TW202130379A - Wing-shaped needle protective sleeve can smoothly guide wings of the wing-shaped needle into accommodating slots between the extension parts to further receive needles in the wing-shaped needle protective sleeve - Google Patents

Abstract

The invention discloses a wing-shaped needle protective sleeve, which includes a base, a first extension part, a second extension part, and a third extension part. A first distal end of the first extension part has a first dominat bevel edge. A second distal end of the second extension part has a second dominat bevel edge. A third distal end of the third extension part has a third dominat bevel edge. The length of the first extension part is greater than or equal to the length of the second extension part, and the length of the second extension part is greater than the length of the third extension part. With the drop of the extension parts having different lengths and the guiding of the dominat bevel edges on the extension parts, the wings of the wing-shaped needle can be smoothly guided into accommodating slots between the extension parts to further receive the needles in the wing-shaped needle protective sleeve.

Description

Wing-shaped needle protective sleeve

The invention relates to a medical device, in particular to a wing-shaped needle protective cover.

Medically, a variety of needles with two wings are often used for blood or infusion operations, such as intravenous needles, indwelling needles, and blood sampling needles commonly known as butterfly needles or scalp needles. The thumb and index finger pinch, so that the nursing staff can more easily control the position of the needle when applying the needle, so it is especially suitable for use in some thin, difficult to inject, shallow blood vessels and injection sites.

After the wing-shaped needle is used up, the nursing staff must cover the original needle cover so that the needle tip with body fluids will not be exposed before discarding the wing-shaped needle, so as to prevent these used needles from being discarded and discarded. In the process of treatment, the treatment personnel are stuck, causing the infection of the disease and the damage of the treatment personnel.

When the needle cover is closed, due to the small opening of the needle cover, nursing staff must be particularly attentive and cautious to successfully cover the needle cover. However, the medical field is often very busy. Once the nursing staff is distracted or not paying attention, it is easy to be stabbed by the needle when the needle cover is covered. This will not only cause trouble for the nursing staff, but also risk of disease transmission.

In view of this, the present invention provides a wing-shaped needle protective cover, which allows users to store the wing-shaped needle in the protective cover in a very convenient manner.

In order to achieve the foregoing objective, the present invention discloses a wing-shaped needle protective sleeve, which includes a base, a first extension, a second extension, and a third extension. The base has a ring wall and a perforation surrounded by the ring wall; the first extension part extends from the ring wall and has a first proximal end connected to the ring wall and a distance away from the first proximal end A first distal end, the first distal end has a first main oblique side; a second extension part extends from the same side of the ring wall and the first extension part toward the first extension part in the same direction, having Connecting a second proximal end of the ring wall and a second distal end far from the second proximal end, the second distal end has a second main hypotenuse, and the first proximal end and the second proximal end are A first accommodating groove is formed between; a third extension part, which extends from the same side of the ring wall and the first extension part toward the first extension part in the same direction, and has a third proximal end connected to the ring wall And a third distal end far away from the third proximal end, the third distal end has a third main oblique side, and a second accommodating groove is formed between the second proximal end and the third proximal end, the A third accommodating groove is formed between the third proximal end and the first proximal end; wherein the length of the first extension portion is greater than or equal to the length of the second extension portion, and the length of the second extension portion is greater than the length of the second extension portion. The length of the third extension.

The present invention also provides a wing-shaped needle protective cover, which includes a base, a first extension, a second extension, a third extension, and a fourth extension. The base has a ring wall and a perforation surrounded by the ring wall; the first extension portion extends from the ring wall and has a first proximal end connected to the ring wall and a first proximal end away from the first proximal end The first distal end, the first distal end has a first main hypotenuse; the second extension portion extends from the same side of the ring wall and the first extension portion toward the first extension portion in the same direction, and has a connection with the A second proximal end of the ring wall and a second distal end far from the second proximal end, the second distal end has a second main hypotenuse, and the first proximal end and the second proximal end are formed between A first accommodating groove; a third extension portion extends from the same side of the ring wall and the first extension portion toward the first extension portion in the same direction, and has a third proximal end connected to the ring wall and away from the A third distal end of the third proximal end, the third distal end has a third main hypotenuse, and a second accommodating groove is formed between the second proximal end and the third proximal end; and a fourth extension Portion, extending from the same side of the ring wall and the first extension portion toward the first extension portion in the same direction, and has a fourth proximal end connected to the ring wall and a fourth distal end away from the fourth proximal end End, the fourth distal end has a fourth dominant hypotenuse, a third accommodating groove is formed between the third proximal end and the fourth proximal end, and between the fourth proximal end and the first proximal end A fourth accommodating groove is formed; wherein the length of the first extension is equal to or greater than the length of the second extension, and the length of the third extension is greater than the length of the fourth extension.

The invention uses the drop of each extension part of different lengths and the guiding of the leading bevel on the extension part, so that the wings of the wing-shaped needle can be smoothly guided into the accommodating groove, and then the needle is received in the wing-shaped needle With a protective cover.

As shown in FIGS. 1 and 2, the winged needle protective cover 10 provided by the present invention mainly includes a base 20, a first extension 30, a second extension 40 and a third extension 50.

As shown in Figures 2 to 5, the overall structural shape of the base 20 is roughly like a ring, which has a ring wall 21 and a perforation 22 surrounded by the ring wall 21. The ring wall 21 is provided with a plurality of Strip convex rib 23. The first extension 30 extends from the ring wall 21, and has a first proximal end 31 connected to the ring wall 21 and a first distal end 32 away from the first proximal end 31. The first distal end 32 has a first Leading hypotenuse 33. The second extension portion 40 extends from the same side of the ring wall and the first extension portion 30 toward the first extension portion 30 in the same direction, and has a second proximal end 41 connected to the ring wall 21 and a distance away from the second proximal end 41 A second distal end 42. The second distal end 42 has a second main oblique side 43, and a first accommodating groove 34 is formed between the first proximal end 31 and the second proximal end 41. The third extension portion 50 extends from the same side of the ring wall 21 and the first extension portion 30 toward the first extension portion 30 in the same direction, and has a third proximal end 51 connected to the ring wall 21 and a third proximal end 51 away from it. A third distal end 52 of the third distal end 52 has a third main oblique edge 53, and a second accommodating groove 44 is formed between the second proximal end 41 and the third proximal end 51, and the third proximal end A third accommodating groove 54 is formed between 51 and the first proximal end 31.

As shown in FIGS. 1 to 5, in the first embodiment of the present invention, the length of the first extension portion 30 is greater than the length of the second extension portion 40, and the length of the second extension portion 40 is greater than that of the third extension portion The length of 50. In addition, the inclination directions of the first main hypotenuse 33 and the second main hypotenuse 43 are the same, and the inclination directions of the second main hypotenuse 43 and the third main hypotenuse 53 are the same. The same tilt direction described in the description means that the direction of the bevel in clockwise or counterclockwise direction due to the gradual decrease in length is the same as the contrast guide bevel.

In this way, when a wing-shaped needle, such as a butterfly needle, is to be housed in the wing-shaped needle protective cover 10, there are the following situations.

First of all, the first case is as shown in Figs. 6 to 8. Since the first extension 30 is the longest, the left and right wings LW and the right wings RW of the wing-shaped needle will first abut to the first main guide. On the hypotenuse 33, at this time the left wing piece LW is suspended due to the short third extension portion 50, and the right wing piece RW is guided along the first main hypotenuse 33 between the first extension portion 30 and the second extension portion 40 , The wing-shaped needle is rotated, and the right wing piece RW is driven between the second extension part 40 and the third extension part 50, and finally the left and right wings LW and RW are respectively received in the second accommodating groove 44 and In the first accommodating groove 34. The second situation is that the left and right wings LW and RW on the needle just flash past the first extension 30, so that the right wing RW will first abut on the second dominant hypotenuse 43, and the left wing LW is still Because the third extension part 50 is short and suspended, the right wing piece RW will be guided along the second main hypotenuse 43 between the second extension part 40 and the third extension part 50, and the left wing piece LW will be guided. Lead to between the third extension portion 50 and the first extension portion 30, and finally the left and right wings LW and RW are respectively received in the third accommodating groove 54 and the second accommodating groove 44. In the third case, the right wing piece RW will first hit the first leading oblique side 33, and at this time, the left wing piece LW will hang in the air because the third extension 50 is shorter, and then the right wing piece RW will follow the first leading oblique side. The side 33 is guided between the first extension part 30 and the second extension part 40. At this time, the left wing piece LW is guided between the third extension part 50 and the first extension part 30, and finally the left and right wing pieces LW , RW are respectively received in the third accommodating groove 54 and the first accommodating groove 34.

In the fourth case, the left wing piece LW will first hit the first dominant hypotenuse 33. At this time, the right wing piece RW is suspended due to the short third extension 50. When the needle continues to be narrowed, the left wing piece LW will follow the first The main hypotenuse 33 is guided between the first extension portion 30 and the second extension portion 40, while the right wing piece RW is driven between the third extension portion 50 and the first extension portion 30, and finally the left and right wing pieces LW , RW are respectively received in the first accommodating groove 34 and the third accommodating groove 54. The fifth situation is that before the left wing piece LW on the needle hits the second dominant hypotenuse 43, the right wing piece RW will first hit the first dominant hypotenuse 33, and the right wing piece RW will be dominated by the first The hypotenuse 33 is guided between the first extension portion 30 and the second extension portion 40. During the guiding process, the left wing piece LW is then guided by the second main hypotenuse 43 to the second extension portion 40 and the third extension portion 40. Between the extensions 50, finally the left and right wings LW and RW are respectively received in the second accommodating groove 44 and the first accommodating groove 34. The sixth situation is similar to the fifth situation. Before the left wing piece LW reaches the third dominant hypotenuse 53, the right wing piece RW will first reach the second dominant hypotenuse 43. At this time, the right wing piece RW will be The second main hypotenuse 43 is guided between the second extension portion 40 and the third extension portion 50. During the guiding process, the left wing piece LW will then be guided by the third main hypotenuse 53 to the second extension portion 40. Between the third extension portion 50 and the third extension portion 50, the left and right wings LW and RW are finally received in the third accommodating groove 54 and the second accommodating groove 44, respectively.

Through the above description, the present invention utilizes the drop caused by the first extension portion 30, the second extension portion 40 and the third extension portion 50 of different lengths, so that the left and right wings LW and RW of the wing-shaped needle can be guided in the first Under the guidance of the hypotenuse 33, the second main oblique side 43, and the third main oblique side 53, the fins are received in the first accommodating groove 34, the second accommodating groove 44, or the third accommodating groove 54, and then used The used needles are housed in the wing-shaped needle protective cover 10. In addition, no matter which of the above is true, take Fig. 8 as an example, the left and right wings LW and RW of the needle have an angle of about 120 degrees, and the back BS of the needle has only one second extension 40. The ventral surface AS is surrounded by the first extension portion 30 and the third extension portion 50, so that the needle ventral surface AS with the protruding tube is properly received in the wing-shaped needle 10 without causing the needle ventral surface The AS has only one extension that surrounds the left and right wing pieces LW and RW, and the extension is damaged. When used in a medical field, the wing-shaped needle protective cover 10 provided by the present invention can smoothly receive the needle as long as the pipeline under the wing-shaped needle is pulled, which not only facilitates the operation of medical staff, but also effectively avoids busy situations. Under the circumstances, the needle cannot be properly collected due to distraction or carelessness, which will cause the medical staff to be infected by the needle tip.

Please also refer to FIGS. 9-11. In the second embodiment of the present invention, the first distal end 72 of the first extension 70 of the wing-shaped needle protective sleeve 60 has a first main bevel 73 And a first leading hypotenuse 75, the first leading hypotenuse 75 is opposite to the first leading hypotenuse 73, and the length of the first leading hypotenuse 73 is equal to the length of the first leading hypotenuse 75, A first rounded corner 76 is formed at the junction of a main hypotenuse 73 and the first hypotenuse 75. The second distal end 82 of the second extension part 80 has a second main hypotenuse 83 and a second hypotenuse 85. The second hypotenuse 85 and the second main hypotenuse 83 are inclined in the opposite direction, and the second hypotenuse The length of the main hypotenuse 83 is equal to the length of the second hypotenuse 85, and the intersection of the second main hypotenuse 83 and the second hypotenuse 85 forms a second rounded corner 86. The third distal end 92 of the third extension 90 has a third main hypotenuse 93 and a third hypotenuse 95. The third hypotenuse 95 and the third main hypotenuse 93 have opposite inclination directions, and the third main hypotenuse The length of the three main hypotenuse 93 is equal to the length of the third hypotenuse 95, and a third round corner 96 is formed at the junction of the third main hypotenuse 93 and the third hypotenuse 95. The inclination direction described in the description is opposite, which means that the direction of the inclined plane in the clockwise or counterclockwise direction due to the gradual decrease in length is different from the contrast guide bevel. Thereby, through the opposing main hypotenuse and the secondary hypotenuse, the distal ends of the first extension 70, the second extension 80 and the third extension 90 form a symmetrical convex structure, and the main hypotenuse and the rear A V-shaped notch is formed between the secondary hypotenuses of an extension (for example, between the first main hypotenuse 73 and the second secondary hypotenuse 85), so that the left and right wings LW, RW of the wing-shaped needle It can be stored in the wing-shaped needle protective sleeve 60 more smoothly.

However, different extensions can also be mixed with a structure having a leading hypotenuse and both a leading hypotenuse and a secondary hypotenuse. For example, as shown in Figures 12 to 14, in the third embodiment of the present invention, the first extension 110 of the wing-shaped needle protective sheath 100 is the same as the first embodiment, and the first distal end 112 only has the first extension part 110. A main hypotenuse 113, but the second distal end 122 of the second extension 120 has a second main hypotenuse 123 and a second hypotenuse 125 opposite to the second main hypotenuse 123, and the second main hypotenuse The length of the hypotenuse 123 is greater than the length of the second hypotenuse 125, and the third distal end 132 of the third extension 130 has a third main hypotenuse 133 and a third hypotenuse 135, and the third hypotenuse The inclination direction of the third main hypotenuse 135 is opposite to that of the third main hypotenuse 133, and the length of the third main hypotenuse 133 is greater than the length of the third subordinate hypotenuse 135. Thereby, the first extension part 110 has a single guiding hypotenuse, and the distal ends of the second extension part 120 and the third extension part 130 have an asymmetrical convex tip structure, so that the wing-shaped needle can be smoothly inserted into the wing. Type needle protective sleeve 100 in the middle.

Please refer to FIGS. 15-17 again. In the fourth embodiment of the present invention, the first distal end 152 of the first extension 150 of the wing-shaped needle protective sleeve 140 has a first main hypotenuse 153 As with the first hypotenuse 155, the length of the first main hypotenuse 153 is greater than the length of the first hypotenuse 155. The second distal end 162 of the second extension 160 has a second main hypotenuse 163 and a second secondary hypotenuse 165, and the length of the second main hypotenuse 163 is greater than the length of the second hypotenuse 165. The third distal end 172 of the third extension 170 has a third main hypotenuse 173 and a third secondary hypotenuse 175, and the length of the third main hypotenuse 173 is greater than the length of the third secondary hypotenuse 175. Wherein, the length of the first extension portion 150 is equal to the length of the second extension portion 160, and the length of the second extension portion 160 is greater than the length of the third extension portion 170. Thereby, the first extension 150, the second extension 160, and the third extension 170 all have an asymmetrical protruding tip structure, plus the first extension 150 and the second extension 160 with the same length, so that the wings The type needle can be smoothly accommodated in the wing-shaped needle protection sleeve 140.

In addition to the above three extensions, the present invention can also be designed into a structure of four extensions. For example, as shown in Figures 18 and 19, in the fifth embodiment of the present invention, the wing-shaped needle protective sleeve 180 has a first extension 190, a second extension 200, a third extension 210, and a fourth extension. Each of the extension portions 220 has an asymmetrical convex tip structure. Wherein, a third accommodating groove 214 is formed between the third proximal end 211 and the fourth proximal end 221, and a fourth accommodating groove 224 is formed between the fourth proximal end 221 and the first proximal end 191; and a first extension portion The length of 190 is greater than the length of the second extension portion 200, and the length of the third extension portion 210 is greater than the length of the fourth extension portion 220.

What must be explained here is that the detailed description above in conjunction with the drawings is only provided for the purpose of illustrating the technical content and features of the present invention. It is only for those who have general knowledge in the field of the present invention to understand the present invention. After the technical content and features of the invention, all simple modifications, replacements, or reductions in components made without departing from the spirit of the present invention should fall within the scope of the patent application disclosed below.

10, 60, 100, 140, 200: Wing-shaped needle protective sleeve 20: base 21: Ring Wall 22: Piercing 23: convex rib 30, 70, 110, 150, 190: first extension 31: first proximal 32, 72, 112, 152: the first remote 33, 73, 113, 153: the first dominant hypotenuse 34: The first housing tank 40, 80, 120, 160, 200: second extension 41: second proximal 42, 82, 122, 162: second remote 43, 83, 123, 163: second dominant hypotenuse 44: second holding tank 50, 90, 130, 170, 210: third extension 51, 211: third proximal 52, 92, 132, 172: third far end 53, 93, 133, 173: the third dominant hypotenuse 54, 214: third accommodating slot 75, 155: Lead the bevel for the first time 76: first fillet 85, 125, 165: second lead hypotenuse 86: second fillet 95, 135, 175: third lead hypotenuse 96: third fillet 220: fourth extension 221: Fourth Near End 224: The fourth holding tank LW: Left Wing Piece RW: Right Wing Piece BS: The back of the needle AS: Needle ventral

Figure 1 is a perspective view of the wing-shaped needle protective sleeve disclosed in the first embodiment of the present invention; Figure 2 is another perspective view of the first embodiment; Figures 3, 4, and 5 are side views of the first embodiment at different angles, respectively showing the first extension, the second extension, and the third extension; Figure 6 is a three-dimensional view of the first embodiment when it is in use, which mainly shows the situation where the wing-shaped needle is ready to be stored in the wing-shaped needle protective cover; Figure 7 is a three-dimensional view of the first embodiment when it is in use, which mainly shows the situation where the wing-shaped needle is housed in the wing-shaped needle protective cover; Figure 8 is a top view of the first embodiment when it is in use, which mainly shows the wing-shaped needle inserted into the wing-shaped needle protective cover; Figures 9, 10, and 11 are side views of the wing-shaped needle protective sleeve disclosed in the second embodiment of the present invention at different angles, respectively showing the first extension, the second extension, and the third extension; Figures 12, 13, and 14 are side views of the wing-shaped needle protective sleeve disclosed in the third embodiment of the present invention at different angles, respectively showing the first extension, the second extension, and the third extension; Figures 15, 16, and 17 are side views at different angles of the wing-shaped needle protective sleeve disclosed in the fourth embodiment of the present invention, respectively showing the first extension, the second extension, and the third extension; and Figures 18 and 19 are side views of the wing-shaped needle protective sleeve disclosed in the fifth embodiment of the present invention at different angles, respectively showing the third extension and the fourth extension.

10: Wing-shaped needle protective sleeve

20: base

23: convex rib

30: first extension

33: The first dominant hypotenuse

40: second extension

43: second dominant hypotenuse

50: third extension

53: The third dominant hypotenuse

Claims (24)

A wing-shaped needle protective cover, including: A base with a ring wall and a perforation surrounded by the ring wall; A first extension part extending from the ring wall, having a first proximal end connected to the ring wall and a first distal end far away from the first proximal end, the first distal end having a first main oblique side; A second extension part extends from the same side of the ring wall and the first extension part toward the first extension part in the same direction, and has a second proximal end connected to the ring wall and a distance away from the second proximal end A second distal end, the second distal end has a second main oblique side, and a first accommodating groove is formed between the first proximal end and the second proximal end; and A third extension part extends from the same side of the ring wall and the first extension part toward the first extension part in the same direction, and has a third proximal end connected to the ring wall and a distance away from the third proximal end A third distal end, the third distal end has a third main oblique side, and a second accommodating groove is formed between the second proximal end and the third proximal end, the third proximal end and the first A third accommodating groove is formed between the proximal ends; Wherein, the length of the first extension portion is greater than or equal to the length of the second extension portion, and the length of the second extension portion is greater than the length of the third extension portion. The wing-shaped needle protective cover according to claim 1, wherein the second main oblique side and the first main oblique side have the same inclination direction. The wing-shaped needle protective cover according to claim 2, wherein the inclination direction of the third main hypotenuse and the second main hypotenuse are the same. The wing-shaped needle protective cover according to any one of claims 1 to 3, wherein the first distal end has a first leading bevel edge, and the inclination of the first leading bevel edge and the first leading bevel edge The directions are opposite, and a first rounded corner is formed at the junction of the main hypotenuse and the first hypotenuse. The wing-shaped needle protective cover according to claim 4, wherein the length of the main bevel is greater than the length of the first bevel. The wing-shaped needle protective cover according to claim 4, wherein the length of the first main hypotenuse is equal to the length of the first hypotenuse. The wing-shaped needle protective cover according to any one of claims 1 to 3, wherein the second distal end has a second hypotenuse, and the second hypotenuse and the second main hypotenuse are inclined The direction is opposite, and a second rounded corner is formed at the junction of the second leading hypotenuse and the second secondary leading hypotenuse. The wing-shaped needle protective cover according to claim 7, wherein the length of the two main hypotenuses is greater than the length of the second hypotenuse. The wing-shaped needle protective cover according to claim 7, wherein the length of the two main hypotenuses is equal to the length of the second hypotenuse. The wing-shaped needle protective cover according to any one of claims 1 to 3, wherein the third distal end has a third hypotenuse, and the third hypotenuse and the third main hypotenuse are inclined The directions are opposite, and a third rounded corner is formed at the junction of the third leading hypotenuse and the third secondary leading hypotenuse. The wing-shaped needle protective cover according to claim 10, wherein the length of the three main hypotenuse is greater than the length of the third hypotenuse. The wing-shaped needle protective cover according to claim 10, wherein the length of the three main hypotenuse is equal to the length of the third hypotenuse. A wing-shaped needle protective cover, including: A base with a ring wall and a perforation surrounded by the ring wall; A first extension part extending from the ring wall, having a first proximal end connected to the ring wall and a first distal end far away from the first proximal end, the first distal end having a first main oblique side; A second extension part extends from the same side of the ring wall and the first extension part toward the first extension part in the same direction, and has a second proximal end connected to the ring wall and a distance away from the second proximal end A second distal end, the second distal end has a second main oblique side, and a first accommodating groove is formed between the first proximal end and the second proximal end; A third extension part extends from the same side of the ring wall and the first extension part toward the first extension part in the same direction, and has a third proximal end connected to the ring wall and a distance away from the third proximal end A third distal end, the third distal end has a third main hypotenuse, and a second accommodating groove is formed between the second proximal end and the third proximal end; and A fourth extension part extends from the same side of the ring wall and the first extension part toward the first extension part in the same direction, and has a fourth proximal end connected to the ring wall and a distance away from the fourth proximal end A fourth distal end, the fourth distal end has a fourth main hypotenuse, a third accommodating groove is formed between the third proximal end and the fourth proximal end, and the fourth proximal end is connected to the first A fourth accommodating groove is formed between the proximal ends; Wherein, the length of the first extension portion is equal to or greater than the length of the second extension portion, and the length of the third extension portion is greater than the length of the fourth extension portion. The wing-shaped needle protective cover according to claim 13, wherein the second main oblique side and the first main oblique side have the same inclination direction. The wing-shaped needle protective cover according to claim 14, wherein the third main oblique side and the second main oblique side have the same inclination direction. The wing-shaped needle protective cover according to any one of claims 13 to 15, wherein the first distal end has a first leading bevel edge, and the inclination of the first leading bevel edge and the first leading bevel edge The directions are opposite, and a first rounded corner is formed at the junction of the main hypotenuse and the first hypotenuse. The wing-shaped needle protective cover according to claim 16, wherein the length of the main bevel is greater than the length of the first bevel. The wing-shaped needle protective cover according to claim 16, wherein the length of the first main hypotenuse is equal to the length of the first hypotenuse. The wing-shaped needle protective cover according to any one of claims 13 to 15, wherein the second distal end has a second hypotenuse, and the second hypotenuse and the second main hypotenuse are inclined The direction is opposite, and a second rounded corner is formed at the junction of the second leading hypotenuse and the second secondary leading hypotenuse. The wing-shaped needle protective cover according to claim 19, wherein the length of the two main hypotenuses is greater than the length of the second hypotenuse. The wing-shaped needle protective cover according to claim 19, wherein the length of the two main hypotenuses is equal to the length of the second hypotenuse. The wing-shaped needle protective cover according to any one of claims 13 to 15, wherein the third distal end has a third hypotenuse, and the third hypotenuse and the third main hypotenuse are inclined The directions are opposite, and a third rounded corner is formed at the junction of the third leading hypotenuse and the third secondary leading hypotenuse. The wing-shaped needle protective cover according to claim 22, wherein the length of the three main hypotenuse is greater than the length of the third hypotenuse. The wing-shaped needle protective cover according to claim 22, wherein the length of the three main hypotenuse is equal to the length of the third hypotenuse.

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