Arm sleeves that assist arm movement

Abstract

Previous preventative or rehabilitative devices or clothing have attempted to provide compression, such as sleeves that fit snugly to the elbow, or to restrict arm movement. However, these methods have focused more on structural support of the elbow than on actively assisting the arm and shoulder muscles to stabilize the UCL and reduce valgus and varus stress. [Solution] The arm sleeve 100 provides external support to the user's arm 106 and shoulder during arm movements such as throwing. One example of an arm sleeve includes a structure configured to support at least one muscle supporting the ulnar collateral ligament (UCL) of the user's arm and at least one muscle supporting the glenoid-humeral joint of the user's shoulder during arm movements. The structure includes a plurality of fixing plates 118, 120, 122 and elastic bands 124, 132, 134.

Description

Technical Field

[0001] (Cross - reference to related applications) This application claims the benefit of U.S. Provisional Application No. 63 / 608,862, filed on December 12, 2023, the entire content of which is incorporated herein by reference.

[0002] This disclosure relates to various implementations of an arm sleeve that externally assists the arm and shoulder during arm movement.

Background Art

[0003] Arm movements such as an overhead throw during baseball pitching generally include a wind - up motion, arm acceleration, ball release, and follow - through. When accelerating or following through, valgus and varus torques occur, and valgus and varus forces are applied to the soft tissues inside the elbow, including the medial collateral ligament, especially the ulnar collateral ligament (UCL).

[0004] When large valgus and varus loads, such as those resulting from repeated intense throwing or pitching, are applied to the elbow, it can cause injuries to the UCL, such as excessive elongation, wear, and rupture. The UCL can be damaged by acute ligament rupture or repeated stress due to overuse. For example, repeated valgus and varus stresses caused by repeated throwing can result in tissue damage beyond the tissue's self - repair ability, leading to overuse injuries. In children, such repeated stresses may manifest as "Little League elbow," which may cause medial epicondylitis or stress fractures at the medial epicondyle.

[0005] Because the ulnar collateral ligament (UCL), along with the lateral collateral ligament (LCL), is primarily responsible for elbow stability, injuries to the UCL can be particularly problematic. If the UCL is injured or damaged and does not heal properly, the elbow may become loose and / or unstable, leading to further injuries. In such cases, it may be necessary to undergo the correct surgery, such as Tommy John surgery, to repair the UCL.

[0006] Generally, preventative or rehabilitative devices or clothing to date have attempted to provide compression, such as sleeves that fit snugly to the elbow, or to restrict arm movement. However, these methods have focused more on structural support of the elbow than on actively assisting the arm and shoulder muscles to stabilize the UCL and reduce valgus and varus stress.

[0007] Therefore, there is a need for arm sleeves as disclosed herein. The present invention relates to an arm sleeve configured to provide external support to the arm and shoulder during arm movement in order to address these and other needs. [Overview of the project]

[0008] Please understand that this summary is not a comprehensive overview of the disclosure. This summary is illustrative and not limiting, and is not intended to identify or define the main or important elements of the disclosure. The sole purpose of this summary is to explain and illustrate certain concepts of the disclosure as an introduction to the full and extensive detailed explanation provided below.

[0009] Various implementations of an arm sleeve that provides external support to the user's arm and shoulder during arm movements such as throwing are disclosed. The arm sleeve is configured to reduce the force applied to the elbow joint at the end of the cocking phase of an overhead throw. Specifically, the arm sleeve reduces the tensile force applied to the inside of the elbow and the compressive force applied to the outside of the elbow. In addition, the arm sleeve is configured to assist in the start of the acceleration phase of an overhead throw by providing elastic support to the shoulder joint. Furthermore, the arm sleeve provides elastic resistance during the deceleration and follow-through phases of an overhead throw, reducing eccentric contraction of the shoulder's external rotator muscles. The arm sleeve is also configured to assist in the transition of the forearm and hand from supination to pronation during a throwing motion.

[0010] An example arm sleeve comprises a torso portion configured to be attached to the user's torso, an arm portion configured to cover at least a portion of the user's arm, and a structure including a plurality of fixing plates and elastic bands. The plurality of fixing plates include a first fixing plate, which is attached to the torso portion and extends from the front of the torso portion across the top of the user's shoulder to the rear of the torso portion. The plurality of fixing plates include a second fixing plate, which is attached to the arm portion and positioned to overlap at least a portion of the triceps brachii and deltoid muscles of the user's arm. The plurality of fixing plates include a third fixing plate, which is attached to the arm portion and positioned to partially surround the forearm of the arm when the arm sleeve is worn. The elastic band includes a first elastic band having a first end that extends from a portion of the first fixing plate that overlaps the front of the torso portion to a second end that is attached to the second fixing plate. The elastic band includes a second elastic band having a first end that extends from a portion of a first fixing plate that overlaps the user's shoulder to a second end that is attached to a second fixing plate. The elastic band includes a third elastic band having a first end that extends from a portion of a first fixing plate that overlaps the rear of the torso to a second end that is attached to a second fixing plate. The elastic band includes a fourth elastic band having a first end that extends from the second fixing plate, crossing the area of ​​the triceps brachii muscle of the arm, passing through the elbow joint, and extending posteriorly to a second end that is attached to a third fixing plate. The elastic band includes a fifth elastic band having a first end that extends from the second fixing plate, spiraling posteriorly across the area of ​​the triceps brachii muscle of the arm, passing through the elbow joint, continuing anteriorly, and extending to a second end that is attached to a third fixing plate. The first, second, and third fixing plates each function as fixing points for one or more elastic bands of the structure.

[0011] In some implementation embodiments, the elastic band of the arm sleeve includes a sixth elastic band having a first end that extends from a second fixing plate, spiraling backward across the triceps brachii region of the arm, through the elbow joint, and continuing forward to a second end that is attached to a third fixing plate. [Brief explanation of the drawing]

[0012] [Figure 1] Figure 1 is a front view of an arm sleeve that provides assistance during arm movement, showing the worn state of the arm sleeve.

[0013] [Figure 2] Figure 2 is a side view of the arm sleeve shown in Figure 1.

[0014] [Figure 3] Figure 3 is a rear view of the arm sleeve shown in Figure 1.

[0015] [Figure 4] Figure 4 is a front elevation view of the arm sleeve shown in Figure 1. The arm sleeve is laid flat, and for clarity of disclosure, the torso strap is removed.

[0016] [Figure 5] Figure 5 is a rear elevation view of the arm sleeve shown in Figure 4.

[0017] [Figure 6] Figure 6 is a top view (plan view) of the arm sleeve shown in Figure 4.

[0018] [Figure 7] Figure 7 is a bottom view (underside view) of the arm sleeve shown in Figure 4.

[0019] [Figure 8] Figure 8 is a left elevation view of the arm sleeve shown in Figure 4.

[0020] [Figure 9] Figure 9 is a right elevation view of the arm sleeve shown in Figure 4.

[0021] [Figure 10]Figure 10 is a front elevation view of the torso strap shown in Figure 1, which is used to position an arm sleeve on a person's torso. Ellipsis marks of length are shown by a pair of adjacent lines located at the center.

[0022] [Figure 11] Figure 11 is a rear elevation view of the torso strap shown in Figure 10.

[0023] [Figure 12] Figure 12 is a side elevation view of the torso strap shown in Figure 10.

[0024] The same reference numerals indicate corresponding parts throughout the drawings.

BEST MODE FOR CARRYING OUT THE INVENTION

[0025] Movements of the arm such as an overhead throw motion during baseball pitching generally include a wind-up motion, arm acceleration, ball release, and follow-through. As other similar arm movements, there are also swing motions in tennis, handball, volleyball, etc., which generally include a wind-up motion, arm acceleration, ball hitting, and follow-through. When accelerating the arm or following through, valgus and varus torques occur, and valgus and varus forces are applied to the soft tissues inside the elbow, particularly to the medial collateral ligament (MCL), also known as the ulnar collateral ligament (UCL).

[0026] Figures 1 to 9 show an example of an arm sleeve 100 relating to the principle of this disclosure. The arm sleeve 100 is configured to reduce the force applied to the arm joint at the end of the cocking phase of the overhead throw motion. Specifically, the arm sleeve 100 reduces the tensile force applied to the inside of the elbow and the compressive force applied to the outside of the elbow. In addition, the arm sleeve 100 is configured to assist in the start of the acceleration phase of the overhead throw motion by elastically assisting the shoulder joint. Furthermore, the arm sleeve 100 provides elastic resistance during the deceleration and follow-through phases of the overhead throw motion, reducing the load of eccentric contraction on the external rotator muscles of the shoulder. The arm sleeve 100 is also configured to assist in the transition from supination to pronation of the forearm and hand during the throwing motion.

[0027] As shown in Figures 1 to 3, the arm sleeve 100 is configured to be worn on the throwing arm 106 of the user 102. While the embodiments of the arm sleeve 100 shown in Figures 1 to 3 are configured to be worn on the right arm 106, the arm sleeve 100 may be configured and applied to be worn on the left arm if desired.

[0028] As shown in Figures 1 to 5, the arm sleeve 100 includes a torso portion 110 configured to be attached to the torso 104 of the user 102 when worn, and an arm portion 112 configured to cover at least a portion of the user's throwing arm 106. In the implementations shown in Figures 1 to 3, the arm portion 112 includes a sleeve extending from below the elbow joint of the user's throwing arm 106 to the wrist, and a wrist strap 114 configured to secure the tip of the arm portion 112 to the wrist of the user's throwing arm 106. However, in other implementations, the arm portion 112 may be shorter and may not extend to the user's wrist. In addition, in some implementations, the wrist strap 114 may be omitted from the arm portion 112.

[0029] The torso 110 and arm portion 112 of the arm sleeve 100 may be made of a stretchable fabric such as spandex, or of another suitable material that provides a snug fit when the arm sleeve 100 is worn. Therefore, the material of the torso 110 and arm portion 112 may, if desired, be relatively elastic and provide a snug fit. In addition, in some implementations, the torso 110 of the arm sleeve 100 may be made of a different material, have a different thickness, have a different density, or have different elasticity than the arm portion 112 of the arm sleeve 100. Therefore, as an example, though not limited to, the torso 110 and arm portion 112 may be made of a single material such as spandex. In addition, the torso 110 and / or arm portion 112 may be provided with notches, slits, etc., to ensure breathability and / or ventilation, if desired.

[0030] As shown in Figures 1 to 5, the arm sleeve 100 includes a structure 116 configured to assist at least one muscle that supports the ulnar collateral ligament (UCL) of the user's arm 106 during arm movement. In addition, the structure 116 is also configured to assist at least one muscle that supports the glenoid-humeral joint of the user's shoulder during arm movement. The structure 116 includes a plurality of fixing plates (118, 120, 122) and elastic bands (124, 126, 128, 130, 132, 134).

[0031] As best shown in Figures 1 to 3, in some implementation embodiments, the structure 116 of the arm sleeve 100 includes three fixing plates (118, 120, 122). One of these fixing plates 118 is attached to the torso 110 and extends from the front side (front side) 110a of the torso 110, across the top of the shoulder of the throwing arm 106, to the rear side (back side) 110b of the torso 110. The other two fixing plates (120, 122) are attached to the arm 112. One of these fixing plates 120 is positioned to overlap at least part of the triceps brachii and deltoid muscles of the throwing arm 106, and the other fixing plate 122 is positioned to partially surround the forearm of the throwing arm 106 above the wrist. The fixing plates (118, 120, 122) are configured to conform to the general body parts on which they overlap and function as fixing points for the elastic bands (124, 126, 128, 130, 132, 134) of the structure 116. The fixing plates (118, 120, 122) are made of a rigid material such as non-elastic thermoplastic polyurethane (TPU). However, the fixing plates (118, 120, 122) may be made of other suitable materials or combinations of materials. In some implementations, adhesive or ultrasonic welding is used to attach the fixing plates (118, 120, 122) to the base of the arm sleeve 100.

[0032] As shown in Figures 1 and 2, in some implementations, the first elastic band 124 of the structure 116 includes a first end 124a and extends from a portion of a fixing plate 118 that overlaps the front side 110a of the torso 110 of the arm sleeve 100 to a second end 124b that is attached to a fixing plate 120 that overlaps the triceps and deltoid muscles of the throwing arm 106. The first end 124a is attached to the edge of the fixing plate 118 that overlaps the front side 110a of the torso 110, and the second end 124b is attached to the front edge of the fixing plate 120 that overlaps the triceps and deltoid muscles of the throwing arm 106. However, the first end 124a and / or the second end 124b of the first elastic band 124 may also be attached to other parts of the fixing plates (118, 120), respectively.

[0033] The first elastic band 124 of the arm sleeve 100 is configured to play an active role throughout the entire overhead throw motion. From the early cocking phase to the late cocking phase, the first elastic band 124 stretches and stores elastic energy. During these phases of the throwing motion, the user's throwing arm is in the extended, abducted, externally rotated, and horizontally abducted positions. During the early and late cocking phases, the movement of the user's throwing arm causes specific muscles to stretch and store elastic energy. Specifically, these are the internal rotator muscles of the user's shoulder (e.g., subscapularis, teres major, pectoralis major) and horizontal adductor muscles (e.g., pectoralis major). The elastic energy stored by the structure 116 of the arm sleeve 100, specifically the first elastic band 124, can then be released to contribute to the acceleration of the overhead throw motion and assist the user's muscles during shoulder rotation and horizontal adduction.

[0034] As best illustrated in Figure 2, in some implementations, the second elastic band 126 of the structure 116 includes a first end 126a and extends from a portion of the fixing plate 118 that overlaps the shoulder of the throwing arm 106 to a second end 126b that is attached to a fixing plate 120 that overlaps the triceps and deltoid muscles of the throwing arm 106. The first end 126a is attached to the end of the fixing plate 118 that overlaps the shoulder of the throwing arm 106, and the second end 126b is attached to the upper end of the fixing plate 120 that overlaps the triceps and deltoid muscles of the throwing arm 106. However, the first end 126a and / or the second end 126b of the second elastic band 126 may also be attached to other parts of the fixing plates (118, 120), respectively.

[0035] The second elastic band 126 of the arm sleeve 100 is aligned in the same direction as the supraspinatus and middle deltoid muscles of the shoulder, and is configured to reduce the concentric (shortening) muscle contraction force required for shoulder abduction during the cocking phase of the throwing motion. This is important because fatigue of the supraspinatus muscle reduces the force that properly connects the glenoid-humeral joint (shoulder joint). When the supraspinatus muscle fatigues, the deltoid muscle contraction force increases. This increase in deltoid muscle contraction force causes the glenoid-humeral joint to move upward, leading to shoulder impingement, or at least contributing to shoulder impingement.

[0036] As shown in Figures 2 and 3, in some implementations, the third elastic band 128 of the structure 116 includes a first end 128a and extends from a portion of the fixing plate 118 that overlaps the rear side 110b of the torso 110 of the arm sleeve 100 to a second end 128b attached to a fixing plate 120 that overlaps the triceps and deltoid muscles of the throwing arm 106. The first end 128a is attached to the end of the fixing plate 118 that overlaps the rear side 110b of the torso 110, and the second end 128b is attached to the rear end of the fixing plate 120 that overlaps the triceps and deltoid muscles of the throwing arm 106. However, the first end 128a and / or the second end 128b of the third elastic band 128 may also be attached to other parts of the fixing plates (118, 120), respectively.

[0037] The third elastic band 128 of the arm sleeve 100 is configured to assist the eccentrically contracting muscles (e.g., posterior deltoid, teres minor, lower trapezius, infraspinatus, and rhomboids) during the deceleration phase of the throwing motion by preventing excessive extension of the user's throwing arm. The third elastic band 128 stretches (extends) as the user's throwing arm flexes and the shoulder rotates.

[0038] As shown in Figures 1 to 3, in some implementations, the fourth elastic band 130, fifth elastic band 132, and sixth elastic band 134 of the arm sleeve 100 each include a first end (130a, 132a, 134a) and extend from a fixing plate 120 that overlaps the triceps and deltoid muscles of the throwing arm 106 to a second end (130b, 132b, 134b) attached to a fixing plate 122 that is configured to partially wrap around the forearm of the throwing arm 106. The fourth elastic band 130 is configured to extend from the fixing plate 120, across the triceps region of the arm, through the elbow joint, and posteriorly to a second end (see, for example, Figure 2). The fifth and sixth elastic bands (132 and 134) are configured to extend spirally posteriorly from the fixing plate 120, across the triceps brachii muscle area of ​​the arm, through the elbow joint, and forward to a second end (see, for example, Figures 1 and 3).

[0039] As best illustrated in Figure 2, the first end 130a of the fourth elastic band 130 is attached to the first lower end of the fixing plate 120, which is superimposed on the triceps and deltoid muscles of the throwing arm 106, and the second end 130b is attached to the upper end of the fixing plate 122, which is partially wrapped around the forearm of the throwing arm 106. However, the first end 130a and / or the second end 130b of the fourth elastic band 130 may also be attached to other parts of the fixing plates (120, 122), respectively.

[0040] As best illustrated in Figures 1 and 3, the first end 132a of the fifth elastic band 132 is attached to the second lower end of the fixing plate 120, which is superimposed on the triceps and deltoid muscles of the throwing arm 106, and the second end 132b is attached to the upper end of the fixing plate 122, which is partially wrapped around the forearm of the throwing arm 106. However, the first end 132a and / or the second end 132b of the fifth elastic band 132 may also be attached to other parts of the fixing plates (120, 122), respectively.

[0041] As best illustrated in Figures 1 and 3, the first end 134a of the sixth elastic band 134 is also attached to the second lower end of the fixing plate 120, which is superimposed on the triceps and deltoid muscles of the throwing arm 106, and the second end 134b is attached to the upper end of the fixing plate 122, which is partially wrapped around the forearm of the throwing arm 106. However, the first end 134a and / or the second end 134b of the sixth elastic band 134 may also be attached to other parts of the fixing plates (120, 122), respectively.

[0042] The first elastic band 124, the fifth elastic band 132, and the sixth elastic band 134 are all configured to minimize the amount of valgus torque and varus torque applied to the medial and lateral soft tissues of the elbow joint.

[0043] The first elastic band 124, the fourth elastic band 130, the fifth elastic band 132, and the sixth elastic band 134 are all configured to limit the maximum external rotation of the shoulder at the peak of the late cocking phase, and to contribute to reducing the (medial) tensile force and (lateral) compressive force applied to the elbow joint. In addition, the elastic band (124) that crosses the glenoid-humeral joint plays a role in actively restricting the shoulder and elbow during the late cocking phase of throwing.

[0044] Although not shown in the figures, in some implementations, the sixth elastic band 134 may be omitted, or a single elastic band may be used that replaces both the fifth elastic band 132 and the sixth elastic band 134.

[0045] In some implementations, the elastic bands (124, 126, 128, 130, 132, 134) of the structure 116 are made of an elastic material such as silicone rubber. The tensile strength of the elastomer used to form the elastic bands (124, 126, 128, 130, 132, 134) of the structure 116 will affect (for example, increase or decrease) the speed of the user's pitching or swing. In some implementations, the elastic bands (124, 126, 128, 130, 132, 134) of the arm sleeve 100 may be made of an elastic material other than silicone rubber.

[0046] The elastic bands (124, 126, 128, 130, 132, 134) of structure 116 can have any desired width, thickness, or elasticity. For example, the width, thickness, and elasticity of the elastic bands (124, 126, 128, 130, 132, 134) of the arm sleeve 100 may be varied depending on the size, age, gender, and severity of the injury of the user. In some implementation embodiments, the elastic bands (124, 126, 128, 130, 132, 134) of structure 116 may be made of different materials, have different thicknesses or widths, or have the same or different elasticity (modulus of elasticity), as desired.

[0047] Although not shown in the figures, in some implementations, each end (e.g., 124a, 124b) of the elastic band (e.g., 124, etc.) can be detachably attached to each fixing plate (e.g., 118, 120). This method allows the tension applied by the band (e.g., 124, etc.) to be changed. Such attachment methods also allow the user to replace the band with another band of different material, thickness, width, or elasticity (modulus of elasticity) of the same or different type, as desired. In some implementations, the first and / or second ends of the elastic band may be attached to each fixing plate by a hook-and-loop fastener mechanism. For example, hooks may be provided on the first end 124a and / or the second end 124b of the first band 124, and loop pile fabric may be provided on at least part of each fixing plate (118, 120).

[0048] As shown in Figures 1 to 5, the wrist strap 114 is attached to the end of the forearm portion 113 of the arm sleeve 100 and includes a tab 136 on its end. The wrist strap 114 is configured to wrap around the wrist of the user 102, and the tab 136 is detachably fastened to the end of the forearm portion 113. In some implementations, a hook-and-loop fastener may be used to fasten the tab 136 of the wrist strap 114 to the end of the forearm portion 113. For example, the tab 136 may include a loop pile fabric configured to hook onto an adjacent hook 138 at the end of the arm portion 112. When in use, the wrist strap 114 is wrapped around the wrist of the user 102, and once it fits as desired, the tab 136 is fastened to the end of the forearm portion 113 by the hook-and-loop fastener. In this method, the user 102 can adjust the fit of the forearm portion 113 when wearing the arm sleeve 100. In some implementations, another fastener or fastening mechanism, such as a snap or button, may be used to secure the tab 136 of the wrist strap 114 to the tip of the forearm portion 113.

[0049] As shown in Figures 1 to 3, in some implementations, the arm sleeve 100 also includes a torso strap 140 used to position on the torso 110 on the torso 104 of the user 102. The torso strap 140 extends between an attachment point 111a on the front side 110a of the torso 110 and an attachment point 111b on the rear side 110b of the torso 110. When the arm sleeve 100 is worn, the loop formed by the torso strap 140 is positioned between the user's arm and the torso 104.

[0050] Figures 10 to 12 show a torso strap 140 used to position the arm sleeve 100 on the torso 104 of the user 102, which includes a pair of adjacent lines located in the center to indicate that it is not specified for a particular length. Each end (140a, 140b) of the torso strap 140 can be secured to the corresponding attachment positions (111a, 111b) using hook-loop fasteners. In particular, the first end 140a and the second end 140b of the torso strap 140 each include a hook configured to hook onto the loops at the attachment positions (111a, 111b) on the torso 110. However, the arrangement may be changed so that the loops are on the ends (140a, 140b) of the torso strap 140 and the hooks are on the attachment positions (111a, 111b) on the torso 110. An example of the torso 140 is made of elastic nylon material. However, in some implementation embodiments, the body portion 140 may be made of an appropriate material selected based on various implementation configurations of the arm sleeve 100 of this disclosure.

[0051] Although not shown in the diagram, in some implementations, the fixing plate 118 attached to the torso 110 of the arm sleeve 100 may consist of three separate fixing plates. In such implementations, one fixing plate is located on the front side 110a of the torso 110, another fixing plate is positioned to overlap the shoulder of the throwing arm 106, and yet another fixing plate is located on the rear side 110b of the torso 110.

[0052] The foregoing description of the invention is illustrative and not exhaustive, and is not intended to limit the claims to the exact form disclosed. Those skilled in the art will understand that many modifications and variations are possible based on the foregoing description and the accompanying drawings.

[0053] Throughout this specification, any reference to “embodiments,” “implementation,” or any similar term means that a particular described feature, structure, or characteristic is included in at least one embodiment of the present invention. Throughout this specification, any phrase “in several implementations” or similar expression does not necessarily refer to the same embodiment.

[0054] The described features, structures, or properties can be implemented in one or more embodiments in any and all appropriate combination. The above description provides many specific details to allow for a thorough understanding of the embodiments of the invention. However, a person skilled in the art will understand that embodiments of the invention can be implemented using other methods, configurations, materials, etc., without the need for one or more specific details. Another example is when known structures, materials, or operations are not shown or described in detail.

Claims

1. An arm sleeve configured to provide external support to the user's arm and shoulder during arm movement, A torso portion configured to be attached to the user's torso, An arm portion configured to cover at least a part of the user's arm, A structure including multiple fixing plates and elastic bands It is equipped with, The plurality of fixing plates include a first fixing plate, which is attached to the torso and extends from the front of the torso, across the top of the user's shoulder, to the rear of the torso. The plurality of fixing plates include a second fixing plate, which is attached to the arm and positioned to overlap at least a portion of the triceps brachii and deltoid muscles of the user's arm. The plurality of fixing plates include a third fixing plate, which is attached to the arm and positioned to partially surround the forearm of the arm when the arm sleeve is worn. The elastic band includes a first elastic band having a first end that extends from a part of the first fixing plate superimposed on the front side of the body to a second end that is attached to the second fixing plate, The elastic band includes a second elastic band having a first end that extends from a portion of the first fixing plate, which is placed over the user's shoulder, to a second end that is attached to the second fixing plate. The elastic band includes a third elastic band having a first end that extends from a part of the first fixing plate superimposed on the rear side of the body to a second end that is attached to the second fixing plate, The elastic band includes a fourth elastic band having a first end that extends from the second fixing plate across the triceps brachii region of the arm, through the elbow joint, and posteriorly to a second end that is attached to the third fixing plate. The elastic band includes a fifth elastic band having a first end that extends spirally backward from the second fixing plate across the triceps brachii region of the arm, through the elbow joint, and then forward to a second end that is attached to the third fixing plate. The arm sleeve is characterized in that the first fixing plate, the second fixing plate, and the third fixing plate each function as fixing positions for one or more of the elastic bands of the structure.

2. The arm sleeve according to claim 1, characterized in that the structure of the arm sleeve is capable of assisting at least one muscle that supports the ulnar collateral ligament (UCL) of the user's arm and at least one muscle that supports the glenoid humeral joint of the user's shoulder during arm movement.

3. The arm sleeve according to claim 1, characterized in that the first fixing plate, the second fixing plate, and the third fixing plate are each made of a rigid material and are configured to substantially conform to a large portion of the torso or arm on which they are stacked.

4. The arm sleeve according to claim 1, characterized in that the first elastic band, the second elastic band, and the third elastic band each extend separately from the first fixing plate.

5. The arm sleeve according to claim 4, characterized in that the fourth elastic band and the fifth elastic band each extend separately from the second fixing plate.

6. The arm sleeve according to claim 1, characterized in that the arm portion includes a strap configured to secure the tip of the arm portion to a part of the user's arm.

7. Furthermore, the arm sleeve according to claim 1 is further provided with a strap configured to position the torso portion of the arm sleeve on the user's torso, wherein the strap extends between the front mounting position and the rear mounting position of the torso portion.

8. An arm sleeve configured to provide external support to the user's arm and shoulder during arm movement, A torso portion configured to be attached to the user's torso, An arm portion configured to cover at least a part of the user's arm, A structure including multiple fixing plates and elastic bands It is equipped with, The plurality of fixing plates include a first fixing plate, which is attached to the torso and extends from the front of the torso, across the top of the user's shoulder, to the rear of the torso. The plurality of fixing plates include a second fixing plate, which is attached to the arm and positioned to overlap at least a portion of the triceps brachii and deltoid muscles of the user's arm. The plurality of fixing plates include a third fixing plate, which is attached to the arm and positioned to partially surround the forearm of the arm when the arm sleeve is worn. The elastic band includes a first elastic band having a first end that extends from a part of the first fixing plate superimposed on the front side of the body to a second end that is attached to the second fixing plate, The elastic band includes a second elastic band having a first end that extends from a portion of the first fixing plate, which is placed over the user's shoulder, to a second end that is attached to the second fixing plate. The elastic band includes a third elastic band having a first end that extends from a part of the first fixing plate superimposed on the rear side of the body to a second end that is attached to the second fixing plate, The elastic band includes a fourth elastic band having a first end that extends from the second fixing plate across the triceps brachii region of the arm, through the elbow joint, and posteriorly to a second end that is attached to the third fixing plate. The elastic band includes a fifth elastic band having a first end that extends from the second fixing plate, spiraling posteriorly across the triceps muscle region of the arm, through the elbow joint, and then anteriorly to a second end attached to the third fixing plate. The elastic band includes a sixth elastic band having a first end that extends spirally backward from the second fixing plate across the triceps brachii region of the arm, through the elbow joint, and then forward to a second end that is attached to the third fixing plate. The arm sleeve is characterized in that the first fixing plate, the second fixing plate, and the third fixing plate each function as fixing positions for one or more of the elastic bands of the structure.

9. The arm sleeve according to claim 8, characterized in that the structure of the arm sleeve is capable of assisting at least one muscle that supports the ulnar collateral ligament (UCL) of the user's arm and at least one muscle that supports the glenoid humeral joint of the user's shoulder during arm movement.

10. The arm sleeve according to claim 8, characterized in that the first fixing plate, the second fixing plate, and the third fixing plate are each made of a rigid material and are configured to substantially conform to a large portion of the torso or arm on which they are stacked.

11. The arm sleeve according to claim 8, characterized in that the first elastic band, the second elastic band, and the third elastic band each extend separately from the first fixing plate.

12. The arm sleeve according to claim 11, characterized in that the fourth elastic band, the fifth elastic band, and the sixth elastic band each extend separately from the second fixing plate.

13. The arm sleeve according to claim 8, characterized in that the arm portion includes a strap for securing the tip of the arm portion to a part of the user's arm.

14. Furthermore, the arm sleeve according to claim 8 is further provided with a strap configured to position the torso portion of the arm sleeve on the user's torso, wherein the strap extends between the front mounting position and the rear mounting position of the torso portion.

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