CN113855927A

CN113855927A - Integral protection type cylinder

Info

Publication number: CN113855927A
Application number: CN202111169505.7A
Authority: CN
Inventors: 不公告发明人
Original assignee: Shanghai Beileifu Technology Co ltd
Current assignee: Shanghai Beileifu Technology Co ltd
Priority date: 2021-10-08
Filing date: 2021-10-08
Publication date: 2021-12-31

Abstract

The invention belongs to the technical field of medical appliances, and particularly relates to an integral protective syringe. The invention achieves the purpose of safe, efficient and convenient use of the syringe by arranging the needle mounting tube, the injection needle, the clamping cylinder unit, the rotary protection tube unit and the sealing barrel unit on the syringe main body. The invention has the following advantages: firstly, when the injection needle is closed, the closed protection structure is not easy to open accidentally; secondly, when the injection is used, the injection needle can be exposed and opened only by two steps of operation, so that the injection operation is more convenient and quicker; thirdly, no useless parts are generated in the whole injection process, the injection needle can still obtain the same strength of sealing protection effect after the injection is finished, and the subsequent waste treatment is more efficient and safer; fourthly, the required force of the rotary opening and closing operation of the needle cylinder is moderate, the connection between the structures of the needle cylinder is stable, and the collocation is reasonable.

Description

Integral protection type cylinder

Technical Field

The invention belongs to the technical field of medical appliances, and particularly relates to an integral protective syringe.

Background

An injector, generally referred to as a drug delivery device, is generally constructed to include a barrel, a plunger, and a needle cannula, and is generally used in the manner of: the push rod is initially positioned at the inner side end of the syringe, the needle tube is firstly taken down at the moment, then the push rod is pulled outwards, so that the syringe is filled with the medicine, then the push rod is pushed inwards, the medicine input operation can be completed, and finally the needle tube is sleeved on the syringe again for subsequent proper treatment.

The syringe with the structure has relatively simple composition and relatively traditional use method, so that a plurality of problems exist, such as: 1. the injection needle on the syringe is protected by only one thin and soft plastic tube, the strength of the injection needle is obviously insufficient, the accidental problem that the injection needle punctures the needle tube is likely to occur, and if the problem occurs, the whole syringe can not be used; 2. the problem that the needle tube falls off easily occurs before and after the syringe is used, which is very dangerous, and the syringe cannot be used after falling off before use; 3. after the syringe is used, if the needle tube is lost, the needle of the syringe is directly exposed in the whole operation process of waste disposal, and special needle destruction disposal is needed subsequently, which wastes time and labor.

Therefore, there is a need for a new syringe structure with high protection strength for injection needle, easy and convenient injection operation, and easy re-sealing after injection.

Chinese patent publication No. CN 108112236a, publication No. 2018.06.01, discloses a safety device for preventing needle stick injury, the safety device comprising: a protective cover; and a shield pivotable from a storage position in which it interlocks with the protective cover, a retracted position in which it allows access to the needle, and a safety position in which it covers the needle, wherein the camming surface of the shield and the engagement peg of the protective cover are arranged such that when the safety device is mounted around the tip of the medical device, the shield is displaced from the storage position to the retracted position by distal movement removing the protective cover from the tip.

However, the needle safety device of the patent of the invention has at least the following problems: firstly, the needle protection structure comprises too many tiny components, such as a protective cover, a shielding part and a sealing cover, and the operation of opening the needle is very complicated; secondly, after the injection device is used, the injection needle is only protected by the shielding piece, the protection effect is not all-around closed, and small parts such as a protective cover and a sealing cover can be added, so that the whole injection operation is not ordered and efficient.

Disclosure of Invention

The invention provides an integral protective syringe which can achieve the purposes of safe, efficient and convenient use of the syringe by arranging a needle mounting tube, an injection needle, a clamping cylinder unit, a rotary protection tube unit and a sealing barrel unit on a syringe main body.

The technical scheme adopted by the invention for solving the problems is as follows: the utility model provides an integral protection type cylinder, includes the cylinder main part, needle installation pipe to and the syringe needle, still including setting up cylinder unit is used in the block on the needle installation pipe, the cover is in on needle installation pipe and the syringe needle and with the rotatory protection tube unit that cylinder unit cup jointed is used to the block, and sets up in the rotatory protection tube unit and be used for the cover before the rotatory rotation of rotatory protection tube unit sealed section of thick bamboo unit on the syringe needle.

The further preferred technical scheme is as follows: the clamping cylinder unit comprises a fixing column arranged on the needle mounting pipe and a protruding block arranged on the annular surface of the fixing column and used for clamping the rotary protection pipe unit.

The further preferred technical scheme is as follows: the rotary protection tube unit comprises a circular tube main body, a rotary hole, an inner hole and a slot, wherein the rotary hole is arranged at one end, close to the needle cylinder main body, of the circular tube main body, is used for inserting and installing the fixing column, the inner block is arranged in the rotary hole and used for clamping the protruding block, and the slot is arranged on the circular tube main body and used for outwards rotating and moving out the needle installation tube and the injection needle.

The further preferred technical scheme is as follows: the sealing barrel unit comprises a needle head sealing barrel body which is arranged in the circular tube main body and covers the injection needle.

The further preferred technical scheme is as follows: the clamping cylinder unit also comprises a protruding plate arranged on the fixed column; the rotary protection tube unit further comprises an arc-shaped plate which is arranged in the rotary hole and used for being clamped on the inner side face of the protruding plate, and a positioning groove for opening the protruding block is formed between the hole inner block and the arc-shaped plate.

The further preferred technical scheme is as follows: the clamping cylinder unit also comprises a cylinder slot which is arranged on the fixed column and used for increasing the retraction capacity of the convex block; the rotation protection pipe unit further includes a mounting-use retreat groove provided in the rotation hole.

The further preferred technical scheme is as follows: the rotary protection tube unit also comprises an accommodating slot which is arranged at one end of the circular tube main body, is close to the needle cylinder main body and is used for clamping the needle cylinder main body after rotation.

The further preferred technical scheme is as follows: the cylinder unit for clamping further comprises a blocking cylinder which is arranged on the needle mounting pipe and used for limiting the arc-shaped end face of the circular pipe main body.

The further preferred technical scheme is as follows: the sealing barrel unit also comprises a positioning block arranged at one end of the needle head sealing barrel body close to the needle barrel main body; the rotary protection tube unit further comprises a limiting channel which is arranged on the circular tube main body and used for inserting and installing the positioning block.

The further preferred technical scheme is as follows: the sealing barrel unit also comprises an open-state limiting block which is arranged on the needle head sealing barrel body and is positioned in the limiting channel; the rotary protection tube unit further comprises a fixed clapboard arranged in the limiting channel.

The invention has the following advantages: firstly, when the injection needle is closed, the closed protection structure is not easy to open accidentally; secondly, when the injection is used, the injection needle can be exposed and opened only by two steps of operation, so that the injection operation is more convenient and quicker; thirdly, no useless parts are generated in the whole injection process, the injection needle can still obtain the same strength of sealing protection effect after the injection is finished, and the subsequent waste treatment is more efficient and safer; fourthly, the required force of the rotary opening and closing operation of the needle cylinder is moderate, the connection between the structures of the needle cylinder is stable, and the collocation is reasonable.

Drawings

Fig. 1 is a schematic view of the present invention in an idle state with the needle closed.

FIG. 2 is a schematic view of the position of the engaging cylinder unit according to the present invention.

FIG. 3 is a schematic view showing the state of the syringe in use according to the present invention.

Fig. 4 is a schematic structural view of the sleeved portion between the cylinder unit for engagement and the rotary protection tube unit in the present invention.

FIG. 5 is a schematic view of a position structure of the engaging cylinder unit according to the present invention.

Fig. 6 is a schematic structural view of the rotary protection tube unit of the present invention.

FIG. 7 is a schematic structural diagram of the position of the working groove of the present invention.

Fig. 8 is a schematic structural view of a sealing cartridge unit according to the present invention.

In the drawings, the reference numerals denote the following components: the syringe includes a syringe body 11, a needle mounting tube 12, an injection needle 13, a cylinder unit 1 for engagement, a rotation protection tube unit 2, a seal cylinder unit 3, a fixed column 101, a projection 102, a circular tube body 201, a rotation hole 202, an inner hole block 203, a working groove 204, a needle seal cylinder 301, a projection plate 103, an arc plate 205, an opening positioning groove 206, a cylinder groove 104, a mounting retraction groove 207, an accommodation groove 208, a stopper cylinder 105, a positioning block 302, a stopper channel 209, an open stopper 303, and a fixed partition 210.

Detailed Description

The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Example (b): as shown in fig. 1 to 8, an integral protection type syringe includes a syringe body 11, a needle mounting tube 12, an injection needle 13, a cylinder unit 1 for engagement disposed on the needle mounting tube 12, a rotary protection tube unit 2 fitted over the needle mounting tube 12 and the injection needle 13 and fitted over the cylinder unit 1 for engagement, and a sealing tube unit 3 disposed in the rotary protection tube unit 2 and fitted over the injection needle 13 before the rotary protection tube unit 2 rotates.

In this embodiment, the syringe body 11, the needle mounting tube 12 and the injection needle 13 constitute the main structure of the existing syringe, and the "protection type" means that the cylinder unit 1 for engagement and the needle mounting tube 12 are integrally formed, the rotary protection tube unit 2 is engaged with the cylinder unit 1 for engagement, the sealing cylinder unit 3 is inserted into the rotary protection tube unit 2, and finally the sealing cylinder unit 3 covers the injection needle 13, so that the function of the "protection type" can be ensured to be continuously effective as long as the engagement structure and the insertion structure cannot be easily and accidentally disassembled in the whole syringe structure.

The term "integral" means that the syringe is returned to the same structural state as before use without dropping useless fine parts during the entire use, and therefore, only the relative positions of the engaging cylinder unit 1 and the rotation protection tube unit 2 and between the rotation protection tube unit 2 and the seal cylinder unit 3 are changed and the syringe is not detached or separated.

Finally, the general method of use of the syringe in this embodiment is as follows.

First, the sealing cartridge unit 3 is pulled out until the injection needle 13 is completely exposed, and the sealing cartridge unit 3 remains locked to the rotary protective tube unit 2.

Secondly, the rotating protective tube unit 2, together with the sealing cylinder unit 3, rotates around the clamping cylinder unit 1 at an obtuse angle, for example, 120 ° to 150 °, ensuring that the injection needle 13 is free of sufficient space for normal injection operation.

Thirdly, after the injection operation is completed, the rotation protection tube unit 2, together with the sealing cylinder unit 3, is rotated in the reverse direction by the same angle as before again around the engaging cylinder unit 1 until the rotation protection tube unit 2 is restored to the original position on the engaging cylinder unit 1.

Fourthly, the last step, namely pushing the sealing barrel unit 3 inwards until the sealing barrel unit 3 is clamped at the initial position, so that the whole needle cylinder can directly enter a medical appliance discarding process after being used, and the operation such as cutting a needle head is not needed.

The engaging cylinder unit 1 includes a fixing post 101 provided on the needle mounting tube 12, and a projection 102 provided on an annular surface of the fixing post 101 and engaging with the rotation protection tube unit 2.

In this embodiment, the profile of the fixing column 101 is a cylinder to ensure that the rotating protection tube unit 2 has a sufficient annular surface limiting effect, and the rotating protection tube unit 2 has a latching slot for the protruding block 102, so that when the rotating protection tube unit 2 is rotated to open, the protruding block 102 can be uniquely and stably latched in the latching slot to ensure that the rotating protection tube unit 2 cannot be accidentally rotated to close.

The rotation protection tube unit 2 includes a circular tube main body 201, a rotation hole 202 provided at an end of the circular tube main body 201 close to the cylinder main body 11 and adapted to insert and mount the fixing post 101, an in-hole block 203 provided in the rotation hole 202 and adapted to engage with the protruding block 102, and a working slot 204 provided on the circular tube main body 201 and adapted to be rotated outward to move out the needle mounting tube 12 and the injection needle 13.

In this embodiment, the number of the slotted block units 1 is two, and the slotted block units are symmetrically arranged on the needle mounting tube 12, so that the number of the rotating holes 202 is two correspondingly, and then the rotating holes are matched with the working slots 204, so that at least the smooth rotation of the circular tube main body 201 can be ensured, that is, the injection needle 13 is covered before the rotation, and the injection needle 13 is smoothly moved out of the working slots 204 after the rotation.

The inner hole block 203 is a limiting structure that the protruding block 102 needs to "overtake", which ensures that the protruding block 102 can pass over the inner hole block 203 under the operation and force application, and when the protruding block 102 is accidentally touched to a relatively small extent, the protruding block 102 cannot pass back over the inner hole block 203, that is, the circular tube main body 201 is opened, so that the protruding block is not easily accidentally rotated and retracted.

Therefore, the size, shape, elasticity, etc. of the protruding block 102 and the hole block 203 are important and can be determined after many times of experiments.

The sealing cylinder unit 3 comprises a needle head sealing cylinder body 301 which is arranged in the circular tube main body 201 and clamped on the needle mounting tube 12.

In this embodiment, the engaging cylinder unit 1 may be made of a material identical to that of the needle mounting tube 12, for example, a medical COC material, the rotating protection tube unit 2 may be made of a medical PP material, and the needle sealing cylinder 301 may be made of a medical TPE material.

In addition, the force by which the needle sealing barrel 301 stabilizes the state in which the cap protects the needle 13 can be derived from two sources: firstly, the needle sealing cylinder 301 has proper elasticity, and can be clamped on the needle mounting tube 12 with a thin end and a thick end; second, the needle sealing cylinder 301 can be snapped into the barrel 201 and pressed inwardly as appropriate.

The clamping cylinder unit 1 further comprises a protruding plate 103 arranged on the fixed column 101; the rotary protection tube unit 2 further comprises an arc-shaped plate 205 arranged in the rotary hole 202 and clamped on the inner side surface of the protruding plate 103, and an opening positioning groove 206 of the protruding block 102 is formed between the hole inner block 203 and the arc-shaped plate 205.

In this embodiment, the circular tube main body 201 needs to be stable in the rotating process, and cannot shake back and forth compared with the two fixing columns 101, so that the two aligned fixing columns 101 are used as axes, and the circular tube main body 201 needs to have an axial limiting effect without affecting the rotating motion of the circular tube main body.

And arc protruding board 103 presses on the arc 205, has satisfied above-mentioned two requirements "do not influence rotation", "axial is spacing" simultaneously, pipe main part 201 both sides all have a pair of protruding board 104, arc 205, can guarantee the rotatory in-process of pipe main part 201 can not appear rocking by a wide margin.

In addition, after the protruding block 102 passes over the hole inner block 203, which is the normal opening state of the circular tube main body 201, at this time, although the circular tube main body is rotated in place, there is a problem of over-rotation, so that the arc plate 205 blocks the rotating protruding block 102, that is, the opening positioning groove 206 is formed, so that the protruding block 102 has a uniquely determined opening position, in other words, the width of the arc plate 205 is large, and the protruding block 102 cannot be pushed onto the arc plate 205.

The clamping cylinder unit 1 further comprises a cylinder slot 104 which is arranged on the fixing column 101 and is used for increasing the retraction capacity of the convex block 102; the rotation protection tube unit 2 further includes an installation retreat groove 207 provided in the rotation hole 202.

In this embodiment, the protruding block 102 needs to go over the inner hole block 203 and go back and forth twice, so that the protruding block 102 and the inner hole block 203 need to be deformed and contracted properly, but the deformation amount may still be insufficient, so the cylinder slot 104 is introduced, so that the protruding block 102 has proper retraction capability, the force needed to go over the inner hole block 203 is ensured to be proper, and the problem that the circular tube main body 201 is not easy to rotate to open and rotate to close is avoided.

In addition, when the rotary protection tube unit 2 is installed with the clamping cylinder unit 1, the protruding plate 103 needs to go beyond the arc plate 205 outwards, and at this time, if the rotary hole 202 is a complete circle, the crossing action between the protruding plate 103 and the arc plate 205 must be completed by means of self deformation, so that the protruding plate 103 or the arc plate 205 is likely to be directly extruded and dropped.

The installation retraction groove 207 is introduced so that the projection plate 103 is passed over the arc-shaped plate 205, the rotation hole 202 is properly misaligned with the fixing post 101, and the projection 102 is properly inserted into the installation retraction groove 207, so that the projection plate 103 is caught on the exposed upper surface of the arc-shaped plate 205.

The rotary protection tube unit 2 further includes an accommodating slot 208 provided at one end of the circular tube body 201 close to the cylinder body 11 and adapted to engage with the cylinder body 11 after rotation.

In this embodiment, if the socket end of the circular tube main body 201 and the circular tube main body 201 is a complete circular end face, the circular end face or the end face abuts against the syringe main body 11 after the circular tube main body 201 rotates to open an obtuse angle, which causes a problem of rotation failure, so that this is the main function of the accommodating slot 208.

Further, the accommodating slot 208 and the working slot 204 are symmetrically formed, so that the circular tube portions respectively provided with the two rotating holes 202 are formed into two "convex" plate shapes, and are relatively easily separated and mounted when being sleeved with the fixing post 101.

The engaging cylinder unit 1 further includes a stopper cylinder 105 provided on the needle mounting tube 12 and configured to limit the arc-shaped end surface of the circular tube main body 201.

In this embodiment, the arcuate plate 205, the mounting return 207, and the blocking cylinder 105 are a complete "chain" for the following reasons:

firstly, the pipe main part 201 needs stable rotation, consequently sets up arc 205 with protruding board 103 mutual block guarantees that pipe main part 201 can not rock about rotatory.

Then, in order to install the arc plate 205 and the projection plate 103, the installation retreat groove 207 is opened, but at the same time, there is a problem in that the rotation hole 202 is not a complete circle any more, and the projection block 102 is easily displaced into the installation retreat groove 207 when it rotates to pass through the installation retreat groove 207, so that the entire circular tube main body 201 is displaced upward.

Therefore, at last, the blocking cylinder 105 is introduced and is always clamped on the outer annular surface of the sleeved end of the circular tube main body 201, and finally, the circular tube main body 201 is ensured not to have large shaking amplitude left and right, up and down when rotating.

The sealing barrel unit 3 further comprises a positioning block 302 arranged at one end of the needle sealing barrel body 301 close to the syringe main body 11; the rotary protection tube unit 2 further includes a limit groove 209 provided on the circular tube main body 201 and used for inserting and mounting the positioning block 302.

In this embodiment, the needle sealing barrel 301 is used by the following method: and the needle sealing cylinder 301 is pulled out to expose the injection needle 13, and at this time, the needle sealing cylinder 301 still cannot be separated from the circular tube main body 201, so as to ensure that the whole injection operation has the advantage of no falling of small parts, and in this process, the positioning block 302 must be always positioned in the limiting channel 209, so as to ensure that the needle sealing cylinder 301 cannot rotate and cannot be completely moved out and dropped.

The sealing barrel unit 3 further comprises an open-state limiting block 303 which is arranged on the needle sealing barrel body 301 and is positioned in the limiting channel 209; the rotary protection tube unit 2 further includes a stationary partition 210 disposed in the limiting channel 209.

In this embodiment, after the needle sealing cylinder 301 is pulled out to the proper position, there is a situation that the needle sealing cylinder 301 will move back inward, so the open-state limiting block 303 is introduced, so that when the needle sealing cylinder 301 is pulled out to the proper position, the open-state limiting block 303 can be pressed against the end surface of the circular tube main body 201.

Correspondingly, the size of the open stopper 303 cannot be too large because it needs to pass over a small section of the tube body inside the tube body 201.

Finally, the stationary plate 210 defines a stationary opening in the retaining channel 209 for retaining the retainer block 302, such that the needle seal barrel 301 has an initial anti-drop configuration on the barrel body 201, but correspondingly, the retainer block 302 must also pass over the inner side of the stationary plate 210 when the needle seal barrel 301 is opened.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various modifications can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. These are non-inventive modifications, which are intended to be protected by patent laws within the scope of the claims appended hereto.

Claims

1. An integral protection type syringe, includes syringe main part (11), needle installation pipe (12) to and syringe needle (13), its characterized in that: still including setting up cylinder unit (1) is used in the block on needle installation pipe (12), the cover is in on needle installation pipe (12) and syringe needle (13) and with rotatory protection tube unit (2) that cylinder unit (1) cup jointed are used in the block, and set up in rotatory protection tube unit (2) and be used for the cover before rotatory protection tube unit (2) is rotatory sealed section of thick bamboo unit (3) on syringe needle (13).

2. The syringe of claim 1, wherein: the clamping cylinder unit (1) comprises a fixed column (101) arranged on the needle mounting tube (12) and a protruding block (102) arranged on the annular surface of the fixed column (101) and used for clamping the rotary protection tube unit (2).

3. The syringe of claim 2, wherein: the rotary protection tube unit (2) comprises a circular tube main body (201), a rotary hole (202) which is arranged at one end, close to the needle cylinder main body (11), of the circular tube main body (201) and used for inserting and installing the fixing column (101), a hole inner block (203) which is arranged in the rotary hole (202) and used for clamping the protruding block (102), and a working notch (204) which is arranged on the circular tube main body (201) and used for outwards rotating and moving out the needle installation tube (12) and the injection needle (13).

4. The syringe of claim 3, wherein: the sealing barrel unit (3) comprises a needle head sealing barrel body (301) which is arranged in the circular tube main body (201) and covers the injection needle (13).

5. The syringe of claim 3, wherein: the clamping cylinder unit (1) further comprises a protruding plate (103) arranged on the fixing column (101); the rotary protection tube unit (2) further comprises an arc-shaped plate (205) which is arranged in the rotary hole (202) and used for being clamped on the inner side face of the protruding plate (103), and a positioning groove (206) for opening the protruding block (102) is formed between the hole inner block (203) and the arc-shaped plate (205).

6. The syringe of claim 5, wherein: the clamping cylinder unit (1) further comprises a cylinder groove (104) which is arranged on the fixed cylinder (101) and is used for increasing the retraction capacity of the protruding block (102); the rotation protection tube unit (2) further includes a mounting retraction groove (207) provided in the rotation hole (202).

7. The syringe of claim 3, wherein: the rotary protection tube unit (2) further comprises an accommodating slot (208) which is arranged at one end, close to the syringe main body (11), of the circular tube main body (201) and is used for clamping the syringe main body (11) after rotation.

8. The syringe of claim 6, wherein: the clamping cylinder unit (1) further comprises a blocking cylinder (105) which is arranged on the needle mounting tube (12) and used for limiting the arc-shaped end face of the circular tube main body (201).

9. The syringe of claim 4, wherein: the sealing barrel unit (3) further comprises a positioning block (302) arranged at one end of the needle sealing barrel body (301) close to the needle barrel body (11); the rotary protection tube unit (2) further comprises a limiting channel (209) which is arranged on the circular tube main body (201) and used for inserting and installing the positioning block (302).

10. The syringe of claim 8, wherein: the sealing barrel unit (3) further comprises an open-state limiting block (303) which is arranged on the needle head sealing barrel body (301) and is positioned in the limiting channel (209); the rotary protection tube unit (2) further comprises a fixed-state partition plate (210) arranged in the limiting channel (209).