Bottom cover and circuit board separated smoke detector

Abstract

The utility model discloses a smoke detector with a separated bottom cover and circuit board. The smoke detector comprises a detector box body, a key cover, a smoke detection circuit, a circuit board, a supporting assembly and a bottom cover, the detection box body is of a cover-shaped structure, a supporting assembly is arranged in the detection box body, a circuit board located in the detector box body is installed on the supporting assembly, a smoke sensing detection circuit is installed on the circuit board, a vent hole is formed in the detection box body, and the outside is communicated with the smoke sensing detection circuit through the vent hole; a key cover is mounted in the middle of the detection box body and is aligned with a switch key in the smoke detection circuit, one side of the key cover is fixed with the detection box body, and a pressing gap is formed between the other side of the key cover and the detection box body; the bottom of the detection box is sealed by a bottom cover. The smoke detector with the separated bottom cover and circuit board solves the problem that the key cover and the shell cover are separately produced during mold manufacturing in the prior art.

Description

Technical Field

[0001] The utility model relates to a smoke detector, in particular to a bottom cover circuit board separated type smoke detector. Background Art

[0002] A Chinese patent discloses a smoke detector with a communicator with an application number of CN202121135612.3, and the smoke detector with a communicator includes: a shell, a shell cover, a bottom box, a bottom cover, an arched cover, a communication circuit board, a communication battery, a smoke circuit board and a smoke battery; a bottom box is installed on the side of the shell away from the shell cover, two first corner positioning mechanisms are installed on the bottom box, the communication circuit board is installed between the two first corner positioning mechanisms, and first limit release hooks are installed on both sides of the communication circuit board. The first limit release hooks are elastic and limit the movement of the communication circuit board relative to the bottom box; the side of the bottom box away from the shell is recessed toward the shell to form an arched cover, a communication battery is installed in the arched cover, the communication battery supplies power for the communication circuit board, the first limit release hook passes through the bottom box, the first limit release hook is located on one side of the arched cover, and the first limit release hook limits the communication battery from being separated from the arched cover; the bottom box is covered with a bottom cover on the side away from the shell.

[0003] Although the smoke detector with a communicator can solve the problem in the prior art that the communicator cannot be separated from the shell, the smoke detector with a communicator still has the following disadvantages: since a large circular hole is opened on the shell cover, a movable button cover is installed in the circular hole, and the button cover and the shell cover are produced separately during mold making. Since the area of ​​the button cover is too large, it can only be produced separately, resulting in reduced production efficiency. Utility Model Content

[0004] The utility model provides a bottom cover circuit board separated type smoke detector, which solves the problem in the prior art that a button cover and a shell cover are produced separately during mold making.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model discloses a bottom cover circuit board separated type smoke detector, comprising: a detector box body, a button cover, a smoke detection circuit, a circuit board, a support assembly and a bottom cover; the detection box body is a cover-shaped structure, the detection box body is provided with a support assembly, a circuit board located in the detector box body is mounted on the support assembly, the circuit board is mounted with a smoke detection circuit, the detection box body is provided with an air vent, the air vent connects the outside with the smoke detection circuit; a button cover is installed in the middle of the detection box body, the button cover is aligned with a switch button in the smoke detection circuit, one side of the button cover is fixed to the detection box body, and a pressing gap is formed between the other side of the button cover and the detection box body; the bottom of the detection box body is closed by the bottom cover.

[0007] Preferably, the support assembly includes: a support column and at least three edge support blocks, the edge support blocks are fixed to the inner wall of the detection box body, the edge support blocks are formed with a support surface and a side positioning surface, the support surface is perpendicular to the side positioning surface, the support surface supports the edge of the circuit board, the side positioning surface is in close contact with the side of the circuit board, and the support column supports the circuit board.

[0008] Preferably, a support and positioning seat is installed in the detection box body, the support and positioning seat is detachably connected to the circuit board, and the support and positioning seat is located beside the button cover.

[0009] Preferably, the supporting positioning seat includes: a connecting tube and supporting ribs, the connecting tube is fixed to the inner wall of the detection box body, at least two supporting ribs are surrounded by the outside of the connecting tube, the supporting ribs support the circuit board, the connecting tube is inserted into the circuit board, the connecting tube is threadedly connected with a screw, and the large end of the screw presses the circuit board against the supporting ribs.

[0010] Preferably, the button cover comprises: a push block, a push column and reinforcing ribs, one side of the push block is fixed to the detection box body, the push block is fixed with a push column located in the detection box body, and at least two reinforcing ribs surround the push column.

[0011] Preferably, the detection box body forms a surrounding edge, the bottom cover protrudes to form an insertion step, the insertion step extends into the surrounding edge, and the detection box body is snap-connected with the bottom cover.

[0012] Preferably, the corner protrusion extending into the step forms a snap seat, and the inner wall of the detection box body protrudes to form a snap projection, and the snap projection is snap-fitted with the snap seat.

[0013] Preferably, a closing plate is installed on the side of the bottom cover facing away from the detection box body, and the closing plate is snap-fitted with the bottom cover.

[0014] Preferably, the bottom cover is provided with a buckle groove, and a buckle foot is protruded on the closing plate, and the buckle foot extends into the buckle groove, and the buckle foot is buckled with the buckle groove wall.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] In the present application, the circuit board is installed in the detection box body, and the circuit board is no longer installed on the bottom cover, so that the bottom cover and the circuit board are installed separately, and the bottom cover only plays the role of closing the detection box body. Then, the key cover is designed to be still in the center of the detection box body, but the key cover is fixed to the detection box body on one side and separated from the detection box body on the other side, so as to form a pressing gap between the key cover and the detection box body, and the pressing gap is a superior arc structure, and the fixing point of the key cover and the detection box body is a inferior arc structure. The elasticity of the fixing point of the key cover and the detection box body enables the key cover to act on the key on the circuit board after being pressed, thereby realizing that the key cover is covered outside the key, and the key cover can act on the key of the circuit board after being pressed, and the key cover can be formed together when the detection box body is formed in the mold, and it is no longer necessary to connect the key cover or the key in the future, thereby ensuring that the function of the key cover can be realized, and ensuring that the key cover can be made together with the detection box body, simplifying the production steps, improving production efficiency, and more in line with modern production needs.

[0017] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a smoke detector with a separate bottom cover and circuit board.

[0019] Figure 2 This is an exploded view of a smoke detector with a separated bottom cover circuit board.

[0020] Figure 3 This is a schematic diagram of the structure of the detection box in a smoke detector with a separate bottom cover and circuit board.

[0021] Figure 4 This is a schematic diagram of the structure of the bottom cover and the closing plate in a smoke detector with a separated bottom cover and circuit board.

[0022] Figure numerals: detector box body 1, surrounding edge 10, latch 11, button cover 2, push block 21, push column 22, reinforcing rib 23, support assembly 3, support column 31, edge support block 32, support positioning seat 33, connecting tube 331, support rib 332, bottom cover 4, extension step 40, snap seat 41, snap groove 42, closing plate 5, snap foot 50. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and functions of the present invention clearer and easier to understand, the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods:

[0024] like Figures 1 to 4 As shown, the utility model discloses a bottom cover 4 circuit board separated type smoke detector, comprising: a detector box body 1, a button cover 2, a smoke detection circuit (not shown in the figure), a circuit board (not shown in the figure), a support assembly 3 and a bottom cover 4; the detection box body is a cover-shaped structure, the detection box body is provided with a support assembly 3, the support assembly 3 is mounted with a circuit board located in the detector box body 1, the circuit board is mounted with a smoke detection circuit, the detection box body is provided with an air vent, the air vent connects the outside with the smoke detection circuit; a button cover 2 is installed in the middle of the detection box body, the button cover 2 is aligned with the switch button in the smoke detection circuit, one side of the button cover 2 is fixed to the detection box body, and a pressing gap is formed between the other side of the button cover 2 and the detection box body; the bottom of the detection box body is closed by the bottom cover 4.

[0025] The support assembly 3 includes: a support column 31 and at least three edge support blocks 32. The edge support blocks 32 are fixed to the inner wall of the detection box body. The edge support blocks 32 are formed with a support surface and a side positioning surface. The support surface is perpendicular to the side positioning surface. The support surface supports the edge of the circuit board. The side positioning surface is in close contact with the side of the circuit board. The support column 31 supports the circuit board. The circuit board is fully supported. The circuit board can be welded on the support assembly 3 by bonding or other methods. After the support assembly 3 supports the circuit board, the side positioning surface is used to position the circuit board to prevent the circuit board from shaking randomly in the detection box body, thereby ensuring the stability of the circuit board after installation.

[0026] A support and positioning seat 33 is installed in the detection box body, and the support and positioning seat 33 is detachably connected to the circuit board. The support and positioning seat 33 is located next to the key cover 2. Since the circuit board is installed on the support component 3, there is a distance between the circuit board and the bottom cover 4, so that the circuit board can be suspended in the detection box body, and after the air is taken in, the gas can fully contact the smoke sensor on the circuit board. However, when the button is pressed, the pressure on the circuit board is relatively large, so that the circuit board tends to separate from the support component 3. If the support and positioning seat 33 is not installed next to the key cover 2, it is very easy to cause the circuit board to deform, and even the circuit board and the support and positioning seat 33 may separate. In this application, the support and positioning seat 33 is used to connect the circuit board. After the support and positioning seat 33 is connected to the circuit board, when the key cover 2 is pressed, the circuit board is not easy to deform because it is fully supported by the support and positioning seat 33.

[0027] The support and positioning seat 33 includes: a connecting tube 331 and supporting ribs 332. The connecting tube 331 is fixed to the inner wall of the detection box body. At least two supporting ribs 332 surround the connecting tube 331. The supporting ribs 332 support the circuit board. The connecting tube 331 is inserted into the circuit board. The connecting tube 331 is threadedly connected with a screw. The large end of the screw presses the circuit board against the supporting ribs 332. The connecting tube 331 extends into the circuit board to position the circuit board. At the same time, the screw connected to the connecting tube 331 cooperates with the supporting ribs 332 to clamp the circuit board, thereby realizing that the circuit board is stably installed on the support assembly 3.

[0028] The button cover 2 includes: a push block 21, a push column 22 and a reinforcing rib 23. One side of the push block 21 is fixed to the detection box body. The push block 21 is fixed with a push column 22 located in the detection box body. The push column 22 is surrounded by at least two reinforcing ribs 23. The push block 21 realizes the connection with the detection box body, and the fixed connection is a sheet-like structure. The fixed connection is elastic. The push block 21 can be pressed and can also be reset under the elastic action of the fixed connection. The push column 22 is used to realize the extrusion of the push block 21 and the button. The reinforcing rib 23 is used to ensure the reliability of the connection between the push column 22 and the push block 21.

[0029] The detection box body forms a surrounding edge 10, and the bottom cover 4 protrudes to form an insertion step 40, which is inserted into the surrounding edge 10, and the detection box body is snap-connected with the bottom cover 4. The surrounding edge 10 and the insertion step 40 cooperate to achieve a small gap between the detection box body and the bottom cover 4 after being snapped together, and there can be almost no gap.

[0030] The corners extending into the step 40 protrude to form a buckle seat 41, and the inner wall of the detection box body protrudes to form a buckle 11, and the buckle 11 is buckled with the buckle seat 41 to achieve the connection between the detection box body and the bottom cover 4.

[0031] A closing plate 5 is installed on the side of the bottom cover 4 away from the detection box body, and the closing plate 5 is snap-fitted with the bottom cover 4. The bottom cover 4 is provided with an opening, etc., and also with an installation position for an electronic battery, and the closing plate 5 is used to close the installation position for the electronic battery and the opening, etc.

[0032] The bottom cover 4 is provided with a buckle groove 42, and a buckle foot 50 is formed on the closing plate 5. The buckle foot 50 extends into the buckle groove 42, and the buckle foot 50 is buckled with the wall of the buckle groove 42.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A smoke detector with a bottom cover (4) and a circuit board separated therefrom, characterized in that: include: A detector box body (1), a button cover (2), a smoke detection circuit, a circuit board, a support component (3) and a bottom cover (4); The detection box body is a cover-shaped structure, a support assembly (3) is arranged in the detection box body, a circuit board located in the detector box body (1) is mounted on the support assembly (3), a smoke detection circuit is mounted on the circuit board, and an air vent is provided in the detection box body, the air vent connects the outside world with the smoke detection circuit; A button cover (2) is installed in the middle of the detection box body, the button cover (2) is aligned with the switch button in the smoke detection circuit, one side of the button cover (2) is fixed to the detection box body, and a pressing gap is formed between the other side of the button cover (2) and the detection box body; The bottom of the detection box body is closed by a bottom cover (4).

2. The bottom cover (4) circuit board separated type smoke detector according to claim 1, characterized in that: The support assembly (3) comprises: a support column (31) and at least three edge support blocks (32), the edge support blocks (32) being fixed to the inner wall of the detection box body, the edge support blocks (32) being formed with a support surface and a side positioning surface, the support surface being perpendicular to the side positioning surface, the support surface supporting the edge of the circuit board, the side positioning surface being in close contact with the side surface of the circuit board, and the support column (31) supporting the circuit board.

3. The bottom cover (4) circuit board separated type smoke detector according to claim 2, characterized in that: A support and positioning seat (33) is installed in the detection box body. The support and positioning seat (33) is detachably connected to the circuit board. The support and positioning seat (33) is located beside the key cover (2).

4. The bottom cover (4) circuit board separated type smoke detector according to claim 3, characterized in that: The support and positioning seat (33) comprises: a connecting tube (331) and supporting ribs (332); the connecting tube (331) is fixed to the inner wall of the detection box body; at least two supporting ribs (332) surround the connecting tube (331); the supporting ribs (332) support the circuit board; the connecting tube (331) is inserted into the circuit board; the connecting tube (331) is threadedly connected with a screw; the large end of the screw presses the circuit board onto the supporting ribs (332).

5. The bottom cover (4) circuit board separated type smoke detector according to claim 4, characterized in that: The button cover (2) comprises: a push block (21), a push column (22) and a reinforcing rib (23); one side of the push block (21) is fixed to a detection box body; the push block (21) is fixed with a push column (22) located in the detection box body; and at least two reinforcing ribs (23) surround the push column (22).

6. The bottom cover (4) circuit board separated type smoke detector according to claim 1, characterized in that: The detection box body forms a surrounding edge (10), the bottom cover (4) protrudes to form an insertion step (40), the insertion step (40) extends into the surrounding edge (10), and the detection box body and the bottom cover (4) are snap-connected.

7. The bottom cover (4) circuit board separated type smoke detector according to claim 6, characterized in that: The corner protruding into the step (40) forms a buckle seat (41), and the inner wall of the detection box body protrudes to form a buckle protrusion (11), and the buckle protrusion (11) is buckled with the buckle seat (41).

8. The bottom cover (4) circuit board separated type smoke detector according to claim 7, characterized in that: A closing plate (5) is installed on the side of the bottom cover (4) facing away from the detection box body, and the closing plate (5) is snap-fitted with the bottom cover (4).

9. The bottom cover (4) circuit board separated type smoke detector according to claim 8, characterized in that: The bottom cover (4) is provided with a buckle groove (42), and a buckle foot (50) is protruded from the closing plate (5), and the buckle foot (50) extends into the buckle groove (42), and the buckle foot (50) is buckled with the wall of the buckle groove (42).

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