smoke detector

Abstract

The application discloses a smoke detector and belongs to the technical field of fire-fighting equipment. The smoke detector comprises a detector main body, a communication element, a reset element and a cover plate. The detector main body is used for being installed on a basic installation surface, and the detector main body is provided with an installation space. The communication element and the reset element are arranged in the installation space. The cover plate is detachably connected with the detector main body, and the cover plate is used for closing the installation space. The cover plate can move along the direction from the detector main body to the basic installation surface, so as to trigger the reset element. In the scheme, the installation space is arranged on the detector main body, and the communication element and the reset element are arranged in the installation space. The number of slotting on the detector main body can be reduced, and the mold opening cost of the smoke detector is reduced. Meanwhile, the cover plate can be used as a key for triggering the reset element, and the key for triggering the reset element does not need to be additionally arranged, so that the material can be saved, and the cost is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fire-fighting equipment, and particularly relates to a smoke sensor. BACKGROUND

[0002] The smoke sensor is a product for sensing smoke concentration, judging whether there is a fire hazard, and further sending an alarm to notify the hazard. The smoke sensor is widely used in offices, hotels, buildings and the like, and is a product that can well play a role in fire warning.

[0003] The smoke sensor is generally provided with a communication element (such as a SIM card) for transmitting an alarm signal and a reset element (such as a mute switch) for canceling the alarm. In the related art, the communication element is generally arranged at a position close to the rear shell of the smoke sensor, and a cover plate for covering the communication element is detachably arranged on the rear shell. The key is generally arranged at a position close to the front shell of the smoke sensor, and the front shell is provided with the key. The key is arranged opposite to the reset element, and the user can press the key to trigger the reset element. However, such an arrangement has the following problems. On the one hand, the cover plate and the key are arranged on the rear shell and the front shell respectively, which increases the materials of the smoke sensor, and further increases the assembly cost of the smoke sensor. On the other hand, when the smoke sensor is manufactured, an installation groove for fixing the cover plate needs to be formed on the rear shell, and an installation hole for installing the key needs to be formed on the front shell, which increases the mold opening cost of the smoke sensor.

[0004] Therefore, the related art has the defect that the manufacturing cost of the smoke sensor is high. CONTENT OF THE INVENTION

[0005] The purpose of the embodiments of the application is to provide a smoke sensor, which can solve the problem of high manufacturing cost of the smoke sensor in the related art.

[0006] The embodiments of the application provide a smoke sensor, which comprises:

[0007] A detector main body is arranged on a basic installation surface, and the detector main body is provided with an installation space;

[0008] A communication element and a reset element are arranged in the installation space;

[0009] A cover plate is detachably connected to the detector main body, and the cover plate is used for closing the installation space. The cover plate can move in the direction from the detector main body to the basic installation surface, so as to trigger the reset element.

[0010] In the embodiment of the present application, the mounting space is arranged on the detector main body, and the communication element and the reset element are arranged in the mounting space, the cover plate is detachably connected with the detector main body and can close the mounting space, so as to close the communication element and the reset element in the mounting space, thereby reducing the number of slots on the detector main body, and further reducing the mold opening cost of the smoke detector. At the same time, the cover plate can move along the direction from the detector main body to the base mounting surface and can trigger the reset element, so that the cover plate can be used as a key for triggering the reset element, and further no additional key for triggering the reset element is needed, thereby saving materials and reducing costs. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is an exploded view of the smoke detector disclosed by the embodiment of the present application;

[0012] Figure 2 is a bottom view of the detector main body disclosed by the embodiment of the present application;

[0013] Figure 3 is a sectional view of the smoke detector disclosed by the embodiment of the present application;

[0014] Figure 4 is an enlarged view of part A in Figure 3

[0015] Figure 5 is a partial sectional view of the smoke detector disclosed by the embodiment of the present application;

[0016] Figure 6 is a top view of the cover plate disclosed by the embodiment of the present application;

[0017] Figure 7 is a front view of the cover plate disclosed by the embodiment of the present application;

[0018] Figure 8 is a side view of the cover plate disclosed by the embodiment of the present application;

[0019] Figure 9 is a sectional view of the cover plate disclosed by the embodiment of the present application.

[0020] EXPLANATION OF REFERENCE NUMERALS:

[0021] 100 - detector main body; 110 - rear shell; 111 - first air inlet hole; 120 - front shell; 121 - second air inlet hole;

[0022] 130 - mounting space; 140 - first connecting portion; 141 - first connecting section; 142 - first clamping section;

[0023] 143 - first through hole; 150 - second connecting portion; 151 - second connecting section; 152 - second clamping section;​

[0024] 153 - second through hole; 200 - cover plate; 201 - first part; 202 - second part; 210 - first clamping portion;

[0025] 220 - second clamping portion; 230 - hook portion; 240 - avoiding slot; 250 - light guide portion; 251 - light guide hole;

[0026] 252 - through slot; 300 - communication element; 310 - mounting piece; 400 - reset element; 500 - indicator light. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0028] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be exchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a category and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0029] The smoke detector provided by the embodiments of the present application will be described in detail below in combination with the drawings, through specific embodiments and their application scenarios.

[0030] Reference Figures 1-9 The smoke detector provided by the embodiments of the present application can include a detector main body 100, a communication element 300, a reset element 400, and a cover plate 200.

[0031] The detector main body 100 can be used to be installed on a basic installation surface, where the basic installation surface can be a wall surface or a ceiling, etc. For example, Figure 1As shown, the detector main body 100 can be provided with a mounting space 130, the communication element 300 and the reset element 400 can be arranged in the mounting space 130, the cover plate 200 can be detachably connected with the detector main body 100, and the cover plate 200 can be used to close the mounting space 130, so as to close the communication element 300 and the reset element 400 in the mounting space 130. On the one hand, the communication element 300 and the reset element 400 can be protected, and on the other hand, the components in the mounting space 130 can be prevented from being exposed, thereby improving the appearance of the smoke detector.

[0032] Here, the communication element 300 and the reset element 400 are arranged in the mounting space 130, which can reduce the number of slots on the detector main body 100, thereby reducing the mold opening cost of the smoke detector.

[0033] In addition, the cover plate 200 can be moved along the direction from the detector main body 100 to the base mounting surface, so as to trigger the reset element 400. In this way, the cover plate 200 can be used as a key for triggering the reset element 400, thereby eliminating the need to additionally arrange a key for triggering the reset element 400, thereby facilitating the saving of materials and the reduction of cost.

[0034] In the embodiment of the present application, as shown in the drawings, Figure 1 The detector main body 100 can include a rear shell 110 and a front shell 120 connected with the rear shell 110. The rear shell 110 can be used to connect with the base mounting surface. The rear shell 110 and the front shell 120 can form a containing cavity for containing the smoke detection assembly. The rear shell 110 can be provided with a plurality of first air inlet holes 111, and the front shell 120 can be provided with a plurality of second air inlet holes 121. The first air inlet holes 111 and the second air inlet holes 121 can be in communication with the containing cavity, so as to facilitate the smoke entering the containing cavity, thereby facilitating the smoke detection assembly to detect the smoke.

[0035] Optionally, the mounting space 130 can be arranged on the front shell 120 and located on the side of the front shell 120 away from the rear shell 110. In this way, the user can conveniently disassemble and assemble the communication element 300, and conveniently trigger the reset element 400. Moreover, compared with the mode of arranging the mounting space 130 on the rear shell 110, arranging the mounting space 130 on the front shell 120 can avoid the mounting space 130 being limited by the battery compartment, thereby facilitating the increase of the size of the mounting space 130 and the cover plate 200, and thereby facilitating the increase of the operation space of the user.

[0036] In the embodiment, the communication element 300 can be a SIM card, and the installation space 130 can be provided with a mounting member 310 for mounting the SIM card. The mounting member 310 can be provided with a SIM card slot for accommodating the SIM card. The SIM card slot can be provided with an electrical connecting member for electrically connecting the SIM card and the smoke detection assembly, so that the SIM card can transmit the detection signal of the smoke detection assembly. The reset element 400 can be a mute switch, which can be electrically connected with the smoke detection assembly for canceling the alarm of the smoke detection assembly and realizing self-checking of the smoke detection assembly.

[0037] In the optional embodiment of the application, the cover plate 200 can be provided with a first clamping portion 210, and the installation space 130 can be provided with a first connecting portion 140. In the direction from the base installation surface to the detector main body 100, the first clamping portion 210 can be limitedly matched with the first connecting portion 140. In this way, the detachable connection of the cover plate 200 and the detector main body 100 can be realized, and the disassembly and assembly are simple and convenient. Of course, the cover plate 200 can also be detachably connected with the detector main body 100 through screws or other fixing members.

[0038] Optionally, the cover plate 200 can drive the first connecting portion 140 to move in the direction from the detector main body 100 to the base installation surface. In this way, the first connecting portion 140 can move synchronously with the cover plate 200, so as to avoid the hindering effect of the first connecting portion 140 on the movement of the cover plate 200. Further optionally, when the first clamping portion 210 is limitedly matched with the first connecting portion 140, the first connecting portion 140 is in contact with the cover plate 200, that is, there is no gap between the first connecting portion 140 and the cover plate 200. In this way, during the movement of the cover plate 200 relative to the detector main body 100, the first clamping portion 210 and the first connecting portion 140 always maintain the limited matching state, which is conducive to improving the connection stability of the cover plate 200 and the detector main body 100.

[0039] Of course, the first connecting portion 140 can not move in the direction from the detector main body 100 to the base installation surface, and when the first clamping portion 210 is limitedly matched with the first connecting portion 140, a gap is left between the first connecting portion 140 and the cover plate 200, so that the cover plate 200 can move relative to the first connecting portion 140 in the direction from the detector main body 100 to the base installation surface, thereby triggering the reset element 400.

[0040] In the optional embodiment, as Figure 1 and Figure 2As shown, one end of the first connecting portion 140 can be connected with the inner wall of the mounting space 130, and the other end of the first connecting portion 140 can be suspended in the mounting space 130. In this way, the first connecting portion 140 can be forced to swing in the direction from the detector main body 100 to the base mounting surface, and the first connecting portion 140 can also be formed as a spring arm structure, that is, the first connecting portion 140 has elasticity, and the first connecting portion 140 can also be reset after being forced to swing, and the first connecting portion 140 can also apply a force to the cover plate 200 to return to the initial position, so that the cover plate 200 is more convenient to return to the initial position and stop triggering the reset element 400.

[0041] Here, compared with the spring structure of the first connecting portion 140, the spring arm structure of the first connecting portion 140 is more stable when the first connecting portion 140 is subjected to the force of the cover plate 200, and can bear a larger load and is not easy to be permanently deformed and damaged.

[0042] In other embodiments, the first connecting portion 140 can also be a spring, one end of the spring is connected with the inner wall of the mounting space 130 away from the cover plate 200, and the other end of the spring is connected with the first clamping portion 210.

[0043] In optional embodiments, as shown in Figure 1 and Figure 2 The cover plate 200 can also be provided with a second clamping portion 220, the second clamping portion 220 can be spaced apart from the first clamping portion 210, and the mounting space 130 can also be provided with a second connecting portion 150, the second connecting portion 150 can be connected with the inner wall of the mounting space 130, and in the direction from the base mounting surface to the detector main body 100, the second clamping portion 220 can be limited and matched with the second connecting portion 150. In this way, the connection stability of the cover plate 200 and the detector main body 100 can be further improved.

[0044] Of course, the cover plate 200 can also not be provided with the second clamping portion 220, and the mounting space 130 can also not be provided with the second connecting portion 150, and the cover plate 200 and the detector main body 100 can be connected only by the limiting cooperation of the first clamping portion 210 and the first connecting portion 140.

[0045] Optionally, as shown in Figure 2 The first connecting portion 140 and the inner wall of the mounting space 130 can form a first through hole 143, the second connecting portion 150 and the inner wall of the mounting space 130 can form a second through hole 153, the first clamping portion 210 can pass through the first through hole 143, and the second clamping portion 220 can pass through the second through hole 153.

[0046] And the cover plate 200 can be switched between the first angle and the second angle, in the case that the cover plate 200 is at the first angle, the first clamping portion 210 is opposite to and can pass through the first through hole 143, and the second clamping portion 220 is opposite to and can pass through the second through hole 153; in the case that the cover plate 200 is at the second angle, in the direction from the base mounting surface to the detector main body 100, the first clamping portion 210 can be limited to cooperate with the first connecting portion 140, and the second clamping portion 220 can be limited to cooperate with the second connecting portion 150.

[0047] In this way, due to the existence of the first through hole 143 and the second through hole 153, when installing the cover plate 200, the first clamping portion 210 can directly pass through the first through hole 143, and the second clamping portion 220 can directly pass through the second through hole 153, which can reduce the step of finding the alignment point, is beneficial to positioning, and can constrain the rotation angle of the cover plate 200, thereby avoiding that the rotation angle of the cover plate 200 is too large to cause other components on the cover plate 200 to collide with the components in the mounting space 130 and the like.

[0048] Of course, the first connecting portion 140 and the inner wall of the mounting space 130 can also not form the first through hole 143, and the second connecting portion 150 and the inner wall of the mounting space 130 can also not form the second through hole 153, and the first clamping portion 210 and the second clamping portion 220 can directly extend into the mounting space 130, and by rotating the cover plate 200, the first clamping portion 210 directly clamps with the first connecting portion 140, and the second clamping portion 220 directly clamps with the second connecting portion 150.

[0049] Further optionally, as shown in Figure 7 At least one of the first clamping portion 210 and the second clamping portion 220 can be provided with a hook portion 230, and in the case that the cover plate 200 is at the second angle, in the circumferential direction of the cover plate 200, the hook portion 230 can be limited to cooperate with at least one of the first connecting portion 140 and the second connecting portion 150. In this way, the hook portion 230 can block the first clamping portion 210 and the first connecting portion 140 from being disengaged, and can block the second clamping portion 220 and the second connecting portion 150 from being disengaged, thereby further improving the connection stability of the cover plate 200 and the detector main body 100.

[0050] In the present embodiment, the hook portion 230 can be arranged on the first clamping portion 210 and the second clamping portion 220, and when the cover plate 200 is at the second angle, the hook portion 230 on the first clamping portion 210 can be in limit position cooperation with the first connecting portion 140 in the circumferential direction of the cover plate 200 to block the first clamping portion 210 and the first connecting portion 140 from being disengaged, thereby preventing the cover plate 200 from rotating relative to the probe body 100; the hook portion 230 on the second clamping portion 220 can be in limit position cooperation with the second connecting portion 150 in the circumferential direction of the cover plate 200 to block the second clamping portion 220 and the second connecting portion 150 from being disengaged, thereby further preventing the cover plate 200 from rotating relative to the probe body 100.

[0051] Of course, the hook portion 230 can also not be arranged on the first clamping portion 210 and the second clamping portion 220.

[0052] In some embodiments, as shown in Figure 1 and Figure 2 The first connecting portion 140 can include a first connecting segment 141 and a first clamping segment 142, one end of the first connecting segment 141 is connected with the inner wall of the mounting space 130, the first clamping segment 142 is connected with the other end of the first connecting segment 141, and the first clamping segment 142 is suspended in the mounting space 130, and here, the first connecting segment 141, the first clamping segment 142 and the inner wall of the mounting space 130 form a first through hole 143. In the direction from the foundation mounting surface to the probe body 100, the first clamping portion 210 can be in limit position cooperation with the first clamping segment 142, and the hook portion 230 of the first clamping portion 210 can be in limit position cooperation with the side of the first clamping segment 142 away from the first connecting segment 141 in the circumferential direction of the cover plate 200.

[0053] Optionally, in the direction from the foundation mounting surface to the probe body 100, the first clamping segment 142 can protrude from the first connecting segment 141. By arranging in this way, on the one hand, it is beneficial to increase the movement space of the first clamping segment 142, thereby facilitating the movement of the first clamping segment 142 in the direction from the probe body 100 to the foundation mounting surface, thereby facilitating the movement of the cover plate 200 in the direction from the probe body 100 to the foundation mounting surface, and on the other hand, the first clamping segment 142 can be in contact with the cover plate 200, thereby improving the connection stability of the first clamping portion 210 and the first connecting portion 140.

[0054] The second connecting portion 150 can include a second connecting segment 151 and a second clamping segment 152. One end of the second connecting segment 151 can be connected with the inner wall of the mounting space 130, the second clamping segment 152 is connected with the other end of the second connecting segment 151, and the second clamping segment 152 can be connected with the inner wall of the mounting space 130. Here, the second connecting segment 151, the second clamping segment 152 and the inner wall of the mounting space 130 form a second through hole 153. In the direction from the base mounting surface to the detector main body 100, the second clamping portion 220 can be limitedly matched with the second clamping segment 152, and the hook portion 230 of the second clamping portion 220 can be limitedly matched with the side of the second clamping segment 152 away from the second connecting segment 151 in the circumferential direction of the cover plate 200. Since the second connecting portion 150 and the second clamping segment 152 are both connected with the inner wall of the mounting space 130, the second connecting portion 150 is not easy to deform when subjected to the force of the cover plate 200, and thus can always maintain the state of clamping with the second clamping portion 220, thereby facilitating the stability of the assembly of the cover plate 200.

[0055] Optionally, in the direction from the base mounting surface to the detector main body 100, the second clamping segment 152 can protrude from the second connecting segment 151. In this way, on the one hand, the second clamping portion 220 can extend into the side of the second clamping segment 152 facing the base mounting surface, thereby facilitating the clamping of the second clamping portion 220 with the second clamping segment 152. On the other hand, the second clamping segment 152 can be in contact with the cover plate 200, thereby improving the connection stability of the second clamping portion 220 with the second connecting portion 150.

[0056] In the present embodiment, when the cover plate 200 rotates clockwise, the first clamping portion 210 can be clamped with the first clamping segment 142, and the second clamping portion 220 can be clamped with the second clamping segment 152. When the cover plate 200 rotates counterclockwise, the first clamping portion 210 can be disengaged from the first clamping segment 142, and the second clamping portion 220 can be disengaged from the second clamping segment 152.

[0057] In an optional embodiment, as shown in Figure 4 The cover plate 200 can be provided with an avoiding groove 240 on the side facing the base mounting surface. The avoiding groove 240 and the reset element 400 can be oppositely arranged to avoid the reset element 400. In this way, when the cover plate 200 is in the initial position, i.e., the cover plate 200 is not pressed, the cover plate 200 will not trigger the reset element 400, thereby avoiding the accidental triggering.

[0058] Of course, the cover plate 200 can also not be provided with the avoiding groove 240.

[0059] In an optional embodiment of the present application, as shown in Figure 2As shown, the smoke detector also comprises an indicator lamp 500, which is arranged in the mounting space 130. In this way, the indicator lamp 500 can be integrated with the communication element 300 and the reset element 400, thereby facilitating the reduction of the space occupied by these components. Furthermore, arranging the indicator lamp 500 in the mounting space 130 can eliminate the need for additional holes or slots in the detector main body 100, thereby facilitating the reduction of the mold cost and further reducing the manufacturing cost of the smoke detector.

[0060] In other embodiments, the indicator lamp 500 can also not be arranged in the mounting space 130.

[0061] In the present embodiment, the indicator lamp 500 can be communicatively connected to the smoke detection assembly as described above. When the smoke detection assembly alarms, the indicator lamp 500 remains in the lit state, thereby serving as a double alarm.

[0062] In optional embodiments, as shown, Figure 9 the cover plate 200 can comprise a first portion 201 and a second portion 202 connected to the first portion 201. The first portion 201 can be arranged opposite to the indicator lamp 500, and the second portion 202 can cover the portion of the mounting space 130 other than the indicator lamp 500. The thickness of the first portion 201 can be less than that of the second portion 202, and the first portion 201 can allow the light of the indicator lamp 500 to pass through. In this way, by thinning the first portion 201 of the cover plate 200 to allow light to pass through, the light guide column and the through hole for the light guide column to pass through in the cover plate 200 can be eliminated, thereby further saving materials and reducing the mold cost.

[0063] In other embodiments, the cover plate 200 can also be provided with a through hole, and the smoke detector can also comprise a light guide column. The light guide column can be located on the side of the indicator lamp 500 away from the base mounting surface and extend out of the cover plate 200 through the through hole. In this way, the light of the indicator lamp 500 can be transmitted to the outside of the cover plate 200 through the light guide column.

[0064] Optionally, the cover plate 200 can be provided with a light guide portion 250 on the side facing the base mounting surface. The light guide portion 250 can be provided with a light guide hole 251, and at least part of the indicator lamp 500 can extend into the light guide hole 251. In this way, the light guide portion 250 can serve as a light collector and a light guide, so that the light of the indicator lamp 500 can be more radiated onto the first portion 201 of the cover plate 200, and the light of the indicator lamp 500 can be more transmitted through the cover plate 200, thereby facilitating the improvement of the illumination brightness of the indicator lamp 500.

[0065] It should be noted that, since the indicator light 500 at least partially extends into the light guide hole 251, the inner wall of the light guide portion 250 can shield and reflect the light around the indicator light 500, so that part of the light around the indicator light 500 can be reflected onto the first portion 201 of the cover plate 200, and then more light can be transmitted through the cover plate 200.

[0066] Of course, the side of the cover plate 200 facing the base mounting surface can also not be provided with the light guide portion 250.

[0067] Further optionally, in order to avoid the light guide portion 250 colliding with the indicator light 500 when the cover plate 200 rotates relative to the probe body 100, causing damage to the indicator light 500, a through slot 252 can also be provided on the side wall of the light guide portion 250, the through slot 252 can be provided at the end of the light guide portion 250 away from the cover plate 200, and the through slot 252 can be in communication with the light guide hole 251. Here, the indicator light 500 can be located on the rotation path of the light guide portion 250, and at least part of the indicator light 500 can enter the light guide hole 251 through the through slot 252.

[0068] In addition, in order to ensure that the light guide portion 250 does not collide with the indicator light 500 when the cover plate 200 rotates clockwise and counterclockwise, a through slot 252 can be provided on the opposite two side walls of the light guide portion 250, both of the through slots 252 can be in communication with the light guide hole 251, and at least part of the indicator light 500 can enter the light guide hole 251 through the two through slots 252, respectively.

[0069] Here, the light guide portion 250 and the cover plate 200 can be an integral structure, for example, the light guide portion 250 and the cover plate 200 can be injection molded as an integral structure.

[0070] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the specific embodiments described above, which are only illustrative and not limiting, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims.

Claims

1. A smoke detector, characterized in that, include: The detector body (100) is used to be installed on the base mounting surface, and the detector body (100) is provided with an installation space (130). A communication element (300) and a reset element (400) are provided, both of which are disposed within the mounting space (130); A cover plate (200) is detachably connected to the detector body (100) and is used to close the mounting space (130). The cover plate (200) is movable along the direction from the detector body (100) to the base mounting surface to trigger the reset element (400).

2. The smoke detector according to claim 1, characterized in that, The cover plate (200) is provided with a first snap-fit ​​part (210), and the installation space (130) is provided with a first connecting part (140). In the direction from the base mounting surface to the detector body (100), the first snap-fit ​​part (210) can be limited and cooperated with the first connecting part (140). The cover plate (200) can drive the first connecting part (140) to move along the direction from the detector body (100) to the base mounting surface.

3. The smoke detector according to claim 2, characterized in that, One end of the first connecting part (140) is connected to the inner wall of the installation space (130), and the other end of the first connecting part (140) is suspended in the installation space (130).

4. The smoke detector according to claim 2, characterized in that, The cover plate (200) is also provided with a second snap-fit ​​part (220), which is spaced apart from the first snap-fit ​​part (210). The installation space (130) is also provided with a second connecting part (150), which is connected to the inner wall of the installation space (130). In the direction from the base mounting surface to the detector body (100), the second snap-fit ​​part (220) can be limited and cooperated with the second connecting part (150).

5. The smoke detector according to claim 4, characterized in that, A first through hole (143) is formed between the first connecting part (140) and the inner wall of the mounting space (130), and a second through hole (153) is formed between the second connecting part (150) and the inner wall of the mounting space (130). The first snap-fit ​​part (210) can pass through the first through hole (143), and the second snap-fit ​​part (220) can pass through the second through hole (153). The cover plate (200) can be switched between a first angle and a second angle. When the cover plate (200) is at the first angle, the first snap-fit ​​part (210) is opposite to the first through hole (143) and can pass through the first through hole (143), and the second snap-fit ​​part (220) is opposite to the second through hole (153) and can pass through the second through hole (153). When the cover plate (200) is at the second angle, in the direction from the base mounting surface to the detector body (100), the first snap-fit ​​part (210) can be limited to the first connecting part (140), and the second snap-fit ​​part (220) can be limited to the second connecting part (150).

6. The smoke detector according to claim 5, characterized in that, At least one of the first latching portion (210) and the second latching portion (220) is provided with a hook portion (230). When the cover plate (200) is at the second angle, the hook portion (230) can be engaged with at least one of the first connecting portion (140) and the second connecting portion (150) in the circumferential direction of the cover plate (200).

7. The smoke detector according to claim 1, characterized in that, The cover plate (200) has a relief groove (240) on the side facing the base mounting surface, and the relief groove (240) is disposed opposite to the reset element (400).

8. The smoke detector according to claim 1, characterized in that, The smoke detector also includes an indicator light (500), which is disposed within the installation space (130).

9. The smoke detector according to claim 8, characterized in that, The cover plate (200) includes a first part (201) and a second part (202) connected to the first part (201). The first part (201) is disposed opposite to the indicator light (500). The second part (202) covers the part of the installation space (130) other than the indicator light (500). The thickness of the first part (201) is less than the thickness of the second part (202), and the first part (201) allows light from the indicator light (500) to pass through.

10. The smoke detector according to claim 9, characterized in that, The cover plate (200) has a light guide (250) on the side facing the base mounting surface. The light guide (250) has a light guide hole (251). At least a portion of the indicator light (500) can extend into the light guide hole (251).

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