Medical plastic-coated spring tube with high pressure resistance

Abstract

The utility model belongs to the field of bourdon tubes, and provides a medical plastic-coated bourdon tube with strong anti-pressure ability, which comprises two groups of joints which are arranged to be of hollow structures, opposite sides of the two groups of joints are connected with sleeves, a bourdon tube is arranged on the inner side between the two sleeves, and the bourdon tube is connected with the joints. A plastic coating layer used for protecting the bourdon tube is arranged on the outer side between the two sleeves, an annular groove is formed in the inner side of the connector, and four sets of notches communicated with the annular groove are circumferentially formed in the end face, close to the sleeves, of the connector at equal intervals. The connectors are arranged at the two ends of the spring tube, the pressing plates used for pressing the plastic coating layer in the circumferential direction are arranged on the connectors through the driving mechanism, the gear ring, the gear and the tooth row are matched, the positioning plate can be driven to drive the pressing plates to move, so that the plastic coating layer is connected in a reinforced mode, meanwhile, the gear ring can be positioned through the positioning piece, and the positioning effect is good. Therefore, the stability of the reinforcing structure is ensured.

Description

Technical Field

[0001] The utility model belongs to the field of spring tubes, in particular to a medical plastic-coated spring tube with strong pressure resistance. Background Art

[0002] Medical plastic-coated spring tubes are made of high-strength, corrosion-resistant materials, with a layer of plastic or other non-metallic material covering the outside. This structure allows them to have the elastic support and pressure resistance of spring tubes, while also possessing the wear resistance, corrosion resistance, and biocompatibility of the plastic coating.

[0003] Existing medical plastic-coated spring tubes typically use a viscose-based coating, applied to the outer surface of the spring tube. While viscose has a certain degree of adhesion, its performance is often affected by environmental factors such as temperature and humidity. In extreme environments, such as high temperature and high humidity, or low temperature and low humidity, the adhesive strength of the viscose may decrease, resulting in an unstable connection between the plastic coating and the spring tube.

[0004] Therefore, those skilled in the art have proposed a medical plastic-coated spring tube with strong pressure resistance to solve the problems raised in the background art. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a medical plastic-coated spring tube with strong pressure resistance, so as to solve the problem that the plastic-coated spring tube in the prior art adopts a viscose design between the plastic coating layer and the spring tube, resulting in unstable connection in extreme environments.

[0006] A medical plastic-coated spring tube with strong pressure resistance includes two groups of joints, both of which are configured as hollow structures. Sleeves are connected to the opposite sides of the two groups of joints. The spring tube is provided on the inner side between the two sleeves. A plastic-coated layer for protecting the spring tube is provided on the outer side between the two sleeves. An annular groove is provided on the inner side of the joint. Four groups of notches communicating with the annular groove are provided at equal intervals on the end face of the joint close to the sleeve. Connecting rods are slidably connected in the four groups of notches. A pressure plate is connected to one end of the connecting rod. A driving structure for driving the four groups of pressure plates to move synchronously to reinforce the connection of the plastic-coated layer is provided in the annular groove.

[0007] Preferably, the cross-section of the four groups of connecting rods is set to an L-shaped structure, the horizontal section of which is located inside the annular groove, and the vertical section of which passes through the notch and is connected to the pressure plate.

[0008] Preferably, the cross section of the pressing plate is configured as an arc-shaped structure, which is configured to fit in with the outer wall of the plastic coating layer.

[0009] Preferably, the driving structure includes a gear ring, a gear, a gear row and a positioning member. A gear ring and four sets of gears are rotatably arranged in an annular groove. The end face of the gear ring is provided with four sets of gears for connecting and positioning it. The four sets of gears are arranged in a circular trajectory on the outside of the gear ring, and the four sets of gears are all meshed with the gears. The horizontal sections of the four sets of connecting rods are all provided with gear rows, and the four sets of gears are respectively meshed with the four sets of gear rows.

[0010] Preferably, the gear ring is meshedly connected to the upper half of the gear, and the gear row is meshedly connected to the lower half of the gear.

[0011] Preferably, the positioning member includes a positioning plate and a fastening screw. The end face of the gear ring is connected to the positioning plate. One end of the positioning plate extends to the outer side of the end face of the joint away from the sleeve. The positioning plate and the joint are respectively provided with a fixing hole and a threaded hole. The rod of the fastening screw passes through the fixing hole and is threadedly connected to the threaded hole.

[0012] Preferably, a guide groove for the positioning plate to move is provided on the joint, and the positioning plate is slidably connected to the guide groove.

[0013] Compared with the prior art, the present invention has the following beneficial effects: the present invention ensures the overall compressive resistance by setting a built-in spring tube, and by setting joints at both ends of the spring tube, a compression plate is set on the joint for circumferentially compressing the plastic coating layer, thereby reinforcing the connection of the plastic coating layer. At the same time, a driving structure is provided, and the cooperation of the gear ring, gear and gear row can drive the positioning plate to drive the pressure plate to move, so that after the plastic coating layer is damaged, the reinforcing force applied to it is contacted, so that the plastic coating layer can be replaced separately. At the same time, a positioning part is provided, and the gear ring can be positioned by the cooperation of the positioning plate and the fastening screw to prevent it from rotating and driving the pressure plate to move, thereby ensuring the stability of the reinforced structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the main structural diagram of the utility model;

[0015] Figure 2 It is a side sectional structural diagram of the utility model;

[0016] Figure 3 This is a structural diagram of the joint of the present utility model;

[0017] Figure 4 This is a side sectional structural diagram of the joint of the present utility model;

[0018] Figure 5 For this utility model Figure 1 A magnified structural diagram of part A;

[0019] Figure 6 This is a split structural diagram of the positioning member of the utility model.

[0020] In the picture:

[0021] 1. Connector; 2. Sleeve; 3. Spring tube; 4. Annular groove; 5. Notch; 6. Connecting rod; 7. Pressure plate; 8. Gear ring; 9. Gear; 10. Gear row; 11. Positioning plate; 12. Fastening screw; 13. Fixing hole; 14. Threaded hole; 15. Guide groove; 16. Plastic coating. DETAILED DESCRIPTION

[0022] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] As attached Figure 1 To the attached Figure 6 As shown:

[0024] The utility model provides a medical plastic-coated spring tube with strong pressure resistance, comprising a joint 1, which is provided with two groups and is both configured as a hollow structure. A sleeve 2 is connected to the opposite side of the two groups of joints 1, a spring tube 3 is provided on the inner side between the two sleeves 2, and a plastic-coated layer 16 for protecting the spring tube 3 is provided on the outer side between the two sleeves 2. An annular groove 4 is provided on the inner side of the joint 1, and four groups of notches 5 communicating with the annular groove 4 are equidistantly provided on the end face of the joint 1 close to the sleeve 2. Connecting rods 6 are slidably connected in the four groups of notches 5, one end of the connecting rod 6 is connected to a pressing plate 7, and a driving structure for driving the four groups of pressing plates 7 to synchronously move to reinforce the connection of the plastic-coated layer 16 is provided in the annular groove 4.

[0025] refer to Figure 4 The cross-section of the four groups of connecting rods 6 is set to an L-shaped structure, the horizontal section of which is located inside the annular groove 4, and the vertical section passes through the notch 5 and is connected to the pressure plate 7.

[0026] Among them, four groups of notches 5 are arranged radially outward from the middle of the joint 1. When the connecting rod 6 moves in the notch 5, it can drive the pressure plate 7 to move synchronously, thereby applying force to the plastic coating 16 to press it tightly against the outside of the sleeve 2.

[0027] refer to Figure 3 The cross section of the pressing plate 7 is set to an arc-shaped structure, which is fitted with the outer wall of the plastic coating layer 16.

[0028] The arc-shaped structure ensures that the pressing plate 7 is in close contact with the outer wall of the plastic coating layer 16 when applying force to the plastic coating layer 16 , thereby increasing the contact area between the two and improving the stability of the connection.

[0029] refer to Figure 4The driving structure includes a gear ring 8, a gear 9, a gear row 10 and a positioning member. A gear ring 8 and four sets of gears 9 are rotatably arranged in the annular groove 4. The end face of the gear ring 8 is provided with four sets of gears 9 for connection and positioning thereof. The four sets of gears 9 are arranged on the outside of the gear ring 8 in a circular trajectory, and the four sets of gears 9 are all meshed with the gears 9. The horizontal sections of the four sets of connecting rods 6 are all provided with gear rows 10, and the four sets of gears 9 are respectively meshed with the four sets of gear rows 10.

[0030] refer to Figure 4 The gear ring 8 is meshed with the upper part of the gear 9, and the gear row 10 is meshed with the lower part of the gear 9.

[0031] Among them, by driving the gear ring 8 to rotate, since the gear ring 8 is synchronously meshed with the four sets of gears 9, when the gear ring 8 rotates, the four sets of gears 9 will rotate synchronously. Since the four sets of gears 9 are respectively meshed with the gear rows 10, under the action of the meshing force, the four sets of connecting rods 6 will be driven to move along the slots 5. When the four sets of connecting rods 6 move, the pressure plate 7 will be driven to move synchronously, thereby causing the pressure plate 7 to tightly press the plastic coating 16 onto the outside of the sleeve 2.

[0032] refer to Figure 5 drink Figure 6 The positioning member includes a positioning plate 11 and a fastening screw 12. The end face of the gear ring 8 is connected to the positioning plate 11. One end of the positioning plate 11 extends to the outer side of the end face of the joint 1 away from the sleeve 2. A fixing hole 13 and a threaded hole 14 are respectively opened on the positioning plate 11 and the joint 1. The rod of the fastening screw 12 passes through the fixing hole 13 and is threadedly connected to the threaded hole 14.

[0033] The gear ring 8 is positioned by passing the rod of the fastening screw 12 through the fixing hole 13 , through the positioning plate 11 , and screwing it into the threaded hole 14 .

[0034] refer to Figure 5 The joint 1 is provided with a guide groove 15 for the positioning plate 11 to move, and the positioning plate 11 is slidably connected to the guide groove 15.

[0035] The guide groove 15 is provided so that the positioning plate 11 can move along the guide groove 15 when it is moved, thereby limiting its movement trajectory.

[0036] When the gear ring 8 rotates, the four gears 9 will be driven by the meshing force to rotate synchronously. The four gears 9 will be meshed with the tooth rows 10 respectively, which will drive the four connecting rods 6 to move along the slots 5. When the four connecting rods 6 move, they will drive the pressure plate 7 to move synchronously, so that the pressure plate 7 can press the plastic coating 16 tightly against the outer side of the sleeve 2. Then, the rod part of the fastening screw 12 is passed through the fixing hole 13 through the positioning plate 11 and the threaded hole 14 to realize the positioning of the gear ring 8 and the reinforced connection of the plastic coating 16. The overall connection between the plastic coating 16 and the spring tube 3 can be ensured to be tighter, reducing the safety hazards caused by loosening or falling off, and when the plastic coating 16 is damaged, it is convenient to replace it separately, and the operability is good.

[0037] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A medical plastic-coated spring tube with strong compressive resistance, characterized in that: The invention comprises a joint (1), which is provided with two groups, both of which are provided with a hollow structure, wherein the two groups of joints (1) are connected to opposite sides with sleeves (2), a spring tube (3) is provided on the inner side between the two sleeves (2), and a plastic coating layer (16) for protecting the spring tube (3) is provided on the outer side between the two sleeves (2), an annular groove (4) is provided on the inner side of the joint (1), and four groups of notches (5) communicating with the annular groove (4) are provided at equal intervals on the end face of the joint (1) close to the sleeve (2), and the four groups of notches (5) are all slidably connected with connecting rods (6), one end of the connecting rod (6) is connected with a pressing plate (7), and a driving structure for driving the four groups of pressing plates (7) to synchronously move to reinforce the connection with the plastic coating layer (16) is provided in the annular groove (4).

2. A medical plastic-coated spring tube with strong compressive resistance as claimed in claim 1, characterized in that: The cross-sections of the four groups of connecting rods (6) are arranged in an L-shaped structure, with the horizontal sections located inside the annular groove (4) and the vertical sections passing through the notch (5) and connected to the pressing plate (7).

3. The medical plastic-coated spring tube with high pressure resistance according to claim 1, characterized in that: The cross section of the pressing plate (7) is arranged to be an arc-shaped structure, and is arranged to fit the outer surface wall of the plastic coating layer (16).

4. The medical plastic-coated spring tube with high compressive resistance according to claim 1, characterized in that: The driving structure comprises a gear ring (8), a gear (9), a gear row (10) and a positioning member. The gear ring (8) and four groups of gears (9) are rotatably arranged in an annular groove (4). The end surface of the gear ring (8) is provided with four groups of gears (9) for connection and positioning thereof. The four groups of gears (9) are arranged on the outside of the gear ring (8) in a circular trajectory, and the four groups of gears (9) are all meshed and connected with the gears (9). The horizontal sections of the four groups of connecting rods (6) are all provided with gear rows (10), and the four groups of gears (9) are respectively meshed and arranged with the four groups of gear rows (10).

5. A medical plastic-coated spring tube with strong compressive resistance as claimed in claim 4, characterized in that: The gear ring (8) is meshedly connected with the upper half of the gear (9), and the gear row (10) is meshedly connected with the lower half of the gear (9).

6. A medical plastic-coated spring tube with high pressure resistance as claimed in claim 4, characterized in that: The positioning member includes a positioning plate (11) and a fastening screw (12). The end face of the gear ring (8) is connected to the positioning plate (11). One end of the positioning plate (11) extends to the outer side of the end face of the connector (1) away from the sleeve (2). The positioning plate (11) and the connector (1) are respectively provided with a fixing hole (13) and a threaded hole (14). The rod of the fastening screw (12) passes through the fixing hole (13) and is threadedly connected to the threaded hole (14).

7. A medical plastic-coated spring tube with high pressure resistance as claimed in claim 6, characterized in that: A guide groove (15) for the positioning plate (11) to move is provided on the joint (1), and the positioning plate (11) is slidably connected to the guide groove (15).

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