TWI554303B - Injection syringe safety protection device - Google Patents

Description

Injection syringe safety device

SUMMARY OF THE INVENTION The present invention is directed to a protective device that completely shields the needle body of a syringe after use from the puncture of a medical professional.

It is necessary to provide a protective device on the syringe barrel based on the risk of protecting the medical staff from needle sticking of the used syringe. A typical type of protection device is generally summarized in two types. The first one is disclosed in U.S. Patent No. 8,860,694, which is to retract the needle into the syringe; the second type is disclosed in the Chinese Patent Publication No. I255729. A sheath is placed on the outer wall of the syringe, and the sheath can be moved along the outer wall of the syringe to push the sheath toward the needle body to completely shield the needle body.

The object of the present invention is to provide an injection syringe safety protection device which completely shields the needle body with a protective sleeve after the injection syringe is used, so as to prevent the needle body from being exposed.

The syringe safety protection device of the present invention comprises a syringe, a push rod disposed in the syringe for reciprocating movement, and a set of needles at the front end of the syringe; the safety protection The device includes a locking ring and a protective cover.

The locking ring includes an annular body, a plurality of first positioning teeth, a plurality of second positioning teeth, and a plurality of third positioning teeth; the annular body is sleeved and fixed to the outer wall of the front end of the syringe, and the plurality of The first positioning teeth are equally spaced from the front portion of the outer wall of the annular body, and the adjacent two first positioning teeth Forming a first spacer portion; a plurality of second positioning teeth are equally spaced from the rear portion of the outer wall of the annular body, and a second spacing portion is formed between the adjacent second positioning teeth; the first positioning tooth is Forming a bevel block by a bump, the bevel block is opposite to the second spacer; the structural thickness of the second positioning tooth is gradually decreased from the first end to the second end thereof, and the first end of the second positioning tooth Facing the first partition.

The protective sleeve has a stop ring on the inner wall of the rear end, the stop ring has a slope, and the highest point of the slope is connected with the inner wall of the protective sleeve to form a stop edge, the stop edge facing the protective sleeve a rear end; the inner wall of the front end of the protective sleeve is provided with a pushing surface which is gradually enlarged from the inside to the outside.

When the protective sleeve is sleeved on the outer wall of the syringe, the protective sleeve is pushed to face the inclined block of the first positioning tooth that should lock the ring, so that the protective sleeve cannot move in the direction of the needle body without external force. When the protective sleeve is displaced along the syringe to completely shield the needle body, the retaining ring of the protective sleeve is opposite to the first end of the second positioning tooth of the locking ring, and the bevel of the retaining ring of the protective sleeve The ramp blocks of the first positioning teeth of the locking ring are blocked from each other, so that the protective sleeve can no longer be retracted to permanently shield the needle body.

Further, the locking ring further includes a plurality of third positioning teeth, and the equal spacing is protruded from the rear portion of the inner wall of the annular body; the third positioning tooth is formed by connecting a convex block and a inclined surface block, the inclined surface The highest point of the block is connected to the bump, and the lowest point of the ramp block continues the smallest diameter of the tapered surface of the inner wall of the annular body. When the locking ring is coupled to the front end of the syringe, the protrusion of the third positioning tooth is pressed against the outer wall of the front end portion to fix the locking ring to the front end portion.

The specific effect of the invention: the protective sleeve can be positioned outside the syringe without obstructing the use of the needle by the medical staff.

The protective sleeve can be moved forward from the syringe to completely shield the used needle body Avoid punctuating medical staff.

The protective sleeve is a cylindrical structure and has a simple structure, which does not greatly enlarge the volume or size of the syringe, and does not hinder the medical staff from using the syringe.

After the protective cover completely shields the needle body, it is restricted by the locking ring and can no longer be moved back to ensure that the used needle body will not be exposed again.

After the protective cover completely shields the needle body, it is restricted by the locking ring and can no longer move forward to avoid the protective sleeve from being disengaged from the syringe.

The protective sleeve is simple to operate, can be operated with one hand, and can completely prevent the finger of the medical staff from approaching or contacting the needle body during operation.

The protective sleeve is pushed forward from the syringe to the shadowing needle body to have appropriate frictional force, so that the operator can control the speed and strength of the shifting, and the operation safety is further improved.

The front end of the protective sleeve is provided with a flange, which can play the role of blocking the finger, preventing the operator from sliding the handle when pushing the protective cover.

10‧‧‧Injection syringe

11‧‧‧ syringe

12‧‧‧Put

13‧‧‧ needle

14‧‧‧ front end

15‧‧‧stop edge

30‧‧‧Locking ring

31‧‧‧Circular body

32‧‧‧First compartment

33‧‧‧First positioning tooth

331‧‧‧Bumps

335‧‧‧Bevel block

34‧‧‧Second positioning tooth

341‧‧‧ first end

342‧‧‧ second end

35‧‧‧ Third positioning tooth

351‧‧‧Bumps

355‧‧‧Bevel block

36‧‧‧ cone torus

37‧‧‧Second compartment

50‧‧‧ protective cover

51‧‧‧Flange

52‧‧‧ pushed face

53‧‧‧Raw ribs

54‧‧‧stop ring

541‧‧‧Slope

542‧‧‧ 止边

The first figure is an exploded perspective view of the safety protection device of the present invention.

The second figure is one of the external appearances of the safety protection device of the present invention.

The third figure is the second appearance of the combination of the safety protection device of the present invention.

The fourth figure is a perspective view of the first perspective of the locking ring of the safety protection device of the present invention.

The fifth figure is a perspective view of the second perspective of the locking ring of the safety protection device of the present invention.

Figure 6 is a plan view of the locking ring of the safety protection device of the present invention.

Figure 7 is a cross-sectional view of the locking ring of the safety protection device of the present invention.

Figure 8 is a cross-sectional exploded view of the safety protection device of the present invention.

The ninth figure is one of the combined sectional views of the safety protection device of the present invention.

The tenth figure is the second sectional view of the combination of the safety protection device of the present invention.

The eleventh figure is an enlarged view of the portion of the one-point chain coil in the ninth figure.

Figure 12 is an enlarged view of the portion of the one-point chain coil in the tenth figure.

The central idea expressed in the column of the above summary of the invention is expressed by way of specific examples. Various items in the embodiments are depicted in terms of ratios, dimensions, amounts of deformation, or displacements that are suitable for illustration, and are not drawn to the proportions of actual elements, as set forth above.

As shown in the first, second and third figures, the syringe safety protection device of the invention comprises an injection syringe 10, a locking ring 30 and a protective sleeve 50. The syringe 10 includes a syringe 11, a push rod 12 that is reciprocally inserted into the syringe 11, and a needle body 13 that is fitted to the front end of the syringe 11. The outer wall of the syringe 11 has a front end portion 14 formed by shrinking the outer diameter and a stop edge 15 formed by a difference in outer diameter. The protective sleeve 50 is a hollow cylinder which is open at both ends, and the front outer wall has a flange 51. The front inner wall has a pushing surface 52 which is enlarged from the inside to the outside. The inner wall of the protective sleeve 50 is equally spaced in the direction of the parallel axis. A plurality of thin ribs 53 are provided, and the front end of the thin rib 53 is connected to the largest diameter portion of the push-out surface 52 of the protective cover 50. The protective cover 50 is sleeved on the outer wall of the syringe 11. The locking ring 30 is secured to the front end 14 of the syringe 11 and further limits the protective sleeve 50 from the syringe 11 . The second figure discloses that the protective cover 50 is located on the outer wall of the syringe 11, and the needle body 13 is exposed. This third figure discloses that the protective cover 50 moves in the direction of the needle body 13 along the syringe 11 and completely shields the needle body 13.

As shown in the fourth to seventh figures, the locking ring 30 includes an annular body 31 and a plurality of first positioning positions. The teeth 33, the plurality of second positioning teeth 34, and the plurality of third positioning teeth 35. A plurality of the first positioning teeth 33 are equally spaced apart from the front wall portion of the outer wall of the annular body 31, and a first spacing portion 32 is formed between the adjacent two first positioning teeth 33. A plurality of second positioning teeth 34 are equally spaced from the rear wall portion of the outer wall of the annular body 31, and a second spacing portion 37 is formed between the adjacent two second positioning teeth 34. The second positioning tooth 34 is opposite to the first spacing portion 32. The first positioning tooth 33 is opposite to the second spacing portion 37. A plurality of third positioning teeth 35 are equally spaced from the rear portion of the inner wall of the annular body 31.

The first positioning tooth 33 is formed by a bump 331 connected to a bevel block 335. The highest point of the bevel block 335 is connected to the bump 331, and the lowest point of the bevel block is connected to the outer wall of the annular body 31, and Relative to the second spacer 37.

The structural thickness of the second positioning tooth 34 gradually decreases from the first end 341 thereof to the second end 342, and the first end 341 of the second positioning tooth 34 faces the first spacing portion 32.

The third positioning tooth 35 is formed by a protrusion 351 and a slope block 355. The highest point of the slope block 355 is connected to the protrusion 351. The lowest point of the slope block 355 is connected to the annular body 31. The inner wall is connected to the smallest diameter of the tapered surface 36 of the annular body 31.

As shown in the eighth, ninth, and eleventh drawings, the protective cover 50 is sleeved on the outer wall of the syringe 11, and then the locking ring 30 is passed over the front end portion 14 of the syringe 11. The locking ring 30 passes through the front end portion 14 of the syringe 11 by the guiding of the tapered ring surface 36 and the inclined block 355 of the third positioning tooth 35 until the stopping edge 15 of the syringe 11 blocks the locking ring. 30 so far. The hardness of the plastic used in the locking ring 30 is greater than the plastic hardness of the front end portion 14 of the syringe 11. When the locking ring 30 is coupled to the front end portion 14 of the syringe 11, the protrusion 351 of the third positioning tooth 35 is The outer wall of the front end portion 14 is strongly pressed and bitten, and the lock ring 30 is positioned at the front end portion 14 of the syringe barrel 11. The bevel block 335 of the first positioning tooth 33 of the locking ring 30 blocks the push-out surface 52 of the protective cover 50 and the thin rib For the reason of the front end of the strip 53, the locking block 30 blocks the protective cover 50 without external force pushing, so that the protective cover 50 does not easily slide on the syringe 11 or disengage from the syringe 11.

As shown in the eighth, tenth, and twelfth drawings, the inner wall of the rear end of the protective cover 50 has a stop ring 54 having a slope 541. The highest point of the slope 541 is connected with the inner wall of the protective cover 50. A stop rib 542 faces the rear end of the protective cover 50. When the syringe 10 is used, the needle 13 must be shielded from punctuating the medical staff. At this time, the outer wall of the protective cover 50 can be pinched by a finger, and the protective cover 50 can be urged to push the direction of the needle body 13. The bevel block 335 of the first positioning tooth 33 of the locking ring 30 blocks the pushing surface 52 of the protective cover 50 and the thin rib 53 . When the protective cover 50 is initially pushed, there is a slight resistance, as long as it is applied. The thrust breaks through the resistance, and the plastic material of the protective cover 50 has a slight elasticity, and the pushing surface 52 and the thin rib 53 of the protective sleeve 50 can pass through the inclined block 335 of the first positioning tooth 33 of the locking ring 30, The protective cover 50 can be moved in the direction of the needle body 13; during the pushing of the protective cover 50, the thin rib 53 can generate a frictional force when passing through the surface of the protrusion 331 of the first positioning tooth 33, so that the slight limitation can be The movement of the protective cover 50 is not too fast. The flange 51 can also function as a finger stop to avoid slipping the hand when the cover 50 is pushed.

Finally, when the protective cover 50 completely shields the needle body 13, the slope 541 of the stop ring 54 of the inner wall of the rear end of the protective sleeve 50 passes through the second positioning tooth 34 of the locking ring 30, and the stop of the stop ring 54 The edge 542 is relatively resistant to the first end 341 of the second positioning tooth 34, so that the protective cover 50 can no longer be retracted. In addition, when the protective cover 50 completely shields the needle body 13, the slope 541 of the retaining ring 50 of the protective sleeve 50 contacts the bevel block 335 of the first positioning tooth 33 of the locking ring 30, and the inclined surface is tangent to protect The sleeve 50 creates a large resistance that the boot 50 cannot escape from the locking ring 30 through the first positioning tooth 33.

10‧‧‧Injection syringe

11‧‧‧ syringe

12‧‧‧Put

13‧‧‧ needle

14‧‧‧ front end

15‧‧‧stop edge

30‧‧‧Locking ring

50‧‧‧ protective cover

51‧‧‧Flange

52‧‧‧ pushed face

53‧‧‧Raw ribs

Claims (8)

An injection syringe safety protection device, comprising: a syringe, a push rod disposed in the syringe for reciprocating movement, and a set of needles at the front end of the syringe; the safety protection device comprises a locking ring, the locking ring includes an annular body, a plurality of first positioning teeth, a plurality of second positioning teeth, and a plurality of third positioning teeth; the annular body sleeve is fixed to the outer wall of the front end of the injection barrel The first positioning teeth are equally spaced apart from the front portion of the outer wall of the annular body, and a first spacing portion is formed between the adjacent two first positioning teeth; the plurality of second positioning teeth are equally spaced apart from the a second spacer is formed between the adjacent second positioning teeth of the annular body outer wall rear portion; each of the first positioning teeth is formed by a bump connecting a slope block, and the slope block is opposite to the second interval a structure thickness of each of the second positioning teeth gradually decreases from a first end thereof to a second end thereof, and a first end of each of the second positioning teeth faces the first spacing portion; a protective sleeve, the protective sleeve The inner wall of the end has a stop ring, and the stop ring has a slope. The highest point of the inclined surface is connected with the inner wall of the protective sleeve to form a stopping edge, and the stopping edge faces the rear end of the protective sleeve; the inner wall of the front end of the protective sleeve is provided with a pushing surface which is gradually expanded from the inside to the outside; the protection When the sleeve is sleeved on the outer wall of the syringe, the inclined block of the first positioning tooth of the locking ring blocks the pushing surface of the protective sleeve, and the protective sleeve is restrained on the syringe; the protective sleeve is pushed by the external force When the syringe is displaced to completely shield the needle body, the retaining ring of the protective sleeve and the first end of the second positioning tooth of the locking ring are opposite each other, and the bevel of the retaining ring of the protective sleeve and the locking The ramp blocks of the first positioning teeth of the ring are blocked from each other. The injection syringe safety protection device of claim 1, wherein the plurality of third positioning teeth are equally spaced from the rear portion of the inner wall of the annular body; the locking ring is coupled to the injection At the front end of the barrel, the third positioning tooth presses the outer wall of the front end portion to position the locking ring at the front end portion. The syringe safety protection device according to claim 2, wherein each of the third positioning teeth is formed by a bump and a bevel block, and a highest point of the bevel block is connected to the bump. The lowest point of the ramp block continues the inner wall of the annular body. The injection syringe safety protection device according to claim 3, wherein the inner wall of the rear end of the annular body has a ring-shaped tapered surface, and the lowest point of the inclined block of each of the third positioning teeth continues the tapered surface Minimum diameter. The syringe safety protection device according to claim 1, wherein an outer diameter of the front end of the syringe is smaller than an outer diameter of the syringe, and a stop edge is formed at a boundary between the front end and the syringe. The locking ring is coupled to the front end portion, and the stopping edge blocks the end edge of the locking ring. The syringe safety device according to claim 1, wherein the front end outer wall of the protective sleeve has a flange. The syringe safety protection device according to claim 1, wherein the inner wall of the protective sleeve is provided with a plurality of thin ribs at equal intervals in the direction of the parallel axis. The injection syringe safety protection device according to claim 7, wherein the front end of the plurality of thin ribs continues the maximum diameter portion of the pushing surface of the protective sleeve.