A stab-proof injection needle sheath structure

Abstract

The invention discloses a stab-proof injection needle sheath structure, comprising a needle seat and a needle body, a sheath structure connected to the needle seat, the sheath structure comprising a base, an outer coat, and an inner core, the base being connected to the needle seat, and the outer coat being connected to the base through a hinge structure; the outer coat and the inner core are respectively provided with a needle body through groove and an inner needle body through groove, a positioning rotating hole is provided at the end of the outer coat, a closed positioning groove, an enabled positioning groove, and a protective positioning groove are respectively provided on the inner side of the positioning rotating hole, the inner core is inserted into the positioning rotating hole and extends out of the outer coat, an elastic positioning claw is provided at the end of the inner core, and the inner core rotates in the outer coat to enable the elastic positioning claw to realize positioning buckles with the closed positioning groove, the enabled positioning groove, and the protective positioning groove, respectively, and the closed positioning groove and the enabled positioning groove are respectively provided with a rotating sliding surface on one side thereof. The invention effectively avoids stab injuries to medical staff and other personnel after use, and effectively avoids secondary use, thereby improving the safety of use.

Description

Technical Field

[0001] The invention relates to the technical field of syringes, and in particular to a stab-proof injection needle sheath structure. Background Art

[0002] The injection needle is a common medical device. Medical staff use syringes to connect the injection needles for use in the treatment of patients. Generally, a needle cap is provided on the injection needle. When not in use, the needle body is in the sheath and will not cause stab wounds to medical staff. However, after the injection needle is used, due to the heavy workload and work intensity of medical staff, the sheath is often not put on the needle again. This can easily cause the exposed sharp needle to cause stab wounds to medical staff. Moreover, during the centralized collection and recycling process, the exposed needles will inevitably cause stab wounds to the staff. Most of the injection needles and needles after use have residual liquid medicine and the bacteria used for injection. No matter what the situation is, the stab wound is likely to cause the risk of bacterial infection. Summary of the invention

[0003] The purpose of the present invention is to solve the problems raised in the above background technology and provide an anti-stab injection needle sheath structure.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is as follows: an anti-stab injection needle sheath structure, comprising a needle seat and a needle body, the needle seat is connected to a sheath structure that can cover the needle body, the sheath structure comprises a base, an outer sleeve, and an inner core, the base is connected to the needle seat, the inner core is arranged in the outer sleeve and can rotate, the outer sleeve is connected to the base through a hinge structure, and can drive the inner core to rotate relative to the needle body; the outer sleeve and the inner core are respectively provided with an outer needle body through groove and an inner needle body through groove that can realize corresponding, and the end of the outer sleeve is provided with a positioning rotation hole A closed positioning groove, an enabled positioning groove and a protective positioning groove are respectively arranged on the inner side of the positioning rotating hole. The inner core is inserted into the positioning rotating hole and extends out of the outer sleeve. An elastic positioning claw is arranged at the end of the inner core corresponding to the position of the inner needle body through groove. The inner core rotates in the outer sleeve to enable the elastic positioning claw to respectively realize positioning buckle with the closed positioning groove, the enabled positioning groove and the protective positioning groove. The closed positioning groove and the enabled positioning groove are respectively provided with a rotating sliding surface on one side surface thereof. When the elastic positioning claw and the enabled positioning groove are positioned and buckled, the outer needle body through groove corresponds to the inner needle body through groove.

[0005] The hinged structure is a folding plate connected to the outer shell, one end of the folding plate is connected to the outer shell as an integral structure, and the other end is connected to the base.

[0006] The base is provided with a buckle connection groove, and the folding plate is provided with a buckle boss with an integral structure and clamped in the buckle connection groove.

[0007] One end of the inner core is provided with a positioning step which abuts against the side surface of the positioning rotating hole, and the other end is correspondingly sleeved outside the end of the needle seat.

[0008] A side surface of the elastic positioning claw is provided with an auxiliary rotating sliding surface corresponding to the rotating sliding surface.

[0009] The closed positioning groove, the enabled positioning groove and the protective positioning groove take the central axis of the outer sleeve as the central reference, and the central angle between the closed positioning groove and the enabled positioning groove, and between the enabled positioning groove and the protective positioning groove is 90 degrees.

[0010] The end of the inner core extending out of the positioning rotating hole is provided with a plurality of twisting anti-slip convex ribs.

[0011] By adopting the above technical solution, the present invention has the following beneficial effects:

[0012] Compared with the prior art, the inner core in the present invention can rotate in one direction in the outer sleeve, and when the elastic positioning claw on the inner core and the enabled positioning groove on the outer sleeve are positioned and buckled, the outer needle body groove on both corresponds to the inner needle body groove. At this time, pulling the outer sleeve can drive the inner core to rotate around the folding plate, and make the needle body pass through the outer needle body groove and the inner needle body groove to leak out, so as to be used; when the elastic positioning claw on the inner core is positioned and buckled in the closed positioning groove and the protective positioning groove of the outer sleeve, the outer needle body groove and the inner needle body groove are misaligned, and even if the outer sleeve is pulled, it cannot be rotated to make the needle body leak out. Therefore, after use, the inner core can be relatively rotated to put the needle body into a closed state, thereby effectively avoiding punctures to medical staff and other personnel after use, thereby improving the safety of use.

[0013] Compared with the prior art, the closed positioning groove and the enabled positioning groove on the outer sleeve in the present invention are respectively provided with a rotating sliding surface on one side surface thereof, so that the elastic positioning claw on the inner core can only rotate in a clockwise direction, and there is no rotating sliding surface on the side surface of the protective positioning groove. Therefore, after use, that is, when the elastic positioning claw is in the protective positioning groove, the inner core and the outer sleeve bracket are locked and cannot rotate relative to each other, so that the needle body cannot leak out again, avoiding secondary use, and further improving the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a decomposition structure diagram of the present invention;

[0015] Figure 2 yes Figure 1 A magnified view of part A;

[0016] Figure 3 is a cross-sectional view of the present invention (in an unused state);

[0017] Figure 4 is a three-dimensional diagram of the outer coat of the present invention;

[0018] Figure 5 is a stereogram of the present invention (in a ready-to-use state);

[0019] Figure 6 It is a cross-sectional view of the present invention (in a ready-to-use state). DETAILED DESCRIPTION

[0020] The present invention will be further described in conjunction with the accompanying drawings.

[0021] like Figures 1 to 6 As shown, the present invention provides an anti-stab injection needle sheath structure, comprising a needle seat 1 and a needle body 2. The needle seat 1 is connected to a sheath structure that can cover the needle body 2. The sheath structure comprises a base 3, an outer sleeve 4, and an inner core 5. The base 3 is connected to the needle seat 1. The inner core 5 is arranged in the outer sleeve 4 and can rotate. The outer sleeve 4 is connected to the base 3 through a hinge structure. The hinge structure is preferably a folding plate 6. A snap connection groove 7 is arranged on the base 3. One end of the folding plate 6 is connected to the outer sleeve 4, and the other end is provided with a snap connection groove 7. The snap connection boss 8 is clamped in the snap connection groove 7, so as to realize the connection between the outer sleeve 4 and the base 3. The outer sleeve 4 can drive the inner core 5 to rotate synchronously relative to the base 3 through the folding plate 6, wherein the outer sleeve 4, the folding plate 6 and the snap connection boss 8 are designed as an integrated structure.

[0022] The outer sleeve 4 and the inner core 5 are respectively provided with an outer needle body through groove 9 and an inner needle body through groove 10 which can realize corresponding operation. A positioning rotation hole 11 is provided at the end of the outer sleeve 4. A closed positioning groove 12, an enabled positioning groove 13 and a protective positioning groove 14 are respectively provided on the inner side of the positioning rotation hole 11. The inner core 5 is inserted into the positioning rotation hole 11 and extends out of the outer sleeve 4. A plurality of anti-slip convex ribs 15 are provided at the end of the inner core 5 extending out of the positioning rotation hole 11, so as to facilitate the twisting of the inner core 5. An elastic positioning claw 16 is provided at the position of the inner needle body through groove 10 at the end of the inner core 5. The rotation of the inner core 5 in the outer sleeve 4 can make the elastic positioning claw 16 realize positioning buckles with the closed positioning groove 12, the enabled positioning groove 13 and the protective positioning groove 14 respectively. The closed positioning groove 12 and the enabled positioning groove 13 are respectively provided with a rotating sliding surface 17 on one side surface thereof. Therefore, when in use, the inner core 5 can only rotate in the outer sleeve 4 in the clockwise direction.

[0023] When not in use, the elastic positioning claw 16 is positioned and buckled with the closed positioning groove 12. At this time, the outer needle body through groove 9 and the inner needle body through groove 10 on the outer sleeve 4 and the inner core 5 are misaligned. Even if the outer sleeve 4 is turned, the needle body 2 cannot pass through and be exposed. When the inner core 5 is twisted for use, the elastic positioning claw 16 is positioned and buckled with the enabled positioning groove 13. At this time, the outer needle body through groove 9 and the inner needle body through groove 10 on the outer sleeve 4 and the inner core 5 correspond to each other. By turning the outer sleeve 4, the needle body 2 can pass through the two through grooves and be exposed for use. Moreover, the folding plate 6 can maintain an angle greater than 90 degrees between the outer sleeve 4, the inner core 5 and the needle body 2, which is convenient for operation and use while realizing the functions of the present invention. After use, the outer sleeve 4 and the inner core 5 are pulled back and screwed again The inner core 5 is rotated, and the elastic positioning claw 16 is positioned and buckled with the protective positioning groove 14. At this time, the outer sleeve 4 and the outer needle body through groove 9 and the inner needle body through groove 10 on the inner core 5 are misaligned, which is similar to the state when not in use. Even if the outer sleeve 4 is pulled, the needle body 2 cannot pass through and be exposed, so that the needle body 2 is still protected after the injection needle is used to prevent medical staff and other personnel from being stabbed, thereby improving the safety of use. Moreover, there is no sliding surface o on both sides of the protective positioning groove 14. The elastic positioning claw 16 cannot slide again when it falls into it, that is, the inner core 5 cannot rotate. At the same time, a non-detachable connection method is selected between the base 3 and the needle seat 1. This combination can prevent the injection needle from being used twice, further improving the safety of use.

[0024] Furthermore, one end of the inner core 5 is provided with a positioning step 18 that abuts against the side of the positioning rotary hole 11 , and the other end is correspondingly sleeved outside the end of the needle seat 1 , thereby improving the stability of the installation and positioning of the inner core 5 in the outer sleeve 4 .

[0025] Furthermore, an auxiliary rotating sliding surface 19 corresponding to the rotating sliding surface 17 is provided on one side of the elastic positioning claw 16, so as to facilitate the twisting of the inner core and make the operation more labor-saving.

[0026] Furthermore, the closed positioning groove 12, the enabled positioning groove 13, and the protective positioning groove 14 are based on the central axis of the outer sleeve 4, and the center angles between the closed positioning groove 12 and the enabled positioning groove 13, and between the enabled positioning groove 13 and the protective positioning groove 14 are 90 degrees; thereby limiting the inner core 5 to only be able to rotate 90 degrees each time. In view of the physiological structure of human fingers, 90 degrees of twisting by pinching human fingers is the limit for most people, thereby preventing the closed positioning groove 12 and the enabled positioning groove 13 from being too small during use, causing excessive twisting and affecting use; of course, the above-mentioned angles can also be processed and adjusted as needed.

[0027] The above is a detailed introduction to an anti-stab injection needle sheath structure provided by an embodiment of the present invention. Specific examples are used herein to illustrate the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the technical solutions disclosed by the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A stab-proof injection needle sheath structure, comprising a needle seat and a needle body, characterized in that: The needle seat is connected to a sheath structure that can cover the needle body, the sheath structure comprising a base, an outer sleeve, and an inner core, the base is connected to the needle seat, the inner core is arranged in the outer sleeve and can be rotated, the outer sleeve is connected to the base through a hinge structure, and can drive the inner core to rotate relative to the needle body; the outer sleeve and the inner core are respectively provided with an outer needle body through groove and an inner needle body through groove that can realize corresponding ones, the end of the outer sleeve is provided with a positioning rotation hole, and the inner side of the positioning rotation hole is respectively provided with a closed positioning groove, an enabled positioning groove, and a protective positioning groove, the inner core is inserted into the positioning rotation hole and extends out of the outer sleeve, and an elastic positioning claw is provided at the end of the inner core corresponding to the position of the inner needle body through groove, and the inner core rotates in the outer sleeve to enable the elastic positioning claw to realize positioning buckles with the closed positioning groove, the enabled positioning groove, and the protective positioning groove respectively, and the closed positioning groove and the enabled positioning groove are respectively provided with a rotating sliding surface on one side surface thereof, and when the elastic positioning claw and the enabled positioning groove are positioned and buckled, the outer needle body through groove corresponds to the inner needle body through groove; The hinged structure is a folding plate connected to the outer shell, one end of the folding plate is connected to the outer shell as an integral structure, and the other end is connected to the base; a snap connection groove is provided on the base, and a snap boss with an integral structure and snapped into the snap connection groove is provided on the folding plate.

2. The anti-stab needle sheath structure according to claim 1, characterized in that: One end of the inner core is provided with a positioning step which abuts against the side surface of the positioning rotating hole, and the other end is correspondingly sleeved outside the end of the needle seat.

3. The anti-stab needle sheath structure according to claim 1, characterized in that: A side surface of the elastic positioning claw is provided with an auxiliary rotating sliding surface corresponding to the rotating sliding surface.

4. The anti-stab needle sheath structure according to claim 1, characterized in that: The closed positioning groove, the enabled positioning groove and the protective positioning groove take the central axis of the outer sleeve as the central reference, and the central angle between the closed positioning groove and the enabled positioning groove, and between the enabled positioning groove and the protective positioning groove is 90 degrees.

5. The anti-stab needle sheath structure according to claim 2, characterized in that: The end of the inner core extending out of the positioning rotating hole is provided with a plurality of twisting anti-slip convex ribs.

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