Automatic needle removal structure and infusion device

Abstract

The present invention discloses an automatic needle removal structure, including a bracket and a push piece, wherein the bracket is used to be fixed to the outside of the needle seat and is located below the needle, and the push piece is movably connected to the bracket, and the bracket is provided with a guide structure for supporting and guiding the reciprocating motion of the push piece, and the push piece is provided with a needle removal bevel shovel, and the upper surface of the needle removal bevel shovel is used to contact the lower end of the needle and the upper surface of the needle removal bevel shovel is arranged obliquely relative to the movement direction of the push piece. The present invention can achieve the purpose of automatic needle removal after operations such as infusion or blood collection are completed, and the operation is simple and does not affect clinical use, thereby greatly reducing the probability of medical staff being pricked by needles, and achieving safe and effective protection. The present invention also discloses an infusion device including the above-mentioned automatic needle removal structure.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an automatic needle removal structure and an infusion device. Background Art

[0002] According to statistics, 80% to 90% of the causes of blood-borne infectious diseases among healthy medical staff are caused by needle sticks, and 80% of the injured medical staff are nurses. Safe infusion is attracting more and more attention from society and hospitals. It is the goal that the medical industry is committed to achieving to promote infectious disease prevention, effectively avoid injuries and cross-infection caused by intravenous needle sticks to medical staff, and provide patients and medical staff with a safe and healthy medical environment.

[0003] In order to prevent medical staff from being pricked by needles, a common solution in the prior art is to provide a device on the needle holder to shield or wrap the needle. For example, patent CN207679799U discloses an anti-needlestick arterial blood gas needle device. The safety structure of the patent is a needle cap fixed on the needle holder. After blood collection is completed, the protective device is pushed to wrap the needle. The medical staff removes the wrapped needle and covers it with a sealing cap to protect the safety of patients and clinical operators.

[0004] However, the prior art has the following disadvantages: 1. The existing protective device has a complex structure; 2. It is inconvenient for medical staff to operate during use, and it is easy to block the line of sight, and there are still certain safety hazards.

[0005] Therefore, how to provide an anti-needle puncture structure that is easy to operate and effectively protects is a technical problem that those skilled in the art currently need to solve. Summary of the invention

[0006] In view of this, the object of the present invention is to provide an automatic needle removal structure, which can conveniently realize automatic needle removal after injection or blood collection, is easy to operate, and does not affect clinical use. Another object of the present invention is to provide an infusion device including the automatic needle removal structure.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] An automatic needle unloading structure comprises a bracket and a pushing piece, wherein the bracket is used to be fixed to the outside of the needle seat and is located below the needle head, the pushing piece is movably connected to the bracket, the bracket is provided with a guide structure for supporting and guiding the reciprocating motion of the pushing piece, the pushing piece is provided with a needle unloading oblique shovel, the upper surface of the needle unloading oblique shovel is used to contact the lower end of the needle head and the upper surface of the needle unloading oblique shovel is inclined relative to the movement direction of the pushing piece.

[0009] Preferably, the bracket comprises a support plate, and the support plate is provided with a needle seat opening for the needle seat to pass through.

[0010] Preferably, the guide structure includes guide ribs arranged on the upper surface of the support plate, and the upper surface of the support plate and the guide ribs together form a guide groove for guiding the reciprocating motion of the ejection member, and the guiding direction of the guide groove extends along the tangential direction of the needle seat. The ejection member includes a push piece and the needle unloading bevel shovel located at the end of the push piece, and the push piece together with the needle unloading bevel shovel slides in cooperation with the guide groove.

[0011] Preferably, the upper surface of the support plate is provided with two parallel guide ribs located on both sides of the needle seat, and the ejection member includes two parallel ejection pieces and the needle ejection oblique shovel.

[0012] Preferably, a limiting block is provided between the guide rib and the ejection member.

[0013] Preferably, a reset elastic member is provided between the push-out member and the bracket, one end of the reset elastic member acts on the bracket and the other end of the reset elastic member acts on the push-out member.

[0014] Preferably, the automatic needle removal structure provided in the present solution also includes a needle fastening structure, which includes an arc plate structure extending partially circumferentially along the outer side of the needle seat, the arc of the arc plate structure is less than or equal to π, and the inner side of the arc plate structure is provided with a threaded structure for fastening the needle, the needle fastening structure is reciprocatingly connected relative to the bracket, and the movement direction of the needle fastening structure is consistent with the movement direction of the needle removal oblique shovel.

[0015] Preferably, the needle fastening structure is fixedly connected to the push piece.

[0016] Preferably, the automatic needle removal structure provided by the present solution further comprises a shell covering the outside of the bracket and the ejection member, and the relative position of the shell and the bracket is fixed.

[0017] The working principle of the automatic needle removal structure provided by this solution is as follows:

[0018] The automatic needle removal structure is pre-assembled on the infusion device so that the bracket is fixed on the outside of the needle seat and located below the needle. At this time, the connector part of the needle is connected to the connector part of the needle seat to realize clinical infusion or blood collection and other operations; after the infusion or blood collection is completed, the ejection piece is manually pushed, and as the ejection piece moves relative to the bracket, the upper surface of the needle removal inclined shovel pries up the needle, so that the needle falls off the needle seat, and the needle removal operation is realized.

[0019] The present invention also provides an infusion device, comprising a needle, a needle holder and the automatic needle removal structure. The derivation process of the beneficial effects of the infusion device is generally similar to the derivation process of the beneficial effects brought about by the automatic needle removal structure, so it will not be repeated herein.

[0020] Preferably, the infusion device is a syringe.

[0021] Preferably, the infusion device is an arterial blood gas needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of an automatic needle removal structure provided in a first specific embodiment of the present invention;

[0024] Figure 2 It is a schematic diagram of the automatic needle removal structure and the syringe assembly exploded view in the first specific embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the support structure in a specific embodiment of the present invention;

[0026] Figure 4 It is a schematic diagram of the fastening structure of the ejection member and the needle in the first specific embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the automatic needle removal structure in the second specific embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the automatic needle removal structure in the third specific embodiment of the present invention.

[0029] Figures 1 to 6 middle:

[0030] 1-bracket, 2-discharging part, 3-reset spring, 4-housing, 5-needle fastening structure, 6-needle, 7-needle seat, 8-syringe, 11-guide rib, 12-limiting block, 13-spring fixing plate, 14-bracket inclined rail, 15-bracket support pin, 16-housing clamping hole, 21-push plate, 22-needle unloading inclined shovel, 23-guide spring sheet, 24-push plate guide groove, 25-inclined rail spring sheet, 51-arc plate push plate. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in 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, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Please refer to Figures 1 to 6 , Figure 1 A schematic diagram of an automatic needle removal structure provided in a first specific embodiment of the present invention; Figure 2 It is a schematic diagram of the automatic needle removal structure and the syringe assembly exploded view in the first specific embodiment of the present invention; Figure 3 This is a schematic diagram of the support structure in a specific embodiment of the present invention; Figure 4 It is a schematic diagram of the fastening structure of the ejection member and the needle in the first specific embodiment of the present invention; Figure 5 This is a schematic diagram of the automatic needle removal structure in the second specific embodiment of the present invention; Figure 6 This is a schematic diagram of the automatic needle removal structure in the third specific embodiment of the present invention.

[0033] In order to realize automatic needle removal of the infusion device and reduce the probability of medical staff being pricked by needles, the present invention provides an automatic needle removal structure, including a bracket 1 and a push piece 2, the bracket 1 is used to be fixed to the outside of the needle seat 7 and is located below the needle 6, the push piece 2 is movably connected to the bracket 1, the bracket 1 is provided with a guide structure for supporting and guiding the reciprocating motion of the push piece 2, the push piece 2 is provided with a needle removal bevel shovel 22, the upper surface of the needle removal bevel shovel 22 is used to contact the lower end of the needle 6 and the upper surface of the needle removal bevel shovel 22 is inclined relative to the movement direction of the push piece 2.

[0034] The working principle of the automatic needle removal structure provided by this solution is as follows:

[0035] The automatic needle removal structure is pre-assembled on the syringe 8 of the infusion device, so that the bracket 1 is fixed on the outside of the needle seat 7 and is located below the needle 6. At this time, the joint part of the needle 6 is connected to the joint part of the needle seat 7 to realize clinical infusion or blood collection and other operations; after the infusion or blood collection is completed, the pusher 2 is manually pushed, and the pusher 2 moves toward the center of the needle 6 along the guide structure. As the pusher 2 moves relative to the bracket 1, the upper surface of the needle removal bevel shovel 22 pries up the needle 6, so that the needle 6 falls off the needle seat 7, and the needle removal operation is realized.

[0036] It should be noted that the bracket 1 is used to provide support for the ejector 2. The bracket 1 can be designed in various structural forms, such as a frame structure, a plate structure or a cylindrical structure. Preferably, the bracket 1 includes a support plate, and the support plate is provided with a needle seat opening for the needle seat 7 to pass through, such as Figure 3Further preferably, in order to ensure that the support 1 can be firmly fixed on the syringe 8, a fixing cylinder for cooperating with the outer wall of the syringe 8 is also fixed below the support plate.

[0037] It should be noted that the guide structure in the present embodiment can be designed as a variety of structural forms such as guide ribs, guide grooves, guide rods, etc. Preferably, the guide structure includes a guide rib 11 provided on the upper surface of the support plate, such as Figure 3 As shown, the number of guide ribs 11 can be multiple, and the upper surface of the support plate and the guide ribs 11 together form a guide groove for guiding the reciprocating motion of the ejection member 2, and the guiding direction of the guide groove extends along the tangential direction of the needle seat 7. The ejection member 2 includes a push piece 21 and a needle unloading inclined shovel 22 located at the end of the push piece 21, and the push piece 21 and the needle unloading inclined shovel 22 are slidably matched with the guide groove. When in use, pushing the ejection member 2 can drive the push piece 21 and the needle unloading inclined shovel 22 to slide in the guide groove.

[0038] Further preferably, the upper surface of the support plate is provided with two parallel guide ribs 11 located on both sides of the needle seat 7, and the ejector 2 includes two parallel push pieces 21 and a needle unloading inclined shovel 22. By providing two parallel guide ribs 11 and providing two push pieces 21 and a needle unloading inclined shovel 22 on the ejector 2, the stability during the pushing process can be further ensured, and the ejector 2 can be prevented from getting stuck during the sliding process.

[0039] Preferably, a limit block 12 is provided between the guide rib 11 and the ejection member 2. Figure 3 The limit block 12 is used to limit the relative movement limit position between the ejector 2 and the guide rib 11 to prevent the two from coming out of and separating from each other, and also ensure that the needle 6 is stably installed on the needle seat 7 in the initial state.

[0040] Preferably, the push member 2 is further provided with a guide spring 23 on the outside of the push piece 21. Figure 4 As shown, the outer side surfaces of the two guide ribs 11 are arranged obliquely, and the two outer side surfaces gradually move away from each other in the extension direction from the ejector 2 to the needle seat 7. The two guide springs 23 are slidably matched with the outer side surfaces of the guide ribs 11. When the ejector 2 moves toward the needle seat 7, the two guide springs 23 gradually open under the guidance of the guide ribs 11. At the same time, the ejector 21 moves linearly inside the two guide ribs 11 and pries up the needle 6 by using the needle unloading inclined shovel 22. Since the guide springs 23 are elastic, when the ejector 2 reaches the position where the needle is unloaded, the opening angle of the two guide springs 23 reaches the maximum. At this time, the thrust on the ejector 2 is released, and the guide springs 23 automatically retract backwards under the action of their own elastic force, that is, during the recovery process of the guide springs 23, the ejector 2 moves toward the initial position until the end of the guide springs 23 is stuck at the limit block 12 outside the guide rib 11.

[0041] When the guide structure only has a linear guiding function, and the ejector 2 is not provided with an elastic structure that can automatically restore such as the guide spring sheet 23, in order to enable the ejector 2 to automatically restore to the initial position after reaching the needle removal position, preferably, the present solution further provides a reset elastic member between the ejector 2 and the bracket 1. The reset elastic member can be selected from structures such as springs, elastic blocks, torsion springs, metal spring sheets, etc. Preferably, the reset elastic member in the present solution is a reset spring 3, such as Figure 1 As shown, one end of the return spring 3 acts on the bracket 1 and the other end acts on the pusher 2. The return spring 3 can make the pusher 2 and the bracket 1 move away from each other and return to the initial position. Specifically, the present solution sets a spring fixing plate 13 on the bracket 1, as shown in FIG. Figure 1 and Figure 3 As shown, one end of the return spring 3 acts on the spring fixing plate 13 and the other end acts on the end plate of the ejector 2 .

[0042] like Figure 1 and Figure 4 As shown, preferably, the automatic needle removal structure provided by the present solution also includes a needle fastening structure 5, which includes a circular plate structure extending along the outer side of the needle seat 7 in a partially circumferential direction, the arc of the circular plate structure is less than or equal to π, and a threaded structure for fastening the needle 6 is provided on the inner side of the circular plate structure, and the needle fastening structure 5 is reciprocatingly connected to the bracket 1, and the movement direction of the needle fastening structure 5 passes through the midpoint of the circular arc of the circular plate structure and the axis of the needle seat 7, that is, the movement direction of the needle fastening structure 5 is consistent with the movement direction of the needle removal oblique shovel 22. Figure 4 As shown, the needle fastening structure 5 and the ejector 2 are arranged on both sides of the needle seat 7 relative to each other. In the initial state, the needle 6 is fixed on the needle seat 7. At the same time, the threaded structure of the needle fastening structure 5 cooperates with the external thread of the needle 6 to prevent the needle 6 from falling out. When the ejector 2 moves toward the center of the needle seat 7, the push piece 21 drives the needle unloading shovel 22 to pry up the lower end of the needle 6. At the same time, the needle fastening structure 5 is separated from the needle 6, thereby releasing the threaded cooperation with the needle 6. At this time, the needle 6 can be smoothly separated from the needle seat 7.

[0043] It should be noted that the needle fastening structure 5 can be fixedly connected to the end of the needle unloading inclined shovel 22, or can abut against the end of the needle unloading inclined shovel 22. Preferably, the needle fastening structure 5 is fixedly connected to the ejector 2 and moves synchronously with the ejector 2.

[0044] In the third embodiment, the needle fastening structure 5 is separated from the push piece 2. Figure 6 As shown, the working process of this solution is consistent with the above embodiment, except that after the needle is removed, the needle fastening structure 5 needs to be pushed in the reverse direction to restore it to its initial state.

[0045] In the second embodiment, the guide structure of the bracket 1 includes a bracket inclined rail 14 arranged on the upper surface of the support plate, such as Figure 5 As shown, the bracket ramp 14 is provided with two symmetrical guide ramps arranged obliquely relative to the moving direction of the ejection member 2, the needle fastening structure 5 is arranged separately from the ejection member 2, and the end of the needle fastening structure 5 facing the ejection member 2 is provided with two ramp springs 25 that slide with the above-mentioned guide ramps, and the bracket 1 is also provided with a bracket support pin 15, and the two push pieces 21 of the ejection member 2 are provided with push piece guide grooves 24 that slide relative to the bracket support pin 15, and the push piece guide grooves 24 are obliquely arranged long holes, and the push piece guide grooves 24 gradually tilt upward from the ejection member 2 to the needle seat 7. The working process of this specific embodiment is as follows: when it is in the initial state, the needle 6 is fixed on the needle seat 7, and at the same time, the bracket support pin 15 is located at the highest point of the push piece guide groove 24, the threaded structure of the needle fastening structure 5 is threadedly matched with the needle 6, and the ramp spring piece 25 of the needle fastening structure 5 is located at one end of the bracket ramp 14 facing the ejection member 2 and the distance between the two ramp spring pieces 25 is in the maximum state. After the infusion is completed, the ejector 2 is manually pushed, so that the pusher 21 drives the needle unloading inclined shovel 22 to move toward the center of the needle seat 7. At the same time, the support pin 15 of the bracket slides toward the lower end of the pusher guide groove 24. Under the sliding cooperation between the support pin 15 and the pusher guide groove 24, the needle unloading inclined shovel 22 of the ejector 2 is pried upward, thereby prying the bottom of the needle 6 upward. At the same time, the needle fastening structure 5 moves away from the needle 6 under the pushing action of the ejector 2, and the two inclined rail springs 25 slide and gradually approach in the support inclined rail 14. After the needle fastening structure 5 is separated from the needle 6, the thread restriction effect on the needle 6 is released, and the needle 6 can be separated from the needle seat 7. After the needle is unloaded, the arc plate push plate 51 on the outer side of the needle fastening structure 5 is pushed in the opposite direction to restore the needle fastening structure 5 and the ejector 2 to the initial state. At the same time, since the bevel spring piece 25 is elastic, when the bevel spring piece 25 follows the needle fastening structure 5 to the needle unloading position, the elastic deformation of the two bevel spring pieces 25 reaches the maximum. At this time, if the needle fastening structure 5 is released, the two bevel spring pieces 25 will drive the needle fastening structure 5 to move toward the needle seat 7 under their own elastic force, thereby restoring to the initial state. In this solution, the whole process of locking, unloading and resetting is realized through two pushing actions.

[0046] like Figure 1 , Figure 2 and Figure 6 As shown, preferably, the automatic needle removal structure provided by the present solution further includes a housing 4 which is covered on the outside of the bracket 1 and the ejection member 2. The housing 4 is fixed relative to the bracket 1 to fasten the other accessories. Specifically, the present solution provides a housing clamping hole 16 on the bracket 1. Figure 3As shown, correspondingly, a buckle structure for engaging with the housing 4 is provided below the housing 4. When installing, the buckle only needs to be engaged with the housing engaging hole 16. In addition, a reinforcing rib is provided on the housing 4 to play a reinforcing role.

[0047] The present invention has the following beneficial effects:

[0048] 1) During the infusion or blood collection process, the needle fastening structure 5 can be used to lock the needle 6 to ensure smooth infusion;

[0049] 2) After the infusion or blood collection is completed, the needle can be removed automatically and conveniently;

[0050] 3) The sealing joint can be locked after automatic resetting;

[0051] 4) Simple operation, all operations can be completed with just one push action;

[0052] 5) The structure is simple, the user's operation process is comfortable, it does not block the line of sight, and the product is safe and effective;

[0053] 6) The product has the advantages of simple structure, easy processing, installation and low cost.

[0054] The present invention also provides an infusion device, comprising a needle 6, a needle seat 7 and the above-mentioned automatic needle removal structure. The derivation process of the beneficial effects produced by the infusion device is generally similar to the derivation process of the beneficial effects brought by the above-mentioned automatic needle removal structure, so it will not be repeated in this article.

[0055] Preferably, the infusion device is a syringe.

[0056] Preferably, the infusion device is an arterial blood gas needle.

[0057] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic needle removal structure, characterized in that: The invention comprises a support (1) and a push piece (2), wherein the support (1) is used to be fixed on the outside of the needle seat (7) and is located below the needle (6), and the push piece (2) is movably connected to the support (1), and the support (1) is provided with a guide structure for supporting and guiding the reciprocating movement of the push piece (2), and the push piece (2) is provided with a needle unloading oblique shovel (22), and the upper surface of the needle unloading oblique shovel (22) is used to contact the lower end of the needle (6) and the upper surface of the needle unloading oblique shovel (22) is arranged obliquely relative to the movement direction of the push piece (2); The support (1) comprises a support plate, the support plate being provided with a needle seat opening for the needle seat (7) to pass through; The guide structure comprises a guide rib (11) arranged on the upper surface of the support plate, the upper surface of the support plate and the guide rib (11) together form a guide groove for guiding the reciprocating motion of the ejection member (2), the guiding direction of the guide groove extends along the tangential direction of the needle seat (7), the ejection member (2) comprises a push piece (21) and the needle unloading oblique shovel (22) located at the end of the push piece (21), the push piece (21) together with the needle unloading oblique shovel (22) are slidably matched with the guide groove; It also includes a needle fastening structure (5), which includes an arc plate structure extending partially circumferentially along the outer side of the needle seat (7), the arc of the arc plate structure is less than or equal to π, and the inner side of the arc plate structure is provided with a threaded structure for fastening the needle (6), the needle fastening structure (5) is reciprocatingly connected relative to the bracket (1), and the movement direction of the needle fastening structure (5) is consistent with the movement direction of the needle unloading shovel (22).

2. The automatic needle removal structure according to claim 1, characterized in that: The upper surface of the support plate is provided with two parallel guide ribs (11) located on both sides of the needle seat (7), and the ejection member (2) comprises two parallel ejection plates (21) and the needle ejection oblique shovel (22).

3. The automatic needle removal structure according to claim 1, characterized in that: A limiting block (12) is provided between the guide rib (11) and the ejection member (2).

4. The automatic needle removal structure according to claim 1, characterized in that: A resetting elastic member is provided between the push-off member (2) and the bracket (1), one end of the resetting elastic member acts on the bracket (1) and the other end acts on the push-off member (2).

5. The automatic needle removal structure according to claim 1, characterized in that: The needle fastening structure (5) is fixedly connected to the ejection member (2).

6. The automatic needle removal structure according to claim 1, characterized in that: It also comprises a shell (4) which is arranged outside the bracket (1) and the push-off member (2), and the relative position of the shell (4) and the bracket (1) is fixed.

7. An infusion device, characterized in that: It comprises a needle (6), a needle seat (7) and an automatic needle unloading structure as claimed in any one of claims 1 to 6.

8. The infusion device according to claim 7, characterized in that The infusion device is a syringe.

9. The infusion device according to claim 7, characterized in that The infusion device is an arterial blood gas needle.

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