CN218338775U - Safety protection device for syringe - Google Patents

Abstract

The utility model belongs to the technical field of medical instrument, especially, relate to a safety device for syringe. The utility model discloses a set up slip inner tube unit in fixed outer tube unit to set up the mode of cylinder block frame unit in the rear end of slip inner tube unit, reach more accurate, the safe effect of injection operation. The utility model has the advantages of it is following: firstly, after the needle cylinder is installed on the protection device, the needle cylinder is always parallel to the fixed outer tube unit, and as long as the fixed outer tube unit is not deflected, the injection operation is vertically inserted, so that pain caused by deflection of a needle head is avoided; secondly, the sliding inner tube unit has a determined sliding distance on the fixed outer tube unit, and the needle cylinders with the same specification can ensure the insertion depth when in use, thereby avoiding the problem of insufficient or overlarge depth; thirdly, when the sliding inner tube unit is inserted together with the needle cylinder, the sliding inner tube unit is always stably sleeved with the fixed outer tube unit, and the stability of the needle cylinder is high in the injection operation process.

Description

Safety protection device for syringe

Technical Field

The utility model belongs to the technical field of medical instrument, especially, relate to a safety device for syringe.

Background

The structure of syringe mainly includes cylinder and push rod, and in the use of syringe, the relatively comparatively common unexpected risk mainly has two, and first is the depth of insertion of syringe needle too big or undersize, causes the inaccurate accident in medicine injection position, and second is in the injection in-process, and the syringe needle takes place the skew, enlarges pinhole shape, brings great misery for patient.

Therefore, in order to solve the above two problems, various syringe protection devices have been provided on the market, but the usage effect thereof is insufficient to some extent.

For example, chinese utility model patent with patent publication No. CN213191805U and publication date 2021.05.14 discloses a protective structure of syringe, including an empty section of thick bamboo and lag, the inside of an empty section of thick bamboo is provided with the piston axle, and the one end fixedly connected with piston of piston axle, one side of an empty section of thick bamboo surface has seted up ring groove.

But the syringe protective structure in the utility model patent still takes place the harmful problems such as cylinder slope, cylinder rotation easily when protecting whole injection operation, and whole protective structure's effect still is stable inadequately, comprehensive inadequately.

For another example, chinese utility model patent that patent publication number is CN209378297U, and the announcement day is 2019.09.13 discloses a card lock type lead glass syringe lag, including a lead glass section of thick bamboo, lag end cover, lag gland, the lag end cover is buckled lead glass section of thick bamboo upper end mouth and is become with a lead glass section of thick bamboo fixed connection, the lag gland sets up in lag end cover top and with lag end cover threaded connection, be provided with the through-hole that is used for putting into the syringe stack shell along the axial in the lead glass section of thick bamboo, the lid terminal surface of lag end cover sets up the end cover through-hole that matches with the through-hole in the lead glass section of thick bamboo and be used for passing the syringe stack shell, the lid terminal surface setting of lag gland matches with syringe fin size and is used for passing the gland through-hole of syringe fin.

However, the syringe shield of the utility model, which is integral with the barrel, may still be tilted during insertion of the needle. And more importantly, the shield eventually forces the needle perpendicular to the patient's skin surface with the shield, causing great pain in the pulling of the needle through the muscles.

Therefore, in view of the above, there is a need for a safety device that can ensure that a syringe can be inserted to a predetermined depth, always inserted vertically, and not rotated.

SUMMERY OF THE UTILITY MODEL

The utility model provides a safety device for syringe, it can be through setting up slip inner tube unit in fixed outer tube unit to set up the mode of cylinder block frame unit in the rear end of slip inner tube unit, reach more accurate, the safe effect of injection operation.

The utility model provides a technical scheme that above-mentioned problem adopted is: a safety protection device for an injector comprises a fixed outer tube unit, a sliding inner tube unit and a needle cylinder clamping frame unit, wherein the fixed outer tube unit is used for pressing the skin, the sliding inner tube unit is inserted on the fixed outer tube unit and used for inserting and installing the needle cylinder, and the needle cylinder clamping frame unit is arranged at one end, far away from the skin, of the sliding inner tube unit.

The further preferred technical scheme is as follows: the fixed outer tube unit comprises a first tube body, an axial plate arranged at one end, far away from the skin, of the first tube body, and an annular clamping block and an axial clamping block which are arranged on the radial inner side face of the axial plate in a selected mode.

The further preferred technical scheme is as follows: the sliding inner pipe unit comprises a second pipe body, a sliding notch and a finishing protruding strip, wherein the sliding notch is arranged on the second pipe body and used for being inserted into the annular clamping block, and the finishing protruding strip is arranged on the outer ring surface of one side, far away from the skin, of the second pipe body and used for clamping and fixing the axial clamping block.

The further preferred technical scheme is as follows: the fixed outer tube unit further comprises a bending plate which is arranged at the position, far away from the skin, of one end of the first tube body and used for clamping the second tube body inwards, and the bending plate is arranged between the two axial clamping blocks.

The further preferred technical scheme is as follows: the sliding inner tube unit further comprises a protruding strip for positioning, which is arranged on the outer ring surface of the skin-close side of the second tube body and used for blocking the bent plate.

The further preferred technical scheme is as follows: the two ends of the protrusion strip for waiting to be positioned are more retracted compared with the two ends of the protrusion strip for finishing.

The further preferred technical scheme is as follows: the sliding inner tube unit further comprises a pair of limiting blocks and a pair of protruding strips, wherein the limiting blocks are arranged on the outer ring surface of the side, close to the skin, of the second tube body and used for aligning and installing the annular clamping blocks, and the protruding strips are arranged on the outer ring surface of the side, close to the skin, of the second tube body and aligned with the protruding strips for installation and alignment.

The further preferred technical scheme is as follows: the sliding inner tube unit further comprises an amplifying tube body which is arranged on the end face, close to the skin, of the second tube body and used for radially outwards jacking and opening the annular clamping block and the bending plate.

The further preferred technical scheme is as follows: the needle cylinder clamping frame unit comprises a force application pore plate, an inverted U-shaped plate and a limiting plate, wherein the force application pore plate is arranged at the position, far away from the skin, of the second pipe body, the inverted U-shaped plate is arranged on the side face, far away from the skin, of the force application pore plate, and the limiting plate is arranged on the side face of the force application pore plate, is positioned in the inverted U-shaped plate and is used for clamping and fixing the needle cylinder force application plate.

The further preferred technical scheme is as follows: the number of the inverted U-shaped plates and the number of the limiting plates are four, and the four intermediate plates of the inverted U-shaped plates are sequentially connected to form a rectangular frame.

The utility model has the advantages of it is following: firstly, after the needle cylinder is installed on the protection device, the needle cylinder is always parallel to the fixed outer tube unit, and as long as the fixed outer tube unit is not deflected, the injection operation is vertically inserted, so that pain caused by deflection of a needle head is avoided; secondly, the sliding inner tube unit has a determined sliding distance on the fixed outer tube unit, and the needle cylinders with the same specification can ensure the insertion depth when in use, thereby avoiding the problem of insufficient or overlarge depth; thirdly, when the sliding inner tube unit is inserted together with the needle cylinder, the sliding inner tube unit is stably sleeved with the fixed outer tube unit all the time, so that the stability of the needle cylinder in the injection operation process is high; fourthly, the whole protection device is low in assembly difficulty, and the structural stability of the starting point state and the end point state of the injection operation is high.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the middle fixed outer tube unit of the present invention.

Fig. 3 is a schematic view of the position structure of the middle sliding inner tube unit of the present invention.

Fig. 4 is a schematic view of the position structure of the needle cylinder engaging frame unit of the present invention.

Fig. 5 is a schematic view showing a structure of a syringe in the related art.

In the drawings, the reference numerals designate the following components: the device comprises 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, a circumferential clamping block 103, an axial clamping block 104, a second tube body 201, a sliding notch 202, a finishing protrusion strip 203, a bending plate 105, a standby protrusion strip 204, a pair of limiting blocks 205, a mounting alignment protrusion strip 206, an amplifying tube body 207, a force application pore plate 301, an inverted U-shaped plate 302 and a limiting plate 303.

Detailed Description

The following description is merely exemplary of the present invention and is not intended to limit the scope of the present invention.

The embodiment is as follows: as shown in fig. 1 to 5, a safety guard for an injector includes 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 for insertion-mounting of a syringe a, and a syringe engagement frame unit 3 provided at an end of the sliding inner tube unit 2 remote from the skin.

In this embodiment, the general steps of using the protection device sequentially include:

firstly, the sliding inner pipe unit 2 is inserted on the fixed outer pipe unit 1 in a small scale to ensure that the fixed outer pipe unit and the sliding inner pipe unit are connected together, and the step can be also pre-installed by a manufacturer before leaving a factory;

secondly, inserting a needle cylinder a into the sliding inner tube unit 2, and fixing the needle cylinder a on the needle cylinder clamping frame unit 3;

thirdly, the sliding inner tube unit 2 is pushed forward to the bottom on the fixed outer tube unit 1, and the needle is inserted to the bottom by a preset depth;

fourthly, the forefinger and the middle finger hook the needle cylinder clamping frame unit 3, the thumb presses down the push rod of the needle cylinder a, and the injection action is finished;

finally, the fixed outer tube unit 1 is pinched and pulled up, and the whole injection operation is completed.

Wherein, the front end refers to the side close to the skin, whereas the back end refers to the side far away from the skin and operated by hands.

In addition, during the whole injection operation, the three of the syringe a, the sliding inner tube unit 2 and the fixed outer tube unit 1 are all immovable in the horizontal direction, so as long as the fixed outer tube unit 1 is pressed vertically on the skin and is still, the whole injection operation will not be deflected, and the injection needle is inserted and pulled out perpendicularly to the skin, so that the probability of pulling the skin of a patient and causing a great pain is lowest.

The fixed outer tube unit 1 comprises a first tube body 101, an axial plate 102 arranged at one end of the first tube body 101 far away from the skin, and an annular clamping block 103 and an axial clamping block 104 which are alternatively arranged on the radial inner side surface of the axial plate 102.

In this embodiment, the first tube 101 is always pressed vertically against the skin of the patient, the sliding inner tube unit 2 is pushed forward and stopped by the axial plate 102, i.e. the end point of the pushing, and the insertion depth of the injection needle is the preset depth of the injection operation.

Finally, since the sliding inner tube unit 2 is pushed forward to the proper position, not only the harmful circumferential rotation but also the harmful retraction and extraction motion are prevented, the circumferential engagement piece 103 is engaged with the sliding inner tube unit 2, so that the former is prevented from being engaged with the sliding inner tube unit 2, and the latter is prevented from being engaged with the axial engagement piece 104.

The sliding inner tube unit 2 includes a second tube 201, a sliding notch 202 provided in the second tube 201 and adapted to be inserted into the circumferential engagement block 103, and a finishing protrusion 203 provided on an outer circumferential surface of the second tube 201 on a side away from the skin and adapted to engage and fix the axial engagement block 104.

In this embodiment, the protection device is installed in a state to be acted, that is, the annular engaging block 103 is clamped at the front part of the sliding notch 202, and after the second tube 201 with the syringe a is completely inserted, the annular engaging block 103 is clamped at the rear part of the sliding notch 202, so that the second tube 201 and the first tube 101 do not move in the annular direction in the whole injection operation.

In addition, the end point of the second tube 201 inserted into the first tube 101 is that the complete protruding strip 203 passes forward over the axial engaging block 104, and at this time, the axial plate 102 just props against the needle cylinder engaging frame unit 3 at the tail end of the rear end of the second tube 201, that is, the end point of the insertion action, and at this time, it is only necessary to prevent the second tube 201 from retreating backward.

Therefore, the axial engaging block 104 protrudes inward and is engaged with the rear end of the protruding strip 203 for finishing, so as to prevent the second tube 201 from retreating together with the protruding strip 203 for finishing, i.e. the injection needle is always stabilized at a preset depth before injection operation.

The fixed outer tube unit 1 further includes a bending plate 105 disposed at a position of an end of the first tube 101 away from the skin and configured to clamp the second tube 201 inward, and the bending plate 105 is disposed between the two axial engaging pieces 104.

In this embodiment, the first function of the curved plate 105 is to always grip the second tubular body 201 radially inwards, avoiding the second tubular body 201 with the needle cylinder a from being inserted too quickly.

In addition, when the second pipe 201 is inserted into position, the bending plate 105 also passes over the finishing protrusion 203, and the bending plate 105 and the finishing protrusion 203 may be engaged or disengaged.

In the present embodiment, the number of the axial plates 102 is four, and the number of the two curved plates 105 is six.

The sliding inner tube unit 2 further includes a protrusion strip 204 for positioning provided on an outer circumferential surface of the skin-near side of the second tube 201 for blocking the bending plate 105.

In this embodiment, the standby state of the protection device after installation and before use is: the annular clamping block 103 is clamped on the inner side face of the groove body at the front end of the sliding notch 202, the bent plate 105 is propped against the side face of the front end of the protrusion strip 204 for standby, at the moment, the second pipe body 201 is propped against the bent plate 105 and is expected to slide backwards accidentally when the second pipe body 201 is expected to slide forwards, and the inner side face of the groove body at the front end of the sliding notch 202 is clamped, so that the second pipe body 201 and the first pipe body 101 are firmly connected and are not easy to loosen in a standby state.

The two ends of the protrusion strip 204 for waiting are more retracted than the two ends of the protrusion strip 203 for finishing.

In this embodiment, when the protection device needs to be used, the curved plate 105 needs to cross the protrusion strip 204 for positioning, and at this time, if the protrusion strip 204 for positioning is long, the axial engaging piece 104 also needs to cross the protrusion strip 204 for positioning, which is not necessary, and the resistance of the second tube 201 to be inserted forward for use is increased.

Therefore, the protrusion strip 204 for waiting to be positioned is set to be relatively short, so as to avoid contact with the axial clamping block 104, and ensure that the release operation of the protection device in the waiting use state is properly easy and labor-saving.

The sliding inner tube unit 2 further includes a pair of stoppers 205 disposed on an outer circumferential surface of a skin-close side of the second tube 201 for aligning and mounting the circumferential engaging pieces 103, and a mounting alignment protrusion strip 206 disposed on an outer circumferential surface of a skin-close side of the second tube 201 for aligning and mounting the to-be-positioned protrusion strip 204.

In this embodiment, the hoop block 103 aligns the stopper 205 in pairs, the crooked board 105 aligns the installation is aimed at and is used protruding strip 206, then the second body 201 application of force again inserts, can with the protector installation finishes, promptly will hoop block 103 card is gone into the notch 202 for the slip, will crooked board 105 slides to wait to be located with protruding strip 204 with the front.

The sliding inner tube unit 2 further includes an amplifying tube 207 which is disposed on an end surface of the second tube 201 close to the skin and is used for radially outwardly pushing up and opening the annular engaging block 103 and the bending plate 105.

In this embodiment, the annular engaging block 103 and the curved plate 105 have a circular contour formed at the radially innermost end thereof, which is smaller than the outer diameter of the second pipe 201, so that the annular engaging block 103 and the curved plate 105 need to be slightly opened first to ensure that the second pipe 201 is smoothly inserted into the first pipe 101.

Therefore, the outer diameter of the amplification tube 207 is formed as a "step" in the insertion direction of the annular engagement piece 103 and the curved plate 105, and the annular engagement piece 103 and the curved plate 105 are ensured to slide smoothly on the second tube 201.

The syringe engaging rack unit 3 includes a force application hole plate 301 provided at a position on a side of the second tube 201 away from the skin, an inverted U-shaped plate 302 provided on a side surface of the force application hole plate 301 away from the skin, and a stopper plate 303 provided on a side surface of the force application hole plate 301 and located in the inverted U-shaped plate 302 and engaging and fixing the syringe force application plate b.

In this embodiment, the two syringe force application plates b on the syringe a are clamped between the two pairs of inverted U-shaped plates 302 and the limiting plate 303 in a one-to-one correspondence manner, so that the syringe a is completely installed, and when the second tube 201 is inserted into the first tube 101 to the bottom, the depth of the injection needle protruding out of the first tube 101 is the injection depth.

In addition, one of the functions of the force application hole plate 301 is to allow the index finger and the middle finger to be hooked in accordance with the syringe force application plate b, thereby ensuring a stable pushing operation of the thumb.

The number of the inverted U-shaped plates 302 and the number of the limiting plates 303 are four, and the four intermediate plates of the inverted U-shaped plates 302 are sequentially connected to form a rectangular frame.

In this embodiment, four the board 302 of falling U connects into a whole, can guarantee that the structural strength of cylinder block frame unit 3 is bigger, and it is more convenient to mould plastics production, consequently four the whole shape of board 302 of falling U is exactly a rectangle framework, adds four spliced poles, guarantees that cylinder application of force board b can cross this rectangle framework effectively, enters into the fixed spatial position in four sides that rectangle framework, spliced pole, limiting plate 303 formed, guarantees that cylinder a is in by complete fixation on the cylinder block frame unit 3.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. These are non-inventive modifications and are intended to be protected by the following claims.

Claims (10)

1. A safety protection device for a syringe is characterized in that: the skin-pressing needle tube comprises a fixed outer tube unit (1) used for pressing the skin, a sliding inner tube unit (2) inserted on the fixed outer tube unit (1) and used for inserting and installing a needle tube (a), and a needle tube clamping frame unit (3) arranged at one end position, far away from the skin, of the sliding inner tube unit (2).

2. A syringe safety shield apparatus according to claim 1, wherein: the fixed outer tube unit (1) comprises a first tube body (101), an axial plate (102) arranged at one end, far away from the skin, of the first tube body (101), and a circumferential clamping block (103) and an axial clamping block (104) which are arranged on the radial inner side face of the axial plate (102) in an alternative mode.

3. A syringe safety shield apparatus according to claim 2, wherein: the sliding inner pipe unit (2) comprises a second pipe body (201), a sliding notch (202) which is arranged on the second pipe body (201) and used for being inserted into the annular clamping block (103), and a finishing protruding strip (203) which is arranged on the outer ring surface of the side, far away from the skin, of the second pipe body (201) and used for clamping and fixing the axial clamping block (104).

4. A syringe safety shield apparatus according to claim 3, wherein: the fixed outer tube unit (1) further comprises a bending plate (105) which is arranged at one end of the first tube body (101) far away from the skin and used for clamping the second tube body (201) inwards, and the bending plate (105) is arranged between the two axial clamping blocks (104).

5. A syringe safety shield according to claim 4, wherein: the sliding inner tube unit (2) further comprises a protrusion strip (204) for positioning, which is arranged on the outer ring surface of the skin-close side of the second tube body (201) and is used for blocking the bending plate (105).

6. A syringe safety shield according to claim 5, wherein: and the two ends of the protrusion strip (204) for waiting position are more retracted compared with the two ends of the protrusion strip (203) for finishing position.

7. A syringe safety shield according to claim 5, wherein: the sliding inner pipe unit (2) further comprises a pair of limiting blocks (205) which are arranged on the outer ring surface of the side, close to the skin, of the second pipe body (201) and used for aligning and installing the annular clamping blocks (103), and installation alignment protruding strips (206) which are arranged on the outer ring surface of the side, close to the skin, of the second pipe body (201) and aligned with the to-be-positioned protruding strips (204).

8. A syringe safety shield according to claim 5, wherein: the sliding inner tube unit (2) further comprises an amplifying tube body (207) which is arranged on the end face of the second tube body (201) close to the skin side and used for radially outwards jacking and opening the annular clamping block (103) and the bending plate (105).

9. A safety shield apparatus for a syringe as defined in claim 5, wherein: the needle cylinder clamping frame unit (3) comprises a force application pore plate (301) arranged at one side position, far away from the skin, of the second pipe body (201), an inverted U-shaped plate (302) arranged on the side face, far away from the skin, of the force application pore plate (301), and a limiting plate (303) arranged on the side face of the force application pore plate (301), located in the inverted U-shaped plate (302), and used for clamping and fixing a needle cylinder force application plate (b).

10. A syringe safety shield according to claim 9, wherein: the number of the inverted U-shaped plates (302) and the number of the limiting plates (303) are four, and the middle plates of the inverted U-shaped plates (302) are sequentially connected to form a rectangular frame body.

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