Stainless steel door lock handle

Abstract

The utility model relates to the technical field of door lock handles, in particular to a stainless steel door lock handle which comprises a panel and a handle body installed on the panel, a sealing cover is installed at the end, away from the panel, of the handle body, a heat insulation cavity is formed in the inner wall of the handle body, and a heating assembly is arranged in the heat insulation cavity. A response cavity is formed in an inner cavity of the handle body, a response assembly is arranged in the response cavity, the heating assembly comprises aerogel and a flexible electric heating film, the cross section of the aerogel and the cross section of the flexible electric heating film are both annular, the outer wall of the aerogel is matched with the outer wall of an inner cavity of the heat insulation cavity in specification and attached to the outer wall of the inner cavity of the heat insulation cavity, and the outer wall of the flexible electric heating film is attached to the inner wall of the aerogel. According to the lever handle, the heating assembly and the response assembly can automatically start the heating function at low temperature without manual intervention, the surface temperature of the lever handle body is stabilized within a comfortable and safe range, heating can be automatically stopped after the temperature rises, and electric energy waste is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of door lock handle technology, specifically a stainless steel door lock handle. Background Technology

[0002] Door lock handles are manual operating components in door lock systems used to control the opening and closing of the lock body and assist in opening and closing the door. They also have decorative and protective functions and are widely used in doors of various buildings such as homes, hotels, and office buildings. Their core function is to drive the transmission structure inside the lock body to move by manually turning or pressing, thereby realizing the extension and retraction of the bolt and thus completing the opening or locking of the door. Door lock handles are a key component that balances the practicality of door locks and the spatial decoration, directly affecting the user experience and the overall aesthetics of the door.

[0003] Outdoor environments are subject to drastic temperature and humidity changes, numerous corrosive media, and frequent physical impacts. Ordinary materials are prone to rust, deformation, or damage, failing to meet usage requirements. Stainless steel door lock handles, on the other hand, can form a dense chromium oxide passivation film on their surface, exhibiting strong corrosion resistance. These characteristics precisely address the pain points of outdoor scenarios, ensuring long-term stable and reliable use.

[0004] In winter, outdoor temperatures in northern regions often drop to -10℃ to -25℃. Traditional stainless steel door lock handles lack automatic heating functions, and their surface temperature easily drops below 0℃ with the environment. Users not only experience intense coldness and discomfort when holding them, but also risk frostbite, severely impacting ease of operation. If a heating function is added to a traditional door lock handle, it usually uses a manual switch or a continuous power-on mode. The manual switch requires users to operate it in low-temperature environments, resulting in a poor user experience. While continuous power-on can maintain the temperature, long-term operation will result in a large waste of electricity. Therefore, a stainless steel door lock handle is proposed to address the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a stainless steel door lock handle to solve the problems mentioned in the background art.

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

[0007] A stainless steel door lock handle includes a panel and a handle body mounted on the panel. A sealing cap is installed at the end of the handle body away from the panel. A heat insulation cavity is formed in the inner wall of the handle body, and a heating component is disposed within the heat insulation cavity. A response cavity is formed in the inner cavity of the handle body, and a response component is disposed within the response cavity. The heating component includes an aerogel and a flexible electric heating film. Both the aerogel and the flexible electric heating film have annular cross-sectional shapes. The outer wall of the aerogel is adapted to and fits the outer wall of the inner cavity of the heat insulation cavity. The outer wall of the flexible electric heating film fits the inner wall of the aerogel. The inner wall of the flexible electric heating film is adapted to and fits the inner wall of the inner cavity of the heat insulation cavity. The heat insulation cavity is annular and coaxially arranged with the handle body.

[0008] As a further optimization of this utility model, the response component includes a heat-conducting copper tube disposed inside the response cavity. One end of the heat-conducting copper tube is flush with the end of the handle body away from the panel, and the other end of the heat-conducting copper tube is spaced apart from one end of the inner end face of the response cavity.

[0009] As a further optimization of this utility model, the heat-conducting copper tube is hollow inside, and a movable stopper plate is provided on the side of the inner cavity of the heat-conducting copper tube near the panel. There is a gap between the movable stopper plate and the inner end face of the heat-conducting copper tube near the panel, and the outer side of the movable stopper plate is in contact with the inner wall of the heat-conducting copper tube.

[0010] As a further optimization of this utility model, water is filled between the movable plug plate and the inner end face of the heat-conducting copper pipe near the sealing cap, and the water fills the space between the movable plug plate and the inner end face of the heat-conducting copper pipe.

[0011] As a further optimization of this utility model, a movable support rod is fixedly connected to the side of the movable plug plate away from the water, and the end of the movable support rod away from the movable plug plate passes through the heat-conducting copper pipe and extends into the response cavity.

[0012] As a further optimization of this utility model, the extension end of the movable support rod is fixedly connected to a trigger block, and the inner end face of the response cavity near the trigger block is fixedly connected to a trigger switch. The trigger switch corresponds to the position of the trigger block, and a gap is left between the trigger switch and the trigger block.

[0013] As a further optimization of this utility model, a return spring is sleeved on the outer side of the movable support rod. One end of the return spring is fixedly connected to the trigger block, and the other end of the return spring is fixedly connected to the outer end face of the heat-conducting copper tube.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this invention, the heating and response components enable adaptive temperature control without manual intervention. The heating function can be automatically activated at low temperatures to stabilize the surface temperature of the handle body within a comfortable and safe range, avoiding the cold discomfort and risk of frostbite when the user holds it, and ensuring ease of operation. At the same time, it does not require continuous power supply and will automatically stop heating after the temperature rises, effectively reducing energy waste and balancing the low-temperature user experience with energy-saving requirements. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 A cross-sectional view of the handle body of this utility model. Figure 1 ;

[0018] Figure 3 A cross-sectional view of the handle body of this utility model. Figure 2 ;

[0019] Figure 4 This utility model Figure 2 Enlarged view of point A;

[0020] Figure 5 This utility model Figure 3 Enlarged view of point B;

[0021] Figure 6 This is a cross-sectional view of the heat-conducting copper tube of this utility model.

[0022] In the diagram: 1. Panel; 2. Handle body; 21. Insulated cavity; 22. Heating component; 221. Aerogel; 222. Flexible electric heating film; 23. Response cavity; 24. Response component; 241. Thermally conductive copper pipe; 242. Movable stopper plate; 243. Movable support rod; 244. Trigger block; 245. Trigger switch; 246. Return spring; 3. Sealing cover. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] Please see Figure 1 Figure 6 This utility model provides a technical solution:

[0026] A stainless steel door lock handle includes a panel 1 and a handle body 2 mounted on the panel 1. A sealing cover 3 is installed at the end of the handle body 2 away from the panel 1. A heat insulation cavity 21 is formed in the inner wall of the handle body 2. A heating component 22 is provided in the heat insulation cavity 21. A response cavity 23 is formed in the inner cavity of the handle body 2. A response component 24 is provided in the response cavity 23. The heating component 22 includes an aerogel 221 and a flexible electric heating film 222. The cross-sectional shape of both the aerogel 221 and the flexible electric heating film 222 is annular. The outer wall of the aerogel 221 is adapted to and fits the outer wall of the inner cavity of the heat insulation cavity 21. The outer wall of the flexible electric heating film 222 is fitted to the inner wall of the aerogel 221. The inner wall of the flexible electric heating film 222 is adapted to and fits the inner wall of the inner cavity of the heat insulation cavity 21. The heat insulation cavity 21 is annular and coaxial with the handle body 2.

[0027] It should be noted that: Panel 1 (made of stainless steel) serves as the mounting base for the handle body 2 and is fixed to the door body with bolts to ensure the stable installation of the handle body 2. The handle body 2 is for users to hold and operate. The end away from the panel 1 is fitted with a sealing cover 3 by threads or clips to prevent dust and rainwater from entering the internal cavity of the handle and affecting the operation of the components.

[0028] Furthermore: the heat insulation cavity 21, as the core functional cavity, has a ring-shaped design (its depth matches the length of the handle body 2) and is coaxial with the handle body 2, ensuring uniform heat insulation and heating effects throughout the circumference. The aerogel 221 of the heating component 22 and the flexible electric heating film 222 form a "heat insulation and heating" double-layer structure. The aerogel 221 adheres to the outer wall of the heat insulation cavity 21, which can block a certain amount of external temperature transmission and prevent the flexible electric heating film 222 from rapidly dissipating heat after heating. The flexible electric heating film 222 is sandwiched between the aerogel 221 and the inner wall of the heat insulation cavity 21, and can be energized and heated at low temperatures, ensuring user comfort and smooth operation. The response component 24 in the response cavity 23 is responsible for monitoring changes in external temperature and realizing the automatic start and stop of the heating component 22, avoiding manual intervention and realizing automatic heating or shutdown.

[0029] As a further implementation of this solution, the response component 24 includes a heat-conducting copper pipe 241 disposed inside the response cavity 23. One end of the heat-conducting copper pipe 241 is flush with the end of the handle body 2 away from the panel 1, and the other end of the heat-conducting copper pipe 241 is spaced from one end of the inner end face of the response cavity 23.

[0030] It should be noted that the thermally conductive copper tube 241 (made of copper) has excellent thermal conductivity, which can quickly capture external temperature fluctuations and ensure that the internal water can change state (liquid to solid) in a timely manner with temperature changes, avoiding response lag. The other end of the thermally conductive copper tube 241 is separated from the inner end face of the response cavity 23. The reserved gap provides space for the subsequent movement of the movable support rod 243, avoids structural interference, and ensures smooth operation of each component of the response component 24. In addition, the hollow design of the thermally conductive copper tube 241 can accommodate water and the movable plug plate 242, providing a carrier for the "temperature mechanical action conversion" and realizing the connection from "temperature sensing" to "component triggering".

[0031] As a further implementation of this solution, the heat-conducting copper tube 241 is hollow inside. A movable plug plate 242 is provided on the side of the inner cavity of the heat-conducting copper tube 241 near the panel 1. There is a gap between the movable plug plate 242 and the inner end face of the heat-conducting copper tube 241 near the panel 1, and the outer side of the movable plug plate 242 is in contact with the inner wall of the heat-conducting copper tube 241.

[0032] It should be noted that the outer side of the movable stopper 242 is tightly fitted to the inner wall of the heat-conducting copper pipe 241, allowing it to slide smoothly axially within the inner cavity of the heat-conducting copper pipe 241. This prevents water leakage from gaps and reduces sliding friction (ensuring that the movable stopper 242 can be easily moved when the water freezes and expands, resulting in high sensitivity). The distance between the movable stopper 242 and the inner end face of the heat-conducting copper pipe 241 near the panel 1 provides sufficient travel for the movable stopper 242. When the water inside the heat-conducting copper pipe 241 changes from a liquid to a solid state, its volume expands. Approximately 9%, after expansion, it can push the movable stopper plate 242 to move. This gap can fully accommodate the movement stroke of the movable stopper plate 242, ensuring that the subsequent trigger block 244 and trigger switch 245 can be effectively triggered. At the same time, this gap also provides space for the extension and retraction of the reset spring 246. When the temperature rises and the ice melts into water (the volume returns to its initial state), the reset spring 246 can push the movable stopper plate 242 back to its initial position, avoiding the movable stopper plate 242 from being stuck due to the shrinkage of the water volume, and realizing the reuse of the response component 24.

[0033] As a further implementation of this solution, water is filled between the movable plug plate 242 and the inner end face of the heat-conducting copper pipe 241 near the sealing cover 3. The water fills the space between the movable plug plate 242 and the inner end face of the heat-conducting copper pipe 241. A movable support rod 243 is fixedly connected to the side of the movable plug plate 242 away from the water. The end of the movable support rod 243 away from the movable plug plate 242 passes through the heat-conducting copper pipe 241 and extends into the response cavity 23.

[0034] It should be noted that: water must completely fill the space between the movable stopper plate 242 and the end of the heat-conducting copper pipe 241 near the sealing cover 3. Its phase change logic and temperature response are precisely matched. When the external temperature drops below 0°C, the heat-conducting copper pipe 241 quickly conducts the low temperature to the interior, and the water gradually changes from liquid to solid, expanding in volume by about 9%, generating a stable thrust that pushes the movable stopper plate 242 towards the panel 1. When the heating component 22 is activated and heats the handle body 2, the temperature rises back to above 0°C, the ice melts into water, the volume returns to its initial state, the thrust disappears, creating conditions for the subsequent reset spring 246 to push the stopper plate back.

[0035] Furthermore, the movable support rod 243 is fixed to the movable plug plate 242 by welding or threading, and moves synchronously with the movable plug plate 242. One end of the rod extends through the heat-conducting copper pipe 241 into the response chamber 23, which can accurately transmit the linear movement of the movable plug plate 242 to the trigger block 244, realizing the complete link of "external temperature decrease - water freezing and expansion - movable plug plate 242 movement - movable support rod 243 transmission - trigger heating". In addition, sealing rings need to be set between the movable plug plate 242 and the heat-conducting copper pipe 241 and at the penetration point between the movable support rod 243 and the heat-conducting copper pipe 241 to prevent water from leaking from the gaps and penetration points, avoid the reduction of water volume inside the heat-conducting copper pipe 241, and ensure the long-term stable operation of the response component 24.

[0036] As a further implementation of this solution, a trigger block 244 is fixedly connected to the extended end of the movable support rod 243, and a trigger switch 245 is fixedly connected to the inner end face of the response cavity 23 near the trigger block 244. The trigger switch 245 corresponds to the position of the trigger block 244, and a gap is left between the trigger switch 245 and the trigger block 244.

[0037] It should be noted that: the trigger block 244 is fixed to the end of the movable support rod 243 and moves synchronously with the movable support rod 243. Its position corresponds to the trigger switch 245 (micro switch or limit switch), ensuring that when water freezes and pushes the movable stopper plate 242 to move, the trigger block 244 can accurately contact the trigger switch 245. The gap between the trigger switch 245 and the trigger block 244 needs to be precisely designed based on the amount of water expansion when it freezes. When water freezes and pushes the movable stopper plate 242 to move, the trigger block 244 moves synchronously. This gap ensures that the trigger block 244 can just press the trigger switch 245, thus energizing the heating component 22. If the gap is too large, the amount of water expansion when it freezes will be insufficient, and the trigger block 244 will not be able to contact the trigger switch. 245. If the gap is too small, the heating component 22 will not be able to start. If the gap is too small, the trigger block 244 may accidentally trigger the trigger switch 245 due to vibration or shaking of the handle body 2 before the temperature reaches 0℃ (water has not frozen), resulting in wasted power (such as accidental start of heating when the temperature is above 10℃ in spring and autumn). The trigger switch 245 is electrically connected to the heating component 22 through a heat-resistant insulated wire. When the trigger block 244 presses the trigger switch 245, the switch is closed, and the flexible electric heating film 222 is energized and heated. When the temperature rises above 0℃, the ice melts into water, the reset spring 246 pushes the trigger block 244 away from the trigger switch 245, the switch is opened, and the heating component 22 stops working, realizing adaptive temperature control based on water phase change.

[0038] As a further implementation of this solution, a reset spring 246 is sleeved on the outer side of the movable support rod 243. One end of the reset spring 246 is fixedly connected to the trigger block 244, and the other end of the reset spring 246 is fixedly connected to the outer end face of the heat-conducting copper tube 241.

[0039] It should be noted that: Initially, the return spring 246 is in a slightly compressed state, generating a continuous thrust. When the external temperature decreases, the water freezes and expands, pushing the movable stopper plate 242, movable support rod 243, and trigger block 244 towards the trigger switch 245. At this time, the return spring 246 is further compressed, storing elastic potential energy. When the heating component 22 is activated, the temperature rises above 0°C, the ice melts back into water, and the volume returns to its initial state. The thrust of the water on the movable stopper plate 242 disappears, and the return spring 246 releases its elastic potential energy, pushing the trigger block 244 away from the trigger switch 245, thus moving the movable support rod 243 and movable stopper plate 246 away from the trigger switch 245. 2. Return to the initial position to ensure that the water in the heat-conducting copper pipe 241 can fully fill the space between the movable stopper plate 242 and the pipe end, preparing for the next temperature drop and water freezing and expansion. If the return spring 246 is not available, after the ice melts, the movable stopper plate 242 may be stuck due to the friction with the inner wall of the heat-conducting copper pipe 241, resulting in insufficient space for expansion when the water freezes again, making it impossible to push the movable stopper plate 242 to move, causing the trigger switch 245 to fail, and the heating component 22 to fail to start or stop. At the same time, the elasticity of the return spring 246 can compensate for the slight installation deviation of the movable support rod 243, ensuring that the trigger block 244 and the trigger switch 245 are always accurately aligned, improving the overall reliability of the device.

[0040] Workflow: When the outdoor temperature drops below 0℃ in winter (e.g., -10℃ to -25℃ in northern winters), the door lock handle is exposed to the low temperature environment. The external low temperature is transferred to the heat-conducting copper pipe 241 through the handle body 2. The heat-conducting copper pipe 241 quickly captures the low temperature and conducts heat to the water inside. The water temperature gradually drops below 0℃ and begins to freeze. The volume expansion generates a stable thrust. The expanding ice pushes the movable stopper plate 242 to slide along the inner wall of the heat-conducting copper pipe 241 towards the panel 1. The movable stopper plate 242 drives the movable support rod 243 to move synchronously. The extension end of the movable support rod 243... The trigger block 244 moves forward and gradually approaches and presses the trigger switch 245. When the trigger block 244 fully presses the trigger switch 245, the trigger switch 245 closes, the circuit is connected, the flexible electric heating film 222 is energized and heats up. After the flexible electric heating film 222 heats up, the heat is transferred to the surface through the inner wall of the handle body 2. At the same time, the aerogel 221 blocks the heat from dissipating to the outside, so that the surface temperature of the handle body 2 rises rapidly, avoiding discomfort or frostbite caused by low temperature when the user holds it. At the same time, the heat is also indirectly transferred to the response cavity 23, preparing for the subsequent melting of ice and component reset.

[0041] When the ambient temperature rises or the heating component 22 continues to work, causing the temperature of the handle body 2 to rise above 0°C, the ice in the heat-conducting copper pipe 241 begins to melt into water, and the volume gradually returns to its initial state. The water's thrust on the movable stopper plate 242 disappears. At this time, the reset spring 246 (initially in a slightly compressed state) releases its elastic potential energy, generating a thrust in the direction away from the trigger switch 245, pushing the trigger block 244 backward. The trigger block 244 drives the movable support rod 243 and the movable stopper plate 242 to return to their initial positions synchronously. The movable stopper plate 242 returns to its initial position in the heat-conducting copper pipe 241, close to the panel 1. Water refills the space between the movable stopper plate 242 and the sealing cover 3. The trigger block 244 separates from the trigger switch 245, the trigger switch 245 is turned off, and the flexible electric heating film 222 is de-energized and stops heating, thus avoiding energy waste.

[0042] If the ambient temperature drops below 0℃ again, the above "freezing-triggering-heating-melting-resetting" process will repeat, realizing adaptive temperature control of the door lock handle without manual intervention (such as manually turning on the heating switch), greatly improving the convenience of use.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stainless steel door lock handle, comprising a panel (1) and a handle body (2) mounted on the panel (1), characterized in that: A sealing cap (3) is installed at the end of the handle body (2) away from the panel (1). A heat insulation cavity (21) is provided on the inner wall of the handle body (2). A heating component (22) is provided in the heat insulation cavity (21). A response cavity (23) is provided in the inner cavity of the handle body (2). A response component (24) is provided in the response cavity (23). The heating component (22) includes an aerogel (221) and a flexible electrothermal film (222). The cross-sectional shape of both the aerogel (221) and the flexible electrothermal film (222) is annular. The outer wall of the aerogel (221) is adapted to and fitted with the outer wall of the inner cavity of the heat insulation cavity (21). The outer wall of the flexible electrothermal film (222) is fitted with the inner wall of the aerogel (221). The inner wall of the flexible electrothermal film (222) is adapted to and fitted with the inner wall of the inner cavity of the heat insulation cavity (21). The heat insulation cavity (21) is arranged in a ring shape, and the heat insulation cavity (21) is coaxial with the handle body (2).

2. A stainless steel door lock handle according to claim 1, characterized in that: The response component (24) includes a heat-conducting copper tube (241) disposed inside the response cavity (23). One end of the heat-conducting copper tube (241) is flush with the end of the handle body (2) away from the panel (1), and the other end of the heat-conducting copper tube (241) is spaced from one end of the inner end face of the response cavity (23).

3. A stainless steel door lock handle according to claim 2, characterized in that: The heat-conducting copper tube (241) is hollow inside. A movable plug plate (242) is provided on the side of the inner cavity of the heat-conducting copper tube (241) near the panel (1). There is a gap between the movable plug plate (242) and the inner end face of the heat-conducting copper tube (241) near the panel (1), and the outer side of the movable plug plate (242) is in contact with the inner wall of the heat-conducting copper tube (241).

4. A stainless steel door lock handle according to claim 3, characterized in that: Water is filled between the movable stopper plate (242) and the inner end face of the heat-conducting copper pipe (241) near the sealing cover (3). The water fills the space between the movable stopper plate (242) and the inner end face of the heat-conducting copper pipe (241).

5. A stainless steel door lock handle according to claim 3, characterized in that: The movable plug plate (242) is fixedly connected to a movable support rod (243) on the side away from the water. The end of the movable support rod (243) away from the movable plug plate (242) passes through the heat-conducting copper pipe (241) and extends into the response cavity (23).

6. A stainless steel door lock handle according to claim 5, characterized in that: The extension end of the movable support rod (243) is fixedly connected to a trigger block (244), and the inner end face of the response cavity (23) near the trigger block (244) is fixedly connected to a trigger switch (245). The trigger switch (245) corresponds to the position of the trigger block (244), and there is a gap between the trigger switch (245) and the trigger block (244).

7. A stainless steel door lock handle according to claim 6, characterized in that: A reset spring (246) is sleeved on the outside of the movable support rod (243). One end of the reset spring (246) is fixedly connected to the trigger block (244), and the other end of the reset spring (246) is fixedly connected to the outer end face of the heat-conducting copper tube (241).

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