Smoke alarm

Abstract

The utility model belongs to the technical field of smoke alarm devices, and particularly provides a smoke alarm which comprises a bottom shell assembly, a top cover assembly and a circuit board provided with a switch, a containing cavity is defined by the top cover assembly and the bottom shell assembly, the circuit board is arranged in the containing cavity, and the top cover assembly comprises an inner-layer cover body, an outer-layer cover body, a fixed supporting piece and an elastic supporting piece. The outer-layer cover body comprises a fixed part and a deformation part, the fixed supporting piece is arranged between the fixed part and the inner-layer cover body and can resist the fixed part to bend towards the direction close to the inner-layer cover body after the fixed part is pressed, the deformation part is provided with a key column, and the elastic supporting piece is arranged between the deformation part and the inner-layer cover body and can resist the key column to bend towards the direction close to the inner-layer cover body. And the elastic deformation part can be elastically deformed, so that the pressed deformation part can be bent towards the direction close to the inner-layer cover body, and the key column can press the switch. According to the technical scheme, the outer-layer cover body is used as the key instead of forming a hole in the outer-layer cover body for additionally installing the key, so that the size of the key is increased, and the pressing operation of a user is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of smoke alarm devices, and in particular to a smoke alarm. Background Art

[0002] The smoke alarm generally includes a housing and a circuit board disposed in the housing. The circuit board is provided with a switch structure such as a touch switch. The housing is provided with a hole at a position corresponding to the touch switch. A button is installed in the hole. When in use, the switch structure is pressed by pressing the button to control the on and off of the circuit board, thereby controlling the operation of the smoke alarm. However, it is difficult to enlarge the button by opening a hole in the housing to install the button. The size of the hole and the button generally matches the size of the switch structure. When the smoke alarm is mounted on the ceiling, the user often needs to use a stick-like object to press the button. If the button is too small, it will be difficult for the user to align the stick-like object with the button, affecting the convenience of operation. Utility Model Content

[0003] The purpose of the present application is to provide a smoke alarm, aiming to solve the technical problem that the buttons of the smoke alarm in the prior art are too small and inconvenient for users to press.

[0004] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: a smoke alarm, including a bottom shell assembly, a top cover assembly and a circuit board provided with a switch, the top cover assembly and the bottom shell assembly are combined to form a receiving cavity, the circuit board is arranged in the receiving cavity, the top cover assembly includes an inner cover body, an outer cover body, a fixed support member and an elastic support member, the outer cover body is arranged on the side of the inner cover body facing away from the bottom shell assembly, the outer cover body includes a fixed portion and a deformation portion, the fixed support member is arranged between the fixed portion and the inner cover body, and can resist the bending of the fixed portion toward the direction close to the inner cover body after being compressed, a button column is arranged on the deformation portion, the button column passes through the inner cover body into the receiving cavity and corresponds to the switch, the elastic support member is arranged between the deformation portion and the inner cover body, and can undergo elastic deformation so that the compressed deformation portion can bend toward the direction close to the inner cover body, thereby enabling the button column to press the switch.

[0005] Furthermore, the fixing support member is arranged on the fixing portion, the inner cover body is provided with a fixing groove, and the fixing support member is inserted into the fixing groove.

[0006] Furthermore, there are multiple fixing support members, and the multiple fixing support members are distributed at intervals along the circumference of the fixing portion.

[0007] Furthermore, one of the fixed support members is a boundary support member, which is located at the boundary between the deformation portion and the fixed portion, and gaps are provided between the two ends of the boundary support member in the length direction of the boundary between the deformation portion and the fixed portion and the edge of the outer cover body.

[0008] Furthermore, a plurality of fixing support members are arranged on the fixing portion, the inner cover body is provided with a plurality of fixing grooves, and the plurality of fixing support members are plugged into the plurality of fixing grooves in a one-to-one correspondence;

[0009] The boundary support piece has an arc-shaped convex surface, and the fixing groove corresponding to the boundary support piece has an arc-shaped concave surface, and the arc-shaped convex surface matches the arc-shaped concave surface.

[0010] Furthermore, the inner cover body is provided with a through hole, the elastic support member is in sheet shape, one end of the elastic support member is fixed on the hole wall of the through hole, and the other end of the elastic support member is tilted and abuts against the deformation portion.

[0011] Furthermore, a raised end of the elastic support member is provided with an abutment protrusion having a spherical convex surface, the deformation portion is provided with an abutment groove having a spherical concave surface, the abutment protrusion is inserted into the abutment groove, and the spherical convex surface cooperates with the spherical concave surface.

[0012] Furthermore, a buckle is provided on the outer cover body, and a buckle hole is provided on the inner cover body. The buckle passes through the buckle hole and is buckled on a side of the inner cover body facing away from the outer cover body.

[0013] Furthermore, the smoke alarm further comprises a buzzer, which is mounted on a side of the fixing portion facing the inner cover.

[0014] Furthermore, an annular retaining wall is arranged at the edge of the inner cover body, and the outer cover body is arranged inside the annular retaining wall.

[0015] Compared with the prior art, the smoke alarm provided by the present application has the following beneficial effects: the top cover assembly plays the role of a "cover" on the one hand, and can be enclosed with the bottom shell assembly to form a receiving cavity; on the other hand, it plays the role of a "button", and can press the switch on the circuit board through the button column, thereby controlling the operation of the smoke alarm. Specifically, by arranging a fixed support between the fixed part of the inner cover body and the outer cover body, and arranging an elastic support between the inner cover body and the deformable part of the outer cover body, the outer cover body is stably supported, so that the outer cover body and the inner cover body are spaced apart, and space is provided for the outer cover body to bend in the direction close to the inner cover body. Since the elastic support can be elastically deformed, when the user presses the deformable part of the outer cover body, the deformable part can bend in the direction close to the inner cover body, thereby driving the button column to press the switch and realize the "button" function. The smoke alarm provided by the present application does not need to open a hole in the outer cover body to install a button separately, but uses the deformable part of the outer cover body as a button, which is conducive to increasing the size of the button, thereby facilitating the user to press the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic diagram of the structure of a smoke alarm provided in an embodiment of the present application;

[0018] Figure 2 for Figure 1 Cutaway view of a smoke alarm shown Figure 1 ;

[0019] Figure 3 for Figure 1 Cutaway view of a smoke alarm shown Figure 2 ;

[0020] Figure 4 for Figure 1 An exploded view of the smoke alarm shown;

[0021] Figure 5 for Figure 4 The schematic diagram of the structure of the outer cover shown;

[0022] Figure 6 for Figure 4 The structural schematic diagram of the inner cover body shown;

[0023] Figure 7 for Figure 4 An exploded view of the bottom housing assembly of a smoke alarm is shown.

[0024] Among them, the reference numerals in the figure are:

[0025] 10. Bottom shell assembly; 11. Middle shell; 12. Bottom plate; 13. Mounting bracket;

[0026] 20. Top cover assembly; 21. Inner cover body; 211. Key column introduction hole; 212. Fixing groove; 213. Through hole; 214. Clamp hole; 215. Annular retaining wall; 216. Positioning hole; 217. Light guide column introduction hole; 22. Outer cover body; 221. Fixing part; 222. Deformation part; 223. Spherical concave surface; 224. Mounting hole; 225. Buckle; 226. Positioning column; 227. Sound outlet hole; 23. Fixed support member; 231. Boundary support member; 24. Elastic support member; 241. Hemispherical protrusion; 25. Boundary;

[0027] 30. Circuit board; 40. Switch; 50. Accommodation cavity; 60. Key column; 70. Buzzer; 80. Light guide column. DETAILED DESCRIPTION

[0028] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0029] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] Please also read Figures 1 to 4The embodiment of the present application provides a smoke alarm, including a bottom shell component 10, a top cover component 20 and a circuit board 30 provided with a switch 40, the top cover component 20 and the bottom shell component 10 enclose a receiving cavity 50, the circuit board 30 is arranged in the receiving cavity 50, the top cover component 20 includes an inner cover body 21, an outer cover body 22, a fixed support member 23 and an elastic support member 24, the outer cover body 22 is arranged on the side of the inner cover body 21 facing away from the bottom shell component 10, the outer cover body 22 includes a fixed portion 221 and a deformation portion 222, the fixed support member 23 and an elastic support member 24 The support member 23 is arranged between the fixed portion 221 and the inner cover body 21, and can resist the bending of the fixed portion 221 toward the direction close to the inner cover body 21 after being compressed. A button column 60 is arranged on the deformation portion 222, and the button column 60 passes through the inner cover body 21 into the accommodating cavity 50 and corresponds to the switch 40. The elastic support member 24 is arranged between the deformation portion 222 and the inner cover body 21, and can undergo elastic deformation so that the compressed deformation portion 222 can bend toward the direction close to the inner cover body 21, thereby driving the button column 60 to press the switch 40.

[0033] On the one hand, the top cover assembly 20 plays the role of a "sealing cover" and can be enclosed with the bottom shell assembly 10 to form a receiving cavity 50. On the other hand, it plays the role of a "button" and can press the switch 40 on the circuit board 30 through the button column 60, thereby controlling the operation of the smoke alarm. Specifically, a fixed support member 23 is provided between the fixed portion 221 of the inner cover body 21 and the outer cover body 22, and an elastic support member 24 is provided between the inner cover body 21 and the deformable portion 222 of the outer cover body 22 to stably support the outer cover body 22, so that the outer cover body 22 is spaced apart from the inner cover body 21, providing space for the outer cover body 22 to bend toward the direction close to the inner cover body 21. Since the elastic support member 24 can undergo elastic deformation, when the user presses the deformable portion 222 of the outer cover body 22, the deformable portion 222 can bend toward the direction close to the inner cover body 21, thereby driving the button column 60 to press the switch 40, thereby realizing the "button" function. The smoke alarm provided in the present application does not need to open a hole in the outer cover 22 to install another button. Instead, the deformable portion 222 of the outer cover 22 is used as a button, which is beneficial to increase the size of the button, thereby facilitating the user to press and operate.

[0034] Specifically, the switch 40 on the circuit board 30 may be a touch switch 40 , a membrane switch 40 , etc., which is not limited thereto.

[0035] Specifically, Figure 6 As shown, the inner cover 21 is provided with a button column introduction hole 211 , and the button column 60 passes through the button column introduction hole 211 and extends into the receiving cavity 50 .

[0036] In one embodiment, in combination Figure 5 and Figure 6As shown, the fixing support member 23 is arranged on the fixing portion 221, and the inner layer cover 21 is provided with a fixing groove 212, and the fixing support member 23 is inserted into the fixing groove 212. Through the plug-in cooperation between the fixing groove 212 and the fixing support member 23, it can not only play a supporting role for the fixing portion 221, but also play a positioning role between the outer layer cover 22 and the inner layer cover 21, so as to avoid relative slippage between the outer layer cover 22 and the inner layer cover 21. In addition, compared with setting the fixing groove 212 on the fixing portion 221 and fixing the fixing support member 23 on the inner layer cover 21, by setting the fixing groove 212 on the inner layer cover 21 and setting the fixing support member 23 on the outer layer cover 22, there is no need to groove the outer layer cover 22, which is conducive to reducing the thickness of the outer layer cover 22, so that the deformation portion 222 is easier to bend and deform, and the pressing feel is improved.

[0037] In one embodiment, Figure 5 As shown, the number of fixed supports 23 is multiple, and the multiple fixed supports 23 are distributed at intervals along the circumference of the fixed portion 221. By providing multiple fixed supports 23, and the multiple fixed supports 23 are distributed at intervals along the circumference of the fixed portion 221, the stability can be improved, and it is ensured that the fixed portion 221 will not bend in the direction close to the inner cover body 21 after being compressed. When designing, the positions of each fixed support 23 can be arranged according to actual needs. The more dispersed the fixed supports 23 are distributed, the larger the range of the fixed portion 221 is, and the smaller the range of the deformation portion 222 is. On the contrary, the more concentrated the fixed supports 23 are distributed, the smaller the range of the fixed portion 221 is, and the larger the range of the deformation portion 222 is, so as to achieve the purpose of controlling the range of the deformation portion 222. Specifically, the number of fixed slots 212 is consistent with the number of fixed supports 23, and multiple fixed supports 23 are plugged into multiple fixed slots 212 in a one-to-one correspondence.

[0038] In one embodiment, Figure 5As shown, one of the fixed support members 23 is a boundary support member 231, and the boundary support member 231 is located at the boundary 25 between the deformation portion 222 and the fixed portion 221. Gaps are provided between the boundary support member 231 and the edge of the outer layer cover 22 at both ends in the length direction of the boundary 25 between the deformation portion 222 and the fixed portion 221. For the convenience of explanation, the following explanation is given by taking the outer layer cover 22 as a circular shape, and the boundary 25 between the fixed portion 221 and the deformation portion 222 as an example, at this time, the fixed portion 221 and the deformation portion 222 are both semicircular, and the outer contour of the deformation portion 222 is composed of a straight line and a semicircular arc, wherein the straight line is the boundary 25 between the deformation portion 222 and the fixed portion 221, and when the boundary support member 231 completely covers the boundary 25 between the fixed portion 221 and the deformation portion 222, it is aligned with the middle position of the semicircular arc of the deformation portion 222. Compared with the conventional embodiment, the two ends of the semicircular arc of the deformation part 222 are closer to the boundary support 231, which will make it difficult for the two ends of the semicircular arc of the deformation part 222 to bend and deform. In this embodiment, by leaving a gap between the two ends of the boundary support 231 and the edge of the outer cover 22, the distance between the two ends of the semicircular arc of the deformation part 222 and the boundary support 231 can be increased, thereby enhancing the bending deformation ability of the two ends of the semicircular arc of the deformation part 222, so that the user can press the two ends of the semicircular arc of the deformation part 222 more easily and labor-saving. Specifically, the length of the boundary support 231 can be one-third or less than one-third of the length of the boundary 25 between the fixed part 221 and the deformation part 222, and the distance between the two ends of the boundary support 231 and the edge of the outer cover 22 is equal, so that a better pressing feel can be obtained. Of course, in some other embodiments, the shape of the outer cover 22 can also be square, rectangular, etc.

[0039] In one embodiment, the boundary support member 231 has an arcuate convex surface, and the fixing groove 212 corresponding to the boundary support member 231 has an arcuate concave surface, and the arcuate convex surface cooperates with the arcuate concave surface. When the user presses the deformable portion 222 to bend the deformable portion 222 toward the direction close to the inner cover body 21, the arcuate convex surface can slide relative to the arcuate concave surface, so that the deformable portion 222 is easier to bend and deform, thereby improving the pressing feel.

[0040] Specifically, during the design, the length of the fixing groove 212 corresponding to the boundary support 231 is greater than the length of the boundary support 231 to meet the installation of boundary supports 231 of different lengths, so that the length of the boundary support 231 can be adjusted according to actual needs to obtain different pressing feel.

[0041] In one embodiment, Figure 6As shown, the inner cover body 21 is provided with a through hole 213, and the elastic support member 24 is in the form of a sheet, one end of the elastic support member 24 is fixed on the hole wall of the through hole 213, and the other end of the elastic support member 24 is tilted and abuts against the deformation part 222. When the user presses the deformation part 222, the tilted end of the elastic support member 24 can rotate around the end fixed on the hole wall of the through hole 213 under the action of pressure, so that the deformation part 222 is bent in the direction close to the inner cover body 21. When the user removes the force applied to the outer cover body 22, the elastic support member 24 can also assist the deformation part 222 to restore its original state, which is beneficial to prolonging the working life of the deformation part 222. Specifically, the number of the through holes 213 is multiple, and the multiple through holes 213 are distributed at intervals along the circumference of the deformation part 222, and each through hole 213 is connected to an elastic support member 24. Of course, in some other embodiments, the elastic support member 24 can be a compression spring, one end of the compression spring is connected to the inner cover body 21, and the other end of the compression spring is connected to the deformation part 222. When the user presses the deformation part 222, the compression spring can shrink under the action of pressure, thereby realizing that the deformation part 222 bends in the direction close to the inner cover body 21.

[0042] In one embodiment, in combination Figure 5 and Figure 6 As shown, the raised end of the elastic support member 24 is provided with a hemispherical protrusion 241, and the deformation part 222 is provided with a spherical concave surface 223, and the hemispherical protrusion 241 cooperates with the spherical concave surface 223. Through the cooperation between the hemispherical protrusion 241 and the spherical concave surface 223, not only can the deformation part 222 be supported, but also the deformation part 222 and the inner cover body 21 are positioned. In addition, when the user presses the deformation part 222 to make the elastic support member 24 elastically deformed, the hemispherical protrusion 241 can rotate in the spherical concave surface 223, so that the deformation part 222 is more easily bent and deformed, thereby improving the pressing feel.

[0043] In one embodiment, in combination Figure 5 and Figure 6As shown, the outer cover 22 is provided with a buckle 225, and the inner cover 21 is provided with a buckle hole 214. The buckle 225 passes through the buckle hole 214 and is buckled on the side of the inner cover 21 facing away from the outer cover 22. Through the cooperation of the buckle 225 and the buckle hole 214, the outer cover 22 can be fixed on the inner cover 21 to prevent the outer cover 22 from falling off. It can be understood that when the user presses the deformation part 222 of the outer cover 22, the fixed part 221 of the outer cover 22 will tend to tilt up with the boundary support member 231 as the fulcrum, but under the cooperation of the buckle 225 and the buckle hole 214, the fixed part 221 is restricted from tilting up, so that it can maintain its original state. Specifically, there are multiple buckles 225, which are distributed at intervals along the circumference of the outer cover body 22, some buckles 225 are arranged on the deformation part 222, and some buckles 225 are arranged on the fixing part 221, the number of the buckle holes 214 is consistent with the number of the buckles 225, and multiple buckles 225 correspond to each other one by one.

[0044] In one embodiment, Figure 4 As shown, the edge of the inner cover 21 is provided with an annular retaining wall 215, and the outer cover 22 is provided inside the annular retaining wall 215. By providing the annular retaining wall 215 surrounding the outer cover 22 at the edge of the inner cover 21, the gap between the inner cover 21 and the outer cover 22 can be covered, the elastic support member 24 and the fixed support member 23 are prevented from being exposed, and the aesthetics of the smoke alarm is improved.

[0045] In one embodiment, in combination Figure 5 and Figure 6 As shown, the inner cover 21 is provided with a positioning hole 216, and the outer cover 22 is provided with a positioning post 226, which is inserted into the positioning hole 216. Through the cooperation of the positioning post 226 and the positioning hole 216, the inner cover 21 and the outer cover 22 can be positioned, thereby improving the assembly efficiency.

[0046] In one embodiment, in combination Figure 4 and Figure 7 As shown, the bottom shell assembly 10 includes a middle shell 11, a bottom plate 12 and a mounting bracket 13. Both ends of the middle shell 11 are provided with openings. The top cover assembly 20 is arranged at one end opening of the middle shell 11, and the bottom plate 12 is arranged at the other end opening of the middle shell 11. The top cover assembly 20, the middle shell 11 and the bottom plate 12 are enclosed to form a receiving cavity 50, and the mounting bracket 13 is arranged on the side of the bottom plate 12 facing away from the receiving cavity 50. The smoke alarm can be fixed to objects such as ceilings and walls through the mounting bracket 13. Specifically, the inner cover body 21 in the top cover assembly 20 and the middle shell 11, and the middle shell 11 and the bottom plate 12 can be fixedly connected by screws to ensure a firm connection, the bottom plate 12 and the mounting bracket 13 can be connected by a snap-on method to facilitate disassembly and assembly, and the circuit board 30 can be fixed to the bottom plate 12 by screws.

[0047] In one embodiment, Figure 5 As shown, the smoke alarm further includes a buzzer 70, which is mounted on the side of the fixing portion 221 facing the inner cover 21. The function of the buzzer 70 is to emit an alarm sound, and since the fixing support 23 can resist the bending of the fixing portion 221 toward the inner cover 21 after being pressed, the buzzer 70 is mounted on the side of the fixing portion 221 facing the inner cover 21, which can protect the buzzer 70 and prevent the buzzer 70 from being damaged or falling off due to external force squeezing the buzzer 70.

[0048] In one embodiment, Figure 4 As shown, the fixing portion 221 is provided with a sound outlet hole 227 , and the alarm sound emitted by the buzzer 70 can be transmitted outwards through the sound outlet hole 227 .

[0049] In one embodiment, in combination Figure 5 and Figure 6 As shown, the smoke alarm further includes a light guide column 80, the deformation portion 222 is provided with a mounting hole 224, the inner cover body 21 is provided with a light guide column introduction hole 217, and the light guide column 80 is installed in the mounting hole 224 and the light guide column introduction hole 217 for transmitting light.

[0050] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A smoke alarm, characterized in that: The invention comprises a bottom shell component, a top cover component and a circuit board provided with a switch, wherein the top cover component and the bottom shell component are combined to form a receiving cavity, and the circuit board is arranged in the receiving cavity, the top cover component comprises an inner cover body, an outer cover body, a fixing support member and an elastic support member, the outer cover body is arranged on the side of the inner cover body facing away from the bottom shell component, the outer cover body comprises a fixing portion and a deformation portion, the fixing support member is arranged between the fixing portion and the inner cover body, and can resist the fixing portion from bending in a direction close to the inner cover body after being pressed, a button column is arranged on the deformation portion, the button column passes through the inner cover body into the receiving cavity and corresponds to the switch, the elastic support member is arranged between the deformation portion and the inner cover body, and can undergo elastic deformation so that the pressed deformation portion can bend in a direction close to the inner cover body, thereby enabling the button column to press the switch.

2. The smoke alarm according to claim 1, characterized in that: The fixing support member is arranged on the fixing portion, the inner cover body is provided with a fixing groove, and the fixing support member is inserted into the fixing groove.

3. The smoke alarm according to claim 1, characterized in that: There are multiple fixing support members, and the multiple fixing support members are distributed at intervals along the circumference of the fixing portion.

4. The smoke alarm according to claim 3, characterized in that: One of the fixed support members is a boundary support member, which is located at the boundary between the deformation portion and the fixed portion. Gaps are provided between both ends of the boundary between the deformation portion and the fixed portion in the length direction and the edge of the outer cover body.

5. The smoke alarm according to claim 4, characterized in that: The plurality of fixing support members are all arranged on the fixing portion, the inner cover body is provided with a plurality of fixing grooves, and the plurality of fixing support members are plugged into the plurality of fixing grooves in a one-to-one correspondence; The boundary support piece has an arc-shaped convex surface, and the fixing groove corresponding to the boundary support piece has an arc-shaped concave surface, and the arc-shaped convex surface matches the arc-shaped concave surface.

6. The smoke alarm according to claim 1, characterized in that: The inner cover body is provided with a through hole, the elastic support member is in sheet shape, one end of the elastic support member is fixed on the hole wall of the through hole, and the other end of the elastic support member is tilted and abuts against the deformation part.

7. The smoke alarm according to claim 6, characterized in that: A hemispherical protrusion is arranged at one raised end of the elastic support member, and a spherical concave surface is arranged at the deformation portion, and the hemispherical protrusion cooperates with the spherical concave surface.

8. The smoke alarm according to any one of claims 1 to 7, characterized in that: The outer cover body is provided with a buckle, and the inner cover body is provided with a buckle hole. The buckle passes through the buckle hole and is buckled on a side of the inner cover body facing away from the outer cover body.

9. The smoke alarm according to any one of claims 1 to 7, characterized in that: The smoke alarm further comprises a buzzer, which is mounted on a side of the fixing portion facing the inner cover.

10. The smoke alarm according to any one of claims 1 to 7, characterized in that: An annular retaining wall is arranged at the edge of the inner cover body, and the outer cover body is arranged inside the annular retaining wall.

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