CN107929884B

CN107929884B - Safety syringe needle

Info

Publication number: CN107929884B
Application number: CN201711157847.0A
Authority: CN
Inventors: 覃俊妮; 席祖洋; 赵荣; 谭坤; 陈万平
Original assignee: Central People's Hospital Of Yichang City
Current assignee: Central People's Hospital Of Yichang City
Priority date: 2017-11-20
Filing date: 2017-11-20
Publication date: 2020-09-01
Anticipated expiration: 2037-11-20
Also published as: CN107929884A

Abstract

The invention provides a safe injection needle, which comprises a connecting pipe and a needle head, wherein the connecting pipe is fixedly connected with the needle head, a protective sleeve is sleeved on the connecting pipe and the needle head in a sliding manner, a sliding groove which penetrates through the side wall and is arranged along the axial direction of the protective sleeve is arranged on the protective sleeve, and a handle penetrates through the sliding groove and is connected with the connecting pipe. The two ends of the sliding groove are provided with a rear blocking part and a front blocking part. The protective sleeve slides to one extreme position to completely cover the needle, and to the other extreme position to completely expose the needle. Through adopting above structure, can conveniently slide protective sleeve and wrap the syringe needle completely after the injection is accomplished, avoid sharp weapon to hurt the user. The safe injection needle structure provided by the invention is small in size, and cannot influence the injection angle. The operation is also more convenient.

Description

Safety syringe needle

Technical Field

The invention relates to the field of injection instruments of medical instruments, in particular to a safe injection needle.

Background

A large number of needles are used daily in hospitals and are constructed as shown in fig. 9, and during an injection, a medical staff member needs to remove the cannula, and after the injection is completed, for example, after the infusion is completed, the medical staff member has difficulty in safely putting the cannula back on the needle. There is a problem in that medical staff or subsequent recycling personnel are easily scratched or punctured by the needle, and the risk of infection is higher by needle injury due to the presence of viruses or bacteria than by ordinary sharps injury.

Chinese patent document CN 104274190B describes a safety blood taking needle, which comprises a needle seat, a needle sleeve, a hose, a straight needle handle and a needle head, wherein the needle sleeve is sleeved on the needle head, two ends of the hose are respectively communicated with the straight needle and the needle seat, the straight needle handle is arranged at the joint of the straight needle and the hose, the safety blood taking needle also comprises a protective cover, a sliding piece, a handle and a limiting mechanism, the needle seat is cylindrical, one end of the needle seat is fixed and communicated with the needle head, and the other end of the needle seat is connected with the hose; the slider is cylindrical with two open ends and movably sleeved on the needle seat, and the length of the slider in the moving direction is greater than that of the needle head; the axial length of the needle seat is greater than that of the needle head; the limiting mechanism is arranged on the sliding piece and the needle seat; the handle is fixed with the needle seat and abuts against the sliding piece; the protective cover is covered outside the straight needle and is fixed with the straight needle handle in a spiral way. The safety of the needle treatment after blood collection is greatly improved by arranging the sliding piece to slide on the needle base to shield the needle; because the use of the spring type needle is avoided, the pain of the patient is reduced. It is also indicated in the patent document that there is a needle of spring construction in the prior art. However, this safety lancet has a problem that it is bulky and thick in diameter, and particularly, the diameter of the sheath 3 is large, so that the angle of the needle penetrating the skin is limited when it is used, which makes the operation difficult. Moreover, when the diameter becomes larger, the puncturing operation of the medical staff becomes inflexible. Further, the needle is cumbersome to hold and slippery in the hand. The structure of the needle head is very complex, and the needle head can be produced by a very complex mould, so that the cost of the needle head is greatly increased, and the economic burden of a patient is increased.

Disclosure of Invention

The invention aims to solve the technical problem of providing a safe injection needle structure which can conveniently and completely cover a needle head after injection is finished, so that the injury of a sharp tool is avoided; the volume is small, and the injection angle cannot be influenced; the operation is convenient, in the preferred scheme, the processing and the production are convenient, the defense effect to the syringe needle is better, the syringe needle can be completely locked after being coated, and the syringe needle is not easy to fall off.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a safe syringe needle, includes connecting pipe and syringe needle, connecting pipe and syringe needle fixed connection, and protective case cup joints on connecting pipe and syringe needle slidable, is equipped with the spout that link up the lateral wall and arrange along the protective case axial on the protective case, and the handle passes the spout and is connected with the connecting pipe.

In a preferred scheme, a rear blocking part and a front blocking part are arranged at two ends of the sliding chute, the rear blocking part and the front blocking part are of a continuous structure along the direction of the sliding chute, and the rear blocking part and the front blocking part are used for limiting the sliding limit position of the protective sleeve.

In a preferred embodiment, the protective sleeve is slid to one extreme position to fully enclose the needle and to another extreme position to fully expose the needle.

In a preferred scheme, the handle is bonded or welded with the connecting pipe.

In the preferred scheme, the protective sleeve is provided with a jaw, the connecting pipe is provided with a limiting groove, the jaw is locked away from the surface of the connecting pipe in an initial state, when the position of the protective sleeve needs to be limited, the jaw is unlocked, when the protective sleeve slides to completely wrap the needle head, the free end of the jaw is positioned in the limiting groove, and the axial movement of the protective sleeve is locked.

In a preferable scheme, the handle is provided with a clamping part, the clamping part is connected with the holding part, the cross section of the clamping part is of a U-shaped structure with an opening at the top, and the U-shaped structure is sleeved on the connecting pipe.

In a preferred scheme, the sliding groove is provided with an installation part, the opening width of the installation part of the sliding groove is larger than the opening widths of other parts of the sliding groove, and the installation part is used for the clamping part to penetrate through.

In a preferred scheme, the opening width of the U-shaped structure is smaller than the diameter of the connecting pipe.

In the preferred scheme, the protective sleeve is provided with a clamping jaw, the connecting pipe is provided with a limiting groove, the inner wall of the clamping part is provided with a limiting block located in the limiting groove, the limiting groove is internally provided with filler, the clamping jaw is blocked by the filler and cannot fall into the limiting groove in an initial state, when the locking is needed, the connecting pipe is rotated, the limiting block clears the filler, the protective sleeve slides to cover the needle completely, the free end of the clamping jaw is located in the limiting groove, and the axial movement of the protective sleeve is locked.

In a preferred scheme, a flexible plug is arranged at the end head of the protective sleeve, the protective sleeve slides to completely cover the needle head, and the needle point of the needle head is positioned in the flexible plug.

By adopting the structure, the safe injection needle provided by the invention can be used for conveniently sliding the protective sleeve to completely cover the needle after injection is finished, so that a user is prevented from being injured by sharp tools. The safe injection needle structure provided by the invention is small in size, and cannot influence the injection angle. The operation is also more convenient. In a preferable scheme, the safe injection needle is convenient to process and produce, the arranged flexible plug has a better defense effect on the needle, and the protective sleeve can be completely locked after the needle is coated, so that the safe injection needle is not easy to fall off.

Drawings

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

fig. 1 is a schematic front view of the initial state of the present invention.

Fig. 2 is a front view of the injection state of the present invention.

Fig. 3 is a front view of the injection-holding structure of the present invention.

Fig. 4 is a schematic front view of the needle covering device after the injection of the present invention.

Fig. 5 is a schematic sectional view a-a of fig. 4.

FIG. 6 is a schematic view of the structure of the present invention when the filling material is removed.

Fig. 7 is a front view of the needle covering and locking device of the present invention.

Fig. 8 is a partially enlarged schematic view at C in fig. 7.

Fig. 9 is a schematic front view of a prior art structure.

In the figure: the flexible plug comprises a protective sleeve 1, a flexible plug 11, a sliding groove 12, a rear blocking part 13, a front blocking part 14, an installation part 15, a clamping jaw 16, a connecting pipe 2, a limiting groove 21, a needle 3, a handle 4, a holding part 41, a clamping part 42, a limiting block 43, a hose 5 and filler 6, wherein the opening width b of the U-shaped structure is larger than the width of the U-shaped structure.

Detailed Description

Example 1:

as in fig. 1-4, 7, a safe syringe needle, including connecting pipe 2 and syringe needle 3, the one end and the syringe needle 3 fixed connection of connecting pipe 2, the other end and the hose 5 of connecting pipe 2 are connected, protective case 1 cup joints on connecting pipe 2 and syringe needle 3 slidable, protective case 1 is a cylindric sleeve pipe, both ends link up, be equipped with the spout 12 that link up the lateral wall and arrange along protective case 1 axial on protective case 1, handle 4 passes spout 12 and is connected with connecting pipe 2. The injection state and the protection state of the needle head are switched by sliding the protective sleeve 1, so that the sharp injury to people is avoided.

Preferably, as shown in fig. 2, a rear stopper 13 and a front stopper 14 are provided at both ends of the slide groove 12. With this structure, the limit position at which the protection sleeve 1 slides is restricted by the back catch 13 and the front catch 14. In a more preferred embodiment, at least the inner wall of the back stop portion 13 is provided with a diameter-reduced structure so as to substantially fit the outer wall of the connection pipe 2, so that the protection pipe 1 does not shake during sliding.

In a preferred embodiment, the protective sleeve 1 is slid to one extreme position to fully enclose the needle 3 and to the other extreme position to fully expose the needle 3.

In an alternative, the handle 4 is bonded or welded to the connecting tube 2, which is not shown in the figure.

In a preferred embodiment, as shown in fig. 8, the protective sleeve 1 is provided with a claw 16, the connecting tube 2 is provided with a limiting groove 21, the claw 16 is locked away from the surface of the connecting tube 2 in an initial state, when the position of the protective sleeve 1 needs to be limited, the claw 16 is unlocked, when the protective sleeve 1 slides to completely cover the needle 3, the free end of the claw 16 is located in the limiting groove 21, and the axial movement of the protective sleeve 1 is locked. The locking mode of the claw 16 is adhesive tape locking or rope loop locking, namely a rope loop sequentially rounds the outer wall of the protective sleeve 1 and the bottom of the claw 16, so that the claw 16 cannot fall down, when the locking is needed, the rope loop is pulled, the claw 16 falls down, and enters the limiting groove 21 to lock the axial movement of the protective sleeve 1. The safe syringe needle of this structure links together syringe needle 3, connecting pipe 2, hose 5 and hose nipple earlier when producing, and the handle is not installed earlier, and protective case 1 injection moulding installs the becket bridle and taut messenger jack catch 16 breaks away from the outer wall of connecting pipe 2, sheathes in protective case 1 after, and the handle penetrates from spout 12, utilizes welding equipment to make handle and connecting pipe 2 welding or bonding connection, accomplishes the installation promptly. During the use, slide protective sleeve 1 open, then inject, after accomplishing, tear the becket that is equipped with the fracture, jack catch 16 falls, to the syringe needle direction slip protective sleeve 1, jack catch 16 end enters into spacing inslot 21 then with protective sleeve 1's axial displacement locking. It should be noted that to ensure the locking effect, the locking of the pawl 16 is unidirectional, and the locking in the other direction is mainly performed by the backstop 13.

Example 2:

the structure of embodiment 1 is more compact, convenient to use, but the degree of difficulty requirement to the handle is higher, and the requirement to equipment is also higher relatively. On the basis of embodiment 1, a handle mounting structure in a preferred scheme is as shown in fig. 1 to 8, a clamping portion 42 is arranged on the handle 4, the clamping portion 42 is connected with a holding portion 41, the cross section of the clamping portion 42 is a U-shaped structure with an open top, and the U-shaped structure is sleeved on the connecting pipe 2. And a clamping structure is adopted, so that the welding process is avoided, and the installation difficulty is reduced.

Preferably, as shown in fig. 2, the slide groove 12 is provided with a mounting portion 15, the mounting portion 15 of the slide groove 12 has an opening width larger than the opening width of the other portions of the slide groove 12, and the mounting portion 15 is used for the clamping portion 42 to pass through. With the structure, the installation is convenient, the overall strength of the protective sleeve 1 cannot be reduced, and the sliding of the protective sleeve 1 is smooth.

Preferably, as shown in fig. 5, the opening width b of the "U" shaped structure is smaller than the diameter of the connecting pipe 2. With the structure, the clamping is convenient and firm.

The preferred scheme is as in fig. 1-8, the protective sleeve 1 is provided with a claw 16, the connecting pipe 2 is provided with a limiting groove 21, the inner wall of the clamping part 42 is provided with a limiting block 43 positioned in the limiting groove 21, and the limiting groove 21 and the limiting block 43 are arranged to help to limit the axial position of the handle 4.

The limit groove 21 is internally provided with a filling material 6, and the filling material 6 is made of plastic and comprises flexible PE, PP, PVC, PS, ABS, PC, polyurethane, polyamide, thermoplastic elastomer, rubber, silica gel or a blend of the materials. In the initial state, the claw 16 is blocked by the filling material 6 and can not fall into the limiting groove 21, when locking is needed, the connecting pipe 2 is rotated, the limiting block 43 in the limiting groove 21 clears the filling material 6, the protective sleeve 1 slides to completely cover the needle head 3, the free end of the claw 16 falls into the limiting groove 21, and the axial movement of the protective sleeve 1 is locked. The installation of this structure is simpler than that in embodiment 1. The requirements on production enterprises and equipment are not high. During production, the connecting pipe 2 is injected twice, the first time does not contain the filling material 6, and the second time is injected with the filling material 6. During the installation, link together syringe needle 3, connecting pipe 2, hose 5 and hose nipple earlier, the handle is not installed earlier, and protective case 1 injection moulding cup joints on connecting pipe 2, and handle 4 penetrates from installation department 15 to be connected with connecting pipe 2, has accomplished the installation promptly. When in use, the protective sleeve 1 is pushed away backwards, in the pushing away process, due to the existence of the filling material 6, the claw 16 cannot fall into the limiting groove 21 to expose the needle head 3, the medical personnel performs injection as shown in figure 3, after the injection is completed, the protective sleeve 1 is pushed a distance towards the needle head, then the handle is held, the connecting pipe 2 is rotated, the limiting block 43 of the clamping part 42 cleans the filling material 6,

in a preferred scheme, a flexible plug 11 is arranged at the end of the protective sleeve 1, the protective sleeve 1 slides to completely cover the needle 3, and the needle point of the needle 3 is located in the flexible plug 11. The end of the claw 16 enters the limiting groove 21 to lock the axial movement of the protective sleeve 1. The locking of the catch 16 is unidirectional and the locking in the other direction is mainly accomplished by the backstop 13.

Example 3:

on the basis of the embodiments 1 and 2, a preferable scheme is as shown in fig. 1 and 7, a flexible plug 11 is arranged at the end of the protective sleeve 1, the protective sleeve 1 slides to completely cover the needle 3, and the needle point of the needle 3 is positioned in the flexible plug 11. The material of flexible end cap 11 adopts medical silica gel, and the flexible end cap 11 of setting can also avoid protective case 1 to rock at the slip in-process.

The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.

Claims

1. The utility model provides a safe syringe needle, includes connecting pipe (2) and syringe needle (3), connecting pipe (2) and syringe needle (3) fixed connection, characterized by: the protective sleeve (1) is slidably sleeved on the connecting pipe (2) and the needle head (3), a sliding groove (12) which penetrates through the side wall and is axially arranged along the protective sleeve (1) is formed in the protective sleeve (1), a rear blocking part (13) and a front blocking part (14) are arranged at two ends of the sliding groove (12), the rear blocking part (13) and the front blocking part (14) are of a continuous structure along the direction of the sliding groove (12), and the rear blocking part (13) and the front blocking part (14) are used for limiting the sliding limit position of the protective sleeve (1);

when the protective sleeve (1) slides to one limit position, the needle head (3) is completely covered in the protective sleeve, and when the protective sleeve slides to the other limit position, the needle head (3) is completely exposed outside;

the handle (4) passes through the chute (12) and is connected with the connecting pipe (2);

the handle (4) is provided with a clamping part (42), the clamping part (42) is connected with the holding part (41), the cross section of the clamping part (42) is of a U-shaped structure with an opening at the top, and the U-shaped structure is sleeved on the connecting pipe (2);

the sliding chute (12) is provided with an installation part (15), the opening width of the installation part (15) of the sliding chute (12) is larger than the opening width of other parts of the sliding chute (12), and the installation part (15) is used for the clamping part (42) to pass through;

the width (b) of the opening of the U-shaped structure is smaller than the diameter of the connecting pipe (2);

the protective sleeve (1) is provided with a clamping jaw (16), the connecting pipe (2) is provided with a limiting groove (21), the inner wall of the clamping part (42) is provided with a limiting block (43) positioned in the limiting groove (21), the limiting groove (21) is internally provided with filling material (6), the clamping jaw (16) is blocked by the filling material (6) and cannot fall into the limiting groove (21) in an initial state, when the locking is required, the connecting pipe (2) is rotated, the filling material (6) is cleared by the limiting block (43), the protective sleeve (1) slides to completely cover the needle head (3), the free end of the clamping jaw (16) is positioned in the limiting groove (21), and the axial movement of the protective sleeve (1) is locked;

the end of the protective sleeve (1) is provided with a flexible plug (11), the protective sleeve (1) slides to completely cover the needle head (3), and the needle point of the needle head (3) is positioned in the flexible plug (11).

2. A safety needle as recited in claim 1, wherein: the handle (4) is bonded or welded with the connecting pipe (2).