A battery leakage prevention structure, smoke alarm and switch control system

Abstract

The present invention provides a battery leakage prevention structure, a smoke alarm, and a switch control system. The leakage prevention structure includes: a bottom shell, provided with multiple battery compartments; a first leakage prevention component, arranged in each battery compartment, which can protrude from the bottom shell surface under the action of a first elastic element; a battery cover, provided with a first air avoidance hole, which prevents the battery cover from being rotated and installed when any of the first leakage prevention components protrudes. The smoke alarm also includes a mounting bracket, a face shell, and a second leakage prevention component. When the battery cover is not installed, the second leakage prevention component protrudes and extends into the mounting bracket limit groove to prevent the mounting bracket and the face shell from being rotated and installed. A switch key is provided on the bottom shell. When the mounting bracket is successfully installed, the switch key is pressed to trigger the power on. This case has a dual power on mode: it automatically powers on in response to pressing the power on handle or detecting that the power on key is pressed for more than a preset time; when the power on key loses its pressure, it is determined to be unauthorized disassembly and an alarm is issued. The present invention ensures the correct installation and reliable operation of the smoke alarm through multiple protections.

Description

Technical Field

[0001] The present invention relates to the field of security products, and in particular to a battery leakage prevention structure, a smoke alarm and a switch control system. Background Art

[0002] Existing photoelectric smoke alarms use independent battery power, which presents the following issues during initial installation and subsequent maintenance and battery replacement: First, installers may mistakenly complete device assembly without installing the battery, or forget to install the new battery when replacing it, resulting in the device being unable to enter monitoring mode due to power outages, creating a major fire safety vulnerability. Second, traditional battery compartment designs lack a mandatory anti-false triggering mechanism, and even after correctly installing the battery, there is still a risk of the device not being activated. Third, commercially available products generally use an open battery compartment structure, which can easily cause the battery to accidentally fall out during disassembly and maintenance, exposing reliability issues such as contact oxidation and dust intrusion caused by insufficient protection. Because smoke alarms are often installed high up in public areas, existing assembly structures cannot effectively prevent theft or external impact from the device, severely weakening the system's continuous protection capabilities. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a battery leakage prevention structure, a smoke alarm and a switch control system that can prevent battery leakage, prevent forgetting to turn on the device, prevent disassembly and theft, and can well protect the battery.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A battery leakage prevention structure includes: a bottom shell, the bottom shell is provided with at least two battery compartments, and the bottom shell is provided with a clamping hole; a first leakage prevention component, each of the battery compartments is provided with a first leakage prevention component, and the first leakage prevention component is movably arranged in the corresponding battery compartment; a first elastic element, the first elastic element is used to push the first leakage prevention component so that it protrudes from the surface of the bottom shell when no battery is installed; a battery cover, the battery cover is provided with a rotating clamping portion, the rotating clamping portion can extend into the clamping hole, and the bottom shell and the battery cover are clamped together by rotating the battery cover; the battery cover is provided with a first air avoidance hole, when any of the first leakage prevention components protrudes, the first leakage prevention component conflicts with the first air avoidance hole, preventing the battery cover from rotating, and only when all battery compartments are filled with batteries and all the first leakage prevention components are pressed down can the battery cover be smoothly rotated to complete the installation.

[0006] Furthermore, a slot is provided in the battery compartment of the bottom shell, and the slot is connected to the battery compartment; the first anti-leakage fitting includes a first part and a second part, the first part is located in the battery compartment, and the second part protrudes from the surface of the bottom shell under the action of the first elastic element; when the battery is placed in the battery compartment, the battery abuts against the first part and presses down the first anti-leakage fitting, so that the second part is retracted into the bottom shell, thereby allowing the battery cover to be installed normally.

[0007] Furthermore, the first part is a horizontally extending arm; the second part is a vertically arranged column; a connecting base, the connecting base is located at the connection between the first part and the second part, and the bottom of the connecting base is provided with an installation area that cooperates with the first elastic element; a guide block, the guide block is arranged on both sides of the connecting base; a guide groove that cooperates with the guide block is provided in the bottom shell, the guide groove is arranged in a direction perpendicular to the bottom shell, and the guide block is accommodated in the guide groove for guiding the first anti-leakage component to move in the vertical direction.

[0008] Furthermore, the connecting base is a hollow cylindrical structure with a top wall and a peripheral wall and an open bottom; the second part is fixedly connected to the top wall of the connecting base; a mounting column is provided inside the connecting base, the first elastic element is a spring, and the diameter of the mounting column is slightly larger than the diameter of the spring; the spring is sleeved on the mounting column and is located in the inner cavity of the connecting base; the top wall of the connecting base abuts against the bottom shell, and the second part is pushed through the bottom shell by the spring and protrudes from the surface of the bottom shell, and the top wall of the connecting base is used to limit the upward movement distance of the first anti-leakage fitting.

[0009] Furthermore, the arm extends outward from the connecting base, and its side facing the battery is an arc-shaped contact surface, and its thickness gradually decreases from the connecting base to the outer end, forming a wedge-shaped cross-section, and the extension length of the arm exceeds 50% of the width of the battery compartment; wherein, the curvature of the arc-shaped contact surface matches the curvature of the battery bottom shell. When the battery is placed in the battery compartment, the bottom of the battery contacts the bottom of the arc-shaped contact surface, and the tangent at the contact point is a horizontal line, so that the pressure applied by the battery is converted into a vertical downward force, and the force is guided to be transmitted to the connecting base through the wedge-shaped cross-section.

[0010] Furthermore, a power-on handle is provided on the bottom shell, and a second air-avoiding hole is provided on the battery cover at a position corresponding to the power-on handle; a positioning boss is provided on the bottom shell along the connecting line between the power-on handle and the center of the circle of the bottom shell, and a third air-avoiding hole is provided on the battery cover at a position corresponding to the positioning boss; wherein, the positioning boss cooperates with the third air-avoiding hole to limit the rotational installation position of the battery cover so that the power-on handle is aligned with the second air-avoiding hole, and the positioning boss is inserted into the third air-avoiding hole to guide the correct installation of the battery cover.

[0011] Furthermore, a limiting protrusion is provided on the battery cover, and a first limiting recess is provided on the bottom shell at a position corresponding to the limiting protrusion; a slope structure is formed on the side of the first limiting recess close to the second limiting recess; wherein, the limiting protrusion, the first limiting recess and the second limiting recess cooperate to realize the segmented positioning and rotation installation of the battery cover and the bottom shell, when the battery cover is initially covered on the bottom shell, the limiting protrusion is located in the first limiting recess to form an initial positioning, and when the battery cover is rotated, the limiting protrusion slides upward along the slope and makes a circular motion to the second limiting recess, forming a final locking fit, thereby completing the installation of the battery cover.

[0012] A smoke alarm, the above-mentioned battery leakage prevention structure also includes: a mounting bracket and a face shell, the mounting bracket and the face shell being mounted by rotation; the bottom shell being arranged in a space formed by the mounting bracket and the face shell; a second leakage prevention fitting, the second leakage prevention fitting being arranged on the bottom shell; a second elastic element, the second elastic element being connected to the second leakage prevention fitting, and being used to push the second leakage prevention fitting to protrude from the surface of the bottom shell; wherein the second leakage prevention fitting coincides with a projection of the battery cover on the bottom shell, and when the battery cover is mounted on the bottom shell, the battery cover presses the second leakage prevention fitting; a plurality of limiting grooves are provided on the mounting bracket, the limiting grooves cooperate with the second leakage prevention fitting, and when the battery cover is not mounted, the second leakage prevention fitting protrudes from the bottom shell and extends into the limiting grooves, thereby preventing the mounting bracket from being rotated to be mounted to the face shell; and the mounting bracket and the face shell can complete the rotational mounting only when the battery cover is mounted and presses the second leakage prevention fitting.

[0013] Furthermore, a switch key is provided on the bottom shell, and the switch key is located at the contact position between the bottom shell and the mounting bracket; wherein, when the mounting bracket is successfully installed on the face shell, the mounting bracket presses the switch key, and the switch key is pressed to trigger the smoke alarm to turn on.

[0014] A smoke alarm switch control system comprises the above-mentioned smoke alarm; further comprising a control circuit, the control circuit being electrically connected to the power handle and the switch key, respectively; the control circuit being configured to execute dual power-on modes and an anti-theft alarm function; wherein the dual power-on modes comprise: a first power-on mode, wherein the control circuit generates a power-on signal in response to a pressing operation of the power handle, thereby putting the smoke alarm into an operating state; and a second power-on mode, wherein the control circuit automatically generates a power-on signal upon detecting that the switch key is pressed by the mounting bracket for a period exceeding a preset time threshold, thereby putting the smoke alarm into an operating state; and the anti-theft alarm function comprises: upon detecting that the switch key loses its pressing when the smoke alarm is in an operating state, the control circuit determines that the smoke alarm has been disassembled without authorization, generates an alarm signal, and disables the monitoring function of the smoke alarm.

[0015] The beneficial effects of the present invention are:

[0016] The present invention effectively solves problems that are prone to occur during use of existing smoke alarms, such as missing batteries, device failure to power on, and unauthorized disassembly. The interlocking design of the first anti-leakage assembly part and the battery cover ensures that all batteries must be correctly installed before the battery cover can be installed. The cooperation of the second anti-leakage assembly part and the mounting bracket ensures that the battery cover must be installed in place before the entire device can be installed. The dual power-on mode and anti-theft alarm function further ensure the reliable operation and safety of the device. It can be turned on by manual pressing, and it can automatically power on after correct installation. It can also promptly alarm when unauthorized disassembly is detected. This progressive security mechanism significantly improves the reliability, safety, and convenience of smoke alarms, providing users with a more reliable fire protection solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and examples.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the splitting of the present invention;

[0020] Figure 3 This is a schematic diagram of the bottom shell structure of the present invention-1;

[0021] Figure 4 This is a schematic diagram of the disassembly of the bottom shell structure of the present invention;

[0022] Figure 5 This is a schematic diagram of the bottom shell structure of the present invention-2;

[0023] Figure 6 yes Figure 5 Enlarged view of point A in the middle;

[0024] Figure 7 This is a schematic diagram of the bottom shell structure of the present invention-3;

[0025] Figure 8 1 is a schematic diagram of the three-dimensional structure of the first anti-leakage component of the present invention;

[0026] Figure 9 is a schematic cross-sectional structural diagram of the first anti-leakage component of the present invention;

[0027] Figure 10 1 is a schematic structural diagram of a battery cover according to the present invention;

[0028] Figure 11 2 is a structural diagram of the battery cover of the present invention;

[0029] Figure 12 1 is a schematic structural diagram of the mounting bracket of the present invention;

[0030] Figure 13 2 is a schematic structural diagram of the mounting bracket of the present invention;

[0031] in,

[0032] 100, bottom case; 101, battery compartment; 102, slot; 103, snap-fit ​​hole; 104, guide slot; 105, power handle; 106, positioning boss; 107, first position-limiting recess; 108, second position-limiting recess; 109, power switch; 110, first anti-leakage component; 1101, first portion; 11011, arc-shaped contact surface; 111, second portion; 112, connecting base; 1121, mounting column; 1122, top wall; 1123, peripheral wall; 1124, guide block; 113, second anti-leakage component; 114, first elastic element; 115, second elastic element.

[0033] 200, battery cover; 201, snap-fit ​​portion; 202, first air-avoiding hole; 203, second air-avoiding hole; 204, third air-avoiding hole; 205, position-limiting protrusion;

[0034] 300, mounting bracket; 301, limiting slot;

[0035] 400. Noodle shell. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the invention can be combined interactively without conflicting with each other.

[0037] The present invention proposes a battery leakage prevention structure, a smoke alarm, and a switch control system, which ensure the normal operation of the smoke alarm through multiple protection mechanisms. The technical solution and implementation of the present invention will be explained in detail below.

[0038] Reference Figure 1-7 The core of the present invention lies in the design of a set of progressive safety mechanisms, forming a complete safety chain from battery installation and battery cover 200 locking to whole machine installation and power-on control. First, the interlocking of the first anti-leakage assembly 110 and the battery cover 200 ensures that all battery compartments 101 must be loaded with batteries before the battery cover 200 can be installed. Second, the cooperation of the second anti-leakage assembly 113 and the mounting bracket 300 ensures that the battery cover 200 must be correctly installed before the whole machine can be installed. Finally, the linkage between the on / off key 109 and the control circuit realizes the automatic power-on and anti-disassembly functions.

[0039] Specifically, refer to Figure 2-4At least two battery compartments 101 are provided on the bottom shell 100, and a first anti-leakage component 110 is provided in each battery compartment 101. The anti-leakage component can move in the vertical direction under the action of the first elastic element 114. When there is no battery in the battery compartment 101, the first elastic element 114 will push the first anti-leakage component 110 to protrude from the surface of the bottom shell 100. The battery cover 200 is provided with a clamping portion 201 and a first air avoidance hole 202. When the user tries to install the battery cover 200, if there is no battery in any battery compartment 101, the corresponding first anti-leakage component 110 will conflict with the first air avoidance hole 202, preventing the battery cover 200 from rotating, thereby preventing the battery cover 200 from being installed in the absence of a battery. Only when all battery compartments 101 are loaded with batteries and all first anti-leakage members 110 are pressed can the engaging portion 201 of the battery cover 200 be inserted into the engaging hole 103 of the bottom shell 100, and the battery cover 200 can be smoothly rotated and installed. For example, when a user replaces the batteries in a smoke alarm and only inserts one battery but forgets to insert the other, when attempting to install the battery cover 200, the battery cover 200 may not be fully rotated and locked, prompting the user to check whether all batteries are correctly installed.

[0040] Further, refer to Figure 5 、 7 The present invention also provides a second anti-leakage member 113 on the bottom shell 100. Unlike the first anti-leakage member 110, the second anti-leakage member 113 is mainly used to ensure the correct installation of the battery cover 200. The second anti-leakage member 113 protrudes from the surface of the bottom shell 100 under the action of the second elastic element 115, and its position coincides with the projection of the battery cover 200 on the bottom shell 100. When the battery cover 200 is correctly installed, the second anti-leakage member 113 will be pressed and retracted. Figure 12 、 13 The mounting bracket 300 is provided with a plurality of retaining grooves 301. When the battery cover 200 is not installed, the second anti-leakage member 113 will extend into the retaining grooves 301, preventing the mounting bracket 300 from rotating with the housing 400. Only after the battery cover 200 is properly installed and the second anti-leakage member 113 is pressed, can the mounting bracket 300 be rotated with the housing 400. For example, when installing a smoke alarm, if the user forgets to install the battery cover 200 or the battery cover 200 is not properly locked, when attempting to install the smoke alarm on the mounting bracket 300, the user will find that the rotation lock cannot be completed, reminding the user to properly install the battery cover 200 first. The first elastic element 114 and the second elastic element 115 are preferably springs.

[0041] To further improve security, refer to Figure 3 、 4The present invention also provides an on / off key 109 on the bottom shell 100, which is located at the contact position between the bottom shell 100 and the mounting bracket 300. When the mounting bracket 300 is successfully installed on the top shell 400, the mounting bracket 300 will press the on / off key 109, triggering the smoke alarm to turn on. This ensures that the smoke alarm can automatically turn on after being correctly installed. At the same time, the control circuit is electrically connected to the on / off handle 105 and the on / off key 109, realizing a dual power-on mode. The first power-on mode is to manually trigger the control circuit to generate a power-on signal by pressing the on / off handle 105; the second power-on mode is when the on / off key 109 is pressed by the mounting bracket 300 and continues to exceed a preset time threshold, the control circuit automatically generates a power-on signal. For example, after the user correctly installs the smoke alarm on the mounting bracket 300 on the ceiling, even if the user forgets to press the on / off handle 105, the smoke alarm will automatically turn on and enter the working state after a few seconds, avoiding the loss of protection caused by forgetting to manually turn on the alarm.

[0042] The present invention also features an anti-theft alarm function. If the on / off switch 109 is deactivated (i.e., the mounting bracket 300 is removed) while the smoke alarm is in operation, the control circuit will detect unauthorized removal, immediately generate an alarm signal, and disable the smoke alarm's monitoring function. This effectively prevents theft or unauthorized removal of the smoke alarm. For example, if someone attempts to steal an installed smoke alarm at night, once it is removed from the mounting bracket 300, the alarm will immediately emit a high-decibel alarm, deterring the thief and alerting the homeowner that someone is attempting to steal the security device.

[0043] In some embodiments, reference Figure 4 , a slot 102 is provided in the battery compartment 101 of the bottom shell 100, and the slot 102 is connected to the battery compartment 101; Figure 8 、 9 The first anti-leakage component 110 includes a first part 1101 and a second part 111. The first part 1101 is located in the battery compartment 101, and the second part 111 protrudes from the surface of the bottom shell 100 under the action of the first elastic element 114; when the battery is placed in the battery compartment 101, the battery abuts against the first part 1101 and presses down the first anti-leakage component 110, so that the second part 111 retracts into the bottom shell 100, thereby allowing the battery cover 200 to be installed normally.

[0044] Specifically, a slot 102 is provided within the battery compartment 101 of the bottom shell 100. The slot 102 is interconnected with the battery compartment 101, providing a passage for the movement of the first anti-leakage member 110. The first anti-leakage member 110 includes a first portion 1101 located within the battery compartment 101 and a second portion 111 that can protrude from the surface of the bottom shell 100. When no battery is installed, the first elastic element 114 pushes the entire first anti-leakage member 110, causing the second portion 111 to protrude from the surface of the bottom shell 100. When a user places a battery into the battery compartment 101, the battery contacts the first portion 1101 of the first anti-leakage member 110 and generates downward pressure, causing the entire first anti-leakage member 110 to overcome the elastic force of the first elastic element 114 and move downward, thereby causing the second portion 111 to retract into the interior of the bottom shell 100 and no longer protrude from the surface of the bottom shell 100. At this point, since there is no protrusion blocking the battery cover 200, it can be installed normally and rotated to lock. When a user needs to replace the battery, if they remove the old battery and forget to insert the new one, when attempting to install the battery cover 200, because the first portion 1101 of the first anti-leakage member 110 is not pressed by the battery, the second portion 111 remains protruding due to the action of the first elastic element 114. At this time, the second portion 111 will interfere with the first escape hole 202 on the battery cover 200, preventing the user from completing the rotational installation of the battery cover 200. The user will clearly feel that the battery cover 200 cannot be smoothly rotated into place, reminding the user to check whether the battery is installed correctly.

[0045] Further, continue to refer to Figure 5 、 6 , 8, 9, the first part 1101 is a horizontally extending arm; the second part 111 is a vertically arranged column; the connecting base 112, the connecting base 112 is located at the connection between the first part 1101 and the second part 111, and the bottom of the connecting base 112 is provided with a mounting area that cooperates with the first elastic element 114; the guide block 1124, the guide block 1124 is arranged on both sides of the connecting base 112; the bottom shell 100 is provided with a guide groove 104 that cooperates with the guide block 1124, the guide groove 104 is arranged in a direction perpendicular to the bottom shell 100, and the guide block 1124 is accommodated in the guide groove 104, for guiding the first anti-leakage component 110 to move in the vertical direction.

[0046] The first portion 1101 of the first anti-leakage component 110 is a horizontally extending arm that covers a large area within the battery compartment 101, ensuring effective contact between the arm and the battery regardless of its position within the battery compartment 101. The second portion 111 is a vertically arranged column that, under the action of the first elastic element 114, protrudes through the surface of the bottom shell 100 to form a physical barrier. The connecting base 112 is located at the junction of the first portion 1101 and the second portion 111, connecting the horizontal arm and the vertical column. A mounting area is also provided at its bottom for mounting the first elastic element 114.

[0047] In order to ensure that the first anti-leakage component 110 can move smoothly in the vertical direction, refer to Figure 8 , guide blocks 1124 are provided on both sides of the connection base 112, and guide grooves 104 are provided at corresponding positions in the bottom shell 100. The guide grooves 104 are provided in a direction perpendicular to the bottom shell 100, referring to Figure 6 The guide block 1124 is just accommodated in the guide groove 104. This can effectively prevent the first leak-proof component 110 from deflecting or getting stuck during movement, ensuring that it always moves along a predetermined vertical path, thereby improving the reliability and durability of the entire leak-proof mechanism.

[0048] In practical applications, for example, when a user needs to replace the batteries in a smoke alarm, they first need to remove the battery cover 200. At this point, they can see the first anti-leakage member 110 located within the battery compartment 101. Its horizontally extending arm is located at the bottom of the battery compartment 101, while the vertical column protrudes from the surface of the bottom shell 100. When the user places the new battery into the battery compartment 101, the battery presses against the arm, causing the entire first anti-leakage member 110 to move downward. Guide blocks 1124, guided by guide slots 104, ensure a smooth descent of the device. At this point, the vertical column retracts into the interior of the bottom shell 100, no longer protruding, allowing the user to smoothly install the battery cover 200.

[0049] Further, continue to refer to Figure 8 、 9The connecting base 112 is a hollow cylindrical structure with a top wall 1122 and a peripheral wall 1123, and an open bottom; the second part 111 is fixedly connected to the top wall 1122 of the connecting base 112; a mounting column 1121 is provided inside the connecting base 112, and the first elastic element 114 is a spring, and the diameter of the mounting column 1121 is slightly larger than the diameter of the spring; the spring is sleeved on the mounting column 1121 and is located in the inner cavity of the connecting base 112; the top wall 1122 of the connecting base 112 abuts against the bottom shell 100, and the second part 111 passes through the bottom shell 100 and protrudes from the surface of the bottom shell 100 through the push of the spring, and the top wall 1122 of the connecting base 112 is used to limit the upward movement distance of the first anti-leakage fitting 110.

[0050] The second portion 111 (a vertical column) is fixedly connected to the top wall 1122 of the connecting base 112, forming a single unit, ensuring it will not loosen or fall off during operation. A mounting post 1121 is located within the connecting base 112. Its diameter is slightly larger than that of the first elastic element 114 (spring), ensuring that the spring fits securely on the post 1121 and prevents lateral displacement or detachment during operation. The spring is positioned within the inner cavity of the connecting base 112, ensuring that the spring remains vertical during compression and expansion, preventing tilting or jamming and improving the smoothness and reliability of movement.

[0051] When the system is in a static state (no battery is pressed), the top wall 1122 of the connecting base 112 abuts the bottom case 100. At this time, the second portion 111, urged by the spring, passes through the bottom case 100 and protrudes above the surface of the bottom case 100. The abutment between the top wall 1122 of the connecting base 112 and the bottom case 100 limits the upward movement of the first anti-leakage member 110, preventing it from protruding excessively and causing damage or affecting the normal use of the battery cover 200.

[0052] The hollow cylindrical structure combined with the spring offers significant advantages in assembly and maintenance. During production, workers can first insert the spring onto the mounting post 1121, then install the entire first anti-leakage assembly 110 in the corresponding position on the bottom shell 100. The entire process is simple and intuitive. If maintenance or spring replacement is required later, simply remove the first anti-leakage assembly 110 and easily replace the spring through the opening at the bottom of the connection base 112, without disassembling the entire device, greatly improving maintenance efficiency.

[0053] Further, refer to Figure 8 、 9The arm extends outward from the connecting base 112, and its side facing the battery is an arc-shaped contact surface 11011, and its thickness gradually decreases from the connecting base 112 to the outer end, forming a wedge-shaped cross-section. The extension length of the arm exceeds 50% of the width of the battery compartment 101; wherein, the curvature of the arc-shaped contact surface 11011 matches the curvature of the battery bottom shell. When the battery is placed in the battery compartment 101, the bottom of the battery contacts the bottom of the arc-shaped contact surface 11011, and the tangent at the contact point is a horizontal line, so that the pressure applied by the battery is converted into a vertical downward force, and the force is guided to be transmitted to the connecting base 112 through the wedge-shaped cross-section.

[0054] The arm extends over 50% of the width of the battery compartment 101, ensuring that the arm maintains effective contact with the battery regardless of the battery's position within the battery compartment 101. The longer arm also provides greater contact opportunities, ensuring that the detection function operates properly even if the battery is slightly misplaced.

[0055] The curvature of the arc-shaped contact surface 11011 matches the curvature of the battery bottom shell. When the battery is placed in the battery compartment 101, the bottom of the battery just contacts the bottom of the arc-shaped contact surface 11011. At this time, the tangent at the contact point is a horizontal line, so that the pressure pressing the battery is converted into vertical downward pressure, ensuring that the spring is compressed to the maximum extent.

[0056] The wedge-shaped cross-section allows vertical pressure from the battery to be transmitted to the connection base 112 along the gradient of the arm's thickness. This force transmission path prevents potential bending and deformation of the arm, enhancing the rigidity and stability of the entire mechanism. The wedge-shaped cross-section also offers self-guiding properties. When pressure is applied by the battery, the wedge-shaped structure naturally guides the vertical downward movement of the first anti-leakage member 110, further ensuring smooth and precise movement.

[0057] In some embodiments, reference Figure 3 、 4 , 10. A power-on handle 105 is provided on the bottom shell 100, and a second air-avoidance hole 203 is provided on the battery cover 200 at a position corresponding to the power-on handle 105; a positioning boss 106 is provided on the bottom shell 100 along the connecting line between the power-on handle 105 and the center of the circle of the bottom shell 100, and a third air-avoidance hole 204 is provided on the battery cover 200 at a position corresponding to the positioning boss 106; wherein, the positioning boss 106 cooperates with the third air-avoidance hole 204 to limit the rotational installation position of the battery cover 200 so that the power-on handle 105 is aligned with the second air-avoidance hole 203, and the positioning boss 106 is inserted into the third air-avoidance hole 204 to guide the correct installation of the battery cover 200.

[0058] To ensure precise positioning of the battery cover 200 during installation, a positioning stud 106 is provided on the bottom shell 100 along the line connecting the power handle 105 and the center of the bottom shell 100. This ensures that when the battery cover 200 is properly installed, the second clearance hole 203 is aligned with the power handle 105. Accordingly, a third clearance hole 204 is provided on the battery cover 200 at the position corresponding to the positioning stud 106, which is used to receive the positioning stud 106. When installing the battery cover 200, the user needs to align the third clearance hole 204 of the battery cover 200 with the positioning stud 106 on the bottom shell 100 before the battery cover 200 is fully placed.

[0059] Specifically, the second escape hole 203 is arc-shaped, and its arc length corresponds to the rotation angle required for the battery cover 200 to rotate from the initial installation position to the final locked position. When the battery cover 200 is in the initial installation position, the power-on handle 105 is located at the starting end of the arc of the second escape hole 203. As the battery cover 200 rotates, the power-on handle 105 moves relatively along the arc within the second escape hole 203 until the battery cover 200 rotates to the final locked position, at which point the power-on handle 105 is located at the ending end of the arc of the second escape hole 203. Throughout this process, the arc-shaped structure of the second escape hole 203 ensures that the power-on handle 105 is always exposed and is not blocked or restricted by the battery cover 200, ensuring that the user can conveniently operate the power-on handle 105 regardless of the rotational position of the battery cover 200.

[0060] Similarly, the third escape hole 204 is also arc-shaped, with its curvature consistent with that of the second escape hole 203, ensuring that the positioning boss 106 can move smoothly within the third escape hole 204 during the rotation of the battery cover 200. When the battery cover 200 is in the initial installation position, the positioning boss 106 is located at the starting end of the arc of the third escape hole 204; as the battery cover 200 rotates, the positioning boss 106 moves relatively along the arc trajectory within the third escape hole 204, guiding the battery cover 200 to rotate according to the predetermined path, while limiting the rotation range of the battery cover 200 to prevent damage caused by excessive rotation. When the battery cover 200 is rotated to the final locked position, the positioning boss 106 is located at the ending end of the arc of the third escape hole 204, forming a physical limit to prevent the battery cover 200 from continuing to rotate.

[0061] In some embodiments, reference Figure 3 、 4, 11. A limiting protrusion 205 is provided on the battery cover 200, and a first limiting recess 107 and a second limiting recess 108 are provided on the bottom shell 100 at a position corresponding to the limiting protrusion 205; a slope structure is formed on the side of the first limiting recess 107 close to the second limiting recess 108; wherein, the limiting protrusion 205, the first limiting recess 107 and the second limiting recess 108 cooperate to realize the segmented positioning and rotation installation of the battery cover 200 and the bottom shell 100. When the battery cover 200 is initially covered on the bottom shell 100, the limiting protrusion 205 is located in the first limiting recess 107 to form an initial positioning. When the battery cover 200 is rotated, the limiting protrusion 205 slides upward along the slope and makes a circular motion to the second limiting recess 108, forming a final locking fit, thereby completing the installation of the battery cover 200.

[0062] When the user initially places the battery cover 200 on the bottom case 100, the retaining protrusion 205 on the battery cover 200 naturally falls into the first retaining recess 107 on the bottom case 100, forming the initial position. This initial position has a slight snapping sensation, allowing the user to clearly sense that the battery cover 200 is initially in place but not yet fully locked. At this point, the engagement of the retaining protrusion 205 and the first retaining recess 107 provides sufficient friction to prevent the battery cover 200 from accidentally falling off, while not hindering the subsequent rotational locking operation.

[0063] When the user begins to rotate the battery cover 200, the stopper protrusion 205 first slides upward along the sloped structure on the side of the first stopper recess 107 near the second stopper recess 108. This sloped structure allows the stopper protrusion 205 to smoothly disengage from the first stopper recess 107, preventing sudden jerking or jamming during rotation. As the battery cover 200 continues to rotate, the stopper protrusion 205 moves in a circular motion along a predetermined trajectory until it reaches the second stopper recess 108. When the stopper protrusion 205 enters the second stopper recess 108, the user will feel a noticeable "click," indicating that the battery cover 200 has been finally locked into place and the installation process is complete.

[0064] In practical applications, for example, when a user needs to replace the batteries in a smoke alarm, they first need to rotate the battery cover 200 in the reverse direction to unlock it. At this point, the retaining protrusion 205 needs to disengage from the second retaining recess 108. Due to the tighter fit of the second retaining recess 108, the user needs to apply a certain amount of torque to overcome the locking force, thus preventing the battery cover 200 from accidentally loosening. Once the retaining protrusion 205 is free from the second retaining recess 108, the user continues to rotate in the reverse direction until the retaining protrusion 205 returns to the position of the first retaining recess 107. At this point, the battery cover 200 is in its initial position, allowing the user to easily remove the battery cover 200 and replace the batteries.

[0065] After completing the battery replacement, the user places the battery cover 200 back into the bottom case 100. At this point, it is necessary to ensure that the stopper protrusion 205 is aligned with the first stopper recess 107. At the same time, the aforementioned third clearance hole 204 also needs to be aligned with the positioning protrusion 106. Once the battery cover 200 is initially in place and the stopper protrusion 205 falls into the first stopper recess 107 to establish its initial position, the user begins to rotate the battery cover 200 clockwise. During the rotation process, the stopper protrusion 205 first slides upward along the slope, leaving the first stopper recess 107, and then moves along a circular trajectory. Simultaneously, the positioning protrusion 106 moves along an arc within the third clearance hole 204, and the power handle 105 also moves relative to the second clearance hole 203. Finally, the stopper protrusion 205 falls into the second stopper recess 108, forming a secure lock. At the same time, the positioning protrusion 106 reaches the end of the third clearance hole 204, completing the entire battery cover 200 installation process.

[0066] The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A battery leakage prevention structure, characterized in that: A bottom shell, wherein the bottom shell is provided with at least two battery compartments and a snap-in hole; An installation bracket and a face shell, wherein the installation bracket and the face shell are installed by rotation; The bottom shell is arranged in the space formed by the mounting bracket and the surface shell; A first anti-leakage component, each of the battery compartments is provided with a first anti-leakage component, and the first anti-leakage component is movably disposed in the corresponding battery compartment; a first elastic element, configured to push the first anti-leakage component so that the first anti-leakage component protrudes from the surface of the bottom shell when no battery is installed; A battery cover, wherein the battery cover is provided with a rotating clamping portion, the rotating clamping portion can extend into the clamping hole, and the bottom shell and the battery cover are clamped together by rotating the battery cover; The battery cover is provided with a first air-avoiding hole. When any of the first anti-leakage fittings protrudes, the first anti-leakage fitting will interfere with the first air-avoiding hole, preventing the battery cover from rotating. Only when all battery compartments are loaded with batteries and all the first anti-leakage fittings are pressed down, the battery cover can be smoothly rotated and installed. a second anti-leakage component, the second anti-leakage component being arranged on the bottom shell; a second elastic element connected to the second anti-leakage component and configured to push the second anti-leakage component to protrude from the surface of the bottom shell; The second anti-leakage component overlaps with the projection of the battery cover on the bottom shell, and when the battery cover is installed on the bottom shell, the battery cover presses the second anti-leakage component; The mounting bracket is provided with a plurality of limiting grooves, which cooperate with the second anti-leakage fitting. When the battery cover is not installed, the second anti-leakage fitting protrudes from the bottom shell and extends into the limiting grooves, thereby preventing the mounting bracket from being rotated with the face shell. When the battery cover is installed and the second leak-proof component is pressed, the mounting bracket and the face shell can complete the rotational installation.

2. The battery leakage prevention structure according to claim 1, characterized in that: A slot is provided in the battery compartment of the bottom shell, and the slot is connected to the battery compartment; The first anti-leakage component includes a first portion and a second portion, the first portion is located in the battery compartment, and the second portion protrudes from the surface of the bottom shell under the action of the first elastic element; When the battery is placed in the battery compartment, the battery abuts against the first portion and presses down the first anti-leakage component, causing the second portion to retract into the bottom shell, thereby allowing the battery cover to be normally installed.

3. The battery leakage prevention structure according to claim 2, characterized in that: The first part is a horizontally extending arm; The second part is a vertically arranged column; A connecting base, the connecting base is located at the connection between the first part and the second part, and a mounting area for cooperating with the first elastic element is provided at the bottom of the connecting base; Guide blocks, the guide blocks being arranged on both sides of the connection base; A guide groove cooperating with the guide block is provided in the bottom shell. The guide groove is arranged in a direction perpendicular to the bottom shell. The guide block is accommodated in the guide groove and is used to guide the first anti-leakage component to move in a vertical direction.

4. The battery leakage prevention structure according to claim 3, characterized in that: The connecting base is a hollow cylindrical structure having a top wall and a peripheral wall, and an opening at the bottom; The second portion is fixedly connected to the top wall of the connection base; A mounting post is provided inside the connection base, the first elastic element is a spring, and the diameter of the mounting post is slightly larger than the diameter of the spring; The spring is sleeved on the mounting post and located in the inner cavity of the connecting base; The top wall of the connecting base abuts against the bottom shell, and the second part passes through the bottom shell and protrudes from the bottom shell surface under the push of the spring. The top wall of the connecting base is used to limit the upward movement distance of the first anti-leakage component.

5. The battery leakage prevention structure according to claim 3, characterized in that: The arm extends outward from the connection base, and its side facing the battery is an arc-shaped contact surface, and its thickness gradually decreases from the connection base to the outer end to form a wedge-shaped cross-section. The extension length of the arm exceeds 50% of the width of the battery compartment; The curvature of the arc-shaped contact surface matches the curvature of the battery bottom shell. When the battery is placed in the battery compartment, the bottom of the battery contacts the bottom of the arc-shaped contact surface, and the tangent at the contact point is a horizontal line, so that the pressure applied by the battery is converted into a vertical downward force, and the force is guided to be transmitted to the connection base through the wedge-shaped cross-section.

6. The battery leakage prevention structure according to claim 1, characterized in that: The bottom shell is provided with a power-on handle, and the battery cover is provided with a second air-avoiding hole at a position corresponding to the power-on handle; A positioning boss is provided on the bottom shell along the connecting line between the power-on handle and the center of the bottom shell, and a third air-avoiding hole is provided on the battery cover at a position corresponding to the positioning boss; Among them, the positioning boss cooperates with the third air avoidance hole to limit the rotational installation position of the battery cover, so that the power handle is aligned with the second air avoidance hole, and the positioning boss is inserted into the third air avoidance hole to guide the correct installation of the battery cover.

7. The battery leakage prevention structure according to claim 1, characterized in that: The battery cover is provided with a limiting convex point, and the bottom shell is provided with a first limiting concave point and a second limiting concave point at positions corresponding to the limiting convex point; A slope structure is formed on a side of the first limiting concave point close to the second limiting concave point; Among them, the limiting protrusion, the first limiting concave point and the second limiting concave point cooperate to realize the segmented positioning and rotation installation of the battery cover and the bottom shell. When the battery cover is initially covered on the bottom shell, the limiting protrusion is located in the first limiting concave point to form an initial positioning. When the battery cover is rotated, the limiting protrusion slides upward along the slope and moves in a circular motion to the second limiting concave point, forming a final locking fit to complete the installation of the battery cover.

8. A smoke alarm, characterized in that: The invention comprises a battery leakage prevention structure according to any one of claims 1 to 7.

9. The smoke alarm according to claim 8, characterized in that: The bottom shell is provided with an on / off key, and the on / off key is located at a contact position between the bottom shell and the mounting bracket; When the mounting bracket is successfully mounted on the face shell, the mounting bracket presses the switch key, and the switch key is pressed to trigger the smoke alarm to turn on.

10. A smoke alarm switch control system, comprising the smoke alarm according to claim 9; characterized in that: Also includes: A power-on handle, the power-on handle being arranged on the bottom shell; A control circuit, the control circuit being electrically connected to the power handle and the power key respectively; The control circuit is used to implement dual boot mode and anti-theft alarm function; The dual boot mode includes: In a first power-on mode, the control circuit generates a power-on signal in response to a pressing operation of the power-on handle, so that the smoke alarm enters an operating state; In the second power-on mode, the control circuit automatically generates a power-on signal after detecting that the switch key is pressed by the mounting bracket for a period exceeding a preset time threshold, so that the smoke alarm enters the working state; The anti-theft alarm function includes: When the control circuit detects that the switch key loses its depression when the smoke alarm is in an operating state, it determines that the smoke alarm is disassembled without authorization, generates an alarm signal, and disables the monitoring function of the smoke alarm.

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