Upper extremity immobilizer, thermoplastic mesh wrap, and methods of designing the same

Abstract

The application provides an upper limb fixator, a thermoplastic mesh cover and a design method thereof. The thermoplastic mesh cover is used for covering an upper limb and comprises a fold line boundary belt and a mesh cover body. The mesh cover body comprises a plurality of first connecting strips and a plurality of second connecting strips. The plurality of first connecting strips are arranged in parallel and at equal intervals, and the plurality of second connecting strips are arranged in parallel and at equal intervals. The distance between two adjacent first connecting strips is equal to the distance between two adjacent second connecting strips. The extension direction of each first connecting strip is perpendicular to the extension direction of each second connecting strip. The thermoplastic mesh cover can prevent local stress concentration, avoid uneven tension, and avoid the influence of product thickness thinning and product pulling and breaking on fixation failure. In addition, the thermoplastic mesh cover does not need to be cut, thereby having good applicability and convenient operation.

Description

Technical Field

[0001] This invention relates to the technical field of medical devices, and in particular to an upper limb fixation device, a thermoplastic mesh covering, and a design method thereof. Background Technology

[0002] In treating patients with limb fractures, external fixation (such as plaster casts) is usually applied to the fracture site to stabilize the bones at both ends of the fracture line, thereby allowing the broken bones to heal. In recent years, malleable fracture fixation plates have been increasingly used in the treatment of fractures. Malleable fracture fixation plates are applied to the surface of the limb in a thermoplastic state and have a good fixation effect after curing.

[0003] Existing malleable fixation plates are generally designed as single sheets to meet the needs of users with different body shapes. They are cut to fit the fixation requirements during use, or multiple external fixation products of different sizes are designed for the same area to meet the size differences of different patients and the same installation site. Therefore, traditional malleable fixation plates require cutting to fit most people, which makes them inconvenient to operate. In addition, traditional fixators have many parts, and the connection between the parts is prone to failure, making the fixator unreliable and unable to meet the requirements for safe and reliable fixation of patients. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an upper limb fixation device, a thermoplastic mesh covering, and a design method thereof that have good ease of operation and reliability.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A thermoplastic mesh covering for covering an upper limb includes a zigzag boundary band and a mesh covering body. The mesh covering body includes a plurality of first connecting strips and a plurality of second connecting strips. The plurality of first connecting strips are parallel to each other and equally spaced, and the plurality of second connecting strips are parallel to each other and equally spaced. The distance between two adjacent first connecting strips is equal to the distance between two adjacent second connecting strips. The extension direction of each first connecting strip is perpendicular to the extension direction of each second connecting strip. Two adjacent second connecting strips are connected by at least one first connecting strip, and two adjacent first connecting strips are connected by at least one second connecting strip, so that the plurality of first connecting strips and the plurality of second connecting strips are connected together to form a mesh structure. The zigzag boundary band is respectively arranged around the plurality of first connecting strips and the plurality of second connecting strips. Both ends of each first connecting strip and both ends of each second connecting strip are connected to the zigzag boundary band. The mesh covering body has a fitting clearance hole for fitting onto the thumb of the upper limb when the thermoplastic mesh covering is covered.

[0007] In one embodiment, the wall of the socket clearance hole is arc-shaped between two adjacent first connecting strips.

[0008] In one embodiment, the wall of the socket clearance hole is arc-shaped between two adjacent second connecting strips.

[0009] In one embodiment, the thermoplastic mesh covering is an integrally injection-molded structure.

[0010] In one embodiment, a portion of the connection point between the first connecting strip and the second connecting strip is located on the polygonal boundary band.

[0011] In one embodiment, the portion where the first connecting strip connects to the second connecting strip has a rounded corner transition.

[0012] In one embodiment, a portion of the broken-line boundary band is parallel to the first connecting strip.

[0013] In one embodiment, a portion of the broken-line boundary band is parallel to the second connecting strip.

[0014] A universal upper limb immobilizer includes an auxiliary wrapping strap and a thermoplastic mesh covering as described in any of the above embodiments; the auxiliary wrapping strap is used to bind to the thermoplastic mesh covering when it covers the upper limb.

[0015] A design method for a thermoplastic mesh-coated part, used to design the thermoplastic mesh-coated part as described in any of the above embodiments, the design method comprising:

[0016] Data was collected from the forearms of multiple different populations to obtain multiple forearm data;

[0017] Each forearm data is edited to obtain a data model for each upper limb fixation point;

[0018] Data extraction is performed on the data model of each upper limb fixation site along the central axis at preset intervals to obtain several interface perimeter lines equidistantly set for each upper limb fixation site; wherein, the central axis is the line connecting the middle finger of the data model to a preset position near the elbow crease, and the intersection of the vertical plane passing through the central axis with each interface perimeter line is used to obtain the first dividing point and the second dividing point, and each interface perimeter line is divided into the radial line and the ulnar line;

[0019] For each of the interface perimeter lines of the multiple upper limb fixation sites, the radial side line and the corresponding ulnar side line are summed and averaged to obtain several radial side average lines and corresponding ulnar side average lines of the upper limb fixation sites; wherein, the radial side average line is the average value of the corresponding radial side lines of the interface perimeter lines at the same position of the data model of the multiple upper limb fixation sites, and the ulnar side average line is the average value of the corresponding ulnar side lines of the interface perimeter lines at the same position of the data model of the multiple upper limb fixation sites.

[0020] Using the central axis as a reference line, the radial and ulnar average lines of each interface perimeter of the upper limb fixation part are spread out and distributed on both sides of the central axis, so that multiple interface perimeter lines are fitted on the same plane and are equidistantly set at the preset interval.

[0021] By sequentially connecting and fitting the first or second boundary points adjacent to the perimeter lines of multiple interfaces, the perimeter fitting outline of the thermoplastic mesh covering is obtained.

[0022] The perimeter fitting outline of the thermoplastic mesh-covered part is optimized and filled with a square mesh to obtain a semi-finished product of the thermoplastic mesh-covered part.

[0023] The boundaries of the thermoplastic mesh-coated semi-finished product are optimized to obtain the thermoplastic mesh-coated part.

[0024] Compared with the prior art, the present invention has at least the following advantages:

[0025] 1. The aforementioned thermoplastic mesh covering, due to the parallel and equally spaced arrangement of multiple first connecting strips and multiple parallel and equally spaced second connecting strips, the distance between two adjacent first connecting strips is equal to the distance between two adjacent second connecting strips, the extension direction of each first connecting strip is perpendicular to the extension direction of each second connecting strip, and since two adjacent second connecting strips are connected by at least one first connecting strip and two adjacent second connecting strips are connected by at least one second connecting strip, the multiple first connecting strips and multiple second connecting strips are connected together to form a mesh structure. The zigzag boundary bands are respectively arranged around the multiple first connecting strips and multiple second connecting strips, and each mesh unit of the mesh structure is a square mesh unit. In addition, the zigzag boundary bands are arranged around the periphery of the main body of the mesh covering, and both ends of each first connecting strip and both ends of each second connecting strip are connected to the zigzag boundary bands. In use, the thermoplastic mesh covering can be softened by heating with hot water and then attached to the upper limb. Then, the auxiliary wrapping tape is tied to the thermoplastic mesh covering when the thermoplastic mesh covering is wrapped around the upper limb to achieve fixation.

[0026] 2. Because multiple first connecting strips are parallel and equally spaced, and multiple second connecting strips are parallel and equally spaced, the distance between two adjacent first connecting strips is equal to the distance between two adjacent second connecting strips. The extension direction of each first connecting strip is perpendicular to the extension direction of each second connecting strip. That is, each grid unit of the grid structure is a square grid unit. This allows the thermoplastic mesh covering to not only be stretched vertically and horizontally, especially after being heated and softened, but also to have more uniform stress on the solid edges of each grid unit of the thermoplastic mesh covering. This ensures that the deformation of each part of the thermoplastic mesh covering is more consistent when stretched according to actual needs, preventing local stress concentration and avoiding uneven tension that could lead to thinning of the product, product breakage, or other fixation failures. Furthermore, no cutting is required, thus giving the thermoplastic mesh covering better applicability and ease of operation. The thermoplastic mesh covering has fewer parts, greatly reducing the possibility of connection failures between parts and resulting in better structural reliability. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the installation of a universal upper limb fixator according to one embodiment;

[0029] Figure 2 for Figure 1 A schematic diagram of the thermoplastic mesh covering of the universal upper limb fixation device shown;

[0030] Figure 3 for Figure 2 The diagram shown illustrates the application of the thermoplastic mesh-covered component.

[0031] Figure 4 for Figure 2 A schematic diagram showing the left and right stretching of the thermoplastic mesh-covered part;

[0032] Figure 5 for Figure 4 A schematic diagram of the structural deformation at point A of the thermoplastic mesh-coated component under stress.

[0033] Figure 6 A flowchart illustrating the design method of a universal upper limb immobilizer according to one embodiment;

[0034] Figure 7 This is a schematic diagram of forearm data obtained from data acquisition in one of the forearms.

[0035] Figure 8 To Figure 7 A schematic diagram of the data model for editing forearm data;

[0036] Figure 9 To Figure 8 A schematic diagram of several interface perimeter lines obtained by extracting data from the model shown.

[0037] Figure 10 The perimeter fitting outline of the thermoplastic mesh-covered part obtained after fitting;

[0038] Figure 11 This is a schematic diagram showing the optimization of the perimeter fitting outline of the thermoplastic mesh covering of the universal upper limb fixation device, and the filling of a square mesh. Detailed Implementation

[0039] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0040] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] This application provides a thermoplastic mesh covering for covering an upper limb. The thermoplastic mesh covering includes a zigzag boundary band and a mesh covering body. The mesh covering body includes a plurality of first connecting strips and a plurality of second connecting strips. The plurality of first connecting strips are parallel to each other and equally spaced, and the plurality of second connecting strips are parallel to each other and equally spaced. The distance between two adjacent first connecting strips is equal to the distance between two adjacent second connecting strips. The extension direction of each first connecting strip is perpendicular to the extension direction of each second connecting strip. Two adjacent second connecting strips are connected by at least one first connecting strip, and two adjacent first connecting strips are connected by at least one second connecting strip, so that the plurality of first connecting strips and the plurality of second connecting strips are connected together to form a mesh structure. The zigzag boundary band is respectively arranged around the plurality of first connecting strips and the plurality of second connecting strips. Both ends of each first connecting strip and both ends of each second connecting strip are connected to the zigzag boundary band. The mesh covering body has a sleeve clearance hole for sleeved around the thumb of the upper limb when the thermoplastic mesh covering is covered.

[0043] The aforementioned thermoplastic mesh covering, with multiple first connecting strips arranged parallel and equally spaced, and multiple second connecting strips arranged parallel and equally spaced, where the distance between two adjacent first connecting strips is equal to the distance between two adjacent second connecting strips, and the extension direction of each first connecting strip is perpendicular to the extension direction of each second connecting strip, and since two adjacent second connecting strips are connected by at least one first connecting strip, forms a mesh structure. The zigzag boundary bands surround the multiple first and second connecting strips, and each mesh unit is a square mesh unit. The zigzag boundary bands surround the periphery of the main body of the mesh covering, and both ends of each first and second connecting strip are connected to the zigzag boundary bands. During use, the thermoplastic mesh covering can be heated with hot water. After softening, the thermoplastic mesh covering is attached and wrapped around the upper limb. An auxiliary wrapping tape is then tied to the thermoplastic mesh covering as it is wrapped around the upper limb for fixation. Because each grid unit of the mesh structure is a square grid unit, the thermoplastic mesh covering, especially after heating and softening, can be stretched vertically and horizontally. Furthermore, the stress on the solid edges of each grid unit is relatively uniform, resulting in consistent deformation when stretched according to actual needs. This prevents localized stress concentration and avoids uneven tension leading to thinning, breakage, or other fixation failures. No cutting is required, thus making the thermoplastic mesh covering highly adaptable and easy to operate. The thermoplastic mesh covering has fewer components, greatly reducing the risk of connection failures and ensuring good structural reliability.

[0044] To better understand the technical solution and beneficial effects of this application, the following detailed description is provided in conjunction with specific embodiments:

[0045] like Figure 1 and Figure 2 As shown, a universal upper limb immobilizer 10 of one embodiment is used to immobilize a fractured part of the upper limb. Further, the universal upper limb immobilizer 10 includes an auxiliary wrapping strap 100 and a thermoplastic mesh covering 200; the thermoplastic mesh covering 200 is used to cover the upper limb. The auxiliary wrapping strap 100 is used to bind to the thermoplastic mesh covering 200 when it is covering the upper limb.

[0046] like Figure 1 and Figure 2As shown, the thermoplastic mesh covering 200 further includes a zigzag boundary strip 210 and a mesh covering body 220. The mesh covering body 220 includes a plurality of first connecting strips 222 and a plurality of second connecting strips 224. The plurality of first connecting strips 222 are parallel to each other and equally spaced, that is, any two adjacent first connecting strips 222 are parallel to each other and the distance between any two adjacent first connecting strips 222 is equal. The plurality of second connecting strips 224 are parallel to each other and equally spaced, that is, any two adjacent second connecting strips 224 are parallel to each other and the distance between any two adjacent second connecting strips 224 is equal.

[0047] like Figure 1 and Figure 2 As shown, further, the distance between two adjacent first connecting strips 222 is equal to the distance between two adjacent second connecting strips 224, and the extension direction of each first connecting strip 222 is perpendicular to the extension direction of each second connecting strip 224. Two adjacent second connecting strips 224 are connected by at least one first connecting strip 222, and two adjacent first connecting strips 222 are connected by at least one second connecting strip 224, so that multiple first connecting strips 222 and multiple second connecting strips 224 are connected together to form a mesh structure. In this embodiment, the mesh structure includes multiple mesh units 221, and each mesh unit is a square mesh unit. Each first connecting strip 222 is perpendicularly connected to at least one second connecting strip 224. Since two adjacent second connecting strips 224 are connected through at least one first connecting strip 222, and two adjacent first connecting strips 222 are connected through at least one second connecting strip 224, multiple first connecting strips 222 and multiple second connecting strips 224 together form multiple grid units. The grid units located at the edge of the grid covering body 220 are at least semi-closed grid units. The so-called semi-closed grid unit is a non-standard square grid unit, such as cutting half along one of the diagonals of a square grid unit.

[0048] like Figure 1 and Figure 2 As shown, further, the zigzag boundary band 210 is respectively arranged around the plurality of first connecting strips 222 and the plurality of second connecting strips 224. Both ends of each first connecting strip 222 and both ends of each second connecting strip 224 are connected to the zigzag boundary band 210, so that the thermoplastic mesh covering 200 forms a closed mesh structure. The mesh covering body 220 is formed with a sleeve clearance hole 225, which is used to sleeve the thumb of the upper limb when the thermoplastic mesh covering 200 covers the upper limb.

[0049] The aforementioned universal upper limb fixator 10 and its thermoplastic mesh covering 200, in which multiple first connecting strips 222 are arranged parallel to each other and at equal intervals, and multiple second connecting strips 224 are arranged parallel to each other and at equal intervals, the distance between two adjacent first connecting strips 222 is equal to the distance between two adjacent second connecting strips 224, the extension direction of each first connecting strip 222 is perpendicular to the extension direction of each second connecting strip 224, and since two adjacent second connecting strips 224 are connected by at least one first connecting strip 222, and two adjacent second connecting strips 224 are connected by at least one second connecting strip 224, the multiple first connecting strips 222 and the multiple second connecting strips 224 are connected together to form a mesh structure, and the broken line boundary band 210 respectively surrounds the multiple first connecting strips 222 and the multiple second connecting strips 224. Connecting strip 222 and multiple second connecting strips 224 are provided, and each grid unit of the grid structure is a square grid unit. A zigzag boundary band 210 is provided around the periphery of the grid covering body 220. Both ends of each first connecting strip 222 and both ends of each second connecting strip 224 are connected to the zigzag boundary band 210. In use, the thermoplastic grid covering 200 can be softened by heating with hot water and then attached to the upper limb. The auxiliary wrapping tape 100 is then tied to the thermoplastic grid covering 200 when it is wrapped around the upper limb to achieve fixation. Because each grid unit of the grid structure is a square grid unit, the thermoplastic grid covering 200 can not only be stretched vertically (e.g., after being softened by heating), but also... Figure 2 (as shown in the S direction), left and right stretching (such as...) Figure 2 (As shown in the Y direction), and it can make the solid edges of each grid unit of the thermoplastic mesh covering 200 more uniformly stressed, so that the deformation of each part of the thermoplastic mesh covering 200 is more consistent when stretched according to actual needs, preventing the phenomenon of local stress concentration, avoiding uneven tension that leads to thinning of the product thickness, product breakage and other phenomena affecting fixation failure, and eliminating the need for cutting, thus making the thermoplastic mesh covering have better applicability and ease of operation; the above-mentioned thermoplastic mesh covering has fewer parts, greatly reducing the connection between parts that are prone to connection failure problems, and has better structural reliability.

[0050] In this embodiment, the thermoplastic mesh covering 200 is an integral structural component, that is, the thermoplastic mesh covering 200 is a single component structure. Compared with the traditional thermoplastic mesh covering 200, while meeting better applicability, there is no need to install adjustable fixing parts on the thermoplastic mesh covering 200, which simplifies the structure of the thermoplastic mesh covering 200.

[0051] like Figure 3As shown, the universal upper limb immobilizer 10 described above can be applied to the user's, i.e., the patient's, left or right upper limb. For example, the front of the universal upper limb immobilizer 10 is applicable to the user's left upper limb, and the back of the universal upper limb immobilizer 10 is applicable to the user's right upper limb, which improves the applicability and ease of use of the universal upper limb immobilizer 10.

[0052] To better understand how square mesh units can avoid uneven tensile stress that could lead to product thinning or breakage during stress application, a stress analysis of the deformation of the thermoplastic mesh covering 200 is further conducted. During shaping, the thermoplastic mesh covering 200 is subjected to tensile force, resulting in two types of deformation: structural deformation and material deformation. Under tensile force, structural deformation occurs first, followed by material deformation. Taking the lateral stretching of the product as an example... Figure 4 Point A is subjected to tensile force. After the force is applied, the structure at point A deforms as shown. Figure 5 As shown. The structural length dimension L1 of the product at point A is 2* *a becomes 4a. Similarly, when the product is stretched vertically, the deformation at each point is the same as or similar to that at point A, ensuring consistent stress on all sides of the product. Thus, after structural deformation, the product undergoes material deformation, significantly increasing the deformation without affecting the product's dimensions, thereby reducing product specifications and meeting the installation needs of different patients. The aforementioned thermoplastic mesh covering 200, based on the plasticity and toughness of thermoplastic materials during thermoforming, ensures consistent stress on all sides of the product when stretched vertically or horizontally, achieving consistent deformation across the structure, preventing localized stress concentration, and avoiding uneven tension leading to thinner product thickness, product breakage, and other fixation failures. Furthermore, as... Figure 2 As shown, after the thermoplastic mesh covering 200 is shaped, it is necessary to ensure that there is a certain gap between the two boundaries after the thermoplastic mesh covering 200 wraps the upper limb. In this way, after the thermoplastic mesh covering 200 is realized, interference between the two boundaries is avoided after installation.

[0053] like Figure 1 and Figure 2 As shown, in one embodiment, the wall of the socket relief hole is arc-shaped between two adjacent first connecting strips 222 to avoid scratching the hand during use and to better fit the user's thumb. Furthermore, the wall of the socket relief hole is arc-shaped between two adjacent second connecting strips 224, further enhancing the fit of the socket relief hole to the user's thumb.

[0054] like Figure 1 and Figure 2As shown, in one embodiment, the thermoplastic mesh covering 200 is an integral injection-molded structure, which reliably connects the folded boundary strip 210, multiple first connecting strips 222 and multiple second connecting strips 224, while making the overall structure of the thermoplastic mesh covering 200 more compact, and the thermoplastic mesh covering 200 has good thermoplasticity during use.

[0055] like Figure 1 and Figure 2 As shown, in one embodiment, a portion of the connection points between the first connecting strip 222 and the second connecting strip 224 are located on the zigzag boundary band 210, that is, the zigzag boundary band 210 passes through a portion of the connection points between the first connecting strip 222 and the second connecting strip 224. In other words, the zigzag boundary band 210 passes through a portion of the connection points between the first connecting strip 222 and the second connecting strip 224 at the edge of the mesh covering body 220, so that the thermoplastic mesh covering 200 has good structural strength.

[0056] like Figure 1 and Figure 2 As shown, in one embodiment, the portion where the first connecting strip 222 connects to the second connecting strip 224 is rounded, so that the first connecting strip 222 and the second connecting strip 224 are firmly connected, while reducing the stress on the connection between the first connecting strip 222 and the second connecting strip 224.

[0057] like Figure 1 and Figure 2 As shown, further, a portion of the zigzag boundary strip 210 is parallel to the first connecting strip 222, giving the zigzag boundary strip 210 better thermoplastic deformation properties and preventing scratches to people or clothing during long-term wear. Even further, in one embodiment, a portion of the zigzag boundary strip 210 is parallel to the second connecting strip 224, giving the zigzag boundary strip 210 better thermoplastic deformation properties and preventing scratches to people or clothing during long-term wear.

[0058] like Figure 1 and Figure 2 As shown, in one embodiment, the edge of the zigzag boundary strip 210 is bent, and a portion of the zigzag boundary strip 210 is parallel to the first connecting strip 222, while a portion of the zigzag boundary strip 210 is parallel to the second connecting strip 224. This gives the zigzag boundary strip 210 better thermoplastic deformation properties, thereby giving the entire thermoplastic mesh covering 200 better thermoplastic deformation properties. That is, the entire thermoplastic mesh covering 200 has good deformation properties in both the vertical and horizontal directions, so that the product meets the needs of different patients wearing it on the same part of their body.

[0059] like Figure 1 and Figure 2 As shown, in one embodiment, the auxiliary wrapping tape 100 is a bandage or Velcro, giving it minimal elasticity to ensure better fixation to the thermoplastic mesh covering 200. In this embodiment, the auxiliary wrapping tape 100 is a bandage.

[0060] like Figure 2 As shown, this application also provides a design method for a thermoplastic mesh covering 200, used to design the thermoplastic mesh covering 200 described in any of the above embodiments. See also... Figure 6 Furthermore, the design method includes some or all of the following steps:

[0061] S101 collects data on the forearms of multiple different populations, obtaining multiple forearm data.

[0062] In this embodiment, the steps for collecting forearm data from multiple different groups are as follows: data is collected from the forearms of multiple groups of different ages, heights, and weights to obtain multiple forearm data. Specifically, in the 12-55 age group, a total of m groups of different ages, heights, and weights are selected for forearm data collection. Figure 7 The image shows a schematic diagram of forearm data obtained from data acquisition in one of the forearms.

[0063] S102, each of the forearm data is edited to obtain a data model of each upper limb fixed part.

[0064] In this embodiment, data editing is performed on each of the forearm data to obtain a data model for each upper limb fixation site. Specifically, step S101 collects m forearm data, and performs data editing on each of the m forearm data to obtain data models for m upper limb fixation sites. Figure 8 The image shows the pair. Figure 7 The diagram shows a data model for editing forearm data.

[0065] S103, data extraction is performed on the data model of each upper limb fixation part along the central axis at a preset interval to obtain several interface perimeter lines that are equidistantly set for each upper limb fixation part.

[0066] In this embodiment, data extraction is performed on the data model of each upper limb fixation site along the central axis at preset intervals to obtain several interface perimeter lines equidistantly set for each upper limb fixation site. For example... Figure 9 The image shows the pair. Figure 8The diagram illustrates several interface perimeter lines obtained by extracting data from the model shown. The central axis is the line connecting the middle finger of the data model to a preset position near the elbow crease. The intersection of the vertical plane passing through the central axis with each interface perimeter line yields a first and a second dividing point, thus dividing each interface perimeter line into a radial and ulnar line. It can be understood that the vertical plane of the central axis divides the data model into two sides: the side closer to the user's body is the radial side, and the side farther from the user's body is the ulnar side. The intersection of the vertical plane of the central axis with each interface perimeter line divides each closed interface perimeter line into a radial and ulnar line. Specifically, each upper limb fixation point has n equidistant interface perimeter lines, with dimensions L1, L2, ..., Ln. In the data model of the first upper limb fixation site, the radial line (corresponding ulnar line) is defined as: L111 (L112), L121 (L122)...L1n1 (L1n2), and the dimensions of the interface perimeter of the data model of the first upper limb fixation site are: L11 (=L111+L112), L12 (=L121+L122)...L1n (=L1n1+L1n2); similarly, the radial line (corresponding ulnar line) of the data model of the second upper limb fixation site is defined as: L211 (L212), L221 (L222)...L2n1 (L2n2), and the dimensions of the interface perimeter of the data model of the second upper limb fixation site are: L21 (=L211+L212), L22 (=L112+L122)...L1n1 (L1 ...)...L1n1 (L1n2)...L1n1 (L1n2)...L1n1 (L1n2)...L1n1 (L1n2)...L1n1 (L1n2)...L1n1 L221+L222)……L2n(=L2n1+L2n2;……and so on, the perimeter of the interface of the data model of the m-th upper limb fixed part is defined as: L m 1 (=L) m 11+L m 12), L m 2 (=L) m 21+L m 22) ...L m n(=L) m n1+L m n2), where m and n are integers greater than or equal to 2. It should be noted that L11 (=L111+L112) means that the value of L11 is equal to the sum of L111 and L112; L12 (= L121+L122) means that the value of L11 is equal to the sum of L121 and L122; similarly, the other statements above are deduced by analogy.

[0067] S105, the radial and ulnar lines of the interface perimeter lines of each of the multiple upper limb fixation sites are summed and averaged to obtain several radial average lines and corresponding ulnar average lines of the upper limb fixation sites. The radial average line is the average of the corresponding radial lines of the interface perimeter lines at the same position in the data models of the multiple upper limb fixation sites, and the ulnar average line is the average of the corresponding ulnar lines of the interface perimeter lines at the same position in the data models of the multiple upper limb fixation sites.

[0068] In this embodiment, the radial and ulnar sides of the perimeter lines of each interface of the multiple upper limb fixation sites are summed and averaged to obtain several radial average lines and corresponding ulnar average lines of the upper limb fixation sites. Specifically, the number of radial average lines of the upper limb fixation sites is n, namely P11, P21...Pn1. Wherein, P11 = (L111 + L211 + ... + L... m 11) / m, P21=(L121+ L221+……+ L m 21) / m,…,Pn=(L1n1+L2n1+…+ L m The number of ulnar average lines at the fixed site of the upper limb is n, namely P12, P22...Pn2. Where, P12 = (L112 + L212 + ... + L...) / m. m 12) / m, P22=(L122+ L222+……+ L m 22) / m,…,Pn2=(L1n2+L2n2+…+ L m n2) / m.

[0069] S107, using the central axis as a reference line, the radial and ulnar average lines of each interface perimeter of the upper limb fixation part are spread out and distributed on both sides of the central axis, so that multiple interface perimeter lines are fitted on the same plane and are equidistantly set at the preset interval.

[0070] In this embodiment, the radial and ulnar average lines of each interface perimeter of the upper limb fixation part are spread out and distributed on both sides of the central axis, with the central axis as the reference line. This makes the multiple interface perimeter lines fit on the same plane and set at equal intervals with the preset spacing. That is, the multiple interface perimeter lines are on the same plane and set at equal intervals, and the distance between two adjacent interface perimeter lines is equal to the preset spacing.

[0071] S109, sequentially connect and fit the adjacent first or second boundary points of the multiple interface perimeter lines to obtain the perimeter fitting outline of the thermoplastic mesh covering 200.

[0072] In this embodiment, adjacent first or second boundary points of multiple interface perimeter lines are sequentially connected and fitted to obtain the perimeter fitting outline of the thermoplastic mesh covering 200. For example... Figure 10 The figure shows the perimeter fitting outline of the thermoplastic mesh-covered part after fitting.

[0073] S111, optimize the perimeter fitting outline of the thermoplastic mesh covering and fill it with a square mesh to obtain the semi-finished thermoplastic mesh covering.

[0074] like Figure 11 The diagram shows the optimization of the perimeter fitting outline of the thermoplastic mesh covering of the universal upper limb fixation device, and the filling of a square mesh. In this embodiment, the perimeter fitting outline of the thermoplastic mesh covering of the universal upper limb fixation device 10 is optimized and filled with a square mesh to obtain a semi-finished thermoplastic mesh covering.

[0075] S113, optimize the boundary of the thermoplastic mesh-coated semi-finished product to obtain the thermoplastic mesh-coated part.

[0076] In this embodiment, the boundary of the thermoplastic mesh covering 200 semi-finished product is optimized to obtain the thermoplastic mesh covering 200.

[0077] Compared with the prior art, the present invention has at least the following advantages:

[0078] 1. In the aforementioned thermoplastic mesh covering 200, multiple first connecting strips 222 are arranged parallel to each other and at equal intervals, and multiple second connecting strips 224 are arranged parallel to each other and at equal intervals. The distance between two adjacent first connecting strips 222 is equal to the distance between two adjacent second connecting strips 224. The extension direction of each first connecting strip 222 is perpendicular to the extension direction of each second connecting strip 224. Furthermore, since two adjacent second connecting strips 224 are connected by at least one first connecting strip 222 and two adjacent second connecting strips 224 are connected by at least one second connecting strip 224, the multiple first connecting strips 222 and the multiple second connecting strips 224 are connected together to form a mesh. The thermoplastic mesh covering 200 has a grid structure, in which the zigzag boundary band 210 is respectively arranged around a plurality of first connecting strips 222 and a plurality of second connecting strips 224, and each grid unit of the grid structure is a square grid unit. In addition, the zigzag boundary band 210 is arranged around the periphery of the main body 220 of the mesh covering, and both ends of each first connecting strip 222 and both ends of each second connecting strip 224 are connected to the zigzag boundary band 210. In use, the thermoplastic mesh covering 200 can be softened by heating with hot water and then attached to the upper limb. Then, the auxiliary wrapping tape 100 is tied to the thermoplastic mesh covering 200 when the thermoplastic mesh covering 200 is wrapped around the upper limb to achieve fixation.

[0079] 2. Because each grid unit of the mesh structure is a square grid unit, the thermoplastic mesh covering 200 can not only be stretched vertically and horizontally, especially after being heated and softened, but also the stress on the solid edges of each grid unit of the thermoplastic mesh covering 200 is more uniform. This ensures that the deformation of each part of the thermoplastic mesh covering 200 is more consistent when stretched according to actual needs, preventing local stress concentration and avoiding uneven tension that could lead to thinning of the product, product breakage, or other fixation failures. Furthermore, no cutting is required, thus giving the thermoplastic mesh covering better applicability and ease of operation. The thermoplastic mesh covering has fewer parts, greatly reducing the likelihood of connection failures between parts and resulting in better structural reliability.

[0080] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A thermoplastic mesh covering for covering the upper limb, characterized in that, The thermoplastic mesh covering includes a zigzag boundary band and a mesh covering body. The mesh covering body includes multiple first connecting strips and multiple second connecting strips. The multiple first connecting strips are parallel to each other and equally spaced, and the multiple second connecting strips are parallel to each other and equally spaced. The distance between two adjacent first connecting strips is equal to the distance between two adjacent second connecting strips. The extension direction of each first connecting strip is perpendicular to the extension direction of each second connecting strip. Two adjacent second connecting strips are connected by at least one first connecting strip, and two adjacent first connecting strips are connected by at least one second connecting strip, so that the multiple first connecting strips and multiple second connecting strips are connected together to form a mesh structure. The zigzag boundary band is respectively arranged around the multiple first connecting strips and multiple second connecting strips. Both ends of each first connecting strip and both ends of each second connecting strip are connected to the zigzag boundary band. The mesh covering body has a socket hole for fitting around the thumb of the upper limb when the thermoplastic mesh covering is applied to the upper limb. The design methods for thermoplastic mesh-clad parts include: Data was collected from the forearms of multiple different populations to obtain multiple forearm data; Each forearm data is edited to obtain a data model for each upper limb fixation point; Data extraction is performed on the data model of each upper limb fixation site along the central axis at preset intervals to obtain several interface perimeter lines equidistantly set for each upper limb fixation site; wherein, the central axis is the line connecting the middle finger of the data model to a preset position near the elbow crease, and the intersection of the vertical plane passing through the central axis with each interface perimeter line is used to obtain the first dividing point and the second dividing point, and each interface perimeter line is divided into the radial line and the ulnar line; For each of the interface perimeter lines of the multiple upper limb fixation sites, the radial side line and the corresponding ulnar side line are summed and averaged to obtain several radial side average lines and corresponding ulnar side average lines of the upper limb fixation sites; wherein, the radial side average line is the average value of the corresponding radial side lines of the interface perimeter lines at the same position of the data model of the multiple upper limb fixation sites, and the ulnar side average line is the average value of the corresponding ulnar side lines of the interface perimeter lines at the same position of the data model of the multiple upper limb fixation sites. Using the central axis as a reference line, the radial and ulnar average lines of each interface perimeter of the upper limb fixation part are spread out and distributed on both sides of the central axis, so that multiple interface perimeter lines are fitted on the same plane and are equidistantly set at the preset interval. By sequentially connecting and fitting the first or second boundary points adjacent to the perimeter lines of multiple interfaces, the perimeter fitting outline of the thermoplastic mesh covering is obtained. The perimeter fitting outline of the thermoplastic mesh-covered part is optimized and filled with a square mesh to obtain a semi-finished product of the thermoplastic mesh-covered part. The boundaries of the thermoplastic mesh-coated semi-finished product are optimized to obtain the thermoplastic mesh-coated part.

2. The thermoplastic mesh covering according to claim 1, characterized in that, The wall of the socket clearance hole is arc-shaped when connecting two adjacent first connecting strips.

3. The thermoplastic mesh covering according to claim 2, characterized in that, The wall of the socket clearance hole is arc-shaped when connecting two adjacent second connecting strips.

4. The thermoplastic mesh covering according to claim 1, characterized in that, The thermoplastic mesh covering is an integral injection-molded structure.

5. The thermoplastic mesh covering according to claim 1, characterized in that, Some of the connection points between the first connecting strip and the second connecting strip are located on the polygonal boundary band.

6. The thermoplastic mesh covering according to claim 1, characterized in that, The part where the first connecting strip connects to the second connecting strip has a rounded corner transition.

7. The thermoplastic mesh covering according to claim 1, characterized in that, A portion of the broken-line boundary band is parallel to the first connecting strip.

8. The thermoplastic mesh covering according to claim 1, characterized in that, A portion of the broken-line boundary band is parallel to the second connecting strip.

9. A universal upper limb immobilizer, characterized in that, The invention includes an auxiliary wrapping tape and a thermoplastic mesh covering as described in any one of claims 1 to 8; the auxiliary wrapping tape is used to bind the thermoplastic mesh covering to the upper limb when the thermoplastic mesh covering is wrapped around the upper limb.

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