An integrated protective syringe

Abstract

The present invention belongs to the technical field of medical instruments, and in particular, relates to an integrated protective syringe. The present invention achieves the purpose of safe, efficient and convenient use of the syringe by arranging a needle mounting tube, an injection needle, a locking column unit, a rotating protection tube unit and a sealing tube unit on the syringe body. The present invention has the following advantages: First, when the injection needle is closed, the closed protection structure is not easy to open accidentally; second, when used for injection, only two steps are required to expose and open the injection needle, ensuring that the injection operation is more convenient and quick; third, the entire injection process does not produce useless parts, and after the injection is completed, the injection needle can still obtain the same strength of closed protection effect as before, ensuring that the subsequent disposal is more efficient and safe; fourth, the force required for the rotational opening and closing operation of the syringe is moderate, and the connection between the syringe's own structures is stable and reasonably matched.

Description

Technical Field

[0001] The invention belongs to the technical field of medical appliances, and in particular relates to an integral protective syringe. Background Art

[0002] A syringe generally refers to a drug delivery device, whose structure mainly includes a syringe, a push rod and a needle tube. The general method of use is: the push rod is initially located at the inner end of the syringe. At this time, the needle tube is first removed, and then the push rod is pulled outward to allow the syringe to be filled with medicine. Then the push rod is pushed inward to complete the drug delivery operation. Finally, the needle tube is put back on the injection needle for subsequent proper disposal.

[0003] The syringe of this structure has a relatively simple composition and a relatively traditional method of use, so there are many problems, such as: 1. The injection needle on the syringe is only protected by a relatively thin and soft plastic tube, which is obviously not strong enough. It is very likely that the injection needle will pierce the needle tube accidentally, and if this problem occurs, the entire syringe will become invalid and unusable; 2. The syringe needle tube is prone to falling off before and after use, which is very dangerous, and if it falls before use, the syringe cannot be used anymore; 3. After the syringe is used, if the needle tube is lost, the needle is directly exposed during the entire operation of the syringe being discarded, and specific needle destruction treatment is required later, which is time-consuming and labor-intensive.

[0004] Therefore, in summary, there is an urgent need for a new syringe structure that has high protection strength for the injection needle, simple and convenient injection operation, and is easy to re-seal the injection needle after injection.

[0005] A Chinese invention patent with patent publication number CN 108112236A and publication date 2018.06.01 discloses a safety device for preventing needle stick injuries, the safety device comprising: a protective cover; and a shielding member, the shielding member being pivotable from a storage position, a retracted position and a safety position, wherein the shielding member is interlocked with the protective cover in the storage position, allows access to the needle in the retracted position, and covers the needle in the safety position, wherein the cam surface of the shielding member and the engaging post of the protective cover are arranged so that when the safety device is installed around the tip of the medical device, the shielding member is displaced from the storage position to the retracted position by moving distally to remove the protective cover from the tip.

[0006] However, the needle safety device in this invention patent has at least the following problems: first, the needle protection structure includes too many small parts, such as protective covers, shielding parts and sealing covers, and the needle opening operation is very cumbersome; second, after the injection device is used, the injection needle is only protected by the shielding part, and this protection effect is not all-round, and there are additional small parts such as protective covers and sealing covers, which makes the entire injection operation less orderly and efficient. Summary of the invention

[0007] The present invention provides an integrated protective syringe, which can achieve the purpose of safe, efficient and convenient use of the syringe by arranging a needle installation tube, an injection needle, a clamping column unit, a rotating protective tube unit and a sealing tube unit on the syringe body.

[0008] The technical solution adopted by the present invention to solve the above-mentioned problem is: an integrated protective syringe, including a syringe body, a needle mounting tube, and an injection needle, and also including a locking column unit arranged on the needle mounting tube, a rotating protection tube unit that is sleeved on the needle mounting tube and the injection needle and is sleeved with the locking column unit, and a sealing tube unit that is arranged in the rotating protection tube unit and is used to be sleeved on the injection needle before the rotating protection tube unit rotates.

[0009] A further preferred technical solution is that the engaging column unit includes a fixing column arranged on the needle mounting tube, and a protruding block arranged on the annular surface of the fixing column and used for engaging the rotating protection tube unit.

[0010] A further preferred technical solution is that the rotating protection tube unit includes a circular tube body, a rotating hole arranged on the circular tube body close to one end of the syringe body and used to insert and install the fixing column, an in-hole block arranged in the rotating hole and used to engage the protruding block, and a working slot arranged on the circular tube body and used to rotate outward to remove the needle mounting tube and the injection needle.

[0011] A further preferred technical solution is that the sealing cylinder unit comprises a needle sealing cylinder body which is arranged in the circular tube body and covers the injection needle.

[0012] A further preferred technical solution is that: the locking column unit also includes a protruding plate arranged on the fixed column; the rotation protection tube unit also includes an arc-shaped plate arranged in the rotation hole and used to be clamped on the inner side of the protruding plate, and a positioning groove for opening the protruding block is formed between the block in the hole and the arc-shaped plate.

[0013] A further preferred technical solution is that: the engaging column unit further includes a column slot provided on the fixing column and used to increase the retraction ability of the protruding block; and the rotating protection tube unit further includes an installation retraction groove provided in the rotating hole.

[0014] A further preferred technical solution is that the rotating protection tube unit further includes a receiving groove which is arranged at one end of the circular tube body close to the syringe body and is used to engage with the syringe body after rotation.

[0015] A further preferred technical solution is that the locking column unit further includes a blocking column which is arranged on the needle mounting tube and is used for limiting the position on the arc-shaped end surface of the circular tube body.

[0016] A further preferred technical solution is that the sealing cylinder unit also includes a positioning block arranged at a position of the needle sealing cylinder body close to one end of the syringe body; the rotating protection tube unit also includes a limiting groove arranged on the circular tube body and used to insert and install the positioning block.

[0017] A further preferred technical solution is that: the sealing cylinder unit further includes an open state limiting block arranged on the needle sealing cylinder body and located in the limiting groove; the rotating protection tube unit further includes a fixed state partition arranged in the limiting groove.

[0018] The present invention has the following advantages: first, when the injection needle is closed, the closed protection structure is not easy to be opened accidentally; second, when used for injection, only two steps are required to expose and open the injection needle, ensuring that the injection operation is more convenient and quicker; third, the entire injection process does not produce useless parts, and after the injection is completed, the injection needle can still obtain the same strength of closed protection effect as before, ensuring that the subsequent waste treatment is more efficient and safe; fourth, the force required for the rotary opening and closing operation of the syringe is moderate, and the connection between the syringe's own structures is stable and the matching is reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the idle state when the injection needle of the present invention is closed.

[0020] Figure 2 It is a schematic diagram of the position of the locking column unit in the present invention.

[0021] Figure 3 It is a schematic diagram of the state of the syringe in the present invention when in use.

[0022] Figure 4 It is a schematic structural diagram of the sleeve connection of the locking column unit and the rotating protection tube unit in the present invention.

[0023] Figure 5It is a schematic diagram of the position structure of the locking column unit in the present invention.

[0024] Figure 6 It is a schematic structural diagram of the rotating protection tube unit in the present invention.

[0025] Figure 7 It is a schematic diagram of the position structure of the working slots in the present invention.

[0026] Figure 8 It is a schematic structural diagram of the sealing cylinder unit in the present invention.

[0027] In the accompanying drawings, the components represented by each reference numeral are as follows: syringe body 11, needle mounting tube 12, and injection needle 13, locking column unit 1, rotating protection tube unit 2, sealing cylinder unit 3, fixed column 101, protruding block 102, circular tube body 201, rotating hole 202, inner block 203, working slot 204, needle sealing cylinder 301, protruding plate 103, arc plate 205, opening positioning groove 206, column slot 104, installation retracting groove 207, accommodating slot 208, blocking column 105, positioning block 302, limiting groove 209, open state limiting block 303, fixed state partition 210. DETAILED DESCRIPTION

[0028] The following descriptions are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention.

[0029] Example: As attached Figure 1-8 As shown, an integral protective syringe includes a syringe body 11, a needle mounting tube 12, and an injection needle 13, and also includes a locking column unit 1 arranged on the needle mounting tube 12, a rotating protection tube unit 2 which is sleeved on the needle mounting tube 12 and the injection needle 13 and is sleeved with the locking column unit 1, and a sealing tube unit 3 which is arranged in the rotating protection tube unit 2 and is used to sleeve on the injection needle 13 before the rotating protection tube unit 2 rotates.

[0030] 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 meaning of "protective type" refers to the fact that the locking column unit 1 and the needle mounting tube 12 are integrally formed, the rotating protection tube unit 2 is then locked with the locking column unit 1, and then the sealing cylinder unit 3 is inserted into the rotating protection tube unit 2, and finally the sealing cylinder unit 3 covers the injection needle 13. Therefore, in the entire syringe structure, as long as the above-mentioned locking structure and insertion structure are not easily and accidentally disassembled, the "protective type" function can be guaranteed to be continuously effective.

[0031] In addition, the meaning of "integrated" is that the syringe will not drop useless small parts during the entire use process, and will return to the same structural state before use after use. Therefore, between the locking column unit 1 and the rotating protection tube unit 2, and between the rotating protection tube unit 2 and the sealing cylinder unit 3, only the relative positions change, and no falling off or separation occurs.

[0032] Finally, the general method of using the syringe in this embodiment is as follows.

[0033] First, the sealing cylinder unit 3 is pulled outward until the injection needle 13 is completely exposed, and at this time, the sealing cylinder unit 3 is still stuck on the rotating protection tube unit 2.

[0034] Second, the rotating protection tube unit 2 together with the sealing cylinder unit 3 rotates around the engaging column unit 1 at an obtuse angle, such as 120°-150°, to ensure that there is enough space at the injection needle 13 for normal injection operation.

[0035] Third, after the injection operation is completed, the rotating protection tube unit 2 together with the sealing cylinder unit 3 rotates around the locking column unit 1 again in the opposite direction at the same angle as before, until the rotating protection tube unit 2 is reset on the locking column unit 1.

[0036] The fourth and final step is to push the sealing cylinder unit 3 inward until the sealing cylinder unit 3 is stuck in the initial position. At this point, the entire syringe has been used up and can directly enter the medical device disposal process without having to perform operations such as cutting off the needle.

[0037] The engaging column unit 1 includes a fixing column 101 disposed on the needle mounting tube 12 , and a protruding block 102 disposed on the annular surface of the fixing column 101 and used for engaging with the rotating protection tube unit 2 .

[0038] In this embodiment, the profile of the fixing column 101 is a cylinder to ensure that it has a sufficient annular surface limiting effect with the rotating protection tube unit 2, and a snap-fitting groove is reserved on the rotating protection tube unit 2 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 stuck in the snap-fitting groove, ensuring that the rotating protection tube unit 2 will not accidentally rotate and retract.

[0039] The rotating protection tube unit 2 includes a circular tube body 201, a rotating hole 202 arranged at one end of the circular tube body 201 close to the syringe body 11 and used to insert and install the fixing column 101, an inner block 203 arranged in the rotating hole 202 and used to engage the protruding block 102, and a working slot 204 arranged on the circular tube body 201 and used to rotate and remove the needle mounting tube 12 and the injection needle 13 outward.

[0040] In this embodiment, there are two slotted block units 1, which are symmetrically arranged on the needle mounting tube 12, so the number of the rotating holes 202 is also correspondingly two, and then cooperate with the working slot 204, so that at least the smooth rotation of the circular tube body 201 can be guaranteed, that is, the injection needle 13 is covered before rotation, and the injection needle 13 is smoothly moved out of the working slot 204 after rotation.

[0041] The in-hole block 203 is a limiting structure that the protruding block 102 needs to "cross over", which ensures that the protruding block 102 can cross over the in-hole block 203 under operating force, and in the event of a relatively small accidental touch, the protruding block 102 must not cross over the in-hole block 203 back, that is, the circular tube body 201 is not easy to rotate back accidentally when it is opened.

[0042] Therefore, the size, shape, elasticity and other parameters of the protruding block 102 and the in-hole block 203 are crucial and can only be determined after multiple tests.

[0043] The sealing cylinder unit 3 includes a needle sealing cylinder body 301 which is arranged in the circular tube body 201 and is clamped on the needle mounting tube 12 .

[0044] In this embodiment, the material of the locking column unit 1 can be consistent with the needle mounting tube 12, for example, it can be a medical grade COC material, and the material of the rotating protection tube unit 2 can be, for example, a medical grade PP material, and the material of the needle sealing cylinder 301 can be, for example, a medical grade TPE material.

[0045] In addition, the force that the needle sealing cylinder 301 relies on to stably seal and protect the injection needle 13 can have the following two sources: first, the needle sealing cylinder 301 itself has appropriate elastic force, which can be stuck on the needle mounting tube 12 with one end thin and the other end thick; second, the needle sealing cylinder 301 can be stuck in the circular tube body 201 and be appropriately squeezed inward.

[0046] The locking column unit 1 also includes a protruding plate 103 arranged on the fixed column 101; the rotating protective tube unit 2 also includes an arc-shaped plate 205 arranged in the rotating hole 202 and used to be locked on the inner side of the protruding plate 103, and a positioning groove 206 for opening the protruding block 102 is formed between the in-hole block 203 and the arc-shaped plate 205.

[0047] In this embodiment, the circular tube body 201 needs to be stable during rotation and cannot rock back and forth relative to the two fixed columns 101. Therefore, with the two aligned fixed columns 101 as the axis, the circular tube body 201 requires an axial limit function that does not affect its rotation.

[0048] The arc-shaped protruding plate 103 is pressed on the arc-shaped plate 205, and the above-mentioned two requirements of "not affecting rotation" and "axial limitation" are met at the same time. There is a pair of protruding plates 104 and arc-shaped grooves 205 on both sides of the circular tube body 201, which can ensure that the circular tube body 201 will not shake significantly during rotation.

[0049] In addition, after the protruding block 102 passes over the inner block 203, the circular tube body 201 is in the normal open state. Although it has been rotated into place at this time, there is still a problem of over-rotation, so the arc plate 205 is used to block the rotating protruding block 102, that is, the opening positioning groove 206 is formed, so that the protruding block 102 has a unique and determined opening position. In other words, the width of the arc plate 205 is large, and the protruding block 102 cannot be squeezed onto the arc plate 205.

[0050] The engaging column unit 1 further includes a column slot 104 disposed on the fixing column 101 and used to increase the retraction capability of the protruding block 102 ; the rotating protection tube unit 2 further includes an installation retraction slot 207 disposed in the rotating hole 202 .

[0051] In this embodiment, the protruding block 102 needs to pass over the in-hole block 203, and it needs to pass back and forth twice, so the protruding block 102 and the in-hole block 203 need to undergo appropriate deformation and contraction, but the deformation amount may still be insufficient at this time, so the column slot 104 is introduced to make the protruding block 102 have appropriate retraction ability to ensure that the force required to pass over the in-hole block 203 is appropriate, avoiding the problem that the circular tube body 201 is neither easy to rotate open nor easy to rotate closed.

[0052] In addition, when the rotating protection tube unit 2 is installed with the locking column unit 1, the protruding plate 103 needs to pass over the arc plate 205 outward. At this time, if the rotating hole 202 is a complete circle, the passing action between the protruding plate 103 and the arc plate 205 must be completed by relying on their own deformation, which is likely to squeeze the protruding plate 103 or the arc plate 205 directly off.

[0053] Therefore, the installation retraction groove 207 is introduced so that when the protruding plate 103 passes over the arc plate 205, the rotating hole 202 and the fixing column 101 are properly misaligned, and the protruding block 102 properly enters the installation retraction groove 207, so that the protruding plate 103 can be stuck to the exposed upper surface of the arc plate 205.

[0054] The rotating protection tube unit 2 further includes a receiving groove 208 disposed at one end of the circular tube body 201 close to the syringe body 11 and used to engage with the syringe body 11 after rotation.

[0055] In this embodiment, if the sleeve end of the circular tube body 201 is a complete circular end face, after the circular tube body 201 is rotated to open an obtuse angle, the circular end face may abut against the syringe body 11, causing the problem of rotation failure, so this is the main function of the accommodating groove 208.

[0056] Furthermore, the receiving slot 208 and the working slot 204 are symmetrically arranged, so the circular tube parts respectively provided with the two rotating holes 202 become two "protruding" plate shapes, which are relatively easy to be opened and installed when they are connected with the fixing column 101.

[0057] The locking column unit 1 further includes a blocking column 105 which is arranged on the needle mounting tube 12 and is used for limiting the position on the arc-shaped end surface of the circular tube body 201 .

[0058] In this embodiment, the arc plate 205, the installation retreat groove 207 and the blocking column 105 form a complete "technical chain" for the following reasons:

[0059] First, the circular tube body 201 needs to rotate stably, so the arc plate 205 and the protruding plate 103 are arranged to engage with each other to ensure that the circular tube body 201 does not shake left and right when rotating.

[0060] Then, in order to install the arc plate 205 and the protruding plate 103, the installation retracting groove 207 is opened, but this also brings the problem that the rotating hole 202 is no longer a complete circle. When the protruding block 102 rotates through the installation retracting groove 207, it is easy to shift into the installation retracting groove 207, so that the entire circular tube body 201 shifts upward.

[0061] Therefore, finally, the blocking column 105 is introduced, which is stuck on the outer annular surface of the sleeve end of the circular tube body 201, and finally ensures that the circular tube body 201 does not have a large shaking amplitude left and right, up and down when rotating.

[0062] The sealing cylinder unit 3 further includes a positioning block 302 disposed at one end of the needle sealing cylinder 301 close to the syringe body 11 ; the rotating protection tube unit 2 further includes a limiting groove 209 disposed on the circular tube body 201 and used for inserting and installing the positioning block 302 .

[0063] In this embodiment, the needle sealing cylinder 301 is used as follows: pull it outward to expose the injection needle 13. At this time, the needle sealing cylinder 301 still cannot be separated from the circular tube body 201 to ensure that the entire injection operation has the advantage of not falling small parts. During this process, the positioning block 302 must always be in the limiting groove 209 to ensure that the needle sealing cylinder 301 does not rotate and does not completely move outward and fall.

[0064] The sealing cylinder unit 3 further includes an open state limiting block 303 disposed on the needle sealing cylinder body 301 and located in the limiting groove 209 ; the rotating protection tube unit 2 further includes a fixed state partition plate 210 disposed in the limiting groove 209 .

[0065] In this embodiment, after the needle sealing cylinder 301 has been pulled out to its full position, there is a possibility that it will move back inwards. Therefore, the open state limit block 303 is introduced so that when the needle sealing cylinder 301 is pulled out to its full position, the open state limit block 303 can be pressed against the end surface of the circular tube body 201.

[0066] Correspondingly, the size of the open state limit block 303 cannot be too large, because it needs to pass over a small section of the tube on the inner side of the circular tube body 201.

[0067] Finally, the fixed partition 210 separates a fixed opening in the limiting groove 209 for clamping the positioning block 302, so that the needle sealing cylinder 301 has an initial anti-drop structure on the circular tube body 201. However, correspondingly, when the needle sealing cylinder 301 is opened, the positioning block 302 also needs to pass over the inner side of the fixed partition 210.

[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. An integrated protective syringe, comprising a syringe body (11), a needle mounting tube (12), and an injection needle (13), characterized in that: It also comprises a locking column unit (1) arranged on the needle mounting tube (12), a rotation protection tube unit (2) sleeved on the needle mounting tube (12) and the injection needle (13) and sleeved with the locking column unit (1), and a sealing cylinder unit (3) arranged in the rotation protection tube unit (2) and used to be sleeved on the injection needle (13) before the rotation protection tube unit (2) rotates. The engaging column unit (1) comprises a fixing column (101) arranged on the needle mounting tube (12), and a protruding block (102) arranged on the annular surface of the fixing column (101) and used for engaging the rotating protection tube unit (2). The rotating protection tube unit (2) comprises a circular tube body (201), a rotating hole (202) arranged at one end of the circular tube body (201) close to the syringe body (11) and used for inserting and installing the fixing column (101), an inner hole block (203) arranged in the rotating hole (202) and used for engaging the protruding block (102), and a working slot (204) arranged on the circular tube body (201) and used for rotating and removing the needle mounting tube (12) and the injection needle (13) outward. The sealing cylinder unit (3) comprises a needle sealing cylinder body (301) which is arranged in the cylindrical body (201) and covers the injection needle (13). The locking column unit (1) further comprises a protruding plate (103) arranged on the fixing column (101); the rotation protection tube unit (2) further comprises an arc-shaped plate (205) arranged in the rotation hole (202) and used for locking onto the inner side surface of the protruding plate (103); a positioning groove (206) for opening the protruding block (102) is formed between the in-hole block (203) and the arc-shaped plate (205).

2. The integrated protective syringe according to claim 1, characterized in that: The engaging column unit (1) further comprises a column slot (104) arranged on the fixing column (101) and used to increase the retraction capability of the protruding block (102); the rotating protection tube unit (2) further comprises an installation retraction slot (207) arranged in the rotating hole (202).

3. The integrated protective syringe according to claim 1, characterized in that: The rotating protective tube unit (2) further comprises a receiving slot (208) which is arranged at one end of the circular tube body (201) close to the syringe body (11) and is used to engage with the syringe body (11) after rotation.

4. The integrated protective syringe according to claim 2, characterized in that: The locking column unit (1) further comprises a blocking column (105) which is arranged on the needle mounting tube (12) and is used for limiting the position on the arc-shaped end surface of the circular tube body (201).

5. The integrated protective syringe according to claim 1, characterized in that: The sealing cylinder unit (3) further comprises a positioning block (302) arranged at a position of the needle sealing cylinder body (301) close to one end of the syringe body (11); the rotating protection tube unit (2) further comprises a limiting groove (209) arranged on the circular tube body (201) and used for inserting and installing the positioning block (302).

6. The integrated protective syringe according to claim 5, characterized in that: The sealing cylinder unit (3) further comprises an open state limiting block (303) arranged on the needle sealing cylinder body (301) and located in the limiting groove (209); the rotating protection tube unit (2) further comprises a fixed state partition plate (210) arranged in the limiting groove (209).

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