TWM538818U - Rotary safety syringe - Google Patents

Description

Rotary safety syringe

This creation is related to a safety syringe, especially a rotary safety syringe that can be easily mixed.

A syringe is an instrument used to inject a liquid such as a liquid, a blood, or a nutrient solution into a human body in conjunction with a needle. After the injection is completed, since the needle is already contaminated with blood from the human body, the used needle must be safely treated to prevent the medical staff or others from being stabbed by the needle. In the early stage of safe handling, the needle was inserted into a needle cover for storage. However, during the insertion process, the medical staff may accidentally penetrate the medical treatment because of carelessness or other external force pushing. The hand of the person, which in turn increases the risk of accidental infection of the medical staff, has led to the so-called safety syringe to reduce the chance of the medical staff directly touching the needle by hand.

In the case of a safety syringe that is traditionally operated in a push-pull manner, only one medicament can be injected at a time, and there is no way for the medical staff to mix different medicaments for use, which may cause problems for the medical staff. In addition, during the injection process, the needle holder can easily fall off due to the pressure from the injection putter, which not only causes the leakage of the medicament, but also poses a certain degree of risk to the patient. From this, it can be seen that the push-pull safety syringe has a structural improvement.

The main purpose of this creation is to provide a rotary safety syringe that facilitates the mixing of medical personnel to increase the convenience of use.

In order to achieve the above object, the rotary safety syringe of the present invention comprises an outer cylinder, a needle holder, a linkage seat and a push rod. The outer cylinder has a barrel body and a fixed end portion, and an inner peripheral surface of one end of the barrel body has an inner flange, and the fixed end portion is connected to one end of the barrel body and adjacent to the inner flange of the barrel body; The needle holder is movable along the axial direction of the outer cylinder and is not rotatably disposed relative to the outer cylinder at a fixed end of the outer cylinder, the needle holder has a first shaft hole; the linkage seat is at a positioning position Rotatingly disposed between the release seat and the release seat, and the outer periphery of the linkage has an outer flange. When the linkage is in the positioning position, the outer flange of the linkage is engaged An inner flange of the barrel body, the positioning seat is positioned on the outer tube, and when the connecting seat is in the releasing position, the outer flange of the connecting seat is disengaged from the inner flange of the barrel of the outer tube, so that The linkage seat can release the positioning relationship with the outer cylinder. Further, the linkage seat has a second shaft hole and a first clamping portion. The second shaft hole is coaxially communicated with the first shaft hole of the needle holder. The first engaging portion is disposed on the hole wall of the second shaft hole; the push rod is movable along the axial direction of the outer tube and Rotatingly disposed in the outer cylinder between a non-engagement position and an engagement position, the push rod has a head that is disposed through the first shaft hole of the needle holder and the linkage seat a second shaft hole, and the outer peripheral surface of the rod head has a second engaging portion, and when the pushing rod is located at the non-engaging position, the second engaging portion of the pushing rod is firstly engaged with the connecting seat The parts are separated from each other, so that the push rod can move along the axial direction of the outer tube relative to the needle holder and the linkage seat, and the push rod can be repeatedly pushed and pulled to achieve the mixed medicine effect, when the push rod is located When the position is engaged, the second engaging portion of the push rod and the first engaging portion of the connecting seat are engaged with each other, so that the push rod can drive the connecting seat from the positioning position to the releasing position. By pulling the push rod, the needle holder can be pulled back into the outer tube together with the needle provided in the needle holder through the linkage to increase the safety after the injection is completed.

In the present invention, the needle holder has a positioning recess, and the coupling portion has a shaft portion. The shaft portion is disposed in the first shaft hole of the needle holder and has a positioning convex portion. The positioning convex portion is engaged with the positioning portion. The positioning recess of the needle holder enables the linkage to be fixed with the needle holder and rotatable relative to the needle holder.

In the present invention, the first engaging portion of the connecting seat has a first receiving wall, a first tapered wall and a blocking wall, and the first tapered wall is connected to one side of the first receiving wall and faces One end of the retaining wall is connected to the opposite side of the first receiving wall, and the second engaging portion of the needle seat has a second receiving wall and a second a tapered wall connected to one side of the second receiving wall and extending in a tapered manner away from the second receiving wall. Thereby, when the push rod is located at the engaging position, the second receiving wall of the second engaging portion of the push rod is opposite to the first receiving wall of the first engaging portion of the connecting seat and abuts the linkage The retaining wall of the first engaging portion of the seat enables the push rod to drive the connecting seat to rotate together.

In the present invention, the inner peripheral surface of the fixed end portion of the outer cylinder has a plurality of ribs, and the outer peripheral surface of the needle holder has a plurality of rib grooves, and the ribs and the rib grooves are engaged with each other, so that The needle holder can only move along the axial direction of the outer cylinder and cannot rotate relative to the outer cylinder.

The detailed construction, features, assembly or use of the rotary safety syringe provided by this creation will be described in the detailed description of the subsequent embodiments. However, those of ordinary skill in the art should understand that the detailed description and specific embodiments of the present invention are merely used to illustrate the present invention and are not intended to limit the scope of the patent application.

Referring to FIG. 1 , the rotary safety syringe 10 of the first embodiment of the present invention comprises an outer cylinder 20 , a needle holder 30 , a linkage 40 , and a push rod 50 .

The outer cylinder 20 has a barrel body 21 and a fixed end portion 22. The inner peripheral surface of the bottom end of the barrel body 21 has an inner flange 23, and the fixed end portion 22 is connected to the bottom end of the barrel body 21 and adjacent to the barrel body 21. Inner flange 23. The inner peripheral surface of the bottom end of the fixed end portion 22 has a plurality of ribs 24 which are arranged at annular intervals centering on the axial direction of the outer cylinder 20, and each of the ribs 24 is along the axial direction of the outer cylinder 20. extend.

As shown in FIGS. 1 and 3, the needle holder 30 has a body 31, a tube portion 32, and a first shaft hole 33 penetrating the seat body 31 and the tube portion 32. The outer peripheral surface of the bottom end of the seat body 31 has a plurality of rib grooves 34 which are arranged at an annular interval centering on the first shaft hole 33, and each of the rib grooves 34 is along the first shaft hole 33. The outer peripheral surface of the top end of the base body 31 has a recessed groove 35 for inserting a first leakage preventing washer 12, and the top end of the base body 31 forms a positioning recess 36 in the hole wall of the first shaft hole 33. In addition, the seat body 31 has a receiving groove 37, and the receiving groove 37 is recessed from the bottom surface of the seat body 31. The groove wall of the receiving groove 37 has an internal thread portion 38, so that the needle seat 30 can be threaded by the internal thread portion. 38 is combined with a screw-in needle (not shown). One end of the tube portion 32 is connected to the seat body 31 and is located in the recess 37 of the base body 31. The other end of the tube portion 32 is located outside the pocket 37 for outputting the liquid medicine to the screw needle.

When assembled, the needle hub 30 is disposed in the fixed end portion 22 of the outer cylinder 20, and is engaged with the rib 24 of the fixed end portion 22 of the outer cylinder 20 by the rib groove 34, so that the needle holder 30 can only be along The outer cylinder 20 moves axially and cannot rotate relative to the outer cylinder 20.

However, it is worth mentioning that, in order to cooperate with different types of needles, the needle holder can have different structural designs. As shown in Figures 9 and 10, the needle holder 60 has a body 61, a tube portion 62 and a through-body 61. With the first shaft hole 63 of the pipe portion 62, the outer peripheral surface of the bottom end of the seat body 61 has a plurality of rib grooves 64. The top end of the seat body 61 forms a positioning recess 65 in the hole wall of the first shaft hole 63, and the pipe portion 62 is connected. The bottom end of the seat body 61 is located outside the outer tube 20, so that the needle holder 60 can be coupled to the set of needles (not shown) through the tube portion 62.

As shown in FIGS. 2 to 4, the interlocking seat 40 has a disk portion 41 and a shaft portion 42. The outer peripheral surface of the disk portion 41 has four outer flanges 44 arranged at equal intervals. One end of the shaft portion 42 is connected to the disk portion 41, and the other end of the shaft portion 42 has a positioning convex portion 45. During assembly, the coupling 40 is inserted into the first shaft hole 33 of the needle holder 30 by the shaft portion 42 , and the positioning convex portion 45 of the linkage 40 is engaged with the positioning recess 36 of the needle holder 30 to complete the two. During the assembly, the linkage 40 can be rotated relative to the needle holder 30 between a positioning position P1 (as shown in FIG. 3) and a release position P2 (shown in FIG. 8) when the linkage 40 is positioned. At the position P1, the flange 44 of the carrier 40 is engaged with the inner flange 23 of the barrel 21 of the outer cylinder 20. At this time, the carrier 40 is positioned in the outer cylinder 20, and when the linkage 40 is at the releasing position P2, The flange 44 of the outer sleeve 40 is disengaged from the inner flange 23 of the barrel 21 of the outer cylinder 20. At this time, the linkage 40 can drive the needle holder 30 along the outer cylinder 20 by the engagement relationship with the needle holder 30. The axial movement.

In addition, the connecting frame 40 further has a second shaft hole 43 and a plurality of first engaging portions 46. The second shaft hole 43 extends through the disk portion 41 and the shaft portion 42 and coaxially communicates with the first shaft hole 33 of the needle holder 30. The first engaging portion 46 is disposed on the hole wall of the second shaft hole 43 and is arranged at an annular interval around the second shaft hole 43. As shown in FIG. 2, the first engaging portion 46 has a first receiving wall. 47. A first tapered wall 48 and a retaining wall 49. The first tapered wall 48 is connected to the top surface of the first receiving wall 47 and extends in a direction away from the first receiving wall 47. The retaining wall 49 It is connected to one end of the bottom surface of the first receiving wall 47 and extends along the axial direction of the outer cylinder 20.

The push rod 50 has a shaft 51 and a head 52 connecting the shaft 51. The outer surface of the head 52 has a plurality of second engaging portions 53. The second engaging portion 53 is centered on the axial direction of the push rod 50. Arranged at an annular interval, and as shown in FIG. 2, the second engaging portion 53 has a second receiving wall 54 and a second tapered wall 55, and the second tapered wall 55 is coupled to the second receiving wall 54. The bottom surface extends in a tapered manner away from the second receiving wall 54. In addition, a second leakage preventing washer 14 is sleeved on the outer peripheral surface of the head 52.

In actual operation, as shown in FIGS. 3 and 4, the push rod 50 is first held at a non-engagement position P3, and when the push rod 50 is at the non-engagement position P3, the second engaging portion 53 of the push rod 50 is And the first latching portion 46 of the linkage 40 is offset from each other, and then the head 52 of the push rod 50 is inserted into the first shaft hole 33 of the needle holder 30 and the second shaft hole 43 of the linkage seat 40, The lever head 52 of the push rod 50 and the linkage seat 40 are not engaged with each other, so the push rod 50 at this time can move up and down along the axial direction of the outer cylinder 20 with respect to the needle holder 30 and the linkage holder 40, thereby The person can repeatedly pull up and push down the push rod 50 to achieve the effect of mixing medicine.

After the mixing is completed, the head 52 of the push rod 50 is inserted into the first shaft hole 33 of the needle holder 30 from the second shaft hole 43 of the coupling seat 40 in the non-engagement position P3 to complete the injection, and then the injection is completed. As shown in FIGS. 5 and 6, the push rod 50 is rotated to an engaging position P4. When the push rod 50 is at the engaging position P4, the second receiving wall 54 of the second engaging portion 53 of the push rod 50 is opposite. The first receiving wall 47 of the first engaging portion 46 of the connecting seat 40, and the second receiving wall 54 of the second engaging portion 53 of the push rod 50 abuts against the first engaging portion 46 of the connecting seat 40. The wall 49 completes the engagement between the head 52 of the push rod 50 and the linkage 40, and then continues to apply the force to rotate the push rod 50. As shown in Fig. 7, the push rod 50 will pass the card with the linkage 40. The connection causes the linkage 40 to rotate from the positioning position P1 (shown in FIG. 3) to the release position P2 (as shown in FIG. 8), thereby releasing the positioning effect of the linkage 40, and the pusher 50 can be started at this time. Apply pull back strength.

In the process of pulling back the push rod 50, as shown in FIG. 8, the second engaging portion 53 of the head 52 of the push rod 50 pushes the first engaging portion 46 of the connecting seat 40 by the second receiving wall 54. The first receiving wall 47 moves the linkage 40 by the push rod 50 and moves away from the needle holder 30. Then, during the movement of the linkage 40, the linkage 40 is positioned by the positioning projection 45 and the needle holder 30. The positioning recesses 36 are snapped together, so the needle holder 30 will move together with the linkage 40. In this case, as long as the pusher 50 is continuously pulled back, the needle holder 30 can be brought together with the needle under the tension of the linkage 40. It is returned to the inside of the barrel 21 of the outer cylinder 20 to achieve the storage effect.

In summary, the rotary safety syringe 10 of the present invention can minimize the pressure on the needle holder 30 during the injection process, so as to achieve the purpose of improving structural stability, and by using the push rod 50 after the injection is completed. The simple operation can release the snap-fit relationship between the flange 44 of the outer sleeve 40 and the inner flange 23 of the outer cylinder 20, so that the needle holder 30 can be easily stored for the purpose of increasing the safety of use.

"First Embodiment"
10‧‧‧Rotary safety syringe
12‧‧‧First leak-proof gasket
14‧‧‧Second leak proof washer
20‧‧‧Outer tube
21‧‧‧
22‧‧‧Fixed end
23‧‧‧ inner flange
24‧‧‧ rib
30‧‧‧Needle seat
31‧‧‧
32‧‧‧ Department of Management
33‧‧‧First shaft hole
34‧‧‧ rib groove
35‧‧‧Inlay
36‧‧‧ positioning recess
37‧‧‧ 容容
38‧‧‧Threaded Department
40‧‧‧Liandong
41‧‧‧Parts
42‧‧‧Axis
43‧‧‧Second shaft hole
44‧‧‧Outer flange
45‧‧‧ positioning convex
P1‧‧‧Location
P2‧‧‧Release position
46‧‧‧First card joint
47‧‧‧First wall
48‧‧‧First tapered wall
49‧‧ ‧ retaining wall
50‧‧‧Put
51‧‧‧ shaft
52‧‧‧ head
53‧‧‧Second card joint
54‧‧‧Second wall
55‧‧‧Second tapered wall
P3‧‧‧ non-engaged position
P4‧‧‧ Engagement Position "Second Embodiment"
60‧‧‧ needle seat
61‧‧‧ body
62‧‧‧ Department of Tubes
63‧‧‧First shaft hole
64‧‧‧ rib groove
65‧‧‧ positioning recess

Fig. 1 is a plan sectional view showing the rotary safety syringe provided in the first embodiment of the present invention. Fig. 2 is a plan sectional view showing the push rod and the interlocking seat provided in the first embodiment of the present invention. Fig. 3 is a sectional view showing the combination of the rotary safety syringe provided in the first embodiment of the present invention, mainly showing the linkage seat at the positioning position. Fig. 4 is a bottom view of the push rod and the linkage seat provided in the first embodiment of the present invention, mainly showing that the push rod is located at the non-engagement position. Figure 5 is similar to Figure 3 and mainly shows that the push rod is rotated to the engaged position. Figure 6 is similar to Figure 4 and shows the push rod rotated to the engaged position. Figure 7 is similar to Figure 6, which mainly shows that the linkage is in the release position. Fig. 8 is similar to Fig. 5 and mainly shows the state in which the needle holder is pulled back into the outer cylinder. Fig. 9 is a plan sectional view showing the needle holder provided in the second embodiment of the present invention. Figure 10 is a plan sectional view showing the rotary safety syringe provided in the second embodiment of the present invention.

10‧‧‧Rotary safety syringe

14‧‧‧Second leak proof washer

20‧‧‧Outer tube

21‧‧‧

22‧‧‧Fixed end

23‧‧‧ inner flange

24‧‧‧ rib

30‧‧‧Needle seat

31‧‧‧

32‧‧‧ Department of Management

33‧‧‧First shaft hole

34‧‧‧ rib groove

35‧‧‧Inlay

36‧‧‧ positioning recess

37‧‧‧ 容容

38‧‧‧Threaded Department

40‧‧‧Liandong

43‧‧‧Second shaft hole

44‧‧‧Outer flange

45‧‧‧ positioning convex

50‧‧‧Put

51‧‧‧ shaft

52‧‧‧ head

Claims (13)

A rotary safety syringe includes: an outer cylinder having a barrel body and a fixed end portion, the inner circumference of one end of the barrel body having an inner flange, the fixed end portion being connected to one end of the barrel body And adjacent to the inner flange of the barrel; a needle holder movable along the axial direction of the outer cylinder and not rotatably disposed relative to the outer cylinder at a fixed end of the outer cylinder, the needle holder having a first a shaft hole; a movable seat is rotatably disposed on the needle seat between a positioning position and a releasing position, and the outer peripheral surface of the connecting seat has an outer flange, when the connecting seat is located at the positioning position, The flange outside the carrier is engaged with the inner flange of the barrel of the outer cylinder. When the linkage is in the release position, the outer flange of the linkage is separated from the inner flange of the barrel of the outer cylinder. The first movable portion has a second shaft hole and a first engaging portion, the second shaft hole is coaxially communicated with the first shaft hole of the needle seat, and the first engaging portion is disposed on the hole wall of the second shaft hole; And a push rod movable along the axial direction of the outer cylinder and rotatable between a non-engaged position and a engaged position The push rod has a head that is disposed in the first shaft hole of the needle seat and the second shaft hole of the linkage seat, and the outer circumference of the head The second engaging portion has a second engaging portion, and the second engaging portion of the push rod is separated from the first engaging portion of the connecting seat, so that the push rod can be along the outer The axial direction of the cylinder moves relative to the needle holder and the linkage seat. When the push rod is located at the engaging position, the second engaging portion of the push rod and the first engaging portion of the connecting seat are engaged with each other, so that the The push rod can drive the linkage from the positioned position to the released position. The rotary safety syringe according to claim 1, wherein the needle holder has a positioning recess, the linkage has a shaft portion, the shaft portion is disposed in the first shaft hole of the needle holder and has a positioning convex portion. The positioning protrusion is engaged with the positioning recess of the needle holder. The rotary safety syringe according to claim 2, wherein the linkage seat further has a disk portion, the outer peripheral surface of the disk portion has the outer flange, and one end of the shaft portion is connected to the disk portion, and the shaft portion is another One end has the positioning protrusion, and the second shaft hole penetrates the disk portion and the shaft portion. The rotary safety syringe of claim 1, wherein the first engaging portion of the connecting seat has a first receiving wall, a first tapered wall and a blocking wall, wherein the first tapered wall is connected to the One side of the first receiving wall extends in a direction away from the first receiving wall, and one end of the blocking wall is connected to the other opposite side of the first receiving wall, and the second engaging portion of the needle seat Having a second receiving wall and a second tapered wall, the second tapered wall is connected to one side of the second receiving wall and extends in a direction away from the second receiving wall, when the push rod is located When the position is engaged, the second receiving wall of the second engaging portion of the push rod is opposite to the first receiving wall of the first engaging portion of the connecting seat and abuts the first engaging portion of the connecting seat Block the wall. The rotary safety syringe according to claim 1, wherein the inner peripheral surface of the fixed end portion of the outer cylinder has a plurality of ribs arranged at intervals, and the outer peripheral surface of the needle holder has a plurality of ribs arranged at intervals The groove, the plurality of ribs and the plurality of rib grooves are engaged with each other. The rotary safety syringe according to claim 1, wherein the needle holder has a body and a tube portion, the first shaft hole extends through the seat body and the tube portion, and the seat body has a cavity, the cavity The groove wall has an internal threaded portion, and one end of the tubular body is connected to the seat body and is located in a cavity of the seat body, and the other end of the pipe body is located outside the cavity. The rotary safety syringe according to claim 6, wherein the inner peripheral surface of the fixed end portion of the outer cylinder has a plurality of ribs arranged at intervals, and the outer peripheral surface of the seat body of the needle holder has a plurality of intervals The rib groove, the plurality of ribs and the plurality of rib grooves are engaged with each other. The rotary safety syringe according to claim 6, wherein one end of the seat body of the needle holder has a positioning recess, the linkage seat has a shaft portion, and the shaft portion is disposed in the first shaft hole of the needle holder The positioning protrusion has a positioning convex portion that is engaged with the positioning concave portion of the needle holder. The rotary safety syringe according to claim 8, wherein the coupling seat further has a disk portion, the outer peripheral surface of the disk portion has the outer flange, and one end of the shaft portion is connected to the disk portion, and the shaft portion is another One end has the positioning protrusion, and the second shaft hole penetrates the disk portion and the shaft portion. The rotary safety syringe according to claim 1, wherein the needle holder has a body and a tube portion, the first shaft hole penetrates the base body and the tube portion, and one end of the tube portion is connected to one end of the seat body . The rotary safety syringe according to claim 10, wherein the inner peripheral surface of the fixed end portion of the outer cylinder has a plurality of ribs arranged at intervals, and the outer peripheral surface of the seat body of the needle holder has a plurality of intervals The rib groove, the plurality of ribs and the plurality of rib grooves are engaged with each other. The rotary safety syringe according to claim 10, wherein the seat body of the needle holder has a positioning recess with respect to one end of the tube portion, the linkage seat has a shaft portion, and the shaft portion is disposed in the needle holder A positioning hole is formed in the shaft hole, and the positioning protrusion is engaged with the positioning recess of the needle holder. The rotary safety syringe according to claim 12, wherein the coupling seat further has a disk portion, the outer peripheral surface of the disk portion has the outer flange, and one end of the shaft portion is connected to the disk portion, and the shaft portion is another One end has the positioning protrusion, and the second shaft hole penetrates the disk portion and the shaft portion.