An arm restraint

CN224735419UActive Publication Date: 2026-09-11THE FIRST AFFILIATED HOSPITAL OF SUN YAT SEN UNIV
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202521007681.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-05-20
Publication Date
2026-09-11
Estimated Expiration
2035-05-20

AI Technical Summary

Technical Problem

[0004]本实用新型要解决的技术问题是:解决现有的手臂约束装置不能进行个性化调整,常常导致某些患者感到束缚过重,增加不适感问题

Benefits of technology

[0015]本实用新型实施例提供的手臂约束带与现有技术相比,其有益效果在于:通过基于病房患者们手臂力度平均值在配重腔内设置配重砂的重量,从而使得手臂约束带的重量约束具有良好的通用性,再根据患者个人的手臂力量在带体的口袋上调节配重块数量,从而进行在具有良好的通用性基础上进行快捷个性化重量调节,通过让魔术贴毛面与魔术贴勾面相匹配,从而让带体首尾相连形成环形以对手腕进行重量约束,通过个性化带体的重量从而适度约束手臂移动,减少患者不适感。

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224735419U_ABST
    Figure CN224735419U_ABST
Patent Text Reader

Abstract

The utility model discloses an arm restraint band includes: the band body, the band body inside is equipped with counterweight cavity, fills in the counterweight sand in the counterweight cavity, the band body is equipped with a plurality of pockets, and the both ends of band body are equipped with magic tape wool face and magic tape hook face respectively, zipper, the zipper sets up on the counterweight cavity, when the zipper opens, the counterweight cavity is connected with the outside, a plurality of counterweight blocks, the counterweight block can be detachably arranged in the pocket, fixed band, the fixed band is connected with the band body. The utility model discloses through based on the weight of the counterweight sand in the counterweight cavity of the average value of the arm strength of the patient in the ward, so that the weight restraint of arm restraint band has good universality, and then according to the arm strength of the individual patient adjusts the counterweight block quantity on the pocket of the band body, so that on the basis of good universality, fast individualized weight adjustment is carried out, and the arm movement is moderately restrained through the individualized band body weight, and the discomfort of the patient is reduced.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an arm restraint strap. Background Technology

[0002] Currently, when dealing with patients with weakened limb strength, especially hemiplegic and elderly patients, during intubation treatments such as gastric tubes and nasojejunal tubes, patients often exhibit behaviors such as pulling on their arms or pulling out the tubes due to emotional instability and inability to fully control their bodies. To avoid these adverse behaviors, the common practice is to wear a restraint strap on the patient's wrist and use tools such as a restraint plate for double fixation.

[0003] In existing technologies, the double-fixation arm restraint method causes discomfort for patients, especially elderly patients or those with weakened limb strength. Prolonged restraint can easily trigger psychological distress or irritability. This discomfort can further fluctuate the patient's emotions, affecting their cooperation during treatment and even leading to treatment resistance. While a simple arm restraint structure can restrict arm movement to some extent, its effectiveness is often unsatisfactory. Pulling movements may still occur even under the restraint, especially for patients with limited mobility. Simple restraint cannot provide sufficient control and cannot completely prevent patients from pulling out or pulling on the tubes during intubation treatment. Because existing arm restraint devices often have a uniform weight and fixed structure, they cannot be personalized to meet the needs of different patients. Each patient's physical condition, comfort requirements, and even pressure tolerance are different. Therefore, the lack of personalized adjustments to existing arm restraint devices often results in some patients feeling overly constrained and experiencing increased discomfort. Utility Model Content

[0004] The technical problem this invention aims to solve is: addressing the issue that existing arm restraint devices cannot be customized, often leading to some patients feeling excessively restricted and experiencing increased discomfort.

[0005] To solve the above-mentioned technical problems, this utility model provides an arm restraint strap, comprising: a strap body, wherein the strap body has a counterweight cavity inside, the counterweight cavity is filled with counterweight sand, the strap body has multiple pockets, and both ends of the strap body are respectively provided with a hook and loop fastener and a hook and loop fastener, wherein when the hook and loop fastener and the hook and loop fastener are matched, the strap body is connected end to end, and the multiple pockets are located on the outer surface of the strap body; a zipper, the zipper is disposed on the counterweight cavity, and when the zipper is opened, the counterweight cavity is connected to the outside; multiple counterweight blocks, the counterweight blocks are detachably disposed in the pockets; and a fixing strap, the fixing strap being connected to the strap body.

[0006] Furthermore, the inner side of the pocket is provided with a groove, and the side of the counterweight is provided with a protrusion that matches the groove. The length of the counterweight is greater than the depth of the pocket.

[0007] Furthermore, the pocket is made of elastic fabric, and the inner side of the pocket presses against the counterweight.

[0008] Furthermore, the protrusion is an inclined protrusion, and the height of the protrusion gradually decreases towards the bottom of the pocket.

[0009] Furthermore, the fixing belt includes a spool and a strip, the first end of the strip is wound inside the spool, the strip can extend outward or retract into the spool, and the spool is connected to the belt body.

[0010] Furthermore, the fixing belt also includes a fixing clip, which is disposed on the second end of the strip.

[0011] Furthermore, it also includes an amplitude sensor disposed on the belt body, the amplitude sensor being used to sense the swing amplitude of the belt body.

[0012] Furthermore, it also includes an alarm device installed on the belt. When the amplitude sensor detects that the swing amplitude of the belt exceeds a set value, the alarm device will sound an alarm.

[0013] Furthermore, the retaining band is made of an elastic material.

[0014] Furthermore, the plurality of pockets are evenly arranged along the length of the belt, and the opening of the pockets is perpendicular to the length of the belt.

[0015] Compared with the prior art, the arm restraint strap provided in this embodiment of the utility model has the following advantages: by setting the weight of the counterweight sand in the counterweight cavity based on the average arm strength of patients in the ward, the weight restraint strap has good versatility. Furthermore, the number of counterweight blocks on the pocket of the strap can be adjusted according to the individual arm strength of the patient, thereby enabling quick and personalized weight adjustment on the basis of good versatility. By matching the hook and loop sides of the Velcro, the strap is connected end to end to form a ring to restrain the wrist. The personalized weight of the strap moderately restrains arm movement and reduces patient discomfort. Attached Figure Description

[0016] Figure 1 This is a first perspective view of the arm restraint strap provided by this utility model;

[0017] Figure 2 This is a second perspective view of the arm restraint strap provided by this utility model;

[0018] Figure 3 This is a front view of the arm restraint strap provided by this utility model;

[0019] Figure 4 This is a top view of the arm restraint strap provided by this utility model;

[0020] Figure 5 This is a left view of the arm restraint strap provided by this utility model;

[0021] Figure 6 This is a first cross-sectional view of the arm restraint strap provided by this utility model;

[0022] Figure 7 This is a second cross-sectional view of the arm restraint strap provided by this utility model;

[0023] Figure 8 This is a three-dimensional view of the annular state of the arm restraint strap provided by this utility model.

[0024] The correspondence between the reference numerals and the component names is as follows:

[0025] 1. Belt body; 11. Pocket; 12. Velcro loop side; 13. Velcro hook side; 101. Counterweight cavity; 102. Groove;

[0026] 2. Alarm device;

[0027] 3. Zipper;

[0028] 4. Counterweight; 41. Protrusion;

[0029] 5. Fixing belt; 51. Roller; 52. Strip belt; 53. Fixing clip;

[0030] 6. Amplitude sensor. Detailed Implementation

[0031] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope. It should be noted that, unless otherwise specifically stated, the relative arrangement and numerical values ​​of the components and steps described in these examples do not limit the scope of this utility model.

[0032] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0033] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0034] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0036] like Figures 1 to 8 As shown in the figure, this utility model embodiment discloses an arm restraint strap, including: a strap body 1, the strap body 1 having a counterweight cavity 101 inside, the counterweight cavity 101 being filled with counterweight sand, the strap body 1 having multiple pockets 11, and the two ends of the strap body 1 having a hook and loop fastener 12 and a hook and loop fastener 13 respectively, when the hook and loop fastener 12 and the hook and loop fastener 13 are matched, the strap body 1 is connected end to end, and the multiple pockets 11 are located on the outer surface of the strap body 1; a zipper 3, the zipper 3 being disposed on the counterweight cavity 101, the counterweight cavity 101 being connected to the outside when the zipper 3 is opened; multiple counterweight blocks 4, the counterweight blocks 4 being detachably disposed in the pockets 11; and a fixing strap 5, the fixing strap 5 being connected to the strap body 1.

[0037] The arm restraint strap of this application sets the weight of the counterweight sand in the counterweight cavity 101 with zipper 3 based on the average arm strength of patients in the ward, so that the weight restraint of the arm restraint strap has good universality. Then, according to the individual arm strength of the patient, the number of counterweight blocks 4 on the pocket 11 of the strap body 1 can be adjusted to achieve quick and personalized weight adjustment on the basis of good universality. The personalized weight of the strap body 1 can moderately restrain arm movement and reduce patient discomfort.

[0038] By incorporating a counterweight chamber 101 and multiple pockets 11 on the belt body 1, precise adjustment of arm restraint force can be achieved by adjusting the amount of counterweight sand and adding counterweight blocks 4 according to the patient's specific needs. The combination of counterweight sand and counterweight blocks 4 effectively restricts arm movement and allows for personalized adjustments based on the patient's arm strength, ensuring both comfort and effectiveness of arm restraint. The detachable counterweight blocks 4 allow users to flexibly increase or decrease their number according to the patient's arm strength, ensuring appropriate restraint force is provided. The zipper 3 facilitates quick adjustment of the amount of counterweight sand, while also making the operation of the entire counterweight chamber 101 simpler and faster.

[0039] By aligning the hook and loop sides 12 of the Velcro strap 1 with the hook and loop sides 13 at both ends, the arm restraint strap can be securely and loop-fixed to the patient's arm. The tightness can be adjusted according to the patient's needs, ensuring the restraint strap's stability and comfort. The fixing strap 5 further enhances the arm restraint strap's stability and reduces the risk of loosening. Because the arm restraint strap's weight adjustment is highly flexible, it can be widely used for various patient groups, including postoperative rehabilitation patients, patients requiring long-term bed rest, and patients needing to prevent involuntary arm movements. Its design is suitable not only for hospital wards but also for rehabilitation centers or home care.

[0040] The arm restraint strap features dual adjustment of weight blocks 4 and counterweight sand. The weight of the counterweight sand inside the counterweight chamber 101 is set based on the baseline arm strength of patients in the ward. The number of counterweight blocks 4 is then adjusted individually according to the patient's arm strength to restrict arm movement. In use, nursing staff first open the zipper 3 of the counterweight chamber 101 and place an appropriate amount of counterweight sand inside, based on the patient's baseline arm strength. Next, based on the patient's individual arm strength, the nursing staff places an appropriate amount of counterweight blocks 4 into the pocket 11 on the side of the strap body 1. If the patient's arm strength is weak, fewer counterweight blocks 4 can be selected to ensure that the arm does not feel uncomfortable or experience excessive pressure under the restraint strap. Finally, the nursing staff adjusts the tightness of the restraint strap using Velcro to ensure its stability and comfort, preventing excessive arm movement.

[0041] Specifically, the counterweight 4 is detachably installed in the pocket 11 by means of adhesive strips, elastic buckles, clips, etc., and the fixing strap 5 is one of elastic strap, cloth strap and nylon strap; the pocket 11 and the counterweight 4 are set one-to-one.

[0042] like Figure 1 and Figure 6 As shown, in an optional embodiment of the utility model, the inner side of the pocket 11 is provided with a groove 102, and the side of the counterweight 4 is provided with a protrusion 41 that matches the groove 102. The length of the counterweight 4 is greater than the depth of the pocket 11.

[0043] By providing a groove 102 on the inner side of the pocket 11 and a matching protrusion 41 on the side of the counterweight 4, the counterweight 4 can be effectively prevented from sliding or shifting within the pocket 11. When the counterweight 4 is placed in the pocket 11, the engagement of the protrusion 41 and the groove 102 ensures that the counterweight 4 is firmly fixed within the pocket 11 and will not loosen due to movement or external force, thereby improving the stability and safety of the arm restraint strap.

[0044] The length of the counterweight 4 is greater than the depth of the pocket 11, ensuring that a portion of the counterweight 4 protrudes outside the pocket 11 when inserted. This structure makes the counterweight 4 easier to remove and place, and allows caregivers to more easily increase or decrease the number of counterweights 4 to adjust according to the patient's specific needs, thereby improving the flexibility of use.

[0045] The matching of the counterweight 4 with the groove 102 of the pocket 11 reduces friction between the counterweight 4 and the pocket 11, avoiding wear and tear caused by frequent use. This structure helps extend the service life of the arm restraint strap, maintaining its efficiency and stability during long-term use.

[0046] Because the counterweight 4 is firmly fixed inside the pocket 11, it will not move or be squeezed unnecessarily during use, effectively reducing discomfort caused by the shifting or shaking of the counterweight 4 and improving patient comfort. At the same time, the stable counterweight 4 ensures consistent restraint effectiveness, preventing uneven weight distribution from affecting the arm restraint. The matching of the groove 102 and the protrusion 41 allows the pocket 11 of the arm restraint and the counterweight 4 to form a tighter fit, thereby improving the stability and tightness of the overall structure, further enhancing the restraint's effectiveness, and ensuring high restraint force in various environments.

[0047] like Figure 3 and Figure 4 As shown, in an alternative embodiment of the utility model, the pocket 11 is made of elastic fabric, and the inner side of the pocket 11 is pressed against the counterweight 4.

[0048] The pocket 11 is made of elastic fabric, which can be appropriately compressed according to the shape and size of the counterweight 4. This compression helps the counterweight 4 fit snugly inside the pocket 11, preventing it from shifting or slipping during use, thereby improving the stability of the counterweight 4 and the effectiveness of the arm restraint strap. The elastic fabric has good flexibility and adaptability, and can be adjusted according to the shape of the arm, making the restraint strap fit the arm more closely and reducing friction irritation to the body being contacted. At the same time, the compression effect provided by the elastic fabric also ensures the stability of the counterweight 4, avoiding discomfort caused by hard materials to the body being contacted. The use of elastic fabric allows the pocket 11 to accommodate counterweights 4 of different sizes, increasing the adjustability of the arm restraint strap. Regardless of the size of the counterweight 4, the pocket 11 can always maintain effective wrapping and appropriate compression of the counterweight 4 through the stretching or contraction of the elastic fabric.

[0049] The counterweight 4 is secured by pressing the inner side of pocket 11 against a buckle of protrusion 41. The elastic fabric ensures stability of the counterweight 4 while also providing enhanced comfort. The elastic fabric helps distribute pressure, reducing localized pressure and making the user more comfortable while wearing the restraint strap, while also providing greater flexibility during movement or posture changes. The elastic fabric adjusts flexibly according to arm movements, ensuring the pocket 11 maintains a proper tightness throughout the wearing process. The pressing effect on the counterweight 4 improves the evenness of the weight distribution, ensuring the arm restraint strap maintains effective restraint and does not loosen or fail over time. The elastic fabric not only offers good comfort but also high durability, withstanding repeated stretching and compression without damage. This material ensures the durability of the arm restraint strap during long-term use, extending the product's lifespan.

[0050] like Figure 6 As shown, in an optional embodiment of the utility model, the protrusion 41 is an inclined protrusion, and the height of the protrusion 41 gradually decreases in the direction of the bottom of the pocket 11.

[0051] By designing an inclined boss structure, a tighter fit can be achieved when the counterweight 4 is inserted into the pocket 11. When the counterweight 4 contacts the inclined boss 41, the inclined angle of the boss helps to stably fix the counterweight 4 inside the pocket 11, reducing the possibility of displacement due to external forces or movement during use, and further improving the stability of the arm restraint strap. As the height of the protrusion 41 gradually decreases towards the bottom of the pocket 11, the contact force between the counterweight 4 and the bottom of the pocket 11 is gradually enhanced, allowing the counterweight 4 to better form appropriate pressure contact with the bottom of the pocket when inserted, ensuring that the counterweight 4 will not loosen or slip out, thereby improving the fixing effect of the counterweight 4. The inclined boss allows the counterweight 4 to engage more smoothly when inserted into the pocket 11, and it is also more convenient to remove. Due to the gradually decreasing height of the boss, the insertion and removal of the counterweight 4 is smoother, and users can more easily add or remove the counterweight 4, improving the ease of use of the restraint strap.

[0052] like Figure 2 and Figure 4 As shown, in an optional embodiment of the utility model, the fixing belt 5 includes a drum 51 and a strip belt 52. The first end of the strip belt 52 is wound inside the drum 51. The strip belt 52 can extend outward or retract into the drum 51. The drum 51 is connected to the belt body 1.

[0053] By incorporating the reel 51, the first end of the strip 52 can be easily rolled up or extended, allowing the user to readily adjust the length of the arm restraint strap as needed. This elasticity enables the restraint strap to adapt to different arm sizes, providing a more flexible and personalized wearing experience. The strip 52 can be rolled back into the reel 51, avoiding the excessive space occupied by traditional fixing straps 5 after use. The reel 51 allows the arm restraint strap to be compactly stored when not in use, facilitating storage and portability, making it particularly suitable for occasions requiring easy portability.

[0054] The combination of the reel 51 and the strip 52 simplifies the use of the arm restraint strap. Users can easily pull out the strip 52 for securing as needed, and when retracting, a gentle pull on the reel 51 will automatically retract the strip 52, reducing operational steps and improving convenience and efficiency. The strip 52 remains neatly arranged within the reel 51 during extension and retraction, preventing tangling or knotting and ensuring greater stability and reliability during use. The connection between the reel 51 and the strap body 1 increases the stability of the strap 5, preventing loosening or slippage due to external forces. Because the strip 52 can be retracted into the reel 51, external wear and tear are reduced, effectively extending the lifespan of the arm restraint strap. The design of the reel 51 also prevents friction between the strip 52 and the external environment, reducing the risk of aging, damage, or deformation.

[0055] like Figure 5 and Figure 7 As shown, in an optional embodiment of the utility model, the fixing strap 5 further includes a fixing clip 53, which is disposed on the second end of the strip 52.

[0056] By attaching the fixing clip 53 to the second end of the strip 52, the strip 52 can be effectively secured in the desired position, such as a patient bed frame, preventing it from loosening or slipping during use. This ensures greater stability of the arm restraint strap during wear, enhancing user safety and comfort. The fixing clip 53 provides a simple and quick fixation method, allowing users to quickly secure the strip 52 in the appropriate position without cumbersome procedures. It is particularly suitable for situations requiring rapid donning or adjustment, greatly improving efficiency. The fixing clip 53 ensures the second end of the strip 52 is firmly secured, preventing discomfort caused by excessively loose or uneven pressure distribution during wear. Users can enjoy a more even pressure distribution while wearing the strap, increasing comfort.

[0057] The function of the retaining clip 53 is to firmly secure the second end of the strip 52, preventing it from slipping or shifting during activity or movement. This not only ensures the stability of the arm restraint strap when worn but also reduces discomfort or compromised restraint effectiveness caused by strap slippage. The retaining clip 53 can be adjusted to meet different wearing needs, allowing the arm restraint strap to better adapt to various usage scenarios. Whether a tight fixation or a slightly loose fit is required, the retaining clip 53 provides precise adjustment, enhancing the adaptability and versatility of the arm restraint strap.

[0058] like Figure 2 and Figure 4 As shown, in an optional embodiment of the utility model, an amplitude sensor 6 is also included. The amplitude sensor 6 is disposed on the belt body 1 and is used to sense the swing amplitude of the belt body 1.

[0059] By incorporating amplitude sensor 6, the swing amplitude of the strap 1 can be sensed in real time, monitoring the dynamic performance of the restraint strap during wear. This allows the arm restraint strap to adjust promptly according to the patient's arm condition, ensuring it remains in optimal condition and improving stability and comfort during wear. By sensing the swing amplitude of the strap 1, amplitude sensor 6 can detect any abnormal movement or swing, such as abnormal range of motion or sudden violent movements of the wearer's arm. This immediate feedback helps to promptly identify potential safety hazards and prevent unnecessary injury or discomfort. The addition of amplitude sensor 6 endows the arm restraint strap with certain intelligent functions. By monitoring the swing amplitude of the strap 1, the system can analyze the wearer's activities and adjust the tightness of the restraint strap or provide feedback according to specific needs. For example, when the wearer performs certain violent movements, the system can sense this through the sensor and remind the wearer to take appropriate measures.

[0060] The sensor can accurately detect the swing amplitude of the strap 1, providing personalized feedback to the wearer. For example, if the swing amplitude of the restraint strap exceeds the preset range, the sensor can trigger an alert or automatically adjust the tightness of the restraint strap to ensure that the wearer feels comfortable and safe in any situation.

[0061] like Figure 2 and Figure 4 As shown, in an optional embodiment of the utility model, an alarm 2 is also included. The alarm 2 is installed on the belt body 1. When the amplitude sensor 6 senses that the swing amplitude of the belt body 1 exceeds the set value, the alarm 2 will sound an alarm.

[0062] When the amplitude sensor 6 detects that the swing amplitude of the belt 1 exceeds the set value, the alarm 2 can immediately sound an alarm, alerting the wearer or supervisor to the abnormal situation and ensuring timely action. The alarm 2's warning function effectively prevents excessive activity or abnormal movement, reducing potential injury risks and ensuring the wearer's safety. The alarm 2, used in conjunction with the amplitude sensor 6, can automatically monitor the wearer's activities, reducing manual intervention and improving the real-time nature and efficiency of the monitoring process.

[0063] like Figure 8 As shown, in an optional embodiment of the utility model, the fixing strap 5 is made of an elastic material. The elastic material better adapts to the wearer's arm movements, providing a more comfortable wearing experience and reducing discomfort caused by the fixing strap 5 being too tight or too loose. The elastic material has strong tensile and deformation resistance, effectively extending the service life of the fixing strap 5 and maintaining its functionality and appearance. The softness of the elastic material can provide cushioning when necessary, reducing pressure on the body and lowering the risk of injury to the wearer.

[0064] like Figure 1 and Figure 3 As shown, in an optional embodiment of the utility model, multiple pockets 11 are evenly arranged along the length of the strap body 1, with the opening of the pocket 11 perpendicular to the length of the strap body 1. The even arrangement of multiple pockets 11 on the strap body 1 provides more storage space for small items, increasing the versatility and practicality of the arm restraint strap. The perpendicularity of the pocket opening to the length of the strap body 1 helps to distribute the pressure of the restraint strap, avoiding excessive local pressure and improving wearing comfort. The arrangement of multiple pockets 11 increases the structural stability of the strap body 1, helping to maintain the shape and function of the restraint strap and preventing deformation or discomfort during wear.

[0065] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. An arm restraint strap, characterized by, include: The belt body has a counterweight cavity inside, which is filled with counterweight sand. The belt body has multiple pockets. The two ends of the belt body are respectively provided with a hook and loop fastener and a hook and loop fastener. When the hook and loop fastener match the hook and loop fastener, the belt body is connected end to end, and the multiple pockets are located on the outer surface of the belt body. A zipper is provided on the counterweight cavity, and when the zipper is open, the counterweight cavity is connected to the outside. Multiple counterweights, wherein the counterweights are detachably disposed within the pocket; A fixing strap is connected to the strap body.

2. The arm restraint of claim 1, wherein, The inner side of the pocket has a groove, and the side of the counterweight has a protrusion that matches the groove. The length of the counterweight is greater than the depth of the pocket.

3. The arm restraint of claim 2, wherein, The pocket is made of elastic fabric, and the inner side of the pocket presses against the counterweight.

4. The arm restraint strap according to claim 2, characterized in that, The protrusion is an inclined protrusion, and the height of the protrusion gradually decreases towards the bottom of the pocket.

5. The arm restraint of claim 1, wherein, The fixing belt includes a drum and a strip belt. The first end of the strip belt is wound inside the drum. The strip belt can extend outward or retract into the drum. The drum is connected to the belt body.

6. The arm restraint of claim 5, wherein, The fixing belt also includes a fixing clip, which is disposed on the second end of the strip belt.

7. The arm restraint of claim 1, wherein, It also includes an amplitude sensor, which is disposed on the belt and is used to sense the swing amplitude of the belt.

8. The arm restraint of claim 7, wherein, It also includes an alarm, which is installed on the belt. When the amplitude sensor detects that the swing amplitude of the belt exceeds a set value, the alarm will sound an alarm.

9. The arm restraint of claim 1, wherein, The fixing strap is made of elastic material.

10. The arm restraint of claim 1, wherein, The multiple pockets are evenly arranged along the length of the belt, and the opening of the pocket is perpendicular to the length of the belt.