Detector shell and fire smoke detector

Abstract

The invention discloses a detector shell and a fire smoke detector, and belongs to the technical field of smoke alarm, the detector shell comprises a shell body, a cover body, a sealing member, an upper cover and a supporting cover, the cover body is embedded in the shell body, the cover body is matched with the shell body, the edge of the cover body extends downwards and is tightly attached to the inner wall of the shell body, and the top surface of the cover body is flush with the top surface of the inner wall of the shell body; the sealing piece is placed on the cover body, the edge of the sealing piece abuts against the flange of the shell, the upper cover is placed on the sealing piece, the shell, the cover body, the sealing piece and the upper cover are tightly connected through screws, and the supporting cover is fixed to the cover body. According to the detector shell and the fire smoke detector, an embedded structure is adopted, the possibility that water vapor and dust enter the interior along shell gaps to erode the control assembly is effectively reduced, and disassembly and maintenance are convenient.

Description

Technical Field

[0001] This invention relates to the field of smoke alarm technology, and in particular to a detector housing and a fire smoke detector. Background Technology

[0002] Fire smoke detectors are photoelectric sensors that can effectively detect the slight smoke that occurs in the early stages of a fire and issue early warnings to remind people to evacuate and take corresponding preventive and emergency measures, thereby reducing the probability of fire and effectively reducing life safety and property loss. They are widely used in many fields.

[0003] Fire smoke detectors internally consist of sensing and control components. The sensing component detects smoke concentration and transmits signals to the control component. Since the environment in which fire smoke detectors are installed inevitably contains moisture and dust, these substances can potentially enter the interior through gaps in the detector's housing, damaging the internal control components and affecting the detector's normal operation. Therefore, fire smoke detectors need to achieve an IP67 protection rating. Current fire smoke detectors typically use a housing and a top cover to house the sensing and control components, without separately sealing the control components. Moisture or dust can then enter the smoke detector through the gaps between the housing and the top cover, leading to component damage. Summary of the Invention

[0004] The present invention aims to provide a detector housing and a fire smoke detector. The detector housing adopts a snap-fit ​​embedded structure, which effectively reduces the possibility of water vapor and dust entering the internal control components through the gaps in the housing and facilitates disassembly and maintenance.

[0005] To achieve the above objectives, the technical solution of the present invention is: a detector housing, comprising a housing, a cover, and a seal, wherein the cover is embedded in the housing and matches the housing, the edge of the cover extends downward and is in close contact with the inner wall of the housing, and the seal is placed on the cover and fits tightly against the cover, the edge of the seal abutting against the flange of the housing.

[0006] In a preferred embodiment of the present invention, the housing further includes a recessed screw hole, a plurality of recessed screw holes are disposed on the inner wall of the housing, the outer wall of the recessed screw hole is fixedly connected to the inner wall of the housing, and a screw is inserted into the recessed screw hole.

[0007] In a preferred embodiment of the present invention, the cover includes a limiting hole, the limiting hole being formed at the edge of the cover, the limiting hole matching the recessed screw hole, and the recessed screw hole being embedded in the limiting hole.

[0008] In a preferred embodiment of the present invention, the housing further includes a snap fastener disposed on the inner wall of the housing.

[0009] In a preferred embodiment of the present invention, the cover further includes a snap-fit ​​portion, which is formed on the edge of the cover and engages with the buckle.

[0010] In a preferred embodiment of the present invention, the housing further includes a first positioning strip, which is disposed on the inner wall of the housing, and the top surface of the first positioning strip is flush with the top surface of the inner wall of the housing.

[0011] In a preferred embodiment of the present invention, the cover further includes a first positioning hole, which matches the first positioning strip, and the first positioning strip is embedded in the first positioning hole.

[0012] In a preferred embodiment of the present invention, the housing includes a panel, a side wall, and a mounting plate. The panel is connected to the bottom surface of the side wall, and the mounting plate is located above the panel. A sensing component is mounted above the mounting plate, and a control component is mounted below it. The pins of the sensing component pass through the mounting plate and are connected to the control component.

[0013] In a preferred embodiment of the present invention, the bottom surface of the cover abuts against the mounting plate.

[0014] In a preferred embodiment of the present invention, the housing further includes a second positioning strip, a plurality of the second positioning strips are disposed on the side wall, the second positioning strips extend from the bottom surface of the side wall to the top surface, and the second positioning strips position and install the mounting plate.

[0015] In a preferred embodiment of the present invention, the detector housing further includes an upper cover and a support cover, the upper cover being placed on the sealing element and pressing the sealing element, and the support cover being fixed to the cover body.

[0016] In a preferred embodiment of the present invention, the support cover includes a positioning ring disposed on the cover body and connected to the bottom edge of the support cover for positioning and installing the sealing element and the top cover.

[0017] The present invention also provides a fire smoke detector, comprising a detector housing as described above, and further comprising a sensing component and a control component, wherein the sensing component and the control component are installed inside the housing, and the sensing component is connected to the control component.

[0018] In a preferred embodiment of the present invention, the sensing component includes a main body and a housing, the main body and the housing are fixedly connected, the upper part of the main body and the housing are located inside the support cover, and the edge of the housing abuts against the inner wall of the support cover.

[0019] In a preferred embodiment of the present invention, the cover includes a smoke inlet, and a plurality of smoke inlets are evenly provided on the cover, through which smoke enters the main body.

[0020] In a preferred embodiment of the present invention, the cover further includes smoke baffles, and a plurality of smoke baffles are radially distributed from the center of the top surface of the cover, the smoke baffles being used to uniformly divide the cover into several smoke inlet areas.

[0021] In a preferred embodiment of the present invention, the support cover of the detector housing further includes support ribs and support strips. A plurality of support ribs are disposed on the inner wall of the support cover, and a plurality of support strips are radially distributed from the center of the bottom of the top surface of the support cover. The positions of the support ribs, the support strips and the smoke baffle are corresponding.

[0022] In a preferred embodiment of the present invention, the support cover further includes a fixing member disposed on the support bar, the fixing member clamping the smoke baffle.

[0023] In a preferred embodiment of the present invention, the fire smoke detector further includes an interface, which communicates with the housing and is connected to a wire connector; one end of the interface near the housing is a threaded portion, and the other end away from the housing is a locking portion; when the interface is connected to the wire connector, the locking portion is deformed under pressure and abuts against the interior of the wire connector, forming a self-locking mechanism.

[0024] This invention provides a detector housing and a fire smoke detector. The snap-fit ​​embedded design replaces the traditional method requiring additional parts such as screws for installation and assembly, reducing stacking defects during housing production and avoiding potential interlayer protection failures, thus simplifying and streamlining the structure. Simultaneously, the sealing element effectively reduces the possibility of water and dust entering the interior through gaps between the housing and cover, enhancing sealing and effectively preventing damage to the control components from water and dust, extending their service life. Furthermore, by setting a smoke baffle on the sensing component, along with support ribs and support strips, the installation of the sensing component is stabilized, and the smoke entry area is evenly divided, allowing smoke particles to enter the sensing component more uniformly, increasing detection accuracy. By setting multiple limit and positioning points, using recessed screw holes and a prefabricated installation method, the frequency of disassembly on the energy storage battery pack is reduced, lowering the risk of compromising the battery pack's airtightness. Installation and disassembly are simple, facilitating future maintenance.

[0025] To make the above-mentioned features and advantages of the invention more apparent and understandable, specific embodiments are described below, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description

[0026] Figure 1This is a schematic diagram of the fire smoke detector of the present invention.

[0027] Figure 2 This is an exploded view of the fire smoke detector structure of the present invention.

[0028] Figure 3 This is a cross-sectional schematic diagram of the fire smoke detector of the present invention.

[0029] Figure 4 This is a schematic diagram of the mounting plate of the present invention.

[0030] Figure 5 This is a schematic diagram of the cover installation of the present invention.

[0031] Figure 6 This is a schematic diagram of the cover structure of the present invention.

[0032] Figure 7 This is a schematic diagram of the panel of the present invention.

[0033] 1-Outer shell; 11-Housing shell; 111-Panel; 112-Side wall; 113-Mounting plate; 114-Counterhead screw hole; 115-First positioning strip; 116-Snap fastener; 117-Second positioning strip; 12-Cover; 121-Limiting hole; 122-First positioning hole; 123-Snap-fit ​​part; 124-Lamp hole; 13-Sealing element; 131-Second positioning hole; 132-First mounting hole; 14-Top cover; 141-Third positioning hole; 142-Second mounting hole; 15-Support cover; 151-Positioning ring; 152-Supporting rib; 153-Supporting strip; 154-Fixing element; 2-Sensing component; 21-Main body; 22-Cover; 221-Smoke inlet; 222-Smoke baffle; 3-Interface; 31-Threaded part; 32-Locking part; 4-Wire connector; 5-Rubber ring.

[0034] In the accompanying drawings, similar reference numerals refer to the same elements. Detailed Implementation

[0035] To make the objectives and technical solutions of the embodiments of the present invention clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of the present invention. Figure 1 -Appendix Figure 7 The technical solutions of the embodiments of the present invention will be clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In this invention, for clarity, the following description is provided: The observer faces the attached... Figure 1 Observe and attach Figure 1The placement of the fire smoke detector is used as a reference. In this invention, terms indicating location such as "upper," "lower," "top," and "bottom" are all used in conjunction with the attached text. Figure 1 The orientation is for reference only. The above description is only for the purpose of clearly describing the present invention, and is not intended to indicate or imply that the structure or component referred to must have a specific orientation or be constructed in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0037] like Figure 1 As shown, a fire smoke detector includes a detector housing 1, a sensing component 2, and a control component (not shown in the figure). The sensing component 2 and the control component are disposed inside the detector housing 1 and are connected. The sensing component 2 detects the smoke concentration and transmits a signal to the control component. When the smoke concentration reaches a certain value, the control component issues an alarm signal. The control component is sealed inside the detector housing 1 to prevent water or dust from entering the detector housing 1 and contaminating the control component.

[0038] like Figure 2 As shown, the detector housing 1 includes a housing 11, a cover 12, and a seal 13. The cover 12 is embedded in and fixed in the housing 11. The cover 12 matches the housing 11. The edge of the cover 12 extends downward and is in close contact with the inner wall of the housing 11. The seal 13 is placed on the cover 12 and fits tightly against the cover 12.

[0039] The detector housing 1 also includes an upper cover 14 and a support cover 15. The upper cover 14 is placed on and fixed to the sealing member 13, pressing the sealing member 13. The support cover 15 is fixed to the cover body 12. The support cover 15 has a side hollow structure. The support cover 15 covers the upper part of the sensing component 2 and is used to fix the sensing component 2 and assist in guiding the smoke into the sensing component 2.

[0040] Specifically, the screws pass through the housing 11, the cover 12, the seal 13, and the top cover 14 in sequence, so that the components are in close contact.

[0041] like Figure 3As shown, the housing 11 includes a panel 111, a side wall 112, and a mounting plate 113. The panel 111 serves as the bottom surface of the housing 11 and is fixedly connected to the bottom surface of the side wall 112. The panel 111 is connected to the control component. The mounting plate 11 is mounted above the panel 111. The mounting plate 113 divides the internal space of the housing 11 into two layers. The control component is mounted between the mounting plate 113 and the panel 111. The sensing component 2 is mounted on the mounting plate 113, and the pins of the sensing component 2 pass through the mounting plate 113 and connect to the control component. The panel 111 displays the operating status of the fire smoke detector. The inner wall of the side wall 112 is thickened, and the outer wall of the side wall 112 extends upward to form a flange.

[0042] Specifically, the top surface of the cover 12 is flush with the top surface of the inner wall of the side wall 112, and the bottom surface of the cover 12 abuts against the mounting plate 113.

[0043] Specifically, the seal 13 is annular, and the edge of the seal 13 abuts against the flange of the sidewall 112.

[0044] like Figure 4 As shown, the housing 11 also includes a recessed screw hole 114. A plurality of recessed screw holes 114 are symmetrically arranged on the side wall 112. The outer wall of the recessed screw hole 114 is fixedly connected to the inner wall of the side wall 112. The recessed screw hole 114 is embedded in the cover 12, and a screw passes through the recessed screw hole 114.

[0045] like Figure 4 As shown, the housing 11 also includes a first positioning strip 115, which is disposed on the inner wall of the side wall 112. The first positioning strip 115 extends from the bottom surface of the side wall 112 to the top surface, and the top surface of the first positioning strip 115 is flush with the top surface of the inner wall of the side wall 112. The first positioning strip 115 is used to guide the cover 12 into the housing 11 and perform positioning and installation.

[0046] like Figure 4 As shown, the housing 11 also includes a buckle 116, which is disposed on the inner wall of the side wall 112 and fixes the cover 12 inside the housing 11.

[0047] like Figure 4 As shown, the cover 12 includes a limiting hole 121, which is opened at the edge of the cover 12. The position and shape of the limiting hole 121 match the sinking screw hole 114. After the cover 12 is placed into the housing 11, the top of the sinking screw hole 114 is embedded in the limiting hole 121.

[0048] like Figure 5 As shown, the cover 12 also includes a first positioning hole 122, which is formed on the edge of the cover 12. The shape and position of the first positioning hole 122 match the first positioning strip 115, and the first positioning strip 115 is embedded in the first positioning hole 122.

[0049] The cover 12 also includes a snap-fit ​​portion 123, which is formed on the edge of the cover 12 and matches the buckle 116. When the cover 12 is pushed into the housing 11, the buckle 116 is first deformed by pressure and then springs up to snap into the snap-fit ​​portion 123. The buckle 116 and the snap-fit ​​portion 123 are engaged, fixing the cover 12 inside the housing 11.

[0050] like Figure 4 As shown, the housing 11 also includes a second positioning strip 117. A plurality of second positioning strips 117 are disposed on the side wall 112. The second positioning strips 117 extend from the bottom surface to the top surface of the side wall 112. The top surface of the second positioning strip 117 is flush with the height of the mounting plate 113. The second positioning strip 117 is used to guide the positioning and installation of the mounting plate 113.

[0051] Specifically, the first positioning strip 115 and the second positioning strip 117 are designed as thermally sensitive dual columns, which can offset or isolate the thermal expansion and contraction stress caused by temperature changes in the housing 11, prevent such stress from being transmitted to the internal sensing component 2, and provide support, enhance the anti-collision performance of the housing 11, protect the sensing component 2, and extend its service life.

[0052] like Figure 5 As shown, the support cover 15 includes a positioning ring 151, which is disposed on the cover 12 and is connected to the bottom edge of the support cover 15.

[0053] The sealing element 13 includes a second positioning hole 131, which is formed on the inner edge of the sealing element 13. The sealing element 13 is placed on the cover body 12. The positioning ring 151 is embedded in the second positioning hole 131. The positioning ring 151 positions the sealing element 13 so that the sealing element 13 can better achieve the sealing function.

[0054] like Figure 2 As shown, the upper cover 14 includes a third positioning hole 141, the opening position of which corresponds to the second positioning hole 131, and is positioned and installed by the positioning ring 151.

[0055] like Figure 2As shown, the sealing element 13 includes a first mounting hole 132, which penetrates the sealing element 13.

[0056] The upper cover 14 includes a second mounting hole 142, which passes through the upper cover 14.

[0057] Specifically, the first mounting hole 132 is connected to the second mounting hole 142. The first mounting hole 132 and the second mounting hole 142 correspond to the through hole position of the countersunk screw hole 114. The screw passes through the first mounting hole 132 and the second mounting hole 142 in sequence from the countersunk screw hole 114 to fix the housing 11, the seal 13 and the top cover 14 together.

[0058] The detector housing 1 also uses ring-shaped machine-applied silicone to form an integrated effect that is both sealed and bonded, resulting in better shock and impact resistance and sealing performance.

[0059] like Figure 2 As shown, the sensing component 2 includes a main body 21 and a cover 22. The main body 21 is fixedly connected to the cover 22. The main body 21 is mounted on the mounting plate 113. The upper part of the main body 21 and the cover 22 are located inside the support cover 15. The edge of the cover 22 abuts against the inner wall of the support cover 15.

[0060] Specifically, the structure of the main body 21 can be a publicly disclosed structure in the prior art, which will not be described in detail in this invention.

[0061] like Figure 2 As shown, the cover 22 is conical and includes a smoke inlet 221. Multiple smoke inlets 221 are evenly distributed on the cover 22, and smoke enters the main body 21 from the smoke inlet 221.

[0062] like Figure 2 As shown, the cover 22 also includes smoke baffles 222. Multiple smoke baffles 222 are radially distributed from the center of the top surface of the cover 22. The smoke baffles 222 are used to evenly divide the cover 22 into several smoke inlet areas, so that smoke particles enter the main body 21 from all directions through the smoke inlet 221, increasing the accuracy of smoke detection, and can effectively resist bending and squeezing from different directions, and are not prone to permanent deformation.

[0063] Specifically, the smoke shield 222 is preferably composed of 6 pieces.

[0064] like Figure 6As shown, the support cover 15 also includes support ribs 152 and support strips 153. A plurality of support ribs 152 are disposed on the inner wall of the support cover 15, and a plurality of support strips 153 are radially distributed from the center of the bottom of the top surface of the support cover 15. The positions of the support ribs 152, the support strips 153 and the smoke baffle 222 are corresponding, which are used to enhance the strength of the support cover 15 and to position and fix the installation of the sensing component 2.

[0065] Specifically, the support rib 152 and the support strip 153 stabilize the installation of the sensing component 2, preventing the sensing component 2 from shifting during the installation of the fire smoke detector. Furthermore, the support rib 152 and the support strip 153 work together with the smoke baffle 222 to ensure that smoke particles enter the main body 21 evenly from all directions, thereby enhancing the detection accuracy.

[0066] like Figure 6 As shown, the support cover 15 also includes a fixing member 154, which is disposed on the support bar 153. The fixing member 154 clamps the smoke baffle 222 and is used to fix the sensing component 2 to prevent the sensing component 2 from becoming loose and falling off after the fire smoke detector is installed at the detection position, thus affecting the detection.

[0067] like Figure 2 As shown, the fire smoke detector uses a prefabricated wiring harness for external connection. The fire smoke detector also includes an interface 3, which is connected to the side wall 112 and connected to a wire connector 4 for powering the fire smoke detector.

[0068] The interface 3 adopts a waterproof clamp design. The end of the interface 3 near the side wall 112 is a threaded part 31, and the end away from the side wall 112 is a locking part 32. A rubber ring 5 is fitted on the outside of the wire connector 4. After the wire connector 4 is inserted into the interface 3, the hexagonal nut is rotated and tightened on the threaded part 31.

[0069] Specifically, the locking part 32 is composed of multiple circumferentially arranged protrusions. The wire connector 4 is inserted into the interface 3, and a rubber ring 5 is fitted on the outside of the wire connector 4. The rubber ring 5 is located inside the locking part 32. When the hexagonal nut is tightened, the locking part 32 is in close contact with the inner wall of the wire connector 4. The locking part 32 is deformed and its radius is reduced under force, pressing against the inner wall of the wire connector 4 to form a self-locking mechanism. This effectively prevents the wire from falling off and can better seal the connection.

[0070] Specifically, the protrusion of the locking part 32 can be a parallelogram-like cross-section as shown in the figure. It can also be other structures disclosed in the prior art.

[0071] The preferred mounting hole spacing of the fire smoke detector is a square of 36mm × 36mm, which is compatible with multiple installation methods and maximizes space utilization.

[0072] like Figure 7 As shown, in order to clearly display the working status of the fire smoke detector, a light-transmitting area 1111 and an indicator light 1112 can be provided on the panel 111. The middle part of the panel 111 is recessed, and the light-transmitting area 1111 and the indicator light 1112 are installed in the recess. The light-transmitting area 1111 and the indicator light 1112 are connected to the control component, and the working status of the fire smoke detector can be viewed through the light-transmitting area 1111 and the indicator light 1112.

[0073] like Figure 6 As shown, the cover 12 also includes a lamp hole 124, which is formed on the cover 12 and is used to install the indicator light 1112.

[0074] Specifically, the light-transmitting area 1111 can be a thin film light-transmitting design, which can better ensure the sealing effect compared with the traditional film adhesive design.

[0075] Furthermore, a light-transmitting hole can be opened on the other side of the detector housing 1 to achieve double-sided light transmission.

[0076] This invention provides a detector housing and a fire smoke detector. The snap-fit ​​embedded design replaces the traditional method requiring additional parts such as screws for installation and assembly, reducing stacking defects during housing production and avoiding potential interlayer protection failures, thus simplifying and streamlining the structure. Simultaneously, the sealing element effectively reduces the possibility of water and dust entering the interior through gaps between the housing and cover, enhancing sealing and effectively preventing damage to the control components from water and dust, extending their service life. Furthermore, by setting a smoke baffle on the sensing component, along with support ribs and support strips, the installation of the sensing component is stabilized, and the smoke entry area is evenly divided, allowing smoke particles to enter the sensing component more uniformly, increasing detection accuracy. By setting multiple limit and positioning points, using recessed screw holes and a prefabricated installation method, the frequency of disassembly on the energy storage battery pack is reduced, lowering the risk of compromising the battery pack's airtightness. Installation and disassembly are simple, facilitating future maintenance.

[0077] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A detector housing, characterized in that, The device includes a housing, a cover, and a seal. The cover is embedded within the housing and matches the housing. The edge of the cover extends downward and is in close contact with the inner wall of the housing. The seal is placed on the cover and fits tightly against the cover. The edge of the seal abuts against the flange of the housing.

2. The detector housing as described in claim 1, characterized in that, The housing also includes recessed screw holes, and a plurality of recessed screw holes are disposed on the inner wall of the housing. The outer wall of the recessed screw holes is fixedly connected to the inner wall of the housing, and screws are inserted into the recessed screw holes.

3. A detector housing as described in claim 2, characterized in that, The cover includes a limiting hole, which is located at the edge of the cover and matches the recessed screw hole, which is embedded in the limiting hole.

4. A detector housing as described in claim 3, characterized in that, The housing also includes a latch, which is disposed on the inner wall of the housing.

5. A detector housing as described in claim 4, characterized in that, The cover also includes a snap-fit ​​part, which is provided on the edge of the cover and snaps into the buckle.

6. A detector housing as described in claim 5, characterized in that, The housing also includes a first positioning strip, which is disposed on the inner wall of the housing.

7. A detector housing as described in claim 6, characterized in that, The cover also includes a first positioning hole, which matches the first positioning strip, and the first positioning strip is embedded in the first positioning hole.

8. A detector housing as described in claim 7, characterized in that, The housing includes a panel, a side wall, and a mounting plate. The panel is connected to the bottom surface of the side wall. The mounting plate is located above the panel. A sensing component is mounted above the mounting plate, and a control component is mounted below it. The pins of the sensing component pass through the mounting plate and are connected to the control component.

9. A detector housing as described in claim 8, characterized in that, The bottom surface of the cover abuts against the mounting plate.

10. A detector housing as described in claim 9, characterized in that, The housing also includes a second positioning strip, a plurality of the second positioning strips are disposed on the side wall, the second positioning strips extend from the bottom surface of the side wall to the top surface, and the second positioning strips position and install the mounting plate.

11. A detector housing as described in claim 10, characterized in that, The detector housing also includes an upper cover and a support cover. The upper cover is placed on the seal and presses the seal against it, and the support cover is fixed to the cover.

12. A detector housing as described in claim 11, characterized in that, The support cover includes a positioning ring disposed on the cover body and connected to the bottom edge of the support cover for positioning and installing the seal and the top cover.

13. A fire smoke detector, comprising a detector housing as described in any one of claims 1-12, characterized in that, It also includes a sensing component and a control component, which are installed inside the housing and connected to the control component.

14. The fire smoke detector as described in claim 13, characterized in that, The sensing component includes a main body and a housing, the main body and the housing are fixedly connected, the upper part of the main body and the housing are located inside the support cover, and the edge of the housing abuts against the inner wall of the support cover.

15. The fire smoke detector as described in claim 14, characterized in that, The detector housing includes a smoke inlet, and multiple smoke inlets are evenly distributed on the housing, through which smoke enters the main body.

16. The fire smoke detector as described in claim 15, characterized in that, The cover also includes smoke baffles, and a plurality of smoke baffles are radially distributed from the center of the top surface of the cover. The smoke baffles are used to uniformly divide the cover into several smoke inlet areas.

17. The fire smoke detector as described in claim 16, characterized in that, The support cover also includes support ribs and support strips. A plurality of support ribs are disposed on the inner wall of the support cover, and a plurality of support strips are radially distributed from the center of the bottom of the top surface of the support cover. The positions of the support ribs, the support strips and the smoke baffle are corresponding.

18. The fire smoke detector as described in claim 17, characterized in that, The support cover also includes a fixing member, which is disposed on the support bar and clamps the smoke baffle.

19. The fire smoke detector as described in claim 18, characterized in that, The fire smoke detector also includes an interface that communicates with the housing and is connected to a wire connector. The end of the interface near the housing is a threaded part, and the end away from the housing is a locking part. When the interface is connected to the wire connector, the locking part is deformed under pressure and presses against the inside of the wire connector to form a self-locking mechanism.

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