Formaldehyde concentration detection device

Abstract

The utility model relates to the technical field of formaldehyde detection, in particular to a formaldehyde concentration detection device which comprises a shell, a detection assembly is arranged in the shell, a spring box is fixedly installed on the outer side of the shell, the output end of the spring box rotationally penetrates through the shell and is fixedly provided with a rotating shaft, a fixing belt is wound on the outer side of the rotating shaft, and the fixing belt is fixedly connected with the shell. And one end of the fixing belt penetrates through the shell and is fixedly connected with the outer side of the shell. By arranging the fixing band, when the detector needs to be held by hand for use, the driving rod is rotated anticlockwise firstly, so that the pawl is not meshed with the ratchet wheel any more, the fixing band can be pulled outwards and sleeved on the hand of a user, and meanwhile, the spring box is used for driving the rotating shaft to reset and rotate, so that the fixing band can be ensured to be completely attached to the hand; and then the driving rod is loosened, and the pawl is pushed to be meshed with the ratchet wheel again by utilizing resilience force of the spring, so that the rotating shaft can be prevented from rotating anticlockwise, and the detector is prevented from easily sliding off from the hand.

Description

Technical Field

[0001] The utility model relates to the technical field of formaldehyde detection, in particular to a formaldehyde concentration detection device. Background Art

[0002] During the process of house decoration, most of the decoration materials used contain formaldehyde, and this formaldehyde will volatilize into the indoor air, affecting people's physical health. Therefore, after decoration, it is necessary to ventilate to reduce the indoor formaldehyde concentration, and at the same time use a formaldehyde detector to detect the formaldehyde concentration in the room.

[0003] Existing detectors usually do not have an anti-dropping device. When the detector needs to be held by hand, if the user's hand sweats or becomes slippery due to contact with water or other reasons, the friction between the hand and the detector will be reduced, and it is easy to cause the detector to drop. Summary of the Utility Model

[0004] Aiming at the above-mentioned shortcomings of the existing technology, the utility model provides a formaldehyde concentration detection device, which can effectively solve the problem of the lack of an anti-dropping device in the existing technology.

[0005] To achieve the above purposes, the utility model is realized through the following technical solutions:

[0006] The utility model provides a formaldehyde concentration detection device, including a housing. A detection component is arranged inside the housing. A spring box is fixedly installed on the outside of the housing. The output end of the spring box rotates through the housing and is fixedly installed with a rotating shaft. A fixing belt is wound around the outside of the rotating shaft, and one end of the fixing belt passes through the housing and is fixedly connected to the outside thereof;

[0007] It also includes a hollow box fixedly installed on the outside of the housing. A driving rod is rotatably connected inside the hollow box. A ratchet pawl is fixedly installed on the outside of the driving rod. One end of the rotating shaft rotates through the housing and is fixedly installed with a ratchet wheel meshing with the ratchet pawl at the corresponding position. A spring is fixedly installed on the opposite side of the ratchet pawl and the hollow box.

[0008] According to the above-mentioned formaldehyde concentration detection device, the detection component includes a storage battery, a controller and a sensor fixedly installed inside the housing. The storage battery, the controller and the sensor are electrically connected to form a working circuit. The detection end of the sensor is communicated with an air inlet pipe, and the top end of the air inlet pipe passes through the housing.

[0009] According to the above-mentioned formaldehyde concentration detection device, a display screen and control buttons are embedded and installed on the front side of the housing. The display screen and the control buttons are electrically connected to the controller to form a control circuit.

[0010] According to the above-mentioned formaldehyde concentration detection device, a limit ring is rotatably sleeved outside the air inlet pipe. An elastic band is fixedly installed outside the limit ring, and the other end of the elastic band is fixedly installed with a plug block, and the plug block is clamped with the top end of the air inlet pipe.

[0011] According to the above-mentioned formaldehyde concentration detection device, a plurality of heat dissipation holes are symmetrically formed on both sides of the housing.

[0012] According to the above-mentioned formaldehyde concentration detection device, a plurality of buffer pads are symmetrically and fixedly installed outside the housing, and the buffer pads are made of rubber material.

[0013] The technical solution provided by the present utility model has the following beneficial effects compared with the known prior art:

[0014] By setting the fixing belt in the present utility model, when the detector needs to be used by hand, first rotate the driving rod counterclockwise so that the ratchet pawl on its outer side no longer meshes with the ratchet wheel, so that the fixing belt can be pulled outwards and put on the user's hand. At the same time, the spring box drives the rotating shaft to rotate back to its original position, so as to ensure that the fixing belt can completely fit on the hand. Then release the driving rod, and use the resilience of the spring to push the ratchet pawl back to its original position and mesh with the ratchet wheel again, so as to prevent the rotating shaft from rotating counterclockwise and avoid the detector slipping easily from the hand, providing a certain protection for the detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 is a structural schematic diagram of the present utility model;

[0017] Figure 2 is a cross-sectional view of the housing of the present utility model;

[0018] Figure 3 is a side view of the present utility model.

[0019] Reference numerals: 1, housing; 2, spring box; 21, rotating shaft; 22, fixing belt; 3, hollow box; 31, driving rod; 32, ratchet pawl; 33, ratchet wheel; 34, spring; 4, storage battery; 41, controller; 42, inductor; 43, air inlet pipe; 5, display screen; 51, control button; 6, limit ring; 61, elastic band; 62, plug block; 7, heat dissipation hole; 8, buffer pad. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] The present utility model will be further described below in conjunction with embodiments.

[0022] Embodiment: Refer to Figures 1 to 3 , a formaldehyde concentration detection device, including a housing 1. A detection component is arranged inside the housing 1. A spring box 2 is fixedly installed on the outside of the housing 1. The output end of the spring box 2 rotates through the housing 1 and fixedly installs a rotating shaft 21. A fixing belt 22 is wound around the outside of the rotating shaft 21, and one end of the fixing belt 22 passes through the housing 1 and is fixedly connected to the outside thereof;

[0023] It further includes a hollow box 3 fixedly installed on the outside of the housing 1. A driving rod 31 is rotatably connected inside the hollow box 3. A ratchet pawl 32 is fixedly installed on the outside of the driving rod 31. One end of the rotating shaft 21 rotates through the housing 1 and fixedly installs a ratchet wheel 33 meshing with the ratchet pawl 32 at the corresponding position. A spring 34 is fixedly installed on the opposite side of the ratchet pawl 32 and the hollow box 3. When it is necessary to hold the detector by hand, first rotate the driving rod 31 counterclockwise so that the ratchet pawl 32 on its outside no longer meshes with the ratchet wheel 33, so that the fixing belt 22 can be pulled outwards. Then put the fixing belt 22 on the user's hand. At the same time, use the spring box 2 to drive the rotating shaft 21 to rotate clockwise, so that the fixing belt 22 is wound around the rotating shaft 21 again, so as to ensure that the fixing belt 22 can be completely attached to the hand. Then release the driving rod 31, and use the resilience of the spring 34 to push the ratchet pawl 32 to reset, so that the ratchet pawl 32 meshes with the ratchet wheel 33 again, thereby preventing the rotating shaft 21 from rotating counterclockwise and avoiding the detector from slipping off the hand easily, providing a certain protection for the detector.

[0024] The detection component includes a storage battery 4, a controller 41, and a sensor 42 fixedly installed inside the housing 1. The storage battery 4, the controller 41, and the sensor 42 are electrically connected to form a working circuit. The detection end of the sensor 42 is communicated with an air inlet pipe 43, and the top end of the air inlet pipe 43 passes through the housing 1. The storage battery 4 provides power for the entire device, enabling it to work normally without an external power source, ensuring the portability and flexibility of the device, and allowing detection in different places. During detection, the outside air is directly transmitted to the sensor 42 through the air inlet pipe 43, enabling it to sense formaldehyde molecules in the air and transmit signals to the controller 41.

[0025] On the front side of the housing 1, a display screen 5 and control buttons 51 are embedded and installed. The display screen 5 and the control buttons 51 are electrically connected to the controller 41 to form a control loop. When the user presses the control buttons 51, the electrical signals generated by the control buttons 51 are transmitted to the controller 41. The controller 41 executes corresponding operation instructions according to the signals and then feeds back the operation results to the display screen 5.

[0026] A limiting ring 6 is rotatably sleeved outside the air inlet pipe 43. A elastic band 61 is fixedly installed outside the limiting ring 6. The other end of the elastic band 61 is fixedly installed with a blocking block 62. And the blocking block 62 is clamped with the top end of the air inlet pipe 43. When not in use, the blocking block 62 blocks the top end of the air inlet pipe 43 to prevent foreign impurities from entering the air inlet pipe 43 and avoid damage to the sensor 42. At the same time, the limiting ring 6 and the elastic band 61 can prevent the blocking block 62 from being lost and improve the use effect of the device.

[0027] On both sides of the housing 1, a plurality of heat dissipation holes 7 are symmetrically opened to promote the air circulation inside the housing 1 and ventilate and dissipate heat from the internal devices.

[0028] On the outside of the housing 1, a plurality of buffer pads 8 are symmetrically and fixedly installed. And the buffer pads 8 are made of rubber material to play a buffering role and protect the device when it accidentally falls.

[0029] The working principle of the present utility model is as follows: When detecting the formaldehyde concentration, the battery 4 continuously provides power for the entire detector. The user removes the blocking block 62 at the top of the air inlet pipe 43, so that the outside air is directly transmitted to the sensor 42 through the air inlet pipe 43. The sensor 42 continuously senses the formaldehyde in the air and transmits the signal to the controller 41. The controller 41 processes the signal and outputs the result. The controller 41 transmits the processed formaldehyde concentration data to the display screen 5 in a specific signal format. The display screen 5 decodes and displays after receiving these signals, enabling the user to intuitively see the current detection result;

[0030] When the detector needs to be held for operation, first rotate the driving rod 31 counterclockwise so that the ratchet pawl 32 on its outside no longer meshes with the ratchet wheel 33, so that the fixing belt 22 can be pulled outwards. Then the fixing belt 22 is put on the user's hand. At the same time, the spring box 2 is used to drive the rotating shaft 21 to rotate clockwise, so that the fixing belt 22 is wound around the rotating shaft 21 again to ensure that the fixing belt 22 can fully fit on the hand. Then release the driving rod 31, and use the resilience of the spring 34 to push the ratchet pawl 32 back to its original position, so that the ratchet pawl 32 meshes with the ratchet wheel 33 again, thereby preventing the rotating shaft 21 from rotating counterclockwise during use and avoiding the detector from slipping easily from the hand, providing a certain protection for the detector.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A formaldehyde concentration detection device, characterized in that, It includes a housing (1), a detection component is arranged inside the housing (1), a spring box (2) is fixedly installed on the outside of the housing (1), the output end of the spring box (2) rotates through the housing (1) and is fixedly installed with a rotating shaft (21), a fixing belt (22) is wound around the outside of the rotating shaft (21), and one end of the fixing belt (22) passes through the housing (1) and is fixedly connected to the outside thereof; It also includes a hollow box (3) fixedly installed on the outside of the housing (1), a driving rod (31) is rotatably connected inside the hollow box (3), a pawl (32) is fixedly installed on the outside of the driving rod (31), one end of the rotating shaft (21) rotates through the housing (1) and a ratchet wheel (33) meshing with it is fixedly installed at the corresponding position of the pawl (32), and a spring (34) is fixedly installed on the opposite side of the pawl (32) and the hollow box (3).

2. The formaldehyde concentration detection device according to claim 1, characterized in that, The detection component includes a storage battery (4), a controller (41) and a sensor (42) fixedly installed inside the housing (1), the storage battery (4), the controller (41) and the sensor (42) are electrically connected to form a working circuit, an air inlet pipe (43) is communicated with the detection end of the sensor (42), and the top end of the air inlet pipe (43) passes through the housing (1).

3. The formaldehyde concentration detection device according to claim 2, characterized in that, A display screen (5) and control buttons (51) are embedded and installed on the front side of the housing (1), and the display screen (5) and the control buttons (51) are electrically connected to the controller (41) to form a control circuit.

4. A formaldehyde concentration detection device according to claim 2, characterized in that, A limiting ring (6) is rotatably sleeved on the outside of the air inlet pipe (43), an elastic belt (61) is fixedly installed on the outside of the limiting ring (6), the other end of the elastic belt (61) is fixedly installed with a plug block (62), and the plug block (62) is clamped with the top end of the air inlet pipe (43).

5. The formaldehyde concentration detection device according to claim 1, characterized in that, A plurality of heat dissipation holes (7) are symmetrically opened on both sides of the housing (1).

6. The formaldehyde concentration detection device according to claim 1, characterized in that A plurality of buffer pads (8) are symmetrically fixedly installed on the outside of the housing (1), and the buffer pads (8) are made of rubber material.

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