Anti-cracking buffer elbow for lung function instrument

Abstract

The utility model relates to a lung function detector technical field, concretely relates to a kind of anti-cracking buffer elbow for lung function instrument, including upper hard pipe, lower hard pipe and center hose, center hose is bent structure, upper hard pipe is set in the top outer edge of center hose and is fixedly connected with center hose, lower hard pipe is set in the bottom outer edge of center hose and is fixedly connected with center hose.The anti-cracking buffer elbow is set by center hose, when patient blows air body inertia, center hose can effectively absorb mechanical stress by self elastic deformation, to block pressure transmission path, avoid the cracking phenomenon caused by stress concentration in upper hard pipe.The elbow upper hard pipe top is provided with opening and throat clamp, only need to loosen fixed screw during daily maintenance disassembly process, the nondestructive separation of elbow can be realized, effectively avoids the structural crack risk caused by traditional pulling type disassembly.

Description

Technical Field

[0001] This utility model relates to the field of pulmonary function testing instrument technology, specifically to a crack-resistant buffer elbow for pulmonary function testing instruments. Background Technology

[0002] The existing airway connection device for pulmonary function testing instruments rigidly connects the machine's sensor inlet to the patient's filter outlet, forming a complete airway system consisting of a mouthpiece, filter, connecting elbow, and sensor. Before the test, the physician manually adjusts and fixes the mouthpiece to a suitable height to ensure the patient can undergo the test in a comfortable sitting position. However, in clinical practice, many patients experience cracking at the connection area between the elbow and the sensor inlet during forced vital capacity (FVC) testing due to the downward pressure caused by the body's inertia during forced exhalation, which forces the connecting elbow to withstand continuous deformation pressure.

[0003] Furthermore, the device requires daily disassembly and disinfection. Its rigid plastic connection structure is prone to mechanical fatigue during frequent insertion and removal operations, causing periodic structural cracks to appear in the connection area between the elbow and the sensor air inlet (average replacement cycle 2-3 months). These cracks directly compromise the airtightness of the air circuit system, affecting not only the accuracy of the test data but also increasing the maintenance costs for medical institutions due to frequent component replacements. At the same time, the elbow with its rigid connection structure is more difficult to disassemble, impacting daily work efficiency.

[0004] Therefore, a crack-resistant, buffer-type elbow for pulmonary function testing needs to be designed. This elbow effectively disperses the mechanical stress generated by the patient's downward pressure through a buffer structure design, reducing the rigid load between the elbow and the sensor interface. Furthermore, by optimizing the disassembly mechanism and employing a low-resistance assembly structure and quick-locking technology, structural damage caused by traditional forceful removal is avoided. These technological improvements significantly extend the elbow's service life while ensuring the airtightness of the testing system and operational and maintenance efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a crack-resistant buffer elbow for use in pulmonary function instruments.

[0006] To achieve this objective, the present invention adopts the following technical solution: A crack-resistant buffer elbow for a pulmonary function instrument is provided, comprising an upper rigid tube, a lower rigid tube, and a central flexible tube. The central flexible tube has a bent structure. The upper rigid tube is sleeved on the top outer edge of the central flexible tube and fixedly connected to the central flexible tube. The lower rigid tube is sleeved on the bottom outer edge of the central flexible tube and fixedly connected to the central flexible tube.

[0007] Furthermore, an upper thickened support and a lower thickened support are provided between the upper rigid tube and the lower rigid tube. The upper thickened support and the lower thickened support are integrally formed with the central flexible tube, and the left and right ends of the upper thickened support and the lower thickened support are fixedly connected to the upper rigid tube and the lower rigid tube, respectively.

[0008] Furthermore, a hose clamp is fitted on the top of the upper rigid tube, and at least two strip-shaped notches are opened along the circumferential direction on the top of the upper rigid tube. The inner diameter of the top of the central hose is larger than the sensor air inlet that needs to be inserted or removed.

[0009] Furthermore, the end of the upper rigid pipe is provided with an annular boss, and a limiting groove is opened on the outer edge of the annular boss for the steel strip of the hose clamp to be inserted into, and a strip-shaped notch penetrates the cross-section of the annular boss.

[0010] Furthermore, the outer edge of the lower rigid tube has a conical structure.

[0011] Furthermore, the two ends of the central flexible tube are respectively provided with an upper annular step and a lower annular step. The inner edge of the upper rigid tube is provided with a receiving groove 1 for the upper annular step to be inserted into, and the inner edge of the lower rigid tube is provided with a receiving groove 2 for the lower annular step to be inserted into.

[0012] Furthermore, a retaining plate is fixed to the end of the screw of the hose clamp.

[0013] Furthermore, the connection between the annular boss and the upper rigid tube is an arc structure.

[0014] The beneficial effects of this utility model are as follows: The anti-cracking buffer elbow for pulmonary function instruments, by setting a central hose, can effectively absorb mechanical stress through its own elastic deformation when the patient blows air forcefully and the body presses down, thereby blocking the pressure transmission path and avoiding cracking of the upper rigid tube due to stress concentration.

[0015] Because the inner diameter of the top of the central flexible hose is larger than the sensor inlet that needs to be inserted or removed, the elbow experiences less resistance when fitted onto the sensor inlet. After fitting, the elbow is tightened by rotating the screws on the hose clamp, causing the end of the upper rigid tube to be squeezed inward. The central flexible hose inside the upper rigid tube tightly wraps around the sensor inlet, preventing air leakage. Furthermore, during daily maintenance and disassembly, the elbow can be easily separated without damage by simply loosening the fixing screws, effectively avoiding the structural cracking risk caused by traditional pull-out disassembly. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments of this utility model will be briefly introduced below.

[0017] Figure 1 This is an exploded view of the three-dimensional structure of the present invention. Figure 1 ; Figure 2 This is an exploded view of the three-dimensional structure of the present invention. Figure 2 ; Figure 3 This is a cross-sectional view of the present invention; Figure 4 for Figure 3 Enlarged view of a portion at point A; Figure 5 This is a three-dimensional structural diagram of a bent pipe installed at the sensor air inlet in the existing technology; Figure 6 A three-dimensional structural diagram of a pipe after cracks have formed in the bend. In the diagram: 1. Upper rigid pipe; 1a. Annular boss; 1a1. Limiting groove; 1a2. Strip notch; 2. Lower rigid pipe; 3. Central flexible hose; 3a. Upper thickened support; 3b. Lower thickened support; 3c. Upper annular step; 3d. Lower annular step; 4. Hose clamp; 4a. Clamping plate. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product.

[0020] Reference Figures 1 to 6 The diagram shows a crack-resistant, buffer-type elbow for a pulmonary function testing instrument, comprising an upper rigid tube 1, a lower rigid tube 2, and a central flexible tube 3. The central flexible tube 3 has a bent structure. The upper rigid tube 1 is fitted onto the top outer edge of the central flexible tube 3 and fixedly connected to it. The lower rigid tube 2 is fitted onto the bottom outer edge of the central flexible tube 3 and fixedly connected to it. By placing the central flexible tube 3 between the upper rigid tube 1 and the lower rigid tube 2, when the patient forcefully blows air, even with the body's inertial downward pressure, the central flexible tube 3 will undergo slight deformation, preventing downward pressure from being transmitted to the upper rigid tube 1, thus preventing cracking at the upper rigid tube 1. The upper rigid tube 1 and the lower rigid tube 2 support the diameter of the central flexible tube 3, making the structure of the central flexible tube 3 more stable. The central flexible tube 3 is made of memory rubber, which is slightly harder, only needing to meet the requirement of having a lower hardness than the lower rigid tube 2, thus reducing pressure transmission.

[0021] An upper thickened support portion 3a and a lower thickened support portion 3b are provided between the upper rigid tube 1 and the lower rigid tube 2. Both the upper thickened support portion 3a and the lower thickened support portion 3b are integrally formed with the central flexible tube 3, and their left and right ends are fixedly connected to the upper rigid tube 1 and the lower rigid tube 2. By providing the upper thickened support portion 3a and the lower thickened support portion 3b, the support force of the central flexible tube 3 at the bend is strengthened, preventing the central flexible tube 3 from bending downwards along the bend when the patient applies slight downward force. The thickness of the upper thickened support portion 3a and the lower thickened support portion 3b can be increased according to actual needs to further enhance the support force.

[0022] A hose clamp 4 is fitted onto the top of the upper rigid tube 1. At least two strip-shaped notches 1a2 are cut along the circumference of the top of the upper rigid tube 1. The inner diameter of the top of the central flexible tube 3 is larger than the sensor inlet to be inserted or removed, with the larger diameter being 1-2 mm. Because of the slightly larger diameter, the resistance is lower when the elbow is fitted onto the sensor inlet. After fitting, the screws on the hose clamp 4 are rotated and tightened, causing the end of the upper rigid tube 1 to be squeezed inward. The central flexible tube 3 inside the upper rigid tube 1 tightly wraps around the sensor inlet, preventing air leakage. Furthermore, during daily maintenance and disassembly, the elbow can be separated without damage simply by loosening the fixing screws, effectively avoiding the structural crack risk caused by traditional pull-out disassembly.

[0023] An annular boss 1a is provided at the end of the upper rigid pipe 1. A limiting groove 1a1 is formed on the outer edge of the annular boss 1a for the steel strip of the hose clamp 4 to be inserted. A strip-shaped notch 1a2 penetrates the cross-section of the annular boss 1a. By providing the annular boss 1a, the limiting groove 1a1 can be formed, which plays a limiting role in the hose clamp 4 and prevents the hose clamp 4 from slipping off. Moreover, when the hose clamp 4 is tightened, the end of the upper rigid pipe 1 is thickened, which increases its strength and prevents cracking.

[0024] The outer edge of the lower rigid tube 2 has a conical structure, which allows for better insertion of the filter end.

[0025] The central flexible tube 3 has an upper annular step 3c and a lower annular step 3d at both ends. The inner edge of the upper rigid tube 1 has a receiving groove for the upper annular step 3c to engage, and the inner edge of the lower rigid tube 2 has a receiving groove for the lower annular step 3d to engage. The upper annular step 3c and lower annular step 3d enhance the connection between the central flexible tube 3 and the upper and lower rigid tubes 1 and 2. Furthermore, the upper annular step 3c thickens the end of the central flexible tube 3, resulting in a better compression sealing effect.

[0026] The screw end of the laryngeal clamp 4 is fixed with a retaining plate 4a, which allows doctors to remove it more easily during daily removal.

[0027] The connection between the annular boss 1a and the upper rigid tube 1 is an arc structure.

[0028] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A crack-resistant buffer elbow for a pulmonary function instrument, characterized in that, It includes an upper rigid tube (1), a lower rigid tube (2) and a central flexible tube (3). The central flexible tube (3) has a bent structure. The upper rigid tube (1) is fitted on the top outer edge of the central flexible tube (3) and is fixedly connected to the central flexible tube (3). The lower rigid tube (2) is fitted on the bottom outer edge of the central flexible tube (3) and is fixedly connected to the central flexible tube (3).

2. The anti-cracking buffer elbow for a pulmonary function instrument as described in claim 1, characterized in that, An upper thickened support part (3a) and a lower thickened support part (3b) are provided between the upper rigid tube (1) and the lower rigid tube (2). The upper thickened support part (3a) and the lower thickened support part (3b) are integrally formed with the central flexible tube (3), and the left and right ends of the upper thickened support part (3a) and the lower thickened support part (3b) are fixedly connected to the upper rigid tube (1) and the lower rigid tube (2).

3. The anti-cracking buffer elbow for a pulmonary function instrument as described in claim 1, characterized in that, The top of the upper rigid tube (1) is fitted with a hose clamp (4), and the top of the upper rigid tube (1) has at least two strip-shaped notches (1a2) along the circumferential direction. The inner diameter of the top of the central hose (3) is larger than the sensor inlet that needs to be inserted or removed.

4. The anti-cracking buffer elbow for a pulmonary function instrument as described in claim 3, characterized in that, The end of the upper rigid pipe (1) is provided with an annular boss (1a). A limiting groove (1a1) for the steel strip of the hose clamp (4) to be inserted is provided on the outer edge of the annular boss (1a). A strip notch (1a2) penetrates the cross section of the annular boss (1a).

5. The anti-cracking buffer elbow for a pulmonary function instrument as described in claim 1, characterized in that, The outer edge of the lower rigid tube (2) is a conical structure.

6. The anti-cracking buffer elbow for a pulmonary function instrument as described in claim 1, characterized in that, The two ends of the central flexible tube (3) are respectively provided with an upper annular step (3c) and a lower annular step (3d). The inner edge of the upper rigid tube (1) is provided with a receiving groove 1 for the upper annular step (3c) to be inserted into, and the inner edge of the lower rigid tube (2) is provided with a receiving groove 2 for the lower annular step (3d) to be inserted into.

7. The anti-cracking buffer elbow for a pulmonary function instrument as described in claim 1, characterized in that, The screw end of the hose clamp (4) is fixed with a clamping plate (4a).

8. A crack-resistant buffer elbow for a pulmonary function instrument as described in claim 4, characterized in that, The connection between the annular boss (1a) and the upper rigid tube (1) is an arc structure.

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