A split-type protective syringe device

Abstract

The present invention belongs to the technical field of medical appliances, and particularly relates to a split-type protective syringe device. By providing a fixed shaft unit, a rotating outer tube unit and an inner tube unit on the needle mounting tube, the use of the syringe device is made more efficient, hygienic, stable and convenient. The present invention has the following advantages: First, for the injection needle, there is both a sealing protection effect and a structural protection function, ensuring that the needle is not easily bent or contaminated; Second, for the operation of opening the needle, only the outer circular tube needs to be rotated, and the inner sealing tube is automatically popped off and removed. After use, even if only the outer circular tube is rotated back to its original position, the requirement of covering and scrapping the needle can be achieved. The whole syringe device is fast and safe to use; Third, the rotating outer tube unit has a positioning function both before and after rotation and opening, ensuring that it is not easily accidentally dropped during injection use and not easily accidentally opened during reset and scrapping.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical appliances, and particularly relates to a split-type protective syringe device. Background Art

[0002] The syringe barrel component mainly includes a barrel, a needle mounting tube, a needle, and a needle cap in terms of its structural composition. Among them, there are mainly two requirements for the protection of the needle: 1. Structural protection to prevent it from being easily bent; 2. Sealing protection to prevent it from being contaminated by bacteria and viruses.

[0003] Therefore, for the commonly used rubber tube type needle cap, it has no structural protection function at all, and its sealing protection effect is also insufficient. After all, relying only on the elastic condition of the rubber tube itself to socket with the needle mounting tube, the rubber tube still has a relatively high risk of falling off.

[0004] Therefore, a combined needle cap structure of hard tube protection plus soft ring sealing has emerged, such as the Chinese utility model patent with the patent announcement number CN209237057U and the announcement date of August 13, 2019.

[0005] It discloses a closed syringe, including a needle, a syringe barrel, and a push rod. The needle includes a needle hub and a needle shaft, and further includes a first sealing sleeve and a second sealing sleeve; the first sealing sleeve is sleeved outside the needle shaft, and the first end of the first sealing sleeve moves along the axial direction of the needle hub on the outer wall of the needle hub and drives the second end of the first sealing sleeve to move along the needle shaft; one end of the second sealing sleeve is hermetically connected to the lower end of the push rod, and the other end is hermetically connected to the outer wall of the syringe barrel.

[0006] Although the needle sealing sleeve structure in this utility model patent includes a tube body and a sealing ring, and the overall protection effect is basically effective, the biggest problem that follows is that the installation method of the entire sealing sleeve structure is still a simple socketing, and its falling risk is still relatively high. Moreover, when the syringe is scrapped, it is necessary to pick up the sealing sleeve structure at least to cover the needle, and at this time the sealing sleeve structure is very likely to be lost.

[0007] Therefore, it is necessary to connect the needle sleeve structure with a basic protection effect to the syringe barrel. For example, the Chinese invention patent with the patent publication number CN 107126602A and the publication date of September 5, 2017 discloses a flange cover flipping device for syringe barrel fixation, which includes: a body, a friction member rotatable relative to the body, a fixing frame hinged to the body and accommodating the syringe barrel, and a protective sleeve sleeved outside the syringe barrel, wherein the friction member includes an arc portion, and the center of the arc portion is concentric with the center of the body, and the body rotates relative to the fixing frame in a first direction and is hinged in a second direction.

[0008] However, the flipping device for the syringe in this invention patent lacks a positioning function in the opened state after being opened. Therefore, when the syringe is performing an injection operation, the flipping device is prone to drooping or swinging randomly, which will increase the pain during the injection operation and is very unsafe.

[0009] Moreover, there is also a problem with the sealing effect on the needle tip, where the strength is insufficient, the entire sealing structure is too large, and the sealing protection degree on the needle tip is insufficient.

[0010] Therefore, in summary, there is an urgent need to improve the needle cap structure so that it at least meets the following two requirements: sufficient structure and sealing protection effect, and simple and stable opening and closing operations. Summary of the Invention

[0011] The present invention provides a split-type protective syringe device, which can make the use of the syringe device more efficient, hygienic, stable and convenient by setting a fixed shaft unit, a rotating outer tube unit and an inner tube unit on the needle mounting tube.

[0012] The technical solution adopted by the present invention to solve the above problems is: a split-type protective syringe device, including a barrel, a needle mounting tube, and a needle tip, and further including a fixed shaft unit provided on the needle mounting tube, a rotating outer tube unit hinged on the fixed shaft unit and used for structurally protecting the needle tip, and an inner tube unit sleeved on the needle mounting tube and located inside the rotating outer tube unit and used for sealingly protecting the needle tip. The rotating outer tube unit performs a limiting and fixing operation on the inner tube unit before rotation and a pushing and removing operation on the inner tube unit during rotation.

[0013] A further preferred technical solution lies in: the fixed shaft unit includes a fixed cylinder provided on the needle mounting tube and used for supporting the inner ring surface of the rotating outer tube unit, a rotating shaft body provided on the fixed cylinder and used for hinging the rotating outer tube unit, and a closing card slot and an opening card slot provided on the outer ring surface of the rotating shaft body and respectively used for clamping the rotating outer tube unit before and after rotation.

[0014] A further preferred technical solution lies in: the number of the fixed shaft units is two, and they are in a centrally symmetric positional relationship with respect to the needle mounting tube.

[0015] A further preferred technical solution lies in: the rotating outer tube unit includes a circular tube main body, a mounting hole provided on the circular tube main body and used for inserting the rotating shaft body, a clamping block provided on the side of the mounting hole and used for selectively clamping into the closing card slot or the opening card slot, and a tube body opening provided on the circular tube main body and used for rotating out the inner tube unit and the needle tip.

[0016] A further preferred technical solution is that: the rotating outer tube unit further includes a breakable strip with two ends respectively arranged on both sides of the opening of the tube body and used for limiting and fixing the inner tube unit.

[0017] A further preferred technical solution is that: the rotating outer tube unit further includes an end slot arranged on the circular tube body and accommodating the cylinder body after the circular tube body is rotated and opened.

[0018] A further preferred technical solution is that: the rotating outer tube unit further includes a deformation opening arranged on the circular tube body and used for providing a retraction space for the engaging block.

[0019] A further preferred technical solution is that: the inner tube unit includes a soft tube body arranged inside the circular tube body with one end closed and used for sleeving on the needle mounting tube, a hard tube body arranged on the outer circumferential surface of the soft tube body, and a protruding block arranged on the hard tube body and used for receiving the pushing action of the side of the end of the opening of the tube body.

[0020] A further preferred technical solution is that: the inner tube unit further includes an installation alignment groove arranged on the soft tube body, the hard tube body and the protruding block; the rotating outer tube unit further includes a positioning block arranged on the inner circumferential surface of the circular tube body and used for engaging and docking with the installation alignment groove.

[0021] A further preferred technical solution is that: on the circular edge of the cylinder body close to the rotating outer tube unit, there is an arc-shaped cut for passing through the two end corners on both sides of the end slot.

[0022] The present invention has the following advantages:

[0023] First, for the injection needle, there is both a sealing and protective effect and a structural protection function, ensuring that the needle is not easily bent and not easily contaminated.

[0024] Second, for the operation of opening the needle, only the external circular tube needs to be rotated, and the internal sealing tube will be automatically popped off. After use, even if only the external circular tube is rotated back to its original position, it can meet the requirement of covering the needle and scrapping it. The whole syringe device is fast and safe to use.

[0025] Third, the rotating outer tube unit has a positioning function both before and after rotation and opening, ensuring that it is not easily accidentally dropped during injection use and not easily accidentally opened during reset and scrapping.

[0026] Fourth, the structural combination between the rotating outer tube unit and the inner tube unit is ingenious and efficient. The action of popping open the sealing tube is fast and thorough, and the rotation angle of the external circular tube is sufficient, ensuring enough space for injection operation. Brief Description of the Drawings

[0027] Figure 1This is a schematic structural diagram of the present invention.

[0028] Figure 2 This is a schematic position structure diagram of the fixed shaft unit in the present invention.

[0029] Figure 3 This is a schematic structural diagram of the rotating outer tube unit in the present invention.

[0030] Figure 4 This is a schematic position structure diagram of the end slot in the present invention.

[0031] Figure 5 This is an exploded view of the inner tube unit in the present invention.

[0032] In the attached drawings, the components represented by each reference numeral are as follows: cylinder body a, needle mounting tube b, needle head c, fixed shaft unit 1, rotating outer tube unit 2, inner tube unit 3, fixed cylinder 101, rotating shaft body 102, closing card slot 103, opening card slot 104, circular tube main body 201, mounting hole 202, engaging block 203, tube body opening 204, strip to be broken 205, end slot 206, deformation opening 207, soft tube body 301, hard tube body 302, protruding block 303, mounting alignment slot 304, positioning block 208, arc-shaped incision 4. Detailed implementation manners

[0033] The following only describes the preferred embodiments of the present invention and does not limit the scope of the present invention.

[0034] Embodiment: As shown in the attached Figures 1-5 figures, a split-type protective syringe device includes a cylinder body a, a needle mounting tube b, and a needle head c, and further includes a fixed shaft unit 1 provided on the needle mounting tube b, a rotating outer tube unit 2 hinged on the fixed shaft unit 1 and used for structurally protecting the needle head c, and an inner tube unit 3 sleeved on the needle mounting tube b and located inside the rotating outer tube unit 2 and used for hermetically protecting the needle head c. The rotating outer tube unit 2 performs a limiting and fixing operation on the inner tube unit 3 before rotation and a pushing and removing operation on the inner tube unit 3 during rotation.

[0035] In this embodiment, the rotating outer tube unit 2 is flush with the cylinder body a both before and after the use of the syringe device, and forms an acute angle with the cylinder body a during use, which means that the rotation opening angle of the rotating outer tube unit 2 is an obtuse angle, ensuring that there is sufficient injection operation space at the needle head c.

[0036] Secondly, the material of the inner tube unit 3 needs to be a combination of soft and hard. The soft part is used to clamp the needle installation tube b inward and the rotary outer tube unit 2 outward, preventing the inner tube unit 3 from slipping easily. Its hard part is used to receive the driving force of the rotary outer tube unit 2, ensuring that the inner tube unit 3 can be quickly bounced off and dropped, enabling the two tube body protection structures to be "opened in one step", which is very important in the critical moment of medical rescue.

[0037] Finally, the general usage method of the entire syringe device is as follows:

[0038] First, rotate the rotary outer tube unit 2. At the same time, the inner tube unit 3 can be bounced off, exposing the needle c. Then continue to rotate until the rotary outer tube unit 2 faces backward, that is, after rotating within a range greater than 90°, it rotates into place. Then perform the injection operation. After the injection operation is completed, finally rotate the rotary outer tube unit 2 in the reverse direction to reset it so that it is still flush with the cylinder body a. In this way, the entire usage operation is completed.

[0039] It should be noted that before the rotary outer tube unit 2 rotates and resets, the inner tube unit 3 may or may not be sleeved on the needle installation tube b again. If it is sleeved, the rotary outer tube unit 2 can still rotate and reset, which does not affect it. The safety of the scrapping operation is higher. If it is not sleeved, the needle c is also protected by the structure at the rotary outer tube unit 2, and at least it will not prick the hand.

[0040] The fixed shaft unit 1 includes a fixed cylinder 101 provided on the needle installation tube b and used to support the inner ring surface of the rotary outer tube unit 2, a rotary shaft body 102 provided on the fixed cylinder 101 and used to hinge the rotary outer tube unit 2, and a closing card slot 103 and an opening card slot 104 provided on the outer ring surface of the rotary shaft body 102 and used to engage the rotary outer tube unit 2 before and after rotation respectively.

[0041] In this embodiment, when the rotary outer tube unit 2 is stuck on the closing card slot 103, it corresponds to its two states of being to be used and having been used. When it is stuck on the opening card slot 104, the rotary outer tube unit 2 has rotated completely. Therefore, the included angle between the center lines of the closing card slot 103 and the opening card slot 104 is also greater than 90°.

[0042] In addition, the fixed cylinder 101 is thicker than the rotary shaft body 102 to form a boss for supporting and limiting the rotary outer tube unit 2, preventing the rotary outer tube unit 2 from loosening left and right unnecessarily.

[0043] The number of the fixed shaft units 1 is two, and they are in a centrosymmetric positional relationship with respect to the needle installation tube b.

[0044] In this embodiment, the two fixed cylinders 101 together form a complete cylindrical shape in space, that is, the two rotating shafts 102 are also a complete fixed shaft, ensuring that the rotation of the entire rotating outer tube unit 2 is more accurate and stable.

[0045] The rotating outer tube unit 2 includes a circular tube main body 201, a mounting hole 202 provided on the circular tube main body 201 and used for inserting the rotating shaft 102, a engaging block 203 provided on the side of the mounting hole 202 and used for selectively engaging with the closing slot 103 or the opening slot 104, and a tube body opening 204 provided on the circular tube main body 201 and used for rotating and removing the inner tube unit 3 and the needle c.

[0046] In this embodiment, the tube body opening 204 needs to rotate and remove the inner tube unit 3, so it needs to be set relatively wide and long. The two mounting holes 202 correspond to the two rotating shafts 102. Finally, the engaging block 203 moves from the closing slot 103 to the opening slot 104 first, and then back from the opening slot 104 to the closing slot 103.

[0047] In addition, the shape of the mounting hole 202 is rectangular, and the engaging block 203 is provided on one long side of the rectangle. The other long side of the rectangle is always in close contact with and clamped on the annular surface of the rotating shaft 102 to ensure the stability of the rotation of the circular tube main body 201.

[0048] The rotating outer tube unit 2 further includes a to-be-broken strip 205 whose two ends are respectively arranged on both sides of the tube body opening 204 and used for limiting and fixing the inner tube unit 3.

[0049] In this embodiment, the to-be-broken strip 205 can clamp the inner tube unit 3 inward, or a protrusion can be provided on the outer ring surface of the inner tube unit 3 to be "constrained" and limited by the to-be-broken strip 205, ensuring that the inner tube unit 3 is at least not likely to accidentally fall off the circular tube main body 201.

[0050] At the initial stage of the rotation of the circular tube main body 201, the to-be-broken strip 205 must be "broken" by the inner tube unit 3. Therefore, the to-be-broken strip 205 needs to be set relatively thin, and its breaking position can be somewhere in the middle or at the connection end with the side of the tube body opening 204.

[0051] The rotating outer tube unit 2 further includes an end head groove 206 provided on the circular tube main body 201 and used for accommodating the cylinder a after the circular tube main body 201 is rotated and opened.

[0052] In this embodiment, without the end slot 206, the circular tube body 201 can rotate at most 90°, which is very disadvantageous for the injection operation. When the cylinder a is snapped into the end slot 206, it proves that the circular tube body 201 has rotated at least 90°.

[0053] The rotating outer tube unit 2 further includes a deformation opening 207 provided on the circular tube body 201 and used to provide a retraction space for the engaging block 203.

[0054] In this embodiment, when the engaging block 203 moves back and forth between the closing card slot 103 and the opening card slot 104, it will surely pass through the annular surface of the rotating shaft body 102. If the hardness at the installation hole 202 is high and the resilience is small, the engaging block 203 is likely to break directly.

[0055] Therefore, the deformation opening 207 is provided to enable the engaging block 203 to have a larger safe deformation amount, ensuring safe back-and-forth sliding between the closing card slot 103 and the opening card slot 104.

[0056] The inner tube unit 3 includes a soft tube body 301 provided inside the circular tube body 201 with one end closed and used to sleeve on the needle installation tube b, a hard tube body 302 provided on the outer ring surface of the soft tube body 301, and a protruding block 303 provided on the hard tube body 302 and used to receive the pushing action of the side of the end of the tube opening 204.

[0057] In this embodiment, a part of the outer ring surface of the soft tube body 301 is grooved for clamping and fixedly installing the hard tube body 302, and the soft tube body 301 elastically clamps the needle installation tube b inward and the circular tube body 201 outward, ensuring that the inner tube unit 3 is not easily dropped before the event.

[0058] Secondly, the protruding block 303 is at the front end in the rotation direction of the side of the end of the tube opening 204. After the circular tube body 201 starts to rotate, it first "breaks" the strip to be broken 205, and then at least completely moves the closed end of the soft tube body 301 out of the tube opening 204. Finally, the side of the end of the tube opening 204 pushes the protruding block 303, and the inner tube unit 3 can be completely popped open with a "pop", and at this time the needle c is smoothly fully opened and exposed.

[0059] In addition, the protruding block 303 is the part where the strip to be broken 205 "constrains" the inner tube unit 3, ensuring that the inner tube unit 3 is even less likely to drop.

[0060] The inner tube unit 3 also includes an installation alignment groove 304 arranged on the soft tube body 301, the hard tube body 302 and the protruding block 303; the rotating outer tube unit 2 also includes a positioning block 208 arranged on the inner annular surface of the circular tube body 201 and used for engaging with the installation alignment groove 304.

[0061] In this embodiment, the inner tube unit 3 is installed as follows: its sealing end is inserted into the opening of the hinge of the circular tube body 201, and the positioning block 208 is aligned with the installation alignment groove 304 until the protruding block 303 passes over a partial pipe section of the circular tube body 201 inside, and is then blocked and fixed by the strip 205 to be broken.

[0062] In addition, the size of the protruding block 303 should not be too small, otherwise it will be directly broken by the side of the end of the tube opening 204 instead of being pushed, bent, and accumulated force, and finally popping open the inner tube unit 3.

[0063] However, the larger protruding block 303 has the problem of being structurally stable and not being easily bent and force-accumulating. Therefore, in this embodiment, the installation alignment groove 304 is provided to divide the protruding block 303 into two parts, ensuring that the two partitions of the protruding block 303 can be pushed, bent, and force-accumulating, and the bending amplitude can be reduced by about half. After all, there are two forces to push and bounce the inner tube unit 3, which is very clever.

[0064] On the circular edge of the cylinder a close to the rotating outer tube unit 2, an arc-shaped cutout 4 for passing through the end corners on both sides of the end slot 206 is provided.

[0065] In this embodiment, the outer end corners on both sides of the end slot 206 also need to rotate around the rotating shaft 102, so they will interfere with the cylinder a on the rotation path. Therefore, a partial arc-shaped cutout 4 is provided to ensure that the end corners are safely staggered with the cylinder a and the rotating outer tube unit 2 is effectively rotated completely.

[0066] 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 split-type protective syringe device, comprising a barrel (a), a needle mounting tube (b), and a needle head (c), characterized in that: It further includes a fixed shaft unit (1) arranged on the needle mounting tube (b), a rotating outer tube unit (2) hinged on the fixed shaft unit (1) and used for structurally protecting the needle head (c), and an inner tube unit (3) sleeved on the needle mounting tube (b) and located inside the rotating outer tube unit (2) and used for hermetically protecting the needle head (c). The rotating outer tube unit (2) performs a limiting and fixing operation on the inner tube unit (3) before rotation and a pushing and removing operation on the inner tube unit (3) during rotation. The fixed shaft unit (1) includes a fixed cylinder body (101) arranged on the needle mounting tube (b) and used for supporting the inner ring surface of the rotating outer tube unit (2), a rotating shaft body (102) arranged on the fixed cylinder body (101) and used for hinging the rotating outer tube unit (2), and a closing card slot (103) and an opening card slot (104) arranged on the outer ring surface of the rotating shaft body (102) and respectively used for clamping the rotating outer tube unit (2) before and after rotation. The rotating outer tube unit (2) includes a circular tube main body (201), a mounting hole (202) arranged on the circular tube main body (201) and used for inserting the rotating shaft body (102), a clamping block (203) arranged on the side surface of the mounting hole (202) and used for selectively clamping into the closing card slot (103) or the opening card slot (104), and a tube body opening (204) arranged on the circular tube main body (201) and used for rotating and removing the inner tube unit (3) and the needle head (c). The shape of the mounting hole (202) is rectangular, and the clamping block (203) is arranged on one long side of the rectangle, and the other long side of the rectangle is always tightly attached and clamped on the annular surface of the rotating shaft body (102) to ensure the stability of the rotation action of the circular tube main body (201).

2. The split-type protective syringe device according to claim 1, characterized in that: The number of the fixed shaft units (1) is two, and they are in a centrally symmetric positional relationship with respect to the needle mounting tube (b).

3. The split-type protective syringe device according to claim 1, characterized in that: The rotating outer tube unit (2) further includes a to-be-broken strip (205) with two ends respectively arranged at two sides of the tube body opening (204) and used for limiting and fixing the inner tube unit (3).

4. The split-type protective syringe device according to claim 1, characterized in that: The rotating outer tube unit (2) further includes an end slot (206) arranged on the circular tube main body (201) and used for accommodating the cylinder body (a) after the circular tube main body (201) is rotated and opened.

5. The split-type protective syringe device according to claim 1, characterized in that: The rotating outer tube unit (2) further includes a deformation opening (207) arranged on the circular tube main body (201) and used for providing a retraction space for the clamping block (203).

6. The split-type protective syringe device according to claim 1, characterized in that: The inner tube unit (3) includes a soft tube body (301) arranged inside the circular tube main body (201) with one end closed and used for sleeving on the needle mounting tube (b), a hard tube body (302) arranged on the outer ring surface of the soft tube body (301), and a protruding block (303) arranged on the hard tube body (302) and used for receiving the pushing action of the side surface of the end of the tube body opening (204).

7. The split-type protective syringe device according to claim 6, characterized in that: The inner tube unit (3) further includes mounting alignment grooves (304) provided on the flexible tube body (301), the rigid tube body (302), and the protruding block (303); the rotating outer tube unit (2) further includes positioning blocks (208) provided on the inner circumferential surface of the circular tube body (201) and used for snap-fitting and docking with the mounting alignment grooves (304).

8. The split-type protective syringe device according to claim 4, characterized in that: On the circular edge of the cylinder body (a) close to the rotating outer tube unit (2), there is an arc-shaped notch (4) for passing through the two side end corners of the end head groove (206).

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