Segmented curvature symmetric glove arm structure of glove box

Abstract

The invention discloses a segmented curvature symmetric glove arm structure of a glove box, which is used for a rubber glove mould and comprises a mould body, an arm part arranged on the mould body and a joint line extending along the outline of the arm, the arm part sequentially comprises a wrist joint section, a forearm middle section, an elbow hub section, a big arm middle section and an upper arm near-end section in the axis direction, all the sections form mutually orthogonal transverse line segments on a main projection plane and a side projection plane, and the transverse line segment of the main projection plane and the transverse line segment of the side projection plane at the same longitudinal position jointly define an elliptical section; the joint lines are continuously arranged along all the sections, and different curvature radiuses are arranged from the wrist joint section to the forearm middle section, from the forearm middle section to the elbow hub section, from the elbow hub section to the big arm middle section and from the big arm middle section to the upper arm near end section respectively, so that curvature changing in sections is formed in the arm bending and stretching direction; the short axis of the oval section serves as a symmetric line, and the left half die and the right half die of the die body are arranged in a mirror image mode relative to the symmetric line.

Description

Technical Field

[0001] This invention relates to the field of glove mold design and manufacturing, specifically to a segmented curvature symmetrical glove box glove arm structure. Background Technology

[0002] In glove applications within glove boxes, insufficient wearing comfort manifests in several ways: when gloves are too large, arm flexion and extension movements easily cause material buildup and wrinkles, restricting flexibility; simultaneously, the mismatch between the glove's shape and ergonomic curves leads to increased dynamic stress concentration, exacerbating localized pressure friction and hindering subcutaneous blood circulation, increasing the risk of pressure sores with prolonged use. Regarding manufacturing defects, while glove molds made using parting surfaces are inexpensive, insufficient matching of curvature on both sides (especially in the wrist area) results in unbalanced stress distribution during molding, causing core misalignment, product eccentricity, and uneven thickness distribution, ultimately leading to uneven glove thickness. Current technology has not yet achieved an effective combination of ergonomic adaptation and arm shape symmetry optimization to disperse molding stress, hindering the synergistic improvement of protective performance and wearing comfort.

[0003] Chinese patent document CN208434771U discloses a comfortable glove. The glove's overall design is based on ergonomic principles, with structural designs on the fingers, palm, and back of the hand to facilitate hand movement, resulting in comfortable wear. Chinese patent document CN213227221U discloses a hollow glove mold for easy on and off. Existing patents primarily focus on wearing and use comfort, without considering the comfort of the glove's arm or the impact of eccentricity during production on the glove's protective performance. Chinese patent document CN102145522A uses a parting surface to create a steel mold for molding rubber gloves. While simple in structure and low in cost, it does not consider the impact of arm shape on the thickness consistency of the molded rubber glove product.

[0004] While existing hand optimization methods have improved wearing comfort in the palm and finger areas, their improvements are still limited to hand size adjustment and have not extended to the ergonomic adaptation of arm shape and the optimization of bilateral curvature symmetry, which restricts the freedom of movement of workers in complex work scenarios. Although the existing mold structure is low in cost, it ignores the impact of arm shape on thickness consistency, and the problem of local shielding effectiveness attenuation caused by uneven distribution of protective layer thickness remains unsolved. Summary of the Invention

[0005] To achieve the above and other related objectives, the present invention discloses a segmented curvature symmetrical glove box glove arm structure for rubber glove molds, including a mold body and an arm portion arranged on the mold body and a mold parting line extending along the arm contour. The arm portion includes, in sequence along the axial direction, a wrist joint segment, a forearm mid-section segment, an elbow joint segment, an upper arm mid-section segment, and an upper arm proximal segment. Each segment forms mutually orthogonal transverse line segments on the main projection plane and the side projection plane. The transverse line segments on the main projection plane and the transverse line segments on the side projection plane at the same longitudinal position jointly define an elliptical cross section. The mold line is continuously arranged along each segment, and different radii of curvature are set in the wrist joint segment to the middle forearm segment, the middle forearm segment to the elbow joint segment, the elbow joint segment to the middle upper arm segment, and the middle upper arm segment to the proximal upper arm segment, so as to form a segmented curvature in the flexion and extension direction of the arm. The minor axis of the elliptical cross section serves as the line of symmetry. The left and right halves of the mold body are arranged in mirror image with respect to this line of symmetry. The coincidence deviation of the center point of each cross section is no greater than ±0.1mm. The angle between the direction of the minor axis of each elliptical cross section and the axis of the arm is no greater than ±3°. Furthermore, the deviation of the curvature center point of each segment along the longitudinal distribution of the arm axis is no greater than ±0.05mm.

[0006] Preferably, the perimeter of each elliptical cross section is designed based on the actual perimeter of the arm of the worker wearing two layers of protective gloves in an actual operating scenario, including the actual perimeter of the wrist joint, the middle of the forearm, the elbow joint, the middle of the upper arm, and the proximal end of the upper arm, so that the molded glove fits the wearer's arm in the above-mentioned parts.

[0007] Preferably, the total longitudinal length of the arm portion along the axial direction is 608~648mm, and it is divided into an upper half and a lower half from the wrist joint end to the proximal end of the upper arm. The length of the upper half is 212~232mm, and the length of the lower half is 396~416mm.

[0008] Preferably, the lateral dimensions of the wrist joint segment, the mid-forearm segment, the elbow joint segment, the mid-upper arm segment, and the proximal upper arm segment on the main projection plane are 131~141mm, 111~121mm, 130~140mm, 194~204mm, and 230~240mm, respectively, and the lateral dimensions on the side projection plane are 32~38mm, 48~54mm, 72~78mm, 91~97mm, and 98~104mm, respectively.

[0009] Preferably, the ratios of the lateral dimensions of the wrist joint segment, the mid-forearm segment, the elbow joint segment, the mid-upper arm segment, and the proximal upper arm segment in the main projection plane to the lateral dimensions in the side projection plane are 3.4:1~4.4:1, 2.0:1~2.6:1, 1.6:1~2.0:1, 2.0:1~2.3:1, and 2.2:1~2.5:1, respectively.

[0010] Preferably, the circumferences of the elliptical cross sections of the wrist joint segment, the mid-forearm segment, the elbow joint segment, the mid-upper arm segment, and the proximal upper arm segment are 305.38~318.53mm, 283.65~296.80mm, 349.04~362.19mm, 498.73~511.88mm, and 578.73~591.88mm, respectively.

[0011] Preferably, the parting line curvature radius of the segment from the wrist joint to the middle forearm is 450~750mm, the parting line curvature radius of the segment from the middle forearm to the elbow joint is 500~2600mm, the parting line curvature radius of the segment from the elbow joint to the middle upper arm is 2500~10000mm, and the parting line curvature radius of the segment from the middle upper arm to the proximal upper arm is 900~4000mm.

[0012] Preferably, the maximum deviation of the wall thickness at key locations in the arm segment of the rubber glove made using the arm structure and molding process is no more than ±0.15mm, thereby improving the uniformity of the protective layer thickness.

[0013] By adopting the above technical solution, and through the segmented curvature radius gradient design of the arm, the shape changes of the human arm flexion and extension movements are precisely adapted. The longitudinal curvature distribution of the parting line, combined with the perimeter matching of the five-layer elliptical cross-section, makes the molded part conform to the ergonomic curve, reducing local pressure friction during movement. At the same time, the symmetrical design avoids the thickness deviation of the glove caused by molding eccentricity, ensuring the uniformity of glove thickness and the reliability of protection under complex and high-risk working conditions. Compared with the traditional parting surface reference groove relying on mechanical constraints, this invention effectively avoids the problem of uneven material distribution during molding caused by parting surface processing errors through the strict matching of the five-segment dimensional tolerance control of the main projection surface and the high-precision contour of the side projection surface. Based on the geometric constraints of the orthogonal symmetrical layout of the double projection surface, the stress distribution of the cavity is naturally balanced, and the molding eccentricity stress can be offset without the need for additional compensation mechanisms, significantly reducing the risk of local stress concentration, ensuring the uniformity of product thickness, and thus improving the uniformity of product thickness. Attached Figure Description

[0014] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. The drawings are provided for a better understanding of the invention and are not intended to limit the scope of this disclosure. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein: Figure 1 This is a front view of the glove arm according to an embodiment of the present invention; Figure 2 This is a side view of the glove arm according to an embodiment of the present invention.

[0015] Figure reference numerals: 101. Lateral dimension of the wrist joint segment on the main projection plane; 102. Lateral dimension of the mid-forearm segment on the main projection plane; 103. Lateral dimension of the elbow joint segment on the main projection plane; 104. Lateral dimension of the mid-upper arm segment on the main projection plane; 105. Lateral dimension of the proximal upper arm segment on the main projection plane; 106. Radius of curvature of the parting line from the wrist joint segment to the mid-forearm segment; 107. Curvature of the parting line from the mid-forearm segment to the elbow joint segment. Radius; 108. Radius of curvature of the parting line from the elbow joint to the mid-upper arm; 109. Radius of curvature of the parting line from the mid-upper arm to the proximal upper arm; 111. Lateral dimension of the wrist joint in the side projection plane; 110. Lateral dimension of the mid-forearm in the side projection plane; 112. Lateral dimension of the elbow joint in the side projection plane; 113. Lateral dimension of the mid-upper arm in the side projection plane; 114. Lateral dimension of the proximal upper arm in the side projection plane. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Reference Figure 1 This invention provides a segmented curvature symmetrical glove box glove arm structure for rubber glove molds, including a mold body and an arm portion arranged on the mold body and a mold parting line extending along the arm contour. The arm portion includes, in sequence along the axial direction, a wrist joint segment, a forearm mid-section segment, an elbow joint segment, an upper arm mid-section segment and an upper arm proximal segment. Each segment forms mutually orthogonal transverse line segments on the main projection plane and the side projection plane. The transverse line segments on the main projection plane and the transverse line segments on the side projection plane at the same longitudinal position jointly define an elliptical cross section. The mold line is continuously arranged along each segment, and different radii of curvature are set in the wrist joint segment to the middle forearm segment, the middle forearm segment to the elbow joint segment, the elbow joint segment to the middle upper arm segment, and the middle upper arm segment to the proximal upper arm segment, so as to form a segmented curvature in the flexion and extension direction of the arm. The minor axis of the elliptical cross section serves as the line of symmetry. The left and right halves of the mold body are arranged in mirror image with respect to this line of symmetry. The coincidence deviation of the center point of each cross section is no greater than ±0.1mm. The angle between the direction of the minor axis of each elliptical cross section and the axis of the arm is no greater than ±3°. Furthermore, the deviation of the curvature center point of each segment along the longitudinal distribution of the arm axis is no greater than ±0.05mm.

[0018] Preferably, the perimeter of each elliptical cross section is designed based on the actual perimeter of the arm of the worker wearing two layers of protective gloves in an actual operating scenario, including the actual perimeter of the wrist joint, the middle of the forearm, the elbow joint, the middle of the upper arm, and the proximal end of the upper arm, so that the molded glove fits the wearer's arm in the above-mentioned parts.

[0019] Preferably, the total longitudinal length of the arm portion along the axial direction is 608~648mm, and it is divided into an upper half and a lower half from the wrist joint end to the proximal end of the upper arm. The length of the upper half is 212~232mm, and the length of the lower half is 396~416mm.

[0020] Preferred, refer to Figure 1 and Figure 2 The lateral dimensions 101 of the wrist joint segment, 102 of the mid-forearm segment, 103 of the elbow joint segment, 104 of the mid-upper arm segment, and 105 of the proximal upper arm segment on the main projection plane are 131~141mm, 111~121mm, 130~140mm, 194~204mm, and 230~240mm, respectively. The lateral dimensions 110 of the wrist joint segment, 111 of the mid-forearm segment, 112 of the elbow joint segment, 113 of the mid-upper arm segment, and 114 of the proximal upper arm segment on the side projection plane are 32~38mm, 48~54mm, 72~78mm, 91~97mm, and 98~104mm, respectively.

[0021] Preferably, the ratios of the lateral dimensions of the wrist joint segment, the mid-forearm segment, the elbow joint segment, the mid-upper arm segment, and the proximal upper arm segment in the main projection plane to the lateral dimensions in the side projection plane are 3.4:1~4.4:1, 2.0:1~2.6:1, 1.6:1~2.0:1, 2.0:1~2.3:1, and 2.2:1~2.5:1, respectively.

[0022] Preferably, the circumferences of the elliptical cross sections of the wrist joint segment, the mid-forearm segment, the elbow joint segment, the mid-upper arm segment, and the proximal upper arm segment are 305.38~318.53mm, 283.65~296.80mm, 349.04~362.19mm, 498.73~511.88mm, and 578.73~591.88mm, respectively.

[0023] Preferred, refer to Figure 1The parting line curvature radius 106 from the wrist joint segment to the mid-forearm segment is 450~750mm, the parting line curvature radius 107 from the mid-forearm segment to the elbow joint segment is 500~2600mm, the parting line curvature radius 108 from the elbow joint segment to the mid-upper arm segment is 2500~10000mm, and the parting line curvature radius 109 from the mid-upper arm segment to the proximal upper arm segment is 900~4000mm.

[0024] Preferably, the maximum deviation of the wall thickness at key locations in the arm segment of the rubber glove made using the arm structure and molding process is no more than ±0.15mm, thereby improving the uniformity of the protective layer thickness.

[0025] Next, the present invention will provide a detailed description of the technical solution by providing embodiments.

[0026] Example 1 Based directly on the dimensions of the gloves in actual application scenarios where workers wear two layers of protective gloves, the glove arm dimensions were designed as shown in Table 1. The glove arms designed according to these dimensions ensure smooth insertion of the hand and arm into the glove. They also conform to the human body's curves, with a curvature radius of 450mm from the wrist joint to the mid-forearm, 500mm from the mid-forearm to the elbow joint, 2500mm from the elbow joint to the mid-upper arm, and 900mm from the mid-upper arm to the proximal upper arm, ensuring operational flexibility.

[0027] Table 1: Dimensions of different parts of the arm

[0028] With the minor axis of the ellipse as the line of absolute symmetry, the center point of the elliptical cross-section of the left and right halves of the mold coincides with a deviation of ≤±0.1mm. The layered line segments of the main projection plane and the side projection plane are distributed in a mirror image on both sides of the line of symmetry. The angle between the minor axis of each layer's elliptical cross-section and the arm axis is ≤±3°, ensuring that the morphological symmetry naturally offsets the eccentric stress of the molding.

[0029] Results after implementation: Solving uneven thickness: The maximum deviation of wall thickness at key locations on the arm section is ≤ ±0.15mm, and the uniformity of protection meets the standards.

[0030] Improved comfort: Arm flexion and extension flexibility is increased by about 30%, and there is no significant pressure even after wearing for a long time (>4 hours).

[0031] Extended mold life: After 1000 vulcanization cycles, the mold showed no significant deformation, and its lifespan is expected to increase by 20%.

[0032] Example 2 Based directly on the dimensions of the gloves in actual application scenarios where workers wear two layers of protective gloves, the glove arm dimensions were designed as shown in Table 2. The glove arms designed according to these dimensions ensure smooth insertion of the hand and arm into the glove. They also conform to the human body's curves, with a curvature radius of 585mm from the wrist joint to the mid-forearm, 1450mm from the mid-forearm to the elbow joint, 7000mm from the elbow joint to the mid-upper arm, and 2300mm from the mid-upper arm to the proximal upper arm, ensuring operational flexibility.

[0033] Table 2: Dimensions of different parts of the arm

[0034] With the minor axis of the ellipse as the line of absolute symmetry, the center point of the elliptical cross-section of the left and right halves of the mold coincides with a deviation of ≤±0.1mm. The layered line segments of the main projection plane and the side projection plane are distributed in a mirror image on both sides of the line of symmetry. The angle between the minor axis of each layer's elliptical cross-section and the arm axis is ≤±3°, ensuring that the morphological symmetry naturally offsets the eccentric stress of the molding.

[0035] Results after implementation: Solving uneven thickness: The maximum deviation of wall thickness is ≤ ±0.12mm, and the uniformity of the protective layer thickness meets the standard.

[0036] Improved comfort: The fit of the elbow joint's range of motion is optimized, eliminating any pulling sensation during dynamic operation, resulting in a 35% increase in comfort score.

[0037] Extend mold life: Peak stress in key parts is reduced by about 15%, and dimensions stabilize after 1,500 cycles.

[0038] Example 3 The glove arm dimensions were designed based on the actual dimensions of the gloves worn by workers in two layers of protective gloves in real-world applications, as shown in Table 3. These dimensions ensure that the hand and arm can easily fit into the glove. The glove arms also conform to the human body's curves: a radius of curvature of 740mm from the wrist joint to the mid-forearm, 2500mm from the mid-forearm to the elbow joint, 9000mm from the elbow joint to the mid-upper arm, and 3800mm from the mid-upper arm to the proximal upper arm, ensuring operational flexibility.

[0039] Table 3: Dimensions of Various Parts of the Arm

[0040] With the minor axis of the ellipse as the line of absolute symmetry, the center point of the elliptical cross-section of the left and right halves of the mold coincides with a deviation of ≤±0.1mm. The layered line segments of the main projection plane and the side projection plane are distributed in a mirror image on both sides of the line of symmetry. The angle between the minor axis of each layer's elliptical cross-section and the arm axis is ≤±3°, ensuring that the morphological symmetry naturally offsets the eccentric stress of the molding.

[0041] Results after implementation: Solving uneven thickness: The maximum deviation of the arm segment wall thickness is ≤ ±0.10mm, and the uniformity of the transition area from the elbow pivot to the upper arm is excellent.

[0042] Improved comfort: The pressure distribution on the arms is more even, and the feeling of restriction in shoulder movement is significantly reduced.

[0043] Extend mold life: The wear rate of key components is reduced, and the precision is good after 2000 cycles.

[0044] Example 4 The glove arm dimensions were designed based on the actual dimensions of the gloves worn by workers wearing two layers of protective gloves in real-world applications, as shown in Table 4. These dimensions ensure that the hand and arm can easily fit into the glove. The glove arms also conform to the human body's curves: a radius of curvature of 750mm from the wrist joint to the mid-forearm, 2600mm from the mid-forearm to the elbow joint, 10000mm from the elbow joint to the mid-upper arm, and 4000mm from the mid-upper arm to the proximal upper arm, ensuring operational flexibility.

[0045] Table 4: Dimensions of Various Parts of the Arm

[0046] With the minor axis of the ellipse as the line of absolute symmetry, the center point of the elliptical cross-section of the left and right halves of the mold coincides with a deviation of ≤±0.1mm. The layered line segments of the main projection plane and the side projection plane are distributed in a mirror image on both sides of the line of symmetry. The angle between the minor axis of each layer's elliptical cross-section and the arm axis is ≤±3°, ensuring that the morphological symmetry naturally offsets the eccentric stress of the molding.

[0047] Results after implementation: Solving uneven thickness: The wall thickness remains uniform within tolerance (e.g., ±0.2mm) even for large dimensions, and the minimum thickness meets the standard.

[0048] Enhanced comfort: Ample interior space reduces friction, making it suitable for long / high-intensity work or scenarios with thick linings.

[0049] Extended mold life: Large-size molds have balanced forces during mold closing, are in good overall condition, and have a stable expected lifespan. It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the meaning consistent with their meaning in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined.

[0050] For the sake of simplicity, the method embodiments are described as a series of actions. However, those skilled in the art should understand that the embodiments of the present invention are not limited to the described order of actions, because according to the embodiments of the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions involved are not necessarily essential to the embodiments of the present invention.

[0051] As can be seen from the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in various embodiments or some parts of the embodiments of this application.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A segmented curvature symmetry glove box glove arm structure for a rubber glove mold, comprising a mold body and an arm portion arranged on the mold body and a mold closing line extending along the arm contour, characterized in that: the arm portion comprises, in sequence along the axis direction, a wrist joint segment, a lower arm middle segment, an elbow pivot segment, an upper arm middle segment, and a proximal upper arm segment, each segment forms a mutually orthogonal transverse line segment in a main projection plane and a side projection plane, and the main projection plane transverse line segment and the side projection plane transverse line segment at the same longitudinal position together define an elliptical cross section; the mold closing line is arranged continuously along the segments, and different radii of curvature are provided in the wrist joint segment to the lower arm middle segment, the lower arm middle segment to the elbow pivot segment, the elbow pivot segment to the upper arm middle segment, and the upper arm middle segment to the proximal upper arm segment, so as to form a segmented change in curvature in the arm flexion direction; the short axis of the elliptical cross section serves as a symmetry line, and the left and right halves of the mold body are mirror image arranged relative to the symmetry line, the coincidence deviation of the center points of each cross section is not greater than ±0.1mm, the angle between the short axis direction of each elliptical cross section and the arm axis is not greater than ±3°, and the longitudinal distribution deviation of the corresponding curvature center points of each segment along the arm axis is not greater than ±0.05mm; the circumference of each elliptical cross section is designed based on the actual measured cross section circumference of the arm of a worker wearing two layers of protective gloves in an actual operation scene, including the measured circumferences of the wrist joint, the lower arm middle segment, the elbow pivot, the upper arm middle segment, and the proximal upper arm, so that the formed glove fits the wearer's arm at the above-mentioned positions; the longitudinal total length of the arm portion along the axis direction is 608-648mm, and is divided into an upper half segment and a lower half segment from the wrist joint end to the proximal upper arm, the length of the upper half segment is 212-232mm, and the length of the lower half segment is 396-416mm; the transverse dimensions of the wrist joint segment, the lower arm middle segment, the elbow pivot segment, the upper arm middle segment, and the proximal upper arm segment in the main projection plane are 131-141mm, 111-121mm, 130-140mm, 194-204mm, and 230-240mm respectively, and the transverse dimensions in the side projection plane are 32-38mm, 48-54mm, 72-78mm, 91-97mm, and 98-104mm respectively; the ratio of the transverse dimension in the main projection plane to the transverse dimension in the side projection plane of the wrist joint segment, the lower arm middle segment, the elbow pivot segment, the upper arm middle segment, and the proximal upper arm segment is 3.4:1-4.4:1, 2.0:1-2.6:1, 1.6:1-2.0:1, 2.0:1-2.3:1, and 2.2:1-2.5:1 respectively; the elliptical cross section circumferences of the wrist joint segment, the lower arm middle segment, the elbow pivot segment, the upper arm middle segment, and the proximal upper arm segment are 305.38-318.53mm, 283.65-296.80mm, 349.04-362.19mm, 498.73-511.88mm, and 578.73-591.88mm respectively. ​ ​ ​ 2. A segmented curvature symmetrical glove box glove arm structure as claimed in claim 1, wherein, ​ 3. A segmented curvature symmetrical glove box glove arm structure as claimed in claim 1, wherein, ​ 4. A segmented curvature symmetrical glove box glove arm structure as claimed in claim 3, wherein, ​ 5. A segmented curvature symmetrical glove box glove arm structure as claimed in claim 4, wherein, ​ 6. A segmented curvature symmetrical glove box glove arm structure as claimed in claim 4, wherein, ​ 7. A segmented curvature symmetrical glove box glove arm structure as claimed in claim 1, wherein, The mold line curvature radius of the wrist segment to the middle segment of the forearm is 450-750 mm, the mold line curvature radius of the middle segment of the forearm to the elbow pivot segment is 500-2600 mm, the mold line curvature radius of the elbow pivot segment to the middle segment of the upper arm is 2500-10000 mm, and the mold line curvature radius of the middle segment of the upper arm to the proximal segment of the upper arm is 900-4000 mm.

8. A segmented curvature symmetrical glove box glove arm structure as claimed in claim 7, wherein, The rubber glove prepared by using the arm structure and the mold pressing process has a maximum wall thickness deviation of not more than ±0.15 mm at key positions of the arm segment, thereby improving the uniformity of the thickness of the protective layer.

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