Protective sleeve for guiding needle

Abstract

The protective sleeve for the guide needle comprises a shell, a positioning hole used for sleeving the guide needle is formed in the shell, a plurality of positioning pieces are distributed in the positioning hole in the circumferential direction of the positioning hole, and the positioning pieces are provided with positioning faces which abut against blade faces and are arranged in an inclined mode. The positioning pieces are matched with the cutting edges of the guide needles attached to the positioning pieces to position the guide needles, and a containing groove is formed between every two adjacent positioning pieces. The guide needle fixing device has the advantages that the positioning pieces can be attached to the blade faces of the guide needles in a one-to-one correspondence mode so that the guide needles can be fixed in the protective sleeve, and therefore the guide needles can be prevented from being damaged due to collision in the transportation process. And the positioning piece can form a one-to-one correspondence fit relationship with the blade surface of the guide needle, so that the blade surface of the guide needle can be prevented from being embedded into the positioning hole of the protective sleeve to cause damage to the blade surface.

Description

Technical Field

[0001] The utility model relates to a protective sleeve, in particular to a protective sleeve for a guide needle. Background Art

[0002] In surgery, a guide needle is used as an auxiliary tool, and its main function is to provide a path for the accurate placement of a drainage tube. The guide needle is first inserted into the body to create a small channel, and then the drainage tube is accurately guided along this channel to the designated position for drainage of fluid or gas. This method is often used in abdominal surgery, thoracic surgery, or other situations where drainage is required to help remove blood, pus, or other body fluids that may accumulate during or after surgery. The use of a guide needle can improve the accuracy and safety of drainage tube placement, reduce tissue damage, and promote rapid recovery.

[0003] The guide needle generally has one or more blades, and a blade portion is formed between the multiple blades. In the prior art, a protective cover is usually used to protect the guide needle. If there is no protective cover, the blade portion of the guide needle is easy to scratch the surgical personnel after use, thereby causing risks such as cross infection. Figure 1 A protective sleeve commonly used in the prior art for protecting a guide needle is shown, wherein a plum blossom-shaped positioning hole is provided at the center of the protective sleeve, and the inner surface of the positioning hole fits on the outer surface of the guide needle to form a positioning for the guide needle.

[0004] However, the above scheme has the following shortcomings: when the plum blossom-shaped positioning hole is attached to the guide needle, the blade of the guide needle is easy to scratch or penetrate the protective cover during the assembly process or transportation process, resulting in damage to the protective cover. After the protective cover is damaged, the guide needle is easy to rotate in the positioning hole due to external forces such as collision, thereby causing damage to the tip of the guide needle. In addition, since the existing protective cover cannot form a good positioning for the guide needle when in use, the existing protective cover is easy to fall off during clinical use. At this time, if the surgical staff is not careful, they are easy to be stabbed, which is easy to cause the risk of cross infection. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a protective sleeve for a guide needle which can better protect the guide needle.

[0006] To achieve the above-mentioned purpose, the technical solution of the utility model is as follows: a protective cover for a guide needle, comprising a shell, the shell being provided with a positioning hole for sleeve-mounting the guide needle, a plurality of positioning members being arranged in the positioning hole and distributed circumferentially along the positioning hole, the positioning member being provided with a positioning surface which abuts against the blade surface and is arranged at an angle, a fitting relationship formed by the plurality of positioning members and the blade edge of the guide needle which fits therewith cooperates to form the positioning of the guide needle, and a placement groove is formed between adjacent positioning members.

[0007] The beneficial effects of the utility model are as follows: the positioning piece forms a fitting relationship with the blade surface of the guide needle through the positioning surface, and the fitting relationship formed by several positioning pieces and the blade surface of the guide needle can cooperate to fix the guide needle in the protective sleeve, that is, there are at least two positioning pieces fitted on the blade surface of the guide needle to prevent the damage of the guide needle caused by collision during transportation. The positioning surface arranged at an angle can be gradually clamped on the blade surface as the guide needle gradually extends into the positioning hole to prevent the guide needle from rotating in the positioning hole, thereby further preventing the guide needle from being damaged in the positioning hole. The placement groove between adjacent positioning pieces can be used to place the cutting edge formed between adjacent blade surfaces to isolate the cutting edge from the inner surface of the positioning hole, thereby preventing the cutting edge from penetrating through the protective sleeve and exposing the guide needle outside the protective sleeve.

[0008] Furthermore, the positioning surface is an arc-shaped concave surface, and the lowest point of the arc-shaped concave surface is arranged corresponding to the center of the blade surface of the guide needle.

[0009] The symmetrical arcs on both sides of the arc-shaped concave surface can play a guiding role during the insertion of the guide needle blade, that is, if the blade surface deviates in the process of forming a fit with the positioning piece, the arc-shaped concave surface can be corrected to make the blade surface better fit on the positioning surface; and because the lowest point of the arc-shaped concave surface is located on the center line of the arc-shaped concave surface, when the center of the blade surface coincides with the position of the lowest point after correction, the arc-shaped concave surface can further prevent the blade surface from being inserted into the positioning piece, thereby providing better protection for the blade surface.

[0010] Furthermore, the shell is provided with a guide mark on the outside for indicating the assembly direction.

[0011] The following briefly describes one of the feasible methods in the above scheme, in which the number of positioning members corresponding to the number of blade faces is an odd number, and since the position of the positioning member located at the center of the plurality of positioning members in the housing corresponds to the position of the guide mark outside the housing, and the position of the guide mark outside the housing and the position of the positioning member located at the center in the housing are in the same plane. Therefore, during assembly, the initial positioning of the guide needle can be completed by the guide mark outside the housing, thereby improving assembly efficiency.

[0012] Furthermore, the guide mark is a protrusion that is integrally formed and protrudes from the outside of the shell.

[0013] The protruding guide mark can be used to determine the assembly position in conjunction with the production line during automated assembly to prevent misassembly. In addition, the one-piece molding method makes it easier to process the protective cover.

[0014] Furthermore, a fixing piece is provided on the other end of the housing corresponding to the positioning piece, and the fixing piece is extended toward the center of the positioning hole. The fixing piece cooperates with the positioning piece to fix the guide needle in the protective sleeve.

[0015] By setting a fixing part, the guide needle can be fixed on the basis of the positioning of the guide needle by the positioning part, so as to prevent the guide needle from being offset in the positioning hole due to collision, so as to further prevent the guide needle from being damaged during transportation. At the same time, because the fixing part is set, the fixing measures set to prevent the guide needle from being offset during transportation can also be appropriately lowered, thereby reducing transportation costs. When the above scheme cooperates with the guide needle to fix the guide needle, the fixing part is deformed first, and after the head part of the guide needle completely enters the positioning hole, the fixing part rebounds and is clamped at the tail end of the guide needle head, thereby preventing the head part of the guide needle from being offset in the positioning hole.

[0016] Furthermore, an observation hole is provided at one end of the shell corresponding to the positioning piece, and the aperture of the observation hole is smaller than the aperture of the positioning hole.

[0017] The setting of the observation hole can facilitate the quality inspection of the subsequent process after the assembly between the protective cover and the guide needle is completed, that is, through the observation hole, it can be seen whether the fit between the guide needle and the positioning piece is in place. And because the aperture of the observation hole is smaller than the aperture of the positioning hole, the shell located on one side of the observation hole can prevent the risk of personal injury or damage to the tip at the top of the guide needle from being exposed outside the positioning hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the prior art.

[0019] Figure 2 This is a disassembly diagram of an embodiment of the utility model;

[0020] Figure 3 This is an axonometric view of a guide needle according to an embodiment of the utility model;

[0021] Figure 4 This is an axonometric view of the protective cover of the utility model embodiment;

[0022] Figure 5 This is a partial enlarged view of the fixing member of the embodiment of the utility model;

[0023] Figure 6 This is an internal view of the positioning hole of an embodiment of the utility model. DETAILED DESCRIPTION

[0024] The utility model embodiment is a protective sleeve for a guide needle. Figure 1-6As shown: it includes a guide needle 2 and a protective sleeve 1 for protecting the guide needle 2. The protective sleeve 1 can be made of PVC material. If the guide needle 2 is displaced in the protective sleeve 1, the soft plastic material of the protective sleeve 1 can prevent the guide needle 2 from being damaged.

[0025] In this embodiment, only the head of the guide needle 2 is shown, and the rest of the parts are not used in this embodiment and are therefore not shown here. The head of the guide needle 2 is provided with three adjacent blade surfaces 21 that fit each other, and the adjacent blade surfaces 21 are connected to form a blade portion 23. The tail end of the head of the guide needle 2 is provided with a fixing surface 22 whose cross-sectional thickness gradually decreases in the direction away from the head of the guide needle 2.

[0026] The protective cover 1 includes a shell 11, a positioning hole 12 is provided inside the shell 11, and a positioning member 13 is provided inside the positioning hole 12, which is located at one end of the shell 11 and corresponding to the position of the blade surface 21. An observation hole 161 with a smaller aperture than the positioning hole 12 is provided at one end of the shell 11 corresponding to the positioning member 13, and a placement groove 121 for isolating the blade 23 from the inner surface of the positioning hole 12 is formed between adjacent positioning members 13; a plurality of fixing members 15 are provided at the other end of the shell 11 corresponding to the positioning member 13, each fixing member 15 is extended toward the center of the positioning hole 12 and each fixing member is elastic, and abutting surfaces 151 with a certain width are formed on the fixing members 15 toward the surface of the guide needle 2, and the surface of the guide needle 2 can be prevented from being scratched during the process of the guide needle 2 entering the positioning hole 12 by the abutting surfaces 151. A guide mark 14 is also provided outside the shell 11, and the position of the guide mark 14 outside the shell 11 corresponds to the position of the positioning member 13 located at the center of the three positioning members 13 inside the positioning hole 12. Each positioning member 13 is provided with a positioning surface 131 that fits with the blade surface 21. The positioning surface 131 is an arc-shaped concave surface. The lowest point of the positioning surface 131 is set corresponding to the center of the blade surface 21 of the guide needle 2, and the two sides of the positioning surface 131 are symmetrically arranged along the straight line formed by the lowest point of the arc-shaped concave surface. The cross-sectional thickness of the positioning surface 131 gradually increases in the direction of insertion of the guide needle 2.

[0027] The following is a brief description of the manual assembly process of this embodiment: the blade surface 21 located at the center of the three blade surfaces 21 is turned away from the guide mark 14 outside the shell 11, and the guide needle 2 is inserted into the positioning hole 12 along this direction. As the blade surface 21 of the guide needle 2 moves to the corresponding position of the positioning member 13, the arc-shaped positioning surface 131 can play a guiding role to correct the slight angle deflection that occurs when the guide needle 2 enters the positioning hole 12 and reaches the positioning member 13, thereby preventing the blade surface 21 from being inserted into the positioning member 12 due to position displacement. After the angle correction is completed, as the guide needle 2 continues to move toward the bottom of the positioning hole 12, the positioning surface 131 with a gradually increasing thickness fits on the blade surface 21 of the guide needle 2 to form a positioning for the guide needle 2. In the above process, the fixing part 15 will be deformed and abut against the surface of the guide needle 2 through the abutment surface 151. When the guide needle 2 cooperates with the positioning part 13 to form a positioning, the fixing part 15 rebounds and is clamped on the inclined fixing surface 22 to complete the overall positioning of the head of the guide needle 2 and prevent it from being displaced in the positioning hole 12 when a collision occurs.

[0028] The above embodiment is only one of the preferred specific embodiments of the present invention. Common changes and substitutions made by those skilled in the art within the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A protective sleeve for a guide needle, comprising a housing, wherein the housing is provided with a positioning hole for sleeve-mounting the guide needle, and wherein: A plurality of positioning members are arranged in the positioning hole and distributed along the circumference of the positioning hole. The positioning member is provided with a positioning surface which abuts against the blade surface and is arranged at an angle. The fitting relationship formed by the plurality of positioning members and the blade edge of the guide needle which they fit together cooperates to form the positioning of the guide needle, and a placement groove is formed between adjacent positioning members.

2. The protective cover for the guide needle according to claim 1, characterized in that: The positioning surface is an arc-shaped concave surface, and the lowest point of the arc-shaped concave surface is arranged corresponding to the center of the blade surface of the guide needle.

3. The protective cover for the guide needle according to claim 2, characterized in that: The shell body is provided with a guide mark for indicating the assembly direction.

4. The protective cover for the guide needle according to claim 3, characterized in that: The guide mark is a protrusion that is integrally formed and protrudes from the outside of the shell.

5. The protective cover for a guide needle according to claim 1, characterized in that: A fixing piece is provided on the other end of the housing corresponding to the positioning piece. The fixing piece is extended toward the center of the positioning hole. The fixing piece cooperates with the positioning piece to fix the guide needle in the protective sleeve.

6. The protective cover for a guide needle according to claim 1, characterized in that: An observation hole is provided at one end of the shell corresponding to the positioning piece, and the aperture of the observation hole is smaller than the aperture of the positioning hole.

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