WO2023088341A1

WO2023088341A1 - Protective syringe capable of being precisely positioned

Info

Publication number: WO2023088341A1
Application number: PCT/CN2022/132473
Authority: WO
Inventors: 郭融; 沈靖
Original assignee: 上海倍莱弗科技有限公司
Priority date: 2021-11-19
Filing date: 2022-11-17
Publication date: 2023-05-25

Abstract

A protective syringe capable of being precisely positioned, relating to the technical field of medical devices. The present syringe makes an entire injection operation process of the syringe safer, more accurate, and more reliable by means of providing a fixed shaft body unit (1), an open rotating tube unit (2), a mounting hole unit (3), and a protruding block unit (4) on a hub (b) of the syringe. The syringe has the following advantages: first, the open rotating tube unit (2) can protect a needle (c) structurally, thereby reducing the risk of the needle (c) being bent and deformed; second, the open rotating tube unit (2) has a clamping and positioning effect during injection and disposal, so that the needle (c) is not prone to being exposed accidentally, and not prone to cause accidental sticks; third, an entire rotation and engagement operation of the open rotating tube unit (2) is simple, stable, reliable, and precise; and fourth, an external structure protection function of the entire needle (c) is simple and efficient, and when used together with an internal rubber tube, a comprehensive sealing protection and structural protection effect can be achieved.

Description

A Precisely Positioned Protective Syringe

technical field

The invention belongs to the technical field of medical appliances, in particular to a precisely positioned protective syringe.

Background technique

The composition of the syringe barrel structure mainly includes a cylinder body, a connecting tube, a needle and a needle cover, and a push rod is added to the syringe barrel to form a complete syringe. Among them, the existing common needle sleeve structure is just a simple rubber tube, which is sleeved on the connecting tube to initially seal and protect the needle.

technical problem

For example, the Chinese utility model patent whose patent announcement number is CN2756243Y and whose announcement date is 2006.02.08 discloses a pull-back type safety injection syringe, including: a needle cover, an upper needle seat, a lower needle seat, a rubber plug, a push rod and The barrel body is combined to form a complete safety injection syringe. When the medicine is injected, it can be pulled back by the push rod, and the upper and lower needle seats are connected together with the buckle to be pulled down, so that the needle embedded in the upper needle seat The needle is hidden in the barrel, and then the push rod is broken to avoid accidentally injuring yourself and others with the needle.

However, the needle sleeve structure of the injection syringe in this utility model patent is relatively simple. Even if the sealing effect is no problem, its structural protection effect on the needle is missing. .

So what is more advanced is that a combined needle tube structure of "inner seal and outer protection" has appeared.

For another example, the Chinese utility model patent with the patent announcement number CN 211705510U and the announcement date of 2020.10.20 discloses a protective device for preventing iatrogenic needlestick injuries, which includes a fixing ring, and the outer side of the fixing ring is fixedly installed with two The two connecting shafts are symmetrically distributed, and a U-shaped frame is arranged on the connecting shaft, and both ends of the U-shaped frame are rotatably connected with the two connecting shafts. One end of the torsion spring is fixedly connected to the U-shaped frame, and the other end of the torsion spring is fixedly connected to the connecting shaft.

In this utility model patent, the ordinary rubber tube ensures the "inner sealing" effect, the U-shaped frame ensures the "outer protection" effect, and the function of the combined needle tube is basically achieved.

However, this anti-stab syringe has at least the following problems: 1. The effect of the "outer protection" is not comprehensive enough, and the needle may still be easily bent or bent; There is no fixed force in the open state of the U-shaped frame, which makes the medical personnel press the U-shaped frame all the time during the injection operation, which is very laborious and dangerous; 3. The force of the U-shaped frame to protect the needle comes only from A torsion spring is not enough, once the U-shaped frame is knocked and rotated, the needle is exposed again, which is very dangerous.

Therefore, in summary, there is an urgent need for an improved needle sleeve structure with comprehensive needle protection effect and safer and more convenient injection operation.

technical solution

The invention provides a precisely positioned protective syringe, which can make the entire syringe The injection operation process is safer, more precise and more reliable.

The technical solution adopted by the present invention to solve the above problems is: a precisely positioned protective syringe, including a cylinder body, a connecting tube, and a needle, and also includes a fixed shaft unit arranged on the connecting tube, sleeved on the The opening rotating tube unit on the connection tube and the needle, the installation hole unit provided on the opening rotation tube unit and used to insert the fixed shaft unit, and the installation hole unit arranged on the opening rotation tube unit The rotation direction of the unit is used to engage the protruding block unit of the fixed shaft unit.

A further preferred technical solution is that: the fixed shaft unit includes a cylinder arranged on the connecting pipe, and an engaging block arranged on the cylinder and used for engaging the protruding block unit.

A further preferred technical solution is that: the opening rotating tube unit includes a circular tube body sleeved on the connecting tube and the needle, and is arranged on the circular tube body and is used to rotate outward to remove the connecting tube and needle. The tip of the needle opens the slot.

A further preferred technical solution is that: the installation hole unit includes a circular hole provided on the circular pipe body and used for inserting and installing the cylinder and the engaging block.

A further preferred technical solution is that: the protruding block unit includes a middle block arranged on the circular hole, which is arranged on the circular hole and forms a lock in the opened state of the syringe with the middle block. A block at the end of rotation of the groove, and a block at the start of rotation which is arranged on the circular hole and forms a locking groove with the middle block between the scrapped state of the syringe.

A further preferred technical solution is that: the fixed shaft unit also includes an end that is arranged on the cylinder and engages the upper surface of the middle block to limit and fix the circular pipe. plate.

A further preferred technical solution is that: the installation hole unit also includes a method for accommodating the engaging block by misalignment when it is arranged on the circular hole and when the fixed shaft unit is inserted and installed, so as to allow the The end plate goes over the hole upper side slot of the middle block.

A further preferred technical solution is that: the to-be-opened position of the engaging block is located between the locking slot in the opened state of the syringe and the locking slot in the discarded state of the syringe.

A further preferred technical solution is that: the opening rotating tube unit further includes an end receiving groove arranged on the circular tube body and used for clamping into the cylinder body after the circular tube body is rotated open.

A further preferred technical solution is that: the protruding block unit further includes a sliding inclined surface provided on the rotating terminal block and used to receive the lower surface of the engaging block during sliding.

Beneficial effect

The present invention has the following advantages:

First, the open rotating tube unit can provide structural protection for the needle, reducing the risk of the needle being bent and deformed;

Second, the open rotary tube unit has a locking and positioning effect during injection and when it is scrapped, so that the needle is not easy to be accidentally exposed, and it is not easy to cause stabbing accidents;

Third, the entire rotation and snap-fit operation of the open rotary tube unit is simple, stable, reliable and precise;

Fourth, the external structure protection function of the entire needle is simple and efficient. After matching with the internal rubber tube, it can achieve comprehensive sealing protection and structural protection effect.

Description of drawings

Fig. 1 is a schematic diagram of the ready-to-use state of the protective syringe in the present invention.

Fig. 2 is a schematic diagram of the rotation and opening state of the protective syringe in the present invention.

Fig. 3 is a schematic diagram of the scrapped state of the protective syringe in reverse rotation in the present invention.

Fig. 4 is a schematic diagram of the position and structure of the fixed shaft unit in the present invention.

Fig. 5 is a schematic structural view of the opening rotating tube unit in the present invention.

Fig. 6 is a schematic diagram of the position and structure of the mounting hole unit and the protruding block unit in the present invention.

In the accompanying drawings, the parts represented by each label are as follows: barrel a, connecting tube b, needle c, fixed shaft unit 1, opening rotating tube unit 2, mounting hole unit 3, protruding block unit 4, cylinder 101, Engagement block 102, circular tube body 201, end opening slot 202, circular hole 301, middle block 401, rotation end block 402, rotation start end block 403, end plate 103, hole upper side The groove 302 , the terminal receiving groove 203 , and the inclined surface 404 for sliding.

Embodiments of the present invention

The following descriptions are only preferred embodiments of the present invention, and do not limit the scope of the present invention.

Embodiment: As shown in accompanying drawings 1-6, a precisely positioned protective syringe includes a cylinder body a, a connecting tube b, and a needle c, and also includes a fixed shaft unit arranged on the connecting tube b 1. The opening rotating tube unit 2 sleeved on the connecting tube b and the needle c, which is arranged on the opening rotating tube unit 2 and is used to insert the installation hole unit 3 of the fixed shaft unit 1, and is arranged on the The protruding block unit 4 on the mounting hole unit 3 and used to engage the fixed shaft unit 1 in the rotation direction of the opening rotating tube unit 2 .

In this embodiment, the number of the fixed shaft units 1 is two, so the corresponding number of the installation hole units 3 and the protruding block units 4 are also two.

In addition, when the protective syringe is ready for use, the opening rotating tube unit 2 is flush with the cylinder a, and the state during injection is that the opening rotating tube unit 2 and the cylinder a are in the same position. An acute angle, which means that the opening rotating tube unit 2 has smoothly rotated through an obtuse angle, so that enough space for the injection operation can be left at the needle c.

Secondly, the protruding block unit 4 has different functions in the circumferential and axial directions of the fixed shaft unit 1:

The circumferential direction is the rotation direction of the opening rotating tube unit 2, and the protruding block unit 4 can be engaged and fixed by the fixed shaft unit 1 to ensure that the opening rotating tube unit 2 is in the injection state and is scrapped. state, its rotation angle will not change easily;

The axial direction is the length direction of the fixed shaft unit 1 and the direction perpendicular to the rotation plane of the open rotating tube unit 2. At this time, the protruding block unit 4 is always engaged and fixed by the fixed shaft unit 1 , to ensure that no matter whether the opening rotating tube unit 2 is rotating or not, the problem of shaking on both sides is unlikely to occur.

Finally, the open rotating tube unit 2 is equipped with a common one-end closed rubber tube, which is inwardly sleeved on the connecting tube b and pushed outwardly against the inner ring surface of the open rotating tube unit 2 , before the opening rotating tube unit 2 starts to rotate, it can ensure that both effects of sealing protection and structural protection of the needle c are effective without interfering with each other.

The fixed shaft unit 1 includes a cylinder 101 disposed on the connecting pipe b, and an engaging block 102 disposed on the cylinder 101 and used for engaging the protruding block unit 4 .

In this embodiment, the cylinder 101 is used to insert into the installation hole unit 3, so that the opening rotating tube unit 2 can effectively rotate around the cylinder 101, and the protruding block unit 4 has at least Two notches need to be opened for the engaging block 102, one is the "working slot" when the open rotary tube unit 2 is fully rotated and opened, and the other is when the open rotary tube unit 2 rotates in reverse. The "retirement status card slot".

In addition, it is also possible to open a third notch, which is the "slot in the waiting state". At this time, the rotation angle from the "slot in the waiting state" to the "slot in the working state" is, for example, 120°. The rotation angle from the "slot in standby state" to the "slot in scrapped state" is, for example, 15° in the opposite direction, so as to ensure that the open rotating tube unit 2 can be effectively protected and covered during injection operation and safe disposal The needle c avoids needle sticking accidents.

Finally, the groove depths of the above three notches are arranged from large to small, or the difficulty of rotating and removing the engaging block 102 from its inner side is arranged from high to low, in order: the working state of the slot, the scrapped state of the slot , The slot in the waiting position, after all, it is the most basic and critical requirement that the opening rotating tube unit 2 will not accidentally rotate and fall during the injection operation.

The opening rotating tube unit 2 includes a circular tube body 201 sleeved on the connecting tube b and the needle c, and is arranged on the circular tube body 201 and is used to rotate outward to remove the connecting tube b and the needle c. The end of c opens the groove 202.

In this embodiment, the end opening groove 202 needs to be opened outward from the rotation center end of the circular tube body 201 until the connecting tube b and the needle c are rotated from the circular tube body 201 Untouchable when removed.

The installation hole unit 3 includes a circular hole 301 provided on the circular tube body 201 and used for inserting and installing the cylinder body 101 and the engaging block 102 .

In this embodiment, the circular hole 301 cooperates with the cylinder 101 to ensure that the circular tube 201 has the most basic stable rotation effect.

The protruding block unit 4 includes a middle block 401 arranged on the circular hole 301, which is arranged on the circular hole 301 and forms a locking groove in the open state of the syringe with the middle block 401. The block 402 at the end of rotation, and the block 403 at the start of rotation, which is arranged on the circular hole 301 and forms a locking groove with the middle block 401 in the discarded state of the syringe.

In this embodiment, the rotation path of the engaging block 102 is to move from the side of the slot in the discarded state of the syringe first to the slot in the open state of the syringe, and finally move in the reverse direction to the slot in the open state. The syringe is discarded and stuck in the slot.

In the ready-to-use state of the protective syringe, the engaging block 102 does not necessarily need to be engaged and fixed. The reason is as follows: in the ready-to-use state, the inside of the circular tube body 201 has a rubber tube for sealing, and the outside There is a packaging bag, so the circular tube body 201 has the basic advantage of being difficult to accidentally rotate at this moment.

Finally, the size specification of the block body 402 at the end of rotation is larger than the block body 403 at the start point of rotation, which is also consistent with the requirement of the maximum depth of the above-mentioned "slot in working state".

The fixed shaft unit 1 further includes an end plate 103 arranged on the cylinder 101 and engaging the upper surface of the middle block 401 to limit and fix the circular tube 201 .

In this embodiment, the function of the two end surfaces of the middle block 401 is to form a card slot together with the rotation end block 402 and the rotation start end block 403, and the middle The function of the upper surface of the block 401 is to be stuck by the end plate 103 all the time, and the end plates 103 of the two fixed shaft units 1 on both sides are always stuck The two corresponding middle blocks 401 ensure that the entire open rotating tube unit 2 is less prone to accidental axial loosening and shaking in the fixed shaft unit 1 .

The installation hole unit 3 also includes a method that is arranged on the circular hole 301 and accommodates the engaging block 102 by misalignment when the fixed shaft unit 1 is inserted and installed, so that the end head The plate 103 passes over the hole upper side groove 302 of the middle block 401 .

In this embodiment, precisely because the end plate 103 is to be pressed on the outer upper surface of the middle block 401, when the circular hole 301 is inserted into the fixed shaft unit 1, the The end plate 103 must go over the middle block 401.

At this time, if there is no side groove 302 on the hole, the size requirements of the above-mentioned "over" operation must be "digested" by the deformation of the end plate 103 and the middle block 401 itself, which is very important. It is difficult and extremely easy to directly break off the end plate 103 or the middle block 401 .

Therefore, the side groove 302 on the hole is introduced, so that the entire fixed shaft unit 1 can be installed in a dislocation with the installation hole unit 3, that is, when inserted and installed, the engaging block 102 is located on the upper side of the hole In the side groove 302, the end plate 103 "bends" and runs onto the middle block 401 to complete the entire insertion operation.

The to-be-opened position of the engaging block 102 is located between the locking slot of the opened state of the syringe and the locking slot of the discarded state of the syringe.

In this embodiment, when the protective syringe is to be opened, the engaging block 102 is located on the outer side of the locking groove in the discarded state of the syringe, that is, near the block 403 at the starting point of rotation. The engaging block 102 does not need to be engaged.

The opening rotating tube unit 2 also includes an end receiving groove 203 arranged on the circular tube body 201 and used for snapping into the barrel a after the circular tube body 201 is rotated open.

In this embodiment, in order to leave enough space for the injection operation for the needle c, the circular tube 201 must be rotated through an obtuse angle, and the structurally matching at least has Two points:

First, an angle greater than 90° is spanned between the standby position of the engaging block 102 and the opening slot of the syringe;

Second, the end receiving groove 203 is used to accommodate the barrel a after opening.

Finally, the terminal accommodating groove 203 and the terminal opening groove 202 are arranged in a bilaterally symmetrical positional relationship with respect to the circular tube body 201. After all, the former is used to accommodate the cylinder a and the latter is used to Then remove the connecting tube b and needle c.

The protruding block unit 4 further includes a sliding inclined surface 404 disposed on the rotating end block 402 and used to receive the lower surface of the engaging block 102 that is sliding.

In this embodiment, in the open state of the protective syringe, the engaging block 102 needs to pass over the end block 402 of rotation, otherwise it is relatively difficult for the engaging block 102 to move from the The syringe in the open state slides out of the slot, so the sliding slope 404 faces the sliding direction of the engaging block 102 and away from the side of the slot in the open state of the syringe, so that the circular tube body 201 It has the characteristics that it is relatively easy to rotate and open, and relatively difficult to rotate and retract. After all, it is required to be fast when rotating and opening, and it can be operated slowly with great force when rotating and retracting.

The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, within the scope of knowledge possessed by those of ordinary skill in the technical field, it can also be done without departing from the gist of the present invention. Make various modifications. These are all non-creative modifications, as long as they are all protected by the patent law within the scope of the claims of the present invention.

Claims

A precisely positioned protective syringe, comprising a cylinder body (a), a connecting tube (b), and a needle (c), characterized in that it also includes a fixed shaft unit arranged on the connecting tube (b) (1), the opening rotating tube unit (2) sleeved on the connecting tube (b) and the needle (c), set on the opening rotating tube unit (2) and used to insert the fixed shaft unit ( 1) the installation hole unit (3), and the installation hole unit (3) and used to engage the fixed shaft unit (1) in the rotation direction of the opening rotating tube unit (2) The protruding block unit (4).
The precise positioning protective syringe according to claim 1, characterized in that: the fixed shaft unit (1) includes a cylinder (101) arranged on the connecting pipe (b), and An engaging block (102) on the cylinder (101) for engaging the protruding block unit (4).
The precise positioning protective syringe according to claim 2, characterized in that: the opening rotating tube unit (2) includes a circular tube sleeved on the connecting tube (b) and the needle (c) body (201), and an end opening slot (202) arranged on the circular tube body (201) and used to rotate outward to remove the connecting tube (b) and needle (c).
The precise positioning protective syringe according to claim 3, characterized in that: the installation hole unit (3) includes a cylinder set on the circular tube (201) and used to insert and install the cylinder (101) and the circular hole (301) of the engaging block (102).
The precise positioning protective syringe according to claim 4, characterized in that: the protruding block unit (4) includes a middle block (401) arranged on the circular hole (301), The rotation terminal end block (402) which is arranged on the circular hole (301) and forms a locking groove in the open state of the syringe with the middle block (401), and the end block (402) arranged on the circular hole (301) ) and between the middle block (401) and the rotation starting point end block (403) that forms a slot for the scrapped state of the syringe.
The precise positioning protective syringe according to claim 5, characterized in that: the fixed shaft unit (1) also includes a cylinder that is arranged on the cylinder (101) and engages the middle block The upper surface of the body (401) is used to limit and fix the end plate (103) of the circular pipe body (201).
The precise positioning protective syringe according to claim 6, characterized in that: the installation hole unit (3) also includes a fixed shaft that is arranged on the circular hole (301) and is inserted into and installed on the fixed shaft. When the body unit (1) is used, the clamping block (102) is accommodated by misalignment, so that the end plate (103) can pass over the upper side groove (302) of the hole in the middle block (401) ).
The precise positioning protective syringe according to claim 5, characterized in that: the to-be-opened position of the engaging block (102) is located between the opening slot of the syringe and the slot of the scrapped syringe between.
The precise positioning protective syringe according to claim 3, characterized in that: the opening rotating tube unit (2) also includes a circular tube body (201) arranged on the circular The tube body (201) is used to snap into the end receiving groove (203) of the cylinder body (a) after being rotated open.
The precise positioning protective needle cylinder according to claim 5, characterized in that: the protruding block unit (4) also includes a set on the rotating end block (402) and is used to receive sliding The sliding inclined surface (404) on the lower surface of the engaging block (102).