CN211068315U

CN211068315U - Hemodialysis syringe needle

Info

Publication number: CN211068315U
Application number: CN201920996971.4U
Authority: CN
Inventors: 杨计忠; 甘玉芬; 黄玉情; 潘玉琼; 黄丹礼
Original assignee: Peoples Hospital of Baise
Current assignee: Peoples Hospital of Baise
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-07-24
Anticipated expiration: 2029-06-28

Abstract

A hemodialysis injection needle relates to the field of medical instruments and comprises a needle head, a first spring, a hose and a needle cylinder; the tail end of the needle head is connected with the hose, the needle head penetrates through the needle cylinder in a sliding mode, a sliding groove is formed in the wall of the needle cylinder and penetrates through the wall of the needle cylinder, a limiting portion is arranged outside the sliding groove, a pushing handle capable of being in sliding fit with the sliding groove is arranged on the outer wall of the tail end of the needle head, so that the needle head can be pushed out or retracted from the needle cylinder by applying external force on the pushing handle, a locking mechanism is arranged on the pushing handle and is matched with the limiting portion to lock the pushing handle so as to limit the movement of the pushing handle on the sliding groove, the needle head is fixed to slide relative to the needle cylinder, the first spring is located in the needle cylinder and is sleeved on the needle head, and. The utility model provides a hemodialysis syringe needle can contract back after pulling out the needle, avoids the exposed polluted environment of syringe needle, avoids causing the injury to the human body, and the material resources of using manpower sparingly simultaneously handle the syringe needle.

Description

Hemodialysis syringe needle

Technical Field

The utility model relates to the field of medical equipment, especially, relate to a hemodialysis syringe needle.

Background

After carrying out hemodialysis now, when medical personnel extracted the syringe needle, if the syringe needle of extracting can not in time be handled, expose outside, the easy polluted environment, and also cause the injury to medical personnel or patient very easily, present common practice is to wrap up with cotton cloth etc. with the syringe needle, or place in the special container, the former consumes manpower and time, and cause the wound to the human body easily in operation process, the latter is only a temporary processing, follow-up still need do further processing just can throw away, consequently also there is the condition of extravagant manpower and materials.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hemodialysis syringe needle, the syringe needle can contract after pulling out the needle, avoids the exposed polluted environment of syringe needle, avoids causing the injury to the human body, and the material resources of using manpower sparingly handle the syringe needle simultaneously.

A hemodialysis injection needle comprising a needle, a first spring, a hose, and a barrel, wherein: the needle head penetrates through the needle cylinder in a sliding manner and can move along the axis direction of the needle cylinder, one end of the hose extends into the needle cylinder and is communicated with the rear end of the needle head, a sliding groove communicated with an inner cavity of the needle cylinder is arranged on the wall of the needle cylinder, the sliding groove is arranged along the axis direction of the needle cylinder, a limiting part is arranged at the edge of the sliding groove, a push handle capable of being in sliding fit with the sliding groove is arranged on the outer wall of the tail end of the needle head, the push handle can drive the needle head to move relative to the needle cylinder along the sliding groove so that the needle head can be retracted into the needle cylinder or pushed out of the needle cylinder, a locking mechanism is arranged on the push handle and is matched with the limiting part to lock the push handle so as to limit the movement of the push handle on the sliding groove, so that the needle head and the needle cylinder are kept relatively fixed, and the first spring is positioned in the needle cylinder and sleeved on, and when the needle head is pushed out, the first spring has elastic potential energy, and under the action of the elastic potential energy of the first spring, the needle head can be driven to retract into the needle cylinder.

Furthermore, the limiting part comprises two lateral grooves, the two lateral grooves are arranged along the length direction of the sliding groove and are respectively positioned on two sides of the sliding groove, the two lateral grooves are fixedly connected with the outer wall of the needle cylinder, and the two lateral grooves face towards the inner wall surface of the outer wall of the needle cylinder and are respectively provided with a first limiting tooth clamped with the locking mechanism.

Furthermore, the locking mechanism comprises a second spring, a guide cylinder and second limiting teeth, the guide cylinder is slidably sleeved on the push handle, one end of the guide cylinder is located outside the limiting portion, the other end of the guide cylinder is located in the limiting portion, the second spring is arranged in the guide cylinder and sleeved on the push handle, one end of the second spring is connected with the inner wall of the guide cylinder, the other end of the second spring is connected with the outer wall of the push handle, so that the second spring has potential energy when the guide cylinder moves towards the needle head along the push handle, the second limiting teeth are symmetrically arranged on two sides of the guide cylinder and are located in the limiting portion, the second limiting teeth can be meshed with the first limiting teeth under the elastic force action of the second spring, and the locking mechanism is locked with the limiting portion.

Further, the needle cylinder still is connected with a fixed band, fixed band middle part position with the outer wall fixed connection of needle cylinder, and fixed connection be in the needle cylinder outer wall dorsad one side of spacing portion, the both ends of fixed band are pasted the cooperation through the magic and are connected.

Further, the outer wall of the needle cylinder is provided with transverse grains for increasing friction force.

Furthermore, the outer wall of the limiting part is provided with scales along the length direction of the sliding groove, and the push handle corresponds to the scales, so that the scales can display the moving distance of the push handle along the sliding groove.

Furthermore, one end of the guide tube, which is positioned outside the limiting part, is provided with a pressing part for driving the guide tube to move towards the needle head.

Further, the front end of cylinder is equipped with a preceding guiding hole, the inside of cylinder is equipped with a riser, be equipped with on the riser with preceding guiding hole relative interior guiding hole, the syringe needle wears to locate with sliding preceding guiding hole with on the interior guiding hole, just first spring is located preceding guiding hole with between the interior guiding hole.

Due to the adoption of the technical scheme, the utility model discloses following beneficial effect has:

1. the needle head can be pushed out of the needle cylinder, and after the locking mechanism is locked with the limiting part, the needle head is fixed relative to the needle cylinder and can be normally used for hemodialysis; after pulling out the needle, open locking mechanical system for push away the handle and can slide on spacing portion, and the syringe needle contracts in the cylinder under the elastic force effect of first spring, avoid the exposed polluted environment of syringe needle, also can avoid causing the injury to the human body simultaneously, safe and reliable, convenient operation has saved manpower and materials simultaneously and has handled the syringe needle, can directly abandon.

2. The stability that the motion process was pushed away to the side direction groove can be improved, and first spacing tooth is used for will pushing away the locking with locking mechanical system cooperation, simple structure.

3. The guide cylinder is pressed downwards, the second limiting tooth moves towards the needle head to be separated from the first limiting tooth, so that the push handle can slide on the limiting part, and the needle head can be pushed out of the needle cylinder or retracted into the needle cylinder; after the external force applied to the guide cap is removed, the guide cylinder enables the second limiting teeth to be meshed with the first limiting teeth under the action of the elastic force of the second spring, and the pushing handle is limited to move on the sliding groove, so that the needle head is fixed relative to the needle cylinder.

4. The fixing band is fixed this hemodialysis syringe needle and human arm, avoids the syringe needle not hard up in hemodialysis process.

5. The outer wall of the needle cylinder is provided with transverse grains which are beneficial to grasping the needle cylinder and pushing the push handle to push the needle head out of the needle cylinder.

6. The user can know the specific length of the needle head pushed out of the needle cylinder according to the displacement of the push handle relative to the scale, and the length of the needle head can be adjusted according to the specific needs of puncture.

7. The contact area of the guide tube and the human body is increased by the pressing part, and the guide tube is convenient to press, so that the guide tube can move towards the needle head along the pushing.

8. The needle head penetrates through the front guide hole and the inner guide hole in a sliding mode, and the stability of the needle head in the moving process can be improved.

Drawings

Fig. 1 is a schematic view of a hemodialysis injection needle of the present invention;

fig. 2 is a sectional view of the hemodialysis injection needle of the present invention without a fixing band;

FIG. 3 is an enlarged view of FIG. 2A;

FIG. 4 is a cutaway schematic view of the syringe;

fig. 5 is a schematic structural view of the guide cylinder, the second limit tooth and the pressing part.

In the figure, 1-needle head, 11-pushing handle, 12-second spring, 13-guide tube, 131-pressing part, 14-second limiting tooth, 2-needle tube, 21-sliding groove, 22-limiting part, 23-first limiting tooth, 25-front guide hole, 26-inner guide hole, 27-fixing band, 3-hose and 4-first spring.

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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 5, a preferred embodiment of the present invention provides a hemodialysis injection needle, which includes a needle head 1, a first spring 4, a flexible tube 3 and a syringe 2.

The wall of the needle cylinder 2 is provided with a movable groove 21 communicated with the inner cavity of the needle cylinder, the sliding groove 21 is arranged along the axial direction of the needle cylinder 2, and the edge of the sliding groove 21 is provided with a limiting part 22.

Preferably, the limiting part 22 includes two lateral grooves in an inverted L shape, the two lateral grooves are disposed oppositely, the two lateral grooves are respectively located at two sides of the sliding groove 21, and both the two lateral grooves are disposed along the length direction of the sliding groove 21, the lower ends of both the two lateral grooves are fixedly connected with the outer wall of the needle cylinder 2, the inner wall surfaces of both the two lateral grooves facing the outer wall of the needle cylinder 2 are both provided with first limiting teeth 23, and the first limiting teeth 23 are linear racks.

The needle head 1 is slidably arranged in the needle cylinder 2 in a penetrating manner and can move along the axis direction of the needle cylinder 2, one end of the hose 3 extends into the needle cylinder 2 and is communicated with the rear end of the needle head 1, a push handle 11 which is slidably matched with the sliding groove 21 is arranged on the outer wall of the tail end of the needle head 1, the push handle 11 can drive the needle head 1 to move relative to the needle cylinder 2 by moving along the sliding groove 21, so that the needle head 1 is contracted into the needle cylinder 2 or pushed out from the needle cylinder 2, and a locking mechanism which is matched with the limiting part 22 is arranged on the push handle 11 to lock the push handle 11 so as to limit the movement of the push handle 11 on the sliding groove 21, so that the needle head 1 is kept fixed relative to the needle cylinder 2. The pushing handle 11 is cylindrical, one end of the pushing handle is fixedly connected with the outer wall of the needle head 1, the other end of the pushing handle extends to the outside of the limiting part 22, and the end is the outer end. The first spring 4 is located in the needle cylinder 2 and sleeved on the needle head 1, one end of the first spring is fixedly connected with the outer wall of the needle head 1, and the other end of the first spring is fixedly connected with the inside of the needle cylinder 2, so that when the needle head 1 is pushed out, the first spring 4 deforms to have elastic potential energy, and under the action of the elastic potential energy of the first spring 4, the needle head 1 can be driven to retract into the needle cylinder 2.

Preferably, the front end of the barrel 2, i.e. the end towards which the needle 1 faces, is provided with a front guide hole 25. The needle cylinder 2 is internally provided with a vertical plate which is positioned behind the first spring 4, the vertical plate is provided with an inner guide hole 26 opposite to the front guide hole 25, the needle head 1 passes through the front guide hole 25 and the inner guide hole 26 in a sliding way, and the first spring 4 is positioned between the front guide hole 25 and the inner guide hole 26. The front guide hole 25 and the inner guide hole 26 can increase stability during sliding of the needle 1.

Preferably, the locking mechanism comprises a second spring 12, a guide cylinder 13 and a second limit tooth 14. The guide tube 13 is slidably sleeved on the push handle 11 and penetrates through the limiting portion 22, the length direction of the guide tube is perpendicular to the length direction of the limiting portion 22, one end of the guide tube 13 is located outside the limiting portion 22, and the other end of the guide tube is located in the limiting portion 22. The second spring 12 is installed in the guide sleeve 13 and sleeved on the push handle 11, one end of the second spring 12 is fixedly connected with the outer wall of the push handle 11, and the other end is fixedly connected with the inner wall of the guide sleeve 13, so that when the guide sleeve 13 is pressed to move towards the needle 1 along the push handle 11, the second spring 12 is compressed to have potential energy. The second limiting teeth 14 are symmetrically arranged on two sides of the guide barrel 13 and are positioned in the limiting part 22, the second limiting teeth 14 are fixedly connected with the outer wall of the guide barrel 13, the second limiting teeth 14 are meshed with the first limiting teeth 23 under the action of the elastic force of the second spring 12, the push handle 11 is locked with the limiting part 22, so that the movement of the push handle 11 on the sliding groove 21 is limited, the sliding of the needle head 1 relative to the needle barrel 2 is further limited, and the state is the locking state of the locking mechanism; when an external force is applied to the guide sleeve 13 from one end outside the limiting part 22 to the other end, so that the guide sleeve 13 moves towards the needle 1, the second limiting tooth 14 is separated from the first limiting tooth 23, so that the push handle 11 can slide on the limiting part 22, and the needle 1 can slide relative to the needle cylinder 2, which is an unlocking state of the locking mechanism.

Preferably, one end of the guide tube 13, which is located outside the limiting portion 22, is provided with a pressing portion 131 for driving the guide tube 13 to move towards the needle 1, which can increase the contact area of the human body and facilitate pressing.

Preferably, the outer wall of the position-limiting part 22 is provided with a scale (not marked in the figure) along the length direction of the sliding groove 21, and the push handle corresponds to the scale, so that the scale can display the moving distance of the push handle along the sliding groove 21, and the length of the needle 1 pushed out of the needle cylinder 2 can be accurately adjusted according to needs.

Preferably, the syringe 2 is further connected with a fixing band 27, the middle position of the fixing band 27 is fixedly connected with the outer wall of the syringe 2, and the fixing band is fixedly connected to one side of the outer wall of the syringe 2, which faces away from the limiting part 22. The two ends of the fixing band 27 are connected in a matched manner through a magic tape. The fixing band 27 can fix the syringe 2 on the arm of the patient, and prevent the needle 1 from moving during the hemodialysis.

Preferably, the outer wall of the needle cylinder 2 is provided with transverse threads for increasing friction force, so that the friction force between fingers and the needle cylinder 2 is increased, the needle cylinder 2 is better grasped, and external force is applied to the push handle 11 to push the needle head 1 out of the needle cylinder 2.

The utility model discloses a theory of operation:

before use, the needle 1 is hidden in the needle cylinder 2, the push handle 11 is positioned at the tail end of the limiting part 22, namely the end far away from the needle 1, and the locking mechanism is in a locking state; when the locking mechanism needs to be changed from the locking state to the unlocking state, the thumb is inclined to exert an inclined force on the pressing part 131, the inclined force has two components, namely a forward pushing force and a pressure towards the needle head 1 along the pushing handle 11, and the inclined force presses the guide barrel 13 to move towards the needle head 1, so that the second limit tooth 14 is separated from the first limit tooth 23, and the locking mechanism is unlocked; the former can make the pushing handle 11 slide forward to push the needle 1 out of the needle cylinder 2; when the length of the needle 1 pushed out from the syringe 2 is enough, the force applied on the pressing part 131 is removed, and at the same time, the outer end of the push handle 11 is pressed to be unable to retract, the second spring 12 of the guide tube 13 moves in the direction back to the needle 1 under the action of the elastic force, the second limit tooth 14 is engaged with the first limit tooth 23, the locking mechanism enters the locking state from the unlocking state, and the needle 1 is fixed relative to the syringe 2, so that the needle can be used normally.

After the needle is pulled out, a force is applied to the pressing part 131 to enable the guide tube 13 to move towards the needle head 1, the locking mechanism is changed from a locking state to an unlocking state, the needle head 1 automatically retracts under the action of the elastic force of the first spring 4 and is hidden in the needle cylinder 2, the situation that the needle head is exposed outside to pollute the environment is avoided, and the injury to medical staff or patients is avoided.

The above description is for the detailed description of the preferred possible embodiments of the present invention, but the embodiments are not intended to limit the scope of the present invention, and all equivalent changes or modifications accomplished under the technical spirit suggested by the present invention should fall within the scope of the present invention.

Claims

1. The utility model provides a hemodialysis syringe needle, includes syringe needle, first spring, hose and cylinder, its characterized in that: the needle head penetrates through the needle cylinder in a sliding manner and can move along the axis direction of the needle cylinder, one end of the hose extends into the needle cylinder and is communicated with the rear end of the needle head, a sliding groove communicated with an inner cavity of the needle cylinder is arranged on the wall of the needle cylinder, the sliding groove is arranged along the axis direction of the needle cylinder, a limiting part is arranged at the edge of the sliding groove, a push handle capable of being in sliding fit with the sliding groove is arranged on the outer wall of the tail end of the needle head, the push handle can drive the needle head to move relative to the needle cylinder along the sliding groove so that the needle head can be retracted into the needle cylinder or pushed out of the needle cylinder, a locking mechanism is arranged on the push handle and is matched with the limiting part to lock the push handle so as to limit the movement of the push handle on the sliding groove, so that the needle head and the needle cylinder are kept relatively fixed, and the first spring is positioned in the needle cylinder and sleeved on, and when the needle head is pushed out, the first spring has elastic potential energy, and under the action of the elastic potential energy of the first spring, the needle head can be driven to retract into the needle cylinder.

2. A hemodialysis needle according to claim 1, wherein: the limiting part comprises two lateral grooves, the two lateral grooves are arranged along the length direction of the sliding groove and are respectively positioned on two sides of the sliding groove, the two lateral grooves are fixedly connected with the outer wall of the needle cylinder, and the two lateral grooves face towards the inner wall surface of the outer wall of the needle cylinder and are respectively provided with a first limiting tooth connected with the locking mechanism in a clamped mode.

3. A hemodialysis needle according to claim 2, wherein: the locking mechanism comprises a second spring, a guide cylinder and second limiting teeth, the guide cylinder is slidably sleeved on the push handle, one end of the guide cylinder is located outside the limiting portion, the other end of the guide cylinder is located in the limiting portion, the second spring is installed in the guide cylinder and sleeved on the push handle, one end of the guide cylinder is connected with the inner wall of the guide cylinder, the other end of the guide cylinder is connected with the outer wall of the push handle, so that the second spring has potential energy when the guide cylinder moves towards the needle head along the push handle, the second limiting teeth are symmetrically arranged on two sides of the guide cylinder and located in the limiting portion, the second limiting teeth are enabled to be meshed with the first limiting teeth under the elastic action of the second spring, and therefore the locking mechanism is locked with the limiting portion.

4. A hemodialysis needle according to claim 1, wherein: the needle cylinder is further connected with a fixing band, the middle position of the fixing band is fixedly connected with the outer wall of the needle cylinder, the fixing band is fixedly connected to one side, back to the limiting portion, of the outer wall of the needle cylinder, and the two ends of the fixing band are connected in a matched mode through magic tapes.

5. A hemodialysis needle according to claim 1, wherein: the outer wall of the needle cylinder is provided with transverse grains for increasing friction force.

6. A hemodialysis needle according to claim 1, wherein: the outer wall of the limiting portion is provided with scales along the length direction of the sliding groove, the push handle corresponds to the scales, and therefore the scales can display the moving distance of the push handle along the sliding groove.

7. A hemodialysis needle according to claim 3, wherein: one end of the guide tube, which is positioned outside the limiting part, is provided with a pressing part for driving the guide tube to move towards the needle head.

8. A hemodialysis needle according to claim 1, wherein: the front end of cylinder is equipped with a preceding guiding hole, the inside of cylinder is equipped with a riser, be equipped with on the riser with preceding guiding hole relative interior guiding hole, the syringe needle wears to locate with sliding preceding guiding hole with on the interior guiding hole, just first spring is located preceding guiding hole with between the interior guiding hole.