engaged with the retaining tooth (4111). The extension plate (412) has an installation cavity (4121) inside. The installation cavity (4121) is L-shaped. The plug (413) extends into the installation cavity (4121) and is connected with the seat plate (2). The mounting cavity (4121) is slidably connected, the connecting rod (417) is fixedly connected to the insert block (413), the spring (418) is sleeved on the connecting rod (417), one end of the spring (418) is fixedly connected to the mounting cavity (4121), the other end of the spring (418) is connected to the insert block (413), one end of the pull rope (414) is fixedly connected to the connecting rod (417), the guide rod (416) is fixedly installed in the mounting cavity (4121), the winding shaft (415) extends into the mounting cavity (4121) and is rotatably connected to the extension plate (412), and the pull rope (414) is fixedly connected to the winding shaft (415). The support plate (42) is provided with a forearm support (421) and a boom support (422), and heating pads (423) are respectively provided on the forearm support (421) and the boom support (422). The adjustment assembly (5) includes two housings (51), a rotating shaft (52), two ratchet wheels (53), two pawls (54), a lever (55), and a connecting shaft (56); the two housings (51) are fixedly connected to the seat plate (2), the rotating shaft (52) is rotatably mounted between the two housings (51), and both ends of the rotating shaft (52) extend into the interior of the housings (51), the ratchet wheels (53) are fixedly connected to the rotating shaft (52), and the connecting shaft (56)... The shaft (56) is rotatably mounted between the two housings (51). Both ends of the connecting shaft (56) extend into the housings (51) respectively. The two pawls (54) are fixedly connected to the connecting shaft (56) respectively. A torsion spring (57) is sleeved on the connecting shaft (56). One end of the torsion spring (57) is connected to the pawl (54), and the other end of the torsion spring (57) is connected to the inner wall of the housing (51). The lever (55) is fixedly connected to the pawl (54).

2. The foldable blood collection chair according to claim 1, characterized in that, The backrest (3) is connected to a headrest (31) on its back side.

3. The foldable blood collection chair according to claim 1, characterized in that, The support leg (1) includes a tube body (11), an extension rod (12), a locking bolt (13), and a foot (14); the lower end of the tube body (11) is connected to the foot (14), the extension rod (12) is slidably installed inside the tube body (11), slots (121) are provided at equal intervals on the extension rod (12), and insertion holes (111) are provided on the tube body (11). The locking bolt (13) passes through the insertion hole (111) and is threadedly connected to the insertion hole (111). The locking bolt (13) is inserted into the slot (121), and the upper end of the extension rod (12) is fixedly connected to the seat plate (2).

4. The foldable blood collection chair according to claim 1, characterized in that, The support plate (42) is rotatably connected to the extension plate (412), and a limiting part (4122) is provided on the extension plate (412). The support plate (42) contacts the limiting part (4122).

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