Manual fire alarm button and method of using the same

Abstract

The present invention relates to a manual fire alarm button and a method for using the same. The manual fire alarm button comprises an installation box, a pressing cover movably connected to the installation box, and a PCBA board located inside the installation box; the installation box is provided with a pressing groove corresponding to the pressing cover; the PCBA board comprises a CPU, a pair of transmitting tubes and receiving tubes, and a bare board fixed to the installation box; the CPU, the transmitting tube and the receiving tube are all fixed to the bare board; the transmitting tube and the receiving tube are both electrically connected to the CPU; the transmitting tube and the receiving tube are both facing the pressing cover; the position when the pressing cover is closest to the pressing groove is the first position, and the position when the pressing cover is farthest from the pressing groove is the second position; the pressing cover is provided with a reflection position for reflecting the light emitted by the transmitting tube to the receiving tube when in the first position and / or the second position. The improved manual fire alarm button has a simple structure, low cost, and low false alarm rate.

Description

Technical Field

[0001] The present invention relates to the technical field of buttons, and more particularly to a manual fire alarm button and a method for using the same. Background Art

[0002] When a fire occurs, on-site personnel can send a fire alarm signal to the fire alarm controller by pressing the manual fire alarm button to link the fire prevention and fire extinguishing facilities in the building; therefore, it is extremely important that the manual fire alarm button can transmit the fire alarm signal truthfully and accurately. At present, the use of manual fire alarm buttons is as follows:

[0003] First, a touch switch is used as a trigger. The active end of the touch switch is exposed to the air. However, dust, water vapor and salt in the environment will have a negative impact on the touch switch, especially in southern cities with humid climates. This is mainly because the positive and negative metal contacts of the touch switch are close to each other. When the air contains high water vapor and salt, air discharge is easily formed between the two contacts. Over time, the touch switch will be corroded and damaged, causing the manual fire alarm button to fail to function.

[0004] The second method is to use waterproof buttons, add silicone protective covers around the buttons, seal the trigger by wax sealing or compression, and make a larger shell to completely seal the PCBA board to ensure that the manual fire alarm button can continue to work normally. However, the above methods are costly, complicated to assemble, and have low production efficiency.

[0005] The third is to use infrared emitting tubes and infrared receiving tubes as switches. When the baffle separates the infrared emitting tubes and the infrared receiving tubes, the optical signal is interrupted and the alarm is triggered. In this way, if foreign objects (such as insects) enter, false alarms are likely to occur, causing confusion.

[0006] Therefore, in order to solve the above-mentioned shortcomings, it is still necessary to improve the existing manual fire alarm button. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a manual fire alarm button and a method for using the manual fire alarm button in view of the above-mentioned defects of the prior art.

[0008] The technical solution adopted by the present invention to solve its technical problem is:

[0009] On the one hand, a manual fire alarm button is provided, comprising an installation box, a pressing cover movably connected to the installation box, and a PCBA board located inside the installation box; the installation box is provided with a pressing groove corresponding to the pressing cover; the PCBA board comprises a CPU, a pair of transmitting tubes and receiving tubes,

[0010] A bare board fixed to the installation box; the CPU, the transmitting tube and the receiving tube are all fixed to the bare board; the transmitting tube and the receiving tube are both electrically connected to the CPU; wherein:

[0011] The transmitting tube and the receiving tube are both facing the pressing cover; the position when the pressing cover is closest to the pressing groove is the first position, and the position when the pressing cover is farthest from the pressing groove is the second position; the pressing cover is provided with a reflecting position for reflecting the light emitted by the transmitting tube toward the receiving tube when in the first position and / or the second position.

[0012] On the other hand, a method for using a manual fire alarm button is provided, based on the above-mentioned manual fire alarm button, which includes the following steps:

[0013] The CPU continuously obtains the intensity value of the optical signal received by the receiving tube;

[0014] The CPU determines whether the intensity change value of the optical signal received by the receiving tube is greater than a preset threshold value within a preset time interval;

[0015] If yes, an alarm is triggered.

[0016] The beneficial effects of the present invention are: simple structure, low cost, and low false alarm rate. The specific use process is that when the pressing cover is pushed, the pressing cover will move from the first position to the second position. In the process of approaching the transmitting tube, the size of the optical signal received by the receiving tube will change. The CPU determines whether it is caused by the movement of the reflection position based on the difference between the front and back values ​​of the received photoelectric signal. If the difference between the front and back values ​​is greater than the preset threshold, it is determined that it is caused by the movement of the reflection position and an alarm is triggered. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work:

[0018] Figure 1 is an exploded view of a manual fire alarm button provided in Embodiment 1 of the present invention;

[0019] Figure 2 is a cross-sectional view of a manual fire alarm button provided in Embodiment 1 of the present invention;

[0020] Figure 3 is another cross-sectional view of a manual fire alarm button provided in the first embodiment of the present invention;

[0021] Figure 4 is another cross-sectional view of a manual fire alarm button provided in the first embodiment of the present invention;

[0022] Figure 5 is a cross-sectional view of a manual fire alarm button provided in Embodiment 2 of the present invention;

[0023] Figure 6 is a cross-sectional view of a manual fire alarm button provided in Embodiment 3 of the present invention;

[0024] Figure 7 is another cross-sectional view of a manual fire alarm button provided in Embodiment 3 of the present invention;

[0025] Figure 8 It is a structural schematic diagram of a press cover in a manual fire alarm button provided in Embodiment 3 of the present invention. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be described clearly and completely in combination with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are partial embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0027] Embodiment 1

[0028] The embodiment of the present invention provides a manual fire alarm button, such as Figures 1 to 4As shown, it includes an installation box 10, a pressing cover 11 movably connected to the installation box 10, and a PCBA board 12 located inside the installation box 10; the installation box 10 is provided with a pressing groove 180 corresponding to the pressing cover 11; the PCBA board 12 includes a CPU (not shown in the figure), a pair of transmitting tubes 13 and receiving tubes 14, and a bare board 15 fixed to the installation box 10; the CPU (not shown in the figure), the transmitting tube 13 and the receiving tube 14 are all fixed to the bare board 15; the transmitting tube 13 and the receiving tube 14 are both electrically connected to the CPU (not shown in the figure); the transmitting tube 13 and the receiving tube 14 are both facing the pressing cover 11; the position when the pressing cover 11 is closest to the pressing groove 180 is the first position, and the position when the pressing cover 11 is farthest from the pressing groove 180 is the second position; the pressing cover 11 is provided with a reflection position 181 that reflects the light emitted by the transmitting tube 13 to the receiving tube 14 when in the first position and / or the second position. The improved manual fire alarm button has a simple structure, low cost and low false alarm rate. The specific usage process is: when the pressing cover 11 is pushed, the pressing cover 11 will move from the first position to the second position. In the process of approaching the transmitting tube 13, the size of the optical signal received by the receiving tube 14 will change. The CPU (not shown in the figure) determines whether it is caused by the movement of the reflection position 181 based on the front and back difference of the received photoelectric signal. If the front and back difference is greater than the preset threshold, it is determined that it is caused by the movement of the reflection position 181 and an alarm is triggered.

[0029] like Figure 1 , Figure 3 and Figure 4 As shown, the reflection position 181 is a plane; the transmitting tube 13 and the receiving tube 14 are symmetrically distributed; the central axis of the transmitting tube 13 and the central axis of the receiving tube 14 are not parallel, so the installation is convenient.

[0030] like Figure 1-Figure 2 As shown, the pressing cover 11 is rotatably connected to the installation box 10.

[0031] like Figure 1-Figure 2 As shown, the pressing cover 11 includes a pressing plate 16 rotatably connected to the installation box 10, and a tongue 17 fixed to the free end of the pressing plate 16; a pressing groove 180 corresponds to the pressing plate 16; a reflection position 181 is provided on the tongue 17; the installation box 10 is provided with an anti-swing component 18 for preventing the tongue 17 from swinging back when the tongue 17 reaches the second position. After the on-site personnel press the pressing cover 11, the anti-swing component 18 clamps the tongue 17, and the reflection position 181, the transmitting tube 13 and the receiving tube 14 remain stationary. When the alarm is sounded, the light signal strength remains stable, and the alarm state can be maintained continuously.

[0032] like Figure 1-Figure 2As shown, the anti-return swing assembly 18 includes an elastic clamp arm 19 whose tail end is fixed to the installation box 10, and a reset member 110 corresponding to the elastic clamp arm 19; the elastic clamp arm 19 corresponds to the latch tongue 17; one end of the reset member 110 is fixed to the movable end of the elastic clamp arm 19, and the other end is fixed to the installation box 10. The structure is simple and the limiting effect is good.

[0033] like Figure 1-Figure 2 As shown, the reset member 110 is a spring, which has low cost and is easy to install.

[0034] Embodiment 2

[0035] The embodiment of the present invention provides a manual fire alarm button, which is the same as the first embodiment and is not described in detail. The difference is that: Figure 5 As shown, the pressing cover 11 is slidably connected to the installation box 10.

[0036] Embodiment 3

[0037] The embodiment of the present invention provides a manual fire alarm button, and the same points as those in the first embodiment are not repeated here, except that:

[0038] like Figure 6-Figure 8 As shown, the central axis of the transmitting tube 13 and the central axis of the receiving tube 14 are parallel; the reflection position 181 is concave; along the direction close to the transmitting tube 13, the reflection space formed by the reflection position 181 gradually becomes larger.

[0039] like Figure 6-Figure 8 As shown, the reflection position 181 includes a reflection plane 182 and two groups of reflection slopes 183 connected to both sides of the reflection plane 182; the transmitting tube 13 and the receiving tube 14 are symmetrically distributed about the reflection plane 182; the transmitting tube 13 and the receiving tube 14 are respectively facing the two groups of reflection slopes 183. When the reflection position 181 is far away from the transmitting tube 13 and the receiving tube 14, a large amount of light is scattered, and the optical signal received by the receiving tube 14 is weak; when the reflection position 181 is close to the transmitting tube 13 and the receiving tube 14, the light emitted by the transmitting tube 13 is concentrated at the reflection position 181, and the light that is scattered and lost is small, ensuring that the receiving tube 14 can receive a strong photoelectric signal.

[0040] Embodiment 4

[0041] An embodiment of the present invention provides a method for using a manual fire alarm button. Based on a manual fire alarm button provided in any of the above embodiments, the method comprises the following steps:

[0042] Step S1: The CPU continuously obtains the intensity value of the optical signal received by the receiving tube.

[0043] Step S2: The CPU determines whether the intensity change value of the optical signal received by the receiving tube is greater than a preset threshold value within a preset time interval.

[0044] Step S3: If yes, trigger an alarm.

[0045] 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 appended claims of the present invention.

Claims

1. A manual fire alarm button, comprising an installation box, a pressing cover movably connected to the installation box, and a PCBA board located inside the installation box; the installation box is provided with a pressing groove corresponding to the pressing cover; the PCBA board comprises a CPU, a pair of transmitting tubes and receiving tubes, A bare board fixed to the installation box; the CPU, the transmitting tube and the receiving tube are all fixed to the bare board; the transmitting tube and the receiving tube are both electrically connected to the CPU; characterized in that: The transmitting tube and the receiving tube are both facing the pressing cover; the position when the pressing cover is closest to the pressing groove is the first position, and the position when the pressing cover is farthest from the pressing groove is the second position; the pressing cover is provided with a reflection position for reflecting the light emitted by the transmitting tube toward the receiving tube in the first position and / or the second position; the reflection position is a plane; the transmitting tube and the receiving tube are symmetrically distributed; the central axis of the transmitting tube and the central axis of the receiving tube are not parallel; the pressing cover is rotatably connected to the installation box; the pressing cover includes a pressing plate rotatably connected to the installation box and a tongue fixed to the free end of the pressing plate; the pressing groove corresponds to the pressing plate; the reflection position is provided at the tongue; the installation box is provided with an anti-swing component for preventing the tongue from swinging back when the tongue reaches the second position.

2. A manual fire alarm button according to claim 1, characterized in that: The anti-swing back assembly includes an elastic clamping arm whose tail end is fixed to the installation box, and a reset piece corresponding to the elastic clamping arm; the elastic clamping arm corresponds to the latch tongue; one end of the reset piece is fixed to the movable end of the elastic clamping arm, and the other end is fixed to the installation box.

3. A manual fire alarm button according to claim 2, characterized in that: The reset element is a spring.

4. A method for using a manual fire alarm button, based on a manual fire alarm button according to any one of claims 1 to 3, characterized in that: The steps include: The CPU continuously obtains the intensity value of the optical signal received by the receiving tube; The CPU determines whether the intensity change value of the optical signal received by the receiving tube is greater than a preset threshold value within a preset time interval; If yes, an alarm is triggered.

Images