Safe needle specially for implantable drug delivery device

Abstract

A safe needle specially for an implantable drug delivery device. The safe needle comprises a needle handle (2) and a needle tube (1) arranged on the needle handle (2), wherein a safety mechanism (3) is arranged on the needle handle (2); the safety mechanism (3) comprises a panel (8), a spring piece (9) and a bottom cover (10), the bottom cover (10) is connected to the panel (8) to form a supporting member, and a hollow part (10a) is formed inside the bottom cover (10); a first through hole (101) is formed in the bottom surface of the bottom cover (10), a second through hole (81) is formed in the panel (8), a needle tip of the needle tube (1) passes through the first through hole (101) and the second through hole (81), and a protruding part (1a) for restricting the needle tip from being separated from the first through hole (101) is arranged at the position of the needle tube (1) close to the needle tip; the spring piece (9) comprises a fixing part (91), a connecting part (93) and a blocking part (92) which are connected in sequence, the fixing part (91) is fixed at the bottom of the bottom cover (10), and the blocking part (92) abuts against the needle tube (1); and when the needle tip of the needle tube (1) is pulled into the hollow part (10a) and is located below the blocking part (92), the spring piece (9) deforms such that the blocking part (92) forms blocking on the needle tube (1) above the needle tube (1). The safe needle specially for the implantable drug delivery device can prevent medical staff from being stabbed after the needle is withdrawn.

Description

A special needle for a safe implantable drug delivery device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 11, 2023, with application number 2023116930476 and invention name “A special needle for a safe implantable drug delivery device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the technical field of medical devices, and in particular to a special needle for a safe implantable drug delivery device. Background Art

[0003] The dedicated needle for implantable drug delivery device is a common medical device. After the existing dedicated needle for implantable drug delivery device is removed, the needle tip of the needle tube is exposed and can easily injure medical staff.

[0004] Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a safe implantable drug delivery device dedicated needle to solve the above technical problems.

[0006] The technical solutions of the present invention are as follows:

[0007] A special needle for a safe implantable drug delivery device comprises a needle handle, a needle tube arranged on the needle handle, and a safety mechanism is provided on the needle handle; the safety mechanism comprises a panel, a spring sheet and a bottom cover, the bottom cover is connected to the panel to form a support member, and a hollow portion is formed inside the bottom cover; a first through hole is provided on the bottom surface of the bottom cover, a second through hole is provided on the panel, the needle tip of the needle tube passes through the first through hole and the second through hole, and a protrusion is provided on the needle tube near the needle tip to limit the needle tip of the needle tube from escaping from the first through hole; the spring sheet comprises a fixing portion, a connecting portion and a blocking portion connected in sequence, the fixing portion is fixed to the bottom of the bottom cover, and the blocking portion is against the needle tube; when the needle tip of the needle tube is pulled into the hollow portion and is located below the blocking portion, the spring sheet is deformed so that the blocking portion forms a barrier to the needle tube above the needle tube.

[0008] Preferably, the support member is detachably connected to the needle handle.

[0009] Preferably, the fixing portion is a bottom plane, a limiting hole is provided on the bottom plane, the diameter of the limiting hole is greater than or equal to the diameter of the part of the needle tube located below the protruding portion and is smaller than the diameter of the protruding portion; the first through hole, the second through hole and the third through hole are coaxially arranged, and a protruding piece is provided on one side of the fixing portion; the connecting portion is arranged on the side of the fixing portion close to the protruding piece; the connecting portion includes a bottom section connected to the fixing portion, a top section connected to the blocking portion and a V-shaped bend, the opening of the V-shaped bend faces the needle tube, one end is connected to the bottom section, and the other end is connected to the top section. In a natural state, the bottom section is vertical, the top section is inclined, and the top section is located on the side of the bottom section facing away from the protruding piece; the blocking portion is horizontal in a natural state; a mounting groove is provided on the bottom surface of the bottom cover above the first through hole, and the bottom surface of the mounting groove is provided with card grooves at both sides, and the protruding piece and the other side of the fixing portion are clamped in the corresponding card grooves.

[0010] Preferably, the end of the blocking portion not connected to the top section is provided with a downward bend.

[0011] Preferably, baffles are provided on both sides of the second through hole on the bottom surface of the panel, and the baffles are engaged with the bottom cover.

[0012] Preferably, one or more locking hooks are provided on the baffle, and a concave buckle groove matching the locking hook is provided on the bottom cover, and the locking hook is clamped in the concave buckle groove.

[0013] Preferably, a strip-shaped protrusion is provided on the inner wall of the bottom cover at a position corresponding to the blocking portion.

[0014] Preferably, the bottom surface of the panel is provided with square holes on both sides of the baffle, and the top surface of the bottom cover is inserted into the square holes at positions corresponding to the square grooves.

[0015] Preferably, a fixing pin is provided on the needle handle, and a fixing buckle that matches the fixing pin is provided on the bottom surface of the panel.

[0016] Preferably, a hose connected to the needle tube is installed on the needle handle, a liquid stop clamp is provided on the hose, a connecting seat is installed on the end of the hose not connected to the needle handle, and a sealing cap is installed on the connecting seat; a needle tip protective cover is provided on the needle tube.

[0017] When using the special needle for the safety implantable drug delivery device of the present invention, the needle tip protective cover is removed, and the needle handle is held to pierce the needle tip through the silicone diaphragm of the implantable drug delivery device for infusion. When the infusion is completed, the panel is gently supported to withdraw the needle tip from the human drug delivery device, and the needle tip retreats and falls into the hollow part of the safety mechanism, and finally escapes from the blocking part and is located below the blocking part. When the needle tip escapes from the blocking part, the blocking piece returns to its original state under the action of the elastic restoring force, so that the blocking part blocks the needle tip from above, and the needle tip cannot bypass the blocking part and expose through the second through hole; during the process of the needle tip retreating, due to the restriction of the protrusion, the needle tube cannot exit the first through hole. In this way, the needle tip is confined in the hollow part and cannot be exposed again, effectively preventing medical personnel from being stabbed after the needle is removed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a schematic diagram of the structure of a special needle for a safe implantable drug delivery device proposed by the present invention; wherein, the figure shows the state of the device when it is not in use;

[0019] FIG2 is a schematic diagram of the structure of a special needle for a safety implantable drug delivery device proposed by the present invention; wherein, the figure shows the state when the needle tip is safely locked in the hollow portion after use;

[0020] Figure 3 is a schematic structural diagram of a safety mechanism;

[0021] Figure 4 is a schematic structural diagram of a spring sheet;

[0022] FIG5 is a bottom view of FIG4;

[0023] Figure 6 is a schematic structural diagram of the bottom cover;

[0024] FIG7 is an enlarged view of point A in FIG6;

[0025] FIG8 is a schematic structural diagram of a panel;

[0026] FIG9 is a bottom view of FIG8;

[0027] In the figure: needle tube 1, needle handle 2, safety mechanism 3, hose 4, liquid stop clamp 5, connecting seat 6, sealing cap 7, panel 8, spring sheet 9, bottom cover 10, needle tip protection cover 11;

[0028] Protrusion 1a, fixing pin 21;

[0029] Second through hole 81, baffle 82, lock hook 83, square hole 84, fixing buckle 85;

[0030] Fixing portion 91, blocking portion 92, connecting portion 93, limiting hole 94, protruding piece 95, bottom section 93a, top section 93b, V-shaped bend 93c;

[0031] The first through hole 101, the recessed buckle groove 102, the strip-shaped protrusion 103, the locking groove 104, the mounting groove 105, and the hollow portion 10a. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] Embodiment, referring to Figures 1 to 4, this embodiment is a special needle for a safe implantable drug delivery device, comprising a needle handle 2, a needle tube 1 arranged on the needle handle, a hose 4 connected to the needle tube installed on the needle handle, a liquid stop clamp 5 provided on the hose, a connecting seat 6 installed on the end of the hose not connected to the needle handle, and a sealing cap 7 installed on the connecting seat. Among them, the needle handle, needle tube liquid stop clamp 5, connecting seat 6 and sealing cap 7 can use existing structures. The general needle tube is also provided with a needle tip protection sleeve 11, which is well known to those skilled in the art; in this application, the applicant mainly designed a safety mechanism 3, which is arranged on the needle handle to prevent the needle tube from being exposed and easily injuring medical personnel after the needle is removed; the above-mentioned safety mechanism includes a panel 8, a spring sheet 9 and a bottom cover 10, the bottom cover is connected to the panel to form a support member, and a hollow portion 10a is formed inside the bottom cover; a first through hole 101 is provided on the bottom surface of the bottom cover, and a second through hole 81 is provided on the panel, the needle tip of the needle tube passes through the first through hole and the second through hole, and a protrusion 1a is provided on the needle tube near the needle tip for limiting the needle tip of the needle tube from escaping from the first through hole; the spring sheet includes a fixing portion 91, a connecting portion 93 and a blocking portion 92 connected in sequence, the fixing portion is fixed to the bottom of the bottom cover, and the blocking portion is against the needle tube.

[0034] When using the above-mentioned special needle for the safety implantable drug delivery device, the needle tip protective cover is removed, and the needle handle is held to pierce the needle tip through the silicone diaphragm of the implantable drug delivery device for infusion. When the infusion is completed, the panel is gently supported to withdraw the needle tip from the human drug delivery device, and the needle tip retreats and falls into the hollow part of the safety mechanism, and finally breaks away from the blocking part and is located below the blocking part. When the needle tip breaks away from the blocking part, the blocking piece returns to its original state under the action of the elastic restoring force, so that the blocking part blocks the needle tip from above, and the needle tip cannot bypass the blocking part and expose through the second through hole; during the process of the needle tip retreating, due to the restriction of the protrusion, the needle tube cannot exit the first through hole. In this way, the needle tip is confined in the hollow part and cannot be exposed again, effectively preventing medical personnel from being stabbed after the needle is removed, and having better safety.

[0035] In actual production, the diameter of the first through hole can be set slightly smaller than that of the raised portion to cooperate with the raised portion to limit the retreat of the needle tip, or a separate limiting structure can be set. In this embodiment, the applicant has made the following design, referring to Figures 4 to 6. The fixing portion is a bottom plane, and a limiting hole 94 is provided on the bottom plane. The diameter of the limiting hole is slightly larger than or equal to the diameter of the portion of the needle tube located below the raised portion and smaller than the diameter of the raised portion. In this way, when installed, the fixing portion is clamped on the bottom surface of the bottom cover, so that the first through hole, the second through hole and the third through hole are coaxial, so that when the raised portion is aligned with the limiting hole, it is restricted to prevent the needle tip from continuing to retreat. In order to facilitate the fixing of the bottom plane, a protruding piece 95 is provided on one side of the fixing portion, and a mounting groove 105 is provided on the bottom surface of the bottom cover above the first through hole, so that the bottom plane passes through the mounting groove to reach the following clamping slot position during installation. The bottom surface of the mounting groove is provided with clamping grooves 104 on both sides, and the protruding piece and the other side of the fixing portion are clamped in the corresponding clamping grooves.

[0036] As a preferred embodiment, referring to FIG4 , the connecting portion is provided on a side of the fixing portion close to the protruding piece, and the connecting portion includes a bottom section 93a connected to the fixing portion, a top section 93b connected to the blocking portion, and a V-shaped bend 93c. The opening of the V-shaped bend faces the needle tube, one end is connected to the bottom section, and the other end is connected to the top section. In a natural state (that is, in a state without external interference), the bottom section is vertical, the top section is inclined, and the top section is located on the side of the bottom section facing away from the protruding piece; the blocking portion is horizontal in a natural state, so that when the needle tube is installed, the blocking portion is pulled to make it have There is a pre-tightening force against the needle tube, and the spring sheet is deformed to form the state of Figure 1. When the needle tube breaks away from the blocking portion, the spring sheet returns to its original shape, so that the blocking portion can block the needle tip from above to prevent it from being pushed out of the hollow portion; in this embodiment, the end of the blocking portion that is not connected to the top section is provided with a downward bend to prevent the needle tip from sliding to the right and breaking away from the restraint of the blocking portion; referring to Figure 7, in order to prevent the position of the blocking portion from being broken away, a strip protrusion 103 is provided on the inner wall of the bottom cover corresponding to the position of the blocking portion, so that the right end of the blocking portion is pressed against the strip protrusion when it recovers its deformation, so that the blocking portion and the strip protrusion overlap with each other, and after the needle tip is restricted, the needle tip is better prevented from being pushed forward.

[0037] As an embodiment, referring to Figures 7 to 9, baffles 82 are provided on both sides of the second through hole on the bottom surface of the panel, and the baffles are engaged with the bottom cover. One or more lock hooks 83 are provided on the baffle, and a recessed buckle groove 102 matching the lock hook is provided on the bottom cover, and the lock hook is locked in the recessed buckle groove.

[0038] In one embodiment, referring to Figures 3, 6, 8 and 9, the bottom surface of the panel is provided with square holes 84 on both sides of the baffle, and the top surface of the bottom cover is inserted into the square holes at positions corresponding to the square grooves, so that the connection between the bottom cover and the panel is more firmly established.

[0039] In actual production, the support member and the needle handle can be configured to be detachably connected. This allows the support member and the needle handle to be connected together before the needle tip pierces the implantable drug delivery device, facilitating operation. The support member and the needle handle can be separated after the infusion is completed. In this embodiment, referring to Figures 2 and 9 , a fixing pin 21 is provided on the needle handle, and a fixing buckle 85 is provided on the bottom surface of the panel to cooperate with the fixing pin. The fixing pin and the fixing buckle cooperate to achieve a detachable connection between the panel and the needle handle.

[0040] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A special needle for a safe implantable drug delivery device, comprising a needle handle (2), a needle tube (1) arranged on the needle handle, characterized in that: The needle handle is provided with a safety mechanism (3); The safety mechanism comprises a panel (8), a spring sheet (9) and a bottom cover (10), wherein the bottom cover is connected to the panel to form a support member, and a hollow portion (10a) is formed inside the bottom cover; A first through hole (101) is provided on the bottom surface of the bottom cover, a second through hole (81) is provided on the panel, the needle tip of the needle tube passes through the first through hole and the second through hole, and a protrusion (1a) is provided near the needle tip on the needle tube for limiting the needle tip of the needle tube from escaping from the first through hole; The spring sheet comprises a fixing portion (91), a connecting portion (93) and a blocking portion (92) which are connected in sequence, the fixing portion is fixed to the bottom of the bottom cover, and the blocking portion abuts against the needle tube; When the needle tip of the needle tube is pulled into the hollow portion and is located below the blocking portion, the spring sheet is deformed so that the blocking portion forms a blockage for the needle tube above the needle tube.

2. The special needle for a safe implantable drug delivery device according to claim 1, characterized in that: The support member is detachably connected to the needle handle.

3. A special needle for a safe implantable drug delivery device according to claim 1 or 2, characterized in that: The fixing portion is a bottom plane, and a limiting hole (94) is arranged on the bottom plane, and the diameter of the limiting hole is greater than or equal to the diameter of the portion of the needle tube located below the raised portion and smaller than the diameter of the raised portion; the first through hole, the second through hole and the third through hole are coaxially arranged, and a protruding piece (95) is arranged on one side of the fixing portion; The connecting portion is arranged on a side of the fixing portion close to the protruding piece; the connecting portion comprises a bottom section (93a) connected to the fixing portion, a top section (93b) connected to the blocking portion, and a V-shaped bend (93c); the opening of the V-shaped bend faces the needle tube, one end is connected to the bottom section, and the other end is connected to the top section; in a natural state, the bottom section is vertical, the top section is inclined, and the top section is located on the side of the bottom section that is away from the protruding piece; The blocking portion is horizontal in a natural state; A mounting groove (105) is provided on the bottom surface of the bottom cover above the first through hole, and clamping grooves (104) are provided on both sides of the bottom surface of the mounting groove, and the protruding piece and the other side of the fixing portion are clamped in the corresponding clamping grooves.

4. A safe implantable drug delivery device dedicated needle according to claim 3, characterized in that: One end of the blocking portion that is not connected to the top section is provided with a downward bend.

5. The special needle for a safe implantable drug delivery device according to claim 3, characterized in that: The bottom surface of the panel is provided with baffles (82) on both sides of the second through hole, and the baffles are clamped with the bottom cover.

6. A safe implantable drug delivery device dedicated needle according to claim 5, characterized in that: One or more locking hooks (83) are arranged on the baffle, and a concave buckle groove (102) matching the locking hook is arranged on the bottom cover, and the locking hook is clamped in the concave buckle groove.

7. The special needle for a safe implantable drug delivery device according to claim 3, characterized in that: A strip-shaped protrusion (103) is arranged on the inner wall of the bottom cover at a position corresponding to the blocking portion.

8. The special needle for a safe implantable drug delivery device according to claim 3, characterized in that: The bottom surface of the panel is provided with square holes (84) on both sides of the baffle, and the top surface of the bottom cover is inserted into the square holes at positions corresponding to the square grooves.

9. The special needle for a safe implantable drug delivery device according to claim 2, characterized in that: The needle handle is provided with a fixing pin (21), and the bottom surface of the panel is provided with a fixing buckle (85) matched with the fixing pin.

10. The special needle for a safe implantable drug delivery device according to claim 1, characterized in that: A hose (4) connected to the needle tube is installed on the needle handle, a liquid stop clamp (5) is provided on the hose, a connecting seat (6) is installed on the end of the hose not connected to the needle handle, and a sealing cap (7) is installed on the connecting seat; The needle tube is covered with a needle tip protection cover (11).

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