Anti-needlestick devices, non-destructive needles and infusion devices

Abstract

The present invention relates to the technical field of medical articles, and in particular to an anti-needle puncture device, a non-destructive needle and an infusion device, comprising: an end cap structure, which is sleeved on a needle bent at a liquid outlet and detachably mounted on a fixing seat for fixing the needle; the end cap structure has a receiving cavity, and a needle hole connected to the receiving cavity is opened on the end cap structure; the end cap structure is suitable for sliding along the outer wall of the needle from one end close to the fixing seat to the other end away from the fixing seat, so that the needle tip passes through the needle hole and is limited in the receiving cavity; the radius of the needle hole is greater than or equal to the radius of the needle, and is less than the minimum distance between the end face of the liquid outlet and the axis of the needle; the radius of the receiving cavity is greater than the radius of the needle hole, and is greater than or equal to the maximum distance between the end face of the liquid outlet and the axis of the needle. The needle tip is stably fixed in the receiving cavity, and at the same time, the installation of the baffle and the return spring is reduced, which simplifies the setting of the end cap structure and reduces the overall cost.

Description

Technical Field

[0001] The present invention relates to the technical field of medical articles, and particularly relates to a needle-prick prevention device, a non-damaging needle and an infusion device. Background Art

[0002] A non-damaging needle is generally used in medical infusion and is used in cooperation with an implantable drug delivery device (such as an infusion port). The liquid medicine is input into the patient's body through the non-damaging needle and the implantable drug delivery device to treat the patient. After the non-damaging needle is used, since the needle tip is sharp and exposed, it is easy to prick medical staff or other people. In addition, the used non-damaging needle should be avoided from being reused, and special treatment needs to be carried out on the non-damaging needle.

[0003] A base and an end cap structure with an accommodating space, the needle is fixed on the base. Before use, the end cap structure is sleeved on the needle and detachably fixed on the base. After use, the end cap structure is slid along the outer wall of the needle to the needle tip so that the needle tip enters the accommodating space of the end cap structure. A baffle is arranged in the end cap structure. After the needle tip enters the accommodating space, the baffle blocks the through hole for the needle tip to pass through on the end cap structure under the push of a return spring, so that the needle tip cannot penetrate out of the through hole of the end cap structure again under the action of an external force, so as to achieve the effect of sealing the needle tip, avoiding pricking people and preventing secondary use.

[0004] However, the non-damaging needle is small in volume, so the corresponding end cap structure is small in volume. Arranging a baffle, a return spring and a limiting structure cooperating with the two in the limited volume of the end cap structure makes the overall structure of the end cap structure of the non-damaging needle complex, the manufacturing and assembly difficult, and the overall cost high. Summary of the Invention

[0005] Therefore, the present invention aims to solve the technical problems of the existing needle-prick prevention device with a complex structure and high manufacturing cost, and thus provides a needle-prick prevention device, including:

[0006] An end cap structure, sleeved on the needle bent at the liquid outlet and detachably installed on a fixing seat for fixing the needle;

[0007] The end cap structure has an accommodating cavity, and a needle hole communicating with the accommodating cavity is formed on the end cap structure; the end cap structure is adapted to slide along the outer wall of the needle from one end close to the fixing seat to the other end away from the fixing seat, so that the needle tip passes through the needle hole and is limited in the accommodating cavity;

[0008] The radius of the needle hole is greater than or equal to the radius of the needle and less than the minimum distance between the end face of the liquid outlet and the axis of the needle;

[0009] The radius of the accommodating cavity is greater than the radius of the needle hole and greater than or equal to the maximum distance between the end face of the liquid outlet and the axis of the needle.

[0010] Preferably, the wall surface of the accommodation cavity is adapted to abut against the end face of the liquid outlet.

[0011] Preferably, the end cap structure includes: a base on which the needle hole is formed; a limiting seat fixed on the base, and the accommodation cavity is formed on the limiting seat; a limiting channel communicating with the accommodation cavity is formed on the limiting seat facing away from the needle hole.

[0012] Preferably, the length of the limiting channel is greater than the length of the bent section at the liquid outlet.

[0013] Preferably, a clamping post is arranged on the base, and the limiting seat is in interference fit with the clamping post.

[0014] Preferably, one of the inner wall surface of the clamping post and the outer wall surface of the limiting seat is provided with a clamping protrusion, and the other is provided with a clamping groove, and the clamping protrusion is clamped in the clamping groove.

[0015] Preferably, a guiding block is arranged on the base and is adapted to be embedded in the clamping groove of the fixed seat.

[0016] Preferably, the inner wall surface of the needle hole and the wall surface of the accommodation cavity are in contact or partially overlapped in the orthographic projection on any plane where the axis of the needle hole is located.

[0017] The present invention also provides a non-invasive needle, including the above anti-needle-pricking device.

[0018] The present invention also provides an infusion device, including the above non-invasive needle, a hose communicated with the needle; and a locking joint communicated with the hose.

[0019] Preferably, it further includes: a stop valve arranged on the hose; a catheter seat sleeved on one end of the hose and communicating the locking joint and the hose.

[0020] The technical solution of the present invention has the following advantages:

[0021] 1. For the anti-needle-pricking device provided by the present invention, the end cap structure is separated from the fixed seat, and then slides on the needle to make the needle tip enter the accommodation cavity. Since the radius of the needle hole is smaller than the minimum distance between the end face of the liquid outlet and the axis of the needle, and the radius of the accommodation cavity is greater than or equal to the maximum distance between the end face of the liquid outlet and the axis of the needle, the needle tip is stably fixed in the accommodation cavity. At the same time, due to the reduction of the installation of the baffle and the return spring, the setting of the end cap structure is simplified, and the overall cost is reduced. Description of the Drawings

[0022] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of the infusion device according to Embodiment 3 of the present invention;

[0024] Figure 2 It is a cross-sectional view of the end cap structure fixed on the fixed seat in the needle protection device according to Embodiment 1 of the present invention;

[0025] Figure 3 It is a cross-sectional view of the needle tip limited in the accommodation cavity in the needle protection device according to Embodiment 1 of the present invention;

[0026] Figure 4 It is a schematic structural diagram of the end cap structure in the needle protection device according to Embodiment 1 of the present invention;

[0027] Figure 5 It is a schematic structural diagram of the atraumatic needle according to Embodiment 2 of the present invention;

[0028] Figure 6 It is another schematic structural diagram of the atraumatic needle according to Embodiment 2 of the present invention;

[0029] Figure 7 For Figure 1 It is a cross-sectional view of the catheter seat, the locking joint and the rubber pad in Specific Embodiments

[0030] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] Embodiment 1

[0035] This embodiment provides a needle-prick prevention device, as Figures 2 - 4 shown, including an end cap structure having a receiving cavity 3011. The end cap structure is sleeved on the needle 40 bent at the liquid outlet, and is detachably installed on the fixing base 10 for fixing the needle 40. A needle hole 203 communicating with the receiving cavity 3011 is formed on the end cap structure. The end cap structure can slide along the outer wall of the needle 40 from one end close to the fixing base 10 to the other end away from the fixing base 10, so that the tip of the needle passes through the needle hole 203 and is limited in the receiving cavity 3011. Figure 2 The end cap structure shown is fixed on the fixing base 10, Figure 3 The end cap structure shown is released from the restriction of the fixing base 10, so as to limit the tip of the needle 40 in the receiving cavity 3011.

[0036] The needle 40 includes a straight tube section 401 and a bent section 402. There is a bent portion between the bent section 402 and the straight tube section 401. The existence of the bent portion enables the cut of the bent section 402 to maintain a vertical state, so as to facilitate the connection between the bent section 402 (the tip of the needle) and an implantable drug delivery device (such as an infusion port). In some embodiments, the cut of the bent portion 402 may not be in a vertical state either.

[0037] To facilitate the smooth sliding of the needle 40 on the end cap structure, the radius of the needle hole 203 is greater than or equal to the radius of the needle 40, the radius of the receiving cavity 3011 is greater than the radius of the needle hole 203, the radius of the needle hole 203 is less than the minimum distance between the end face of the liquid outlet (the cut of the bent section 402) and the axis of the needle 40, and the radius of the receiving cavity 3011 is greater than or equal to the maximum distance between the end face of the liquid outlet (the cut of the bent section 402) and the axis of the needle 40. Wherein, the axis of the needle 40 refers to the axis of the straight tube section 401.

[0038] When the incision of the bending section 402 is in a vertical state, the maximum distance and the minimum distance between the end face of the liquid outlet and the axis of the needle 40 are equal, and the end face of the liquid outlet can abut against the wall surface of the accommodation cavity 3011, thereby restricting the swing of the needle 40 in one direction, so that the tip of the needle 40 can be stably restricted within the accommodation cavity 3011.

[0039] In the above embodiment, the end cap structure is separated from the fixed seat 10, and then slides on the needle 40 so that the tip enters the accommodation cavity 3011. Since the radius of the needle hole 203 is smaller than the minimum distance between the end face of the liquid outlet and the axis of the needle 40, and the radius of the accommodation cavity 3011 is greater than or equal to the maximum distance between the end face of the liquid outlet and the axis of the needle 40, the tip of the needle is stably fixed in the accommodation cavity. At the same time, due to the reduction of the installation of the baffle and the return spring, the setting of the end cap structure is simplified, and the overall cost is reduced.

[0040] In some embodiments, the radius of the accommodation cavity 3011 is less than or equal to the maximum distance between the end face of the liquid outlet (the incision of the bending section 402) and the axis of the needle 40. At this time, the tip of the needle 40 abuts against the wall surface of the accommodation cavity, which can limit the needle 40 and prevent the needle 40 from swinging out of the accommodation cavity 3011.

[0041] As Figures 2 - 4 shown, the end cap structure includes a base 20 and a limit seat 30. The needle hole 203 is opened on the base 20, and the accommodation cavity 3011 is opened on the limit seat 30. The limit seat 30 is fixed on the base 20. A limit channel 3012 communicating with the accommodation cavity 3011 is opened on the limit seat 30 facing away from the needle hole 203. The limit channel 3012 and the accommodation cavity 3011 form a limit area 301 to jointly limit the tip of the needle.

[0042] The radius of the limit channel 3012 is slightly larger than or equal to the radius of the straight tube section 401, and the limit channel 3012, the accommodation cavity 3011 and the needle hole 203 are coaxial. The length of the limit channel 3012 is greater than the length of the bending section at the liquid outlet, that is, the length of the limit channel 3012 is greater than the length of the bending section 402, thereby preventing the needle 40 from easily coming out of the accommodation cavity 3011.

[0043] As Figure 4 shown, a transition channel 3013 is provided between the limit channel 3012 and the accommodation cavity 3011. The radius of the transition channel 3013 gradually decreases from the accommodation cavity 3011 to the limit channel 3012. For example, the cross-section of the transition channel 3013 can be an isosceles trapezoid. The setting of the transition channel 3013 can enable the needle 40 to be smoothly inserted into the limit seat 30.

[0044] The base 20 is provided with a clamping column 204, which has an inner cavity and is connected to the pinhole 203. The limit seat 30 is interference fit with the clamping column 204, so that the limit seat 30 is detachably set on the base 20. In this embodiment, the inner wall surface of the clamping column 204 is provided with a clamping groove, and the outer wall surface of the limit seat 30 is provided with a clamping protrusion 302. When the limit seat 30 cooperates with the clamping column 204, the clamping protrusion 302 is clamped in the clamping groove. In some embodiments, the inner wall surface of the clamping column 204 is provided with a clamping protrusion, and the outer wall surface of the limit seat 30 is provided with a clamping groove. Alternatively, the limit seat 30 can also be fixed to the base 20 by means of pins, threaded fitting, etc.

[0045] The base 20 is provided with a guide block 202, and the fixed seat 10 is provided with a slot 107 at a position corresponding to the guide block, and the guide block 202 is embedded and fixed in the slot 107. The guide block 202 can not only provide a fixing function for the end cover structure, but also provide a clear installation orientation during installation.

[0046] The inner wall surface of the pinhole 203 and the wall surface of the accommodating cavity 3011 are connected or partially overlapped with each other in the orthographic projection on any plane where the axis of the pinhole is located. Figures 2 - 4 As shown in FIG. 1 , the inner wall surface of the pinhole 203 in this embodiment is connected to the orthographic projection of the wall surface of the accommodating cavity 3011 on any plane where the axis of the pinhole is located. When the inner wall surface of the pinhole 203 and the orthographic projection of the wall surface of the accommodating cavity 3011 on any plane where the axis of the pinhole is located partially overlap, the needle tip will be limited between the overlapping parts when it is located in the accommodating cavity 3011, making it more difficult for the needle 40 to escape from the accommodating cavity 3011.

[0047] Example 2

[0048] This embodiment provides a non-damaging needle, including the needle stick prevention device provided in Example 1.

[0049] Among them, such as Figure 2 and Figure 3 As shown in FIG. 1 , a receiving station 102 is provided at one end of the fixing seat 10, and the end cover structure is located in the receiving station 102. A first flow channel 104 and a second flow channel 105 are provided in the fixing seat 10, and the first flow channel 104 is connected with the second flow channel 105 and the receiving station 102, and the needle 40 is fixed in the first flow channel 104 and is connected with the first flow channel 104.

[0050] A transition channel 106 is also provided between the accommodation station 102 and the first channel 104. The transition channel 106 is conical and the provision of the transition channel 106 facilitates the installation of the needle 40. A step surface 103 is provided between the accommodation station 102 and the transition channel 106. When the end cover structure is fixed on the fixing seat 10, the limiting seat 30 can abut against the step surface 103.

[0051] ​​​​​​Figure 5 and Figure 6 As shown in Figure 6 , at least two buckles 201 are provided on the base 20. The at least two buckles 201 are oppositely arranged. The buckles 201 on the base 20 are clamped with the fixing base 10, so that the base 20 is detachably fixed on the fixing base 10, and can be accurately and quickly fixed in cooperation with the guiding block 202. Anti-slip protrusions 101 are provided on the outer wall surface of the fixing base 10, which is convenient for the operator to use.

[0052] Embodiment 3

[0053] This embodiment provides an infusion device, as Figure 1 and Figure 2 shown, including the non-invasive needle provided in Embodiment 2, and further including a hose 50 and a locking joint 503. The hose 50 is fixed on the second flow channel 105, and the hose 50 communicates with the second flow channel 105 and then communicates with the needle 40. The locking joint 503 is provided at one end of the hose 50 and communicates with the hose 50. The locking joint 503 is used for fixedly connecting with a medicine bottle (not shown), so that the medicine can flow smoothly into the target body.

[0054] As Figure 7 shown, it further includes a hemostatic valve 501 and a catheter seat 502. The hemostatic valve 501 is provided on the hose 50, and the hemostatic valve 501 is used to disconnect or connect the flow of the hose. The catheter seat 502 is provided at one end of the hose opposite to the second flow channel 105. The catheter seat 502 communicates with the locking joint 503, and a foot pad 504 is further provided in the locking joint 503.

[0055] Obviously, the above embodiments are merely examples given for clear illustration, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom still fall within the protection scope of the present invention.

Claims

1. A needlestick protection device, comprising: An end cap structure, which is sleeved on the needle (40) bent at the liquid outlet and is detachably mounted on a fixing seat (10) for fixing the needle (40); The end cap structure has a receiving cavity (3011), and a needle hole (203) is provided on the end cap structure and is connected to the receiving cavity; the end cap structure is suitable for sliding along the outer wall of the needle (40) from one end close to the fixing seat (10) to the other end away from the fixing seat (10), so that the needle tip passes through the needle hole (203) and is limited in the receiving cavity; characterized in that: The radius of the needle hole (203) is greater than or equal to the radius of the needle (40), and is smaller than the minimum distance between the end surface of the liquid outlet and the axis of the needle (40); The radius of the accommodating cavity (3011) is greater than the radius of the needle hole (203), and is greater than or equal to the maximum distance between the end surface of the liquid outlet and the axis of the needle (40); When the needle tip passes through the needle hole (203) and is positioned within the accommodating cavity, the wall surface of the accommodating cavity (3011) is suitable for abutting against the end surface of the liquid outlet.

2. The needle stick protection device according to claim 1, characterized in that: The end cap structure comprises: A base (20) having the pinhole (203) formed thereon; The limiting seat (30) is fixed on the base (20), and the accommodating cavity (3011) is provided on the limiting seat (30); and a limiting channel (3012) communicating with the accommodating cavity (3011) is provided on the limiting seat (30) facing away from the needle hole (203).

3. The needle stick protection device according to claim 2, characterized in that: The length of the limiting channel (3012) is greater than the length of the bending section located at the liquid outlet.

4. The needle stick protection device according to claim 2, characterized in that: A clamping column (204) is provided on the base (20), and the limiting seat (30) is interference-fitted with the clamping column (204).

5. The needle stick protection device according to claim 4, characterized in that: One of the inner wall surface of the clamping column (204) and the outer wall surface of the limiting seat (30) is provided with a clamping protrusion (302), and the other is provided with a clamping groove, and the clamping protrusion (302) is clamped in the clamping groove.

6. The needle stick protection device according to claim 2, characterized in that: The base (20) is provided with a guide block (202) suitable for being embedded in the slot (107) of the fixing seat (10).

7. The needle stick protection device according to any one of claims 1 to 6, characterized in that: The inner wall surface of the pinhole (203) and the wall surface of the accommodating cavity (3011) are connected or partially overlapped in orthographic projection on any plane where the axis of the pinhole is located.

8. A non-damaging needle, characterized in that: The invention comprises the anti-needlestick device according to any one of claims 1 to 7.

9. An infusion device, characterized in that: comprising the non-damaging needle according to claim 8, A hose (50) connected to the needle (40); A locking connector (503) connected to the hose (50); A stop valve (501) is arranged on the hose (50); The catheter seat (502) is sleeved on one end of the hose (50) and is in communication with the locking connector (503) and the hose (50).

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