Fixing device, aeromedical evacuation unit and medical airplane

Abstract

The present application relates to a fixing device for fixing a negative pressure isolation cabin to a medical bed body, and comprises: an isolation cabin lock comprising a lock body fixed to the negative pressure isolation cabin, a lock slot arranged on the lock body and a latch device extending at least partially into the lock slot, and a fixed lock mouth comprising a lock seat and a lock ring extending from the lock seat, wherein the lock seat is fixed to the medical bed body, and the lock ring is fitted into the lock slot in the vertical direction, and the fixing device is switched between a locked state and an unlocked state by means of the latch device, in the locked state, the negative pressure isolation cabin is fixed to the medical bed body, and in the unlocked state, the negative pressure isolation cabin is allowed to move relative to the medical bed body. The device can quickly and reliably fix the negative pressure isolation cabin to the medical bed body or release it from the medical bed body, the operation is simple, fast, no special tools are needed, and the reliability is high. In addition, the present application also relates to an air ambulance unit and a medical aircraft comprising such a fixing device.

Description

Technical Field

[0001] This invention belongs to the field of aero-medical equipment and relates to a fixation device for securing a negative pressure isolation chamber to an aircraft bed or other bed. Furthermore, this invention also relates to an air ambulance unit and a medical aircraft incorporating such a fixation device. Background Technology

[0002] Negative pressure isolation chambers are an effective way to isolate infectious patients and are widely used in the medical field. Given the development of civil aircraft and the need to transport patients during outbreaks, negative pressure isolation chambers responsible for transporting these patients need to be quickly and reliably connected to and secured to beds (such as medical beds) mounted on the aircraft.

[0003] In the invention patent application CN114291269A, entitled "A Negative Pressure Isolation System for a Vehicle Cabin," filed by the applicant of this application and published on April 8, 2022, a negative pressure isolation chamber is disclosed, including an air supply subsystem and an exhaust subsystem. Gas enters the negative pressure gas collection box 30 through the upper air inlet 11 and is finally discharged through the exhaust pipe 31. It can be used in various vehicles. This application does not disclose the method of fixing the negative pressure isolation chamber to a medical bed or aircraft.

[0004] A utility model patent entitled "A Negative Pressure Isolation Bed," published on October 27, 2020, with publication number CN211750596U, discloses a negative pressure isolation bed, including a bed body 1, a negative pressure isolation chamber 2, an air pump 4, a disinfection device 6, and an air filter 7. During operation, the air pump 4 draws gas from the negative pressure isolation chamber 2, which is then disinfected by the disinfection device 6 before being discharged. However, this negative pressure isolation bed is not suitable for aviation medical use and does not include a fixation device for rapid immobilization.

[0005] In an invention patent application submitted by Jiangxi Jiangling Motors Group Modified Vehicle Co., Ltd. and published on February 19, 2021, with publication number CN112370252A and titled "A Negative Pressure Isolation Stretcher," a negative pressure isolation stretcher is disclosed, comprising a stretcher body 200 and a negative pressure isolation device 100. During operation, the patient is laid flat on the stretcher body 200, and the patient's head can be covered by a roller blind assembly 120. The negative pressure isolation device only covers the patient's head, allowing for convenient manipulation of the body. The negative pressure isolation device is fixed to the stretcher with bolts. In this application, the negative pressure isolation chamber is fixed to the stretcher with bolts, making loading and unloading inconvenient and preventing quick locking and unlocking.

[0006] Otis Elevator Inc.'s patent application CN203439889U, published on February 19, 2014, entitled "A Quick-Fixing Device for a Passenger Conveyor Belt," discloses a quick-fixing device including a connector 4 and a latch 5. During fixing, the connector 4 is pressed downwards, and due to the angled fit and elastic force, it enters the latch 5. During unlocking, the connector 4 is pulled outwards to unlock. However, this fixing device only relates to one quick-fixing method, has a relatively low load-bearing capacity, and lacks sufficient control over unlocking, making it unsuitable for negative pressure isolation chambers.

[0007] Therefore, there is an urgent need to optimize the structure of the fixation devices in the prior art in order to provide an improved fixation device that allows for rapid locking and unlocking of the negative pressure isolation chamber and the medical bed, which can overcome one or more of the disadvantages of the prior art. Summary of the Invention

[0008] The purpose of this invention is to provide a fixation device, which is a rapid fixation device for connecting and fixing a negative pressure isolation chamber to an aviation medical bed. It features rapid fixation or release, simple operation, and high reliability. It is suitable for the rapid transfer and fixation of negative pressure isolation chambers during patient transport, especially when transported by aircraft such as medical aircraft.

[0009] According to one aspect of the invention, a fixation device is provided for fixing a negative pressure isolation chamber to a medical bed, and may include:

[0010] An isolation chamber lock may include a lock body fixed to a negative pressure isolation chamber, a lock groove disposed on the lock body, and a latching device extending at least partially into the lock groove.

[0011] The fixed locking mechanism may include a lock seat and a locking ring extending from the lock seat, wherein the lock seat is fixed to the medical bed body, and the locking ring is engaged in a lock groove in the vertical direction, and the fixing device is switched between a locked state and an unlocked state by means of a latching device. In the locked state, the negative pressure isolation chamber is fixed to the medical bed body, while in the unlocked state, the negative pressure isolation chamber is allowed to move relative to the medical bed body.

[0012] This method allows for the rapid and reliable attachment and release of the negative pressure isolation chamber to the medical bed. It is simple, quick, and requires no special tools during attachment and release. It is also highly reliable and has excellent effectiveness in transporting patients who need rapid isolation due to epidemics or other reasons.

[0013] According to the above aspects of the invention, preferably, in the locked state, the locking groove and the locking ring can be coordinated to restrict movement of the locking groove relative to the locking ring within the mounting surface defined by the lateral and longitudinal directions. This arrangement allows for restriction of movement of the negative pressure isolation chamber relative to the medical bed within the mounting plane or horizontal plane.

[0014] According to the above aspects of the invention, preferably, the locking ring may include a first leg, a second leg extending from the lock seat, and a crossbeam extending between the first leg and the second leg, wherein the first leg and the second leg taper from the lock seat toward the crossbeam. This tapering structure provides a guiding function to the locking ring, thus allowing it to be easily fitted into the locking groove, thereby enabling the negative pressure isolation chamber to be quickly and reliably secured to the medical bed.

[0015] According to the above aspects of the invention, preferably, the latching device may include a handle and a latch fixed to the handle, wherein the latch is actuated by the handle to extend and retract relative to a locking groove, and wherein, in the locked state, the latch extends relative to the locking groove, and in the unlocked state, the latch retracts relative to the locking groove. This arrangement further increases the reliability of locking, particularly in restraining the movement of the negative pressure isolation chamber relative to the medical bed in the vertical direction, and the locking and unlocking operations are convenient and quick.

[0016] According to the above aspects of the invention, preferably, the latching device may further include a connecting rod extending between the handle and the bolt, and an elastic member arranged along the connecting rod, wherein the elastic member is disposed between the lock body and the bolt and biases the bolt to extend relative to the lock groove, or in other words, biased towards the lock groove. This arrangement further improves the automation of the locking process and ensures that the negative pressure isolation chamber is not accidentally released from the medical bed, particularly in the vertical direction.

[0017] According to the above aspects of the invention, preferably, the lower surface of the latch may include a tapering slope toward the end of the latch, while the crossbeam of the locking ring may include an arc-shaped upper surface. This arrangement facilitates automatic locking of the latching device during the securing and locking of the isolation chamber to the medical bed, eliminating the need for additional manual operation of the latching device, and in particular, eliminating the need for separate actuation of the latch.

[0018] According to the above aspects of the present invention, preferably, the fixing device may further include a guide rail fixed to the bottom of the negative pressure isolation chamber, wherein the guide rail is provided with a guide groove and a position adjusting fastener, the locking end of the position adjusting fastener being locked in the guide groove in the vertical direction and being movable along the longitudinal direction of the guide groove, wherein the position adjusting fastener passes through a mounting hole on the isolation chamber lock to fix the isolation chamber lock to the guide rail.

[0019] This arrangement facilitates the fixing of the isolation chamber lock to the negative pressure isolation chamber and allows for adjustment of the position of the isolation chamber lock relative to the bottom part of the negative pressure isolation chamber to suit different structures and geometries of negative pressure isolation chambers.

[0020] According to the above aspects of the present invention, preferably, the lock body may include a gripping portion disposed opposite to the lock groove, and having a receiving space for accommodating the movement of the handle. This arrangement facilitates gripping and lifting of the negative pressure isolation chamber while unlocking, further improving operational efficiency.

[0021] According to another aspect of the present invention, an air ambulance unit is provided, which may include a negative pressure isolation chamber and a medical bed, the negative pressure isolation chamber and the medical bed being detachably fixed together via a fixing device as described above. In this air ambulance unit, the negative pressure isolation chamber and the medical bed can be quickly and reliably connected and fixed, and simultaneously locked or unlocked to each other, solving the technical problem of how to quickly fix and lock the negative pressure isolation chamber on the medical bed during air transport.

[0022] According to the above aspects of the present invention, preferably, in order to increase the structural strength and reliability of locking the negative pressure isolation chamber to the medical bed and to facilitate the lifting or lowering of the negative pressure isolation chamber, four fixing devices may be provided, and arranged symmetrically in pairs about the medical bed within the mounting surface, particularly symmetrically in pairs along the transverse and longitudinal directions. Furthermore, this arrangement also helps to allow the operator to apply force evenly when lifting the negative pressure isolation chamber.

[0023] According to another aspect of the present invention, a medical aircraft comprising the air ambulance unit described above is proposed, wherein a medical bed is fixedly connected to the fuselage of the medical aircraft.

[0024] The beneficial technical effects of the fixing device according to the present invention may include, but are not limited to, the following aspects:

[0025] 1) By aligning the locking groove of the lock body fixed to the negative pressure isolation chamber with the locking ring (which is fixed to the medical bed) and sliding it downwards, the locking ring, due to its specific structural form (e.g., a truncated cone shape), acts as a guide. During the downward sliding of the locking groove, the locking tongue retracts due to the interaction between the locking tongue and the locking ring. When the locking tongue descends into the hollow area of ​​the locking ring, it extends relative to the locking groove (e.g., by means of a spring-loaded member), thus fixing the negative pressure isolation chamber and the medical bed in the vertical direction and maintaining mutual locking.

[0026] In addition, because the lock groove and the lower (or base) structure of the lock ring are in a small clearance fit, the negative pressure isolation chamber is kept horizontally fixed relative to the medical bed and will not move in the lateral or longitudinal direction.

[0027] 2) By pulling the handle of the isolation chamber lock fixed to the negative pressure isolation chamber outward, the locking tongue retracts into the lock body, thereby releasing the vertical (or vertical) fixation between the negative pressure isolation chamber and the medical bed. At this time, the negative pressure isolation chamber can be lifted so that the lock groove of the lock body passes over the lock ring, thereby releasing the horizontal fixation of the negative pressure isolation chamber relative to the medical bed, allowing the negative pressure isolation chamber to be unlocked from the medical bed.

[0028] Therefore, the fixing device of the present invention can meet the usage requirements, overcome the shortcomings of the prior art, and achieve the intended purpose. Attached Figure Description

[0029] To further describe the fixing device according to the present invention clearly, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, in which:

[0030] Figure 1 A schematic perspective view of an air ambulance unit according to a non-limiting embodiment of the present invention is shown, wherein a negative pressure isolation chamber has been fixed to a medical bed.

[0031] Figure 2 yes Figure 1 The diagram shows a portion of an air ambulance unit, in which the negative pressure isolation chamber has been released from the medical bed.

[0032] Figure 3 A schematic perspective view of a fixing device according to a non-limiting embodiment of the present invention is shown, wherein the fixing device is in a locked state;

[0033] Figure 4 A schematic perspective view of a fixing device according to a non-limiting embodiment of the present invention is shown, wherein the fixing device is in an unlocked state;

[0034] Figure 5 Another schematic perspective view of a fixing device according to a non-limiting embodiment of the present invention is shown, wherein the fixing device is in a locked state;

[0035] Figure 6 It shows Figure 5 The fixing device shown is not shown with a fixing lock.

[0036] Figure 7 yes Figure 6 The bottom view of the fixing device shown;

[0037] Figure 8This is a schematic perspective view of the fixing lock of the fixing device according to the present invention; and

[0038] Figure 9 This is a schematic bottom view of a negative pressure isolation chamber according to a non-limiting embodiment of the present invention. The above figures are merely schematic and not drawn to scale. Reference numerals in the figures are listed in the figures and embodiments: 1000 - Air ambulance unit, comprising:

[0039] 100 - Fixture, comprising:

[0040] 10-Isolation chamber lock, including:

[0041] 11-Lock body, including:

[0042] 11A - Holding part;

[0043] 11B-concave part;

[0044] 12-Lock slot;

[0045] 12A - Side opening;

[0046] 13-Latching device, comprising:

[0047] 131 - Handle;

[0048] 132-Lock tongue;

[0049] 132A - Tip;

[0050] 133 - Connecting rod;

[0051] 134 - Elastic component;

[0052] 20-Fixed lock, including:

[0053] 21-Lock base;

[0054] 22-Locking ring, including:

[0055] 22A - First leg;

[0056] 22B - Second leg;

[0057] 22C - Crossbeam;

[0058] 30-Guide rail, including:

[0059] 31-Guide groove;

[0060] 32 - Adjusting fasteners;

[0061] 33-Fixing hole;

[0062] 34-Wing nut;

[0063] 200-Negative Pressure Isolation Chamber;

[0064] 300-Medical Beds;

[0065] X - Lateral direction;

[0066] Y - Vertical direction;

[0067] Z - Vertical direction. Detailed Implementation

[0068] It should be understood that, unless explicitly stated otherwise, the invention may employ various alternative orientations and sequences of steps. It should also be understood that the specific apparatus shown in the drawings and described in the specification are merely exemplary embodiments of the inventive concept disclosed and defined herein. Therefore, unless expressly stated otherwise, the specific orientations, directions, or other physical features involved in the various disclosed embodiments should not be considered limiting.

[0069] Figure 1 A schematic perspective view of an air ambulance unit 1000 according to a non-limiting embodiment of the present invention is shown, while Figure 2 yes Figure 1 A schematic diagram of a portion of the air ambulance unit 1000 shown.

[0070] As shown in the figure and as a non-limiting embodiment, the air ambulance unit 1000 may include a negative pressure isolation chamber 200 and a medical bed 300, wherein the negative pressure isolation chamber 200 can be fixed to the medical bed 300 via a fixing device 100, for example, by means of the fixing device 100 to detachably fix the negative pressure isolation chamber 200 to the medical bed 300, particularly allowing for quick, reliable and detachable fixing to the medical bed 300. Figure 1 The view shows that the negative pressure isolation chamber 200 has been fixed to the medical bed 300, while... Figure 2 In the view, the negative pressure isolation chamber 200 has been released from the medical bed 300.

[0071] The negative pressure isolation chamber 200 is an effective way to isolate infectious patients. It may include an air supply subsystem, an exhaust subsystem, etc., and may have, for example, the corresponding structures disclosed in patent documents CN114291269A and CN211750596U disclosed in the background section of this application.

[0072] The medical bed 300 can be fixedly connected to a fixed structure such as the fuselage of a transport vehicle, such as a medical aircraft. The medical bed 300 may include various beds, stretchers, platforms, and other structures for carrying patients.

[0073] The negative pressure isolation chamber 200 and the medical bed 300 can have substantially corresponding geometries, and their internal dimensions can be adapted to accommodate the external dimensions of persons awaiting treatment or isolation. In the illustrated embodiment, the negative pressure isolation chamber 200 has a generally cuboid shape, while the medical bed 300 is formed as a generally rectangular plate.

[0074] exist Figure 1 as well as Figure 3-4 A coordinate system is provided for reference. In one example, the axis labeled Z may refer to the vertical direction (e.g., parallel to the gravity axis), the axis labeled X may refer to the lateral direction (e.g., parallel to the horizontal axis), and / or the axis labeled Y may refer to the longitudinal direction, and the lateral direction X and the longitudinal direction Y may define a mounting surface XY, which may be a horizontal plane that is substantially perpendicular to the vertical direction Z. However, in other examples, these axes may have other orientations.

[0075] Multiple fixing devices 100 can be arranged in the mounting plane. Figure 1 and 2 In the embodiment shown, four fixing devices 100 may be provided, and they are arranged symmetrically in pairs in the transverse direction X and longitudinal direction Y about the medical bed body 300 on the mounting surface.

[0076] Figure 3 A schematic perspective view of a fixing device 100 according to a non-limiting embodiment of the present invention is shown, wherein the fixing device 100 is in a locked state; Figure 4 A schematic perspective view of a fixing device 100 according to a non-limiting embodiment of the present invention is shown, wherein the fixing device 100 is in an unlocked state; Figure 5 Another schematic perspective view of a fixing device 100 according to a non-limiting embodiment of the present invention is shown, wherein the fixing device 100 is in a locked state; and Figure 6 It shows Figure 5 Part of the fixing device 100 shown.

[0077] As shown in the figure and as a non-limiting embodiment of the present invention, the fixing device 100 may mainly include an isolation chamber lock 10 and a fixing lock 20.

[0078] The isolation chamber lock 10 can be fixed to the negative pressure isolation chamber 200, and can mainly include components such as lock body 11, lock groove 12 and latching device 13.

[0079] In the embodiment shown in the accompanying drawings, the isolation chamber lock 10 is generally rectangular in shape, and the lock body 11 can be fixed to the negative pressure isolation chamber 200, for example by means of the guide rail 30, adjusting fastener 32 or similar structure described in detail below. Of course, the lock body 11 can also be directly fixed to the negative pressure isolation chamber 200, for example, fixed to its base portion.

[0080] The lock groove 12 can be arranged on the lock body 11 or, in other words, extend from the lock body 11, for example, fixed together with the lock body 11 or integrally formed therefrom. As shown in the figure, the lock groove 12 can be formed into a generally rectangular through groove.

[0081] Additionally, in the embodiment shown in the accompanying drawings, the lock body 11 may include a grip portion 11A. The grip portion 11A is disposed opposite to the lock groove 12 (e.g., opposite to each other with respect to the lateral direction X), and the grip portion 11A encloses or has a generally rectangular receiving space that allows the handle 131, which is described in detail below, to reciprocate therein, and facilitates the gripping and operation of the handle 131 by the operator.

[0082] The latching device 13 can be supported by the lock body 11 and can extend at least partially into the lock groove 12. For example... Figure 6 As shown in detail, the latching device 13 may primarily include a handle 131 and a latch 132 fixed to the handle 131, the handle 131 and the latch 132 being arranged opposite to each other (e.g., opposite to each other with respect to the lateral direction X). The latch 132 is actuated by the handle 131 to extend and retract relative to the lock groove 12. In the locked state, the latch 132 extends relative to the lock groove 12 (see...). Figure 3 as well as Figure 5-7 In the unlocked state, the bolt 132 retracts relative to the lock slot 12 (see...). Figure 4 ).

[0083] A connecting rod 133 extending therebetween the handle 131 and the latch 132, along with an elastic member 134 arranged along the connecting rod 133, may be provided. The connecting rod 133 may be a portion extending from the handle 131 or the latch 132, or integrally formed with one or both. Alternatively, the handle 131, the latch 132, and the connecting rod 133 may be formed as a single piece. In the embodiment shown in the figures, the connecting rod 133 is formed as an elongated rod that passes through a through hole provided in the lock body 11 and is capable of reciprocating along the lateral direction X.

[0084] The elastic member 134 may be, for example, in the form of a linear spring, and is disposed between the lock body 11 and the bolt 132. For example, one end of the linear spring may abut or be fixed to the lock body 11, while the other end may abut or be fixed to the bolt 132, biasing the bolt 132 to extend relative to the lock groove 12. Figure 5 and6 In the embodiment shown, the linear spring and connecting rod 133 can be housed together inside the lock body 11, and are shown by dashed lines in the figures.

[0085] Figure 7 yes Figure 6 The figure shows a bottom view of the fastening device 100. As shown, the lower surface of the latch 132 may include a tapering slope towards the end of the latch 132, which may be a smooth arc surface or a flat surface, and a tip 132A is formed at the end of the latch 132, while the upper surface of the latch 132 may be a generally flat plane. The tip 132A of the latch 132 may extend into a side opening 12A formed on the outer side of the lock groove 12.

[0086] Figure 8 This is a schematic perspective view of the fixing latch 20 of the fixing device according to the present invention. As shown, the fixing latch 20 may mainly include a locking seat 21 and a locking ring 22 extending from the locking seat 21. The locking seat 21 can be fixed to the medical bed body 300, for example, via fasteners such as screws or welding. The locking ring 22 may be formed into a generally bridge-shaped structure and includes a first leg 22A, a second leg 22B extending from the locking seat 21, and a crossbeam 22C extending between the first leg 22A and the second leg 22B.

[0087] The locking ring 22 can be fixed to the lock seat 21 by fasteners such as screws or by welding, or it can be integrally formed with the lock seat 21, for example by various metals or their alloys, various composite materials, etc.

[0088] In a preferred embodiment, the first leg 22A and the second leg 22B may be generally truncated conical structures that taper from the lock seat 21 toward the crossbeam 22C, that is, having a structure that is smaller at the top and larger at the bottom, so as to fit into the lock groove 12 in the vertical direction Z, for example, to be inserted into the lock groove 12.

[0089] Furthermore, preferably, after insertion into the locking groove 12, the relatively large dimensions of the lower portion or base of the first leg 22A and the second leg 22B allow for a small clearance fit between the locking groove 12 and the locking ring 22 (this clearance can be, for example, less than 0.05 mm, 0.1 mm, 0.2 mm, or 0.5 mm), thereby keeping the negative pressure isolation chamber 200 horizontally fixed relative to the medical bed 300. Preferably, the crossbeam 22C of the locking ring 22 may include an arc-shaped upper surface, particularly the upper portion of the crossbeam 22C. The lower portion of the crossbeam 22C of the locking ring 22 may be generally flat. Of course, for ease of manufacturing, the crossbeam 22C may be integrally formed into a generally cylindrical shape.

[0090] The fixing device 100 can be switched between a locked state and an unlocked state by means of the latching device 13. In the locked state, the fixing device 100 secures or locks the negative pressure isolation chamber 200 to the medical bed 300. At this time, the locking ring 22 has been inserted into the locking groove 12, and the locking tongue 132 passes over the crossbeam 22C from top to bottom in the longitudinal direction Z, so that the upper surface of the locking tongue 132 is locked below the crossbeam 22C. Preferably, there may be a gap (e.g., a small gap, such as less than 0.05mm, 0.1mm, 0.2mm or 0.5mm) between the upper surface of the locking tongue 132 and the lower surface of the crossbeam 22C, that is, the two are not tightly abutting each other, so as to facilitate switching to the unlocked state.

[0091] In the locked state, the locking groove 12 engages with the first leg 22A and the second leg 22B of the locking ring 22 to restrict movement of the locking groove 12 relative to the locking ring 22 within the mounting surface defined by the lateral direction X and the longitudinal direction Y. Additionally, the locking tongue 132 engages with the crossbeam 22C of the locking ring 22 to restrict movement of the locking groove 12 relative to the locking ring 22 in the longitudinal direction Z. In this way, the negative pressure isolation chamber 200 is locked to the medical bed 300 to restrict any relative movement between them.

[0092] In the unlocked state, the latching device 13 allows the negative pressure isolation chamber 200 to move relative to the medical bed 300. At this time, the biasing force of the elastic member 134 can be overcome by actuating the handle 131, causing the latch 132 and connecting rod 133 to retract together, i.e., move away from the crossbeam 22C, so that the latch 132 no longer obstructs the crossbeam 22C. This allows the locking groove 12 to move relative to the locking ring 22 in the vertical direction Z, and further, after releasing the locking groove 12 relative to the locking ring 22, allows the negative pressure isolation chamber 200 to move relative to the medical bed 300 in the lateral direction X and longitudinal direction Y, i.e., it can move freely.

[0093] Figure 9 This is a schematic bottom view of a negative pressure isolation chamber 200 according to a non-limiting embodiment of the present invention.

[0094] As shown in the figure, the guide rail 30 can be fixed to the bottom part of the negative pressure isolation chamber 200. As an example, the guide rail 30 can be provided with a guide groove 31 and a position adjustment fastener 32. The locking end of the position adjustment fastener 32 is locked in the guide groove 31 in the vertical direction Z and can move along the longitudinal direction of the guide groove 31.

[0095] As an example, the guide groove 31 may have a T-shaped cross-section, thus having guide channels of different sizes, such as a larger upper guide channel and a smaller lower guide channel. The circumferential dimension of the locking end of the position adjusting fastener 32 may be larger than the size of the upper guide channel, thereby locking in the upper guide channel and allowing its position to be adjusted in the longitudinal direction (i.e., along the upper guide channel).

[0096] The stud portion of the position adjusting fastener 32 can pass through the lower guide channel and the mounting hole on the isolation chamber lock 10 to secure the isolation chamber lock 10 to the guide rail 30, for example by means of the wing nut 34 (see Figure 7 Preferably, to improve the fastening effect, each fixing device 100 can be fixed to the guide rail 30 by means of two position adjustable fasteners 32 and corresponding wing nuts 34.

[0097] In addition, such as Figure 7 As shown in detail, multiple recesses 11B can be provided on the bottom part of the lock body 11 of the isolation chamber lock 10, such as four recesses 11B arranged symmetrically. The wing nut 34 can be arranged in the recesses 11B to avoid interference when it is engaged with the fixed lock 20, and the recesses 11B can reduce the weight of the fixing device 100.

[0098] In addition, such as Figure 6 and 7 As shown, the guide rail 30 may also be provided with fixing holes 33, through which fasteners (not shown) can be passed to fix the guide rail 30 to the negative pressure isolation chamber 200. This fixing method is known in the art, and therefore will not be described in detail herein.

[0099] The fixing and unlocking methods of the fixing device 100 according to the present invention can be specifically performed according to the following steps:

[0100] For the fixed method, the following steps can be taken:

[0101] 1) After aligning the locking groove 12 of the isolation chamber lock 10 in the fixing device 100 with the locking ring 22 of the fixing lock opening 20, the locking groove 12 is fitted onto the locking ring 22 and lowered. Preferably, the locking ring 22 has a structure that is smaller at the top and larger at the bottom, thus having a guiding function, and therefore it is very easy to fit on.

[0102] 2) During the insertion and lowering process, after the lower surface (e.g., the inclined surface) of the locking tongue 132 contacts the upper surface (e.g., the arc surface) of the crossbeam 22C of the locking ring 22, the locking tongue 132 automatically retracts under the action of the elastic member. After the locking tongue 132 descends to the hollow position of the locking ring 22, it automatically pops out again, thereby extending into the locking ring 22 below, thus completing the operation of fixing the negative pressure isolation chamber 200 to the medical bed 300.

[0103] To unlock, you can follow these steps:

[0104] 1) Pull the handle 131 of the isolation chamber lock 10 in the fixing device 100 outward (e.g. in the lateral direction X) so that the latch 132 disengages from the hollow area of ​​the locking ring 22.

[0105] 2) Lift the negative pressure isolation chamber 200. Once the locking tongue 132 is above the locking ring 22, release the handle 131 to complete the unlocking process of the negative pressure isolation chamber 200. At this time, the negative pressure isolation chamber 200 can move freely relative to the medical bed 300.

[0106] The terms “lateral direction,” “longitudinal direction,” “upper portion,” and “lower portion,” and the terms “first,” “second,” etc., used herein to indicate orientation or direction, are merely to enable those skilled in the art to better understand the concept of the invention as illustrated in preferred embodiments, and are not intended to limit the invention. Unless otherwise stated, all orders, orientations, or directions are used only to distinguish one element / component / structure from another, and unless otherwise stated, do not indicate any particular order, sequence of operations, direction, or orientation. For example, in an alternative embodiment, “first leg” may be “second leg,” and “lateral direction” may instead refer to “longitudinal direction.”

[0107] In summary, the fixing device 100 according to the embodiments of the present invention overcomes the shortcomings of the prior art and achieves the intended purpose of the invention.

[0108] While the fixing device of the present invention has been described above with reference to preferred embodiments, those skilled in the art should recognize that the above examples are merely illustrative and should not be construed as limiting the invention. Therefore, various modifications and variations can be made to the invention within the spirit and scope of the claims, and all such modifications and variations will fall within the scope claimed by the claims.

Claims

1. A fixing device (100) for fixing a negative pressure isolation chamber (200) to a medical bed (300), and comprising: The isolation chamber lock (10) includes a lock body (11) fixed to the negative pressure isolation chamber (200), a lock groove (12) arranged on the lock body (11), and a latching device (13) extending at least partially into the lock groove (12). A fixed locking mechanism (20) includes a locking seat (21) and a locking ring (22) extending from the locking seat (21), wherein the locking seat (21) is fixed to the medical bed body (300), and the locking ring (22) engages in the locking groove (12) in the vertical direction (Z), and the fixing mechanism (100) is switched between a locked state and an unlocked state by means of a latching device (13), wherein in the locked state the negative pressure isolation chamber (200) is fixed to the medical bed body (300), and in the unlocked state the negative pressure isolation chamber (200) is allowed to move relative to the medical bed body (300), and A guide rail (30) is fixed to the bottom of the negative pressure isolation chamber (200). The guide rail (30) is provided with a guide groove (31) and a position adjustment fastener (32). The locking end of the position adjustment fastener (32) is locked in the guide groove (31) in the vertical direction (Z) and can move along the longitudinal direction of the guide groove (31). The position adjustment fastener (32) passes through the mounting hole on the isolation chamber lock (10) to fix the isolation chamber lock (10) to the guide rail (30).

2. The fixing device (100) according to claim 1, characterized in that, In the locked state, the locking groove (12) cooperates with the locking ring (22) to restrict the movement of the locking groove (12) relative to the locking ring (22) within the mounting surface defined by the lateral direction (X) and the longitudinal direction (Y).

3. The fixing device (100) according to claim 2, characterized in that, The locking ring (22) includes a first leg (22A) and a second leg (22B) extending from the locking seat (21) and a crossbeam (22C) extending between the first leg (22A) and the second leg (22B), wherein the first leg (22A) and the second leg (22B) taper from the locking seat (21) toward the crossbeam (22C).

4. The fixing device (100) according to claim 1, characterized in that, The latching device (13) includes a handle (131) and a latch (132) fixed to the handle (131), wherein the latch (132) is actuated by the handle (131) to extend and retract relative to the lock groove (12), and wherein, in the locked state, the latch (132) extends relative to the lock groove (12), and in the unlocked state, the latch (132) retracts relative to the lock groove (12).

5. The fixing device (100) according to claim 4, characterized in that, The latching device (13) further includes a connecting rod (133) extending between the handle (131) and the latch (132) and an elastic member (134) arranged along the connecting rod (133), wherein the elastic member (134) is disposed between the lock body (11) and the latch (132) and biases the latch (132) toward the lock groove (12).

6. The fixing device (100) according to claim 5, characterized in that, The lower surface of the latch (132) includes a slope that tapers toward the end of the latch (132), while the crossbeam (22C) of the lock ring (22) includes an arc-shaped upper surface.

7. An air ambulance unit (1000) comprising a negative pressure isolation chamber (200) and a medical bed (300), the negative pressure isolation chamber (200) and the medical bed (300) being detachably fixed together by a fixing device (100) according to any one of claims 1-6.

8. The air ambulance unit (1000) according to claim 7, characterized in that, Four fixing devices (100) are provided and are arranged symmetrically in pairs about the medical bed body (300) on the mounting surface.

9. A medical aircraft comprising an air ambulance unit (1000) according to claim 8, wherein, The medical bed (300) is fixedly connected to the fuselage of the medical aircraft.

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