Medical trocar with limiting structure

Abstract

The utility model relates to the technical field of medical trocar, in particular to a medical trocar with a limit structure, which comprises a guide seat tube, the left end of the guide seat tube is fixedly connected with a puncture sleeve, the outside of the guide seat tube is fixedly connected with reinforcing strips, the reinforcing strips are distributed at equal intervals, the right end of the guide seat tube is fixedly connected with a reinforcing ring, and the left end of the guide seat tube is fixedly connected with the puncture sleeve. A base plate is fixedly connected to the right side of the guide seat pipe, the base plate communicates with the interior of the guide seat pipe, a steel needle sleeve is connected to the right side of the base plate in a pluggable mode, and a limiting assembly is installed in the steel needle sleeve and used for separating the steel needle sleeve from the guide seat pipe. The limiting assembly comprises a fixing ring, a rotating sleeve, a rotating column, a disc, a cross block, a connecting column and a puncture needle, compared with an existing medical trocar with a limiting structure, through the design of the cross block and the connecting column, the puncture needle can be rapidly retracted into the steel needle sleeve, and the overall practicability is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical trocars, in particular to a medical trocar with a limiting structure. Background Art

[0002] In clinical practice, medical trocars are widely used medical devices. Taking a commonly used disposable intravenous infusion needle as an example, it mainly consists of a protective cap, a steel needle, a needle seat, needle wings, and a connecting tube.

[0003] When in use, medical staff first remove the protective cap covering the steel needle, and then use the steel needle to puncture the vein. After seeing blood return and confirming that the puncture is successful, they perform infusion. This operation is convenient and quick, but the steel needle remains in the blood vessel throughout the infusion process. However, since the needle tip of the steel needle is very sharp, the patient stretches his limbs during the infusion, and the chance of the blood vessel being punctured by the steel needle is very high, especially for children and mentally ill patients. In addition, after the infusion is completed, the medical staff will pull the steel needle out of the human body's vein, and the steel needle stained with the patient's blood will be exposed to the outside, which can easily cause accidental injury and infection to medical staff and patients.

[0004] Therefore, it is particularly important to improve the existing medical trocar with a limiting structure, design a new medical trocar with a limiting structure to solve the above technical defects, and improve the practicality of the overall medical trocar with a limiting structure. Utility Model Content

[0005] The purpose of the present utility model is to provide a medical trocar with a limiting structure to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A medical trocar with a limiting structure comprises a guide tube, the left end of the guide tube is fixedly connected to a puncture sleeve, the outside of the guide tube is fixedly connected to a reinforcement strip, the reinforcement strips are distributed at equal intervals, the right end of the guide tube is fixedly connected to a reinforcement ring, the right side of the guide tube is fixedly connected to a pad, the pad and the interior of the guide tube are interconnected, the right side of the pad is plugged and connected to a steel needle sleeve, and a limiting component is installed inside the steel needle sleeve

[0008] The limiting assembly is used to separate the steel needle sleeve from the guide seat tube.

[0009] As a preferred solution of the present utility model, the limiting assembly includes a fixed ring, a rotating sleeve, a rotating column, a disc, a cross block, a connecting column and a puncture needle. The fixed ring is fixedly connected to the right end of the steel needle sleeve, the rotating sleeve is rotatably connected to the right end of the fixed ring, the rotating column is fixedly connected to the middle of the inside of the rotating sleeve, the disc is fixedly connected to the end of the rotating column away from the rotating sleeve, the cross block is fixedly connected to the outside of the disc, the connecting column is slidably connected to the inside of the steel needle sleeve, and the puncture needle is fixedly connected to the outside of the connecting column.

[0010] As a preferred solution of the present invention, the outside of the rotating sleeve is provided with anti-slip grooves, the end of the connecting column close to the cross block is fixedly connected with an arc-shaped piece, and the inside of the connecting column is provided with grooves and top blocks at positions corresponding to the cross block.

[0011] As a preferred solution of the present invention, an annular groove is provided inside the steel needle sleeve, and the disc is slidably connected to the steel needle sleeve through the annular groove.

[0012] As a preferred solution of the present invention, the left end of the interior of the steel needle sleeve is fixedly connected to a limit plate, the interior of the limit plate is slidably connected to a moving rod, an extension rod is fixedly connected between the moving rod and the connecting column, the outer sleeve of the extension rod is provided with a first spring, and the end of the first spring away from the connecting column is slidably connected to a moving ring.

[0013] As a preferred solution of the present invention, the puncture needle is slidably connected to the outside of the puncture sleeve, a silicone sleeve is fixedly connected to the inside of the guide tube at a position corresponding to the puncture sleeve, and the puncture needle is fixedly connected to the connecting column through a movable rod.

[0014] As a preferred solution of the present invention, the left end of the steel needle sleeve is slidably connected to a cover sleeve, the interior of the cover sleeve is slidably connected to a slider, and the exterior of the slider is fixedly connected to a second spring.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] In the utility model, the rotating sleeve is rotated clockwise to change the shape of the cross block, so that the cross block is completely embedded in the interior of the connecting column, so that the connecting column drives the puncture needle to slide into the interior of the steel needle sleeve, and the second spring is expanded and contracted to store energy, so that the slider is reset to its original position, covering the left end of the puncture needle, reducing the risk of contact with the finger. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the steel needle sleeve of the utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the steel needle sleeve of the utility model;

[0020] Figure 4 This is a partial structural diagram of the limit assembly of the utility model.

[0021] In the figure: 1. Guide seat tube; 2. Puncture sleeve; 3. Reinforcement strip; 4. Reinforcement ring; 5. Pad; 6. Steel needle sleeve; 7. Limiting assembly; 701. Fixed ring; 702. Rotating sleeve; 703. Rotating column; 704. Disc; 705. Cross block; 706. Connecting column; 707. Puncture needle; 708. Arc-shaped piece; 709. Groove; 710. Top block; 711. Annular groove; 712. First spring; 8. Limiting plate; 9. Moving rod; 10. Cover sleeve; 11. Second spring. DETAILED DESCRIPTION

[0022] The following will combine the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] Example:

[0024] See also Figures 1-4 , the utility model provides a technical solution:

[0025] A medical trocar with a limiting structure comprises a guide tube 1, a puncture sleeve 2 being fixedly connected to the left end of the guide tube 1, reinforcement strips 3 being fixedly connected to the outside of the guide tube 1, the reinforcement strips 3 being distributed at equal intervals, a reinforcement ring 4 being fixedly connected to the right end of the guide tube 1, a backing plate 5 being fixedly connected to the right side of the guide tube 1, the backing plate 5 being interconnected with the interior of the guide tube 1, a steel needle sleeve 6 being pluggably connected to the right side of the backing plate 5, and a limiting assembly 7 being installed inside the steel needle sleeve 6;

[0026] The limiting assembly 7 is used to separate the steel needle sleeve 6 from the guide seat tube 1.

[0027] For further information, see Figure 2 、 Figure 3 and Figure 4In this embodiment, the limiting assembly 7 includes a fixed ring 701, a rotating sleeve 702, a rotating column 703, a disk 704, a cross block 705, a connecting column 706 and a puncture needle 707. The fixed ring 701 is fixedly connected to the right end of the steel needle sleeve 6, the rotating sleeve 702 is rotatably connected to the right end of the fixed ring 701, the rotating column 703 is fixedly connected to the middle of the rotating sleeve 702, the disk 704 is fixedly connected to the end of the rotating column 703 away from the rotating sleeve 702, the cross block 705 is fixedly connected to the outside of the disk 704, and the connecting column 706 is slidably connected to the inside of the steel needle sleeve 6. The puncture needle 707 is fixedly connected to the outside of the connecting column 706. When the patient needs infusion or blood collection, the operator holds the guide tube 1 and inserts the puncture needle 707 into the patient's vein, and then the puncture sleeve 2 enters the vein synchronously. By rotating the rotating sleeve 702 clockwise, the rotating column 703 rotates along with the rotating sleeve 702, and the cross block 705 changes its shape, and the cross block 705 moves horizontally and is stuck in the inside of the connecting column 706, so that the puncture needle 707 moves toward the inside of the steel needle sleeve 6, and then the puncture needle 707 is separated from the inside of the vein.

[0028] For further information, see Figure 2 、 Figure 3 and Figure 4 In this embodiment, the outside of the rotating sleeve 702 is provided with anti-slip grooves, and the end of the connecting column 706 close to the cross block 705 is fixedly connected to the arc piece 708. The inside of the connecting column 706 is provided with grooves 709 and top blocks 710 at positions corresponding to the cross block 705. Through the design of the anti-slip grooves, the friction between the rotating sleeve 702 and the palm is greatly enhanced to prevent the hand from slipping off. Through the design of the groove 709, the cross block 705 is completely embedded in the interior of the connecting column 706, so that the connecting column 706 drives the puncture needle 707 to slide into the interior of the steel needle sleeve 6.

[0029] For further information, see Figure 2 、 Figure 3 and Figure 4 In this embodiment, an annular groove 711 is opened inside the steel needle sleeve 6, and the disc 704 is slidingly connected to the steel needle sleeve 6 through the annular groove 711. Through the design of the annular groove 711, when the disc 704 rotates, the annular groove 711 and the disc 704 are limited, so that the disc 704 moves along a predetermined route when it rotates.

[0030] For further information, see Figure 2 、 Figure 3 and Figure 4In this embodiment, the left end of the interior of the steel needle sleeve 6 is fixedly connected to the limit plate 8, and the interior of the limit plate 8 is slidably connected to the moving rod 9. An extension rod is fixedly connected between the moving rod 9 and the connecting column 706. The outer sleeve of the extension rod is provided with a first spring 712, and the end of the first spring 712 away from the connecting column 706 is slidably connected to a moving ring. Through the expansion and contraction energy storage of the first spring 712, the connecting column 706 always moves toward the direction of the cross block 705, and the top block 710 is fitted with the cross block 705 to achieve the extension of the puncture needle 707 to the outside of the steel needle sleeve 6.

[0031] For further information, see Figure 1 、 Figure 2 and Figure 3 In this embodiment, the puncture needle 707 is slidably connected to the outside of the puncture sleeve 2, and a silicone sleeve is fixedly connected to the inside of the guide tube 1 at a position corresponding to the puncture sleeve 2. The puncture needle 707 is fixedly connected to the connecting column 706 through the moving rod 9. Through the design of the silicone sleeve, the puncture needle 707 can extend to the inside of the puncture sleeve 2 and accurately enter its interior.

[0032] For further information, see Figure 2 and Figure 3 In this embodiment, the left end of the steel needle sleeve 6 is slidably connected to a cover sleeve 10, the inside of the cover sleeve 10 is slidably connected to a slider, and the outside of the slider is fixedly connected to a second spring 11. By pulling the cover sleeve 10 out from the outside of the pad 5 and storing energy through the expansion and contraction of the second spring 11, the slider is reset to its original position, covering the left end of the puncture needle 707 to reduce the risk of contact with the finger.

[0033] In this embodiment, the implementation scenario is as follows: when a patient needs infusion or blood collection, the operator holds the guide tube 1 and inserts the puncture needle 707 into the patient's vein, and then realizes that the puncture sleeve 2 enters the vein synchronously, and by rotating the rotating sleeve 702 clockwise, the friction between the rotating sleeve 702 and the palm is greatly enhanced through the design of the anti-slip pattern to prevent the hand from slipping, thereby realizing that the rotating column 703 rotates with the rotating sleeve 702, realizing that the cross block 705 changes shape, and realizing that the cross block 70 5 moves laterally. The first spring 712 is stretched and energized to make the connecting post 706 always move toward the cross block 705. The groove 709 is designed to make the cross block 705 completely embedded in the connecting post 706, so that the connecting post 706 drives the puncture needle 707 to slide into the needle sleeve 6. The cover sleeve 10 is pulled out from the outside of the backing plate 5, and the second spring 11 is stretched and energized to restore the slider to its original position, covering the left end of the puncture needle 707 and reducing the risk of contact with the finger.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A medical trocar with a limiting structure, comprising a guide tube (1), characterized in that: The left end of the guide seat tube (1) is fixedly connected to a puncture sleeve (2), the outside of the guide seat tube (1) is fixedly connected to a reinforcement strip (3), the reinforcement strips (3) are distributed at equal intervals, the right end of the guide seat tube (1) is fixedly connected to a reinforcement ring (4), the right side of the guide seat tube (1) is fixedly connected to a backing plate (5), the backing plate (5) and the interior of the guide seat tube (1) are in a mutually connected state, the right side of the backing plate (5) is pluggably connected to a steel needle sleeve (6), and a limit assembly (7) is installed inside the steel needle sleeve (6); The limiting assembly (7) is used to separate the steel needle sleeve (6) from the guide seat tube (1).

2. The medical trocar with a limiting structure according to claim 1, characterized in that: The limiting assembly (7) includes a fixed ring (701), a rotating sleeve (702), a rotating column (703), a disc (704), a cross block (705), a connecting column (706) and a puncture needle (707), wherein the fixed ring (701) is fixedly connected to the right end of the steel needle sleeve (6), the rotating sleeve (702) is rotatably connected to the right end of the fixed ring (701), the rotating column (703) is fixedly connected to the middle of the rotating sleeve (702), the disc (704) is fixedly connected to one end of the rotating column (703) away from the rotating sleeve (702), the cross block (705) is fixedly connected to the outside of the disc (704), the connecting column (706) is slidably connected to the inside of the steel needle sleeve (6), and the puncture needle (707) is fixedly connected to the outside of the connecting column (706).

3. The medical trocar with a limiting structure according to claim 2, characterized in that: The outside of the rotating sleeve (702) is provided with anti-slip grooves, one end of the connecting column (706) close to the cross block (705) is fixedly connected with an arc-shaped piece (708), and the inside of the connecting column (706) is provided with a groove (709) and a top block (710) at a position corresponding to the cross block (705).

4. The medical trocar with a limiting structure according to claim 2, characterized in that: An annular groove (711) is provided inside the steel needle sleeve (6), and the disc (704) is slidably connected to the steel needle sleeve (6) via the annular groove (711).

5. The medical trocar with a limiting structure according to claim 1, characterized in that: The left end of the interior of the steel needle sleeve (6) is fixedly connected to a limit plate (8), and the interior of the limit plate (8) is slidably connected to a moving rod (9), and an extension rod is fixedly connected between the moving rod (9) and the connecting column (706), and the exterior of the extension rod is provided with a first spring (712), and the end of the first spring (712) away from the connecting column (706) is slidably connected to a moving ring.

6. The medical trocar with a limiting structure according to claim 2, characterized in that: The puncture needle (707) is slidably connected to the outside of the puncture sleeve (2), and a silicone sleeve is fixedly connected to the inside of the guide tube (1) at a position corresponding to the puncture sleeve (2). The puncture needle (707) is fixedly connected to the connecting column (706) via a moving rod (9).

7. The medical trocar with a limiting structure according to claim 1, characterized in that: The left end of the steel needle sleeve (6) is slidably connected to a cover sleeve (10), the interior of the cover sleeve (10) is slidably connected to a slider, and the exterior of the slider is fixedly connected to a second spring (11).

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