A protective syringe with precise positioning

Abstract

The present invention belongs to the technical field of medical appliances, and particularly relates to a protective syringe with precise positioning. By setting a fixed shaft body unit, an open rotating tube unit, a mounting hole unit, and a protruding block unit on the connecting tube of the syringe, the entire injection operation process of the syringe is made safer, more precise, and more reliable. 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 rotating tube unit has a clamping and positioning effect during injection and at the time of scrapping, making it difficult for the needle to accidentally expose and causing no stabbing accidents; Third, the entire rotation and clamping operation of the open rotating tube unit is simple, stable, reliable, and precise; Fourth, the external structure protection function of the entire needle is simple and efficient, and when combined with the internal rubber tube, it can achieve a comprehensive sealing protection and structural protection effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical appliances, and particularly relates to a protective syringe with precise positioning. Background Art

[0002] The structure of a syringe barrel mainly includes a barrel body, a connecting tube, a needle head, and a needle sleeve. Adding a push rod outside the syringe barrel forms a complete syringe. Among them, the existing common needle sleeve structure is a simple rubber tube that is put on the connecting tube to initially seal and protect the needle head.

[0003] For example, a Chinese utility model patent with the patent publication number CN2756243Y and the publication date of February 8, 2006, discloses a pull-back type safety syringe barrel, including: a needle sleeve, an upper needle seat, a lower needle seat, a rubber stopper, a push rod, and a barrel body. By combining them, a complete safety syringe barrel is formed. After the medicine injection is completed, the push rod can be pulled backward, and the upper and lower needle seats connected by a buckle are pulled down, so that the needle head embedded in the upper needle seat hides in the barrel body, and then the push rod is broken to avoid the needle head hurting oneself and others.

[0004] However, for the syringe barrel in this utility model patent, its needle sleeve structure is relatively simple. Even if the sealing effect is okay, the structural protection for the needle head is lacking. For example, when the needle head is impacted by an external force, the needle head will be bent and deformed and directly scrapped.

[0005] Therefore, more advanced is the emergence of a combined syringe structure of "inner seal and outer protection".

[0006] For another example, a Chinese utility model patent with the patent publication number CN 211705510U and the publication date of October 20, 2020, discloses a protective device for preventing iatrogenic needle stick injuries, including a fixing ring. Two connecting shafts are fixedly installed on the outer side of the fixing ring. The two connecting shafts are symmetrically distributed. A U-shaped frame is arranged on the connecting shafts. Both ends of the U-shaped frame are rotatably connected to the two connecting shafts. A torsion spring is arranged on the outer circumference of the connecting shaft. 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.

[0007] In this utility model patent, an ordinary rubber tube ensures the "inner seal" effect, and the U-shaped frame ensures the "outer protection" effect, and the functions of the combined syringe are basically available.

[0008] However, the anti-puncture syringe still has at least the following problems: 1. The effect of "external protection" is not comprehensive enough, and the needle can still be easily bent or broken; 2. When the syringe is injected, there is no fixed force in the open state of the U-shaped frame, which requires medical staff to hold down the U-shaped frame 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, which is not enough. Once the U-shaped frame is bumped and rotated, the needle is exposed again, which is very dangerous.

[0009] Therefore, in summary, there is an urgent need for an improved needle cover structure which has a comprehensive needle protection effect and makes the entire injection operation safer and more convenient. Summary of the invention

[0010] The present invention provides a precisely positioned protective syringe, which can make the entire injection operation process of the syringe safer, more accurate and reliable by arranging a fixed shaft unit, an open rotating tube unit, a mounting hole unit and a protruding block unit on a connecting tube of the syringe.

[0011] The technical solution adopted by the present invention to solve the above-mentioned problem is: a precisely positioned protective syringe, including a barrel, a connecting tube, and a needle, and also including a fixed shaft unit arranged on the connecting tube, an open rotating tube unit sleeved on the connecting tube and the needle, a mounting hole unit arranged on the open rotating tube unit and used for inserting the fixed shaft unit, and a protruding block unit arranged on the mounting hole unit and used for engaging the fixed shaft unit in the rotation direction of the open rotating tube unit.

[0012] A further preferred technical solution is that the fixed shaft unit includes a cylinder arranged on the connecting pipe, and a locking block arranged on the cylinder and used for locking the protruding block unit.

[0013] A further preferred technical solution is that the open rotating tube unit comprises a circular tube body sleeved on the connecting tube and the needle, and an end opening groove arranged on the circular tube body and used for rotating outward to remove the connecting tube and the needle.

[0014] A further preferred technical solution is that the mounting hole unit comprises a circular hole provided on the circular tube body and used for inserting and mounting the cylinder and the engaging block.

[0015] A further preferred technical solution is that the protruding block unit includes a middle block body arranged on the circular hole, a rotation end point end block body arranged on the circular hole and forming a syringe open state slot between the middle block body, and a rotation starting point end block body arranged on the circular hole and forming a syringe scrap state slot between the middle block body.

[0016] A further preferred technical solution is that: the fixed shaft body unit further includes an end head plate which is arranged on the cylinder body and is used for limiting and fixing the circular tube body by engaging with the upper surface of the middle block body.

[0017] A further preferred technical solution is that: the mounting hole unit further includes a structure which is arranged on the circular hole and, when the fixed shaft body unit is inserted and mounted, is used for allowing the end head plate to cross the upper side groove of the hole of the middle block body by misaligned accommodation of the engaging block.

[0018] A further preferred technical solution is that: the position where the engaging block is to be opened is located between the syringe open state card slot and the syringe discarded state card slot.

[0019] A further preferred technical solution is that: the opening rotary tube unit further includes an end head accommodation groove which is arranged on the circular tube body and is used for engaging and inserting into the cylinder body after the circular tube body is rotated and opened.

[0020] A further preferred technical solution is that: the protruding block unit further includes a sliding inclined surface which is arranged on the rotary end block body and is used for receiving the lower surface of the sliding engaging block.

[0021] The present invention has the following advantages:

[0022] First, the opening rotary tube unit can provide structural protection for the needle, reducing the risk of the needle being bent and deformed.

[0023] Second, the opening rotary tube unit has an engaging and positioning effect during injection and at the time of discarding, making it difficult for the needle to accidentally expose and difficult to cause a stabbing accident.

[0024] Third, the entire rotation and engaging operation of the opening rotary tube unit is simple, stable, reliable and accurate.

[0025] Fourth, the external structure protection function of the entire needle is simple and efficient. When combined with the internal rubber tube, it can achieve a comprehensive sealing protection and structural protection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 FIG. is a schematic view of the state of the protective syringe to be used in the present invention.

[0027] Figure 2 FIG. is a schematic view of the state of the protective syringe in the state of being rotated and opened for use in the present invention.

[0028] Figure 3 FIG. is a schematic view of the state of the protective syringe in the state of being reversely rotated and discarded in the present invention.

[0029] Figure 4 FIG. is a schematic view of the position structure of the fixed shaft body unit in the present invention.

[0030] Figure 5 This is a schematic structural diagram of the opening rotating tube unit in the present invention.

[0031] Figure 6 This is a schematic position structure diagram of the mounting hole unit and the protruding block unit in the present invention.

[0032] In the attached drawings, the components represented by each reference numeral are as follows: cylinder a, connecting pipe b, needle c, fixed shaft body unit 1, opening rotating tube unit 2, mounting hole unit 3, protruding block unit 4, cylinder 101, engaging block 102, circular tube body 201, end opening groove 202, circular hole 301, middle block body 401, rotating end block body 402, rotating starting end block body 403, end plate 103, upper side groove of the hole 302, end receiving groove 203, sliding inclined surface 404. Detailed implementation manners

[0033] The following is only a preferred embodiment of the present invention, and does not limit the scope of the present invention.

[0034] Embodiment: As shown in the attached Figure 1-6 drawing, a precision-positioning protective syringe includes a cylinder a, a connecting pipe b, and a needle c, and further includes a fixed shaft body unit 1 provided on the connecting pipe b, an opening rotating tube unit 2 sleeved on the connecting pipe b and the needle c, a mounting hole unit 3 provided on the opening rotating tube unit 2 and used for inserting the fixed shaft body unit 1, and a protruding block unit 4 provided on the mounting hole unit 3 and used for engaging the fixed shaft body unit 1 in the rotating direction of the opening rotating tube unit 2.

[0035] In this embodiment, the number of the fixed shaft body units 1 is two, so the corresponding numbers of the mounting hole units 3 and the protruding block units 4 are also two.

[0036] In addition, when the protective syringe is to be used, the opening rotating tube unit 2 is flush with the cylinder a, and the state during injection is that there is an acute angle between the opening rotating tube unit 2 and the cylinder a, which means that the opening rotating tube unit 2 has successfully rotated through an obtuse angle, ensuring that enough space for injection operation can be left at the needle c.

[0037] Secondly, the protruding block unit 4 has different functions in the circumferential direction and the axial direction of the fixed shaft body unit 1:

[0038] The circumferential direction is the rotating direction of the opening rotating tube unit 2. The protruding block unit 4 can be engaged and fixed by the fixed shaft body unit 1, ensuring that the rotation angle of the opening rotating tube unit 2 will not easily change when it is in the injection state or in the scrapped state.

[0039] The axial direction is the length direction of the fixed shaft body unit 1 and the direction perpendicular to the rotation plane of the opening and rotating tube unit 2. At this time, the protruding block unit 4 is always clamped and fixed by the fixed shaft body unit 1, ensuring that the opening and rotating tube unit 2 is not prone to lateral shaking whether it is rotating or not.

[0040] Finally, a common one - end - closed rubber tube is further arranged inside the opening and rotating tube unit 2. The rubber tube is sleeved inwardly on the connecting tube b and abuts outwardly against the inner ring surface of the opening and rotating tube unit 2. It can be pulled out before the opening and rotating tube unit 2 starts to rotate, so as to ensure that both the sealing protection and the structural protection of the needle c are effective and do not interfere with each other.

[0041] The fixed shaft body unit 1 includes a cylinder 101 arranged on the connecting tube b and a clamping block 102 arranged on the cylinder 101 and used for clamping the protruding block unit 4.

[0042] In this embodiment, the cylinder 101 is used to be inserted into the mounting hole unit 3, so that the opening and rotating tube unit 2 can rotate effectively around the cylinder 101. At least two slots need to be opened on the protruding block unit 4 for the clamping block 102. One is the "working - state slot" when the opening and rotating tube unit 2 rotates completely open, and the other is the "scrapped - state slot" when the opening and rotating tube unit 2 rotates in the reverse direction.

[0043] In addition, a third slot, namely the "waiting - state slot", can also be opened. At this time, the rotation angle from the "waiting - state slot" to the "working - state slot" is, for example, 120°, and the rotation angle from the "waiting - state slot" to the "scrapped - state slot" is, for example, 15° in the reverse direction, so as to ensure that the opening and rotating tube unit 2 can effectively protect and cover the needle c during injection operations and during safe disposal, and avoid needle - stick accidents.

[0044] Finally, the slot - opening depths of the above - mentioned three slots are arranged from large to small, or rather, the difficulty of the clamping block 102 moving out from its inner side is arranged from high to low, in the order of: working - state slot, scrapped - state slot, waiting - state slot. After all, it is the most basic and crucial requirement that the opening and rotating tube unit 2 does not accidentally rotate and fall during injection operations.

[0045] The opening and rotating tube unit 2 includes a circular tube body 201 sleeved on the connecting tube b and the needle c, and an end - opening slot 202 arranged on the circular tube body 201 and used for rotating out the connecting tube b and the needle c outwardly.

[0046] In this embodiment, the end opening groove 202 needs to be opened all the way from the rotation center end of the circular tube body 201 to the outside until the connecting tube b and the needle c will not be touched when they are rotated out of the circular tube body 201.

[0047] The mounting hole unit 3 includes a circular hole 301 provided on the circular tube body 201 and used for inserting and mounting the cylinder 101 and the engaging block 102.

[0048] In this embodiment, the circular hole 301 is matched with the cylinder 101, which can ensure the most basic stable rotation effect of the circular tube body 201.

[0049] The protruding block unit 4 includes a middle block body 401 provided on the circular hole 301, a rotation end block body 402 provided on the circular hole 301 and forming a syringe open state card slot with the middle block body 401, and a rotation start end block body 403 provided on the circular hole 301 and forming a syringe scrapped state card slot with the middle block body 401.

[0050] In this embodiment, the rotation path of the engaging block 102 is from the side of the syringe scrapped state card slot, first move into the syringe open state card slot, and finally move back into the syringe scrapped state card slot.

[0051] In the to-be-used state of the protective syringe, the engaging block 102 does not have to be clamped and fixed. The reasons are as follows: In the to-be-used state, there is a rubber tube for sealing inside the circular tube body 201 and a packaging bag outside, so the circular tube body 201 already has the basic advantage of being not easily rotated accidentally at this time.

[0052] Finally, the size specification of the rotation end block body 402 is larger than that of the rotation start end block body 403, which also conforms to the requirement that the "working state card slot" needs the maximum depth.

[0053] The fixed shaft body unit 1 further includes an end head plate 103 provided on the cylinder 101 and used for limiting and fixing the circular tube body 201 by engaging the upper surface of the middle block body 401.

[0054] In this embodiment, the two end faces of the middle block 401 are used to form a card slot together with the rotation end block 402 and the rotation start end block 403. The function of the upper surface of the middle block 401 is to be continuously clamped by the end head plate 103, and the two end head plates 103 of the two fixed shaft body units 1 on both sides continuously clamp the two corresponding middle blocks 401, ensuring that the entire opening rotating tube unit 2 is not prone to accidental axial loosening and shaking on the fixed shaft body unit 1.

[0055] The mounting hole unit 3 further includes a structure provided on the circular hole 301 and when inserting and mounting the fixed shaft body unit 1, by misaligning and accommodating the engaging block 102, it is used to allow the end head plate 103 to cross over the upper side groove 302 of the hole on the middle block 401.

[0056] In this embodiment, precisely because the end head plate 103 needs to press on the outer upper surface of the middle block 401, when the circular hole 301 is inserting the fixed shaft body unit 1, the end head plate 103 must cross over the middle block 401.

[0057] At this time, if there is no upper side groove 302 of the hole, the dimensional requirements for the above-mentioned "crossing over" operation must be "digested" by the deformation of the end head plate 103 and the middle block 401 itself, which is very difficult and extremely easy to directly break the end head plate 103 or the middle block 401.

[0058] Therefore, the introduction of the upper side groove 302 of the hole enables the entire fixed shaft body unit 1 to be misaligned and installed with the mounting hole unit 3, that is, when inserting and installing, the engaging block 102 is located in the upper side groove 302 of the hole, and the end head plate 103 "bends" to reach the middle block 401 to complete the entire insertion operation.

[0059] The waiting-to-be-opened position of the engaging block 102 is located between the syringe open-state card slot and the syringe discarded-state card slot.

[0060] In this embodiment, when the protective syringe is waiting to be opened, the engaging block 102 is located on the outer side edge of the syringe discarded-state card slot, that is, near the rotation start end block 403. At this time, no clamping operation is required for the engaging block 102.

[0061] The opening rotating tube unit 2 further includes a head accommodating groove 203 provided on the circular tube body 201 and used to be snapped into the cylinder a after the circular tube body 201 rotates and opens.

[0062] In this embodiment, in order to leave enough space for the needle c for injection operation, the circular tube 201 must rotate through an obtuse angle, and there are at least two points in the structure that match it:

[0063] First, the standby position of the engaging block 102 and the opening slot of the syringe span an angle greater than 90°;

[0064] Second, after the end receiving groove 203 is opened, it is used to receive the cylinder a.

[0065] Finally, the end receiving groove 203 and the end 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 body a, and the latter is used to remove the connecting tube b and the needle c.

[0066] The protruding block unit 4 further includes a sliding inclined surface 404 disposed on the rotation terminal end block body 402 and used for receiving the lower surface of the sliding engaging block 102 .

[0067] In this embodiment, the open use state of the protective syringe requires the locking block 102 to pass over the rotation terminal end block 402, and vice versa, it is required that the locking block 102 is relatively difficult to slide out of the syringe open state slot. Therefore, the sliding inclined surface 404 faces the sliding forward direction of the locking block 102 and away from the side of the syringe open state slot, which ultimately makes the circular tube 201 relatively easy to rotate open and relatively difficult to rotate back. After all, it is required to be fast when rotating to open for use, and it can be operated slowly with great force when rotating back for disposal.

[0068] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various modifications can be made within the knowledge of ordinary technicians in the technical field without departing from the purpose of the present invention. These are all non-creative modifications and are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A protective syringe with precise positioning, comprising a barrel (a), a connecting tube (b), and a needle (c), characterized in that: It further includes a fixed shaft body unit (1) arranged on the connecting pipe (b), an open rotary pipe unit (2) sleeved on the connecting pipe (b) and the needle (c), a mounting hole unit (3) arranged on the open rotary pipe unit (2) and used for inserting the fixed shaft body unit (1), and a protruding block unit (4) arranged on the mounting hole unit (3) and used for engaging with the fixed shaft body unit (1) in the rotating direction of the open rotary pipe unit (2). The fixed shaft body unit (1) includes a cylinder (101) arranged on the connecting pipe (b), and an engaging block (102) arranged on the cylinder (101) and used for engaging with the protruding block unit (4). The open rotary pipe unit (2) includes a circular pipe body (201) sleeved on the connecting pipe (b) and the needle (c), and an end opening groove (202) arranged on the circular pipe body (201) and used for outwardly rotating and removing the connecting pipe (b) and the needle (c). The mounting hole unit (3) includes a circular hole (301) arranged on the circular pipe body (201) and used for inserting and mounting the cylinder (101) and the engaging block (102). The protruding block unit (4) includes a middle block body (401) arranged on the circular hole (301), a rotating end block body (402) arranged on the circular hole (301) and forming a syringe open state card slot with the middle block body (401), and a rotating start end block body (403) arranged on the circular hole (301) and forming a syringe scrapped state card slot with the middle block body (401). The open rotary pipe unit (2) further includes an end receiving groove (203) arranged on the circular pipe body (201) and used for clamping into the cylinder body (a) after the circular pipe body (201) is rotated and opened.

2. The protective syringe with precise positioning according to claim 1, characterized in that: The fixed shaft body unit (1) further includes an end plate (103) arranged on the cylinder (101) and used for limiting and fixing the circular pipe body (201) by engaging with the upper surface of the middle block body (401).

3. The protective syringe with precise positioning according to claim 2, characterized in that: The mounting hole unit (3) further includes a hole upper side groove (302) arranged on the circular hole (301) and used for allowing the end plate (103) to cross over the middle block body (401) by misalignedly receiving the engaging block (102) when inserting and mounting the fixed shaft body unit (1).

4. The protective syringe with precise positioning according to claim 1, characterized in that: The to-be-opened position of the engaging block (102) is located between the syringe open state card slot and the syringe scrapped state card slot.

5. The protective syringe with precise positioning according to claim 1, characterized in that: The protruding block unit (4) further includes a sliding inclined surface (404) arranged on the rotating end block body (402) and used for receiving the lower surface of the sliding engaging block (102).

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