A handheld foldable shield with origami bistable structure

Abstract

The present invention discloses a handheld foldable shield with an origami bistable structure that can be spliced ​​and belongs to the technical field of protective equipment. The present invention includes a protective plate, a flexible outer layer, a handle, a metal hinge, a latch, a lock, and a connecting rod. The high toughness of the composite material is used to form an origami bistable overall structure. The protective plates are arranged inside the flexible outer layer according to a set rule, connected with the flexible outer layer to form a whole, and necessary constraints are imposed by rigid connecting parts; there are gaps as creases between adjacent protective plates, so that the protective shield can be folded along the creases and then stored; the latch is located at both ends of the seam between the two folding units of the shield, and is locked when the shield is unfolded to fix the overall structure. The present invention can achieve the effect of reducing the number of locking mechanisms and reducing the volume, while maximizing the stability of the overall structure of the shield. It can solve the problems of small protective area, inconvenience in carrying, and inability to provide multi-directional protection of the protective shield while meeting the requirements for bullet protection.

Description

Technical Field

[0001] The invention relates to a single-soldier handheld protective shield, in particular to an origami bistable structure foldable and splicable handheld protective shield, belonging to the technical field of protective equipment. Background Art

[0002] Shields can be used to defend against attacks by rioters with stones, sticks, sharp weapons, bullets or explosives, and to protect the personal safety of police officers.

[0003] At present, traditional bulletproof shields in China are generally handheld or wheeled. Handheld bulletproof shields can only provide protection for one person, and are large in area, making them inconvenient to carry when not in use; wheeled bulletproof shields are bulky, and are inconvenient to transport and maneuver. For the above reasons, when performing their duties, police officers are unable to provide coordinated protection, or are unable to maneuver quickly to respond to special security situations.

[0004] At present, traditional shields in China generally only provide one-way bulletproof function. In the complex environment of actual combat, on-duty personnel may face security threats from the side, top and other directions. In this regard, traditional shields require users to rotate their bodies to change direction, which is easy to lose sight of one thing while focusing on another. Summary of the invention

[0005] The main purpose of the present invention is to provide a handheld foldable shield with an origami bistable structure, which can meet the requirements of bullet protection while solving the problems of the existing protective shields such as small protective area, inconvenience in carrying and inability to provide multi-directional protection.

[0006] The present invention adopts the following technical solutions to solve the above technical problems:

[0007] The invention discloses a handheld foldable shield with an origami bistable structure which can be spliced ​​and folded, comprising a protective plate, a flexible outer layer, a grip, a metal hinge, a latch, a lock, and a connecting rod.

[0008] The protective plates are arranged inside the flexible outer layer according to a set rule, connected with the flexible outer layer to form a whole, and necessary constraints are imposed by rigid connection components; there are gaps as creases between adjacent protective plates, so that the protective shield can be folded along the creases and stored. The rigid connection components include hinges.

[0009] The protective plate is made of ultra-high molecular weight polyethylene fiber, with high elastic thermoplastic resin as the matrix, and is laminated by orthogonal UD structure, with a thickness ranging from 5mm to 22mm. The flexible outer layer uses nylon high-strength cloth as a heat insulation, flame retardant and waterproof layer.

[0010] The shield is equipped with a slender seam protection plate fixed to the protective plate on the bullet-facing surface of some protective plates, and the seams are protected by the seam protection plate. For seams where it is inconvenient to fix the seam protection plate on the bullet-facing surface of the protective plate, a non-fixed seam protection plate is installed on the back side using a flexible structure. At the intersection of the seams of the seam protection plate in the structure, a small protection plate is fixedly installed on the bullet-facing surface to protect the intersection. All seams are spliced ​​with a staggered structure, and the staggered direction is opposite to the installation position of the protective plate, forming a "concave" shaped slot on one side of the seam.

[0011] The protective plate is composed of three hard protective plates as a folding unit; the protective shield includes two folding units; the two folding units are symmetrically extended along the length direction to form the protective shield. The three hard protective plates in each folding unit include two identical right-angled trapezoids and one isosceles trapezoid. The waist lengths of the three trapezoids are equal, and both sides of the seam are the waists of the isosceles trapezoid and the waists of the right-angled trapezoid. The folding unit formed by splicing takes the symmetry axis of the isosceles trapezoid as the axis to form axial symmetry. The three protective plates between each folding unit are connected in pairs with metal full-edge hinges, and the folding and opening directions of the two right-angled trapezoidal protective plates are the same; between the folding units, metal hinges are used to connect the upper bottom of the isosceles trapezoidal protective plates, and the other two seams are flexibly fixed with a high-strength flexible structure.

[0012] The metal hinge is used to connect the seams between two folding units of the shield.

[0013] The latches are located at both ends of the seam between the two folding units of the shield and are locked when the shield is unfolded to fix the overall structure.

[0014] The lock buckle and the connecting rod are installed at the midpoint of the two long sides of the shield and the midpoint of each right-angle trapezoid height of the two short sides of the shield, so that the two shields can be spliced ​​in the horizontal or vertical direction.

[0015] The gaps between the shield plates form creases, allowing the plates to be folded along the creases. The locks installed on the shield plates can be spliced ​​with another shield in the same expanded state in the horizontal or vertical direction when the shield is in the expanded state, forming a larger shield to provide coordinated protection and meet more tactical needs. At the same time, the spliced ​​shields can be rotated at a certain angle to provide multi-angle and multi-directional protection.

[0016] The handle is installed on the back surface of the shield, which is convenient for users to hold the shield for use.

[0017] The working method of the origami bistable structure handheld splicable folding shield disclosed by the present invention is as follows:

[0018] Step 1), the shield folded state is taken as the first stable state, the shield fully unfolded state is taken as the second stable state, and the shield half unfolded state is taken as the unstable state.

[0019] Step 2), the bistable structure has a certain resistance during the shield fully unfolding process, that is, the switching process between the unstable state and the second stable state. The resistance effect during the switching process is achieved based on the high toughness of the material used in the shield.

[0020] Step 3), when the shield is unfolded, a mechanical structure is used to lock the key point of steady-state switching, which can hinder the steady-state switching, that is, to ensure that the folding shield is not easy to collapse when it is hit by bullets in the unfolded state. In this way, the number of locking mechanisms of the splicable folding shield is reduced, the volume is reduced, and the overall structural stability of the shield is maximized, ensuring the stability of the folding shield structure when it is impacted by bullets in the unfolded state.

[0021] Beneficial effects:

[0022] 1. The present invention discloses a handheld foldable shield with an origami bistable structure. The gaps between the shield protective plates form creases, so that the protective plates can be folded along the creases, which is convenient for carrying and transportation and meets more practical needs.

[0023] 2. The present invention discloses a handheld foldable shield with an origami bistable structure that can be spliced ​​together. The lock and connecting rod installed on the protective plate can be spliced ​​with another shield in the same unfolded state in the horizontal or vertical direction when the shield is unfolded to form a whole shield with a larger area. The spliced ​​shields can be rotated at a certain angle to provide multi-angle and multi-directional protection, thereby ensuring the personal safety of combatants to a greater extent.

[0024] 3. The present invention discloses a handheld foldable shield with an origami bistable structure. The shield is provided with an elongated seam protective plate fixed to the protective plate on the bullet-facing surface of part of the protective plate, and the seam is protected by the seam protective plate. For the seams where it is inconvenient to fix the seam protective plate on the bullet-facing surface of the protective plate, a non-fixed seam protective plate is installed on the back side using a flexible structure. At the intersection of the seams of the seam protective plates in the structure, a small protective plate is fixedly installed on the bullet-facing surface to protect the intersection. All seams are spliced ​​with an interlaced structure, and the interlacing direction is opposite to the installation position of the protective plate, forming a "concave"-shaped slot on one side of the seam. The above-mentioned technical measures are used to improve the all-round protection capability of the bullet-facing surface of the splicable foldable shield when it is in use.

[0025] 4. The present invention discloses an origami bistable handheld foldable shield that can be spliced, which utilizes the high toughness of composite materials to form an origami bistable overall structure. The structure arranges six protective plates inside a flexible outer layer according to a set rule, and the protective plates are connected to the flexible outer layer to form a whole, while necessary constraints are imposed by rigid connecting parts such as hinges; the bistable characteristics of the structure can improve the structural strength, and ensure that the foldable shield is not easy to collapse when impacted by bullets when in the unfolded state while minimizing the use of restraints such as locks. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the foldable shield after it is stored;

[0027] Figure 2 It is a schematic diagram of the unfolded foldable shield and a schematic diagram of the reinforcement structure at the crease of the bullet-facing surface;

[0028] Figure 3 This is a schematic diagram of the reinforcement structure at the crease of the back surface of the foldable protective shield;

[0029] Figure 4 The shield is connected in horizontal and vertical directions and the schematic diagram of the connection device;

[0030] Figure 5 It is a schematic diagram of the staggered structure of the joints of the protective plate;

[0031] Figure 6 It is a schematic diagram of the connection and fixing structure of two isosceles trapezoidal protective plates.

[0032] Among them: 1-protective plate, 2-seam protective plate, 3-corner protective plate, 4-back seam protective plate, 5-connecting rod, 6-lock, 7-lock, 8-connecting rod, 9-handle, 10-button, 11-back seam protective plate, 12-protective plate, 13-protective plate, 14-metal hinge, 15-latch / lock device. DETAILED DESCRIPTION

[0033] In order to better illustrate the purpose and advantages of the present invention, the invention is further described below with reference to the accompanying drawings and examples.

[0034] Embodiment 1:

[0035] The embodiment discloses a handheld foldable shield with an origami bistable structure, which can meet the requirements of bullet protection while solving the problems of existing protective shields with small protective area, inconvenient to carry and inability to provide multi-directional protection. Figure 1 , Figure 2As shown, the present embodiment discloses an origami bistable handheld foldable shield, comprising: six protective plates arranged inside a flexible outer layer according to a set rule, the protective plates being connected to the flexible outer layer to form a whole, and necessary constraints being imposed by rigid connection components such as hinges; there are gaps between adjacent protective plates as folds, so that the protective shield can be folded along the folds and stored.

[0036] like Figure 2 As shown: the protective plate 1 is composed of three pieces of the hard protective plates as a folding unit; the protective shield includes two of the folding units; the two folding units are symmetrically extended along the length direction to form the protective shield. Specifically: the three pieces of the hard protective plates in each folding unit include two identical right-angled trapezoids and one isosceles trapezoid. The waist lengths of the three trapezoids are equal, and both sides of the seam are the waists of the isosceles trapezoid and the waists of the right-angled trapezoid. The folding unit formed by splicing takes the symmetry axis of the isosceles trapezoid as the axis to form an axial symmetry.

[0037] Embodiment 2:

[0038] like Figure 2 , Figure 3 As shown, the present embodiment discloses a handheld foldable shield with an origami bistable structure, in which a slender seam protection plate 2 fixed to the protective plate is provided on the bullet-facing surface of a part of the protective plate to protect the seam. For the seams where it is inconvenient to fix the seam protection plate on the bullet-facing surface of the protective plate, a non-fixed back seam protection plate 4 is installed on the back side using a flexible structure. At the intersection of the seams of the seam protection plates in the structure, a small corner point protection plate 3 is fixedly installed on the bullet-facing surface to protect the corner point.

[0039] Embodiment 3:

[0040] like Figure 3 As shown: This embodiment discloses an origami bistable structure handheld foldable shield that can be spliced ​​together. Lock buckles 6 and connecting rods 5 that match them are fixedly installed at the midpoints of the two long sides of the shield, and lock buckles 7 and connecting rods 8 that match them are fixedly installed at the midpoints of each right-angled trapezoid height of the two short sides of the shield, so that the two shields can be spliced ​​together in the horizontal or vertical direction. Figure 4 When splicing, it can be quickly connected by simply pressing the rod towards the lock. When disassembling, it can be quickly unlocked by pressing the button 10 and pulling the shields apart from each other.

[0041] The buckle installed on the protective plate can be spliced ​​with another shield in the horizontal or vertical direction when the shield is in the unfolded state, forming a larger shield to provide coordinated protection and meet more tactical needs. At the same time, the spliced ​​shields can be rotated at a certain angle to provide multi-angle and multi-directional protection.

[0042] like Figure 3As shown, a handle 9 is installed on the back surface of the shield, which is convenient for the user to hold the shield for use.

[0043] Embodiment 4:

[0044] like Figure 5 As shown, the present embodiment discloses an origami bistable handheld foldable shield, in which all seams are spliced ​​with a staggered structure. For example, 12 and 13 are two protective plates, and staggered seams are formed between the two. After the shield is unfolded, the staggered seams cooperate with the back protective plate 11 to effectively prevent oblique bullets from passing through the seams.

[0045] Embodiment 5:

[0046] like Figure 6 As shown, the present embodiment discloses an origami bistable handheld foldable shield, wherein two folding units are connected at the bottom of the isosceles trapezoidal protective plate by a fully-wrapped metal hinge 14, and both ends of the joint are connected by a latch / locking device 15, which is locked when the shield is unfolded to fix the overall structure.

[0047] This embodiment discloses an origami bistable handheld foldable shield, and the key structure preparation and installation process involved is as follows:

[0048] The protective plate is made of ultra-high molecular weight polyethylene fiber, with a high-elastic thermoplastic resin as the matrix, and is laminated using an orthogonal UD structure with a thickness ranging from 5mm to 22mm.

[0049] The flexible outer layer uses high-strength nylon fabric as a heat-insulating, flame-retardant and waterproof layer.

[0050] A water jet cutting machine is used to punch holes in the protective plate, and hinges and other metal parts are installed thereon through mechanical connection.

[0051] This embodiment discloses an origami bistable handheld foldable shield, and the specific implementation steps are as follows:

[0052] Step 1), the shield folded state is taken as the first stable state, the shield fully unfolded state is taken as the second stable state, and the shield half unfolded state is taken as the unstable state.

[0053] Step 2), the bistable structure has a certain resistance during the shield's full deployment, that is, the switching between the unstable state and the second stable state. This effect is achieved based on the high toughness of the material used in the shield.

[0054] Step 3), when the shield is unfolded, a mechanical structure is used to lock the key point of steady-state switching, which can hinder the steady-state switching, that is, to ensure that the folding shield is not easy to collapse when it is impacted by bullets or the like in the unfolded state.

[0055] The specific description above further illustrates the purpose, technical solutions and beneficial effects of the invention in detail. It should be understood that the above is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An origami bistable handheld foldable shield, characterized by: It includes a protective plate, a flexible outer layer, a handle, a metal hinge, a latch, a lock, and a connecting rod; The protective plate is composed of three hard protective plates as a folding unit; the shield includes two folding units; the two folding units are symmetrically extended along the length direction to form a shield; the three hard protective plates in each folding unit include two identical right-angled trapezoids and one isosceles trapezoid; the waist lengths of the three trapezoids are equal, and both sides of the seam are the waists of the isosceles trapezoid and the waists of the right-angled trapezoid; the folding unit formed by splicing takes the symmetry axis of the isosceles trapezoid as the axis to form axial symmetry; the three protective plates between each folding unit are connected in pairs with metal full-edge hinges, and it is ensured that the folding and opening directions of the two right-angled trapezoidal protective plates are the same; between the folding units, metal hinges are used to connect the bottom of the isosceles trapezoidal protective plates, and the other two seams are flexibly fixed with a high-strength flexible structure; The protective plates are arranged inside the flexible outer layer according to a set rule, connected with the flexible outer layer to form a whole, and necessary constraints are imposed by rigid connection components; there are gaps as creases between adjacent protective plates, so that the shield can be folded along the creases and then stored; The latch is located at both ends of the seam between the two folding units of the shield and is locked when the shield is unfolded to fix the overall structure; The gaps between the shield protective plates form creases, so that the protective plates can be folded along the creases; the locks installed on the protective plates can be spliced ​​with another shield in the same unfolded state in the horizontal or vertical direction when the shield is unfolded, forming a whole shield with a larger area, providing coordinated protection and meeting more tactical needs; at the same time, the spliced ​​shields can be rotated at a certain angle to provide multi-angle and multi-directional protection; The shield is provided with a slender seam protection plate fixed to the protective plate on the bullet-facing surface of some protective plates, and the seams are protected by the seam protection plate; for the seams where it is inconvenient to fix the seam protection plate on the bullet-facing surface of the protective plate, a non-fixed seam protection plate is installed on the back side using a flexible structure; at the intersection of the seams of the seam protection plate in the structure, a small protection plate is fixed on the bullet-facing surface to protect the intersection; all seams are spliced ​​with a staggered structure, and the staggered direction is opposite to the installation position of the protective plate, forming a "concave"-shaped slot on one side of the seam; The lock buckle and the connecting rod are installed at the midpoint of the two long sides of the shield and the midpoint of the height of each right-angled trapezoid of the two short sides of the shield, so that the two shields can be spliced ​​in the horizontal or vertical direction; The working method is: Step 1), the shield folded state is taken as the first stable state, the shield fully unfolded state is taken as the second stable state, and the shield half unfolded state is taken as the unstable state; Step 2), the bistable structure has a certain resistance during the shield's full deployment process, that is, the switching process between the unstable state and the second stable state; the resistance effect during the switching process is achieved based on the high toughness of the material used in the shield; Step 3), when the shield is unfolded, a mechanical structure is used to lock the key point of steady-state switching, which can hinder the steady-state switching, that is, to ensure that the folding shield is not easy to collapse when it is impacted by bullets in the unfolded state; thereby, the number of locking mechanisms of the splicable folding shield is reduced, the volume is reduced, and the overall structural stability of the shield is maximized, ensuring the stability of the folding shield structure when it is impacted by bullets in the unfolded state.

2. The origami bistable handheld foldable shield as claimed in claim 1, characterized in that: The protective plate is made of ultra-high molecular weight polyethylene fiber, with high elastic thermoplastic resin as the matrix, and is laminated by orthogonal UD structure, with a thickness ranging from 5mm to 22mm; the flexible outer layer uses nylon high-strength cloth as a heat-insulating, flame-retardant and waterproof layer.

3. The origami bistable handheld foldable shield as claimed in claim 2, characterized in that: The rigid connection component comprises a hinge; the metal hinge is used to connect the seams between two folding units of the shield.

4. The origami bistable handheld foldable shield as claimed in claim 1, characterized in that: The handle is installed on the back surface of the shield, which is convenient for users to hold the shield for use.

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