TW201607574A - Manually operated intravenous catheter set - Google Patents

Abstract

A manually operated intravenous catheter set, comprising a catheter fixation tube, a catheter provided in the catheter fixation tube, a puncture needle fixation tube movably sleeved on the catheter fixation tube, a puncture needle fixed to the puncture needle fixation tube, and a retaining ring seat fixed to the puncture needle fixation tube and surrounding the puncture needle. When the puncture needle fixation tube is in a needle retraction position, it will pull the puncture needle out of the catheter, making the puncture needle stay in the catheter fixation tube to avoid exposure, at the same time the retaining ring seat will be abutted against and engaged with the catheter fixation tube, so as to prevent mutual separation between the catheter fixation tube and the puncture needle fixation tube, thereby achieving efficacies of simple structure and easy assembly.

Description

Manual venous indwelling needle set

The invention relates to medical devices, and in particular to a manual venous indwelling needle set.

Intravenous injection is a medical procedure that injects blood, liquid medicine, nutrient solution or other medical fluid into the vein. It can be divided into two types: transient and continuous. The so-called transient intravenous injection (also known as common intravenous injection) The injection is to insert the needle directly into the vein of the patient to achieve the infusion effect, while the continuous intravenous injection (also known as the drip) is inserted into the vein of the patient by a vein indwelling needle, and then replaced with a replaceable needle. Or a supplemental medical fluid that allows the medical fluid to be continuously replenished into the patient's body.

Generally, the conventional intravenous indwelling needle has a metal needle and a set of soft indwelling needles arranged on the metal needle. During operation, the metal needle is inserted into the vein together with the soft indwelling needle by the hardness of the metal needle, and then the metal is extracted. The soft indwelling needle is left on the human body by the needle, and finally the soft indwelling needle is connected to the medical liquid required by the patient, so that the soft indwelling needle can provide a continuous infusion effect. However, after the metal needle is withdrawn, in order to prevent the metal needle from stabbing others, the caregiver must first use the sheath to cover the metal needle before discarding, but in the process of setting, it may still be due to personal negligence or improper external force. An accident caused by a metal needle stabbing in a collision. In order to solve the above problem, the safety indwelling needle disclosed in the CN100536944 patent uses a needle sleeve member and an extensible outer casing assembly to cover the entire metal needle, but the multi-layer sleeve design adopted in the conventional patent case may cause The structure has a problem of too many components and difficulty in assembly.

The main object of the present invention is to provide a manual venous indwelling needle set which is simple in structure and convenient to assemble, so as to increase the convenience in use.

In order to achieve the above object, the manual venous indwelling needle set of the present invention comprises an indwelling needle fixing barrel, an indwelling needle, a puncture needle fixing barrel, a puncture needle, and a positioning ring seat. One end of the indwelling needle fixing cylinder has a set of connecting portions and a first positioning concave portion adjacent to the socket portion, and the other end of the indwelling needle fixing cylinder has an outer flange and an adjacent outer flange a second positioning recess; the indwelling needle is detachably sleeved on the sleeve of the indwelling needle fixing cylinder; the puncture needle fixing cylinder is movably sleeved on the indwelling needle fixing cylinder; the puncture needle is fixed to the puncture needle One end of the barrel; the positioning ring seat is fixed to one end of the puncture needle fixing barrel and surrounds the puncture needle, and has a stopping step and at least one positioning elastic piece adjacent to the stopping step. Thereby, when the puncture needle fixing cylinder is located at the injection position, the puncture needle is located in the indwelling needle, so that the indwelling needle can be inserted into the vein of the patient by the hardness of the puncture needle, and the positioning ring The positioning elastic piece of the seat is embedded in the first positioning concave portion of the indwelling needle fixing cylinder, so that the positioning elastic piece of the positioning ring seat can maintain the elastic effect, and when the puncture needle fixing cylinder is located in the retracting position, the puncture needle will be Disengaging the indwelling needle and accommodating the indwelling needle fixing cylinder to avoid exposure, and further, the stopping step of the positioning ring seat abuts against the outer flange of the indwelling needle fixing cylinder to prevent the indwelling needle fixing cylinder Separating from the puncture needle fixing cylinder, and the positioning elastic piece of the positioning ring seat is embedded in the second positioning concave portion of the indwelling needle fixing cylinder to prevent the indwelling needle fixing cylinder from being subjected to an improper external force. Move so that the puncture needle can be surely held in the indwelling needle holding cylinder.

Preferably, the puncture needle fixing cylinder has an inner cylinder body and an outer cylinder body, one end of the inner cylinder body is connected to the puncture needle, and one end of the outer cylinder body is connected to the positioning ring seat, and further, the outer cylinder body surrounds An axial passage is formed between the inner cylinder and the inner cylinder, so that the needle fixing cylinder can be placed at the injection position and the retraction after the axial passage is sleeved on the indwelling needle fixing cylinder. The needle position moves relative to the indwelling needle holding cylinder.

Preferably, the puncture needle fixing cylinder and the positioning ring seat can be fixed together by snapping or ultrasonic welding.

Preferably, the outer peripheral surface of the outer cylinder of the puncture needle fixing cylinder may have a plurality of anti-slip ribs arranged side by side.

Preferably, the positioning ring seat has a hollow groove adjacent to the stopping step, and the positioning elastic piece is located in the hollow groove and extends obliquely from the stopping step toward the indwelling needle.

Referring to FIGS. 1 and 2, the manual venous indwelling needle set 10 of the present invention comprises an indwelling needle fixing cylinder 20, an indwelling needle 30, a puncture needle fixing cylinder 40, a puncture needle 50, and a positioning ring seat 60. .

One end of the indwelling needle fixing cylinder 20 has a connecting portion 21 and a first positioning concave portion 22 adjacent to the socket portion 21. The other end of the indwelling needle fixing cylinder 20 has an outer flange 23 and an adjacent convex portion. The second positioning recess 24 of the rim 23.

The indwelling needle 30 is made of a soft material such as rubber, and is sleeved on the socket portion 21 of the indwelling needle fixing cylinder 20 at the time of assembly.

The puncture needle fixing cylinder 40 has an inner cylinder 41 and an outer cylinder 42. As shown in Figs. 3 and 4, the outer cylinder 42 surrounds the circumference of the inner cylinder 41 to form an axis with the inner cylinder 41. To the channel 43, the puncture needle fixing cylinder 40 is sleeved in the indwelling needle fixing cylinder 20 by the axial passage 43 during assembly, so that the inner cylinder 41 is housed in the indwelling needle fixing cylinder 20, and after the setting, the puncture needle The fixed cylinder 40 is movable relative to the indwelling needle holding cylinder 20 between an injection position P1 and a withdrawal position P2. Further, as shown in Fig. 2, one end of the outer tubular body 42 of the puncture needle fixing cylinder 40 has two opposite locking portions 44, and the outer peripheral surface of the outer cylindrical body 42 of the puncture needle fixing cylinder 40 has a plurality of side by side arrangement. The sliding ribs 45 are adjacent to the two latching portions 44.

One end of the puncture needle 50 is fixed to one end of the inner cylinder 41 of the puncture needle fixing cylinder 40. When the puncture needle fixing cylinder 40 is located at the injection position P1 as shown in FIG. 3, the puncture needle 50 is inserted into the indwelling needle 30. When the puncture needle fixing cylinder 40 is located at the needle withdrawal position P2 shown in FIG. 4, the puncture needle 50 is separated from the indwelling needle 30 and accommodated in the indwelling needle fixing cylinder 20.

As shown in FIG. 2, the positioning ring seat 60 has a large ring portion 61 and a small ring portion 62. The large ring portion 61 is connected to one end surface of the small ring portion 62 to form a stop step with the small ring portion 62. The small ring portion 62 has two hollow slots 64 and two positioning elastic pieces 65. The two hollow slots 64 are disposed adjacent to the blocking step 63 and are oppositely disposed. The two positioning elastic pieces 65 are respectively located in a hollow groove 64 and respectively The self-stopping step 63 is obliquely extended toward the indwelling needle 30 (as shown in FIG. 3), whereby the positioning ring holder 60 is positioned when the puncture needle fixing cylinder 40 is located at the injection position P1 as shown in FIG. The positioning elastic piece 65 is embedded in the first positioning concave portion 22 of the indwelling needle fixing cylinder 20. When the puncture needle fixing cylinder 40 is located at the retracting position P2 as shown in FIG. 4, the positioning elastic piece 65 of the positioning ring base 60 is embedded. In the second positioning recess 24 of the indwelling needle fixing cylinder 20. In addition, as shown in FIG. 2, the small ring portion 62 of the positioning ring base 60 has two latching slots 66 oppositely disposed on the blocking step portion 63. The positioning ring seat 60 is buckled by the two latching slots 66. The latching portion 44 of the tubular body 42 is attached to the outer tubular body 42 of the puncture needle fixing cylinder 40. However, it should be additionally noted that the positioning ring seat 60 can also be combined by ultrasonic welding. The outer body of the barrel 42 is fixed by the puncture needle fixing cylinder 40. At this time, the arrangement of the buckle portion 44 and the snap groove 66 is not required.

According to the above configuration, when the injection is to be performed, the puncture needle fixing cylinder 40 is first held at the injection position P1 as shown in FIG. 3, so that the indwelling needle 30 can pierce the skin by the hardness of the puncture needle 50, and the positioning at this time. The positioning elastic piece 65 of the ring seat 60 is embedded in the first positioning concave portion 22 of the indwelling needle fixing cylinder 20 to bear against the indwelling needle fixing cylinder 20, so that the puncture needle 50 does not retract into the indwelling needle during piercing the skin. 30, maintaining a good elastic effect, after the indwelling needle 30 is smoothly inserted into the vein, the indwelling needle 20 is then fixed, and the puncture needle fixing cylinder 40 is pulled back, so that the puncture needle 50 is driven by the puncture needle fixing cylinder 40. When the indwelling needle 30 is withdrawn, as shown in FIG. 5, until the stopping step portion 63 of the positioning ring seat 60 abuts against the flange 23 of the indwelling needle fixing cylinder 20, the puncture needle fixing cylinder 40 is located at the retracting position P2. At this time, the positioning elastic piece 65 of the positioning ring seat 60 is embedded in the second positioning concave portion 24 of the indwelling needle fixing cylinder 20, so that the puncture needle fixing cylinder 40 can no longer be pushed forward to ensure that the puncture needle 50 can be completely accommodated. In the indwelling needle fixing cylinder 20 without being exposed, this time The indwelling needle 30 is separated from the indwelling needle fixing cylinder 20, the puncture needle 50, and the puncture needle fixing cylinder 40. As shown in Fig. 6, the indwelling needle 30 remaining on the patient's body can be used with the medical liquid required by the patient. Make further connections.

In summary, the manual venous indwelling needle set 10 of the present invention is slidably designed by the puncture needle fixing cylinder 40, and then matched with the positioning elastic piece 65 of the positioning ring seat 60 and the first and second positioning of the indwelling needle fixing cylinder 20. The inlaid relationship between the recesses 22, 24 and the latching relationship between the stop step 63 of the retaining ring seat 60 and the outer flange 23 of the indwelling needle retaining cylinder 20 make the present invention more compact than conventional techniques. Structure. Furthermore, the user can simultaneously collect the puncture needle 50 into the indwelling needle fixing cylinder 20 in the process of disassembling the indwelling needle 30, thereby achieving the effect of one step operation, and being simple and convenient to use, thereby achieving the object of the present invention. .

10‧‧‧Manual venous indwelling needle set
20‧‧‧Indwelling needle fixing cylinder
21‧‧‧ Sockets
22‧‧‧First positioning recess
23‧‧‧Outer flange
24‧‧‧Second positioning recess
30‧‧‧Indwelling needle
40‧‧‧Puncture needle fixing tube
41‧‧‧Inner cylinder
42‧‧‧Outer cylinder
43‧‧‧Axial passage
P1‧‧‧ injection location
P2‧‧‧Retraction position
44‧‧‧Snaps
45‧‧‧Slip ribs
50‧‧‧Puncture needle
60‧‧‧ positioning ring seat
61‧‧‧The Great Ring Department
62‧‧‧Small ring department
63‧‧‧stop step
64‧‧‧ empty slots
65‧‧‧ Positioning shrapnel
66‧‧‧Snap slot

Figure 1 is a perspective view of the present invention. Figure 2 is an exploded perspective view of the present invention. Fig. 3 is a sectional view showing the combination of the present invention, mainly showing the state in which the puncture needle fixing cylinder is located at the injection position. The fourth figure is similar to the third figure, and mainly shows the state in which the puncture needle fixing cylinder is located at the needle withdrawal position. Fig. 5 is a partial enlarged view of Fig. 4. Fig. 6 is similar to Fig. 4, and mainly shows the state in which the indwelling needle is removed from the indwelling needle fixing cylinder.

10‧‧‧Manual venous indwelling needle set

20‧‧‧Indwelling needle fixing cylinder

21‧‧‧ Sockets

22‧‧‧First positioning recess

23‧‧‧Outer flange

24‧‧‧Second positioning recess

30‧‧‧Indwelling needle

40‧‧‧Puncture needle fixing tube

41‧‧‧Inner cylinder

42‧‧‧Outer cylinder

44‧‧‧Snaps

45‧‧‧Slip ribs

50‧‧‧Puncture needle

60‧‧‧ positioning ring seat

61‧‧‧The Great Ring Department

62‧‧‧Small ring department

63‧‧‧stop step

64‧‧‧ empty slots

65‧‧‧ Positioning shrapnel

66‧‧‧Snap slot

Claims (6)

A manual venous indwelling needle set comprises: an indwelling needle fixing cylinder, one end of the indwelling needle fixing cylinder has a set of connecting portions and a first positioning concave portion adjacent to the socket portion, the indwelling needle fixing cylinder The other end has an outer flange and a second positioning recess adjacent to the outer flange; an indwelling needle detachably sleeved on the sleeve of the indwelling needle fixing cylinder; An injecting needle fixing cylinder is movably disposed between an injection position and a retracting position; a puncture needle is fixed to one end of the puncture needle fixing cylinder; and a positioning ring seat is disposed at one end of the puncture needle fixing cylinder And surrounding the puncture needle, the positioning ring seat has a stopping step and at least one positioning elastic piece adjacent to the stopping step; wherein when the puncture needle fixing cylinder is located at the injection position, the puncture needle is located In the indwelling needle, the positioning elastic piece of the positioning ring seat is embedded in the first positioning concave portion of the indwelling needle fixing cylinder. When the puncture needle fixing cylinder is located in the retracting needle position, the puncture needle is disengaged from the indwelling needle and located therein. The indwelling needle is fixed in the cylinder, and the Stop-order bit portion of the seat ring against the outside of the indwelling needle cylinder flange is fixed, the positioning of the ring carrier positioning tabs embedded in the second positioning recess portion of the fixed cylinder indwelling needle. The manual venous indwelling needle set according to claim 1, wherein the puncture needle fixing cylinder has an inner cylinder body and an outer cylinder body, and the outer cylinder body surrounds the inner cylinder body and the inner cylinder body Forming an axial passage, the puncture needle fixing cylinder is sleeved on the indwelling needle fixing cylinder by the axial passage, and the puncture needle is fixed to one end of the inner cylinder of the puncture needle fixing cylinder, and the positioning ring seat is fixed to The puncture needle fixes one end of the outer cylinder of the cylinder. The manual venous indwelling needle set according to claim 2, wherein one end of the outer cylinder of the puncture needle fixing cylinder has a buckle portion, the positioning ring seat has a snap groove, and the positioning ring seat is provided by the card The buckle groove is fastened to the buckle portion of the outer cylinder of the puncture needle fixing cylinder. The manual venous indwelling needle set according to claim 2, wherein the outer cylinder of the puncture needle fixing cylinder and the positioning ring seat are ultrasonically welded together. The manual venous indwelling needle set according to claim 2, wherein the outer peripheral surface of the outer cylinder of the puncture needle fixing cylinder has a plurality of anti-slip ribs arranged side by side. The manual venous indwelling needle set according to claim 1, wherein the positioning ring seat has a hollowing groove adjacent to the stopping step, and the positioning elastic piece is located in the hollowing groove and faces the blocking step The direction of the indwelling needle extends obliquely.