A stethoscope assembly platform
By designing a tube expander for the stethoscope assembly platform, and utilizing a rotating wheel and pull-pin structure to expand the rubber tubing, the problem of difficult assembly of traditional stethoscopes was solved, enabling rapid connection between the earring and the three-way fitting, and improving assembly efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TAIHU HUAMEI MEDICAL EQUIP CO LTD
- Filing Date
- 2025-07-23
- Publication Date
- 2026-07-17
AI Technical Summary
When connecting the rubber tubing of a traditional stethoscope to the ear loop and the T-joint, the difference in diameter makes assembly difficult and increases insertion resistance, reducing assembly efficiency.
A stethoscope assembly platform was designed, which includes a tube expander consisting of two sets of rotating wheels, a cantilever, a pull pin, and other structures. The rotating wheels are driven to rotate synchronously by a cylinder, and the pull pin is used to expand the end of the rubber hose to achieve the rapid insertion of earrings or T-joints.
It improves the assembly efficiency of stethoscopes, simplifies the connection process between earrings and T-joints, and enhances assembly efficiency.
Smart Images

Figure CN224509565U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of stethoscope manufacturing technology, and in particular to a stethoscope assembly platform. Background Technology
[0002] A stethoscope is a common tool used by doctors to diagnose diseases. It can amplify the sounds of internal organs. A traditional stethoscope mainly consists of a chest piece, a tubing, and an ear piece. The chest piece is in contact with the body and collects the sounds of organs such as the heart and lungs. The tubing transmits the sound, and the ear piece is close to the doctor's ear.
[0003] The stethoscope's earpiece consists of an earring and a three-way connector. The earring and the three-way connector, as well as the three-way connector and the chest piece, are connected via flexible rubber tubing. When manually connecting these components, the diameters of the earring and the three-way connector are generally larger than the diameter of the rubber tubing. This allows the tubing to deform and be inserted into one end of the earring or the three-way connector. Because the rubber tubing is soft and easily deformed, precise alignment of the connectors is crucial; slight misalignment will prevent insertion. Furthermore, the resistance to inserting the tubing into the earring or the three-way connector increases with insertion depth, further reducing the stethoscope's assembly efficiency. Utility Model Content
[0004] The purpose of this invention is to provide a stethoscope assembly platform that can effectively solve the problems in the background art.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A stethoscope assembly platform includes a workbench with a retractor. The retractor includes two wheels with multiple cantilever arms mounted on them. The cantilever arms are movably connected to the wheels via pins. A first leg is fixedly mounted at one end of each cantilever arm, and the bottom of the first leg is fixedly mounted on the workbench. Protective covers are fixedly mounted on the multiple cantilever arms, and a connecting beam is fixedly mounted between two of the protective covers. A connecting rod is movably mounted on the rear side of the connecting beam. A second leg is also fixedly mounted on the workbench next to one of the first legs, and a cylinder is fixedly mounted on one side of the second leg. The cylinder is connected to an external air pump via an air pipe.
[0007] As a further preferred embodiment of this utility model, a tube insertion groove is provided inside the rotating wheel, and multiple guide grooves are provided inside the rotating wheel. The guide grooves have an arc-shaped transverse cross section. The tube insertion groove allows the stethoscope's ear loop or the end of the three-way connector to be inserted into it, thereby facilitating insertion into the rubber hose.
[0008] As a further preferred embodiment of this utility model, a plurality of first tooth blocks are fixedly installed on the outer side of the rotating wheel.
[0009] As a further preferred embodiment of this utility model, a first sliding groove is provided in the cantilever, and a slider is fixedly installed at one end of the pull pin. The slider is slidably connected in the first sliding groove, and one end of the pull pin near the slider is also inserted into a corresponding guide groove. When the rotating wheel rotates axially, it will cause the rotating wheel to drive multiple guide grooves to rotate at the corresponding pull pin end, thereby causing the pull pin to drive the slider to move radially in the first sliding groove. This allows multiple pull pins to pull open and expand one end of the rubber hose, making it easier to insert the stethoscope ear or T-joint end into the rubber hose for quick assembly.
[0010] As a further preferred embodiment of this utility model, the protective cover has a through groove with the same transverse cross-section as the tube placement groove.
[0011] As a further preferred embodiment of this utility model, two guide rails are fixedly installed on the rear side of the connecting beam, and the longitudinal cross-section of the guide rails is T-shaped.
[0012] As a further preferred embodiment of this utility model, a plurality of second tooth blocks are fixedly installed on one side of the connecting rod relative to the rotating wheel. Two second sliding grooves are opened in the connecting rod. The connecting rod is slidably connected to two guide rails through the second sliding grooves. The plurality of second tooth blocks are meshed with the corresponding first tooth blocks. One end of the connecting rod is also fixedly connected to one end of the piston rod of the cylinder. A plurality of second tooth blocks are arranged on one side of the connecting rod and distributed near the corresponding rotating wheel, so that the two rotating wheels can be synchronously rotated in conjunction with the cylinder.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] In this invention, a tube expander is set on the workbench, and the tube expander consists of two sets of rotating wheels, cantilever, pull pins and other structures. The two rotating wheels are connected by a connecting rod, so that the two rotating wheels can rotate synchronously with the push and pull force of the cylinder. Then, multiple pull pins at the bottom of the rotating wheels move radially in different directions at the same time, so that the pull pins can expand the rubber hose port, realize the quick insertion of the stethoscope ear ring or one end of the T-joint, and improve the stethoscope assembly efficiency. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the main structure of this utility model.
[0016] Figure 2 This is a schematic diagram of the tube expander structure of this utility model.
[0017] Figure 3 This is a rear view of the expander of this utility model.
[0018] Figure 4This is a schematic diagram of the connection structure between the rotating wheel, cantilever, and pull pin of this utility model.
[0019] Figure 5 This is a cross-sectional view of the cantilever and pull pin of this utility model.
[0020] In the diagram: 1. Workbench; 2. Pipe expander; 3. Rotary wheel; 4. Cantilever; 5. Pull pin; 6. First leg; 7. Protective cover; 8. Connecting beam; 9. Connecting rod; 10. Second leg; 11. Cylinder; 12. First toothed block; 13. Pipe placement groove; 14. First slide groove; 15. Slider; 16. Guide rail; 17. Second toothed block; 18. Second slide groove; 19. Guide groove. Detailed Implementation
[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0022] like Figures 1-5 As shown, the stethoscope assembly platform provided by this utility model includes a workbench 1, on which a retractor 2 is provided. The retractor 2 includes two rotating wheels 3, and multiple cantilever arms 4 are provided on the rotating wheels 3. The cantilever arms 4 and the rotating wheels 3 are movably connected by a pull pin 5. A first leg 6 is fixedly installed at one end of the cantilever arm 4. The bottom of the first leg 6 is fixedly installed on the workbench 1. Protective covers 7 are fixedly installed on the multiple cantilever arms 4. A connecting beam 8 is fixedly installed between two protective covers 7. A connecting rod 9 is movably installed on the rear side of the connecting beam 8. A second leg 10 is also fixedly installed on the workbench 1 located on one side of one of the first legs 6. A cylinder 11 is fixedly installed on one side of the second leg 10. The cylinder 11 is connected to an external air pump through an air pipe.
[0023] like Figures 2-5 As shown, the rotating wheel 3 has a tube insertion groove 13 and multiple guide grooves 19. The guide grooves 19 have an arc-shaped transverse cross-section. The tube insertion groove 13 allows the stethoscope's ear loop or T-joint end to pass through it, thus facilitating insertion into the rubber hose. Multiple first tooth blocks 12 are fixedly installed on the outside of the rotating wheel 3. The cantilever 4 has a first sliding groove 14. One end of the pull pin 5 is fixedly installed with a slider 15. The slider 15 is slidably connected in the first sliding groove 14. One end of the pull pin 5 is also inserted into the corresponding guide groove 19 near the slider 15. When the rotating wheel 3 rotates axially, it will cause the multiple guide grooves 19 to rotate at the corresponding pull pin 5 end, thereby causing the pull pin 5 to drive the slider 15 to move radially in the first sliding groove 14. This allows the multiple pull pins 5 to pull open and expand one end of the rubber hose, making it easier to insert the stethoscope's ear loop or T-joint end into the rubber hose, achieving quick assembly. The protective cover 7 has a groove with the same transverse cross-section as the tube insertion groove 13.
[0024] like Figure 3 As shown, two guide rails 16 are fixedly installed on the rear side of the connecting beam 8. The longitudinal section of the guide rail 16 is T-shaped. Multiple second tooth blocks 17 are fixedly installed on one side of the connecting rod 9 relative to the rotating wheel 3. Two second sliding grooves 18 are opened in the connecting rod 9. The connecting rod 9 is slidably connected to the two guide rails 16 through the second sliding grooves 18. The multiple second tooth blocks 17 are meshed with the corresponding first tooth blocks 12. One end of the connecting rod 9 is also fixedly connected to one end of the piston rod of the cylinder 11. Multiple second tooth blocks 17 are set on one side of the connecting rod 9 and distributed near the corresponding rotating wheel 3, so that the two rotating wheels 3 can be rotated synchronously in conjunction with the cylinder 11.
[0025] It should be noted that this utility model is a stethoscope assembly platform. In use, one end of the rubber hose is first inserted into the four pull pins 5 from below the rotating wheel 3. Then, the cylinder 11 can be started by controlling the foot switch. The piston rod of the cylinder 11 pushes the connecting rod 9. The connecting rod 9 slides on the guide rail 16 on the rear side of the connecting beam 8 through the second slide groove 18. Since the second tooth block 17 on one side of the connecting rod 9 meshes with the first tooth block 12 on the outer side of the rotating wheel 3, it can drive the two rotating wheels 3 to rotate synchronously. Thus, the rotating wheel 3 moves axially within the corresponding protective cover 7, so that the rotating wheel 3 rotates on the multiple pull pins 5 through the multiple guide grooves 19 inside. The arc structure of the guide groove 19 pushes the pull pin 5, thereby causing the slider 15 at one end of the pull pin 5 to move within the corresponding first slide groove 14. Radial movement causes multiple pull pins 5 to move radially in different directions, thereby pulling open one end of the rubber hose through the multiple pull pins 5. Then, the two ends of the stethoscope ear ring or one end of the three-way tube can be inserted into the pulled-open rubber hose. Subsequently, the piston rod of the cylinder 11 is reset by controlling the foot switch, which causes the connecting rod 9 to drive the two rotating wheels 3 to rotate in opposite directions. This causes the rotating wheels 3 to push the multiple pull pins 5 to reset and move through multiple guide grooves 19, thereby placing the multiple pull pins 5 between the rubber hose and the stethoscope ear ring or three-way tube. Then, the stethoscope ear ring or three-way tube is pressed down, causing one end of the pull pin 5 to disengage from the stethoscope ear ring and the rubber hose, allowing the assembled stethoscope ear ring to be moved and removed from the tube slot 13.
[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A stethoscope assembly platform, characterized by: The device includes a workbench (1), on which a tube expander (2) is provided. The tube expander (2) includes two rotating wheels (3). Multiple cantilever arms (4) are provided on the rotating wheels (3). The cantilever arms (4) and the rotating wheels (3) are movably connected by a pull pin (5). A first leg (6) is fixedly installed at one end of the cantilever arm (4). The bottom of the first leg (6) is fixedly installed on the workbench (1). Protective covers (7) are fixedly installed on the multiple cantilever arms (4). A connecting beam (8) is fixedly installed between two of the protective covers (7). A connecting rod (9) is movably installed on the rear side of the connecting beam (8). A second leg (10) is also fixedly installed on the workbench (1) located on one side of one of the first legs (6). A cylinder (11) is fixedly installed on one side of the second leg (10). The cylinder (11) is connected to an external air pump through an air pipe.
2. A stethoscope assembly platform according to claim 1, wherein: The rotating wheel (3) has a tube slot (13) and multiple guide slots (19) inside it. The guide slots (19) have an arc-shaped cross-section.
3. The stethoscope assembly platform of claim 1, wherein: Multiple first tooth blocks (12) are fixedly installed on the outer side of the rotating wheel (3).
4. The stethoscope assembly platform of claim 2, wherein: The cantilever (4) has a first groove (14) inside. One end of the pull pin (5) is fixedly installed with a slider (15). The slider (15) is slidably connected in the first groove (14). One end of the pull pin (5) near the slider (15) is also inserted in the corresponding guide groove (19).
5. The stethoscope assembly platform of claim 2, wherein: The protective cover (7) has a through groove with the same transverse cross section as the tube slot (13).
6. The stethoscope assembly platform of claim 3, wherein: Two guide rails (16) are fixedly installed on the rear side of the connecting beam (8), and the longitudinal section of the guide rails (16) is T-shaped.
7. A stethoscope assembly platform according to claim 6, wherein: The connecting rod (9) has multiple second tooth blocks (17) fixedly installed on one side of the rotating wheel (3). Two second sliding grooves (18) are opened in the connecting rod (9). The connecting rod (9) is slidably connected to two guide rails (16) through the second sliding grooves (18). The multiple second tooth blocks (17) are meshed with the corresponding first tooth blocks (12). One end of the connecting rod (9) is also fixedly connected to one end of the piston rod of the cylinder (11).