A syringe with a rotating protective cover structure

Abstract

The present invention belongs to the technical field of medical instruments, and in particular, relates to a syringe with a rotating protective cover structure. The present invention achieves the purpose of making the syringe safer and more convenient to use by arranging a needle mounting tube, an injection needle, a fixed shaft unit and an opening protective cover unit on the cylinder body. The present invention has the following advantages: first, the sealing protection state of the injection needle by the opening protective cover unit is highly stable, and the injection needle is not easily exposed accidentally; second, after the opening protective cover unit is rotated to expose the injection needle, the injection operation can be performed, which is simple and convenient; third, the opening protective cover unit has a positioning state with sufficient strength when closed and opened, and is not easy to rotate accidentally; fourth, the opening protective cover unit is always connected to the syringe, and is not easy to be lost. When the syringe is discarded, the injection needle can be fully sealed and protected.

Description

Technical Field

[0001] The invention belongs to the technical field of medical appliances, and in particular relates to a syringe with a rotating protective cover structure. Background Art

[0002] A syringe generally refers to the cylindrical main body structure of a drug syringe, which generally consists of a cylinder, a needle mounting tube and an injection needle. The syringe is used together with a push rod and a needle sleeve to complete basic drug injection operations.

[0003] However, the needle cover in the prior art protects the injection needle by relying on its own elasticity and being sheathed on the needle mounting tube, so there is a problem that it is relatively easy to fall off.

[0004] What's more important is that during the injection operation, the needle cover needs to fall off completely, so there is a high possibility of the needle cover being lost. After the needle cover is lost, the syringe becomes very dangerous when it is discarded, or an additional needle cutting operation is required, which is time-consuming, labor-intensive and unsafe.

[0005] Therefore, in summary, there is an urgent need for a new syringe structure that does not require the needle cover to completely fall off the syringe during injection and that ensures simple and quick injection operation.

[0006] A Chinese utility model patent with patent announcement number CN 210057008U and announcement date 2020.02.14 discloses a needle protection device for a medical syringe, comprising a syringe and a needle, the syringe and the needle are detachably connected, a telescopic sleeve is provided on the syringe, and the telescopic sleeve is sleeved on the needle; an opening and closing assembly is provided at the end of the telescopic sleeve, and the opening and closing assembly includes a fixed sleeve, a rotating sleeve and a plurality of movable plates, the fixed sleeve is provided at the end of the telescopic sleeve, and an annular flange is provided inwardly at the end of the fixed sleeve, and a plurality of movable plates are evenly provided on the flange, the movable plate is fan-shaped, the movable plate is hinged to the flange, and a pull rod is provided on one or more of the movable plates, the rotating sleeve is sleeved on the fixed sleeve, one end of the pull rod is connected to the movable plate, and the other end passes through the side wall of the rotating sleeve.

[0007] However, the needle protection device in this utility model patent is still installed in a sleeve-type manner, and the specific telescopic sleeve structure still needs to be completely removed during the injection operation. Therefore, once the telescopic sleeve structure is lost, the needle is directly exposed, and the subsequent disposal operation is very dangerous. Summary of the invention

[0008] The present invention provides a syringe with a rotating protective cover structure, which can achieve the purpose of making the syringe safer and more convenient to use by arranging a needle mounting tube, an injection needle, a fixed shaft unit and an opening protective cover unit on a cylinder body.

[0009] The technical solution adopted by the present invention to solve the above-mentioned problem is: a syringe with a rotating protective cover structure, including a cylindrical body, a needle mounting tube, and an injection needle, and also including a fixed shaft unit arranged on the needle mounting tube, and an opening protective cover unit for sealing and protecting the injection needle by sleeve-engaging the slotted shaft unit.

[0010] A further preferred technical solution is that the fixed shaft unit includes a fixed cylinder arranged on the needle mounting tube, and a protruding block arranged on the fixed cylinder and used for engaging the opening protection cover unit.

[0011] A further preferred technical solution is that the opening protection cover unit includes a circular tube body for covering and protecting the injection needle, a circular hole arranged on the circular tube body and used to insert the fixed cylinder, an annular limit block arranged on the circular hole and used to engage the protruding block, and a slot for the needle head arranged on the circular tube body and used to rotate outward to remove the needle mounting tube and the injection needle.

[0012] A further preferred technical solution is that: the fixed shaft unit also includes an axial limit plate arranged on the fixed cylindrical annular surface; the opening protection cover unit also includes an arc-shaped support plate arranged on the circular hole and used to be clamped on the inner side of the axial limit plate.

[0013] A further preferred technical solution is that an open notch for engaging the protruding block is formed between the annular limit block and the arc-shaped support plate.

[0014] A further preferred technical solution is that the fixed shaft unit further includes a column slot provided on the fixed cylinder and used for providing a retreat space for the protruding block.

[0015] A further preferred technical solution is that the opening protection cover unit also includes an enlarged groove arranged on the circular hole and used to provide a dislocation space for the installation action between the axial limit plate and the arc support plate.

[0016] A further preferred technical solution is that: the opening protection cover unit also includes an arc-shaped notch arranged on the sleeve end of the circular tube body; the fixed shaft unit also includes a limiting column arranged on the needle mounting tube and used to engage the arc-shaped notch.

[0017] A further preferred technical solution is that the opening protection cover unit also includes a scrapping opening arranged on the sleeve end of the circular tube body.

[0018] A further preferred technical solution is that the opening protection cover unit also includes an opening groove which is arranged on the sleeve end of the circular tube body and is symmetrical to the needle groove and is used to accommodate the opening groove of the cylindrical body.

[0019] The present invention has the following advantages: first, the sealing protection state of the injection needle by the opening protection cover unit is highly stable, and the injection needle is not easily exposed accidentally; second, after the opening protection cover unit is rotated to expose the injection needle, the injection operation can be carried out, which is simple and convenient; third, the opening protection cover unit has a positioning state with sufficient strength when it is closed and opened, and is not easily rotated accidentally; fourth, the opening protection cover unit is always connected to the syringe and is not easily lost, and the injection needle can be fully sealed and protected when the syringe is discarded. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the syringe in the present invention in the standby or used state.

[0021] Figure 2 It is a schematic diagram of the state of the syringe during the injection operation in the present invention.

[0022] Figure 3 It is a schematic diagram of the sleeve engagement structure of the fixed shaft unit and the open protective cover unit in the present invention.

[0023] Figure 4 It is a schematic diagram of the position structure of the fixed axis unit in the present invention.

[0024] Figure 5 It is a schematic structural diagram of the opening protection cover unit in the present invention.

[0025] Figure 6 It is a schematic diagram of the position structure of the slot for the needle in the present invention.

[0026] Figure 7 Schematic diagram of the discarding method of the syringe in the present invention, wherein the injection needle 3 has been bent.

[0027] In the accompanying drawings, the components represented by each reference numeral are as follows: cylindrical body 1, needle mounting tube 2, injection needle 3, fixed shaft unit 4, opening protection cover unit 5, fixed cylinder 401, protruding block 402, circular tube body 501, circular hole 502, annular limit block 503, needle slot 504, axial limit plate 403, arc support plate 505, column slot 404, enlarged slot 506, arc notch 507, limit column 405, scrapping hole 508, opening slot 509. 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 1-7 As shown, a syringe with a rotating protective cover structure includes a cylindrical body 1, a needle mounting tube 2, and an injection needle 3, and also includes a fixed shaft unit 4 arranged on the needle mounting tube 2, and an open protective cover unit 5 for covering and protecting the injection needle 3 by sleeve-engaging the slotted shaft unit 4.

[0030] In this embodiment, the cylindrical body 1, the needle mounting tube 2 and the injection needle 3 are fixedly connected together according to the prior art, and the fixed shaft unit 4 is integrally formed with the needle mounting tube 2.

[0031] The opening protection cover unit 5 is first preset with an opening, and then appropriately opened and put on the two fixed shaft units 4, so as to ensure that the opening protection cover unit 5 has the basic effect of rotatably closing the injection needle 3 and rotatably exposing the injection needle 3.

[0032] In addition, there is a snap-fitting positioning effect between the opening protection cover unit 5 and the fixed shaft unit 4, which ensures that the opening protection cover unit 5 is not easily opened accidentally when closing and protecting the injection needle 3, and the opening protection cover unit 5 is not easily rotated and retracted accidentally when it has been opened for use.

[0033] Of course, it should also be pointed out that the sealing protection effect of the opening protection cover unit 5 on the injection needle 3 is not sealing protection, but covering protection. Therefore, the syringe in this embodiment can be additionally equipped with an outer packaging bag when in use.

[0034] The fixed shaft unit 4 includes a fixed cylinder 401 disposed on the needle mounting tube 2 , and a protruding block 402 disposed on the fixed cylinder 401 and used for engaging with the opening protection cover unit 5 .

[0035] In this embodiment, the fixed cylinder 401 is inserted into the opening protection cover unit 5 of the opening, and can be used as the rotation center of the opening protection cover unit 5. A limit block or a limit groove is further provided in the opening protection cover unit 5, so as to ensure that the limiting effect at the protruding block 402 is effective, that is, the opening protection cover unit 5 is not easy to be accidentally rotated open when it is rotated closed, and is not easy to be rotated back when it has been rotated open, thereby ensuring that the entire injection operation is safe and stable.

[0036] The opening protection cover unit 5 includes a circular tube body 501 for covering and protecting the injection needle 3, a circular hole 502 arranged on the circular tube body 501 and used to insert the fixed cylinder 401, an annular limit block 503 arranged on the circular hole 502 and used to engage the protruding block 402, and a needle slot 504 arranged on the circular tube body 501 and used to rotate outward to remove the needle mounting tube 2 and the injection needle 3.

[0037] In this embodiment, the circular tube body 501 is used to cover, seal and protect the injection needle 3. After the fixed cylinder 401 with a matching diameter is inserted into the circular hole 502, it can be effectively rotated to open and close. The number of the fixed axis units 4 is two, which are symmetrically arranged on the needle mounting tube 2, so the number of the circular holes 502 is also correspondingly two.

[0038] Among them, the annular limit block 503 acts on the protruding block 402. When the protruding block 402 rotates over the annular limit block 503, it indicates that the circular tube body 501 has been rotated into place, that is, rotated through an obtuse angle, ensuring that sufficient injection operation space is exposed at the injection needle 3.

[0039] Next, when the injection needle 3 is made of a rigid material, the needle slot 504 is necessary and the length must be sufficient to ensure that the injection needle 3 can be smoothly moved out of the circular tube body 501. When the injection needle 3 is a "soft needle", the length of the needle slot 504 can be greatly shortened to ensure the integrity of the shape of the circular tube body 501 itself.

[0040] The fixed shaft unit 4 also includes an axial limit plate 403 disposed on the annular surface of the fixed cylinder 401; the opening protection cover unit 5 also includes an arc-shaped support plate 505 disposed on the circular hole 502 and used to clamp the inner side of the axial limit plate 403.

[0041] In this embodiment, the two fixed cylinders 401 form a longer central axis in space, and the circular tube body 501 can rotate around the central axis, but there may still be a certain amount of shaking in the axial direction, which may cause meaningless or even harmful offset shaking of the circular tube body 501 during rotation. Therefore, the axial limit plate 403 is provided so that the axial limit plates 403 are present at both ends of the central axis to press down the structure of the arc support plate 505, thereby ensuring that the rotation movement of the circular tube body 501 is more stable.

[0042] Of course, it should be noted that when the fixed cylinder 401 is assembled with the circular hole 502, the axial limit plate 403 must pass over the arc support plate 505 before it can be stuck on the arc support plate 505 to complete the installation. Therefore, the protruding size of the axial limit plate 403 cannot be too large, otherwise the axial limit plate 403 will easily break directly.

[0043] An open slot for engaging the protruding block 402 is formed between the annular limiting block 503 and the arc-shaped supporting plate 505 .

[0044] In this embodiment, the protruding block 402 passes over the annular limit block 503, which means that the circular tube body 501 has been rotated into place, but it may still be over-rotated at this time, so the arc-shaped support plate 505 is used to block the protruding block 402 to ensure that the protruding block 402 has a unique and definite open state engagement position, namely the open state notch.

[0045] The fixed shaft unit 4 further includes a column slot 404 which is arranged on the fixed cylinder 401 and is used to provide a retreat space for the protruding block 402 .

[0046] In this embodiment, the protruding block 402 needs to go back and forth twice to cross the annular limit block 503, so the column slot 404 is provided so that the protruding block 402 has an appropriate retraction ability, so that the action of the protruding block 402 passing over the annular limit block 503 is relatively labor-saving, avoiding the problem that the circular tube body 501 is difficult to rotate open, or the protruding block 402 is directly stuck.

[0047] The opening protection cover unit 5 further includes an enlarged groove 506 which is arranged on the circular hole 502 and is used to provide a misalignment space for the installation action between the axial limiting plate 403 and the arc-shaped supporting plate 505 .

[0048] In this embodiment, the function of the enlarged groove 506 is to facilitate the installation of the axial limit plate 403 and the arc-shaped support plate 505 in a more convenient and safe manner. If the circular hole 502 is a complete circular hole, the axial limit plate 403 must "straighten" over the arc-shaped support plate 505 to complete the installation. During this process, the axial limit plate 403 and the arc-shaped support plate 505 are prone to getting stuck or cracked.

[0049] Therefore, the enlarged groove 506 is introduced. When the tube body part at the circular hole 502 is opened and put on the fixed cylinder 401, the enlarged groove 506 is used to accommodate the protruding block 402, so that the axial limit plate 403 and the arc-shaped support plate 505 are misaligned, so that the axial limit plate 403 can be relatively "circularly" stuck to the arc-shaped support plate 505, completing the entire installation action of the circular hole 502 and the fixed cylinder 401.

[0050] The opening protection cover unit 5 further includes an arc-shaped notch 507 arranged on the sleeve end of the circular tube body 501 ; the fixed shaft unit 4 further includes a limiting column 405 arranged on the needle mounting tube 2 and used for engaging the arc-shaped notch 507 .

[0051] In this embodiment, the enlarged groove 506 is provided, and therefore the protruding block 402 may accidentally get stuck in the enlarged groove 506 again during normal rotation, causing a rotational misalignment problem of the circular tube body 501. Therefore, with the fixed cylinder 401 as the boundary, a limiting structure is required on the side of the circular tube body 501 away from the circular hole 502 to ensure that the protruding block 402 cannot get stuck in the enlarged groove 506.

[0052] Therefore, the limiting column 405 is introduced, which is always stuck on the arc surface of the arc notch 507 to ensure that the rotation of the circular tube body 501 is more stable.

[0053] In addition, the limiting column 405 is also provided with an inclined surface for engaging with the side of the arc-shaped notch 507 to ensure that the circular tube body 501 is more stable when rotating and closing.

[0054] The opening protection cover unit 5 further includes a discarding opening 508 arranged on the sleeve end of the circular tube body 501 .

[0055] In this embodiment, after the syringe injection operation is completed, the circular tube body 501 rotates and resets to be flush with the cylindrical body 1, and then continues to rotate. At this time, the tube body part of the circular tube body (501) will directly bend the injection needle 3, and the scrap opening 508 will also be put on the limiting column 405, ensuring that after the entire circular tube body 501 rotates in the opposite direction, it has a fixed, difficult-to-reset scrap state, ensuring that the syringe cannot be used a second time, which is very efficient and practical.

[0056] It should also be noted that the arc-shaped support plate 505 also leaves space for the protruding block 402 to rotate in the reverse direction, thereby avoiding the problem that the protruding block 402 is restricted from rotating in the reverse direction or cannot rotate in the reverse direction and is thus scrapped.

[0057] In addition, the width of the needle slot 504 is smaller than the diameter of the needle mounting tube 2, so the tube body portion of the circular tube main body 501 on both sides of the needle slot 504 needs to be appropriately expanded to pass over the needle mounting tube 2 to ensure that the injection needle 3 is fully exposed.

[0058] During this process, if there is no scrapping opening 508, it will be difficult for the entire tube body portion of the circular tube main body 501 originally at the scrapping opening 508 to provide a relatively large deformation amount, and there will be a problem that the tube body portion of the circular tube main body 501 on both sides of the needle slot 504 is directly stuck on the needle mounting tube 2 and cannot move.

[0059] The above is the second function of the scrapping opening 508.

[0060] The opening protection cover unit 5 further includes an opening slot 509 which is arranged on the sleeve end of the circular tube body 501 and is symmetrical with the needle slot 504 and is used to receive the cylindrical body 1 .

[0061] In this embodiment, when the syringe is performing an injection operation, the circular tube body 501 needs to rotate an obtuse angle of 120-150°. Therefore, if there is no opening groove 509, the annular end surface of the circular tube body 501 will directly abut against the cylinder body 1 and cannot rotate to such a relatively large angle.

[0062] In addition, more importantly, the opening slot 509 and the needle slot 504 are arranged relative to each other, so that the tube body part at the circular hole 502 forms a protruding structure, ensuring that the protruding part has relatively large elasticity, which is convenient for being pried apart and then sleeved with the fixed cylinder 401, ultimately ensuring that the installation and use operations of the entire opening protection cover unit 5 are effective and stable.

[0063] Finally, when the syringe is scrapped, the bent injection needle 3 is pushed against the side of the opening groove 509 .

[0064] 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 syringe with a rotating protective cover structure, comprising a cylindrical body (1), a needle mounting tube (2), and an injection needle (3), characterized in that: It also includes a fixed shaft unit (4) arranged on the needle mounting tube (2), and an opening protection cover unit (5) which is used to cover and protect the injection needle (3) by sleeve-engaging the fixed shaft unit (4). The fixed shaft unit (4) comprises a fixed cylinder (401) arranged on the needle mounting tube (2), and a protruding block (402) arranged on the fixed cylinder (401) and used for engaging the opening protection cover unit (5). The opening protection cover unit (5) comprises a circular tube body (501) for covering and protecting the injection needle (3), a circular hole (502) arranged on the circular tube body (501) and used to insert the fixing cylinder (401), an annular limit block (503) arranged on the circular hole (502) and used to engage the protruding block (402), and a needle slot (504) arranged on the circular tube body (501) and used to rotate outward to remove the needle mounting tube (2) and the injection needle (3). The fixed shaft unit (4) further comprises an axial limit plate (403) arranged on the annular surface of the fixed cylinder (401); the opening protection cover unit (5) further comprises an arc-shaped support plate (505) arranged on the circular hole (502) and used for clamping the inner side of the axial limit plate (403). The fixed shaft unit (4) further comprises a column slot (404) arranged on the fixed cylinder (401) and used to provide a retreat space for the protruding block (402).

2. The syringe with a rotating protective cover structure according to claim 1, characterized in that: An open-state notch for engaging the protruding block (402) is formed between the annular limiting block (503) and the arc-shaped supporting plate (505).

3. The syringe with a rotating protective cover structure according to claim 1, characterized in that: The opening protection cover unit (5) further comprises an enlarged groove (506) arranged on the circular hole (502) and used to provide a misalignment space for the installation action between the axial limit plate (403) and the arc-shaped support plate (505).

4. The syringe with a rotating protective cover structure according to claim 1, characterized in that: The opening protection cover unit (5) further comprises an arc-shaped notch (507) arranged on the sleeve end of the circular tube body (501); the fixed shaft unit (4) further comprises a limiting column (405) arranged on the needle mounting tube (2) and used for engaging the arc-shaped notch (507).

5. The syringe with a rotating protective cover structure according to claim 4, characterized in that: The opening protection cover unit (5) further comprises a discarding opening (508) arranged on the sleeve end of the circular tube body (501).

6. The syringe with a rotating protective cover structure according to claim 1, characterized in that: The opening protection cover unit (5) further comprises an opening slot (509) which is arranged on the sleeve end of the circular tube body (501) and is symmetrical with the needle slot (504) and is used to receive the cylindrical body (1).

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