A test meter facilitating sampling

Abstract

The utility model relates to test appearance technical field, concretely relates to a kind of test appearance convenient for sampling, including shell;Shell is equipped with placing cavity;Shell is equipped with blow mouth;Placing cavity is equipped with sampling seat;Sampling seat is equipped with sampling air bag and push seat;Push seat is slidably arranged in sampling seat;Sampling seat is equipped with sampling channel;Sampling channel is communicated with sampling air bag;Sampling channel is communicated with placing cavity;Placing cavity is fixedly equipped with baffle;Reset spring is equipped between push seat and baffle;The top of shell is equipped with push block;Push block is connected with push seat.The utility model realizes the expansion and contraction of sampling air bag by the mechanical cooperation of push block, push seat and reset spring, replaces the driving mode of relying on air pump, electromagnet and other electronic devices in prior art, greatly reduces the use of electronic components, not only simplifies the overall structure of test appearance, but also reduces the manufacturing cost and assembly difficulty of equipment, more convenient for mass production use.

Description

Technical Field

[0001] This utility model relates to the field of testing instrument technology, and specifically to a testing instrument that facilitates sampling. Background Technology

[0002] In fields closely related to public safety and health, such as traffic enforcement, industrial safety monitoring, and healthcare, air-blowing testing instruments have become indispensable core equipment due to their advantage of rapid on-site detection. The working principle of this type of air-blowing detection instrument is as follows: the gas to be tested is driven by the user's blowing action, entering the internal detection area through the instrument's preset blowing channel and making full contact with a dedicated gas sensor. The sensor generates a corresponding electrical signal based on the type and concentration of the target component in the gas. This electrical signal is then converted and analyzed by a subsequent signal processing module, and finally output as a direct detection result, completing the entire detection process. To further improve the accuracy of test results and avoid measurement errors caused by unstable airflow and uneven gas mixing, the industry currently widely adopts airbag sampling for gas pretreatment. The airbag temporarily stores and stabilizes the gas exhaled by the user before guiding it into the sensor's detection area, thereby optimizing the contact conditions between the gas and the sensor and improving the reliability of the test data. However, existing airbag sampling air-blowing testers rely on electronic devices such as air pumps and electromagnets for power during both the airbag's suction and exhaust processes. During the suction phase, electronic devices draw gas into the airbag, and during the exhaust phase, electronic devices expel the gas from the airbag or guide it into the detection area. This type of solution, which relies on electronic components to control the airway of the airbag, not only increases the overall structural complexity and manufacturing cost of the instrument, but may also cause the airway control to fail due to the aging or malfunction of the electronic components, affecting the long-term stable operation of the instrument. At the same time, the operation of the electronic components requires additional power consumption, which shortens the battery life of the portable testing instrument, limits its flexibility of use in scenarios without an external power supply, and makes it difficult to fully meet the diverse needs of practical applications. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by providing a testing instrument that facilitates sampling.

[0004] The objective of this utility model is achieved through the following technical solution: a testing instrument for easy sampling, comprising a housing; a placement cavity is provided inside the housing; an air inlet communicating with the placement cavity is provided inside the housing; a sampling seat is provided inside the placement cavity; the sampling seat is provided with a sampling airbag and a pushing seat; one end of the sampling airbag is fixedly connected to the sampling seat; the other end of the sampling airbag is fixedly connected to the pushing seat; the pushing seat is slidably disposed on the sampling seat; the sampling seat is provided with a sampling channel; one end of the sampling channel is connected to one end of the sampling airbag; the other end of the sampling channel is connected to the placement cavity; A baffle is fixedly installed inside the placement cavity; a return spring is provided between the push seat and the baffle; a push block is provided on the top of the housing; the push block is connected to the push seat.

[0005] The present invention is further configured such that the housing is provided with an exhaust port communicating with the placement cavity.

[0006] The present invention is further configured such that a circuit board is fixedly disposed inside the placement cavity; the baffle is fixedly connected to the circuit board; and the sampling seat is fixedly connected to the circuit board.

[0007] The present invention is further configured such that a push switch is provided on the top of the circuit board; a push member is provided on the top of the housing; and the push member abuts against the push switch.

[0008] The present invention is further configured such that the circuit board is provided with a limiting groove through it along the sliding direction of the push seat; the push seat is provided with a limiting rod; the limiting rod is slidably disposed in the limiting groove; and the push block is connected to the limiting rod.

[0009] The present invention is further configured such that the top of the housing is provided with a strip groove along the sliding direction of the push seat; the push block is slidably disposed in the strip groove.

[0010] The present invention is further configured such that a screw is provided at the end of the push seat away from the sampling airbag; and the reset spring is provided between the screw and the baffle.

[0011] The present invention is further configured such that the screw includes a rod portion, a threaded portion at one end of the rod portion, and a head portion at the other end of the rod portion; the end of the push seat away from the sampling airbag is threadedly connected to the threaded portion; the rod portion passes through the baffle; and the return spring is located between the head portion and the baffle.

[0012] The present invention is further configured such that the reset spring is sleeved outside the rod.

[0013] The beneficial effects of this utility model are as follows: This utility model achieves the expansion and contraction of the sampling airbag through the mechanical cooperation of the push block, the push seat, and the return spring, replacing the driving method of relying on electronic components such as air pumps and electromagnets in the prior art. This significantly reduces the use of electronic components, simplifies the overall structure of the tester, reduces the manufacturing cost and assembly difficulty of the equipment, and makes it easier for mass production. The failure rate of the mechanical transmission structure is much lower than that of electronic components, effectively avoiding the problem of air circuit control failure caused by the aging and failure of electronic components. This significantly improves the stability and reliability of the tester in long-term operation, extends the service life of the equipment, and reduces the later maintenance costs. Attached Figure Description

[0014] The utility model will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present utility model. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram from another perspective of the present invention; Figure 3 This is a cross-sectional view of the present invention; The components are as follows: 1. Housing; 11. Placement cavity; 12. Air inlet; 13. Exhaust outlet; 2. Sampling seat; 21. Sampling channel; 3. Sampling airbag; 4. Push seat; 41. Limiting rod; 5. Baffle; 51. Reset spring; 6. Push block; 61. Strip groove; 7. Circuit board; 71. Press switch; 72. Pressing component; 73. Limiting groove; 81. Head; 82. Rod part; 83. Threaded part. Detailed Implementation

[0016] The present invention will be further described in conjunction with the following embodiments.

[0017] Depend on Figures 1 to 3 As can be seen, the sampling-friendly testing instrument described in this embodiment includes a housing 1; a placement cavity 11 is provided inside the housing 1; an air inlet 12 communicating with the placement cavity 11 is provided inside the housing 11; a sampling seat 2 is provided inside the placement cavity 11; the sampling seat 2 is provided with a sampling airbag 3 and a pushing seat 4; one end of the sampling airbag 3 is fixedly connected to the sampling seat 2; the other end of the sampling airbag 3 is fixedly connected to the pushing seat 4; the pushing seat 4 is slidably disposed on the sampling seat 2; the sampling seat 2 is provided with a sampling channel 21; one end of the sampling channel 21 is connected to one end of the sampling airbag 3; the other end of the sampling channel 21 is connected to the placement cavity 11. A baffle 5 is fixedly installed inside the placement cavity 11; a return spring 51 is provided between the push seat 4 and the baffle 5; a push block 6 is provided on the top of the housing 1; the push block 6 is connected to the push seat 4.

[0018] Specifically, in this embodiment, the sampling-friendly testing instrument, before testing, pushes the seat 4 away from the sampling channel 21 under the action of the reset spring 51, at which time the airbag is in an deployed state. When testing is required, push the push block 6 towards the sampling channel 21, causing the push seat 4 to move towards the sampling channel 21, thereby compressing the airbag and expelling the gas inside. While maintaining this state, the user blows air into the airbag. After blowing for a period of time, the placement cavity 11 is filled with the gas to be tested. Then, push the push block 6 is released, and under the action of the reset spring 51, the push seat 4 moves away from the sampling channel 21, and the airbag gradually unfolds, thereby drawing the test gas in the placement cavity 11 into the airbag through the sampling channel 21 for sampling and testing.

[0019] This embodiment achieves the extension and retraction of the sampling airbag 3 through the mechanical cooperation of the push block 6, the push seat 4, and the return spring 51. This replaces the driving method of relying on electronic components such as air pumps and electromagnets in the prior art, greatly reducing the use of electronic components. This not only simplifies the overall structure of the tester but also reduces the manufacturing cost and assembly difficulty, making it easier for mass production. In addition, the failure rate of the mechanical transmission structure is much lower than that of electronic components, effectively avoiding the problem of air circuit control failure caused by the aging and failure of electronic components. This significantly improves the stability and reliability of the tester in long-term operation, extends the service life of the equipment, and reduces the later maintenance cost. Furthermore, since no electronic components are required to provide power, this embodiment does not require additional power to drive the air circuit control, greatly reducing the energy consumption of the equipment. For portable testers, this can significantly extend the battery life, making it more flexible in scenarios without external power supply and fully meeting diverse practical application needs. At the same time, this embodiment can complete the compression and degassing of the sampling airbag 3 by manually pushing the push block 6, and the airbag can be expanded and degassed by the elasticity of the return spring 51 after releasing the push block 6. The entire sampling process is simple and intuitive to operate, without complicated operation steps, effectively improving sampling efficiency and lowering the user's operating threshold.

[0020] This embodiment describes a sampling-friendly testing instrument, in which the housing 1 is provided with an exhaust port 13 communicating with the placement chamber 11. This design allows for the timely removal of excess gas from the placement chamber 11 when the user blows air, preventing excessively high internal pressure that could cause airflow turbulence. This ensures stable subsequent air extraction from the sampling airbag 3 and prevents abnormal air pressure from affecting sampling accuracy. Furthermore, it promotes gas circulation within the placement chamber 11, reduces residual interfering gas, and ensures that the gas entering the sampling airbag 3 is fresh gas to be tested, further improving the accuracy of the test results. Simultaneously, it avoids high-pressure gas causing compression damage to the housing 1 or internal components.

[0021] This embodiment describes a sampling-friendly testing instrument, in which a circuit board 7 is fixedly installed inside the placement cavity 11; the baffle 5 is fixedly connected to the circuit board 7; and the sampling seat 2 is fixedly connected to the circuit board 7. Through the above-described configuration, the circuit board 7 achieves integrated fixation of the baffle 5 and the sampling seat 2, eliminating the need for multiple independent fixing structures, simplifying the layout design within the housing 1, and significantly improving space utilization.

[0022] This embodiment describes a sampling-friendly testing instrument. The circuit board 7 has a push-button switch 71 on its top; the housing 1 has a push-button component 72 on its top; the push-button component 72 abuts against the push-button switch 71. With this configuration, the user can trigger the push-button switch 71 on the circuit board 7 by pressing the push-button component 72 on the top of the housing 1, conveniently activating the testing instrument and forming a linked operation process of push-button triggering and manual sampling, simplifying the overall operation steps and lowering the barrier to entry.

[0023] This embodiment describes a sampling-friendly testing instrument. The circuit board 7 has a limiting groove 73 extending through it along the sliding direction of the push seat 4. The push seat 4 has a limiting rod 41, which slidably rests within the limiting groove 73. The push block 6 is connected to the limiting rod 41. The cooperation between the limiting groove 73 and the limiting rod 41 provides precise guidance for the sliding of the push seat 4, ensuring that the push seat 4 always moves in a preset direction and preventing uneven force on the sampling airbag 3 due to displacement of the push seat 4.

[0024] The sampling-friendly testing instrument described in this embodiment has a strip groove 61 on the top of the housing 1 along the sliding direction of the pusher seat 4; the pusher block 6 is slidably disposed in the strip groove 61. The strip groove 61 guides the pusher block 6 to slide in a fixed direction, forming a double guiding structure with the limiting rod 41 and the limiting groove 73, further improving the accuracy of the sliding of the pusher seat 4 and preventing deviation and jamming when the user pushes the pusher block 6.

[0025] The sampling-friendly testing instrument described in this embodiment has a screw at the end of the push seat 4 furthest from the sampling airbag 3; the return spring 51 is located between the screw and the baffle 5. The screw provides stable axial support and positioning for the return spring 51, preventing the spring from shifting, twisting, or misaligning during extension and retraction, ensuring that the spring always exerts force along the sliding direction of the push seat 4, making the sliding of the push seat 4 smoother, thereby ensuring uniform extension and retraction of the sampling airbag 3 and preventing local damage to the airbag due to uneven force.

[0026] This embodiment describes a sampling-friendly testing instrument. The screw includes a rod portion 82, a threaded portion 83 at one end of the rod portion 82, and a head 81 at the other end of the rod portion 82. The end of the push seat 4 furthest from the sampling airbag 3 is threadedly connected to the threaded portion 83. The rod portion 82 passes through a baffle 5. The return spring 51 is located between the head 81 and the baffle 5. The threaded connection between the threaded portion 83 and the push seat 4 facilitates the disassembly and replacement of the screw. The rod portion 82 passing through the baffle 5 further guides the sliding of the screw and the push seat 4, enhancing the stability of the push seat 4's movement and preventing its shaking from affecting the air circuit's sealing. The head 81 effectively blocks the return spring 51, preventing the return spring 51 from falling off the rod portion 82 during extension.

[0027] In this embodiment, a testing instrument that facilitates sampling is provided, wherein the return spring 51 is sleeved outside the rod 82. This arrangement ensures a stable and reliable overall structure.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A testing instrument that facilitates sampling, characterized in that: The device includes a housing (1); a placement cavity (11) is provided inside the housing (1); an air inlet (12) communicating with the placement cavity (11) is provided inside the housing (11); a sampling seat (2) is provided inside the placement cavity (11); the sampling seat (2) is provided with a sampling airbag (3) and a push seat (4); one end of the sampling airbag (3) is fixedly connected to the sampling seat (2); the other end of the sampling airbag (3) is fixedly connected to the push seat (4); the push seat (4) is slidably disposed on the sampling seat (2); the sampling seat (2) is provided with a sampling channel (21); one end of the sampling channel (21) is connected to one end of the sampling airbag (3); the other end of the sampling channel (21) is connected to the placement cavity (11); A baffle (5) is fixedly provided inside the placement cavity (11); a return spring (51) is provided between the push seat (4) and the baffle (5); a push block (6) is provided on the top of the housing (1); the push block (6) is connected to the push seat (4).

2. The testing instrument for easy sampling according to claim 1, characterized in that: The housing (1) is provided with an exhaust port (13) that communicates with the placement cavity (11).

3. The testing instrument for easy sampling according to claim 1, characterized in that: A circuit board (7) is fixedly installed inside the placement cavity (11); the baffle (5) is fixedly connected to the circuit board (7); and the sampling seat (2) is fixedly connected to the circuit board (7).

4. The testing instrument for easy sampling according to claim 3, characterized in that: The circuit board (7) has a push switch (71) on its top; the housing (1) has a push member (72) on its top; the push member (72) abuts against the push switch (71).

5. The testing instrument for easy sampling according to claim 3, characterized in that: The circuit board (7) is provided with a limiting groove (73) through the sliding direction of the push seat (4); the push seat (4) is provided with a limiting rod (41); the limiting rod (41) is slidably disposed in the limiting groove (73); the push block (6) is connected to the limiting rod (41).

6. The testing instrument for easy sampling according to claim 1, characterized in that: The top of the housing (1) is provided with a strip groove (61) along the sliding direction of the push seat (4); the push block (6) is slidably disposed in the strip groove (61).

7. The testing instrument for easy sampling according to claim 1, characterized in that: The push seat (4) has a screw at the end away from the sampling airbag (3); the reset spring (51) is located between the screw and the baffle (5).

8. A testing instrument for easy sampling according to claim 7, characterized in that: The screw includes a rod (82), a threaded portion (83) at one end of the rod (82), and a head (81) at the other end of the rod (82); the end of the push seat (4) away from the sampling airbag (3) is threadedly connected to the threaded portion (83); the rod (82) passes through the baffle (5); and the reset spring (51) is located between the head (81) and the baffle (5).

9. A testing instrument for easy sampling according to claim 8, characterized in that: The return spring (51) is sleeved on the outside of the rod (82).

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