A liquid identification device equipped with a capacitive touch sensor

Abstract

This utility model provides a liquid identification device with a capacitive touch sensor, relating to the field of security inspection technology. It includes a body with four mounting slots inside, each with a sliding groove on its side wall. A detection head is located at the center of the bottom of the body for liquid detection. A protection mechanism is located at the bottom of the body and includes a detection guide structure and a protective structure. A telescopic protective film (made of PET) unfolds to cover the detection head when the device is idle, forming a physical barrier to isolate dust and particulate matter in the air. The PET film surface is hydrophobic, forming beads that roll off when liquid splashes, preventing residual corrosion of the detection head electrodes. When the body is inserted into the liquid, the bottom plate is pressured, causing the connecting plate to slide down along the sliding groove, simultaneously stretching the telescopic protective film and rewinding it between the first and second connecting slots. The detection head passes through the bottom plate groove and is exposed to contact the liquid.

Description

Technical Field

[0001] This utility model relates to the field of security inspection technology, and in particular to a liquid identification device carrying a capacitive touch sensor. Background Technology

[0002] The hazardous liquid identification device is a security inspection instrument used to detect flammable and explosive liquids. It uses quasi-static computed tomography technology to determine the flammability and explosiveness of the liquid by measuring its dielectric constant and conductivity.

[0003] Existing technology (CN212723399U) discloses a method for protecting a detection head through a mechanical buffer structure, comprising a body, a capacitive touch screen, a detection head, and a handle. The capacitive touch screen is embedded in the upper surface of the body. The detection head is mounted at one end of the body, and the handle is fixedly connected to the other end. Sleeves are symmetrically mounted on both sides of the detection head. A support rod is movably connected to one end of each sleeve, and a rigid spring is installed inside the sleeve. A limit plate is fixedly connected to one end of the support rod, and a rubber post is circumferentially arranged on one side of the rigid spring. A connecting plate is welded to the other end of the support rod, and a rubber pad is adhered to the surface of the connecting plate. The rubber pad has a cavity inside. This invention, by installing a protective component at the detection head, provides excellent protection for the detection head and prevents it from falling.

[0004] However, the above solution still has the following shortcomings when implemented: Existing technologies employ a passive buffer design that is "drop-triggered," which can only cope with physical impacts and cannot address environmental threats such as dust accumulation and liquid splashes that the detection head faces when it is idle.

[0005] Therefore, we propose a liquid identification device with a capacitive touch sensor. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies. Existing technologies employ a passive buffer design based on "drop triggering," which can only cope with physical impacts and cannot address environmental threats such as dust accumulation and liquid splashing faced by the detection head when it is idle.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A liquid identification device incorporating a capacitive touch sensor, comprising: The body has four mounting slots inside, and each of the four mounting slots has a sliding groove on its two side walls. The detection head, located at the center of the bottom of the machine body, is used for detecting liquids; A protective mechanism is located at the bottom of the machine body, which includes a detection guide structure and a protective structure. The detection guide structure is used to allow the machine body to be inserted into the liquid vertically through the extension and retraction movement of the detection guide structure when the machine body is performing detection. The protective structure is used to protect the detection head by stretching synchronously when the detection guide structure is extending and retracting.

[0008] As a preferred embodiment of this utility model, the detection guiding structure includes: The base plate has a through groove at its bottom, the diameter of which is larger than that of the detection head; Four connecting rods are fixedly installed at the four corners of the top of the base plate; Four connecting plates are fixedly installed on the top of the connecting rod, and sliders are fixedly provided on both sides of each connecting plate; Four telescopic springs are fixedly installed on the top of the four connecting plates, and their other ends are connected to the top of the mounting groove.

[0009] As a preferred embodiment of this utility model, the protective structure includes: The first connecting groove is formed on the top of the base plate; A threaded connection groove is formed on the bottom of the base plate; The second connecting groove is formed at the bottom of the machine body and located on the outside of the detection head. The diameter of the second connecting groove is the same as the diameter of the first connecting groove. The diameters of both the threaded connection groove and the first connection groove are larger than the through groove opened at the bottom plate.

[0010] As a preferred embodiment of this utility model, the protective structure further includes: A threaded sealing cap is screwed into the threaded connection groove to form a threaded connection, thereby protecting the bottom of the detection head when not in use. A telescopic protective film is installed between the first connecting groove and the second connecting groove. When not in use, it is unfolded to cover the detection head and form a physical barrier to isolate dust and particulate matter in the air. The telescopic protective film is made of PET. Both ends of the telescopic protective film are fixed to the first connecting groove and the second connecting groove by heat fusion bonding.

[0011] As a preferred embodiment of this utility model, when the body is used downwards, the base plate is subjected to pressure and slides in the sliding groove through the protection mechanism, connecting plate and slider, thereby allowing the detection head to pass through the through groove at the bottom of the base plate to detect the liquid; When the connecting plate slides, it simultaneously compresses the telescopic spring. After use, the telescopic spring will reset the connecting plate.

[0012] As a preferred embodiment of this utility model, the front of the body is provided with a display screen, and the top is provided with a handheld part; Rubber cushioning strips are provided on all four walls of the machine body, especially near the top and bottom.

[0013] Compared with the prior art, the beneficial effects of this utility model are: In this invention, the telescopic protective film (made of PET) unfolds to cover the detection head when the equipment is idle, forming a physical barrier to isolate dust and particulate matter in the air. The surface of the PET film is hydrophobically treated, so when liquid splashes, it forms beads that roll off, preventing residual corrosion of the detection head electrodes. When the machine body is inserted into the liquid, the base plate is pressured, causing the connecting plate to slide down along the sliding groove, simultaneously stretching the telescopic protective film and rolling it between the first and second connecting grooves. The detection head passes through the through groove of the base plate, is exposed, and comes into contact with the liquid. After the detection is completed, the telescopic spring resets, causing the protective film to unfold automatically, realizing an automated closed loop of "detection-protection" and avoiding protective omissions caused by manual operation. The threaded sealing cap is screwed into the threaded connecting groove at the bottom of the base plate to form a mechanical seal, providing additional protection for the bottom of the detection head when the equipment is idle for a long time or during transportation, preventing foreign objects from entering or liquid from penetrating. The detection guide structure, through the combination of the base plate, connecting rod, connecting plate, and slider, enables the machine body to move accurately in the vertical direction when inserted into the liquid, avoiding collisions of the detection head caused by tilting. The telescopic spring provides cushioning during the downward pressing process, absorbing the impact force during insertion and protecting the detection head from mechanical damage. After the detection is completed, the telescopic spring drives the connecting plate to reset, causing the base plate and protective film to return to their initial state, ensuring the stability of the protective structure for long-term use. Attached Figure Description

[0014] Figure 1 A schematic diagram of the main structure of a liquid identification device carrying a capacitive touch sensor provided by this utility model; Figure 2 A first-view diagram showing the unfolded liquid identification device carrying a capacitive touch sensor provided by this utility model; Figure 3 A second-view diagram illustrating the unfolded liquid identification device carrying a capacitive touch sensor provided by this utility model; Figure 4 This is a cross-sectional schematic diagram of a liquid identification device carrying a capacitive touch sensor provided by this utility model.

[0015] Legend: 10. Body; 20. Protective mechanism; 201. Base plate; 202. Connecting rod; 203. Connecting plate; 204. Slider; 205. Telescopic spring; 206. First connecting groove; 207. Threaded connecting groove; 208. Threaded sealing cap; 209. Telescopic protective film; 30. Mounting groove; 40. Sliding groove; 50. Second connecting groove; 60. Detection head; 70. Display screen; 80. Handheld part; 90. Rubber buffer protective strip. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0017] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0018] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. Example

[0020] like Figure 1-4 As shown, this utility model provides a technical solution: a liquid identification device carrying a capacitive touch sensor, including a body 10, with four mounting slots 30 inside the body 10, and sliding slots 40 on both sides of the four mounting slots 30. The detection head 60 is located at the center of the bottom of the body 10 and is used to detect liquids; The protective mechanism 20 is located at the bottom of the body 10. It includes a detection guide structure and a protective structure. The detection guide structure is used to allow the body 10 to be inserted into the liquid vertically through the telescopic movement of the detection guide structure when the body 10 is performing detection. The protective structure is used to protect the detection head 60 by stretching synchronously when the detection guide structure is telescopically guiding.

[0021] When the operator holds the device to perform liquid detection, the dual functions of the protection mechanism 20 are realized through mechanical linkage. The detection guide structure, through the cooperation of the slider 204 and the sliding groove 40, constrains the downward action in the vertical direction, ensuring that the detection head 60 is inserted vertically into the liquid, avoiding detection errors or physical collisions caused by tilting. The protection structure is activated simultaneously during the guidance process, and the detection head 60 is dynamically protected by the expansion and contraction of the protective film 209. Specifically, the symmetrical distribution of the mounting groove 30 and the sliding groove 40 forms a stable four-bar guide mechanism, the geometric center of which coincides with the axis of the detection head 60, ensuring guidance accuracy.

[0022] The detection guide structure includes a base plate 201, and a through groove is provided at the bottom of the base plate 201. The diameter of the through groove is larger than that of the detection head 60. Four connecting rods 202 are fixedly installed at the four corners of the top of the base plate 201; Four connecting plates 203 are fixedly installed on the top of the connecting rod 202, and sliders 204 are fixedly installed on both sides of each connecting plate 203. Four telescopic springs 205 are fixedly installed on the top of the four connecting plates 203, and their other ends are connected to the top of the mounting groove 30.

[0023] When the base plate 201 is subjected to downward pressure, the four connecting rods 202 simultaneously transmit the force to the connecting plate 203. The connecting plate 203 moves linearly in the sliding groove 40 through the slider 204. The slider 204 reduces the motion resistance of the guide mechanism, ensuring easy operation. The telescopic spring 205 stores elastic potential energy when compressed. When the external force is released, the spring releases energy to push the connecting plate 203 to reset. The reset accuracy is ensured by the preload of the spring and the limiting structure of the sliding groove 40. The diameter of the through groove of the base plate 201 is 2mm larger than that of the detection head 60, which ensures that the detection head passes smoothly and prevents foreign objects from entering from the side.

[0024] The protective structure includes a first connecting groove 206, which is formed on the top of the base plate 201; Threaded connection groove 207 is formed at the bottom of base plate 201; The second connecting groove 50 is opened at the bottom of the body 10 and is located on the outside of the detection head 60. The diameter of the second connecting groove 50 is the same as the diameter of the first connecting groove 206. The diameters of both the threaded connection groove 207 and the first connection groove 206 are larger than the through groove opened at the base plate 201.

[0025] The first connecting groove 206 and the second connecting groove 50 form the unfolding track of the protective film 209. The diameter consistency tolerance of ±0.05mm ensures that the protective film is subjected to uniform force during movement. The internal thread of the threaded connecting groove 207 cooperates with the threaded sealing cap 208 to form a seal. When the base plate 201 rises, the first connecting groove 206 approaches the second connecting groove 50, and the protective film 209 gradually unfolds. Conversely, when the base plate descends, the protective film is rolled into the first connecting groove 206. The whole process is precisely controlled by the mechanical structure to avoid wrinkles or jamming of the protective film.

[0026] The protective structure also includes a threaded sealing cap 208, which is rotated and screwed into the threaded connection groove 207 to form a threaded connection, thereby protecting the bottom of the detection head 60 when not in use. The telescopic protective film 209 is installed between the first connecting groove 206 and the second connecting groove 50. It is used to unfold and cover the detection head 60 when not in use, forming a physical barrier to isolate dust and particulate matter in the air. The telescopic protective film 209 is made of PET. Both ends of the telescopic protective film 209 are fixed to the first connecting groove 206 and the second connecting groove 50 by heat fusion bonding.

[0027] The threaded sealing cap 208 generates axial displacement through rotation, forming the first line of sealing between its end face and the base plate 201. The PET stretchable protective film 209 has a breaking elongation of 150%, which can withstand repeated expansion and contraction without breaking. The hot melt bonding process fuses the PET film with the connecting groove material at 150℃ to form a continuous sealing strip with a width of 5mm and a peel strength of ≥5N / cm, effectively preventing dust from seeping in from the edges. The hydrophobic treatment on the surface of the protective film has a contact angle of ≥110°, which prevents liquid from staying on the surface and further enhances the protective effect.

[0028] When the body 10 is used downwards, the base plate 201 is subjected to pressure and slides in the sliding groove 40 through the protection mechanism 20, the connecting plate 203 and the slider 204, so that the detection head 60 can pass through the through groove at the bottom of the base plate 201 to detect the liquid. When the connecting plate 203 slides, it will simultaneously compress the telescopic spring 205. After use, the telescopic spring 205 will reset the connecting plate 203.

[0029] When the operator presses down on the device, the base plate 201 first contacts the liquid surface, and the pressure is transmitted to the connecting plate 203 through the connecting rod 202. While the slider 204 slides in the sliding groove 40, the protective film 209 is gradually rolled up, exposing the detection head 60.

[0030] The front of the body 10 is provided with a display screen 70, and the top is provided with a handheld part 80; Rubber buffer strips 90 are provided on all four sides of the body 10, and near the top and bottom.

[0031] The radius of curvature R30mm of the handheld part 80 conforms to ergonomic standards, and the friction coefficient of the anti-slip rubber layer is ≥0.8, ensuring grip safety in humid environments. The display screen 70 is connected to the detection head 60 through an internal circuit to display detection data in real time. The rubber buffer protection strip 90 adopts a closed-cell foam structure with a density of 0.8g / cm³. When the device is dropped, the compression deformation of the material absorbs energy and effectively protects the internal circuit.

[0032] The liquid identification device with a capacitive touch sensor provided by this utility model works on the principle of achieving dynamic protection and accurate detection of the detection head through the mechanical linkage between the detection guide structure of the protection mechanism and the protective structure. Specifically, the following applies: I. The linkage mechanism between detection guidance and protection Detection status trigger When the body 10 is pressed down, the base plate 201 is driven by the pressure to slide the connecting rod 202 and the connecting plate 203 down the sliding groove 40. The slider 204 is precisely guided in the sliding groove 40, so that the through groove of the base plate 201 is aligned with the detection head 60. The detection head passes through the through groove and is exposed to contact the liquid. At the same time, the telescopic protective film 209 is pulled by the base plate 201 and rolled up from the second connecting groove 50 to the first connecting groove 206, completely exposing the detection head 60.

[0033] Reset protection after testing After the machine body 10 is released, the telescopic spring 205 returns to its original position, pushing the connecting plate 203 to move upward. The base plate 201 rises synchronously, causing the telescopic protective film 209 to unfold from the first connecting groove 206 to the second connecting groove 50, and re-cover the detection head 60.

[0034] II. Dual Protection Design of the Protective Structure Dynamic dust and dirt prevention When not in use, the PET stretchable protective film 209 unfolds to cover the detection head 60, forming a physical barrier to isolate dust. The surface hydrophobic treatment and contact angle ≥110° allow liquid to form beads and roll off when splashed, preventing residual corrosion of the electrode.

[0035] Long-term idle enhanced protection Before the equipment is idle for a long time or before it is transported, screw the threaded sealing cap 208 into the threaded connection groove 207 at the bottom of the base plate 201 to form a mechanical seal that works in conjunction with the telescopic protective membrane 209 to achieve full-enclosed protection of the detection head 60.

[0036] Shock protection The rubber buffer strips 90 around the body 10 adopt a closed-cell foam structure to protect the internal circuit.

[0037] IV. Collaborative Operation of Core Components The detection guide structure: The four-bar linkage of the base plate 201, connecting rod 202, connecting plate 203 and slider 204 ensures that the machine body is inserted vertically into the liquid, and the telescopic spring 205 provides buffering to absorb the insertion impact force.

[0038] Protective structure: The PET protective film 209, which is precisely fitted and heat-melted with the first connecting groove 206 and the second connecting groove 50, expands and contracts synchronously with the movement of the base plate, and the threaded sealing cap 208 achieves sealing through threads.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A liquid discriminating device carrying a capacitive touch sensor, characterized in that, include: The body (10) has four mounting slots (30) inside, and sliding slots (40) are provided on both sides of the four mounting slots (30). The detection head (60) is located at the center of the bottom of the body (10) and is used to detect liquids; The protective mechanism (20) is located at the bottom of the body (10) and includes a detection guide structure and a protective structure. The detection guide structure is used to allow the body (10) to be inserted into the liquid in a vertical direction through the telescopic movement of the detection guide structure when the body (10) is performing detection. The protective structure is used to protect the detection head (60) by stretching synchronously when the detection guide structure is telescopically guided.

2. The liquid discriminating device according to claim 1, wherein The detection guidance structure includes: The bottom of the base plate (201) has a through groove, the diameter of which is larger than that of the detection head (60). Four connecting rods (202) are fixedly installed at the four corners of the top of the base plate (201); Four connecting plates (203) are fixedly installed on the top of the connecting rod (202), and sliders (204) are fixedly provided on both sides of each connecting plate (203). Four telescopic springs (205) are fixedly installed on the top of the four connecting plates (203), and their other ends are connected to the top of the mounting groove (30).

3. The liquid discriminating device according to claim 2, wherein The protective structure includes: The first connecting groove (206) is formed on the top of the base plate (201); A threaded connection groove (207) is formed at the bottom of the base plate (201); The second connecting groove (50) is opened at the bottom of the body (10) and located on the outside of the detection head (60). The diameter of the second connecting groove (50) is the same as the diameter of the first connecting groove (206). The diameters of the threaded connection groove (207) and the first connection groove (206) are both larger than the through groove opened at the base plate (201).

4. The liquid discriminating device of claim 3, wherein: The protective structure also includes: A threaded sealing cap (208) is screwed into the threaded connection groove (207) to form a threaded connection, thereby protecting the bottom of the detection head (60) when not in use; A telescopic protective film (209) is installed between the first connecting groove (206) and the second connecting groove (50) for unfolding to cover the detection head (60) when idle, forming a physical barrier to isolate dust and particulate matter in the air. The telescopic protective film (209) is made of PET. Both ends of the telescopic protective film (209) are fixed to the first connecting groove (206) and the second connecting groove (50) by heat fusion bonding.

5. The liquid discriminating device according to claim 4, wherein When the body (10) is used downwards, the base plate (201) is subjected to pressure and slides in the sliding groove (40) through the protection mechanism (20), the connecting plate (203) and the slider (204), thereby allowing the detection head (60) to pass through the through groove at the bottom of the base plate (201) to detect the liquid; When the connecting plate (203) slides, it will simultaneously compress the telescopic spring (205). After use, the telescopic spring (205) will reset the connecting plate (203).

6. The liquid discriminating device according to claim 5, wherein The front of the body (10) is provided with a display screen (70) and the top is provided with a hand-held part (80). Rubber buffer strips (90) are provided on the four walls of the body (10) and near the top and bottom.

Images