A protective syringe

Abstract

The present invention belongs to the technical field of syringe structure, and in particular, relates to a protective syringe. The present invention achieves the purpose of safer and more orderly use of syringes by using a rotating protective tube unit and a sliding sealing tube unit in combination to replace the ordinary needle cover. The present invention has the following advantages: First, the protective structure of the injection needle is highly stable, and the injection needle is not easy to be exposed; second, the opening and closing operations of the injection needle are only two steps, which is relatively simple and quick, and does not affect the normal injection operation; third, the protective structure of the injection needle is also connected to the syringe body during the injection operation, and is not easy to lose; fourth, the internal composition of the injection needle protective structure itself is reasonable and efficient, the structures are cleverly matched, and the overall use is efficient and safe.

Description

Technical Field

[0001] The invention belongs to the technical field of syringe structures, and in particular relates to a protective syringe. Background Art

[0002] The structure of a syringe mainly includes a syringe barrel and a push rod. The structural types of the syringe barrel can be simply summarized into two types, namely, integral type and split type. The difference between the two is whether the injection needle can be removed from the syringe barrel body.

[0003] The existing integrated syringe mainly includes a circular barrel, a conical tube, a needle and a needle cover. The simple syringe of this structural style will have the following problems during use: first, the needle cover is simply put on the conical tube, so it is relatively easy to fall off, and the needle is directly exposed, which is very dangerous, and the syringe cannot be used again; second, during the use of the syringe, the needle cover needs to be removed completely, which is easy to lose. The syringe without the needle cover needs to be additionally cut off during the medical device disposal stage, which is time-consuming and labor-intensive, and is not very safe.

[0004] Therefore, in summary, there is an urgent need to improve the simple needle cover to ensure that its use is safer and more convenient without significantly affecting the normal injection operation.

[0005] A Chinese utility model patent with patent publication number CN 213374427U and publication date 2021.06.08 discloses a new type of anti-infection hyaluronic acid injection syringe, including an injection syringe, an easy-puncture part, a needle mounting sleeve, an injection needle and a sealing plate. The bottom of the left and right outer walls of the injection syringe are both provided with easy-puncture parts, the bottom of the piston rod is connected to a piston mechanism matching the injection syringe, and a limiting mechanism is provided on the right side of the pressing plate.

[0006] However, the injection syringe in this utility model patent relies on a tightening rubber sleeve to reinforce the needle sheath and the needle mounting tube, which ensures a certain anti-falling effect of the needle sheath. However, when used for injection, the entire removed needle sheath is still easy to be lost, which brings a great risk of cross-infection to the subsequent waste disposal operation. Summary of the invention

[0007] The present invention provides a protective syringe, which can achieve the purpose of safer and more orderly use of the syringe by using a rotating protective tube unit and a sliding sealing tube unit in combination to replace a common needle cover.

[0008] The technical solution adopted by the present invention to solve the above problems is: a protective syringe, comprising a rotating protection tube unit hingedly arranged on a needle mounting tube, and a sliding sealing tube unit arranged in the rotating protection tube unit and used for sealing and protecting the injection needle.

[0009] A further preferred technical solution is that the rotating protection tube unit includes a circular tube body, a hinged mounting hole arranged at one end of the circular tube body, and a needle slot opened inward from the hinged end of the circular tube body and used to remove the injection needle.

[0010] A further preferred technical solution is that the sliding sealing tube unit comprises a sealing circular tube arranged in the circular tube body and clamped on the needle mounting tube, and a sealing plate arranged in the sealing circular tube.

[0011] A further preferred technical solution is that the sliding sealing tube unit also includes an annular limit block arranged on the outer annular surface of the circular tube body and close to one side of the hinged mounting hole; the rotating protection tube unit also includes a sliding groove arranged on the circular tube body and used to engage the annular limit block.

[0012] A further preferred technical solution is that the rotation protection tube unit further includes an initial state baffle plate which is arranged in the sliding groove and is used to block the annular limit block.

[0013] A further preferred technical solution is that the rotating protection tube unit further includes a receiving groove provided on the circular tube body and used for receiving the syringe body when the circular tube body has been rotated open.

[0014] A further preferred technical solution is that the sliding sealing tube unit also includes an opening toggle plate arranged on the outer annular surface of the sealing circular tube and located in the needle slot.

[0015] A further preferred technical solution is that the sliding sealing tube unit also includes an opening limit block which is arranged on the outer annular surface of the sealing circular tube and is located in the sliding groove and is used to be stuck on the end surface of the circular tube body after the sealing circular tube is pulled out.

[0016] A further preferred technical solution is that: the rotating protection tube unit also includes an opening groove arranged on the circular tube body at one end away from the hinged mounting hole; the sliding sealing tube unit also includes an opening raised strip arranged on the outer annular surface of the sealing circular tube and located in the opening groove.

[0017] A further preferred technical solution is that the sealing plate is arranged on the inner side of the opening raised strip.

[0018] The present invention has the following advantages: first, the protective structure of the injection needle is highly stable, and the injection needle is not easily exposed; second, the opening and closing operations of the injection needle are both performed in two steps, which is relatively simple and quick, and does not affect the normal injection operation; third, the protective structure of the injection needle is also connected to the syringe body during the injection operation, and is not easily lost; fourth, the internal composition of the injection needle protective structure itself is reasonable and efficient, the structures are cleverly matched, and the overall use is efficient and safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure 2 The utility model relates to a syringe main body structure in the prior art.

[0021] Figure 3 It is a schematic structural diagram of the rotating protection tube unit in the present invention.

[0022] Figure 4 It is a schematic diagram of the position structure of the receiving slot in the present invention.

[0023] Figure 5 It is a schematic structural diagram of the sliding sealing tube unit in the present invention.

[0024] In the accompanying drawings, the components represented by each reference numeral are as follows: needle mounting tube a, injection needle b, syringe body c, rotating shaft d, rotating protection tube unit 1, sliding sealing tube unit 2, circular tube body 101, hinged mounting hole 102, needle slot 103, sealing circular tube 201, sealing plate 202, annular limit block 203, sliding groove 104, initial baffle 105, accommodating slot 106, opening toggle plate 204, opening limit block 205, opening notch 107, opening raised strip 206. DETAILED DESCRIPTION

[0025] The following descriptions are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention.

[0026] Example: As attached Figure 1-5 As shown, a protective syringe comprises a rotating protection tube unit 1 hingedly arranged on a needle mounting tube a, and a sliding sealing tube unit 2 arranged in the rotating protection tube unit 1 and used for sealing and protecting an injection needle b.

[0027] In this embodiment, the entire use steps of the protective syringe are: first, pull out the sliding sealing tube unit 2 until the injection needle b is completely exposed; second, rotate the rotating protection tube unit 1, and the rotating protection tube unit 1 and the sliding sealing tube unit 2 are rotated together to form an acute angle with the syringe body c to ensure that the injection needle b is fully exposed to facilitate the injection operation; third, reversely rotate the rotating protection tube unit 1 to reset the rotating protection tube unit 1 and the sliding sealing tube unit 2 together, that is, restore to an angle flush with the syringe body c; fourth, push the sliding sealing tube unit 2 inward to seal the entire injection needle b, and now the protective syringe can safely enter the disposal procedure.

[0028] The rotating protection tube unit 1 and the sliding sealing tube unit 2 together replace the existing common needle sleeve to ensure that: 1. the sealing protection structure on the injection needle b is more stable; 2. it will not separate from the syringe body c; 3. the impact on the normal injection operation is relatively small.

[0029] The rotating protection tube unit 1 comprises a circular tube body 101, a hinged mounting hole 102 arranged at one end of the circular tube body 101, and a needle slot 103 opened inward from the hinged end of the circular tube body 101 and used to remove the injection needle b.

[0030] In this embodiment, the two symmetrical rotation axes d are respectively inserted into the two hinged mounting holes 102, so that the circular tube body 101 already has a basic rotation effect, and the needle slot 103 must also be opened to ensure that the injection needle b can be smoothly rotated and removed.

[0031] It is worth mentioning that when the injection needle b is made of a hard material, the axial groove length of the needle groove 103 must be correspondingly larger, and when the injection needle b is made of a soft material, the axial groove length of the needle groove 103 can be correspondingly smaller to ensure that the injection needle b can be rotated and moved out after bending.

[0032] The sliding sealing tube unit 2 includes a sealing circular tube 201 disposed in the circular tube body 101 and clamped on the needle mounting tube a, and a sealing plate 202 disposed in the sealing circular tube 201 .

[0033] In the prior art, the needle end of the needle mounting tube a is thinner and the syringe end is thicker. Therefore, the sealing circular tube 201 made of TPE material in this embodiment can obtain an elastic sleeve effect on the needle mounting tube a, which is the first fixing structure that allows the injection needle b to be protected by high-strength sealing.

[0034] In addition, the elastic sealing tube 201 also has an elastic clamping effect inside the hinged tube body 101 , so the sealing tube 201 is less likely to fall off, which is the second fixing position of the sealing tube 201 .

[0035] Finally, the sealing plate 202 is used to seal the outer end of the sealing circular tube 201 to ensure that the injection needle b is fully sealed and protected.

[0036] The sliding sealing tube unit 2 also includes an annular limit block 203 arranged on the outer ring surface of the circular tube body 101 and close to one side of the hinged mounting hole 102; the rotating protection tube unit 1 also includes a sliding groove 104 arranged on the circular tube body 101 and used to engage the annular limit block 203.

[0037] In this embodiment, the sealing tube 201 is used for only pulling out and pushing in, so there is no need for rotation, and rotation is harmful to a certain extent. Therefore, the annular limit block 203 is always stuck in the sliding groove 104 to ensure that the sealing tube 201 has stable and reliable pulling out and pushing in operations.

[0038] The rotation protection tube unit 1 further includes an initial state baffle plate 105 which is disposed in the sliding groove 104 and is used to block the annular limit block 203 .

[0039] In this embodiment, the fixed state of the sealing circular tube 201 may not be enough only by relying on the above-mentioned first fixing structure and second fixing position, so the initial state baffle 105 is provided to form an open hole structure between the end of the sliding groove 104 close to the hinged mounting hole 102 and the initial state baffle 105, which is used to clamp and fix the annular limit block 203, and further ensure the stable state of the sealing circular tube 201 when it is fixed and not in use.

[0040] In addition, it should be noted that the entire operation of pulling out and pushing in the sealing tube 201 requires that the annular limit block 203 pass over the inner side of the initial baffle 105, which is completely achievable for the sealing tube 201 made of relatively soft TPE material.

[0041] The rotating protection tube unit 1 further includes a receiving groove 106 disposed on the cylindrical body 101 and used to receive the syringe body c when the cylindrical body 101 has been rotated open.

[0042] In this embodiment, in order to allow the injection needle b to have sufficient space for injection operation, the circular tube body 101 must be rotated at an obtuse angle. Therefore, after the rotation of the circular tube body 101, there is an acute angle between the circular tube body 101 and the syringe body c. Therefore, it is necessary to provide the accommodating groove 106 to ensure that the rotation of the circular tube body 101 will not finally hit the syringe body c.

[0043] In addition, it should be emphasized that the receiving slot 106 is symmetrically arranged with the needle slot 103, so that the circular tube main body area at the hinged mounting hole 102 forms two protruding plate structures, which are convenient to be opened outward to ensure that the hinged mounting hole 102 is more easily and stably put on the rotating shaft d. On the contrary, if the hinged mounting hole 102 is a complete circular tube structure, it will be very laborious to install it with the rotating shaft d, and it is necessary to greatly pull the tube mouth or greatly compress the rotating shaft d.

[0044] Finally, a pair of snap-fit ​​grooves and snap-fit ​​blocks may be provided on the inner annular surface of the hinged mounting hole 102 and the annular surface of the rotating axis d to ensure that the circular tube body 101 has a fixed function in the rotation direction after being rotated open, thereby preventing the circular tube body 101 from being accidentally rotated and retracted after being rotated open.

[0045] The sliding sealing tube unit 2 further includes an opening toggle plate 204 disposed on the outer annular surface of the sealing circular tube 201 and located in the needle slot 103 .

[0046] In this embodiment, the sealing tube 201 has an exposed portion in the needle slot 103. Therefore, when the sealing tube 201 needs to be pulled out, force can be applied to the exposed portion, such as by hand. However, this is also very troublesome. Therefore, the opening toggle plate 204 is provided to quickly perform an outward toggle operation, thereby ensuring that the sealing tube 201 can be pulled out and pushed in more easily and labor-savingly.

[0047] In addition, it should be noted that when the opening toggle plate 204 is pushed outward to the end of the needle slot 103, it is necessary to ensure that the sealing tube 201 has been pulled out in place, that is, the injection needle b cannot touch the sealing tube 201 when it is rotated and moved out.

[0048] The sliding sealing tube unit 2 also includes an opening limit block 205 which is arranged on the outer annular surface of the sealing circular tube 201 and is located in the sliding groove 104 and is used to be stuck on the end surface of the circular tube body 101 after the sealing circular tube 201 is pulled out.

[0049] In this embodiment, after the sealing circular tube 201 is completely pulled out from the circular tube body 101, there is still a risk of retreating, so a retreat limit structure is also required. Therefore, the opening limit block 205 is introduced, which can be stuck on the end face of the circular tube body 101 away from the hinged mounting hole 102, thereby realizing the basic anti-retreat effect of the sealing circular tube 201.

[0050] Therefore, the opening limit block 205 is farther away from the hinged mounting hole 102 than the annular limit block 203, and the opening limit block 205 also needs to pass over the inner side of part of the tube body section of the circular tube main body 101, because for the sake of structural integrity, the sliding groove 104 is not opened all the way to the end face.

[0051] The rotating protection tube unit 1 also includes an opening notch 107 arranged on the circular tube body 101 at one end away from the hinged mounting hole 102; the sliding sealing tube unit 2 also includes an opening raised strip 206 arranged on the outer annular surface of the sealing circular tube 201 and located in the opening notch 107.

[0052] In this embodiment, the opening toggle plate 204 is the first force-applying part for pulling out and pushing in the sealing tube 201, and the opening raised strip 206 is the second force-applying part. The opening raised strip 206 is exposed and raised in the opening groove 107, so by pinching the opening raised strip 206, the sealing tube 201 can be pulled out and pushed in more conveniently and quickly.

[0053] The sealing plate 202 is disposed on the inner side of the opening raised strip 206 .

[0054] In this embodiment, the circular tube body 101 and the sealing circular tube 201 need to ensure that the injection needle b can be smoothly rotated out for use and rotated back in, so the lengths of both are greater than the exposed length of the injection needle b. Therefore, the sealing plate 202 is moved inward a little to improve the structural strength of the sealing circular tube 201.

[0055] In addition, after the sealing plate 202 moves inward to avoid the opening raised strip 206, the inner side of the opening raised strip 206 is empty, which has a larger deformation space. Therefore, the opening raised strip 206 can be pinched more firmly, ensuring that a relatively large pull-out force can be obtained on the sealing tube 201.

[0056] In addition, a conical groove may be provided inside the sealing tube 201, so that the sealing tube 201 has a greater thickness, i.e., structural strength, while ensuring that the injection needle b can be completely accommodated. Furthermore, the injection needle b may be directly inserted into the internal filling material in the sealing tube 201, since the medical-grade TPE material is soft and non-toxic.

[0057] Finally, a protective baffle is provided on the needle mounting tube a to align with the opening toggle plate 204, that is, the protective baffle is closer to the syringe body c than the opening toggle plate 204, so that the probability of accidental opening of the opening toggle plate 204 is reduced.

[0058] 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, characterized in that: The invention comprises a rotating protection tube unit (1) hingedly arranged on a needle mounting tube (a), and a sliding sealing tube unit (2) arranged in the rotating protection tube unit (1) and used for sealing and protecting an injection needle (b). The rotating protective tube unit (1) comprises a circular tube body (101), a hinged mounting hole (102) arranged at one end of the circular tube body (101), and a needle slot (103) opened inward from the hinged end of the circular tube body (101) and used to remove the injection needle (b). The sliding sealing tube unit (2) comprises a sealing circular tube (201) arranged in the circular tube body (101) and clamped on the needle mounting tube (a), and a sealing plate (202) arranged in the sealing circular tube (201). The sliding sealing tube unit (2) further comprises an annular stopper (203) arranged on the outer annular surface of the circular tube body (101) and close to one side of the hinged mounting hole (102); the rotation protection tube unit (1) further comprises a sliding groove (104) arranged on the circular tube body (101) and used for engaging the annular stopper (203). The sliding sealing tube unit (2) further comprises an opening toggle plate (204) which is arranged on the outer annular surface of the sealing circular tube (201) and is located in the needle slot (103).

2. A protective syringe according to claim 1, characterized in that: The rotation protection tube unit (1) further comprises an initial state baffle (105) which is arranged in the sliding groove (104) and is used to block the annular limit block (203).

3. A protective syringe according to claim 1, characterized in that: The rotating protection tube unit (1) further comprises a receiving slot (106) provided on the circular tube body (101) and used for receiving the syringe body (c) when the circular tube body (101) has been rotated open.

4. A protective syringe according to claim 1, characterized in that: The sliding sealing tube unit (2) further comprises an opening limit block (205) which is arranged on the outer annular surface of the sealing circular tube (201) and is located in the sliding groove (104) and is used to be stuck on the end surface of the circular tube body (101) after the sealing circular tube (201) is pulled out.

5. The protective syringe according to claim 1, characterized in that: The rotating protection tube unit (1) further comprises an opening notch (107) arranged on the circular tube body (101) at an end away from the hinged mounting hole (102); the sliding sealing tube unit (2) further comprises an opening protruding strip (206) arranged on the outer annular surface of the sealing circular tube (201) and located in the opening notch (107).

6. A protective syringe according to claim 5, characterized in that: The sealing plate (202) is arranged on the inner side of the opening raised strip (206).

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