CN211272851U - A self-locking safety needle for infusion port - Google Patents

Abstract

The utility model discloses a self-locking safety needle used in an infusion port. The self-locking safety needle includes a needle lock box, the needle lock box includes a box body, the lower surface of the box body is attached to the skin and is close to the infusion port implanted under the skin, the inside of the box body is hollow to form a cavity, and the upper and lower surfaces of the box body respectively form a needle outlet The needle tip of the drug delivery needle passes through the needle outlet hole at the lower end to communicate with the infusion port. One end of the upper cavity wall of the box body extends vertically downward to form a positioning block. On the side cavity wall, the lower end of the elastic plate of the elastic seat is inclined and connected to the upper end of the bottom plate. One end is connected to the dosing needle, and the other end of the connecting line is connected to the bottom plate through the cable channel. The utility model has the effects that the needle tip of the administration needle is locked after the needle is pulled out, so as to avoid accidental stab wounds, prevent microbial infectious diseases such as related viruses, and the needle is pulled out quickly and safely.

Description

A self-locking safety needle for infusion port

technical field

The utility model relates to the field of medical instruments, in particular to a self-locking safety needle used in an infusion port.

Background technique

In the existing infusion field, long-term infusion is generally used in the infusion port, and when the drug delivery needle is pulled out, because the needle is perpendicular to the infusion port, it requires a large force to pull out the needle. In this operation, the movement range is too large. Or the movement is out of control, which is easy to injure the operator or the accompanying staff around, and the patients who need the infusion port are mostly virus carriers or patients with blood-borne related diseases. When it reaches the relevant personnel, it is easy to cause infection.

Utility model content

In order to solve one or more of the above problems, the present invention provides a self-locking safety needle for an infusion port.

According to one aspect of the present invention, the self-locking safety needle for an infusion port includes a drug delivery needle, a needle locking box, an elastic seat and a connecting wire,

The needle lock box includes a box body, the lower surface of the box body is close to the infusion port implanted under the skin, the inside of the box body is hollow to form a cavity, the upper and lower surfaces of the box body are respectively formed with needle holes, and the needle tip of the drug administration needle passes through the lower end The needle outlet hole is connected to the infusion port, one end of the upper cavity wall of the box body vertically extends downward to form a positioning block, and the wiring channel is arranged on the other end of the upper cavity wall of the box body and the connected side cavity wall,

The elastic seat includes a bottom plate and an elastic plate. The lower end of the elastic plate is inclined and connected to the upper end of the bottom plate. The bottom plate is provided with a lower through hole, and the elastic plate is provided with a pin hole. The elastic seat is located in the cavity. One end of the line is connected to the drug administration needle, and the other end of the connecting line is connected to the bottom plate through the wiring path.

When the elastic plate is compressed and fits the lower surface of the positioning block, the lower end of the administration needle can pass through the upper needle outlet hole, the needle passage hole, the lower through hole and the lower needle outlet hole in turn to connect to the infusion port for administration, and the connecting line is routed. Loose settings in the channel,

When the user fixes the needle lock box with one hand and pulls up the administration needle with the other hand, the connecting wire is gradually tightened and straightened in the thread path, and the connecting wire pulls the bottom plate to move to the other end. Disengaged from the positioning block and elastically expanded to fit the lower cavity wall of the cavity, the drug delivery needle is always located in the cavity.

The self-locking safety needle for an infusion port is connected by a drug delivery needle and an elastic seat. When the drug delivery needle is pulled out, the elastic seat is displaced, the elastic seat simultaneously seals the needle outlet hole at the lower end, and the drug delivery needle The needle tip is closed in the cavity, and the needle does not slide out of the lock needle box when it is pulled out, so it is avoided that the needle accidentally stabs the medical staff or the accompanying personnel, and prevents the infection of microbial infectious diseases such as related viruses. , improve safety, and at the same time, the device is easy to operate, which can reduce the experience and technical requirements of medical staff to operate dangerous instruments, greatly improve the speed and technology of needle extraction, and facilitate large-scale popularization and application. Secondly, because of the length of the connecting line to control drug delivery The uppermost position of the needle has high control precision and no accidents; thirdly, the elastic seat has a positioning block when it is compressed, and when it is fully expanded, the upper end touches the upper cavity wall, both states are fixed, and the upper and lower positions can be effectively controlled , so as to improve the safety self-locking ability.

In some embodiments, the elastic seat further includes a stop plate, the stop plate is vertically connected to the other end of the bottom plate, and the stop plate is located on the upper and lower ends of the elastic plate.

In some embodiments, the bottom plate, the spring plate and the stop plate are integrated structures or the bottom plate, the spring plate and the stop plate are connected by an adhesive.

In some embodiments, the spring plate is a polyurethane elastic rubber. The beneficial effects are: the elastic plate of the material is convenient to process, has good elastic properties, and does not affect the operation of the patient's nuclear magnetic resonance.

In some embodiments, the lower cavity wall of the box body is further provided with a moving channel. The width of the moving channel and the bottom plate is the same. A full-length slideway is formed in the middle of the side wall and the limit plate, and the width of the slideway and the elastic plate is matched with clearance.

In some embodiments, balls are installed on the lower surface of the bottom plate, and the balls fit against the lower cavity wall of the box body.

In some embodiments, the wire routing channel includes a longitudinal channel and a transverse channel that communicate with each other, the longitudinal channel is located in the side cavity wall of the box body, the lower end of the longitudinal channel extends toward the inner surface of the side cavity wall of the box body to form a lower wire hole, and the inner end of the transverse channel is located in the side cavity wall of the box body. The upper surface of the upper cavity wall of the box body extends to form an upper wire hole, and the connecting wire passes through the upper wire hole, the horizontal channel, the longitudinal channel and the lower wire hole to connect to the bottom plate.

In some embodiments, the needle-passing hole is an oblong hole or a rectangular hole, the needle-exiting hole and the needle body of the administration needle are in an interference fit, and the diameter of the lower through-hole and the width of the needle-passing hole are in a clearance fit with the needle body.

In some embodiments, the administration needle includes a needle body, the rear end of the needle body communicates with the liquid reservoir through the infusion tube, and the front end of the needle body sequentially passes through the upper needle exit hole, the needle passage hole, the lower through hole, the lower end needle exit hole, and pierces the needle. The skin is connected to the infusion port for drug administration, the upper end of the needle body is provided with an operation end, and the operation end is connected to the upper end of the connecting line.

In some embodiments, the operation end is made of plastic material, the middle of the operation end is entirely covered with the outer wall of the needle, and the outer end of the operation end forms two holding pieces.

Description of drawings

1 is a schematic diagram of a self-locking safety needle for an infusion port according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of a needle-pulling state of a self-locking safety needle for infusion port shown in Fig. 1;

3 is a schematic front view of the lock pin box shown in FIG. 1;

Fig. 4 is the A-A sectional schematic diagram of the lock pin box shown in Fig. 3;

Fig. 5 is the B-B sectional schematic diagram of the lock pin box shown in Fig. 3;

Fig. 6 is the C-C sectional schematic diagram of the lock pin box shown in Fig. 3;

Fig. 7 is the D-D sectional schematic diagram of the lock pin box shown in Fig. 3;

8 is a three-dimensional schematic diagram of the elastic seat shown in FIG. 1;

FIG. 9 is a schematic front view of the elastic seat shown in FIG. 8;

FIG. 10 is a schematic top view of the elastic seat shown in FIG. 8;

Fig. 11 is the bottom view schematic diagram of the elastic seat shown in Fig. 8;

Fig. 12 is a schematic front view of the administration needle shown in Fig. 1;

Figure 13 is a schematic top view of the drug delivery needle shown in Figure 12;

Medication needle 1, needle body 10, operating end 11, holding piece 12;

Locking needle box 2, box body 20, cavity 21, needle outlet hole 22, positioning block 23, thread path 24, upper thread hole 244, horizontal channel 242, longitudinal channel 241, lower thread hole 243, moving channel 25, limit plate 26, slide 27;

Elastic seat 3 , bottom plate 31 , elastic plate 32 , stop plate 33 , lower through hole 34 , pin hole 35 , ball 36 , connecting wire 4 .

Detailed ways

The present utility model will be described in further detail below in conjunction with the accompanying drawings. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "inner" and "outer" ” refer to directions towards or away from the geometric center of a particular part, respectively.

1 to 13 schematically show a self-locking safety needle for an infusion port according to an embodiment of the present invention. As shown in the figure, the device includes a drug administration needle 1, a locking needle box 2, an elastic seat 3 and a connecting wire 4,

The needle lock box 2 includes a box body 20, the lower surface of the box body 20 is close to the infusion port implanted under the skin, the inner part of the box body 20 is hollow to form a cavity 21, and the upper and lower surfaces of the box body 20 are respectively formed with needle holes 22 for the The needle tip of the medicine needle 1 passes through the needle outlet hole 22 at the lower end to communicate with the infusion port, one end of the upper cavity wall of the box body 20 vertically extends downward to form a positioning block 23, and the routing channel 24 is arranged on the other end of the upper cavity wall of the box body 20 and connected side chamber walls,

The elastic seat 3 includes a bottom plate 31 and an elastic plate 32. The lower end of the elastic plate 32 is connected to the upper end of the bottom plate 31 obliquely. The bottom plate 31 is provided with a lower through hole 34, and the elastic plate 32 is provided with a pin hole 35. The bottom plate 31 moves on the lower cavity wall of the cavity 21,

One end of the connecting wire 4 is connected to the drug administration needle 1, and the other end of the connecting wire 4 is connected to the base plate 31 through the wiring channel 24,

When the elastic plate 32 is compressed and adheres to the lower surface of the positioning block 23, the lower end of the medication needle 1 can pass through the upper needle outlet hole 22, the needle outlet hole 35, the lower through hole 34 and the lower needle outlet hole 22 in sequence to connect to the infusion port for administration. medicine, the connecting wire 4 is set loosely in the wiring path 24,

When the user fixes the needle lock box 2 with one hand and pulls up the drug administration needle 1 with the other hand, the connecting wire 4 is gradually tightened and straightened in the cable channel 24, and the connecting wire 4 pulls the bottom plate 31 to move to the other end, while the bottom plate 31 is sealed The lower end exits the needle hole 22 , the upper end of the elastic plate 32 is separated from the positioning block 23 and elastically spreads to fit against the lower cavity wall of the cavity 21 , and the medication needle 1 is always located in the cavity 21 .

The self-locking safety needle for an infusion port is connected by a medication needle 1 and an elastic seat 3. When the medication needle 1 is pulled out, the elastic seat 3 is displaced, and seals the needle outlet hole 22 at the lower end, and makes The needle tip of the dosing needle is enclosed in the cavity, and the dosing needle 1 does not slide out of the lock needle box when it is pulled out, so the dosing needle 1 is prevented from stabbing the medical staff or the accompanying staff, and the infection of microorganisms such as related viruses is prevented. At the same time, the device is easy to operate, which can reduce the experience and technical requirements of medical staff to operate dangerous instruments, greatly improve the speed and technology of needle extraction, and facilitate large-scale popularization and application. The length of the needle 1 is used to control the uppermost position of the drug delivery needle 1, with high control precision and no accidents; again, the elastic seat 3 has a positioning block 23 when it is in a compressed state, and when it is fully expanded, the upper end touches the upper cavity wall, and the two states are both In a fixed state, the upper and lower positions can be effectively controlled, thereby improving the safety and self-locking ability.

Preferably, the elastic seat 3 further includes a stop plate 33 , the stop plate 33 is vertically connected to the other end of the bottom plate 31 , and the stop plate 33 is located below the upper end of the elastic plate 32 . The beneficial effect is that the stop plate 33 can effectively control the position of the lowermost end of the elastic plate 32, thereby improving the position accuracy.

Preferably, the bottom plate 31 , the spring plate 32 and the stop plate 33 are integrated into a structure or the bottom plate 31 , the spring plate 32 and the stop plate 33 are connected by an adhesive.

Preferably, the elastic plate 32 is polyurethane elastic rubber. The beneficial effects are: the elastic plate 32 of the material is convenient to process, has good elastic properties, and does not affect the operation of the patient's nuclear magnetic resonance.

Preferably, the lower cavity wall of the box body 20 is further provided with a moving channel 25. The width of the moving channel 25 and the bottom plate 31 is the same. The plates 26 are respectively connected to the two side walls of the cavity 21 , and a through-length slideway 27 is formed in the middle of the limiting plate 26 . The beneficial effect is that the arrangement of the moving path 25 can effectively ensure the straightness of the movement of the elastic seat 3 and the movement precision, thereby improving the needle movement precision and controllability.

Preferably, balls 36 are mounted on the lower surface of the bottom plate 31 , and the balls 36 fit against the lower cavity wall of the box body 20 . The beneficial effects are as follows: the rolling friction of the ball 36 is relative to the sliding friction of the surface, the frictional resistance is small, the movement is flexible, and there is no jamming.

Preferably, the cable routing channel 24 includes a longitudinal channel 241 and a transverse channel 242 that communicate with each other. The longitudinal channel 241 is located in the side cavity wall of the box body 20, and the lower end of the longitudinal channel 241 extends toward the inner surface of the side cavity wall of the box body 20 to form a lower cable hole 243. The inner end of the transverse channel 242 extends to the upper surface of the upper cavity wall of the box body 20 to form an upper line hole 244 , and the connecting wire 4 passes through the upper line hole 244 , the transverse channel 242 , the longitudinal channel 241 and the lower line hole 243 to connect to the bottom plate 31 .

Preferably, the needle-passing hole 35 is an oblong hole or a rectangular hole, the needle-exiting hole 22 is an interference fit with the needle body 10 of the drug delivery needle 1, and the diameter of the lower through-hole 34 and the width of the needle-passing hole 35 are in clearance fit with the needle body 10 . The beneficial effects are: the setting can effectively ensure that the drug delivery needle 1 is tightly sealed during infusion, and is convenient to pull out, and the selection of the oblong hole or the rectangular hole through the needle hole 35 can effectively ensure the movement of the elastic seat 3 and the drug delivery needle. 1 moves up and down without interference.

Preferably, the drug delivery needle 1 includes a needle body 10, the rear end of the needle body 10 is communicated with the liquid reservoir through the infusion tube, and the front end of the needle body 10 passes through the upper needle outlet hole 22, the needle passage hole 35, the lower through hole 34, the lower end outlet hole in sequence. The needle hole 22 is inserted into the skin and connected to the infusion port for drug administration. The upper end of the needle body 10 is provided with an operation end 11 , and the operation end 11 is connected to the upper end of the connecting wire 4 .

Preferably, the operation end 11 is made of plastic material, the middle of the operation end 11 is entirely covered on the outer wall of the needle body 10, and the outer end of the operation end 11 is formed with two pinch pieces 12, and the pinch pieces 12 can be folded upward at a certain angle to facilitate pinching Keep pulling the needle upwards. The beneficial effects are: the setting is convenient to operate.

Preferably, the gripping sheet 12 can be a butterfly-shaped sheet.

Preferably, the gripping piece 12 can be turned upside down and folded halfway by 90°. At this time, the upward pulling force is a vertical force, and there is no horizontal component force, which can reduce the pulling force.

The holding piece 12 of the butterfly-shaped piece is turned up and half-folded by 90°, the operator fixes the box body 20 with one hand, and picks up the holding piece 12 of the upper butterfly-like piece with the other hand to pull out the needle.

The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention.

Claims (10)

1. A self-locking safety needle for an infusion port is characterized by comprising a medicine feeding needle (1), a needle locking box (2), an elastic seat (3) and a connecting wire (4),

the needle locking box (2) comprises a box body (20), the lower surface of the box body (20) is attached to the skin and is close to an infusion port implanted under the skin, a cavity (21) is formed in the box body (20) in a hollow mode, needle outlets (22) are formed in the upper surface and the lower surface of the box body (20) respectively, the needle point of the medicine feeding needle (1) penetrates through the needle outlet (22) at the lower end to be communicated with the infusion port, one end of the upper cavity wall of the box body (20) extends downwards and vertically to form a positioning block (23), and a route (24) is arranged at the other end of the upper cavity wall of the box body (20) and the side cavity walls connected with the positioning,

the elastic seat (3) comprises a bottom plate (31) and an elastic plate (32), the lower end of the elastic plate (32) is obliquely connected with one end of the bottom plate (31), the bottom plate (31) is provided with a lower through hole (34), the elastic plate (32) is provided with a needle hole (35), the elastic seat (3) is positioned in the cavity (21), the bottom plate (31) moves on the cavity wall under the cavity (21),

one end of the connecting wire (4) is connected with the medicine feeding needle (1), the other end of the connecting wire (4) penetrates through the wire path (24) to be connected with the bottom plate (31),

when the elastic plate (32) is compressed and attached to the lower surface of the positioning block (23), the lower end of the medicine feeding needle (1) can sequentially penetrate through the upper end needle outlet hole (22), the needle passing hole (35), the lower through hole (34) and the lower end needle outlet hole (22) to be connected with the transfusion port for medicine feeding, the connecting wire (4) is arranged in the wire walking channel (24) in a loosening manner,

when the user is fixed on one hand lock needle box (2), pull up on the other hand when giving medicine needle (1), connecting wire (4) are in it straightens to tighten gradually in lane (24) to walk, connecting wire (4) pulling bottom plate (31) remove to the other end, simultaneously bottom plate (31) seal the lower extreme go out pinhole (22), diving board (32) upper end breaks away from locating piece (23) and elasticity open the laminating cavity wall under cavity (21), give medicine needle (1) and be located always in cavity (21).

2. The self-locking safety needle for a port according to claim 1, wherein the elastic seat (3) further comprises a stop plate (33), the stop plate (33) is vertically connected to the other end of the bottom plate (31), and the stop plate (33) is positioned below the upper end of the elastic plate (32).

3. The self-locking safety needle for a port according to claim 2, wherein the base plate (31), the spring plate (32) and the stop plate (33) are an integral structure or the base plate (31), the spring plate (32) and the stop plate (33) are connected by an adhesive.

4. The self-locking safety needle for a port according to claim 3, wherein the spring plate (32) is polyurethane elastic rubber.

5. The self-locking safety needle for the transfusion harbor according to claim 1, wherein the lower cavity wall of the box body (20) is further provided with a moving channel (25), the width of the moving channel (25) is the same as that of the bottom plate (31), the moving channel (25) is communicated with the wire-moving channel (24), two limiting plates (26) are formed on the moving channel (25), the limiting plates (26) are respectively connected with two side walls of the cavity (21), a through long slide way (27) is formed in the middle of the limiting plates (26), and the slide way (27) is in clearance fit with the width of the elastic plate (32).

6. The self-locking safety needle for a port according to claim 5, wherein a ball (36) is mounted on the lower surface of the bottom plate (31), and the ball (36) is attached to the lower cavity wall of the box body (20).

7. The self-locking safety needle for a transfusion port as claimed in claim 5, wherein the routing channel (24) comprises a longitudinal channel (241) and a transverse channel (242) which are communicated with each other, the longitudinal channel (241) is located in the side cavity wall of the box body (20), the lower end of the longitudinal channel (241) extends towards the inner surface of the side cavity wall of the box body (20) to form a lower line hole (243), the inner end of the transverse channel (242) extends towards the upper surface of the upper cavity wall of the box body (20) to form an upper line hole (244), and the connecting line (4) passes through the upper line hole (244), the transverse channel (242), the longitudinal channel (241) and the lower line hole (243) to be connected with the bottom plate (31).

8. The self-locking safety needle for a transfusion port is characterized in that the needle passing hole (35) is an oblong hole or a rectangular hole, the needle outlet hole (22) is in interference fit with the needle body (10) of the medicine feeding needle (1), and the diameter of the lower through hole (34) and the width of the needle passing hole (35) are in clearance fit with the needle body (10).

9. The self-locking safety needle for the infusion port is characterized in that the medicine feeding needle (1) comprises a needle body (10), the rear end of the needle body (10) is communicated with a liquid storage device through a liquid conveying pipe, the front end of the needle body (10) sequentially penetrates through the upper needle outlet hole (22), the needle passing hole (35), the lower through hole (34) and the lower needle outlet hole (22) and penetrates into the skin to be connected with the infusion port to feed medicine, an operating end (11) is arranged at the upper end of the needle body (10), and the operating end (11) is connected with the upper end of the connecting line (4).

10. The self-locking safety needle for a transfusion port as claimed in claim 9, wherein the operation end (11) is made of plastic, the middle of the operation end (11) is integrally coated on the outer wall of the needle body (10), and two holding pieces (12) are formed at the outer end of the operation end (11).

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