Safety protection device for syringe

Abstract

The present invention belongs to the technical field of medical devices, and in particular, relates to a safety protection device for syringes. The present invention achieves a more accurate and safe injection operation by arranging a sliding inner tube unit in a fixed outer tube unit, and arranging a syringe clamping frame unit at the rear end of the sliding inner tube unit. The present invention has the following advantages: First, after the syringe is installed on the protective device, it is always parallel to the fixed outer tube unit. As long as the fixed outer tube unit is not deflected, the injection operation is vertically inserted to avoid the pain caused by the deflection of the needle; second, the sliding inner tube unit has a certain sliding distance on the fixed outer tube unit, and the syringes of the same specification can ensure the insertion depth when in use, avoiding the problem of insufficient or excessive depth; third, when the sliding inner tube unit is inserted together with the syringe, it is always stably connected with the fixed outer tube unit to ensure the high stability of the syringe during the injection operation.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a safety protection device for a syringe. Background Art

[0002] The structure of a syringe mainly includes a syringe barrel and a push rod. During the use of a syringe, there are two relatively common accidental risks. The first is that the insertion depth of the injection needle is too large or too small, resulting in an accidental inaccurate drug injection position. The second is that during the injection process, the injection needle deflects, enlarging the shape of the needle hole, causing greater pain to the patient.

[0003] Therefore, in order to address the above two problems, a variety of syringe protection devices have appeared on the market, but their use effects are insufficient to a certain extent.

[0004] For example, a Chinese utility model patent with patent publication number CN213191805U and publication date 2021.05.14 discloses a protective structure for a syringe, including an empty barrel and a protective sleeve. A piston shaft is provided inside the empty barrel, one end of the piston shaft is fixedly connected to a piston, and an annular groove is provided on one side of the outer surface of the empty barrel.

[0005] However, the syringe protection structure in this utility model patent is still prone to harmful problems such as syringe tilting and syringe rotation when protecting the entire injection operation, and the effect of the entire protection structure is still not stable and comprehensive enough.

[0006] For another example, a Chinese utility model patent with patent announcement number CN209378297U and announcement date 2019.09.13 discloses a latch-type lead glass syringe protective sleeve, comprising a lead glass barrel, a protective sleeve end cover, and a protective sleeve pressure cover, wherein the protective sleeve end cover buckles the upper port of the lead glass barrel and is fixedly connected to the lead glass barrel, the protective sleeve pressure cover is arranged above the protective sleeve end cover and is threadedly connected to the protective sleeve end cover, a through hole for inserting the syringe barrel is axially arranged in the lead glass barrel, the cover end surface of the protective sleeve end cover is arranged with an end cover through hole matching the through hole in the lead glass barrel and used to pass through the syringe barrel, and the cover end surface of the protective sleeve pressure cover is arranged with a pressure cover through hole matching the size of the syringe tail and used to pass through the syringe tail.

[0007] However, the syringe protective cover in the utility model patent, which is a whole formed by the syringe barrel, may still tilt during the insertion of the injection needle. More importantly, the protective cover will eventually force the injection needle to be perpendicular to the patient's skin surface, which causes great pain when the injection needle is pulled in the muscle.

[0008] Therefore, in summary, there is an urgent need for a safety protection device that can ensure that the syringe is inserted to a preset depth, is always inserted vertically, and does not rotate. Summary of the invention

[0009] The invention provides a safety protection device for a syringe, which can achieve a more accurate and safe injection operation by arranging a sliding inner tube unit in a fixed outer tube unit and arranging a syringe clamping frame unit at the rear end of the sliding inner tube unit.

[0010] The technical solution adopted by the present invention to solve the above-mentioned problem is: a safety protection device for a syringe, comprising a fixed outer tube unit for pressing on the skin, a sliding inner tube unit inserted on the fixed outer tube unit and used for inserting and installing a syringe, and a syringe clamping frame unit arranged at a position of one end of the sliding inner tube unit away from the skin.

[0011] A further preferred technical solution is that the fixed outer tube unit includes a first tube body, an axial plate arranged at an end of the first tube body away from the skin, and an annular snap-fit ​​block or an axial snap-fit ​​block arranged on the radial inner side surface of the axial plate.

[0012] A further preferred technical solution is that the sliding inner tube unit includes a second tube body, a sliding groove arranged on the second tube body and used to insert the annular locking block, and a completion protruding strip arranged on the outer annular surface of the second tube body away from the skin and used to lock and fix the axial locking block.

[0013] A further preferred technical solution is that the fixed outer tube unit also includes a bending plate arranged at an end of the first tube body away from the skin and used to clamp the second tube body inwardly, and the bending plate is arranged between the two axial clamping blocks.

[0014] A further preferred technical solution is that the sliding inner tube unit also includes a protruding strip for waiting, which is arranged on the outer annular surface of the second tube body on the side close to the skin and is used to block the bending plate.

[0015] A further preferred technical solution is that two ends of the protruding strip for waiting are more indented than two ends of the protruding strip for completion.

[0016] A further preferred technical solution is that the sliding inner tube unit also includes a pair of limit blocks arranged on the outer annular surface of the second tube body close to the skin and used to align and install the annular locking block, and an installation alignment protruding strip arranged on the outer annular surface of the second tube body close to the skin and aligned with the waiting protruding strip.

[0017] A further preferred technical solution is that the sliding inner tube unit also includes an enlarged tube body which is arranged on the end surface of the second tube body close to the skin and is used to radially push up and open the annular engaging block and the bending plate outward.

[0018] A further preferred technical solution is that the syringe clamping frame unit includes a force-applying hole plate arranged at a position on the side of the second tube body away from the skin, an inverted U-shaped plate arranged on the side of the force-applying hole plate away from the skin, and a limiting plate arranged on the side of the force-applying hole plate and located inside the inverted U-shaped plate and used to clamp and fix the syringe force plate.

[0019] A further preferred technical solution is that: the number of the inverted U-shaped plates and the limiting plates is four pairs in total, and the middle plates of the four inverted U-shaped plates are connected in sequence to form a rectangular frame.

[0020] The present invention has the following advantages: first, after the syringe is installed on the protective device, it is always parallel to the fixed outer tube unit. As long as the fixed outer tube unit is not deflected, the injection operation is vertically inserted, avoiding the pain caused by the deflection of the needle; second, the sliding inner tube unit has a certain sliding distance on the fixed outer tube unit, and the syringes of the same specification can ensure the insertion depth when in use, avoiding the problem of insufficient or excessive depth; third, when the sliding inner tube unit is inserted together with the syringe, it is always stably connected with the fixed outer tube unit, ensuring that the syringe has high stability during the injection operation; fourth, the entire protective device is easy to assemble, and the structural stability of the starting state and the end state of the injection operation is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 It is a schematic diagram of the structure of the fixed outer tube unit in the present invention.

[0023] Figure 3 It is a schematic diagram of the position structure of the sliding inner tube unit in the present invention.

[0024] Figure 4 It is a schematic diagram of the position structure of the syringe clamping frame unit in the present invention.

[0025] Figure 5 It is a schematic diagram of the structure of a syringe in the prior art.

[0026] In the accompanying drawings, the components represented by the various reference numerals are as follows: a fixed outer tube unit 1, a syringe a, a sliding inner tube unit 2, a syringe clamping frame unit 3, a first tube body 101, an axial plate 102, an annular clamping block 103, an axial clamping block 104, a second tube body 201, a sliding groove 202, a protruding strip 203 for completion, a bending plate 105, a protruding strip 204 for waiting, a paired limiting block 205, a protruding strip 206 for installation alignment, an enlarged tube body 207, a force-applying orifice plate 301, an inverted U-shaped plate 302, and a limiting plate 303. DETAILED DESCRIPTION

[0027] The following descriptions are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention.

[0028] Example: As shown in the attached Figure 1-5 As shown, a safety protection device for a syringe comprises a fixed outer tube unit 1 for pressing on the skin, a sliding inner tube unit 2 inserted on the fixed outer tube unit 1 and used for inserting and installing a syringe a, and a syringe clamping frame unit 3 arranged at an end of the sliding inner tube unit 2 away from the skin.

[0029] In this embodiment, the general steps of using the protective device include:

[0030] First, slightly insert the sliding inner tube unit 2 on the fixed outer tube unit 1 to ensure that the two are connected together. This step can also be pre-installed by the manufacturer before leaving the factory;

[0031] Second, insert the syringe a into the sliding inner tube unit 2, and fix the syringe a on the syringe clamping frame unit 3;

[0032] Third, push the sliding inner tube unit 2 forward to the bottom on the fixed outer tube unit 1, and the needle has been inserted to the preset depth;

[0033] Fourth, the index finger and middle finger hook the syringe clamping frame unit 3, and the thumb presses down the push rod of the syringe a, and the injection action is completed;

[0034] Finally, pinch the fixed outer tube unit 1 and pull it up, and the whole injection operation is completed.

[0035] The front end refers to the side close to the skin, whereas the rear end refers to the side away from the skin and operated by hand.

[0036] In addition, during the entire injection operation, the syringe a, the sliding inner tube unit 2 and the fixed outer tube unit 1 are all unable to move horizontally. Therefore, as long as the fixed outer tube unit 1 is pressed vertically on the skin and does not move, the entire injection operation will not be deflected, and the injection needle is inserted and pulled out perpendicular to the skin, so the probability of pulling the patient's skin and causing greater pain is minimized.

[0037] The fixed outer tube unit 1 includes a first tube body 101 , an axial plate 102 arranged at an end of the first tube body 101 away from the skin, and an annular snap-fit ​​block 103 and an axial snap-fit ​​block 104 arranged on the radial inner side of the axial plate 102 .

[0038] In this embodiment, the first tube body 101 is always pressed vertically on the patient's skin, and the sliding inner tube unit 2 is pushed forward and blocked by the axial plate 102, which is the end point of the push. At this time, the insertion depth of the injection needle is the preset depth of the injection operation.

[0039] Finally, after the sliding inner tube unit 2 is pushed forward into position, it is necessary to avoid both harmful circumferential rotation and harmful retreat and pull-out actions. Therefore, the circumferential engaging block 103 engages with the sliding inner tube unit 2 to avoid the former, and the axial engaging block 104 engages with the sliding inner tube unit 2 to avoid the latter.

[0040] The sliding inner tube unit 2 includes a second tube body 201, a sliding groove 202 arranged on the second tube body 201 and used to insert the annular locking block 103, and a completion protrusion 203 arranged on the outer annular surface of the second tube body 201 away from the skin and used to lock and fix the axial locking block 104.

[0041] In this embodiment, the protective device is installed in a ready-to-use state, that is, the annular locking block 103 is locked in the front part of the sliding groove 202, and after the second tube 201 and the syringe a are fully inserted, the annular locking block 103 is locked in the rear part of the sliding groove 202, ensuring that the second tube 201 and the first tube 101 will not move circumferentially during the entire injection operation.

[0042] In addition, the end point of the insertion of the second tube body 201 into the first tube body 101 is when the protruding strip 203 passes forward over the axial locking block 104. At this time, the axial plate 102 just supports the syringe locking frame unit 3 at the end of the rear end of the second tube body 201, which is the end point of the insertion action. At this time, it is only necessary to prevent the second tube body 201 from retreating backward.

[0043] Therefore, the axial engaging block 104 protrudes inwards and is engaged with the rear end of the protruding strip 203 for completion, so as to prevent the second tube body 201 and the protruding strip 203 from retreating, that is, the injection needle is always stable at the preset depth before the injection operation.

[0044] The fixed outer tube unit 1 further includes a bending plate 105 disposed at an end of the first tube body 101 away from the skin and used to clamp the second tube body 201 inwardly. The bending plate 105 is disposed between the two axial clamping blocks 104 .

[0045] In this embodiment, the first function of the bending plate 105 is to clamp the second tube 201 radially inwardly to prevent the second tube 201 and the syringe a from being inserted too quickly.

[0046] In addition, when the second tube 201 is inserted into place, the bent plate 105 also needs to go over the protruding strip 203 for completion. At this time, the bent plate 105 and the protruding strip 203 for completion may be engaged or not engaged.

[0047] In this embodiment, there are four axial plates 102 and two curved plates 105, which are six in total.

[0048] The sliding inner tube unit 2 further includes a protruding strip 204 disposed on the outer annular surface of the second tube body 201 close to the skin and used to block the curved plate 105 .

[0049] In this embodiment, the standby state of the protective device after installation and before use is: the annular locking block 103 is clamped on the inner side surface of the front end groove body of the sliding groove 202, and the bent plate 105 is pressed against the front end side surface of the standby protruding strip 204. At this time, if the second tube body 201 wants to slide forward accidentally, it will be held by the bent plate 105, and if it wants to slide backward accidentally, it will be clamped by the inner side surface of the front end groove body of the sliding groove 202, thereby ensuring that the second tube body 201 is firmly connected to the first tube body 101 in the standby state and is not easy to loosen.

[0050] The two ends of the standby protruding strip 204 are more retracted than the two ends of the completion protruding strip 203 .

[0051] In this embodiment, when the protective device needs to be used, the bent plate 105 needs to pass over the protruding strip 204 for waiting. At this time, if the protruding strip 204 for waiting is longer, the axial locking block 104 must also be guaranteed to pass over the protruding strip 204 for waiting, which is unnecessary and will increase the resistance of the second tube body 201 to forward insertion.

[0052] Therefore, the standby protruding strip 204 is set relatively short to avoid contact with the axial engaging block 104, thereby ensuring that the standby state release operation of the protective device is appropriately easy and labor-saving.

[0053] The sliding inner tube unit 2 also includes a pair of limit blocks 205 arranged on the outer annular surface of the second tube body 201 close to the skin and used to align and install the annular locking block 103, and an installation alignment protruding strip 206 arranged on the outer annular surface of the second tube body 201 close to the skin and aligned with the waiting protruding strip 204.

[0054] In this embodiment, the annular snap-fit ​​block 103 is aligned with the paired limit blocks 205, and the bent plate 105 is aligned with the installation alignment protruding strip 206. Then, the second tube body 201 is inserted with force to complete the installation of the protective device, that is, the annular snap-fit ​​block 103 is inserted into the sliding groove 202, and the bent plate 105 is slid to the front of the waiting protruding strip 204.

[0055] The sliding inner tube unit 2 further includes an enlarged tube body 207 which is arranged on the end surface of the second tube body 201 close to the skin and is used to radially push up and open the annular engaging block 103 and the bending plate 105 outward.

[0056] In this embodiment, the circular profile formed by the radially innermost ends of the annular locking block 103 and the bending plate 105 is smaller than the outer diameter of the second tube body 201. Therefore, the annular locking block 103 and the bending plate 105 need to be "opened" a little first to ensure that the second tube body 201 can be smoothly inserted into the first tube body 101.

[0057] Therefore, the outer diameter of the enlarged tube body 207 forms a "step" in the insertion direction of the annular clamping block 103 and the bending plate 105 to ensure that the annular clamping block 103 and the bending plate 105 can slide smoothly on the second tube body 201.

[0058] The syringe clamping frame unit 3 includes a force-applying hole plate 301 arranged at a position on the side of the second tube body 201 away from the skin, an inverted U-shaped plate 302 arranged on the side of the force-applying hole plate 301 away from the skin, and a limiting plate 303 arranged on the side of the force-applying hole plate 301 and located inside the inverted U-shaped plate 302 and used for clamping and fixing the syringe force-applying plate b.

[0059] In this embodiment, the two syringe force plates b on the syringe a are correspondingly stuck between the two pairs of the inverted U-shaped plates 302 and the limit plates 303, and the syringe a is installed. When the second tube body 201 is inserted to the bottom on the first tube body 101, the depth of the injection needle protruding from the first tube body 101 is the injection depth.

[0060] In addition, one of the functions of the force-applying hole plate 301 is the same as that of the syringe force-applying plate b, which is to allow the index finger and the middle finger to hook thereon to ensure a stable pushing operation of the thumb.

[0061] There are four pairs of the inverted U-shaped plates 302 and the limiting plates 303 in total, and the middle plates of the four inverted U-shaped plates 302 are connected in sequence to form a rectangular frame.

[0062] In this embodiment, the four inverted U-shaped plates 302 are connected into a whole, which can ensure that the structural strength of the syringe clamping frame unit 3 is greater and the injection molding production is more convenient. Therefore, the overall shape of the four inverted U-shaped plates 302 is a rectangular frame with four connecting columns, which ensures that the syringe force plate b can effectively cross the rectangular frame and enter the four-sided fixed spatial position formed by the rectangular frame, the connecting columns and the limit plate 303, thereby ensuring that the syringe a is completely fixed on the syringe clamping frame unit 3.

[0063] 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 safety protection device for a syringe, characterized in that: The device comprises a fixed outer tube unit (1) for pressing against the skin, a sliding inner tube unit (2) inserted into the fixed outer tube unit (1) and used for inserting and installing a syringe (a), and a syringe clamping frame unit (3) arranged at an end of the sliding inner tube unit (2) away from the skin. The fixed outer tube unit (1) comprises a first tube body (101), an axial plate (102) arranged at an end of the first tube body (101) away from the skin, and an annular snap-fit ​​block (103) and an axial snap-fit ​​block (104) arranged on the radial inner side surface of the axial plate (102). The sliding inner tube unit (2) comprises a second tube body (201), a sliding notch (202) provided on the second tube body (201) and used for inserting the annular locking block (103), and a finishing protrusion (203) provided on the outer annular surface of the second tube body (201) on the side away from the skin and used for locking and fixing the axial locking block (104). The fixed outer tube unit (1) further comprises a bent plate (105) arranged at an end of the first tube body (101) away from the skin and used to clamp the second tube body (201) inwardly, the bent plate (105) being arranged between the two axial clamping blocks (104). The sliding inner tube unit (2) further comprises a protruding strip (204) for waiting for positioning, which is arranged on the outer annular surface of the second tube body (201) on the side close to the skin and is used to block the curved plate (105). The two ends of the standby protruding strip (204) are more indented than the two ends of the completion protruding strip (203). The sliding inner tube unit (2) further comprises a pair of limit blocks (205) arranged on the outer annular surface of the second tube body (201) close to the skin and used for aligning and installing the annular engaging block (103), and an installation alignment protruding strip (206) arranged on the outer annular surface of the second tube body (201) close to the skin and aligned with the positioning protruding strip (204). The end point of the insertion of the second tube (201) into the first tube (101) is when the protruding strip (203) passes forward over the axial locking block (104), and at this time, the axial plate (102) just supports the syringe locking frame unit (3) at the end of the rear end of the second tube (201).

2. A safety protection device for a syringe according to claim 1, characterized in that: The sliding inner tube unit (2) further comprises an enlarged tube body (207) which is arranged on the end surface of the second tube body (201) close to the skin and is used to radially push up and open the annular locking block (103) and the bending plate (105) outward.

3. A safety protection device for a syringe according to claim 1, characterized in that: The syringe clamping frame unit (3) comprises a force-applying hole plate (301) arranged at a position on the side of the second tube (201) away from the skin, an inverted U-shaped plate (302) arranged on the side of the force-applying hole plate (301) away from the skin, and a limiting plate (303) arranged on the side of the force-applying hole plate (301) and located inside the inverted U-shaped plate (302) and used for clamping and fixing the syringe force-applying plate (b).

4. A safety protection device for a syringe according to claim 3, characterized in that: There are four pairs of the inverted U-shaped plates (302) and the limiting plates (303) in total, and the middle plates of the four inverted U-shaped plates (302) are connected in sequence to form a rectangular frame.

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