Smoke alarm grounding structure

Abstract

The utility model discloses a smoke alarm grounding structure comprising a circuit mainboard and a communication mainboard, the circuit mainboard is electrically connected with a communication jack, and the communication mainboard is electrically connected with a communication pin matched with the communication jack; a metal clip and a metal insertion sheet, the metal clip is electrically connected to the circuit mainboard, the metal insertion sheet is electrically connected to the communication mainboard, and the metal insertion sheet can be inserted into the metal clip; according to the utility model, the problem that the two main boards of the smoke alarm are grounded through conductive sponge or metal screws, but the distance between the two main boards needs to be increased, which is not beneficial to miniaturization of the smoke alarm can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of smoke alarms, and particularly relates to a grounding structure of a smoke alarm. Background Art

[0002] A smoke alarm has a circuit main board and a communication main board. Generally, the two are grounded through a conductive sponge and metal screws to achieve stable transmission of the signal of the communication main board. However, when using the conductive sponge for connection, since the area occupied by the conductive sponge is larger than the area of the circuit main board, this leads to an increase in the design height difference between the circuit main board and the communication main board. And when using metal screws for grounding, multiple holes need to be drilled on the circuit main board for connection, which also requires a large area. The methods of grounding the circuit main board and the communication main board using a conductive sponge and metal screws both require an increase in the distance between the two, which is not conducive to the miniaturization of the smoke alarm and reduces the applicable range of the smoke alarm. Summary of the Utility Model

[0003] To overcome the above drawbacks, the purpose of the utility model is to provide a grounding structure of a smoke alarm.

[0004] To achieve the above purpose, the technical solutions adopted by the utility model include:

[0005] A circuit main board and a communication main board, a communication socket is electrically connected to the circuit main board, and a communication pin adapted to the communication socket is electrically connected to the communication main board;

[0006] A metal clip and a metal insert, the metal clip is electrically connected to the circuit main board, the metal insert is electrically connected to the communication main board, and the metal insert can be inserted into the metal clip.

[0007] In the preferred technical solution of the above grounding structure of the smoke alarm, the circuit main board is arranged in a first housing, a plug hole and a plug slot are formed on the first housing, the plug hole corresponds to the position of the communication socket, and the plug slot corresponds to the position of the metal clip.

[0008] In the preferred technical solution of the above grounding structure of the smoke alarm, the metal insert has a connecting portion and a plugging portion, and at least one through hole is formed in the connecting portion.

[0009] In the preferred technical solution of the above grounding structure of the smoke alarm, the connecting portion of the metal insert has pins, through holes are formed on the communication main board, and the pins of the metal insert are clamped in the through holes of the communication main board.

[0010] In the preferred technical solution of the above-mentioned grounding structure of the smoke alarm, symmetric first bending parts and second bending parts are formed on the metal clip, and a gap for inserting the metal insert is formed between the first bending part and the second bending part.

[0011] In the preferred technical solution of the above-mentioned grounding structure of the smoke alarm, the communication main board is arranged in the second housing, and the second housing is fixedly connected to the first housing by snap connection.

[0012] In the preferred technical solution of the above-mentioned grounding structure of the smoke alarm, the metal clip is made of copper or aluminum.

[0013] In the preferred technical solution of the above-mentioned grounding structure of the smoke alarm, the metal insert is made of copper or aluminum.

[0014] In the preferred technical solution of the above-mentioned grounding structure of the smoke alarm, the metal insert is soldered to the communication main board.

[0015] In the preferred technical solution of the above-mentioned grounding structure of the smoke alarm, the thickness of the metal insert is 0.1 - 2 mm.

[0016] The beneficial effect of the present utility model is that by installing a metal clip on the circuit main board and a metal insert on the communication main board, the metal insert can be inserted into the metal clip. By changing the height of the metal insert, the distance between the communication main board and the circuit main board can be adjusted adaptively, ensuring the miniaturization setting of the smoke alarm. Description of the Drawings

[0017] Figure 1 The first schematic diagram of the connection relationship between the communication main board and the metal insert;

[0018] Figure 2 The second schematic diagram of the connection relationship between the communication main board and the metal insert;

[0019] Figure 3 The schematic diagram of the structure of the metal insert;

[0020] Figure 4 The schematic diagram of the structure of the circuit main board and the metal clip;

[0021] Figure 5 For Figure 4 The partial enlarged view at A in

[0022] Figure 6 The top view of the first housing;

[0023] In the figure:

[0024] Circuit main board 1, communication socket 11, metal clip 12, first bending part 121, second bending part 122;

[0025] Communication main board 2, communication pin 21, metal insert 22, connecting part 221, plugging part 222, perforation 223, pin 224;

[0026] First housing 3, plugging hole 31, plugging groove 32. Specific embodiments

[0027] The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present utility model and are not intended to limit the protection scope of the present utility model.

[0028] It should be noted that in the description of the present utility model, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In addition, it should also be noted that in the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0030] Based on the problem pointed out in the background technology that the two main boards of the smoke alarm are grounded by using a conductive sponge or metal screws, but both require increasing the distance between the two main boards, which is not conducive to the miniaturization of the smoke alarm. The present utility model provides a grounding structure for a smoke alarm, aiming to install a metal clip 12 on the circuit main board 1 and a metal insert 22 on the communication main board 2. The metal insert 22 can be inserted into the metal clip 12. By changing the height of the metal insert 22, the distance between the communication main board 2 and the circuit main board 1 can be adjusted adaptively, ensuring the miniaturization setting of the smoke alarm.

[0031] As Figures 1 to 6 shown, the grounding structure of the smoke alarm of the present utility model includes: a circuit main board 1 and a communication main board 2. A communication socket 11 is electrically connected to the circuit main board 1, and a communication pin 21 adapted to the communication socket 11 is electrically connected to the communication main board 2; a metal clip 12 and a metal insert 22. The metal clip 12 is electrically connected to the circuit main board 1, and the metal insert 22 is electrically connected to the communication main board 2. The metal insert 22 can be inserted into the metal clip 12.

[0032] See Figure 1 、 Figure 2 、 Figure 3 , the communication main board 2 is used to receive external signals and transmit the signals to the circuit main board 1. Among them, the communication pins 21 electrically connected to the communication main board 2 and the communication socket 11 electrically connected to the circuit main board 1 are the signal transmission paths.

[0033] See Figure 4 , the metal clip 12 is electrically connected to the circuit main board 1, and the circuit main board 1 functions as a ground through the metal clip 12, that is, the metal clip 12 itself is the ground. Correspondingly, the metal insert 22 is electrically connected to the communication main board 2, and the communication main board 2 functions as a ground through the metal insert 22, and the metal insert 22 itself is the ground. When the communication main board 2 and the circuit main board 1 are electrically connected through the communication pins 21 and the communication socket 11, the metal insert 22 can be inserted into the metal clip 12 to connect the ground of the communication main board 2 with the ground of the circuit main board 1, so as to further improve the signal transmission stability of the communication main board 2. At the same time, when it is necessary to further reduce the height difference between the communication main board 2 and the circuit main board 1, only the height of the metal insert 22 needs to be correspondingly reduced. Through this configuration, the miniaturization of the smoke alarm can be further ensured, and the applicable range of the smoke alarm of the present application can be improved.

[0034] In one or more embodiments, the circuit main board 1 is disposed in the first housing 3. The first housing 3 is formed with a plug hole 31 and a plug slot 32. The plug hole 31 corresponds to the position of the communication socket 11, and the plug slot 32 corresponds to the position of the metal clip 12; the communication main board 2 is disposed in the second housing, and the second housing is snap-fitted and fixed to the first housing 3.

[0035] See Figure 6 , the first housing 3 is formed with a sunk groove for the second housing to be placed in. A buckle is disposed in the sunk groove within the first housing 3, and a card slot is formed at the position of the second housing corresponding to the buckle. Through this setting, the connection between the first housing 3 and the second housing can be formed.

[0036] See Figure 6 , the plug hole 31 opened on the first housing 3 corresponds to the position of the communication socket 11 of the circuit main board 1, and the opened plug slot 32 corresponds to the position of the metal clip 12; through this setting, the metal insert 22 protruding from the second housing can pass through the plug slot 32 and be inserted into the metal clip 12, and the communication pins 21 can be inserted into the communication socket 11 through the plug slot 32, realizing the electrical connection between the circuit main board 1 and the communication main board 2, and at the same time realizing the mutual grounding of the circuit main board 1 and the communication main board 2, ensuring the connection stability of the circuit main board 1 and the communication main board 2.

[0037] In one or more embodiments, the metal insert 22 has a connecting portion 221 and a plugging portion 222, and at least one perforation 223 is formed in the connecting portion 221; the metal insert 22 is soldered to the communication main board 2.

[0038] See Figure 3 , the connecting portion 221 and the plugging portion 222 of the metal insert 22 are in an L-shaped structure. With this arrangement, the area of the connecting portion 221 in contact with the communication main board 2 can be increased, ensuring the stability of the metal insert 22 mounted on the communication main board 2.

[0039] See Figure 3 , the perforation 223 can be 1, 2, 5, 10, and the number of perforations 223 is not limited. By increasing the number of perforations 223, the weight of the metal insert 22 can be reduced, and then the overall weight of the smoke alarm can be reduced; at the same time, when connecting the metal insert 22 and the communication main board 2, the solder can enter the perforation 223, increasing the connection area between the metal insert 22 and the communication main board 2.

[0040] In one or more embodiments, the connecting portion 221 of the metal insert 22 has pins 224, through holes are formed on the communication main board 2, and the pins 224 of the metal insert 22 are clamped in the through holes of the communication main board 2.

[0041] See Figure 3 , by clamping the pins 224 of the metal insert 22 in the through holes on the communication main board 2, the connection strength between the metal insert 22 and the communication main board 2 can be further enhanced. At the same time, after the metal insert 22 is clamped on the communication main board 2, it is convenient for soldering the connecting portion 221 of the metal insert 22.

[0042] In one or more embodiments, symmetric first bending portions 121 and second bending portions 122 are formed on the metal clip 12, and a gap for inserting the metal insert 22 is formed between the first bending portion 121 and the second bending portion 122.

[0043] See Figure 5 , the first bending portion 121 and the second bending portion 122 have a certain elasticity, and the thickness of the metal insert 22 is greater than the gap formed between the first bending portion 121 and the second bending portion 122. With this arrangement, after the metal insert 22 is inserted into the gap formed on the metal clip 12, it can be clamped by the first bending portion 121 and the second bending portion 122, ensuring the grounding effect between the communication main board 2 and the circuit main board 1.

[0044] In one or more embodiments, the metal clip 12 is made of copper or aluminum. In a specific embodiment, the metal clip 12 is made of pure copper.

[0045] In one or more embodiments, the metal insert 22 is made of copper or aluminum. In a specific embodiment, the metal insert 22 is made of pure copper.

[0046] In one or more embodiments, the thickness of the metal insert 22 is 0.1 - 2 mm. It should be noted that the thickness of the metal insert 22 can be selected according to actual production needs.

[0047] The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it. It should not be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A smoke alarm grounding structure, characterized in that: include: A circuit main board and a communication main board, wherein the circuit main board is electrically connected to a communication socket, and the communication main board is electrically connected to a communication pin adapted to the communication socket; A metal clip and a metal insert, wherein the metal clip is electrically connected to the circuit main board, the metal insert is electrically connected to the communication main board, and the metal insert can be inserted into the metal clip.

2. The smoke alarm grounding structure according to claim 1, characterized in that: The circuit main board is arranged in a first shell, and a plug hole and a plug slot are formed on the first shell. The plug hole corresponds to the position of the communication socket, and the plug slot corresponds to the position of the metal clip.

3. The smoke alarm grounding structure according to claim 1, characterized in that: The metal insert has a connecting portion and an inserting portion, and the connecting portion is formed with at least one through hole.

4. The smoke alarm grounding structure according to claim 3, characterized in that: The connection portion of the metal insert has a pin, and a through hole is formed on the communication mainboard. The pin of the metal insert is clamped in the through hole of the communication mainboard.

5. The smoke alarm grounding structure according to claim 1, characterized in that: The metal clip is formed with a first bending portion and a second bending portion which are symmetrical, and a gap for inserting the metal insert is formed between the first bending portion and the second bending portion.

6. The smoke alarm grounding structure according to claim 2, characterized in that: The communication mainboard is arranged in a second shell, and the second shell is fixedly connected with the first shell.

7. The smoke alarm grounding structure according to claim 1, characterized in that: The metal clip is made of copper or aluminum.

8. The smoke alarm grounding structure according to claim 1, characterized in that: The metal insert is made of copper or aluminum.

9. The smoke alarm grounding structure according to claim 1, characterized in that: The metal insert is soldered to the communication mainboard.

10. The smoke alarm grounding structure according to claim 1, characterized in that: The thickness of the metal insert is 0.1-2 mm.

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