Anti-needling protection device and anti-needling dialysis remaining needle

Abstract

The utility model provides an anti-needling protection device which comprises a protection base, an elastic steel sheet and a needle body, an installation cavity with one end open is formed in the protection base, and a first needle hole and a second needle hole are formed in the upper end and the lower end of the installation cavity; the elastic steel sheet is arranged in the mounting cavity, a limiting hole is formed in the upper end of the elastic steel sheet, and a first limiting protrusion is arranged on the side wall of the front end of the needle body; a protection part is formed at the lower end of the elastic steel sheet and has a first position and a second position; when the needle head of the needle body penetrates through the second needle hole, the protection part is located at the first position, presses the side wall of the needle body and has the trend of moving towards the direction of the needle body. And when the needle head of the needle body is pulled out of the second needle hole, the protection part loses the support of the needle body and moves to the second position under the action of the elastic force, and the path of inserting the needle head into the second needle hole is blocked. The anti-puncturing protection device is simple and compact in structure, low in manufacturing cost, convenient to assemble, good in anti-puncturing effect and high in use safety.

Description

TECHNICAL FIELD

[0001] The utility model relates to a dialysis indwelling needle, in particular to a needle stick protection device and dialysis indwelling needle. BACKGROUND

[0002] Hemodialysis is the main treatment method for maintaining life of end-stage renal patients, and the patients need to perform hemodialysis two to three times a week, when performing hemodialysis, two thick steel needles are inserted into the arteriovenous of the patient to establish a hemodialysis channel, and then connected with a hemodialysis instrument to realize hemodialysis; in order to reduce the pain of the patient, the existing technology adopts the method of indwelling needle, and the needle tube is reserved on the patient to reduce the needle puncture frequency of the patient; however, after the indwelling needle is punctured, the inner needle needs to be taken out from the indwelling needle, and in the process of taking out the inner needle, the medical staff may be accidentally pricked by the inner needle and even infected, in order to protect the medical staff, some safety indwelling needles are disclosed in the prior art, however, the existing safety indwelling needle has a complex structure, high manufacturing cost, and thus increases the use cost of the product. SUMMARY

[0003] Technical problem to be solved

[0004] The technical problem to be solved by the utility model is to provide a needle stick protection device and dialysis indwelling needle with compact structure, convenient installation, low manufacturing cost and good use effect.

[0005] Technical scheme for solving the problem

[0006] The utility model provides a needle stick protection device, including protection seat 2, elastic steel sheet 3 and needle body 11, the protection seat 2 is shaped with the installation cavity 20 of one end open, the upper and lower ends of installation cavity 20 are set up respectively with the first needle hole 20a and the second needle hole 20b that can contain the needle body 11 from top to bottom passes through, the elastic steel sheet 3 is set up in the installation cavity 20, the upper end of elastic steel sheet 3 is equipped with the limiting hole 310 that can contain the needle body 11 passes through, and the front end side wall of needle body 11 is equipped with the first limiting protrusion 111 for preventing the needle body 11 from pulling out upwards from the limiting hole 310, the lower end of elastic steel sheet 3 is bent to the side of needle body 11 and forms a protection part, and the protection part has a first position and a second position.

[0007] When the needle head of needle body 11 passes through the lower needle hole 20b, the protection part is located at the first position, and the side wall of needle body 11 is pressed and has a movement trend of approaching the needle body direction.

[0008] When the needle of the needle body 11 is pulled out of the second needle hole 20b, the protection part loses the support of the needle body 11 and moves to the second position under the action of the elastic force and blocks the path of the needle inserted into the second needle hole 20b.

[0009] Further, the protection part is V-shaped or U-shaped.

[0010] Further, the elastic steel sheet 3 comprises a mounting part 31 for being fixed into a mounting cavity, a limiting hole 310 is arranged on the mounting part 31, an end of the mounting part 31 is bent downward and forms a connecting part 32, an end of the connecting part 32 forms a first protection part 33, an end of the first protection part 33 is bent upward and forms a second protection part 34, and a V-shaped or U-shaped protection part is formed between the first protection part 33 and the second protection part 34.

[0011] Further, the width of the connecting part 32 is smaller than the width of the mounting part 31 and the protection part.

[0012] Further, the connecting part 32 is arc-shaped or L-shaped.

[0013] Further, the mounting cavity is provided with a mounting clamping groove capable of allowing the mounting part 31 to be inserted radially and realizing the fixation of the elastic steel sheet 3.

[0014] Further, a safety groove 201 is arranged on the side wall of the mounting cavity 20 and faces the protection part, and when the protection part is in the second position, an end of the protection part is located in the safety groove 201 and can avoid contacting the needle of the needle body.

[0015] Further, the protection device further comprises a catheter seat 4, a mounting insertion hole is arranged on the top of the catheter seat 4, a limiting clamping groove is arranged on the side wall of the mounting insertion hole, a first columnar protrusion 23 capable of being inserted into the mounting insertion hole is arranged on the lower end of the protection seat 2, a second limiting protrusion 231 with an arc-shaped cross section is arranged on the side wall of the first columnar protrusion 23, and the second limiting protrusion 231 can be clamped in the limiting clamping groove and forms damping.

[0016] Further, a second columnar protrusion 22 is arranged on the top of the protection seat 2, and the first needle hole 20a penetrates the second columnar protrusion.

[0017] Further, the first limiting protrusion 111 is formed by extrusion.

[0018] Meanwhile, the application also provides a needle-stick-proof dialysis indwelling needle using the needle-stick-proof protection device.

[0019] Beneficial effects

[0020] The utility model discloses a protection device of preventing needle prick, adopt the steel sheet structure to stop the needle head, compact structure, and simple and low cost manufacturing process, and the effect of preventing the prick is good, adopt V-shaped protection department, form the needle head protection area, and the effect of preventing the prick is good, the structure optimization is carried out to the elastic steel sheet, and simple processing, convenient assembly and good use effect, the connecting portion width of elastic steel sheet is less than the width of protection department, increases the protection area space, simultaneously, can reduce the integral elasticity, reduces the pressure of needle body and its resistance when taking out, and the operation hand feeling is good, sets up the safety groove, when protection department is located at the second position, the end of second protection sheet is located in the safety groove, avoids the contact with the needle head of needle body, and further prevents the needle head to pry open protection department, increases the security of preventing the prick, and reliable and stable use, through the arc limit protruding and catheter seat connection, convenient installation, and can realize quick separation, and the use effect is good, the utility model discloses a protection device of preventing needle prick, simple and compact structure, low manufacturing cost, convenient assembly, good effect of preventing the prick, and high use safety. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the structure schematic drawing of the utility model protection device of preventing needle prick;

[0022] Figure 2 It is the section view of the utility model protection device of preventing needle prick;

[0023] Figure 3 It is the first position schematic drawing of protection department of the utility model protection device of preventing needle prick;

[0024] Figure 4 It is the explosion structure schematic drawing of the utility model protection device of preventing needle prick;

[0025] Figure 5 It is another state section view of the utility model protection device of preventing needle prick;

[0026] Figure 6 It is the second position schematic drawing of protection department of the utility model protection device of preventing needle prick;

[0027] Figure 7 It is the structure schematic drawing of elastic steel sheet of the utility model protection device of preventing needle prick;

[0028] Figure 8 It is the structure schematic drawing of the utility model needle of preventing needle prick;

[0029] Figure 9 It is the section view of the utility model needle of preventing needle prick;

[0030] Figure 10 It is Figure 9 The enlarged view of A part in middle. DETAILED DESCRIPTION

[0031] The utility model discloses an embodiment, which specifically is shown as follows.

[0032] Referring to Figures 1-7 The utility model provides a kind of anti-needle protection device, including protection seat 2, elastic steel sheet 3 and needle body 11, protection seat 2 is overall columnar structure, installation cavity 20 is formed in protection seat 2, the side of this installation cavity 20 is open, the installation of elastic steel sheet 3 is facilitated, first needle hole 20a and second needle hole 20b are respectively set in the upper and lower ends of installation cavity 20, first needle hole 20a and second needle hole 20b are coaxially arranged, it can accommodate needle body 11 from top to bottom and pass, i.e. the protection seat 2 is installed on needle body 11;Elastic steel sheet 3 is arranged in installation cavity 20, and its upper end is fixed end, and lower end is movable end, specifically, the upper end of elastic steel sheet 3 is provided with limit hole 310, the limit hole 310 can accommodate needle body 11 and pass, realize the connection of needle body 11 and elastic steel sheet 3, first limiting protrusion 111 is arranged on the front end of needle body 11, i.e. on the side wall of needle body close to needle head, the width of the first limiting protrusion 111 is greater than the aperture of limit hole 310, and it is used to prevent needle body 11 from being pulled out upward from limit hole 310, i.e. when needle body is located in upper limit position, the needle head is always located in installation cavity 20, in the embodiment, the first limiting protrusion 111 is formed by extrusion;

[0033] When the needle head of needle body 11 passes through lower needle hole 20b, protection part is located at first position, at this time, the end of protection part is in contact with the side wall of needle body 11 and is pressed tightly under the action of elastic force, and it has the movement tendency of approaching needle body, i.e. protection part is located at first position under the support of needle body 11, and it has the tendency of moving to second position;

[0034] When the needle head of needle body 11 is pulled out from second needle hole 20b, protection part loses the support of needle body 11, and moves to second position under the action of elastic force of elastic steel sheet 3 itself, and blocks the path of needle head insertion into second needle hole 20b, at this time, protection part is located directly above second needle hole 20b, can prevent needle head from being inserted into second needle hole, makes needle head be located between installation cavity and protection part, needle body cannot be pulled out upward under the action of first limiting protrusion 111, and cannot be inserted into second needle hole 20b under the action of protection part, realizes the effect of anti-needle protection, and then protection seat is used to cover on needle head, forms protection.

[0035] In order to improve the stability of needle body, avoid that needle body swings excessively in second position and affects safety, in the application, second cylindrical protrusion 22 is arranged on the top of protection seat 2, first needle hole 20a penetrates second cylindrical protrusion 22, which increases the contact distance of first needle hole and needle body in axial direction, improves the stability of needle body, avoids that excessively large swing occurs and causes potential safety hazard.

[0036] In the present application, the protection part is V-shaped or U-shaped, which forms an upward V-shaped or U-shaped protection area 340, so that the needle is located in the protection area 340. Specifically, the elastic steel sheet 3 includes a mounting part 31 which is a rectangular sheet structure and is used for being fixed in the mounting cavity as a fixed connection end of the elastic steel sheet 3 and the protection seat 2. A limiting hole 310 is arranged on the mounting part 31. In the present embodiment, a mounting clamping groove 210 is arranged at the upper end of the mounting cavity, which can accommodate the radial insertion of the mounting part 31, thereby achieving the fixed installation of the elastic steel sheet 3. In order to facilitate processing and production, reduce the production process difficulty and production cost, a horizontal baffle 21 is arranged at the upper end of the mounting cavity, and a gap is formed between the upper surface of the horizontal baffle 21 and the top surface of the mounting cavity, forming the mounting clamping groove 210. A hole for accommodating the needle body to pass through is arranged on the horizontal baffle. The end of the mounting part 31 is bent downward to form a connecting part 32 which is arc-shaped or L-shaped, increasing the elastic deformation amount. The end of the connecting part 32 forms a first protection sheet 33. The end of the first protection sheet 33 is bent upward to form a second protection sheet 34. The first protection sheet 33 and the second protection sheet 34 form a V-shaped or U-shaped protection part. In the present embodiment, the width of the connecting part 32 is smaller than the width of the mounting part 31 and the protection part, which can reduce the elastic force, avoid excessive pressure and resistance on the side wall of the needle body caused by excessive elastic force, and improve the installation reliability and the width of the protection area.

[0037] The structure of the elastic steel sheet 3 will be described in detail as follows.

[0038] Referring to Figure 7 , the elastic steel sheet 3 includes a rectangular mounting part 31. A limiting hole 310 is arranged at the center of the mounting part 31. One side of the mounting part 31 is bent downward by 90 degrees to form a first connecting part. The end of the first connecting part is bent by 10°-30° to the axis direction of the limiting hole to form a second connecting part. The end of the second connecting part extends to form a first protection sheet 33. The end of the first protection sheet 33 is inclined and bent upward to form a second protection sheet 34. The included angle between the first protection sheet 33 and the second protection sheet 34 is 30°-50°, forming a V-shaped or U-shaped protection area 340. When the needle body is located at the upper limit position, the needle is located in the protection area 340. The width of the first connecting part and the second connecting part is the same, forming an L-shaped connecting part, which is smaller than the width of the mounting part 31 and the first protection sheet and the second protection sheet. It is the elastic force providing end and deformation end of the elastic steel sheet, so that the protection part has a moving tendency. During assembly, the mounting part is inserted horizontally into the mounting clamping groove, and the entire elastic steel sheet is installed in the protection seat 2, and the needle body is inserted into the limiting hole at the same time, thereby achieving the fixation of the elastic steel sheet.

[0039] In order to further improve the safety in use, avoid the needle head from contacting with the end of the protection part and prying open the protection part, in the application, a safety slot 201 is arranged on the side wall of the installation cavity 20 and faces the protection part, in the embodiment, the safety slot faces the open end of the installation cavity and is located at the lower end of the installation cavity, when the protection part is located at the second position, the end of the second protection sheet is located in the safety slot 201, specifically, under the action of the elastic force, the end of the open end of the second protection sheet is attached in the safety slot, and then the contact with the needle head can be avoided, so that the contact between the needle head and the end of the protection part, i.e. the end of the second protection sheet 34, and the prying open of the protection part can be prevented, and the safety in use is improved, and the accidental contact between the needle body and the end of the protection part and the accidental penetration out of the second needle hole can be avoided.

[0040] In the application, the catheter seat 4 is also included for connecting with the protection seat, refer to Figures 8-10 The catheter seat 4 is in a whole cylindrical shape, an installation insertion hole is arranged on the top surface thereof, an annular limiting clamping slot is arranged on the side wall of the installation insertion hole, the cross section of the limiting clamping slot is arc-shaped, at the same time, the first cylindrical protrusion 23 is arranged at the lower end of the protection seat 2 and is coaxial with the first needle hole, the cross section of the first cylindrical protrusion 23 is the same as the cross section shape of the installation insertion hole and is circular, the first cylindrical protrusion 23 can be inserted into the installation insertion hole from top to bottom, the second limiting protrusion 231 with the arc-shaped cross section is arranged on the side wall of the first cylindrical protrusion 23, the second limiting protrusion 231 can be clamped in the limiting clamping slot and forms damping, so as to realize the detachable connection between the protection seat 2 and the catheter seat, when the needle body is taken out upwardly, the protection seat is moved upwardly under the driving of the first limiting part, the damping force between the second limiting protrusion and the limiting clamping slot is overcome, the first cylindrical protrusion is separated from the installation insertion hole, and then the separation between the protection seat and the catheter seat 4 is realized.

[0041] Refer to Figures 8-10The application also provides a puncture-proof dialysis indwelling needle using the puncture-proof protection device, which comprises a catheter seat 4, a needle handle 1 arranged at the upper end of a needle body 11, a lower-end-opened accommodating cavity 10 formed in the needle handle 1 and used for accommodating the protection seat 2, a catheter 42 arranged at the front end of the catheter seat 4 and capable of being inserted into a vein along with the needle body and remaining in the vein to form indwelling, an outer thread arranged at the tail of the catheter seat 4, an inner thread arranged at the inner wall of the accommodating cavity, the lower end of the needle handle 1 being threadedly connected to the upper end of the catheter seat 4, the lower end of the protection seat 2 being clamped to the upper end of the catheter seat 4, the needle head of the needle body being located outside the catheter 42 when the needle handle is connected to the catheter seat 4, the catheter 42 also entering the vein when the needle head is inserted into the vein, one hand holding the catheter seat and the other hand rotating the needle handle 1 to separate the needle handle 1 from the catheter seat 4, and then pulling the needle handle 1 backward and pulling out the needle body 11 from the catheter seat 4, the protection part (the second protection sheet) moving to the second position under the elastic force of the elastic steel sheet 3 (the connecting part) when the needle head is pulled out from the second needle hole upward and enters the mounting cavity, and then blocking the path of the needle head inserted into the second needle hole 20b, at this time, the protection part is located directly above the second needle hole 20b, the needle head is prevented from being inserted into the second needle hole, and the needle head is located between the mounting cavity and the protection part, and the protection seat 2 is pulled upward synchronously when the first limiting protrusion 111 of the needle body side wall contacts the limiting hole on the elastic steel sheet, the protection seat 2 is separated from the catheter seat 4 by overcoming the resistance between the limiting protrusion on the protection seat 2 and the limiting clamping groove on the catheter seat 4, at this time, the protection seat is located on the needle head of the needle body, and the puncture-proof protection is realized.

[0042] The puncture-proof protection device has the advantages that the needle head is stopped by the steel sheet structure, the structure is compact, the manufacturing process is simple and low in cost, the puncture-proof effect is good, the V-shaped protection part forms a needle head protection area, the puncture-proof protection effect is good, the structure of the elastic steel sheet is optimized, the processing is simple, the assembly is convenient and the use effect is good, the width of the connecting part of the elastic steel sheet is smaller than the width of the protection part, the protection area space is increased, the overall elastic force is reduced, the pressure on the needle body and the resistance when the needle body is pulled out are reduced, the operation feeling is good, the safety groove is arranged, the end of the second protection sheet is located in the safety groove when the protection part is located at the second position, the needle head is prevented from contacting the protection part, the needle head is prevented from prying open the protection part, the safety of the puncture-proof protection is improved, the use is reliable and stable, the limiting protrusion in the arc shape is connected to the catheter seat, the installation is convenient, the quick separation can be realized, and the use effect is good.

[0043] The preferred embodiments of the utility model are described above, and it should be noted that, for ordinary skilled persons in the technical field, some improvements and decorations can be made without departing from the technical principles of the utility model, and these improvements and decorations should also be regarded as the protection scope of the utility model.

Claims

1. A needle-puncture protection device, characterized in that: The device includes a protective base, an elastic steel sheet, and a needle body. The protective base has an open-ended mounting cavity. The upper and lower ends of the mounting cavity are respectively provided with a first needle hole and a second needle hole to allow the needle body to pass through from top to bottom. The elastic steel sheet is disposed in the mounting cavity. The upper end of the elastic steel sheet is provided with a limiting hole to allow the needle body to pass through. The front side wall of the needle body is provided with a first limiting protrusion to prevent the needle body from being pulled upward from the limiting hole. The lower end of the elastic steel sheet is bent toward the needle body to form a protective part, which has a first position and a second position. When the needle tip of the needle body passes through the second needle hole, the protective part is in the first position, presses against the side wall of the needle body, and has a tendency to move closer to the needle body; When the needle tip of the needle body is pulled out of the second needle hole, the protective part loses the support of the needle body and moves to the second position under the action of elasticity, blocking the path of the needle tip to be inserted into the second needle hole.

2. The anti-needle-puncture protection device as described in claim 1, characterized in that: The protective part is V-shaped or U-shaped.

3. The anti-needle-puncture protection device as described in claim 1, characterized in that: The elastic steel sheet includes a mounting portion for fixing to the mounting cavity, a limiting hole is formed on the mounting portion, the end of the mounting portion is bent downward to form a connecting portion, the end of the connecting portion forms a first protective plate, the end of the first protective plate is bent upward to form a second protective plate, and a V-shaped or U-shaped protective portion is formed between the first protective plate and the second protective plate.

4. The anti-needle-puncture protection device as described in claim 3, characterized in that: The width of the connecting part is smaller than the width of the mounting part and the protective part.

5. The anti-needle-puncture protection device as described in claim 3, characterized in that: The connecting part is arc-shaped or L-shaped.

6. The anti-needle-puncture protection device as described in claim 3, characterized in that: The mounting cavity is provided with a mounting slot that allows the mounting part to be inserted radially and to install the elastic steel sheet.

7. The anti-needle-puncture protection device as described in claim 1, characterized in that: The lower sidewall of the mounting cavity is provided with a safety groove facing the protective part. When the protective part is in the second position, its end is located in the safety groove and can avoid contact with the needle tip of the needle body.

8. The anti-needle-puncture protection device as described in claim 1, characterized in that: It also includes a conduit seat, the top of which has an installation hole, and the side wall of the installation hole has a limiting groove. The lower end of the protective seat has a first cylindrical protrusion that can be inserted into the installation hole. The side wall of the first cylindrical protrusion has a second limiting protrusion with an arc-shaped cross-section. The second limiting protrusion can be engaged in the limiting groove and form damping.

9. The anti-needle-puncture protection device as described in claim 1, characterized in that: The top of the protective base is provided with a second cylindrical protrusion, and the first pinhole penetrates through the second cylindrical protrusion.

10. A needle-proof dialysis indwelling needle, characterized in that: Use the anti-needle-puncture protection device as described in any one of claims 1-9.

Images