Detection tool for testing electrical performance of oxygen concentration tube

Abstract

The utility model belongs to the technical field of oxygen concentration tube electrical performance testing, and particularly relates to a detection tool for oxygen concentration tube electrical performance testing. A cavity is formed between the top plate and the bottom plate, and a containing groove is formed in the top plate. The circuit board is arranged in the cavity, and a connecting wire is reserved on the circuit board; the clamp assembly is arranged above the top plate; the conducting strips are arranged on the two clamp surfaces and are electrically connected with the connecting wire; one clamp surface in the clamp assembly is fixed, and the other clamp surface can move relative to the fixed clamp surface, so that guide pins at the two ends of the to-be-detected oxygen concentration tube are respectively clamped and fixed through the conducting strips and are electrically connected. According to the detection tool for testing the electrical performance of the oxygen concentration tube, the conducting strip is arranged in the clamp assembly for self-recovery locking, so that the oxygen concentration tube is convenient to take and place, the wiring procedure is omitted, good connection of connecting parts in the detection process is ensured, the operation time is saved, and the detection reliability is improved; the overall layout is reasonable, and detection operation is facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of oxygen concentration tube electrical performance testing technology, specifically relating to testing fixtures for oxygen concentration tube electrical performance testing. Background Technology

[0002] The main component in an oxygen concentrator for detecting oxygen concentration is the oxygen concentration tube, which is installed on the oxygen delivery pipeline. Ultrasonic sensor connectors are installed at both ends of the tube, and ultrasonic signals are alternately transmitted and received to measure the propagation time, which is then used for oxygen concentration calculation. In other words, the proper functioning of the oxygen concentration tube requires a good electrical connection so that the signal emitted by the ultrasonic sensor at one end can be received by the ultrasonic sensor at the other end, thus enabling the detection and transmission of oxygen concentration. Therefore, to ensure the product quality of the oxygen concentrator, the electrical performance of the oxygen concentration tube itself is tested during the manufacturing process.

[0003] The existing oxygen concentration tube structure features ultrasonic sensor connectors at both ends, an inlet, and an outlet. It typically includes a mounting plate with positioning bolt holes for secure connection to a circuit board. During testing, the ultrasonic sensor connectors at both ends need to be wired to the testing device, requiring four separate wiring operations, which is time-consuming. Furthermore, the inconvenient clamping of the oxygen concentration tube further complicates the wiring process. Therefore, to improve the ease of testing the electrical performance of the oxygen concentration tube, a suitable adaptive testing fixture is designed. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a testing fixture for testing the electrical performance of oxygen concentration tubes.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a testing fixture for testing the electrical performance of oxygen concentration tubes, comprising:

[0006] Base plate;

[0007] A top plate is installed above the bottom plate and forms a cavity between them. The top plate is provided with a placement groove that matches the mounting plate of the positioning bolt hole on the tube to be tested for oxygen concentration.

[0008] A circuit board is placed in the cavity, and a connecting wire for connecting the end guide needle of the oxygen concentration tube is provided on it;

[0009] A pair of clamping assemblies are symmetrically arranged above the top plate, and each clamping assembly has two clamping surfaces;

[0010] A conductive sheet is disposed on the two clamp surfaces and electrically connected to the connecting line;

[0011] In each of the clamping assemblies, one clamping surface is fixed, and the other clamping surface is movable relative to the fixed clamping surface, so as to clamp the guide pins at both ends of the tube to be tested for oxygen concentration through the conductive sheet and form an electrical connection.

[0012] Furthermore, the clamp assembly includes:

[0013] A limiting plate is vertically fixed above the top plate and arranged along the axis of the placement groove, with the fixed clamping surface located on the limiting plate;

[0014] The movable plate has an elastic element inside, one end of which is fixed to a fixed base and the other end is fixed to a sliding plate, with a movable clamping surface located on the sliding plate.

[0015] Furthermore, the elastic element is a spring.

[0016] Furthermore, the clamping assembly also includes a guide rod, one end of which is connected to the slide plate, and the other end is slidably fitted with an opening on the fixed base, and the spring is sleeved on the guide rod.

[0017] Furthermore, the original length of the spring is not less than H; H is the distance between the sliding plate and the fixed base when the sliding plate contacts the limiting plate.

[0018] Furthermore, the original length of the spring is H to 1.08H.

[0019] Furthermore, the limiting plate and the sliding plate are respectively provided with arc-shaped guide structures on the upper side of their opposite sides.

[0020] Furthermore, the fixture surface is provided with a conductive sheet slot for placing the conductive sheet.

[0021] Furthermore, both sides of the top plate are provided with openings for providing the connecting wires for routing.

[0022] Furthermore, it also includes: a window, which is opened on the top plate, and a switch and an indicator light are provided on the circuit board at the location of the window.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] 1. Provide testing fixtures for testing the electrical performance of oxygen concentration tubes. The oxygen concentration tube is fixed together by the placement slot and clamp assembly. The clamp surface is provided with conductive plates. The wiring is completed by placing and clamping the tube, eliminating the wiring process and facilitating the rapid implementation of electrical performance testing.

[0025] 2. The testing fixture is equipped with multiple sets of clamping components. Each clamping component utilizes the self-recovering property of elastic parts to lock the guide pin and ensure a good connection between the guide pin and the conductive sheet, thereby ensuring the relative stability of the connection parts during the testing process and improving the reliability of the testing.

[0026] 3. The top panel has an opening for easy wiring and connection, and windows for easy installation of switches and indicator lights, resulting in a reasonable structural layout.

[0027] 4. The arc-shaped guide structure design on the slider and limit plate improves the ease of operation;

[0028] 5. The conductive sheet slot is designed so that the conductive sheet is hidden in the conductive sheet slot. During the assembly, movement and use of the testing fixture, the conductive sheet can be prevented from colliding and rubbing, which can protect the smoothness and integrity of its conductive surface and improve the stability of the testing fixture.

[0029] In summary, this utility model provides a testing fixture for testing the electrical performance of oxygen concentration tubes. The self-resetting locking clamp assembly is equipped with a conductive sheet, which facilitates the handling of oxygen concentration tubes, eliminates the wiring process, ensures good connection of the connection parts during the testing process, saves operation time, and improves testing reliability. The open design facilitates wiring, and the overall layout is reasonable, making the testing operation convenient. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the oxygen concentration tube.

[0031] Figure 2 This is a schematic diagram of the testing fixture in this utility model;

[0032] Figure 3 This is a front view of the testing fixture in this utility model;

[0033] Figure 4 for Figure 3 Sectional view at point AA;

[0034] Figure 5 This is a cross-sectional view of the clamp assembly in Example 1;

[0035] Figure 6 This is a cross-sectional view of the clamp assembly in Example 2;

[0036] Figure 7 This is a schematic diagram showing the oxygen concentration tube to be tested installed in the testing fixture in its completed state.

[0037] In the picture:

[0038] 1. Base plate, 2. Top plate, 3. Cavity, 4. Circuit board, 5. Conductive sheet, 6. Oxygen concentration tube to be tested, 201. Placement slot, 202. Limiting plate, 203. Slide plate, 204. Elastic element, 205. Fixed base, 206. Guide rod, 207. Arc guide structure, 208. Conductive sheet slot, 209. Opening, 210. Window, 401. Air inlet, 402. Air outlet, 403. Ultrasonic A end, 404. Ultrasonic B end, 405. Positioning bolt hole mounting plate, 406. Guide pin;

[0039] Figure 3 BB in the middle represents the cross-section of the fixture assembly. Detailed Implementation

[0040] To facilitate understanding of this utility model, it will be described in more detail below with reference to the accompanying drawings and specific embodiments. However, this utility model can be implemented in many different forms and is not limited to the embodiments described in this specification. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0041] The structure and function of the detection fixture are explained by referring to the structure of the oxygen concentration tube. Chinese Patent No. CN214539381U discloses an ultrasonic oxygen concentration measuring component. The structure of the oxygen concentration tube is understood by referring to this patent. The oxygen concentration tube has an inlet 401 and an outlet 402, and ultrasonic A-end 403 and ultrasonic B-end 404 at each end. A pair of guide needles 406 are respectively provided on the ultrasonic A-end 403 and ultrasonic B-end 404. The oxygen concentration tube also has a positioning pin hole mounting plate 405. Figure 1 understand.

[0042] The structure of the oxygen concentration tube provided in this application is for the purpose of illustrating the function of the testing fixture and does not constitute a limitation on the structure and specific application of the testing fixture.

[0043] Combination Figure 2-4 The testing fixture for testing the electrical performance of an oxygen concentration tube includes: a base plate 1; a top plate 2, mounted above the base plate 1, forming a cavity 3 between the top plate 2 and the base plate 1, the top plate 2 having a placement groove 202 adapted to the mounting plate 405 for the positioning bolt hole on the oxygen concentration tube 6 to be tested; a circuit board 4, placed in the cavity 3, having a connecting line for connecting the guide pins at the end of the oxygen concentration tube 6 to be tested; a pair of clamping assemblies, symmetrically arranged above the top plate 2, each clamping assembly having two clamping surfaces; and conductive sheets 5, disposed on the two clamping surfaces and electrically connected to the connecting line; one clamping surface in each clamping assembly is fixed, and the other clamping surface is movable relative to the fixed clamping surface, so that the conductive sheets 5 are used to clamp the guide pins 406 at both ends of the oxygen concentration tube 6 to be tested and form an electrical connection.

[0044] Usage: During testing, the oxygen concentration tube 6 to be tested needs to be placed in the placement slot 202. Simultaneously, the clamping assembly is opened to hold the guide pin 406. The movable clamping surface is moved closer to the fixed clamping surface, allowing the guide pin 406 to establish an electrical connection with the circuit board 4 through electrical connection with the conductive sheet 5. Then, it can be tested whether the signal emitted by the ultrasonic A end 403 or the ultrasonic B end 404 can be received by the other end. During placement, the installation trajectory of the oxygen concentration tube 6 to be tested is parallel, and it is pushed horizontally into the testing fixture. The placement and clamping of the oxygen concentration tube 6 completes the wiring between it and the testing fixture, eliminating the wiring process and facilitating rapid implementation of the electrical performance testing of the oxygen concentration tube 6. During installation, the positioning bolt hole mounting plate 405 not only allows for quick and accurate positioning of the oxygen concentration tube 6 but also provides fixation, ensuring that the oxygen concentration tube 6 does not detach from the testing fixture during the testing process.

[0045] Example 1: Combination Figure 1-5 and Figure 7 The testing fixture used for testing the electrical performance of oxygen concentration tubes includes a base plate 1 with side walls on all four sides, forming a cavity 3 between the base plate 1 and the top plate 2 above it. The cavity 3 houses the circuit board 4 and a battery assembly providing power for the test. The circuit board 4 controls and detects whether the circuit connections of the oxygen concentration tube 6 under test are intact. The middle portion of the top plate 2 has a placement groove 202 that matches the mounting plate 405 with the positioning bolt hole on the oxygen concentration tube 6 under test, facilitating the operator's placement of the tube by hand and providing a mounting surface for the fingers. Simultaneously, it is positioned in conjunction with the positioning bolt hole mounting plate 405 of the oxygen concentration tube 6 to be tested; the clamp assembly includes: a limiting plate 202, vertically fixed above the top plate 2, arranged along the axis of the placement groove 202, with the fixed clamp surface located on the limiting plate 202; a movable plate, in which an elastic element 204 is provided, one end of the elastic element 204 being fixed to the fixed base 205, and the other end being fixed to the sliding plate 203, with the movable clamp surface located on the sliding plate 203; conductive sheets 5 are respectively provided on the two clamp surfaces. Relying on the self-recovering property of the elastic element 204, after the oxygen concentration tube 6 to be tested is placed, it elastically resets and locks, so that the guide needle 406 has a good electrical connection with the conductive sheet 5.

[0046] Example 2: Based on the structure of Example 1, and further combined with... Figure 6It is understood that a guide rod 206 is connected to the opposite side of the sliding plate 203 and the movable clamping surface, forming a "T" shape. The elastic element 204 is sleeved on the guide rod 206, and the other end of the guide rod 206 is slidably fitted with a hole on the fixed base 205. When the oxygen concentration tube 6 to be tested is placed, a force is applied to open the clamping assembly. Under the action of external force, the sliding plate 203 moves away from the limiting plate 202, and the guide rod 206 extends outward. At this time, the elastic element 204 is compressed, and its elastic potential energy increases. When the external force is removed, the elastic element 204 automatically returns to its original position, driving the sliding plate 203 and the guide rod 206 to move towards the limiting plate 202, clamping the guide needle 406 and making it contact and connect with the conductive sheet 5.

[0047] In one embodiment, the elastic element 204 is a spring, and the original length of the spring is not less than H; H is the distance between the sliding plate 203 and the fixed base 205 when the sliding plate 203 contacts the limiting plate 202. The original length of the spring is H to 1.08H. With a suitable original length, relying on the spring's restoring ability, the clamping assembly can clamp, so that the guide pin 406 and the conductive sheet 5 have good contact connection. At the same time, the force on each component is small, and it will not cause damage due to force.

[0048] In one embodiment, the limiting plate 202 and the sliding plate 203 are respectively provided with arc-shaped guide structures 207 on the upper side of opposite sides. During placement, the oxygen concentration tube 6 to be tested is inserted from top to bottom, and the arc-shaped guide structure 207 has a guiding function to facilitate the insertion of the guide needle 406.

[0049] In one embodiment, the fixture surface is provided with a conductive sheet slot 208 for placing the conductive sheet 5. The conductive sheet 5 is concealed in the conductive sheet slot 208, which can prevent the conductive sheet 5 from colliding and rubbing during the assembly, movement and use of the testing fixture, thus protecting the smoothness and integrity of its conductive surface and improving the stability of the testing fixture.

[0050] In one embodiment, the top plate 2 has openings 209 on both sides for providing wiring for the connecting lines. This facilitates the routing of the connecting lines between the circuit board 4 and the conductive sheet 5.

[0051] In one embodiment, the circuit board 4 is also equipped with a switch and an indicator light. To facilitate the placement of the switch and indicator light, a window 210 is provided on the top plate 2, which can be located in the lower right corner. The indicator light is used to indicate whether the oxygen concentration tube 6 to be tested is qualified.

[0052] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A testing fixture for testing the electrical performance of oxygen concentration tubes, characterized in that, include: Base plate; A top plate is installed above the bottom plate and forms a cavity between them. The top plate is provided with a placement groove that is compatible with the positioning bolt hole mounting plate on the tube to be tested for oxygen concentration. A circuit board is placed in the cavity, and a connecting wire for connecting the end guide needle of the oxygen concentration tube is provided on it; A pair of clamping assemblies are symmetrically arranged above the top plate, and each clamping assembly has two clamping surfaces; A conductive sheet is disposed on the two clamp surfaces and electrically connected to the connecting line; In each of the clamping assemblies, one clamping surface is fixed, and the other clamping surface is movable relative to the fixed clamping surface, so as to clamp the guide pins at both ends of the tube to be tested for oxygen concentration through the conductive sheet and form an electrical connection.

2. The testing fixture for testing the electrical performance of oxygen concentration tubes according to claim 1, characterized in that, The clamp assembly includes: A limiting plate is vertically fixed above the top plate and arranged along the axis of the placement groove, with the fixed clamping surface located on the limiting plate; The movable plate has an elastic element inside, one end of which is fixed to a fixed base and the other end is fixed to a sliding plate, with a movable clamping surface located on the sliding plate.

3. The testing fixture for testing the electrical performance of oxygen concentration tubes according to claim 2, characterized in that, The elastic element is a spring.

4. The testing fixture for testing the electrical performance of oxygen concentration tubes according to claim 3, characterized in that, The clamping assembly further includes a guide rod, one end of which is connected to the slide plate, and the other end is slidably fitted with an opening on the fixed base, and the spring is sleeved on the guide rod.

5. The testing fixture for testing the electrical performance of oxygen concentration tubes according to claim 3, characterized in that, The original length of the spring is not less than H; H is the distance between the sliding plate and the fixed base when the sliding plate contacts the limiting plate.

6. The testing fixture for testing the electrical performance of oxygen concentration tubes according to claim 5, characterized in that, The original length of the spring is H to 1.08H.

7. The testing fixture for testing the electrical performance of oxygen concentration tubes according to claim 2, characterized in that, The limiting plate and the sliding plate are respectively provided with arc-shaped guide structures on the upper side of their opposite sides.

8. The testing fixture for testing the electrical performance of oxygen concentration tubes according to claim 1, characterized in that, The fixture surface is provided with a conductive sheet slot for placing the conductive sheet.

9. The testing fixture for testing the electrical performance of oxygen concentration tubes according to claim 1, characterized in that, Both sides of the top plate are provided with openings for providing the connecting wires for routing.

10. The testing fixture for testing the electrical performance of oxygen concentration tubes according to claim 1, characterized in that, Also includes: A window is provided on the top plate, and a switch and indicator light are provided on the circuit board at the location of the window.

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