Smoke alarm with split labyrinth structure

Abstract

The utility model relates to a smoke alarm with a split type labyrinth structure. The smoke alarm comprises a smoke alarm main body, a labyrinth assembly and a mounting base for mounting a smoke sensor, the smoke alarm main body comprises a bottom shell and a surface shell; a working cavity is formed between the bottom shell and the surface shell, and the labyrinth assembly is arranged in the working cavity; the labyrinth assembly comprises a top cover, a plurality of labyrinth partition plates vertically arranged on the lower surface of the top cover, and a bottom plate with a first mounting groove in the upper surface; the multiple labyrinth partition plates are annularly distributed, the lower ends of the labyrinth partition plates are arranged in the first mounting grooves, first mounting holes matched with the mounting bases are formed in the bottom faces of the first mounting grooves in a penetrating mode, and the bottom plate is detachably connected with the mounting bases; according to the utility model, the labyrinth components and the labyrinth components are of a split structure, so that the processing cost during injection molding of a mold is reduced, and the cost control of an enterprise is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of smoke alarms, in particular to a smoke alarm with a split-type maze structure. Background Art

[0002] The smoke alarm can detect the concentration of smoke in the air. A smoke maze is set inside the smoke alarm to allow smoke to flow into the smoke alarm while blocking external light sources from affecting the detection of light scattering by the photosensitive receiving tube in the smoke alarm. After the smoke enters the maze, the light beam emitted by the transmitting tube in the maze will be reflected into the photosensitive receiving tube by the smoke particles in the smoke, and trigger an early warning when the smoke concentration reaches a certain level, thereby reducing the probability of fire, protecting people's lives and reducing property losses.

[0003] Currently, the maze components and the mounting bases of the mazes in the smoke alarms on the market all adopt an integrated structure, which is relatively complex. This leads to high processing costs for injection molds, which is not conducive to the company's cost control. Utility Model Content

[0004] The utility model aims to provide a smoke alarm with a split maze structure in view of the deficiencies in the prior art. The smoke alarm with a split maze structure can well solve the above problems.

[0005] In order to achieve the above requirements, the technical solution adopted by the utility model to solve its technical problems is:

[0006] A smoke alarm with a split labyrinth structure is provided, comprising a smoke alarm body, a labyrinth assembly, and a mounting base for mounting a smoke sensor; the smoke alarm body comprises a bottom shell and a front shell; a working chamber is arranged between the bottom shell and the front shell, and the labyrinth assembly is arranged in the working chamber; the labyrinth assembly comprises a top cover, a plurality of labyrinth partitions vertically arranged on the lower surface of the top cover, and a bottom plate with a first mounting groove on the upper surface; the plurality of labyrinth partitions are distributed in a ring shape, the lower ends of the labyrinth partitions are arranged in the first mounting groove, a first mounting hole adapted to the mounting base is penetrated through the bottom surface of the first mounting groove, and the bottom plate is detachably connected to the mounting base.

[0007] The utility model discloses a smoke alarm with a split-type maze structure, wherein a circular bracket which is detachably connected to the bottom shell is arranged at the upper end thereof, and a connecting mechanism is arranged between the bracket and the bottom shell.

[0008] The utility model discloses a smoke alarm with a split-type maze structure, wherein the connecting mechanism comprises an L-shaped mounting piece which is vertically arranged on the lower surface of the bracket; the lateral end of the mounting piece is arranged in a counterclockwise direction coaxial with the bracket, a positioning groove is vertically arranged on the outward surface of the lateral end, a positioning hole for the mounting piece to extend into is arranged on the upper surface of the bottom shell, the lateral end extends below the lower surface of the bottom shell, a mounting block which is fitted with the lateral end is also arranged on the lower surface of the bottom shell, and a positioning protrusion which is snapped into the positioning groove is arranged on the surface of the mounting block which contacts the lateral end and corresponds to the positioning groove.

[0009] The utility model provides a smoke alarm with a split maze structure, wherein a long strip-shaped positioning piece is horizontally arranged on the lower surface of the bracket; one end of the positioning piece is fixed on the lower surface of the bracket, and the other end is arranged in a clockwise direction coaxial with the bracket, and a second mounting groove is arranged on the upper surface of the bottom shell corresponding to the positioning piece, the length of the second mounting groove is longer than the length of the positioning piece, the positioning piece is arranged in the second mounting groove, and the outer peripheral side wall of the positioning piece is abutted against the inner peripheral side wall of the second mounting groove.

[0010] The utility model provides a smoke alarm with a split-type maze structure, wherein three positioning rods are vertically arranged on the lower surface of the top cover, the three positioning rods are distributed in a triangle, and the upper surface of the bottom plate is provided with first positioning grooves corresponding to the positioning rods.

[0011] The utility model discloses a smoke alarm with a split-type maze structure, in which a shading net is sleeved on the outer side of an annular structure composed of a plurality of maze partitions, the bottom surface of the first mounting groove is circular and a ring-shaped limit block is coaxially arranged, the outer peripheral side wall of the shading net abuts against the inner peripheral side wall of the limit block, and the upper surface of the top cover abuts against the lower surface of the bottom shell.

[0012] The utility model discloses a smoke alarm with a split-type maze structure, wherein a positioning block is arranged on the inner peripheral side wall of the first mounting hole, and a second positioning groove is arranged on the upper surface of the mounting base corresponding to the positioning block.

[0013] The utility model discloses a smoke alarm with a split-type maze structure, wherein the smoke sensor comprises a transmitting end and a receiving end; the upper surface of the mounting base is provided with two receiving grooves; the two receiving grooves are relatively inclined and arranged in an eight-shaped shape, and the transmitting end and the receiving end are respectively arranged in the two receiving grooves.

[0014] The utility model discloses a smoke alarm with a split-type maze structure, wherein the inclined bottom surface of the containing groove is provided with multiple steps from bottom to top.

[0015] The utility model discloses a smoke alarm with a split-type maze structure, wherein a key cap is arranged on the lower surface of a face shell, a circuit board is arranged inside the face shell, buttons are arranged on the surface of the circuit board facing the key cap, and the key cap is arranged directly below the button.

[0016] The beneficial effects of the utility model are as follows: the maze assembly and the mounting base of the maze of the utility model adopt a split structure, in the maze assembly, the top cover is positioned with the bottom plate by a positioning rod arranged on its lower surface, a first mounting hole is arranged on the bottom plate, and a positioning block arranged on the inner peripheral side wall of the first mounting hole extends into a second positioning groove on the upper surface of the mounting base, so that the maze assembly and the mounting base are positioned; during injection molding, the top cover, the bottom plate and the mounting base are respectively injection molded using different molds, which makes the injection molding and demoulding steps easier to operate, reduces the processing cost of the mold, reduces the difficulty of operation during the injection molding process, and is convenient for enterprises to control labor and production costs.

[0017] When the utility model is needed to work, the mounting piece and the positioning piece on the bracket are respectively extended into the positioning hole and the second mounting groove, and rotated clockwise until a click sound is heard. At this time, when the button on the lower surface of the face shell is long pressed, the utility model starts to work; the transmitting end and the receiving end of the smoke sensor are relatively arranged in the accommodating groove of the mounting base. When there is no smoke in the maze assembly, the light emitted by the transmitting end cannot be received by the receiving end, and the smoke alarm will not generate an alarm. When smoke from the outside enters the interior of the maze assembly through the gaps between multiple maze partitions, the light beam emitted by the transmitting end is diffused to various corners of the maze assembly by particles in the smoke. After the receiving end receives a beam of light reflected by the smoke particles, the buzzer on the circuit board sounds an alarm; when the utility model is not needed to work, the smoke alarm body is twisted counterclockwise relative to the bracket. At this time, even if the button is long pressed, the smoke alarm will not start to work. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work:

[0019] Figure 1 It is an exploded view of the utility model of a smoke alarm with a split-type maze structure.

[0020] Figure 2 It is a bottom view of a bracket in a smoke alarm with a split-type maze structure according to the utility model.

[0021] Figure 3 It is a top view of the bottom shell of the smoke alarm with a split maze structure of the utility model.

[0022] Figure 4 It is a bottom view of a bracket in a smoke alarm with a split-type maze structure according to the utility model.

[0023] Figure 5It is a bottom view of the utility model of a smoke alarm with a split-type maze structure.

[0024] Figure 6 yes Figure 5 AA section view.

[0025] Figure 7 yes Figure 6 Enlarged view of point B in the middle. DETAILED DESCRIPTION

[0026] The terms "first", "second", "third" and "fourth" etc. in the specification and claims of the present invention and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0027] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] "Multiple" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0029] Moreover, the terms "up, down, left, right, upper end, lower end, longitudinal" and the like indicating directions are all based on the posture and position of the device or equipment described in this solution during normal use.

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the following will be combined with the technical solution in the embodiments of the utility model for a clear and complete description. Obviously, the described embodiments are partial embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0031] The smoke alarm with a split maze structure in a preferred embodiment of the utility model is as follows: Figure 1-7 As shown, it includes a smoke alarm body 100, a labyrinth assembly 200, and a mounting base 300 for mounting a smoke sensor 600; the smoke alarm body 100 includes a bottom shell 101 and a front shell 102; a working chamber is arranged between the bottom shell 101 and the front shell 102, and the labyrinth assembly 200 is arranged in the working chamber; the labyrinth assembly 200 includes a top cover 201, a plurality of labyrinth partitions 202 vertically arranged on the lower surface of the top cover 201, and a bottom plate 203 with a first mounting groove 2031 on the upper surface; the plurality of labyrinth partitions 202 are distributed in a ring shape, the lower ends of the labyrinth partitions 202 are arranged in the first mounting groove 2031, the bottom surface of the first mounting groove 2031 is penetrated by a first mounting hole 2032 adapted to the mounting base 300, and the bottom plate 203 is detachably connected to the mounting base 300.

[0032] In the present embodiment, the maze assembly and the mounting base of the maze of the utility model adopt a split structure. In the maze assembly, the top cover is positioned together with the bottom plate by a positioning rod arranged on its lower surface. A first mounting hole is arranged on the bottom plate. The positioning block arranged on the inner peripheral side wall of the first mounting hole extends into the second positioning groove on the upper surface of the mounting base, so that the maze assembly and the mounting base are positioned. During injection molding, different molds are used for injection molding of the top cover, the bottom plate and the mounting base, respectively, so that the injection molding and demolding steps are easier to operate, the processing cost of the mold is reduced, the operation difficulty during the injection molding process is reduced, and it is convenient for enterprises to control labor and production costs.

[0033] When the utility model is needed to work, the mounting piece and the positioning piece on the bracket are respectively extended into the positioning hole and the second mounting groove. The upper surface of the bottom shell is also provided with a U-shaped second mounting hole 1011. The second mounting groove is provided between the two longitudinal ends of the second mounting hole 1011 and is not connected with the second mounting hole 1011. When the smoke alarm body is rotated clockwise relative to the bracket, the positioning piece is inserted into the second mounting groove, causing the suspended portion between the second mounting hole 1011 and the second mounting groove to undergo elastic deformation. The rotation is continued until a crisp sound is emitted, indicating that the installation of the bracket and the smoke alarm body is completed. At this time, when the button on the lower surface of the face shell is long pressed, the smoke alarm is turned on. The smoke alarm starts to work; the transmitting end and the receiving end of the smoke sensor are arranged relatively in the receiving groove of the mounting base. When there is no smoke in the maze assembly, the light emitted by the transmitting end cannot be received by the receiving end, and the smoke alarm will not generate an alarm. When smoke from the outside enters the interior of the maze assembly through the gaps between the multiple maze partitions, the light beam emitted by the transmitting end is diffused to various corners of the maze assembly by the particles in the smoke. After the receiving end receives a certain beam of light reflected by the smoke particles, the buzzer on the circuit board sounds an alarm; when the utility model is not needed to work, the smoke alarm body is twisted counterclockwise relative to the bracket. At this time, even if the button is long pressed, the smoke alarm will not start working.

[0034] Preferably, a bracket (500) detachably connected thereto and having a circular shape is provided at the upper end of the bottom shell (101), a connecting mechanism is provided between the bracket (500) and the bottom shell (101), an upper surface of the bracket 500 is used for pasting EVA double-sided tape, the EAV double-sided tape is used for pasting and fixing the bracket 500 on the wall, the connecting mechanism is used to fix the bracket 500 and the smoke alarm body 100, and a second U-shaped mounting hole 1011 is further provided on the upper surface of the bottom shell, the second mounting groove is provided between the two longitudinal ends of the second mounting hole 1011 and is not connected to the second mounting hole 1011, when the smoke alarm body is rotated clockwise relative to the bracket, the positioning piece is snapped into the second mounting groove, causing the suspended portion between the second mounting hole 1011 and the second mounting groove to undergo elastic deformation, and the rotation is continued until a snapping sound is emitted, indicating that the installation of the bracket and the smoke alarm body is completed.

[0035] Preferably, the connecting mechanism includes an L-shaped mounting member 703 vertically arranged on the lower surface of the bracket 500; the lateral end of the mounting member 703 is arranged in a counterclockwise direction coaxial with the bracket 500, and a positioning groove 707 is vertically arranged on the outward surface of the lateral end, and a positioning hole 705 for the mounting member 703 to extend into is arranged on the upper surface of the bottom shell 101, and the lateral end extends below the lower surface of the bottom shell 101, and the lower surface of the bottom shell 101 is also provided with a positioning hole 705. A mounting block 709 is provided which fits with the lateral end, and a positioning protrusion 708 which is inserted into the positioning groove 707 is provided on the surface of the mounting block 709 which contacts the lateral end, corresponding to the positioning groove 707. The lateral end of the mounting member 703 extends into the lower surface of the bottom shell 101 and hooks the bottom shell 101, so that the smoke alarm body 100 is fixed on the bracket 500 and does not fall. The positioning protrusion 708 is inserted into the positioning groove 707 to obtain circumferential fixation between the bracket 500 and the bottom shell 101.

[0036] Preferably, a long strip-shaped positioning piece 704 is horizontally arranged on the lower surface of the bracket 500; one end of the positioning piece 704 is fixed on the lower surface of the bracket 500, and the other end is arranged in a clockwise direction coaxial with the bracket 500, and a second mounting groove 706 is arranged on the upper surface of the bottom shell 101 corresponding to the positioning piece, and the length of the second mounting groove 706 is longer than the length of the positioning piece 704, and the positioning piece 704 is arranged in the second mounting groove 706, and the outer peripheral side wall of the positioning piece 704 is abutted against the inner peripheral side wall of the second mounting groove 706, and the positioning piece 704 prevents circumferential displacement between the bracket 500 and the bottom shell 101.

[0037] Preferably, three positioning rods 2011 are vertically arranged on the lower surface of the top cover 201, and the three positioning rods 2011 are distributed in a triangle. The upper surface of the bottom plate 203 is provided with a first positioning groove 2033 corresponding to the positioning rods 2011, so that the top cover 201 does not undergo relative displacement with respect to the bottom plate 203.

[0038] Preferably, a shading net 204 is provided on the outside of the annular structure composed of the multiple maze partitions 202, the bottom surface of the first mounting groove is circular and a ring-shaped limit block 205 is coaxially arranged, the outer peripheral side wall of the shading net 204 is abutted against the inner peripheral side wall of the limit block 205, the upper surface of the top cover 201 is abutted against the lower surface of the bottom shell 101, and the shading net 204 is used to prevent external light, flying insects, fine dust and the like from entering the interior of the maze assembly 200 to affect the normal operation of the smoke sensor 600, and prevent the utility model from making a false alarm when there is no smoke.

[0039] Preferably, a positioning block 2034 is provided on the inner side wall of the first mounting hole 2032, and a second positioning groove 301 is provided on the upper surface of the mounting base 300 corresponding to the positioning block 2034. After the positioning block 2034 extends into the second positioning groove 301, the maze assembly 200 can be prevented from relative displacement with respect to the mounting base 300.

[0040] Preferably, the smoke sensor 600 includes a transmitting end 601 and a receiving end 602; two receiving grooves 302 are provided on the upper surface of the mounting base 300; the two receiving grooves 302 are relatively inclined and arranged in an eight-shaped shape, and the transmitting end 601 and the receiving end 602 are respectively arranged in the two receiving grooves 302, so that when no smoke enters the interior of the maze assembly 200, the receiving end 602 will not receive the light emitted by the transmitting end 601, thereby preventing false alarms.

[0041] Preferably, the inclined bottom surface of the accommodating groove 302 is provided with multiple steps 3021 from bottom to top. After smoke enters the maze assembly, the light emitted by the transmitting end 601 and the light diffusely reflected by the smoke particles can generate reflected light at more angles through the steps 3021, thereby increasing the probability of the receiving end 602 receiving the reflected light and improving the sensitivity of the smoke sensor 600 in detecting smoke.

[0042] Preferably, a keycap 103 is provided on the lower surface of the surface shell 102, a circuit board 104 is provided inside the surface shell 102, a button 105 is provided on the surface of the circuit board 104 facing the keycap 103, and the keycap 103 is arranged directly below the button 10, so as to control the working state of the utility model according to the user's wishes.

[0043] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

Claims

1. A smoke alarm with a split maze structure, characterized in that: The invention comprises a smoke alarm body (100), a labyrinth assembly (200), and a mounting base (300) for mounting a smoke sensor (600); the smoke alarm body (100) comprises a bottom shell (101) and a front shell (102); a working cavity is arranged between the bottom shell (101) and the front shell (102), and the labyrinth assembly (200) is arranged in the working cavity; the labyrinth assembly (200) comprises a top cover (201), a plurality of vertically arranged The invention relates to a labyrinth partition (202), and a bottom plate (203) whose upper surface is provided with a first mounting groove (2031); the plurality of labyrinth partitions (202) are distributed in a ring shape, the lower end of the labyrinth partition (202) is arranged in the first mounting groove (2031), the bottom surface of the first mounting groove (2031) is penetrated by a first mounting hole (2032) adapted to the mounting base (300), and the bottom plate (203) is detachably connected to the mounting base (300).

2. The smoke alarm with a split maze structure according to claim 1, characterized in that: The upper end of the bottom shell (101) is provided with a circular bracket (500) which is detachably connected thereto, and a connecting mechanism is provided between the bracket (500) and the bottom shell (101).

3. The smoke alarm with a split maze structure according to claim 2, characterized in that: The connection mechanism comprises an L-shaped mounting member (703) vertically arranged on the lower surface of the bracket (500); the lateral end of the mounting member (703) is arranged in a counterclockwise direction coaxial with the bracket (500); a positioning groove (707) is vertically arranged on the outward surface of the lateral end; a positioning hole (705) for the mounting member (703) to extend into is arranged on the upper surface of the bottom shell (101); the lateral end extends below the lower surface of the bottom shell (101); a mounting block (709) abutting against the lateral end is also arranged on the lower surface of the bottom shell (101); and a positioning protrusion (708) corresponding to the positioning groove (707) and snapping into the positioning groove (707) is arranged on the surface of the mounting block (709) contacting the lateral end.

4. The smoke alarm with a split maze structure according to claim 3, characterized in that: A long strip-shaped positioning piece (704) is also horizontally arranged on the lower surface of the bracket; one end of the positioning piece (704) is fixed on the lower surface of the bracket (500), and the other end is arranged in a clockwise direction coaxial with the bracket (500); a second mounting groove (706) is arranged on the upper surface of the bottom shell (101) corresponding to the positioning piece; the length of the second mounting groove (706) is longer than the length of the positioning piece (704); the positioning piece (704) is arranged in the second mounting groove (706), and the outer peripheral side wall of the positioning piece (704) is abutted against the inner peripheral side wall of the second mounting groove (706).

5. The smoke alarm with a split maze structure according to claim 1, characterized in that: Three positioning rods (2011) are vertically arranged on the lower surface of the top cover (201), and the three positioning rods (2011) are distributed in a triangular shape. The upper surface of the bottom plate (203) is provided with first positioning grooves (2033) corresponding to the positioning rods (2011).

6. The smoke alarm with a split maze structure according to claim 1, characterized in that: A shading net (204) is sleeved on the outside of the annular structure composed of a plurality of the labyrinth partitions (202); the bottom surface of the first installation groove is circular and is coaxially provided with an annular limiting block (205); the outer peripheral side wall of the shading net (204) abuts against the inner peripheral side wall of the limiting block (205); and the upper surface of the top cover (201) abuts against the lower surface of the bottom shell (101).

7. The smoke alarm with a split-type maze structure according to claim 6, characterized in that: A positioning block (2034) is provided on the inner peripheral side wall of the first mounting hole (2032), and a second positioning groove (301) is provided on the upper surface of the mounting base (300) corresponding to the positioning block (2034).

8. The smoke alarm with a split maze structure according to claim 1, characterized in that: The smoke sensor (600) comprises a transmitting end (601) and a receiving end (602); the upper surface of the mounting base (300) is provided with two receiving grooves (302); the two receiving grooves (302) are arranged in an eight-shaped manner and are inclined relative to each other, and the transmitting end (601) and the receiving end (602) are respectively arranged in the two receiving grooves (302).

9. The smoke alarm with a split-type maze structure according to claim 8, characterized in that: The inclined bottom surface of the containing groove (302) is provided with multiple steps (3021) from bottom to top.

10. The smoke alarm with a split-type maze structure according to claim 1, characterized in that: A keycap (103) is provided on the lower surface of the surface shell (102), a circuit board (104) is provided inside the surface shell (102), a button (105) is provided on the surface of the circuit board (104) facing the keycap (103), and the keycap (103) is provided directly below the button (105).

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