CN213724111U - Remaining needle with automatic resilience function - Google Patents
Remaining needle with automatic resilience function Download PDFInfo
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- CN213724111U CN213724111U CN202022595015.0U CN202022595015U CN213724111U CN 213724111 U CN213724111 U CN 213724111U CN 202022595015 U CN202022595015 U CN 202022595015U CN 213724111 U CN213724111 U CN 213724111U
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- 238000005452 bending Methods 0.000 claims description 8
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- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 230000023597 hemostasis Effects 0.000 description 10
- 238000001802 infusion Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- HTTJABKRGRZYRN-UHFFFAOYSA-N Heparin Chemical compound OC1C(NC(=O)C)C(O)OC(COS(O)(=O)=O)C1OC1C(OS(O)(=O)=O)C(O)C(OC2C(C(OS(O)(=O)=O)C(OC3C(C(O)C(O)C(O3)C(O)=O)OS(O)(=O)=O)C(CO)O2)NS(O)(=O)=O)C(C(O)=O)O1 HTTJABKRGRZYRN-UHFFFAOYSA-N 0.000 description 7
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- 238000000926 separation method Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
本实用新型涉及一种具有自动回弹功能的留置针，包括导管座、留置导管、穿刺针以及针座，导管座内构造有贯穿导管座两端的内部流道，留置导管设置于导管座的前端，导管座的侧壁构造有延长臂；还包括压缩弹簧、导向组件及限位部件，压缩弹簧设置于内部流道内，压缩弹簧的两端分别固定于导管座和导向组件，导向组件可移动的设置于内部流道内，且导向组件构造有用于通过穿刺针的中心通孔，限位部件设置于导向组件，导管座构造有限位孔，针座构造有凸起部，穿刺针的尾端固定于凸起部，当限位部件卡在限位孔时，压缩弹簧处于压缩状态，当限位部件从限位孔释放时，压缩弹簧驱动导向组件沿内部通道移动所设定的距离，以便实现自动回弹穿刺针的功能。
The utility model relates to an indwelling needle with automatic rebound function. , the side wall of the catheter seat is configured with an extension arm; it also includes a compression spring, a guide assembly and a limit component, the compression spring is arranged in the internal flow channel, the two ends of the compression spring are respectively fixed to the catheter seat and the guide assembly, and the guide assembly is movable. It is arranged in the internal flow channel, and the guide assembly is configured with a central through hole for passing the puncture needle, the limiting member is arranged in the guide assembly, the catheter seat is configured with a limiting hole, the needle seat is configured with a raised portion, and the tail end of the puncture needle is fixed on the puncture needle. The convex part, when the limiting part is stuck in the limiting hole, the compression spring is in a compressed state, when the limiting part is released from the limiting hole, the compression spring drives the guide assembly to move the set distance along the inner channel, so as to realize automatic The function of the rebound puncture needle.
Description
Technical Field
The utility model relates to the technical field of medical equipment, concretely relates to keep somewhere needle with automatic resilience function.
Background
The indwelling needle is a medical apparatus used for vein indwelling transfusion, is mainly applied to clinical vein puncture, takes medicine and provides nutrition for a patient, can avoid blood vessel injury caused by multiple puncture and relieve the pain of the patient, is favorable for reducing the operation intensity of nurses, and is widely applied in clinic.
The existing indwelling needle generally comprises a catheter seat, an indwelling catheter, a puncture needle (or called as a steel needle and a needle core) and an extension tube, wherein an internal flow passage is formed in the catheter seat, the indwelling catheter is arranged at the front end of the catheter seat and communicated with the internal flow passage, an extension arm is formed on the side wall of the catheter seat and communicated with the internal flow passage, one end of the extension tube is communicated with the extension arm, and the other end of the extension tube is communicated with a common transfusion tee (generally provided with a heparin cap); the tail end of the puncture needle is usually fixed on a needle seat, the side surface of the needle seat is provided with a needle wing for operation, and in addition, a hemostatic component is usually arranged between the extension arm and the rear end of the catheter seat; when the indwelling needle is assembled, the puncture needle is inserted into the internal flow passage from the rear end of the catheter holder and penetrates through the hemostatic component and the indwelling catheter in sequence through the internal flow passage, and the front end of the puncture needle protrudes out of the indwelling catheter, when the indwelling needle is actually used, the puncture needle protruding out of the indwelling catheter is needed to be used for puncturing so as to synchronously insert the front end of the indwelling catheter into a blood vessel of a patient, after the front end of the puncture needle enters the blood vessel, the puncture needle is generally needed to be drawn back through the needle wing and/or the needle holder, and according to the specification, the drawing back distance is generally about 0.5cm so as to retract the needle tip of the puncture needle into the indwelling catheter, so that the situation that the exposed needle tip can stab or puncture the blood vessel in the process of continuing needle insertion is avoided; however, the existing indwelling needle needs the medical staff to manually control the withdrawal distance according to experience, not only needs to maintain the whole indwelling needle in the process of withdrawing the puncture needle, but also needs to control the withdrawal distance, and especially when the indwelling needle is set for children, the operation is complex and troublesome, the withdrawal distance cannot be accurately controlled, and the improvement is needed urgently.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to improve the not enough that exists among the prior art, provide a compact structure, reasonable in design's needle of keeping somewhere, have automatic resilience function, can keep somewhere the in-process of needle in the setting, convenient, accurate with the distance that the pjncture needle pumpback was set for to can effectively solve the not enough that prior art exists.
The utility model adopts the technical proposal that:
in order to solve the problem of the automatic rebound of the puncture needle for a set distance, the indwelling needle with the automatic rebound function comprises a catheter seat, an indwelling catheter, a puncture needle and a needle seat, wherein an internal flow passage penetrating through two ends of the catheter seat is constructed in the catheter seat, the indwelling catheter is arranged at the front end of the catheter seat and communicated with the internal flow passage, an extension arm is constructed on the side wall of the catheter seat and communicated with the internal flow passage,
the puncture needle catheter also comprises a compression spring, a guide component and a limiting part, wherein the compression spring is arranged in the internal flow passage, one end of the compression spring is fixed on the catheter seat, the other end of the compression spring is connected with the guide component, the guide component is movably arranged in the internal flow passage and is provided with a central through hole for passing through the puncture needle, the limiting part is arranged on the guide component, the side wall of the catheter seat is provided with a limiting hole matched with the limiting part,
the needle seat is provided with a bulge which is matched with the guide component and is used for being inserted into the internal flow passage, the tail end of the puncture needle is fixed on the bulge,
when the limiting part is clamped in the limiting hole, the compression spring is in a compressed state, and when the limiting part is released from the limiting hole, the compression spring drives the guide assembly to move for a set distance along the internal channel. In the scheme, the compression spring, the guide assembly and the limiting part are arranged in the internal channel, the guide assembly and the internal channel can form a moving pair, and the guide assembly and the limiting part can move together along the internal channel to change the state of the compression spring; the limiting hole is formed in the side wall of the catheter seat, the limiting hole can be matched with the limiting part, so that when the limiting part is moved to a set position, the limiting part can be clamped at the limiting hole, the compression spring is kept in a compressed state, elastic potential energy is stored, after the limiting part is released from the limiting hole, the compression spring loses restraint, the stored elastic potential energy can be used for driving the guide assembly to move for a set distance along the internal channel, the needle seat is synchronously driven to move along the direction far away from the puncture point, the purpose of driving the puncture needle to automatically rebound for the set distance is achieved, the needle tip of the puncture needle can retract into the indwelling catheter, in the process of continuing to advance the needle, the situation that the blood vessel is punctured or punctured due to the fact that the needle tip exposed out of the indwelling catheter is avoided, and the defects in the prior art are effectively overcome.
Furthermore, the blood blocking device also comprises a hemostasis component which can penetrate through the puncture needle, wherein the hemostasis component is arranged in the internal flow passage and is positioned between the extension arm and the compression spring and used for preventing blood from being blocked. The setting of hemostasis part, both can prevent that blood from flowing into and flowing out from the other end from the one end of internal flow way, reach separation blood, make blood can only flow along the extension arm, can make the pjncture needle pass again, so that the front end of pjncture needle can insert in the indwelling catheter, so that puncture, in addition, the setting of hemostasis part, can also effectively retrain the pjncture needle, increase the resistance that the pjncture needle deviate from in the catheter holder, thereby can effectively prevent that the pjncture needle from deviating from the catheter holder by oneself, thereby can play the purpose of restraint pjncture needle and needle file.
Preferably, the hemostatic component is a rubber plug or a silica gel plug. When hemostasis part adopts rubber buffer or silica gel stopper, make puncture needle can be smooth pass hemostasis part, on the one hand, can play above-mentioned separation blood, the purpose of restraint pjncture needle and needle file, on the other hand, because rubber buffer or silica gel stopper have better elasticity, can produce elastic deformation, after the puncture needle passes hemostasis part, because elastic deformation's reason, hemostasis part has certain pressure to the lateral wall of puncture needle, thereby separation blood that can be better, and after the puncture needle withdraws from hemostasis part, because elastic deformation's reason, hemostasis part can the state when the automatic recovery is original, thereby better separation blood, prevent blood loss.
Preferably, the guide assembly comprises a guide block and a transmission block, the guide block and the internal flow channel form a moving pair, the transmission block is connected with the guide block and arranged on one side of the guide block, the central through hole is respectively formed in the guide block and the transmission block, the inner diameter of the central through hole is larger than the outer diameter of the puncture needle,
the transmission block is of a cylindrical structure, and the outer diameter of the transmission block is smaller than the inner diameter of the inner flow passage;
one end of the limiting part is fixed on the guide block and is positioned between the side wall of the transmission block and the side wall of the internal flow passage. In this scheme, the guide block constitutes the sliding pair with inside runner, so that alright remove along inside runner, and the transmission piece is used for contacting the bellying of needle file, so that to needle file transmission power, and set up and to pass the direction subassembly through central through-hole in the pjncture needle of needle file, and be fixed in the guide block with spacing part's one end, make when spacing part from spacing hole release back, just in time be located between the lateral wall of transmission piece and inside runner's the lateral wall, thereby make spacing part can be with the direction subassembly synchronous motion together, and when removing the position department in spacing hole, spacing part just in time can go into spacing downthehole by the situation card, reach the purpose of locking compression spring.
Preferably, the guide block and the transmission block are of an integral structure.
Preferably, the limiting hole is configured in a square structure,
and/or the presence of a gas in the gas,
the limiting component is an elastic clamping piece.
For better locking spring, it is preferred, the one end of elasticity card is fixed in the direction subassembly is followed and is kept away from the direction subassembly, the elasticity card is constructed and is had arch portion to other end at the elasticity card is constructed and is bent the portion, arch portion is used for the card to be gone into spacing hole, the portion of bending is used for preventing that the elasticity card from deviating from spacing hole. Through constructing the arch part, the medical staff can be conveniently released from the limiting hole through the pressing mode by matching with the limiting hole and locking the compression spring.
For solving the easy automatic problem of releasing from spacing hole of elasticity card, it is further, the side construction in spacing hole has the draw-in groove, the draw-in groove includes spacing face, spacing face is the plane that arcwall face or slope set up, the side construction of arch portion be for with draw-in groove looks adaptation, spacing face is used for guiding the direction removal of direction subassembly to compression spring. In this scheme, through setting up the draw-in groove to construct spacing face, make when spacing part card is in during spacing hole, because compression spring's elastic action, the side of arch portion can block into in the draw-in groove to with spacing face looks adaptation, because spacing face slope sets up, make elasticity card can not be simple under the effect of external force to spacing downthehole removal, but can drive the direction removal of direction subassembly to compression spring in step, just can reach the purpose of release elasticity card, thereby effectively solve the easy automatic problem of releasing from spacing hole of elasticity card.
To facilitate the mounting and fixing of the spring, it is preferred that the internal flow channel is configured with at least one step. So that one end of the spring is mounted at the step, which is advantageous for an optimal design and for a simplified assembly.
Furthermore, the telescopic arm is characterized by further comprising an extension pipe, wherein one end of the extension pipe is fixed on the extension arm and is communicated with the extension arm.
The infusion tee joint is provided with a heparin cap, and the other end of the extension pipe is connected with the infusion tee joint and communicated with the heparin cap. So that the heparin cap is connected with the infusion apparatus, thereby conveniently and safely constructing an infusion channel.
For convenience of operation, the side surface of the needle seat is further provided with a needle wing for operation. Through setting up the needle wing, the medical personnel of being convenient for hold in the in-process that sets up the indwelling needle to the medical personnel of being more convenient for sets up the indwelling needle.
Compared with the prior art, use the utility model provides a pair of keep somewhere needle with automatic kick-back function, compact structure, reasonable in design have automatic kick-back function, can keep somewhere the in-process of needle in the setting, convenient, accurate with the distance that the pjncture needle pumpback was set for, not only can effectively solve the not enough of prior art existence, but also have with low costs, easy and simple to handle's characteristics, be favorable to setting up more conveniently and keep somewhere the needle, be particularly useful for keeping somewhere the needle for children's setting.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of an indwelling needle having an automatic rebound function provided in example 1.
Fig. 2 is a partial cross-sectional view of fig. 1.
Fig. 3 is a view a-a of fig. 1, with a stop member captured at the stop hole.
Fig. 4 is a partially enlarged schematic view of fig. 3.
FIG. 5 is a partial sectional view showing the indwelling needle having the automatic resilient function according to embodiment 1 after the stopper member is released from the stopper hole.
Fig. 6 is a schematic view of the indwelling needle having the automatic resilient function according to embodiment 1, after the needle tip of the puncture needle is automatically retracted to a predetermined position inside the indwelling catheter.
Fig. 7 is a schematic view of the indwelling needle having the automatic resilient function provided in example 1 during withdrawal of the puncture needle.
Description of the drawings
A needle seat 201, a convex part 202, a puncture needle 203, a needle wing 204,
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
Referring to fig. 1-7, in the present embodiment, there is provided an indwelling needle with an automatic rebounding function, including a catheter hub 101, an indwelling catheter 102, a puncture needle 203 and a needle hub 201, the catheter hub 101 may be made of plastic, an internal flow channel 105 penetrating through two ends of the catheter hub 101 is formed in the catheter hub 101, the indwelling catheter 102 is made of plastic tube, is fixed to the front end of the catheter hub 101 and is communicated with the internal flow channel 105, an extension arm 103 is formed on the side wall of the catheter hub 101, and the extension arm 103 is communicated with the internal flow channel 105, as shown in fig. 1-7,
in this embodiment, the indwelling needle further comprises a compression spring 301, a guide component and a limiting component 304, wherein the compression spring 301 is arranged in the internal flow channel 105, one end of the compression spring 301 is fixed on the catheter seat 101, and the other end of the compression spring 301 is connected with the guide component, in this embodiment, the internal flow channel 105 is a circular channel, and the central axis of the compression spring 301 is coaxial with the central axis of the internal flow channel 105;
as shown in fig. 1-7, a guide assembly is movably disposed in the internal flow passage 105, the guide assembly is configured with a central through hole 305 for passing the puncture needle 203, the limiting member 304 is disposed on the guide assembly so as to move synchronously with the guide assembly, and as shown in fig. 1-7, the side wall of the catheter hub 101 is configured with a limiting hole 107 matched with the limiting member 304;
the hub 201 may preferably be made of plastic, and as shown in fig. 1-7, the hub 201 is configured with a boss 202 adapted to the guide assembly and adapted to be inserted into the internal flow passage 105, the boss 202 may preferably be of a cylindrical configuration, and the tail end of the puncture needle 203 is fixed to the boss 202; the side of the needle hub 201 may also be configured with an arrow for identification;
in this embodiment, when the limiting member 304 is clamped in the limiting hole 107, the compression spring 301 is in a compressed state to store elastic potential energy, and when the limiting member 304 is released from the limiting hole 107, the compression spring 301 drives the guiding assembly to move along the internal channel by a set distance by releasing the elastic potential energy, so as to drive the needle seat 201 arranged at one side of the guiding assembly to move by the set distance; specifically, in the present embodiment, by providing the compression spring 301, the guide assembly, and the limiting member 304 in the internal passage, the guide assembly may form a moving pair with the internal passage, and the guide assembly and the limiting member 304 may move together along the internal passage to change the state of the compression spring 301; the limiting hole 107 is formed in the side wall of the catheter seat 101, so that the limiting hole 107 can be matched with the limiting part 304, when the limiting part 304 is moved to a set position, the limiting part 304 can be clamped at the limiting hole 107, the compression spring 301 is kept in a compressed state so as to store elastic potential energy, after the limiting part 304 is released from the limiting hole 107, the compression spring 301 loses restraint, the guide assembly can be driven to move along the internal channel for a set distance by using the stored elastic potential energy, the needle seat 201 is synchronously driven to move in a direction away from a puncture point, the purpose of automatically rebounding the puncture needle 203 for the set distance is achieved, the needle point of the puncture needle 203 can be retracted to the set position in the indwelling catheter 102, and then the needle point exposed outside the indwelling catheter 102 is prevented from stabbing or puncturing a blood vessel in the subsequent needle inserting process.
As shown in fig. 1 to 7, in this embodiment, the indwelling needle further includes a hemostatic member 106 that can pass through the puncture needle 203, the hemostatic member 106 is disposed in the internal flow channel 105 and between the extension arm 103 and the compression spring 301, so as to prevent blood blockage; preferably, the hemostatic member 106 can be a rubber plug or a silicone plug, so that the puncture needle 203 can smoothly pass through the hemostatic member 106, on one hand, the purpose of blocking blood and restraining the puncture needle 203 and the needle seat 201 can be achieved, on the other hand, the rubber plug or the silicone plug has good elasticity and can generate elastic deformation, after the puncture needle 203 passes through the hemostatic member 106, the hemostatic member 106 has a certain pressure on the side wall of the puncture needle 203 due to the elastic deformation, so that blood can be better blocked, and after the puncture needle 203 exits from the hemostatic member 106, the hemostatic member 106 can automatically recover to the original state due to the elastic deformation, so that blood can be better blocked, and blood loss can be prevented.
The guide assembly has various embodiments, and preferably, the guide assembly may include a guide block 302 and a transmission block 303, wherein the guide block 302 may have a cylindrical structure so as to form a moving pair with the internal flow passage 105, the transmission block 303 is connected to the guide block 302 and is disposed at one side of the guide block 302, the central through hole 305 is respectively formed in the guide block 302 and the transmission block 303, and the inner diameter of the central through hole 305 is larger than the outer diameter of the puncture needle 203; so as to pass through the puncture needle 203;
as shown in fig. 2, 3 and 6, the transmission block 303 may be a cylindrical structure, and the outer diameter of the transmission block 303 is smaller than the inner diameter of the internal flow channel 105, so that a set gap is formed between the side wall of the transmission block 303 and the side wall of the internal flow channel 105, and one end of the limiting component 304 is fixed to the guide block 302 and may be located right between the side wall of the transmission block 303 and the side wall of the internal flow channel 105, as shown in fig. 3; in this embodiment, the guiding block 302 and the internal flow channel 105 form a moving pair so as to be able to move along the internal flow channel 105, the driving block 303 is used to contact the protruding portion 202 of the needle holder 201 so as to transmit power to the needle holder 201, the puncture needle 203 arranged on the needle holder 201 can pass through the guiding assembly through the central through hole 305, and one end of the limiting component 304 is fixed on the guiding block 302, so that the limiting component 304 is just positioned between the side wall of the driving block 303 and the side wall of the internal flow channel 105 after being released from the limiting hole 107, so that the limiting component 304 can move synchronously with the guiding assembly, and when moving to the position of the limiting hole 107, the limiting component 304 can just be smoothly clamped into the limiting hole 107 under the action of its own elasticity, thereby achieving the purpose of locking the compression spring 301.
Preferably, the guide block 302 and the transmission block 303 can be an integral structure; and may preferably be made of plastic in order to reduce costs.
Preferably, in this embodiment, the moving distance of the guide assembly driven by the compression spring 301 along the internal flow passage may be about 0.5cm, and preferably 3-5mm, and in order to further strictly limit the moving distance of the guide assembly, a limit stop may be further configured in the internal flow passage, the limit stop is configured at one side of the guide block 302, and the guide block 302 is located between the compression spring and the limit stop, so that after the limiting member 304 is released from the limiting hole 107, the distance traveled by the guide block 302 when the guide block 302 moves to contact the limit stop is exactly equal to the set distance, and the limit stop is used to limit the guide block 302 to continue moving, thereby achieving the purpose of strictly controlling the rebound distance.
Preferably, in this embodiment, the limiting hole 107 may be preferably configured as a square structure, as shown in fig. 1, the limiting member 304 may be an elastic card, which has certain elasticity and can be separated from the limiting hole 107 by elastic deformation under the squeezing action of an external force, and when moving to the position of the limiting hole 107, can also be extended under the action of its own elastic force and automatically snap into the limiting hole 107, so as to achieve the purpose of locking the compression spring 301.
It can be understood that the elastic card has various embodiments, as shown in fig. 3 and 4, preferably, one end of the elastic card is fixed to the guide assembly, the elastic card is configured with an arch portion 306 in a direction away from the guide assembly, as shown in fig. 4, and a bending portion 307 is configured at the other end of the elastic card, for example, in this embodiment, the bending portion 307 is a 90-degree bending structure; the arch portion 306 is used for automatically clamping into the limiting hole 107 under the action of self elasticity, as shown in fig. 4, the bending portion 307 just can be used for preventing the elastic card from being separated from the limiting hole 107 in the process of clamping into the limiting hole 107, and the purpose of limiting the other end of the elastic card is achieved, as shown in fig. 4, the arch portion 306 is constructed, and can be matched with the limiting hole 107 to lock the compression spring 301, and medical staff can conveniently release the elastic card from the limiting hole 107 in a pressing mode.
In a further embodiment, as shown in fig. 4, a side surface of the limiting hole 107 is configured with a locking groove 308, the locking groove 308 includes a limiting surface 309, the limiting surface 309 is an arc surface or a plane disposed obliquely, a side surface of the arch portion 306 is configured to be matched with the locking groove 308, especially to be matched with the limiting surface 309, and the limiting surface 309 is used for guiding the guiding assembly to move towards the compression spring 301, that is, guiding the guiding assembly to move along the direction of compressing the compression spring 301; it is understood that, in the present embodiment, the elastic clip may form a fit with the engaging groove 308, and particularly, may form a fit with the position-limiting surface 309, so that when the position-limiting component 304 is engaged in the position-limiting hole 107, due to the elastic force of the compression spring 301, the side surface of the arch 306 will be clamped into the slot 308, and will be matched with the limiting surface 309, because the limit surface 309 is obliquely arranged, the elastic card can not simply move towards the limit hole 107 under the action of external force, but the guide assembly is driven to move a certain distance towards the direction of the compression spring 301, so as to release the elastic card, and by adopting the design, the movement path of the elastic card can be effectively changed when the elastic card is released, and meanwhile, in the process, the force required when the elastic card is released can be effectively increased, so that the problem that the elastic card is easily and automatically released from the limiting hole 107 can be effectively solved.
Preferably, the internal flow passage 105 is configured with at least one step, for example, as shown in fig. 2, 6 and 7, the internal flow passage 105 is configured with a step, and one end of the compression spring 301 can be just mounted at the step, as shown in fig. 2, 6 and 7, so that the mounting and fixing problems of the compression spring 301 can be effectively solved.
For convenience of operation, as shown in fig. 1-7, a needle wing 204 for operation is disposed on a side surface of the needle base 201, and by disposing the needle wing 204, a medical worker can conveniently hold the needle base in the process of disposing an indwelling needle, thereby facilitating the medical worker to dispose the indwelling needle.
It should be noted that, by fixing one end of the compression spring 301 at the step and fixing the other end to the guiding component, the guiding component will not rotate in the internal flow channel 105, so that the position and motion path of the position-limiting component 304 fixed to the guiding component can be determined, and for the convenience of the medical staff to operate, the position-limiting hole 107 can be preferentially configured at an orientation 90 degrees to the extension arm 103, and the orientation of the position-limiting component 304 is matched with the position-limiting hole 107, so that the position-limiting hole 107 is located right on the motion path of the position-limiting component 304, for example, as shown in fig. 1-7, the position-limiting hole 107 is configured at the left side of the catheter seat 101, the position-limiting hole 107 is configured at the upper side of the catheter seat 101, and in actual use, the needle wing 204 can be located at the right side of the catheter seat 101, so that the medical staff can hold the extension arm 103 and the needle wing 204 separately with both hands to perform the setting operation of the indwelling needle, the medical staff can release the limiting component 304 by pressing the limiting component 304 from the upper part, so that the effect of automatically rebounding the puncture needle 203 for a set distance is achieved, and the operation is very convenient.
In a more perfect scheme, the infusion set further comprises an extension tube 104 and an infusion tee joint, one end of the extension tube 104 is fixed to the extension arm 103 and communicated with the extension arm 103, the infusion tee joint is provided with a heparin cap, and the other end of the extension tube 104 is connected with the infusion tee joint and communicated with the heparin cap so as to connect an infusion set through the heparin cap, and therefore an infusion channel can be conveniently and safely constructed.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention.
Claims (10)
1. An indwelling needle with an automatic rebounding function comprises a catheter seat, an indwelling catheter, a puncture needle and a needle seat, wherein an internal flow passage penetrating through two ends of the catheter seat is formed in the catheter seat, the indwelling catheter is arranged at the front end of the catheter seat and is communicated with the internal flow passage, an extension arm is formed on the side wall of the catheter seat and is communicated with the internal flow passage,
the puncture needle catheter also comprises a compression spring, a guide component and a limiting part, wherein the compression spring is arranged in the internal flow passage, one end of the compression spring is fixed on the catheter seat, the other end of the compression spring is connected with the guide component, the guide component is movably arranged in the internal flow passage and is provided with a central through hole for passing through the puncture needle, the limiting part is arranged on the guide component, the side wall of the catheter seat is provided with a limiting hole matched with the limiting part,
the needle seat is provided with a bulge which is matched with the guide component and is used for being inserted into the internal flow passage, the tail end of the puncture needle is fixed on the bulge,
when the limiting part is clamped in the limiting hole, the compression spring is in a compressed state, and when the limiting part is released from the limiting hole, the compression spring drives the guide assembly to move for a set distance along the internal channel.
2. The indwelling needle with automatic recoil according to claim 1, further comprising a hemostatic member that can be passed through the puncture needle, the hemostatic member being disposed within the internal flow passage and between the extension arm and the compression spring for preventing blood blockage.
3. The indwelling needle with automatic rebounding function according to claim 2, wherein the hemostatic component is a rubber plug or a silicone plug.
4. The indwelling needle with automatic recoil according to any one of claims 1 to 3, wherein the guide assembly comprises a guide block and a driving block, the guide block and the internal flow channel constitute a sliding pair, the driving block is connected with the guide block and is arranged at one side of the guide block, the central through holes are respectively formed in the guide block and the driving block, the inner diameter of the central through hole is larger than the outer diameter of the puncture needle,
the transmission block is of a cylindrical structure, and the outer diameter of the transmission block is smaller than the inner diameter of the inner flow passage;
one end of the limiting part is fixed on the guide block and is positioned between the side wall of the transmission block and the side wall of the internal flow passage.
5. The indwelling needle with automatic recoil according to claim 4, wherein the guide block and the transmission block are of an integral structure.
6. The indwelling needle with automatic rebounding function according to claim 4, wherein the stopper hole is configured in a square structure,
and/or the presence of a gas in the gas,
the limiting component is an elastic clamping piece.
7. The indwelling needle with automatic rebounding function according to claim 6, wherein one end of the elastic clamping piece is fixed to the guide component, and the elastic clamping piece is configured with an arch part in a direction away from the guide component, and a bending part is configured at the other end of the elastic clamping piece, the arch part is used for being clamped into the limiting hole, and the bending part is used for preventing the elastic clamping piece from being separated from the limiting hole.
8. The indwelling needle with automatic rebounding function according to claim 7, wherein the side of the limiting hole is configured with a slot, the slot comprises a limiting surface, the limiting surface is an arc surface or an obliquely arranged plane, the side of the arch is configured to be matched with the slot, and the limiting surface is used for guiding the guiding component to move towards the direction of the compression spring.
9. The automatically rebounding indwelling needle according to claim 4, wherein the internal flow passage is configured with at least one step.
10. The indwelling needle with automatic rebounding function according to claim 4, further comprising an extension tube, one end of which is fixed to the extension arm and is in communication with the extension arm;
and/or the presence of a gas in the gas,
the side of the needle seat is provided with a needle wing for operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022595015.0U CN213724111U (en) | 2020-11-11 | 2020-11-11 | Remaining needle with automatic resilience function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022595015.0U CN213724111U (en) | 2020-11-11 | 2020-11-11 | Remaining needle with automatic resilience function |
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| Publication Number | Publication Date |
|---|---|
| CN213724111U true CN213724111U (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022595015.0U Active CN213724111U (en) | 2020-11-11 | 2020-11-11 | Remaining needle with automatic resilience function |
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| CN (1) | CN213724111U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115382049A (en) * | 2022-08-22 | 2022-11-25 | 中国人民解放军联勤保障部队第九八一医院 | Trocar |
-
2020
- 2020-11-11 CN CN202022595015.0U patent/CN213724111U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115382049A (en) * | 2022-08-22 | 2022-11-25 | 中国人民解放军联勤保障部队第九八一医院 | Trocar |
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