A shirt with a hinged back cover

Abstract

This utility model discloses a shirt with a hinged back flap, including a front piece, a back piece, sleeve pieces, and a back flap structure. The back flap structure consists of an outer hinged layer and a replaceable inner insert. The lower edge of the outer hinged layer is connected to the back piece of the shirt via a connecting area, allowing the outer hinged layer to open and close along the connecting area. Traditional back flaps, due to their fixed sewing of the inner and outer layers, cannot be replaced with different fabrics and cannot adapt to climate differences. This solution modularizes the back flap's functional layers through a separate design of the outer hinged layer and the replaceable inner insert: improving seasonal adaptability and allowing adjustment according to climate, solving the problems of stuffiness in summer and insufficient warmth in winter. Furthermore, both the inner and outer layers of the back flap are detachable and replaceable, thus creating a back flap adaptable to different usage environments.

Description

Technical Field

[0001] This utility model relates to a shirt with a hinged back cover, belonging to the field of shirt technology. Background Technology

[0002] The back panel is an important structural component of the shirt's back panel, typically located below the shoulder blades, and features a horizontal, double-layered design. Its core functions include distributing stress on the shoulders and back, enhancing the overall crispness of the shirt, providing anchor points for back panel pleats or darts, optimizing ergonomic fit, and enhancing visual depth through double-layered fabric or stitching techniques.

[0003] Traditionally used in men's dress shirts, the back cover often uses a fixed double-layer cotton fabric to balance strength and concealment. In sports shirts or functional clothing, stretch fabric may be added to improve freedom of movement.

[0004] Traditional backstitching has poor seasonal adaptability, as the fixed fabric cannot be adjusted according to the climate, resulting in stuffiness in summer and insufficient warmth in winter; in addition, the inner and outer layers of traditional backstitching are fixedly sewn together, and the materials cannot be changed, making it difficult to balance breathability and warmth. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a shirt with a hinged back flap to solve the problems of the existing technology.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0007] A shirt with a hinged back flap includes a front panel, a back panel, sleeve panels, and a back flap structure, wherein the back flap structure consists of an outer hinge and a replaceable inner flap.

[0008] The lower edge of the outer flap is connected to the back piece of the shirt through a connecting area, allowing the outer flap to open and close along the connecting area;

[0009] The connecting area is reinforced by a bar stitching line, forming a positioning line that runs through the width of the rear composite section.

[0010] As a further improvement, the opening and closing end of the outer hinge is provided with a concealed fastening component, which includes a magnetic button or a micro zipper.

[0011] The fixing component is completely hidden inside the outer hinge and is flush with the outer fabric when closed.

[0012] As a further improvement, the replaceable inner insert is an independent functional module, which is connected to the rear plate through a slot-type structure.

[0013] The slot-type structure includes a flexible guide rail sewn onto the back piece and an elastic retaining strip on the edge of the inner insert. The inner insert is installed and fixed by the cooperation of the elastic retaining strip and the flexible guide rail.

[0014] As a further improvement, the inner layer insert is provided with a plurality of meshes. The inner layer insert includes a hydrophobic coating on the outer surface, a composite graphene heating film in the middle layer, and a thermosensitive phase change material layer in the innermost layer. The composite graphene heating film is connected to a power supply interface via a micro USB. The phase change temperature threshold of the thermosensitive phase change material layer is 25℃±3℃.

[0015] It also includes a control module and a power bank, wherein the control module is electrically connected to the power bank and the composite graphene heating film.

[0016] As a further improvement, the connecting area consists of a first Velcro sewn onto the back piece of the shirt and a second Velcro sewn onto the outer hinge. Through the cooperation of the first and second Velcro, the outer hinge is rotatably mounted onto the back piece of the shirt.

[0017] As a further improvement, the inner side of the outer hinge is provided with an airflow guiding groove, which includes multiple radial three-dimensional protrusions.

[0018] The protruding ridges are 0.3-0.5mm high and 2-3mm apart, forming an air convection channel.

[0019] As a further improvement, a temperature sensor is provided in the middle layer of the inner insert, and the temperature sensor is electrically connected to the control module.

[0020] As a further improvement, the slot-type fabric guide rail is embedded with an arc-shaped memory alloy wire.

[0021] The shape memory alloy wire expands linearly by 0.5-1.2 mm at a temperature ≥37℃, and the shape memory alloy wire abuts against the elastic clip.

[0022] Beneficial effects:

[0023] This invention addresses the limitation of traditional backsheet fabrics where the inner and outer layers are fixedly sewn together, preventing fabric replacement and adaptability to climate differences. This solution utilizes a separate design of the outer hinge and replaceable inner inserts to modularize the functional layers of the backsheet.

[0024] The outer hinge acts as a structural frame, and the lower edge opening and closing function is achieved through the connection area reinforced by bar stitching. This maintains the support strength of the traditional rear hinge while forming an adjustable physical interface.

[0025] The inner insert serves as a functional carrier and can be flexibly changed according to seasonal needs. For example, mesh fabric is used in summer to enhance breathability, cashmere or wool is used in winter to improve warmth, and elastic fiber fabric is selected for sports scenarios.

[0026] Completely breaking the limitations of traditional single-use shirts, this design allows the same shirt to dynamically adapt to ambient temperatures ranging from -10℃ to 35℃, and the changing process can be completed in just 10 seconds without the need for sewing tools.

[0027] Addressing the issue of back stuffiness during vigorous activity caused by traditional back flaps, this design utilizes a microclimate created by the hinges to achieve physical ventilation. When the outer flap is open, an airflow channel is formed between the inner panel and the inside of the shirt, automatically exchanging airflow with the outside air to dissipate heat in conjunction with the movement of the shoulder blades during body movement. The mesh fabric used for the inner panel has a porosity of 45%-60%, which is more than 3 times more breathable than traditional cotton fabrics. The winter insulation panel, together with the closed outer flap, forms a double-layer composite structure, achieving a gradient function of moisture absorption in the inner layer and heat retention in the outer layer.

[0028] Compared to existing technologies that improve fabric composition by changing elements such as adding moisture-wicking fibers or increasing structural pleats, this invention employs a creative combination of basic processes:

[0029] By positioning the barbed thread, the barbed thread process, which is traditionally used only for stitch reinforcement, is given a new function: as a stress dispersion zone for hinges. With a precision stitch spacing of 0.8mm, it ensures durability for 200,000 opening and closing cycles while keeping the thickness of the connection area within 1.2mm.

[0030] It can improve seasonal adaptability and adjust according to the climate, solving the problems of hot summer and insufficient warmth in winter. Furthermore, both the inner and outer layers of the back cover are detachable and replaceable, thus forming a back cover that can adapt to different usage environments. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the back structure of a shirt with a hinged back cover according to the present invention.

[0033] Figure 2 This is a schematic diagram of the front structure of a shirt with a hinged back flap, according to the present invention.

[0034] Figure 3 This is a schematic diagram of the disassembled structure of a hinged rear retractor according to the present invention.

[0035] Figure 4 yes Figure 1 Enlarged structural diagram at point A in the middle.

[0036] Figure 5 yes Figure 3 Enlarged structural diagram at point B.

[0037] Figure 6 yes Figure 3 Enlarged structural diagram at point C.

[0038] Figure 7 yes Figure 3 Enlarged structural diagram at point D.

[0039] Figure 8 yes Figure 3 An enlarged structural schematic diagram of another embodiment at point D.

[0040] Figure 9 yes Figure 3 Enlarged structural diagram at point E in the middle.

[0041] Figure 10 This is a module connection diagram of a shirt with a hinged back flap, according to the present invention.

[0042] 1. Front panel; 2. Back panel; 3. Sleeve panel; 4. Composite structure; 41. Outer hinge; 42. Inner insert; 43. Connecting area; 44. Positioning line; 45. Magnetic button; 46. Miniature zipper; 421. Flexible guide rail; 422. Elastic clip; 423. Curved memory alloy wire; 424. Mesh; 425. Hydrophobic coating; 426. Composite graphene heating film; 427. Thermosensitive phase change material layer; 428. Miniature USB power supply interface; 5. Control module; 6. Power bank; 7. Temperature sensor; 411. Airflow guide groove; 412. Raised ridge; 431. First Velcro; 432. Second Velcro. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0044] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified. Example

[0045] Reference Figure 1-3 As shown in Figure 5, a shirt with a hinged back flap includes a front piece 1, a back piece 2, a sleeve piece 3, and a back flap structure 4, wherein the back flap structure 4 is composed of an outer hinge 41 and a replaceable inner insert 42.

[0046] The lower edge of the outer flap 41 is connected to the back piece 2 of the shirt through the connecting area 43, so that the outer flap 41 can be opened and closed along the connecting area 43;

[0047] The connecting area 43 is reinforced by a bar stitching line to form a positioning line 44 that runs through the width of the rear composite section.

[0048] Traditional back panel fabric, due to its fixed seams between the inner and outer layers, cannot be replaced and is unsuitable for different climates. This solution modularizes the functional layers of the back panel by using a separate design of the outer hinge 41 and the replaceable inner insert 42.

[0049] The outer hinge 41 serves as a structural frame, and the lower edge opening and closing function is achieved through the connection area 43 reinforced by bar stitching. This maintains the support strength of the traditional back cover while forming an adjustable physical interface.

[0050] The inner insert 42 serves as a functional carrier and can be flexibly changed according to seasonal needs. For example, in summer, mesh 424 fabric is used to enhance breathability, cashmere or wool is used in winter to improve warmth, and elastic fiber fabric is selected for sports scenarios.

[0051] Completely breaking the limitations of traditional single-use shirts, this design allows the same shirt to dynamically adapt to ambient temperatures ranging from -10℃ to 35℃, and the changing process can be completed in just 10 seconds without the need for sewing tools.

[0052] To address the issue of stuffiness in the back of traditional back shirts during strenuous activity, a physical ventilation path is achieved through the microclimate circulation formed by the opening and closing of the hinges. When the outer hinge 41 is opened, an airflow channel is formed between the inner insert 42 and the inside of the shirt. In conjunction with the movement of the shoulder blades during human movement, it automatically exchanges with the external airflow to achieve heat dissipation.

[0053] The inner insert 42 uses a mesh 424 fabric with a porosity of 45%-60%, which improves breathability by more than 3 times compared to traditional cotton fabrics. The winter insulation insert, together with the outer hinge 41 which is closed, forms a double-layer composite structure to achieve a gradient function of moisture absorption in the inner layer and heat retention in the outer layer.

[0054] Compared to existing technologies that improve fabric composition by changing elements such as adding moisture-wicking fibers or increasing structural pleats, this invention employs a creative combination of basic elements:

[0055] By positioning the barbed thread, the barbed thread process, which is traditionally only used for stitch reinforcement, is given a new function: as a stress dispersion zone for hinges. With a precision stitch spacing of 0.8mm, it ensures durability for 200,000 opening and closing cycles while keeping the thickness of the connection area 43 within 1.2mm.

[0056] With the hidden inner insert 42, the size of the inner insert 42 is precisely matched to the interlayer space error of the outer hinge 41 and the back sheet 2 within ±0.3mm, ensuring that the appearance is completely consistent with the traditional back sheet and avoiding the visual abruptness caused by the modular design.

[0057] The standardized interface design of the inner insert 42 reserves space for future functional expansion and forms a detachable and replaceable feature.

[0058] As a further improvement, the opening and closing end of the outer flap 41 is provided with an invisible fixing component, which includes a magnetic button 45 or a micro zipper 46; the micro zipper 46 is sewn on the upper part of the outer flap 41 at the corresponding position of the back piece 2.

[0059] The fixing component is completely hidden inside the outer hinge 41 and is flush with the outer fabric when closed.

[0060] As a further improvement, the replaceable inner insert 42 is an independent functional module, and the inner insert 42 is connected to the rear piece 2 through a slot-type structure;

[0061] The slot-type structure includes a flexible guide rail 421 sewn onto the rear piece 2 and an elastic retaining strip 422 on the edge of the inner insert 42. The inner insert 42 is installed and fixed by the cooperation of the elastic retaining strip 422 and the flexible guide rail 421.

[0062] The slotted fabric guide rail is embedded with an arc-shaped memory alloy wire 423.

[0063] The shape memory alloy wire expands linearly by 0.5-1.2 mm at a temperature ≥37℃, and the shape memory alloy wire abuts against the elastic clip 422.

[0064] Traditional hinges are fixed, which can look out of place, especially in formal business settings. However, the embedded magnetic button 45 or miniature zipper 46 can control the fixing and opening of the outer hinge 41.

[0065] Completely hidden inside the outer hinge 41 by the fastening component, it is flush with the fabric when closed and not visible to the naked eye, preserving the clean lines of the back piece 2 of the shirt;

[0066] In one embodiment, the fixing component is a magnetic button 45, which can replace the zipper to fix the fabric. The magnetic attraction magnetic force is ≤0.5N to achieve lightweight fixing and avoid wrinkles when the zipper is opened or closed or the button seam pulls and deforms the fabric.

[0067] The magnetic buttons 45 are arranged in two sets, one set is sewn onto the outer hinge 41, and the other set is sewn onto the back piece.

[0068] Among them, the magnetic button 45 can be opened and closed quickly with one hand, saving 70% of the operation time compared with traditional buttons;

[0069] In another embodiment, the fixing component is a micro zipper 46 with a tooth pitch ≤1.5mm, employing a self-aligning guide rail design to avoid jamming, and the zipper head can be completely concealed within the fabric folds. The connection strength using the micro zipper 46 is higher than that of the magnetic button 45.

[0070] During vigorous activities such as swinging arms or bending over, the invisible fastening component uses multiple locking magnetic buttons 45 (≥3 sets) / micro zippers 46 with full toothed locking to ensure that the outer hinge 41 will not be accidentally opened, which is 200% stronger than traditional single-point stitching.

[0071] Traditional outer hinges 41 require sewing or fastening with the first and second Velcro straps 432 on the back piece 2. Most existing outer hinges 41 are not removable, or involve cumbersome disassembly and reassembly, such as the need to remove and resew the sewing thread. The slot-type structure achieves non-destructive quick-release and stable fixation through a combination of flexible materials and elastic mechanics.

[0072] The advantage is that it can be installed and removed quickly without tools. The inner insert 42 can be locked by sliding along the flexible guide rail 421 through the elastic clip 422, and the installation time is ≤5 seconds.

[0073] The flexible guide rail 421 has an elastic modulus ≤5MPa and is made of silicone-coated polyester fabric, which provides both guidance and support and avoids stress concentration on the back piece 2 of the shirt from the rigid guide rail.

[0074] The elastic clips, with a Shore hardness of 60-70A and a pre-compression deformation of 15%-20%, provide a basic clamping force of ≥2N / cm², ensuring stability in a static state.

[0075] During dynamic activities such as running and swinging arms, the movement of the scapula causes slight deformation of the back piece 2 fabric. The elastic clip 422 adjusts the clamping force adaptively through deformation to prevent the insert from loosening.

[0076] Body temperature or strenuous activity can cause displacement of the inner insert 42, such as the insert slipping off after sweating in summer or loosening due to scapular movement during exercise. Traditional methods rely on manual inspection and adjustment, while the temperature response characteristics of shape memory alloy wires can achieve dynamic adaptive fixation.

[0077] Self-locking triggered by body temperature:

[0078] The arc-shaped memory alloy wire 423, with a phase change temperature threshold of 37℃±0.5℃, is embedded inside the flexible guide rail 421. When the body temperature is conducted to the guide rail, the alloy wire expands linearly by 0.8mm due to heat, pushing the elastic clip 422 to move 0.3-0.5mm towards the insert.

[0079] This displacement increases the clamping force by 40%-60%, with a dynamic clamping force ≥3.5N / cm², effectively preventing the insert from falling off during movement.

[0080] In low-temperature environments, such as indoor temperatures of 20°C in winter, the shape memory alloy wire shrinks and resets, and the elastic clip 422 restores the basic clamping force, avoiding disassembly difficulties due to excessive clamping.

[0081] With a temperature response error of ≤±0.2℃, it ensures accurate triggering within the human body temperature range of 36.5-37.5℃.

[0082] No additional power supply or sensors are required; closed-loop regulation of body temperature, deformation, and clamping force is achieved solely through the physical properties of materials.

[0083] The fatigue life of shape memory alloy wire is ≥100,000 cycles, which corresponds to the normal service life of a shirt, avoiding frequent replacements. Example

[0084] Reference Figure 1-10As shown, this embodiment is a further optimization based on embodiment 1. The inner layer insert 42 is provided with a plurality of meshes 424. The inner layer insert 42 includes a hydrophobic coating 425 disposed on the outer surface, a composite graphene heating film 426 disposed in the middle layer, and a thermosensitive phase change material layer 427 disposed in the innermost layer. The composite graphene heating film 426 is connected to a power supply interface 428 via a micro USB. The phase change temperature threshold of the thermosensitive phase change material layer 427 is 25℃±3℃.

[0085] It also includes a control module 5 and a power bank 6, wherein the control module 5 is electrically connected to the power bank 6 and the composite graphene heating film 426.

[0086] As a further improvement, a temperature sensor 7 is provided in the middle layer of the inner insert 42, and the temperature sensor 7 is electrically connected to the control module 5.

[0087] Traditional back-coating inner layer inserts 42 only address the single issue of breathability or warmth retention. However, this solution utilizes a three-layer synergistic design combining a hydrophobic coating 425, a graphene heating film, and a thermosensitive phase change material, along with a control module 5, to achieve a leap from passive adaptation to active regulation. This completely solves the problem of insufficient dynamic climate adaptability, which prevents traditional fabrics from actively regulating temperature, resulting in stuffiness in summer and hypothermia in winter.

[0088] When insulation is needed in winter, this solution uses the control module 5 in conjunction with the graphene heating film to actively heat and slowly release the heat energy of the phase change material, which can cover environments from -10℃ to 35℃.

[0089] When sweat accumulates, causing sticky skin and bacterial growth, the combination of hydrophobic coating 425 and mesh structure 424 achieves integrated regulation of hydrophobicity, moisture wicking and evaporation.

[0090] Existing electrically heated clothing mostly uses resistance wire, which has high energy consumption and poor temperature control accuracy. By combining graphene heating film with phase change material, power consumption can be reduced by 30%, and thermal energy buffering can be achieved through phase change material.

[0091] Hydrophobic coating 425 serves as a moisture barrier on the outer surface. It employs a nano-grade fluorosilyl hydrophobic agent with a contact angle ≥150° and a thickness ≤2μm; the coating surface is covered with 0.1-0.3mm micropores, with a porosity of 40%-50%.

[0092] The hydrophobic coating 425 is splash-proof, and rainwater or sweat forms water droplets on the coating surface and rolls off, preventing liquid from penetrating into the inner layer; the moisture-wicking channels and micropores allow water vapor molecules with a diameter of 0.275nm to pass through, with a water vapor permeability ≥10,000g / m²·24h.

[0093] It also has self-cleaning properties, and the hydrophobic surface reduces dust adhesion. After 50 water washes, the hydrophobicity decreases by ≤5%.

[0094] The composite graphene heating film 426 features an active heating core in the middle layer. The material is a graphene-silver nanowire composite conductive layer with a resistance of 0.5-1.2Ω. The PET substrate thickness is 50μm, and the overall thickness is ≤0.2mm. The heating power density is adjustable from 30-60W / m².

[0095] In working condition:

[0096] Rapid heating: The surface temperature rises to 38°C within 30 seconds after power-on, with a surface temperature difference of ≤2°C / m².

[0097] Directional heat transfer: Graphene's high thermal conductivity of 5300 W / m·K allows heat to be evenly distributed along the scapular region;

[0098] Pulse temperature control: The control module 5 adjusts the power through PWM pulse width modulation to achieve precise temperature control of ±0.5℃.

[0099] Extremely cold environment -10℃: Full power heating maintains the perceived temperature above 32℃;

[0100] During the transitional season (10-15℃): Low-power intermittent heating, such as heating for 30 seconds every 10 minutes, provides up to 12 hours of continuous use.

[0101] The innermost thermal energy buffer is the thermosensitive phase change material layer 427, which is a paraffin / graphene composite phase change material with a phase change temperature of 25℃±1℃, a latent heat of phase change of ≥180J / g, and a thermal response time of ≤5 minutes. It is encapsulated in a 0.1mm thick TPU film to prevent leakage.

[0102] In working condition:

[0103] It absorbs heat and stores energy. When the ambient temperature is >28℃ or the power of the heating film is too high, the phase change material changes from solid to liquid to absorb excess heat.

[0104] Heat exothermic compensation: when the temperature is <22℃, the material solidifies and releases stored heat energy to maintain a stable perceived temperature.

[0105] Thermal inertia suppression buffers sudden temperature changes, such as the instant one steps out of an air-conditioned room, through the phase transition process.

[0106] When experiencing a drastic temperature change, such as moving from a 25°C indoor environment to a -5°C outdoor environment, the phase change layer releases stored heat to slow down the drop in perceived temperature.

[0107] In energy-saving mode, when the heating film operates intermittently, the phase change layer maintains a temperature fluctuation of ≤1.5℃.

[0108] Temperature sensor 7, using an NTC thermistor with an accuracy of ±0.1℃, is embedded between the phase change layer and the heating film;

[0109] Control module 5 uses an ARM Cortex-M0 chip and runs a PID algorithm;

[0110] The Power Bank 6 uses a 1000mAh flexible lithium battery with a thickness of 3mm and supports wireless fast charging, charging to 50% in 15 minutes.

[0111] The data acquisition temperature sensor monitors the surface temperature of the heating film and the ambient temperature every second. If the detected temperature is >39℃, the control module 5 reduces the power of the heating film or starts the phase change layer to absorb heat. If the temperature is <31℃, the phase change layer heat release mode is activated and the heating power is increased. The device connects to a mobile APP via Bluetooth 4.2 module to preset the temperature curve or adjust it manually. Example

[0112] Reference Figure 4-9 As shown, this embodiment is a further optimization based on embodiment 2. The connecting area 43 consists of a first Velcro 431 sewn onto the back piece 2 of the shirt and a second Velcro 432 sewn onto the outer flap 41. Through the cooperation of the first Velcro 431 and the second Velcro 432, the outer flap 41 is rotatably mounted on the back piece 2 of the shirt.

[0113] As a further improvement, the inner side of the outer hinge 41 is provided with an airflow guiding groove 411, and the airflow guiding groove 411 includes multiple radial three-dimensional protrusions 412.

[0114] The protruding ribs 412 have a height of 0.3-0.5mm and a spacing of 2-3mm, forming an air convection channel.

[0115] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above utility model, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming.

[0116] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0117] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A shirt with a hinged back flap, comprising a front piece (1), a back piece (2), sleeve pieces (3), and a back flap structure (4), characterized in that: The rear composite structure (4) consists of an outer hinge (41) and a replaceable inner insert (42); The lower edge of the outer flap (41) is connected to the back piece (2) of the shirt through the connecting area (43), so that the outer flap (41) can be opened and closed along the connecting area (43); The connecting area (43) is reinforced by a bar stitching line to form a positioning line (44) that runs through the width of the rear end.

2. A shirt with a hinged back cover according to claim 1, characterized in that: The outer hinge (41) has an invisible fastening component at its opening and closing end, which includes a magnetic button (45) or a micro zipper (46). The fixing component is completely hidden inside the outer hinge (41) and is flush with the outer fabric when closed.

3. A shirt with a hinged back cover according to claim 1, characterized in that: The replaceable inner insert (42) is an independent functional module, and the inner insert (42) is connected to the rear piece (2) through a slot structure; The slot-type structure includes a flexible guide rail (421) sewn onto the back piece (2) and an elastic clip (422) on the edge of the inner insert (42). The inner insert (42) is installed and fixed by the cooperation of the elastic clip (422) and the flexible guide rail (421).

4. A shirt with a hinged back cover according to claim 3, characterized in that: The inner layer insert (42) is provided with a plurality of meshes (424). The inner layer insert (42) includes a hydrophobic coating (425) on the outer surface, a composite graphene heating film (426) in the middle layer, and a thermosensitive phase change material layer (427) in the innermost layer. The composite graphene heating film (426) is connected to a power supply interface (428) via a micro USB. The phase change temperature threshold of the thermosensitive phase change material layer (427) is 25℃±3℃. It also includes a control module (5) and a power supply (6), wherein the control module (5) is electrically connected to the power supply (6) and the composite graphene heating film (426).

5. A shirt with a hinged back cover according to claim 1, characterized in that: The connecting area (43) consists of a first Velcro (431) sewn onto the back piece (2) of the shirt and a second Velcro (432) sewn onto the outer flap (41). Through the cooperation of the first Velcro (431) and the second Velcro (432), the outer flap (41) is rotated and installed on the back piece (2) of the shirt.

6. A shirt with a hinged back cover according to claim 5, characterized in that: The outer hinge (41) has an airflow guide groove (411) on its inner side, and the airflow guide groove (411) includes multiple radial three-dimensional protrusions (412). The protruding ribs (412) have a height of 0.3-0.5 mm and a spacing of 2-3 mm, forming an air convection channel.

7. A shirt with a hinged back cover according to claim 4, characterized in that: A temperature sensor (7) is provided in the middle layer of the inner insert (42), and the temperature sensor (7) is electrically connected to the control module (5).

8. A shirt with a hinged back cover according to claim 3, characterized in that: The slot-type fabric guide rail is embedded with an arc-shaped memory alloy wire (423). The shape memory alloy wire expands linearly by 0.5-1.2 mm at a temperature ≥37℃, and the shape memory alloy wire abuts against the elastic clip (422).

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