Handrail device for a vehicle and vehicle and method for use of the handrail device

Abstract

This invention relates to the field of vehicle technology, specifically to a handrail device for vehicles, comprising: at least one mounting base fixedly installed to the vehicle roof, having a first thread at one end remote from the roof; a device body integrating a window breaker hammer; and at least one connector rotatably connected to the device body, having a second thread engaging with the first thread. When the second thread engages with the first thread, the device body is mounted to the mounting base via the connector to form a handrail for vehicle occupants to grip. By rotating the connector, the second thread disengages from the first thread, and the device body, together with the connector, separates from the mounting base, allowing vehicle occupants to use the window breaker hammer to break a window. The invention also relates to a vehicle and a method of using the handrail device. This achieves a balance between structural stability in daily use and rapid disassembly in emergency situations, improving safety and user experience.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more specifically to a handrail device for a vehicle, a vehicle, and a method of using the handrail device. Background Technology

[0002] In recent years, with the continuous growth of vehicle ownership, the frequency of traffic accidents has also increased. In many traffic accident cases, after a vehicle suffers a collision, rollover, or falls into water, the door structure often fails to open properly due to deformation, locking mechanism failure, or external pressure, leaving occupants trapped and unable to escape. In such emergencies, breaking the car window to escape is widely considered an effective self-rescue method. Therefore, equipping vehicles with tools capable of quickly breaking car windows is of great significance in increasing the survival rate of occupants after an accident and effectively ensuring their personal safety.

[0003] Currently, most car window-breaking tools on the market are sold as standalone devices, such as standalone window breaker hammers or multi-functional safety hammers. These tools require occupants to first locate their storage location and retrieve them before breaking the window. However, in emergency situations following a traffic accident, the vehicle's interior space may be severely reduced due to collision deformation, and items inside may be scattered and displaced due to inertia. Furthermore, occupants may be injured, disoriented, or restrained by seatbelts, making it extremely difficult for them to accurately locate and retrieve the standalone window-breaking tool in a short time. In addition, some car owners, after purchasing standalone window-breaking tools, often place them in the glove box, door panel storage compartments, or even the trunk. These locations may be inaccessible in an emergency due to vehicle deformation or obstruction by objects, essentially negating their emergency function. Therefore, standalone window-breaking tools have significant shortcomings in terms of accessibility and operability in emergency situations. Summary of the Invention

[0004] Therefore, the purpose of this invention is to provide an improved handrail device for a vehicle, an improved vehicle, and an improved method of using the handrail device, so as to improve the availability of window-breaking tools in accident scenarios and prevent accidental detachment during daily use.

[0005] According to a first aspect of the invention, a handrail device for a vehicle is provided, wherein the handrail device comprises: at least one mounting base configured to be fixedly mounted to the roof of the vehicle, the mounting base having a first thread at an end remote from the roof; a device body integrating a window breaker hammer; and at least one connector rotatably connected to the device body, the connector having a second thread engaging with the first thread, the connector being configured to mount the device body to the mounting base via the connector when the second thread engages with the first thread, thereby forming a handrail for a vehicle occupant to grip, wherein by rotating the connector, the second thread disengages from the first thread, and the device body, together with the connector, separates from the mounting base, thereby allowing a vehicle occupant to use the window breaker hammer to perform a window-breaking operation.

[0006] According to an optional embodiment of the present invention, the first threaded configuration is an external thread provided on the outer peripheral surface of the mounting base, and the second threaded configuration is an internal thread provided on the inner peripheral surface of the connector.

[0007] According to an optional embodiment of the present invention, the connector and the device body are connected by a nested mating structure to achieve circumferential rotation around the corresponding axis and axial positioning along the corresponding axis direction.

[0008] According to an optional embodiment of the present invention, the device body is composed of the window-breaking hammer and separate segments that are shaped to fit the window-breaking hammer along the longitudinal direction of the device body.

[0009] According to an optional embodiment of the present invention, the at least one mounting base includes a first mounting base and a second mounting base that are independent of each other, and the at least one connector includes a first connector adapted to be threadedly engaged with the first mounting base and a second connector adapted to be threadedly engaged with the second mounting base, wherein the first connector and the second connector are respectively located at both ends of the device body.

[0010] According to an optional embodiment of the present invention, the window-breaking hammer has a first hammer end and a second hammer end, the first connecting member is disposed at the first hammer end and rotatably engages with the first hammer end, the split segment has a first segment end and a second segment end, the second connecting member is disposed at the first segment end and rotatably engages with the first segment end, the second hammer end and the second segment end are connected as one unit by complementary outer contours in the assembled state of the handrail device, and the engagement connection is maintained in the state where the second thread engages with the first thread, thereby constraining both ends of the device body to the corresponding mounting base.

[0011] According to an optional embodiment of the present invention, the nested mating structure includes a radially narrowed annular groove portion disposed on the outer periphery of the end of the device body and a radially inwardly protruding annular flange portion disposed on the inner periphery of the connector, wherein the annular flange portion is embedded in the annular groove portion, so that the connector can continuously rotate circumferentially about the corresponding axis, while being unable to disengage relative to the device body in the direction along the corresponding axis.

[0012] According to an optional embodiment of the present invention, the first mounting base, the first connector, and the end of the first hammer body constitute a first connecting assembly, and the second mounting base, the second connector, and the end of the first segment constitute a second connecting assembly. The first connecting assembly and the second connecting assembly are symmetrical about the vertical center plane of the handrail device.

[0013] According to an optional embodiment of the present invention, the inner diameter of the annular flange is smaller than the outer diameter of the annular groove on both axial end faces, thereby forming an axial constraint on the connector.

[0014] According to an optional embodiment of the invention, the end of the second hammer is configured as a hard tip capable of shattering a vehicle window.

[0015] According to an optional embodiment of the invention, the hard tip is made of a hard metal material.

[0016] According to an alternative embodiment of the invention, the end of the second segment is configured to accommodate a recess in the assembled state of the rigid tip.

[0017] According to an optional embodiment of the present invention, the first thread of the first mounting base and the first thread of the second mounting base have the same thread direction, such that when the device body is separated from the mounting base, the operator can simultaneously rotate the first connector and the second connector in the same rotation direction so that the threaded connections at both ends of the device body are disengaged synchronously.

[0018] According to an optional embodiment of the present invention, in the assembled state of the handrail device, the rigid tip is embedded in the recess to have a predetermined overlap length along the longitudinal direction of the device body, the predetermined overlap length being set to meet the structural strength requirements of the device body as a handrail when it is subjected to occupant gripping and pulling in daily use.

[0019] According to an optional embodiment of the invention, the mounting base and the connector are made of plastic material.

[0020] According to an optional embodiment of the present invention, the window-breaking hammer body includes a core made of metal material and a plastic covering layer covering the outer layer of the core, wherein the plastic covering layer is integrally formed with the core by injection molding.

[0021] According to an optional embodiment of the present invention, the handrail device is configured such that, after the device body is separated from the mounting base, the second thread can be re-engaged with the first thread by rotating the connector in the opposite direction, thereby reinstalling the device body onto the mounting base to restore the daily handrail function of the handrail device.

[0022] According to a second aspect of the present invention, a vehicle is provided, wherein the vehicle includes a roof, a window glass, and at least one handrail device according to the embodiments of the first aspect described above, the mounting base of the handrail device being fixedly mounted on the roof, and the window-breaking hammer of the handrail device being configured to shatter the window glass after being separated from the mounting base.

[0023] According to a third aspect of the present invention, a method of using a handrail device provided according to the embodiments of the first aspect is provided, wherein the method of use includes the following steps: S100: rotating the connector of the handrail device so that the second thread of the connector gradually disengages from the first thread of the mounting base; S200: after the second thread is completely separated from the first thread, removing the device body together with the connector from the mounting base, thereby enabling the use of a window-breaking hammer integrated in the device body to strike the vehicle window glass to perform a window-breaking operation.

[0024] According to an optional embodiment of the present invention, the method of use further includes the following steps: S300: reassemble the window-breaking hammer body to form the device body, and rotate the connector in the opposite direction to step S100 to re-engage the second thread with the first thread, so as to reinstall the device body together with the connector to the mounting base, thereby restoring the daily handrail function of the handrail device.

[0025] According to certain embodiments of the present invention, by integrating the window-breaking hammer into the device body and employing an engagement connection between the first thread on the mounting base and the second thread on the connector, an effective balance is achieved between structural stability in daily use and rapid disassembly in emergency situations. In daily use, the first and second threads are fully engaged, and the device body is securely mounted to the mounting base via the connector, forming a complete handrail structure for occupants to grip. This structure can withstand the external forces exerted by occupants' daily gripping and pulling without loosening or falling off, thus meeting the safety and reliability requirements of the handrail function during normal vehicle operation. In emergency situations (such as when a traffic accident prevents the door from opening normally), the occupant only needs to rotate the connector to disengage the second thread from the first thread, allowing the device body and connector to be separated from the mounting base, retrieving the window-breaking hammer integrated within the device body for breaking the window and escaping. This effectively solves the problem that existing window-breaking tools require additional configuration and are difficult to obtain quickly in emergency situations. At the same time, the threaded connection method has higher anti-accidental contact performance compared with quick-release structures such as clips, avoiding the defect of the device body falling off due to accidental contact by occupants during daily use, and significantly improving the integration level of vehicle passive safety equipment and emergency escape efficiency. Attached Figure Description

[0026] The invention will now be described in more detail with reference to the accompanying drawings, which will provide a better understanding of its principles, features, and advantages. The drawings include: Figure 1 A schematic perspective view of a vehicle according to an embodiment of the present invention is shown; Figure 2 A partial interior schematic diagram of a vehicle according to an embodiment of the present invention is shown; Figure 3 It shows along Figure 2 A schematic cross-sectional view cut by the cutting line AA; Figure 4 It shows Figure 3 The enlarged view of part B shown; Figure 5 It shows Figure 4 The components are shown in their separated state; Figure 6 It shows Figure 3 The enlarged view of part C shown; Figure 7 It shows Figure 6 The components are shown in their separated state; Figure 8 A schematic scene diagram is shown of a window-breaking operation using a window-breaking hammer body of a handrail device according to an embodiment of the present invention; Figure 9A schematic flowchart illustrating a method of using the handrail device according to an embodiment of the present invention is shown; and Figure 10 A schematic flowchart illustrating a method of using the handrail device according to an embodiment of the present invention is shown. Detailed Implementation

[0027] To make the technical problems to be solved, the technical solutions, and the beneficial technical effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and several exemplary embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the scope of protection of the present invention. Various embodiments may share the same view or multiple views for description, but not all features appearing in the same view should be interpreted as features that must be present in an embodiment.

[0028] Figure 1 A schematic perspective view of a vehicle 2000 according to an embodiment of the present invention is shown; Figure 2 A partial schematic diagram of the interior of a vehicle 2000 according to an embodiment of the present invention is shown.

[0029] like Figure 2 Combination Figure 1 As shown, vehicle 2000 is exemplarily a passenger car, including a roof 2001, window glass 2002, and at least one (in Figure 2 Two armrest devices 1000 are illustrated below (two examples are shown). The headliner 2001 of the vehicle 2000 is located at the top of the passenger compartment and typically consists of a body sheet metal structure and an interior trim panel (headliner) covering its inner surface. The armrest device 1000 is installed at the headliner 2001 so that occupants of the corresponding seats can easily grip and use it. The window glass 2002 is any type of window glass used in the vehicle, typically made of tempered glass or laminated glass.

[0030] Figure 3 It shows along Figure 2 A schematic cross-sectional view cut by the cutting line AA.

[0031] like Figure 3 Combination Figure 2 As shown, the handrail device 1000 is installed in the roof 2001 area of ​​the vehicle 2000 for occupants to hold onto while the vehicle is in motion, and also integrates an emergency window-breaking function. The handrail device 1000 includes at least one mounting base 1100 (in... Figure 3 The example shows two separate mounting bases 1100, a device body 1200, and at least one connector 1300 (in... Figure 3Two separate connectors 1300 are illustrated in the example. The mounting base 1100 can be configured to be securely mounted to the headliner 2001 or body panel structure of the vehicle 2000 by bolts, clips, or other fastening methods, ensuring its stability during normal vehicle operation and daily use. Preferably, both the mounting base 1100 and the connectors 1300 are made of plastic materials. The selected plastic materials are, for example, engineering plastics suitable for automotive interior parts, such as polypropylene (PP), acrylonitrile-butadiene-styrene copolymer (ABS), polycarbonate (PC), polyamide (PA, i.e., nylon), or their glass fiber reinforced composites. These engineering plastics possess good mechanical strength, stiffness, abrasion resistance, and fatigue resistance, meeting the structural strength and durability requirements of the mounting base and connectors when subjected to thread engagement forces, occupant gripping and pulling forces, and vehicle vibration loads.

[0032] Figure 4 It shows Figure 3 The enlarged view of part B shown; Figure 5 It shows Figure 4 The components are shown in their separated state; Figure 6 It shows Figure 3 The enlarged view of part C shown; Figure 7 It shows Figure 6 The components are shown in their separated state; Figure 8 A schematic scene diagram is shown of a window breaking operation using the window-breaking hammer 1210 of the handrail device 1000 according to an embodiment of the present invention.

[0033] like Figure 5 and Figure 7 Combination Figure 3 As shown, the mounting base 1100 has a first thread 100 at one end away from the roof 2001 (i.e., the end extending toward the vehicle interior space), which is exemplarily configured here as an external thread arranged along the outer peripheral surface of the mounting base 1100. Figure 3As can be seen, the device body 1200 is the main structure of the handrail device 1000, and it integrates a window-breaking hammer 1210, which has sufficient hardness and mass to shatter the tempered glass of a vehicle. Preferably, the window-breaking hammer 1210 adopts a composite structure of metal and plastic, which includes a core made of metal material and a plastic covering layer covering the core. The metal core is the core functional component of the window-breaking hammer, which provides sufficient mass (inertial force) and hardness (penetrating force) to shatter the tempered glass of the vehicle window during the window-breaking operation. The metal core is preferably made of hard metal materials such as carbon steel, alloy steel, stainless steel, or tungsten steel, and it can extend throughout the entire internal space of the window-breaking hammer in the longitudinal direction, or at least extend to the key area containing the hard tip. The plastic covering layer covers the outer surface of the metal core and is integrated with the metal core by injection molding.

[0034] like Figures 4 to 7 Combination Figure 3 As shown, the connector 1300, schematically shown in semi-transparent gray, is a key component for realizing the detachable connection between the device body 1200 and the mounting base 1100. It is connected to the device body 1200 in a rotatable manner, that is, the connector 1300 can rotate circumferentially relative to the device body 1200 around its corresponding rotation axes 10, 20, but the two remain connected and do not separate in the axial direction.

[0035] like Figure 5 and Figure 7 Combination Figure 3 As shown, the connector 1300 has a second thread 200 that mates with the first thread 100 of the mounting base 1100. As illustrated in the attached embodiment, when the first thread 100 is an external thread, the second thread 200 is a matching internal thread. Under normal use, the second thread 200 of the connector 1300 and the first thread 100 of the mounting base 1100 are fully engaged and locked. The device body 1200 is securely mounted on the mounting base 1100 via the connector 1300. The entire handrail device 1000 forms a complete handrail structure, allowing occupants to safely grip and pull it during vehicle operation. Figure 2 and Figure 3 As shown. When a traffic accident or other emergency prevents the car door from opening normally, the occupant can rotate the connector 1300. Since the connector 1300 can rotate freely relative to the device body 1200, the operator only needs to rotate the connector 1300 to gradually move the second thread 200 from the first thread 100 (as shown). Figure 5 and Figure 7(Indicated by the thick arrow) Retract downwards until completely disengaged. After the threads are disengaged, the device body 1200, together with the connector 1300, can be detached from the mounting base 1100. The occupants can then use the window-breaking hammer 1210 integrated in the device body 1200 to break the vehicle window glass 2002 and escape through the window. Figure 8 As shown.

[0036] In a preferred embodiment, the handrail device 1000 is configured to have a reversible disassembly and assembly function. That is, after the device body 1200 is separated from the mounting base 1100 and the window breaking operation is completed, the second thread 200 can be re-engaged with the first thread 100 by rotating the connector 1300 in the opposite direction, thereby reinstalling the device body 1200 onto the mounting base 1100 to restore the daily handrail function of the handrail device 1000.

[0037] like Figures 4 to 7 Combination Figure 3As shown, at least one mounting base 1100 may specifically include a first mounting base 1110 and a second mounting base 1120, which are independent of each other. These two mounting bases 1100 are spaced apart along the longitudinal direction of the armrest device at the vehicle roof 2001 and are respectively fixedly mounted to the roof 2001. Each of the first mounting base 1110 and the second mounting base 1120 has a first thread 100 at its end away from the roof 2001, i.e., each has an external thread for engaging with a connector. Correspondingly, at least one connector 1300 may specifically include a first connector 1310 and a second connector 1320. The first connector 1310 is adapted to be threadedly engaged with the first mounting base 1110, and the second connector 1320 is adapted to be threadedly engaged with the second mounting base 1120. The first connector 1310 and the second connector 1320 are respectively located at both ends of the device body 1200, i.e., each end of the device body 1200 is provided with a connector. In the normal assembly state, one end of the device body 1200 is connected to the first mounting base 1110 through the internal thread of the first connector 1310 engaging with the external thread of the first mounting base 1110, and the other end is connected to the second mounting base 1120 through the internal thread of the second connector 1320 engaging with the external thread of the second mounting base 1120, so that the device body 1200 spans between the two mounting bases, forming a handrail that the occupant can stably grip. In case of an emergency requiring disassembly, the operator needs to rotate the first connector 1310 and the second connector 1320 separately or simultaneously to disengage the threaded connections at both ends, after which the device body 1200, along with the two connectors, can be completely removed from the two mounting bases. The independent mounting bases and connectors at both ends ensure that the handrail device is reliably fixed at both ends during daily use, with strong load-bearing capacity and is not easy to fall off due to single-point failure. At the same time, the threaded design at both ends provides double protection in emergency disassembly operations, preventing the handrail from falling off unexpectedly due to accidental contact or loosening on one side.

[0038] In a preferred embodiment, the first thread 100 of the first mounting base 1110 and the first thread 100 of the second mounting base 1120 are designed to have the same thread direction, for example, both are right-hand threads or both are left-hand threads. The purpose of this design is that when the operator needs to separate the device body 1200 from the mounting base 1100 in an emergency, the first connector 1310 and the second connector 1320 can be rotated simultaneously in the same direction, thereby causing the threaded connections at both ends of the device body 1200 to disengage synchronously. Specifically, the operator holds the first connector 1310 and the second connector 1320 at both ends of the device body with both hands and rotates them simultaneously in the same direction (e.g., both counterclockwise or clockwise). Since the threads at both ends have the same direction, the rotation in the same direction reduces the thread engagement at both ends synchronously until both threads are completely disengaged. At this point, the device body, along with the two connectors, can be removed as a whole. Synchronous disengagement also avoids the problem of the device body deflecting or jamming when only one end is connected after one end has disengaged first, thus ensuring a smoother and more stable disassembly process.

[0039] like Figure 3 As shown, the device body 1200 is not a single, integral part, but rather composed of two independent components: a window-breaking hammer 1210 and a separate section 1220. These components are joined together along the longitudinal direction of the device body 1200 (i.e., the length of the handrail device 1000 in its normal installation state along the direction of the occupant's grip, also known as the transverse direction in the attached diagram). The window-breaking hammer 1210 integrates the window-breaking function, and its interior or end features a hard material structure capable of shattering the vehicle window glass, such as a sharp metal hammerhead. The separate section 1220 is another part of the device body 1200, and it has a complementary shape to the window-breaking hammer 1210 at their longitudinal mating points, allowing them to be assembled into a complete and compact handrail body.

[0040] from Figure 3As can be seen, the window-breaking hammer body 1210 has two ends, namely the first hammer end 1211 and the second hammer end 1212. The first connecting member 1310 is disposed at the first hammer end 1211 and engages with the first hammer end 1211 in a rotatable manner, that is, the first connecting member 1310 is sleeved on the outer periphery of the first hammer end 1211 and can rotate freely around the corresponding axis 10 but cannot be axially dislodged. The split section 1220 also has two ends, namely the first section end 1221 and the second section end 1222. The second connecting member 1320 is disposed at the first section end 1221 and engages with the first section end 1221 in a rotatable manner, and its engagement method is similar to that of the first connecting member 1310 and the first hammer end 1211. The second hammer end 1212 of the window breaker hammer 1210 and the second segment end 1222 of the split section 1220 are located at the middle splicing position of the device body 1200. They have complementary shape profiles. For example, the second hammer end 1212 is constructed as an outwardly protruding tip or wedge-shaped protrusion, while the second segment end 1222 is constructed as a recess or opening that matches the shape of the protrusion. This allows the second hammer end 1212 to be embedded in the second segment end 1222 when the handrail device 1000 is assembled, and the two are spliced ​​together as one unit through shape matching. Since the two ends of the device body 1200 are constrained and fixed by the first mounting base 1110 and the second mounting base 1120 respectively through corresponding connectors in the assembled state, the constraint force presses the window breaker hammer 1210 and the split section 1220 together in the longitudinal direction, so that the shape matching connection in the middle remains stable in the threaded engagement state. Only after the threaded connections at both ends are released and the longitudinal constraint disappears can the window-breaking hammer 1210 be separated from the split section 1220 along the splicing surface. At this point, the operator can remove the window-breaking hammer 1210 and use it alone for window-breaking operations. This design cleverly utilizes the constraint force of the mounting bases at both ends to maintain the integrity of the device body, eliminating the need for an additional locking mechanism.

[0041] like Figure 8 Combination Figure 3As shown, the second hammer end 1212 is the end of the window-breaking hammer 1210 on the splicing surface side (i.e., the side facing the split section 1220), and its structure is a hard tip capable of shattering the vehicle window glass 2002. This hard tip has a sharp geometry, such as a conical tip, a conical protrusion, a pyramidal protrusion, or a polyhedral shape with multiple sharp edges. This geometric design aims to concentrate the impact force during impact on a very small contact area, thereby effectively generating localized high stress on the tempered glass surface, causing the tempered glass to shatter rapidly. This hard tip is preferably made of a hard metal material, such as carbon steel, alloy tool steel, tungsten carbide (hard alloy), or stainless steel, which have high hardness and high impact resistance. The hardness of these metal materials is significantly higher than that of the tempered glass of the vehicle window, ensuring that the tip itself will not deform or break during the impact.

[0042] Correspondingly, as Figure 3 As shown, the end 1222 of the second section is located at the end of the split section 1220 facing the window-breaking hammer 1210. It is constructed as a recessed structure, which, in the assembled state of the handrail device 1000, accommodates the rigid tip formed by the end 1212 of the second hammer of the window-breaking hammer 1210. The inner shape of the recess complements the outer contour of the rigid tip; for example, when the rigid tip is conical, the recess is constructed as a conical cavity; when the rigid tip is a wedge-shaped protrusion, the recess is constructed as a corresponding wedge-shaped groove. The depth and cross-sectional dimensions of the recess are designed to fully or largely accommodate the rigid tip, ensuring that the rigid tip does not protrude from the outer surface of the device body 1200 after being embedded in the recess in the assembled state, thus ensuring that the surface touched by the occupant's hands during daily use of the handrail is smooth and safe. The recessed wall and the surface of the rigid tip can have a tight fit, providing excellent positioning and self-alignment during assembly. This facilitates quick and accurate alignment of the window breaker and the split section during reinstallation of the handrail device. Furthermore, the recessed structure also functions to transfer certain shear and bending loads through shape fit during assembly. When occupants grip and pull the handrail, the splicing surface in the middle of the device body is subjected to bending moment and shear force. The interlocking relationship between the rigid tip and the recess effectively transfers these loads, preventing relative slippage or separation of the device body at the splicing position. The inner wall of the recess can be slightly tapered or chamfered to ensure smooth operation during assembly and disassembly, while providing sufficient friction and contact area in the interlocking state to ensure connection reliability. Through this recessed structure design, the splicing of the split section 1220 and the window breaker 1210 achieves both structural integrity during daily use and ensures the safe availability of the rigid tip in emergencies.

[0043] In a preferred embodiment, when the handrail device 1000 is assembled (i.e., when the device body 1200 is fixed to the mounting base 1100 via the threaded connection of the connector 1300), the hard tip formed by the second hammer end 1212 of the window-breaking hammer 1210 is embedded in the recess formed by the second segment end 1222 of the split segment 1220, with a predetermined overlap length between the two along the longitudinal direction of the device body 1200. This predetermined overlap length is not arbitrarily set, but is determined through specialized structural mechanics calculations and / or experimental verification to meet the structural strength requirements of the device body 1200 when it is used as a handrail in daily life to withstand the gripping and pulling loads of the occupants. Specifically, when the occupant grips the handrail during vehicle acceleration, deceleration, turning, or bumpy driving, a downward pulling force and possible lateral force are applied to the device body. These forces generate bending moments and shear forces at the splicing surface in the middle of the device body. The overlapping and interlocking area between the rigid tip and the recess is the critical section for transmitting these loads—the greater the overlap length, the larger the interlocking area, the greater the shear force and bending moment that can be transmitted, and the higher the structural strength at the splice location. Therefore, the predetermined overlap length is set large enough to ensure that, under normal occupant use conditions and under extreme use conditions considering a certain safety factor, no unexpected separation, relative slippage, or structural fracture of the window-breaking hammer and the split section will occur at the splice surface.

[0044] like Figures 4 to 7 Combination Figure 3 As shown, the connector 1300 and the device body 1200 achieve two main functions through a nested mating structure 1400: circumferential rotational connection around corresponding axes 10 and 20, meaning the connector 1300 can perform continuous, unrestricted circumferential rotational movement relative to the device body 1200 with the corresponding axes 10 and 20 as the rotation center; and axial limiting along the directions of the corresponding axes 10 and 20, meaning the connector 1300 is constrained to the end of the device body 1200 along the directions of the corresponding axes 10 and 20, and cannot detach from the device body 1200 in the axial direction. Figures 4 to 7 As shown, the corresponding axes 10 and 20 are preferably collinear with the thread axis of the mounting base 1100 to ensure that the internal thread of the connector 1300 can smoothly engage or disengage with the external thread of the mounting base during rotation.

[0045] from Figures 4 to 7As can be seen, the nested mating structure 1400 can specifically include two mutually mating structural elements: an annular groove portion 1410 and an annular flange portion 1420. The annular groove portion 1410 is disposed on the outer periphery of the end of the device body 1200. Specifically, the annular groove portion 1410 can be disposed on the outer peripheral surface of the end of the first hammer 1211 and the outer peripheral surface of the end of the first segment 1221. Its construction is an annular groove that decreases radially inward with reference to the corresponding axes 10 and 20 (i.e., the outer diameter at this location is smaller than the outer diameter of the adjacent portion), and this annular groove completely surrounds the outer periphery of the end in the circumferential direction. The annular flange portion 1420 is disposed on the inner periphery of the connector 1300. Its construction is an annular flange that protrudes radially inward with reference to the corresponding axes 10 and 20, and this annular flange also completely surrounds the inner wall of the connector in the circumferential direction. During assembly, the annular flange portion 1420 is embedded in the annular groove portion 1410, forming a mating state in which the flange is accommodated in the groove. Since the annular groove 1410 is continuously continuous in the circumferential direction, the annular flange 1420 can slide freely in the circumferential direction within the annular groove 1410. Therefore, the connector 1300 can rotate continuously and uninterruptedly around the corresponding axes 10 and 20. This continuous rotation capability allows the connector 1300 to rotate multiple times to complete the engagement or disengagement of the thread. At the same time, the annular groove 1410 has stop surfaces (i.e., the two side walls of the annular groove 1410) on both sides in the axial direction, and the annular flange 1420 is confined between these two side walls. The axial width of the annular flange 1420 is slightly smaller than the axial width of the annular groove 1410 to allow the small gap required for rotational movement. Meanwhile, the inner diameter of the annular flange 1420 (i.e., the diameter of the circular opening formed by the annular flange protruding radially inward) is designed to be smaller than the outer diameter of the two end faces of the annular groove 1410 in the axial direction. Therefore, the connector 1300 cannot disengage relative to the device body 1200 in the direction along the corresponding axes 10 and 20; that is, the connector 1300 is securely axially limited at the end of the device body 1200. During assembly, the annular flange 1420 can be inserted into the annular groove 1410 by utilizing the elastic deformation of the material at the end of the connector 1300 or the device body 1200 (e.g., the elastic recovery characteristics of plastic materials) and applying a moderate pressing force to force the annular flange 1420 past the shoulder into the area of ​​the annular groove 1410. After the elastic deformation recovers, the annular flange 1420 is locked in the annular groove 1410. This structure is simple and reliable, ensuring that the connector 1300 will not axially separate from the device body 1200 due to vibration, impact, or loads applied by occupants during normal vehicle operation and daily use.

[0046] like Figure 3As shown, the first mounting base 1110, the first connector 1310, and the first hammer body end 1211 on the right side together constitute a first connecting assembly. This first connecting assembly is located at one end of the handrail device 1000 (in this case, the end closest to the window-breaking hammer body 1210) and is used to achieve a detachable threaded connection between this side of the window-breaking hammer body 1210 and the roof 2001 of the vehicle 2000. The second mounting base 1120, the second connector 1320, and the first segment end 1221 on the left side together constitute a second connecting assembly. This second connecting assembly is located at the other end of the handrail device 1000 (i.e., one end of the split segment 1220) and is used to achieve a detachable threaded connection between this side of the split segment 1220 and the roof 2001 of the vehicle 2000. From Figure 3 It can be seen that the first connecting component and the second connecting component are arranged in a mirror-symmetric manner with respect to the vertical center plane 1001 of the handrail device 1000. This vertical center plane 1001 is a plane perpendicular to the longitudinal direction of the device body 1200 and passes through the midpoint of the device body 1200. The symmetrical design means that the first mounting base 1110 and the second mounting base 1120 have the same structural dimensions and thread specifications, the first connector 1310 and the second connector 1320 have the same structural dimensions and thread specifications, and the shape and size of the nested mating structure 1400 between the first hammer end 1211 and the first segment end 1221 are also symmetrical and consistent. This symmetrical design offers several advantages: First, the rotation and disassembly operations of the connectors at both ends are completely identical, allowing operators to perform quick operations without needing to distinguish between the two ends, reducing cognitive burden in emergency situations; second, the parts are interchangeable, with the first connector 1310 and the second connector 1320 manufactured using the same mold, as are the first mounting base 1110 and the second mounting base 1120, significantly reducing manufacturing costs and the complexity of parts management; furthermore, the symmetrical structure ensures that the handrail device experiences balanced stress at both ends when subjected to gripping and pulling loads from occupants, avoiding stress concentration and structural weakness issues that may result from asymmetrical designs, thus improving overall reliability and service life.

[0047] Figure 9 A schematic flowchart illustrating a method 3000 for using the handrail device 1000 according to an embodiment of the present invention is shown. Figure 9 As shown, the method 3000 includes steps S100 and S200.

[0048] In step S100, the connecting member 1300 of the armrest device 1000 is rotated, causing the second thread 200 of the connecting member 1300 to gradually disengage from the first thread 100 of the mounting base 1100. Specifically, in the event of an emergency (e.g., a vehicle collision preventing the doors from opening, or a vehicle falling into water requiring emergency escape), the occupants of the vehicle first grasp the connecting member 1300 of the armrest device 1000 and rotate it in the loosening direction, causing the second thread 200 of the connecting member 1300 to gradually disengage from the first thread 100 of the mounting base 1100. In embodiments where the armrest device 1000 includes a connecting member 1300 at each end (i.e., a first connecting member 1310 and a second connecting member 1320), the operator preferably grasps the first connecting member 1310 and the second connecting member 1320 at both ends of the device body with both hands, and simultaneously rotates the two connecting members in the same rotation direction (e.g., both rotating counterclockwise or clockwise), causing the threaded connection at both ends to gradually disengage synchronously.

[0049] In step S200, after the second thread 200 is completely separated from the first thread 100, the device body 1200, together with the connector 1300, is removed from the mounting base 1100, thereby enabling the window-breaking operation of the vehicle 2000's window glass 2002 to be performed using the window-breaking hammer 1210 integrated in the device body 1200. Specifically, the operator continues to rotate until the second thread 200 of the connector 1300 is completely separated from the first thread 100 of the mounting base 1100, as shown in the image. Figure 5 and Figure 7 As shown. At this time, the device body 1200 is no longer constrained by the mounting base 1100, and the operator can remove the device body 1200 together with the connector 1300 from the mounting base 1100. When the device body 1200 is composed of a window-breaking hammer 1210 and a separate section 1220, the longitudinal constraints at both ends of the device body 1200 disappear after it is separated from the mounting base 1100, and the operator can separate and remove the window-breaking hammer 1210 from the separate section 1220. Next, the operator can hold the window-breaking hammer 1210 (for example, hold the part of the body covered by its plastic coating and point the hard tip toward the window glass) and forcefully strike the window glass 2002 of the vehicle 2000. The concentrated impact force of the hard tip will cause the tempered glass of the window to break, thus performing the window-breaking operation. Figure 8 As shown. After the car window glass shatters in 2002, the occupants can escape the vehicle or seek rescue through the broken window opening.

[0050] Therefore, the entire operation of Method 3000 is simple and requires no tools. Even ordinary passengers without special training can quickly and correctly execute it in an emergency, ensuring the safety of passengers in the vehicle.

[0051] Figure 10 A schematic flowchart illustrating a method 3000 for using the handrail device 1000 according to an embodiment of the present invention is shown. Figure 10 As shown, the method 3000 also includes step S300.

[0052] In step S300, the window-breaking hammer 1210 is reassembled to form the device body 1200, and the second thread 200 is re-engaged with the first thread 100 by rotating the connector 1300 in the opposite direction to step S100, so that the device body 1200 together with the connector 1300 is reinstalled to the mounting base 1100, thereby restoring the daily handrail function of the handrail device 1000. Specifically, for example, after the window-breaking operation is completed and the relevant personnel have been safely evacuated or the rescue is completed, if it is necessary to restore the handrail device 1000 to its original handrail use state (for example, the vehicle needs to be put back into use after maintenance, or in some cases when the window-breaking operation is only used for drills or tests), the operator can first re-align and reassemble the previously separated window-breaking hammer 1210 and the split section 1220 to form a complete device body 1200 again, especially to safely hide the hard tip of the window-breaking hammer 1210 in the corresponding recess inside the split section 1220. The operator then lifts the assembled device body 1200, aligning the connectors 1300 at both ends with the mounting base 1100 on the roof. Next, by rotating the connectors 1300 in the opposite direction to step S100 (e.g., clockwise if disassembly was counterclockwise), the second thread 200 of the connectors 1300 re-engages with the first thread 100 on the mounting base 1100. As rotation continues, the threads tighten, ultimately securing the device body 1200 and connectors 1300 back onto the mounting base 1100. At this point, the armrest device 1000 has fully regained its mechanical strength and appearance as a roof armrest, thus restoring its everyday armrest function.

[0053] The above-mentioned reversible recovery step design not only solves the safety hazard of traditional vehicle window breakers being accidentally dislodged due to accidental contact, but also greatly improves the product's economy and environmental friendliness, avoids the waste caused by single use, and ensures that occupants can practice disassembly and assembly at any time without psychological burden, so that they can complete the disassembly operation more calmly in real crisis moments, and buy precious escape time to save lives.

[0054] Although specific embodiments of the invention have been described in detail herein, they are given for illustrative purposes only and should not be construed as limiting the scope of the invention. Various substitutions, alterations, and modifications can be conceived without departing from the spirit and scope of the invention.

Claims

1. A handrail device (1000) for a vehicle (2000), wherein, The handrail device (1000) includes: At least one mounting base (1100) configured to be fixedly mounted to the roof (2001) of the vehicle (2000), the mounting base (1100) having a first thread (100) at one end away from the roof (2001). Device body (1200), wherein the device body (1200) integrates a window-breaking hammer (1210); and At least one connector (1300) is rotatably connected to the device body (1200), the connector (1300) having a second thread (200) that mates with the first thread (100), the connector (1300) being configured to mount the device body (1200) to the mounting base (1100 via the connector (1300) when the second thread (200) engages with the first thread (100), thereby forming a handrail for the occupants of the vehicle (2000) to grip. By rotating the connector (1300), the second thread (200) is disengaged from the first thread (100), and the device body (1200) together with the connector (1300) is separated from the mounting base (1100), thereby allowing the occupants of the vehicle (2000) to use the window-breaking hammer (1210) to break a window.

2. The handrail device (1000) according to claim 1, wherein, The first thread (100) is configured as an external thread on the outer circumferential surface of the mounting base (1100), and the second thread (200) is configured as an internal thread on the inner circumferential surface of the connector (1300); and / or The connector (1300) and the device body (1200) are connected by a nested fitting structure (1400) to achieve circumferential rotation around the corresponding axes (10, 20) and axial limiting along the corresponding axes (10, 20); and / or The device body (1200) is composed of the window-breaking hammer (1210) and a separate segment (1220) that is shaped to fit the window-breaking hammer (1210) along the longitudinal direction of the device body (1200); and / or The at least one mounting base (1100) includes a first mounting base (1110) and a second mounting base (1120) that are independent of each other. The at least one connector (1300) includes a first connector (1310) adapted to be threadedly engaged with the first mounting base (1110) and a second connector (1320) adapted to be threadedly engaged with the second mounting base (1120). The first connector (1310) and the second connector (1320) are respectively located at both ends of the device body (1200).

3. The handrail device (1000) according to claim 2, wherein, The window-breaking hammer (1210) has a first hammer end (1211) and a second hammer end (1212). The first connector (1310) is located at the first hammer end (1211) and is rotatably engaged with the first hammer end (1211). The split section (1220) has a first section end (1221) and a second section end (1222). The second connector (1320) is located at the first section end (1221) and is rotatably engaged with the first section end (1221). The second hammer end (1212) and the second section end (1222) are connected as one unit by complementary external contours in the assembled state of the handrail device (1000), and the connection is maintained when the second thread (200) engages with the first thread (100), thereby constraining both ends of the device body (1200) to the corresponding mounting base (1100); and / or The nested mating structure (1400) includes a radially narrowed annular groove (1410) on the outer periphery of the end of the device body (1200) and a radially inwardly protruding annular flange (1420) on the inner periphery of the connector (1300). The annular flange (1420) is embedded in the annular groove (1410), so that the connector (1300) can rotate continuously around the corresponding axis (10, 20) while being unable to disengage relative to the device body (1200) in the direction along the corresponding axis (10, 20).

4. The handrail device (1000) according to claim 3, wherein, The first mounting base (1110), the first connector (1310), and the end of the first hammer (1211) constitute a first connecting assembly; the second mounting base (1120), the second connector (1320), and the end of the first segment (1221) constitute a second connecting assembly; the first connecting assembly and the second connecting assembly are symmetrical about the vertical center plane (1001) of the handrail device (1000); and / or The inner diameter of the annular flange (1420) is smaller than the outer diameter of the annular groove (1410) on both axial end faces, thereby forming an axial constraint on the connector (1300); and / or The end of the second hammer (1212) is constructed as a hard tip capable of shattering the car window glass.

5. The handrail device (1000) according to claim 4, wherein, The hard tip is made of a hard metal material; and / or The end of the second segment (1222) is configured to accommodate the recess of the rigid tip in the assembled state; and / or The first thread (100) of the first mounting base (1110) and the first thread (100) of the second mounting base (1120) have the same thread direction, so that when the device body (1200) is separated from the mounting base (1100), the operator can simultaneously rotate the first connector (1310) and the second connector (1320) in the same rotation direction so that the threaded connections at both ends of the device body (1200) are disengaged synchronously.

6. The handrail device (1000) according to claim 5, wherein, In the assembled state of the handrail device (1000), the rigid tip is embedded in the recess to have a predetermined overlap length along the longitudinal direction of the device body (1200). The predetermined overlap length is set to meet the structural strength requirements of the device body (1200) as a handrail when it is subjected to occupant gripping and pulling in normal use.

7. The handrail device (1000) according to any one of claims 1 to 6, wherein, The mounting base (1100) and the connector (1300) are made of plastic material; and / or The window-breaking hammer (1210) includes a core made of metal and a plastic covering layer covering the core, wherein the plastic covering layer is integrally formed with the core by injection molding; and / or The handrail device (1000) is configured such that, after the device body (1200) is separated from the mounting base (1100), the second thread (200) can be re-engaged with the first thread (100) by rotating the connector (1300) in the opposite direction, thereby reinstalling the device body (1200) onto the mounting base (1100) to restore the daily handrail function of the handrail device (1000).

8. A vehicle (2000), wherein, The vehicle (2000) includes a roof (2001), a window glass (2002), and at least one handrail device (1000) according to any one of claims 1 to 7, wherein a mounting base (1100) of the handrail device (1000) is fixedly mounted on the roof (2001), and a window-breaking hammer (1210) of the handrail device (1000) is configured to break the window glass (2002) after being separated from the mounting base (1100).

9. A method of using the handrail device (1000) according to any one of claims 1 to 7 (3000), wherein, The method of use (3000) includes the following steps: S100: Rotate the connector (1300) of the handrail device (1000) so that the second thread (200) of the connector (1300) gradually disengages from the first thread (100) of the mounting base (1100); S200: After the second thread (200) is completely separated from the first thread (100), the device body (1200) together with the connector (1300) is removed from the mounting base (1100), so that the window breaking operation can be performed by striking the window glass (2002) of the vehicle (2000) with the window breaking hammer (1210) integrated in the device body (1200).

10. The method of use according to claim 9 (3000), wherein, The method of use (3000) further includes the following steps: S300: The window-breaking hammer body (1210) is reassembled to form the device body (1200), and the second thread (200) is re-engaged with the first thread (100) by rotating the connector (1300) in the opposite direction to step S100, so as to reinstall the device body (1200) together with the connector (1300) onto the mounting base (1100), thereby restoring the daily handrail function of the handrail device (1000).

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