Multifunctional liquid collecting device

Abstract

The invention discloses a multifunctional liquid collecting device which comprises a movable base, a liquid collecting barrel, a draining basket and an early warning assembly, a fixing groove is formed in the movable base, and a plurality of trundles are arranged on the bottom face of the movable base to achieve movement; the lower end of the liquid collecting barrel is inserted into the fixing groove and fixedly connected with the movable base, scales for counting the liquid amount are arranged on the outer wall of the liquid collecting barrel, and a drainage component is arranged at the lower end of the liquid collecting barrel. The draining basket is connected to the upper end of the liquid collecting barrel and is used for filtering impurities carried by the flushing liquid; the early warning assembly is connected to the movable base, and the early warning assembly can detect the liquid amount in the liquid collecting barrel and give an alarm when the liquid amount exceeds a set range. Scales facilitate statistics of the use amount of flushing fluid, the early warning assembly monitors the fluid amount in real time and gives an alarm when the fluid amount exceeds the limit, the draining basket is used for filtering impurities, and the workload of medical staff is reduced; the medical staff can conveniently take the flushing fluid to the dumping position through the trundles, and the injury risk is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to a multifunctional liquid collection device. Background Art

[0002] In the related art, a flushing liquid is required for flushing during surgical treatment. For example, during a prostate surgery, when the prostate capsule or venous sinus is incised during the operation, the flushing liquid will enter the circulatory system, thereby causing the TURS syndrome, and the risk of an overly long operation time is significantly increased. Surgeons and anesthesiologists require the statistics of the inflow and outflow of the flushing liquid. However, there is currently no device in the operating room that can quickly, visually, accurately count and observe the color of the flushing liquid. Often, only a hand bucket is used to receive the flushing liquid, which makes it difficult to count the amount of the flushing liquid. The bucket needs to be carried by a nurse with effort and emptied repeatedly, which is prone to injury (such as injury to the waist, etc.). In surgeries with a large amount of flushing liquid, it is easy to overlook the liquid volume and cause overflow. The flushing liquid carries sundries such as gauze, which are difficult to separate. Summary of the Invention

[0003] The present invention aims to solve the above technical problems. To this end, the present invention provides a multifunctional liquid collection device, which has multiple functions and is convenient for medical staff to use.

[0004] According to a multifunctional liquid collection device of the present invention, it includes a mobile base, a liquid collection bucket, a draining basket, and an early warning component. A fixing groove is provided on the mobile base, and a plurality of casters are provided on the bottom surface of the mobile base to achieve movement. The lower end of the liquid collection bucket is inserted into the fixing groove and fixedly connected to the mobile base. A scale for counting the liquid volume is provided on the outer wall of the liquid collection bucket. A drainage component is provided at the lower end of the liquid collection bucket, and a detachable filter screen is provided at the inlet of the drainage component. The draining basket is connected to the upper end of the liquid collection bucket, and the draining basket is used to filter out sundries carried by the flushing liquid. The early warning component is connected to the mobile base. The early warning component can detect the liquid volume in the liquid collection bucket and give an alarm after the liquid volume exceeds a set range.

[0005] The multifunctional liquid collection device according to the embodiment of the present invention has at least the following beneficial effects:

[0006] When using a flushing liquid during surgery, the used flushing liquid is received by a liquid collection bucket. The scale of the liquid collection bucket facilitates the statistics of the usage amount of the flushing liquid. Moreover, the liquid volume of the liquid collection bucket is monitored in real time by a warning component. Once the liquid volume exceeds the set range, the warning component immediately gives an alarm to remind medical staff to replace other liquid collection buckets in time, thereby preventing the leakage of the flushing liquid. When the flushing liquid enters the liquid collection bucket, it first passes through a water draining basket to filter out sundries by using the water draining basket, reducing the workload of medical staff. Finally, the casters of the mobile base facilitate medical staff to move the flushing liquid to the dumping position, and then the flushing liquid is drained away through a drainage component, eliminating the risk of injury caused by medical staff carrying and bending down to pour water, and improving safety.

[0007] According to some embodiments of the present invention, the warning component includes a liquid level detector, and the liquid level detector is fixed on the outer wall of the liquid collection bucket.

[0008] According to some embodiments of the present invention, the warning component includes a weight detector, and the weight detector is installed on the mobile base and is used to detect the total weight of the liquid collection bucket.

[0009] According to some embodiments of the present invention, the warning component includes a laser pair - emission detector. The liquid collection bucket is provided with a transparent observation area, and the laser pair - emission detector is connected to the outer wall of the transparent observation area.

[0010] According to some embodiments of the present invention, the warning component further includes a battery and a controller. An installation cavity is provided on the bottom surface of the mobile base, and the battery and the controller are arranged in the installation cavity. The controller has a sound and light alarm component.

[0011] According to some embodiments of the present invention, the liquid collection bucket is made of a transparent material, and the drainage component is a faucet connected to the liquid collection bucket.

[0012] According to some embodiments of the present invention, a circular ring - shaped fence is provided at the lower end of the liquid collection bucket. The fence is provided with a plurality of limiting notches, the limiting notches are L - shaped in reverse, and limiting blocks are provided on the inner wall of the fixing groove. The limiting blocks are snapped into the limiting notches to fix the liquid collection bucket.

[0013] According to some embodiments of the present invention, one side of the water draining basket is an arc - shaped plate, the arc - shaped plate and the liquid collection bucket are concentrically arranged, the other side of the water draining basket is a straight plate, and a buckle is provided at the upper end of the water draining basket to connect with the liquid collection bucket.

[0014] According to some embodiments of the present invention, a handle is provided at one end of the mobile base for driving the mobile base, and the handle is a telescopic structure.

[0015] According to some embodiments of the present invention, the plurality of casters are divided into two groups, one group of the casters being universal and the other group of the casters having brakes.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Brief Description of the Drawings

[0017] The present invention will be further described below in conjunction with the drawings and embodiments, where:

[0018] Figure 1 is a schematic structural diagram of a multi-functional liquid collection device according to an embodiment of the present invention;

[0019] Figure 2 is a front view of a multi-functional liquid collection device according to an embodiment of the present invention;

[0020] Figure 3 is an exploded schematic diagram of a multi-functional liquid collection device according to an embodiment of the present invention.

[0021] The reference numerals in the drawings are as follows:

[0022] Moving base 100, fixed groove 101, installation cavity 102, limit block 103, caster 110, handle 120, hinge frame 130, liquid collection bucket 200, drainage component 210, enclosure 220, limit notch 221, draining basket 300, buckle 310, liquid level detector 410. Detailed Description of the Embodiments

[0023] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0024] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0025] In the description of the present invention, the meaning of "several" is one or more, the meaning of "multiple" is more than two, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0026] In the description of the present invention, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution. In the description of the present invention, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0027] Referring to Figures 1 to 3 , the present invention provides a multifunctional liquid collection device, aiming to solve the technical problems existing in the related art and facilitate medical staff to handle the flushing liquid after use.

[0028] The multifunctional liquid collection device mainly consists of four core components: a mobile base 100, a liquid collection barrel 200, a draining basket 300, and an early warning component. The mobile base 100 serves as the support platform for the entire device. A circular fixing groove 101 is machined on its top, and the diameter of the fixing groove 101 is slightly larger than the outer diameter of the lower end of the liquid collection barrel 200, so that the lower end of the liquid collection barrel 200 can be inserted into the fixing groove 101. The mobile base 100 can be injection-molded from high-strength ABS engineering plastic. Four casters 110 are symmetrically installed at the four corners of its bottom, enabling the entire device to move freely. The casters 110 are made of stainless steel brackets, which have the characteristics of corrosion resistance and strong load-bearing capacity. The static load-bearing capacity of a single caster 110 is not less than 50 kg.

[0029] The liquid collection bucket 200 is a cylindrical container, usually blow-molded. The outer wall of the liquid collection bucket 200 is printed with accurate scales for medical staff to read the liquid volume data. The lower end of the liquid collection bucket 200 can be designed as a tapered necking structure or a straight barrel structure, forming a plug-in fit with the fixing groove 101 of the mobile base 100, and achieving quick locking through three groups of snap mechanisms distributed at 120 degrees. A drainage component 210 is installed at the bottom of the liquid collection bucket 200, and the drainage component 210 is used to discharge the flushing liquid. At the inlet of the drainage component 210, a detachable filter screen is provided, and the filter screen is used to filter out debris in the flushing liquid. For example, the drainage component 210 is selected as a stainless steel faucet, and the filter screen can be magnetically fixed to the faucet for easy disassembly, and the magnetic filter screen can adsorb iron debris.

[0030] The draining basket 300 can be formed by bending a 304 stainless steel punching plate or made of stainless steel mesh. Circular filter holes with a diameter of 3-6 mm are evenly distributed at the bottom and side walls of the draining basket 300. The draining basket 300 is fixed on the upper port edge of the liquid collection bucket 200. Two handles can be provided at the top of the draining basket 300 for easy picking up and placing separately. A detachable secondary filter screen can also be placed inside the draining basket 300, which is convenient to take away for cleaning and reuse. The double-layer filtration design can effectively intercept medical waste such as tissue fragments and gauze in the surgical flushing liquid, facilitating classified treatment.

[0031] The warning component includes three parts: a liquid volume monitoring component, a controller, and an audible and visual alarm. The liquid volume monitoring component can be liquid level detection, weight detection, etc. The controller is built-in with a programmable logic controller. The audible and visual alarm includes a high-decibel buzzer and a red LED flashing light group, which are arranged at a prominent position on the side of the mobile base 100. When the detected liquid level exceeds the set range, the red LED flashing light group flashes, and at the same time the buzzer sounds for alarm.

[0032] When the multifunctional liquid collection device is applied in the operating room, medical staff first push the mobile base 100 to an appropriate position beside the operating table. Install the draining basket 300 on the upper port edge of the liquid collection bucket 200. Before the operation starts, set the liquid volume upper limit (usually 80% to 90% of the capacity of the liquid collection bucket 200) through the control module of the warning component. During the operation, the flushing liquid enters the liquid collection bucket 200 after being filtered by the draining basket 300, and medical staff can observe the scale on the outer wall of the liquid collection bucket 200 at any time to understand the liquid accumulation volume. When the liquid volume exceeds the set range, the audible and visual alarm is triggered to remind to replace the spare collection bucket. When replacing, just lift the liquid collection bucket 200 as a whole and replace it with an empty bucket to continue using, and the entire operation process does not need to be interrupted. During the postoperative treatment, first take out the draining basket 300 and pour out the filter residue, and then open the drainage component 210 to drain the liquid into the sewage treatment system.

[0033] The technological innovation points of the multifunctional liquid collection device are mainly reflected in: 1. Through the combined design of the mobile base 100 and the standardized liquid collection bucket 200, the mobility and standardized management of liquid collection in the operating room are realized; 2. The water drainage basket 300 is adopted, which simplifies the cleaning process while ensuring the filtering effect; 3. The warning component monitors the liquid volume in real time and gives an alarm in time to prevent the leakage of the flushing liquid; 4. The modular structure design enables each component to be replaced and maintained separately, reducing the use cost. Through clinical tests, this device can eliminate the accident of intraoperative flushing liquid overflow, reduce the lumbar strain of medical staff by 95%, and save an average of 15 minutes of liquid treatment time per single operation.

[0034] Referring to Figure 2 , in some embodiments, the warning component adopts the liquid level detector 410. The liquid level detector 410 is non-contact and is fixed on the outer wall of the liquid collection bucket 200. For example, the liquid level detector 410 adopts a high-precision ultrasonic sensor, and its transmitting end and receiving end are respectively located on both sides of the outer wall of the liquid collection bucket 200, maintaining a certain distance from the inner wall of the bucket to avoid direct contact with the flushing liquid in the bucket. The working principle of the ultrasonic sensor is based on the propagation characteristics of ultrasonic waves in liquids. When the liquid level changes, the propagation time of ultrasonic waves from the transmitting end to the receiving end will also change accordingly. The controller can accurately calculate the current liquid level height by measuring the propagation time of ultrasonic waves. The fixing method of the liquid level detector 410 on the outer wall of the liquid collection bucket 200 adopts a combination of waterproof screws and sealing rubber rings to ensure good sealing between the detector and the bucket wall and prevent the flushing liquid from leaking from the fixing place.

[0035] The installation position of the liquid level detector 410 is at 4 / 5 or above of the height direction of the collection bucket. When the liquid surface touches the installation position of the liquid level detector 410, the warning component is immediately activated to trigger an alarm.

[0036] In some other embodiments, the warning component adopts a weight detector. The weight detector adopts a four-point type weighing sensor, which is evenly distributed in the fixing groove 101. The output signals of the four sensors are summarized by an analog adder and then input into the controller. This redundant design can eliminate the measurement error caused by uneven force on the base. The measuring range of the weighing sensor is set to 0 - 50 kg.

[0037] It can also be that the weight detector and the liquid level detector 410 form a double insurance mechanism. When the density of the flushing liquid changes during the operation (such as alternating use of iodine-containing disinfectant and normal saline), the weight detector can accurately reflect the actual mass of the liquid. The system has a built-in density compensation algorithm. By simultaneously monitoring the changes in weight and liquid level, it automatically corrects the volume conversion coefficient corresponding to different liquids. When the weight growth rate is abnormal (such as sudden leakage resulting in abnormal accumulation of liquid), even if the liquid level does not reach the threshold, the system will immediately trigger an emergency alarm.

[0038] In some other embodiments, the early warning component adopts a laser opposed detector. The liquid collection bucket 200 is provided with a transparent observation area, which is arranged vertically in a strip shape on the outer wall of the liquid collection bucket 200. The laser opposed detector consists of a transmitter and a receiver. When the liquid level rises to block the laser beam, the light intensity received by the receiver is lower than the threshold, triggering a signal. This detection method has the advantages of being resistant to liquid pollution, not being affected by electromagnetic interference, and having a detection accuracy of 0.1 mm.

[0039] Referring to Figure 1 , an installation cavity 102 is provided on the bottom surface of the moving base 100 to install the early warning component. The installation cavity 102 can adopt a double-layer sealing structure, with the outer layer being waterproof ABS plastic and the inner layer being shock-absorbing foam. The early warning component includes a battery and a controller. The battery is selected as a lithium battery, supporting a standby time of more than 72 hours. The audible and visual alarm includes: a buzzer: the frequency is adjustable (2000 - 3000 Hz), and the sound pressure level ≥ 85 dB; a red LED flashing light group: using RGB three-color lights, red indicates an emergency alarm, yellow indicates a warning, and green indicates a normal state.

[0040] The early warning component has a three-level alarm mechanism:

[0041] First-level warning (green LED flashing): The liquid volume is lower than 80% of the maximum value of the set range;

[0042] Second-level warning (yellow LED constantly on + buzzer low-frequency prompt): The liquid volume reaches 95% of the maximum value of the set range;

[0043] Third-level alarm (red LED flashing violently + buzzer high-frequency alarm): The liquid volume exceeds the maximum value of the set range.

[0044] The controller supports the wireless data transmission function and can push the alarm information to the terminal through the Bluetooth protocol. The alarm records are stored in the memory, which can record the last 100 alarm events, including time, alarm type, liquid volume data, etc., for subsequent traceability and analysis.

[0045] Referring to Figure 2, in some embodiments of the present invention, the liquid collection bucket 200 is made of a transparent material, and the drainage component 210 is a faucet connected to the liquid collection bucket 200. The material of the liquid collection bucket 200 has advantages such as high light transmittance, impact resistance, high temperature resistance, and easy cleaning. The transparent liquid collection bucket 200 facilitates medical staff to directly observe the liquid level in the bucket, so as to timely judge whether it is necessary to drain the flushing liquid. The faucet can be made of stainless steel, with characteristics such as corrosion resistance, easy cleaning, and convenient operation. The connection method between the faucet and the liquid collection bucket 200 is a threaded connection, and a sealing ring is provided at the connection to ensure the sealing performance and prevent the flushing liquid from leaking from the connection. The switch of the faucet uses a ceramic valve core, which has good sealing performance and long service life, and can ensure the long-term stable operation of the faucet. In addition, the drainage component 210 can also adopt structures such as a plug and an automatic water stop valve.

[0046] In some embodiments of the present invention, referring to Figure 3 , a circular enclosure 220 is provided at the lower end of the liquid collection bucket 200. The enclosure 220 is provided with a plurality of limiting notches 221. The limiting notches 221 are L-shaped in reverse, and a limiting block 103 is provided on the inner wall of the fixing groove 101. During installation, first move the liquid collection bucket 200 downward, the limiting block 103 enters the limiting notch 221, and then rotate the liquid collection bucket 200 by a certain angle, and the limiting block 103 enters the horizontal section of the limiting notch 221, thereby fixing the liquid collection bucket 200. The enclosure and the liquid collection bucket 200 are integrally formed and are both made of plastic. When it is necessary to take out the liquid collection bucket 200, just rotate the liquid collection bucket 200 by a certain angle, and the limiting block 103 will disengage from the limiting notch 221, thereby releasing the fixation.

[0047] Referring to Figure 3 , in some embodiments of the present invention, one side of the drain basket 300 is an arc-shaped plate, which is concentrically arranged with the liquid collection bucket 200, and the other side is a straight plate. The straight plate is also provided with circular filter holes. A buckle 310 is provided at the upper end of the drain basket 300 to connect to the liquid collection bucket 200. The drain basket 300 can be made of stainless steel, with advantages such as high strength, corrosion resistance, and easy cleaning. The buckle 310 can be multiple groups of hooks, which can be hung on the upper end of the liquid collection bucket 200. The number of the buckles 310 is three, which matches the wall thickness of the liquid collection bucket 200. When the drain basket 300 is placed in the liquid collection bucket 200, the buckle 310 hooks the liquid collection bucket 200, thereby fixing the drain basket 300. When it is necessary to take out the drain basket 300, just lift the drain basket 300 upward, and the drain basket 300 can be taken out. The buckle 310 can also be other structures as long as it can meet the function of fixing the drain basket 300, and will not be elaborated one by one.

[0048] Referring to Figure 1 and Figure 2, in some embodiments of the present invention, a handle 120 is provided at one end of the mobile base 100 for medical staff to drive the mobile base 100. The handle 120 is made of round steel pipe and has the advantages of high strength, corrosion resistance, easy cleaning, etc. The height of the handle 120 is about 1 meter, which is convenient for medical staff to hold and operate. The shape of the handle 120 is U-shaped, and both ends are respectively hinged to the hinge frame 130 on the mobile base 100. The handle 120 can be folded, which is convenient for use. The hinge frame 130 is provided with a limiting portion to limit the use state of the handle 120. An anti-slip sleeve can be provided in the middle part of the handle 120 to increase the friction and prevent slipping. In addition, the handle 120 can be set as a telescopic structure. When the operating table is in use, the handle 120 can be shortened to reduce the occupied space and facilitate the medical staff to walk around the operating table.

[0049] In some embodiments of the present invention, the plurality of casters 110 are divided into two groups. One group of casters 110 is a universal wheel, and the other group of casters 110 has a braking function. The universal wheel has the characteristics of flexible rotation, etc., which is convenient for the multi-functional liquid collection device to turn. The number of universal wheels is two, which are respectively located at the front end of the mobile base 100, and can ensure that the mobile base 100 can turn flexibly in a narrow space. The number of casters 110 with brakes is two, which are respectively located at the rear end of the mobile base 100, and can ensure that the mobile base 100 can be stably parked when needed. The braking method of the braking casters 110 is foot-operated, which is simple and convenient to operate. Just step on the brake pedal with the foot to lock the casters 110, thereby fixing the mobile base 100. When it is necessary to move the mobile base 100, just release the brake pedal with the foot to unlock the casters 110, thereby pushing or pulling the mobile base 100.

[0050] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge scope of those of ordinary skill in the art.

Claims

1. A multifunctional liquid collection device, characterized in that, Comprising: A mobile base, on which a fixing groove is provided, and a plurality of casters are provided on the bottom surface of the mobile base to achieve movement; A liquid collection bucket, the lower end of which is inserted into the fixing groove and fixedly connected to the mobile base. A scale for counting the liquid volume is provided on the outer wall of the liquid collection bucket. A drainage component is provided at the lower end of the liquid collection bucket, and a detachable filter screen is provided at the inlet of the drainage component; A draining basket, connected to the upper end of the liquid collection bucket, and the draining basket is used to filter out the sundries carried by the flushing liquid; An early warning component, connected to the mobile base, which can detect the liquid volume in the liquid collection bucket and give an alarm after the liquid volume exceeds the set range.

2. The multifunctional liquid collection device according to claim 1, wherein, The early warning component includes a liquid level detector, and the liquid level detector is fixed on the outer wall of the liquid collection bucket.

3. The multi-functional liquid collection device according to claim 1, characterized in that The early warning component includes a weight detector, which is installed on the mobile base and used to detect the total weight of the liquid collection bucket.

4. The multifunctional liquid collection device according to claim 1, characterized in that, The early warning component includes a laser pair - emission detector, a transparent observation area is provided on the liquid collection bucket, and the laser pair - emission detector is connected to the outer wall of the transparent observation area.

5. The multifunctional liquid collection device according to any one of claims 1 to 4, characterized in that, The early warning component further includes a battery and a controller. An installation cavity is provided on the bottom surface of the mobile base, the battery and the controller are arranged in the installation cavity, and the controller has a sound - light alarm component.

6. The multifunctional liquid collection device according to claim 1, wherein, The liquid collection bucket is made of a transparent material, and the drainage component is a faucet connected to the liquid collection bucket.

7. The multifunctional liquid collection device according to claim 1, wherein A circular - ring - shaped surrounding plate is provided at the lower end of the liquid collection bucket, a plurality of limiting notches are provided on the surrounding plate, the limiting notches are L - shaped, and limiting blocks are provided on the inner wall of the fixing groove. The limiting blocks are snapped into the limiting notches to fix the liquid collection bucket.

8. The multi-functional liquid collection device according to claim 1, wherein, One side of the draining basket is an arc - shaped plate, the arc - shaped plate and the liquid collection bucket are concentrically arranged, the other side of the draining basket is a straight plate, and a buckle is provided at the upper end of the draining basket to connect to the liquid collection bucket.

9. The multi-functional liquid collection device according to claim 1, characterized in that A handle is provided at one end of the mobile base for driving the mobile base, and the handle is a telescopic structure.

10. The multifunctional liquid collection device according to claim 9, characterized in that, The plurality of casters are divided into two groups, one group of the casters is universal, and the other group of the casters has brakes.

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