JPH07504346A - Medical syringe with safety features - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Medical syringe with safety features Background of the invention: Present invention 1. t.Medical device for injecting into a living body.Specifically, this medical device should not be equipped with regarding safety features. Feature 1: Retractable to protect hypodermic syringe needles, etc. Regarding improvements to sleeves.

Published March 12, 1991 by Thomas See, Krasina [Can be pierced with a needle U.S. Patent No. 4,9 titled ``Safety Syringe Cap to Minimize Potential Risk of Injection.'' No. 98,922 discloses a safety device such as a hypodermic syringe. Mr. Krasina improvements to this patent by inventors including and/or working with Mr. Krasina. Disclosed in the present invention. For the sake of brevity, the teachings of this patent are incorporated herein by reference. The background technology should be included in the application and discussed to a minimum.

The prior art hypodermic syringe 1o shown in FIG. 12, the needle 16 has a beveled end 18 [the end into which the plunger 14 is inserted] It extends from the end of the cylindrical part 12 on the opposite side. Remove needle 16 for safety. It is covered with a removable cap 20. Problems to be solved and avoided (by users) If you accidentally pierce it with the tip 18 of the syringe 10 after use: :S If the tip 18 There is a possibility of carrying body fluids containing factors such as hepatitis B and AIDS. prick with a needle Accidents are a very common problem in the health industry, resulting in serious illness or In addition to the risk of even death, the insurance business also protects people who have been pricked with used needles. We spend more than $1 billion annually on testing.

Retractable as shown in Figures 2 and 3 in the 1979 patent by Alvarre A plastic protective sleeve 22 was proposed, and Asahi Alvarez's sleeve 22 was designed to protect the needle 1. 6 is fitted around the base of the inner hub 24 and the tip 18 passes through it. It has an outer hub 26. The inner and outer hubs 24,26 are connected by curved lamellas 28. connected. When the needle is inserted into the patient's body, the sleeve 22 is extended as shown in FIG. The force required to move from the position to the retracted position of FIG. 3 is shown in the graph of FIG.

Therefore, needlestick accidents occur in a variety of situations and there is virtually no safety measure. use Even if the rear sleeve 22 is fully extended, the user or bystander cannot When the sleeve 22 touches the tip slightly, the sleeve 22 retracts and the unlucky person I'm going to stab you with it.

The performance of the basic protective sleeve according to the above-mentioned Krasina patent is shown in FIG.

1 above to deform the protective sleeve from the extended position covering the tip 18. Requires force. 1: Spring-loaded locking collar protective sleeve By adding a Mostly hindered. Collar 1: Before the sleeve deformation shown in Figure 5 occurs must be moved from the locked position to the unlocked position. do not have. After use, the locking collar returns to the long position. Thus, hypodermic syringe Substantial contact with the tip ``In accident J, actual penetration of the tip 18 was prevented. must be raised.

The present invention, while making Kurashina's protective sleeve safer and easier to use, , intended to accommodate a variety of mounting configurations.

Other objects and advantages of the present invention (↓ will be apparent from the following description and attached drawings) .

summary: For the purposes mentioned above (, t, the base holding the proximal end of the hypodermic needle and the injection end of the hypodermic needle retractable consisting of a plurality of longitudinally extending laminae between an outer end that slidably covers the The following improvements have been made to hypodermic needles that are housed in sleeves: Ru.

The outer end is bell-shaped and slides into contact with the hypodermic needle located behind the injection end. Has a point.

The bell-shaped outer end of the hypodermic needle is transparent, so the injection end of the hypodermic needle from one manufacturer is the bell-shaped outer end. Visual inspection is possible from the area.

Attach the hypodermic needle to the medical device with the upper protrusion and retractable sleeve. Attachment means are provided having a base for releasably attaching. protrusion is a cylindrical projection having a cylindrical hole, and the attachment means is adapted to fit into the cylindrical hole. a cylindrical member having such dimensions and shape. A screw is shaped inside the cylindrical hole. The cylindrical member has a protrusion on the outside that fits into the internal thread of the hole, so with a retractable sleeve by screwing the cylindrical member into the cylindrical hole. A hypodermic needle can be removably attached to the protrusion.

The base is provided with grip wings that are provided radially and extend in the longitudinal direction. Ru. Additionally, the base is covered with i, t, retractable sleeves and supported on the vanes. A board cover is provided. Hard cover has interaction means on the inner surface . The interaction means pushes the vanes radially so that when the hardcover is rotated, the removal occurs. The attachment means is removed from the projection. This allows the hypodermic needle to be retracted. With a sleeve; 2. A hardware for attaching to or removing from a protrusion. A cover can be used.

Attach the hypodermic needle to the medical device (with the protrusion and retractable sleeve). Attachment means are provided having a base for releasably attaching. The base is a first portion for holding the proximal end of the hypodermic needle; and a first portion for holding the proximal end of the plurality of elongated flakes; It has a second part. At the base (top), insert the injection end of the hypodermic needle into the retractable sleeve. Means is provided for positioning the device in a predetermined orientation relative to the device. hypodermic needle injection Means for locating the end in a predetermined orientation relative to the retractable sleeve are provided in the first portion and and a second portion, which portions may be of unitary construction. Ma Additionally, this means (i.e., placing the injection end of the hypodermic needle in a predetermined position relative to the retractable sleeve) It has a base that holds it in the direction. Place the injection end of the hypodermic needle against the retractable sleeve. The means for positioning the mating portions of the first and second portions in the predetermined orientation also includes: have The first part and the second part (table: sleeve from which the injection end of the hypodermic needle can be retracted) They fit together only when they are in a predetermined orientation relative to each other. Also, retractable An indication means provided on the sleeve allows the user (to Know the predetermined orientation of the injection end of the hypodermic needle relative to the This allows the user to subcutaneously After positioning the injection end of the needle in the desired orientation (mi), retract the retractable sleeve. You can

The slide collar and biasing spring are provided on the retractable sleeve, and the spring is connected to the base. By being provided between the slide collar and the slide collar, the slide collar moves toward the outer end. When biased, keep the proximal end of the spring supported by the base on grip tab 1. hold

Providing forward and rearward projections on the lamina allows the sliding collar to move away from the outer edge. The tag prevents it from slipping, and the slide collar can be removably pulled when in use. When fixing in the closed position, the protrusion (the upper vertical plane adjacent to the base and the outer edge facing It is desirable to have a triangular shape with a slope. There is a cylindrical part inside the slide collar. It is desirable that the period extends to 10 minutes. Inner cylindrical part 1 top, slide collar is backward When moving to the retracted position behind the protrusion, it is engaged with a multi-turn spring. Also, Preferably, the sliding collar has an outwardly extending cylindrical portion. this cylinder shaped part (when the sliding collar is in the extended position held by the forward protrusion) If the front projection is It is protected by.

When used in dentistry, etc. (such as when multiple elongated holes are closer to the base than to the outer end) A plurality of elongated folded laminas are provided longitudinally adjacent the base. Then, it can be bent. retractable adjacent to the exposed injection end of the hypodermic needle Extended part of the slide collar that can be used without deforming outward when pulling in the outer end . In addition, the lamina (upper) always deforms outwards on the outside of the patient's mouth.

If the hypodermic needle is to be used only once, the protrusion should be triangular, with a rear protrusion. The portion has a vertical surface adjacent to the base and an inclined surface facing the outer end, and the forward projection has a vertical surface adjacent to the base and an inclined surface facing the outer end. and a vertical surface facing the outer end. Also adjacent to the outer edge By providing a retaining ridge member, the slide collar can pass through the retaining ridge member. The sliding collar passes through the forward protrusion and moves towards the outer end. There's nothing to do. Therefore, the locking collar (held by the rear protrusion) When released from the retracted position, it passes through the front protrusion due to the biasing force of the spring, and the front It is fixed between the side protrusion and the retaining ridge member.

Forward protruding thick strong back area for increased reliability and consistency of operation It may be provided in a plurality of lamina extending from the base to the base.

Also, make sure that there is no overlap in the area of the living hinge that is formed where you intend to bend. A number of elongated thin strips may be provided in the width direction.

Retractable sleeve Extends radially outward from the outer end to facilitate left-handed retraction. A grip area may be provided for release. Grip area has high friction surface Since the outer edge is covered with a slippery liquid, the user can safely remove the outer edge can be held and pulled longitudinally towards the base.

Living hinge (friend): insert multiple indentations into at least one of the multiple thin strips. It can be partially formed by providing it on the outer surface. multiple depressions (Table: A pattern representing the identification number of the retractable sleeve and hypodermic needle assembly.) It is formed.

Drawing description: Figure 1 (top) Simplification of a prior art hypodermic syringe with a removable protective cap FIG.

Figure 21. In the extended position, the needle is provided with a retractable protective sleeve of the prior art. FIG. 2 is a simplified partial cross-sectional view of the front portion of the hypodermic syringe.

Figure 3 (companion) Similar to Figure 2, the needle is provided with a retractable protective sleeve of the prior art. FIG. 3 is a simplified partial cross-sectional view of the front portion of the hypodermic syringe in a retracted position;

Figure 41 shows the force required to move the protective sleeve in Figure 2 to the position in Figure 3. It is a graph.

Figure 51 Good: Protective sleeve from extended position to retracted position by one of the inventors of the present invention It is a graph showing the force required for movement.

Fig. 6f; & Improvement according to the invention in which the needle is provided with a retractable protective sleeve 1 is a simplified partial cross-sectional view of the anterior portion of a hypodermic syringe; FIG.

FIG. 7 (table) is a partial sectional view of the device of FIG. 6.

FIG. 8 is a partial cross-sectional view of the hub portion of the device of FIGS. 6 and 7.

FIG. 91A is a cross-sectional view of the cap retaining collar of the apparatus of FIGS. 6-8; FIG.

FIG. 10 FIG.

FIG. 11 is an end view of the inner hub for holding the upper needle.

FIG. 121 Top is an end cross-sectional view of the inner hub for holding the needle.

Figure 131 Companion: The needle is equipped with a retractable protective sleeve.The sleeve has a spring attached to it. Further improved by the present invention in which a biased locking collar is provided. FIG. 2 is a simplified partial cross-sectional view of the anterior portion of the hypodermic syringe.

Figure 141 @ The cap retaining collar and the inner hub for retaining the needle are assembled. FIG.

Figure 15 (above) The cap retaining collar shown in Figure 14 and the interior for retaining the needle. It is a partial cross-sectional view of a state in which a side hub is assembled.

Figure 16 (Companion) The device shown in Figure 13 with the addition of a suitable protective cap. FIG.

Figure 17 (top) A retractable protective sleeve for the needle of the embodiment used in dentistry etc. according to the present invention. 1 is a simplified diagram of the front portion of a hypodermic syringe provided with a tube; FIG.

Figure 18E The needle is provided with the retractable protective sleeve of Figure 17 in the retracted position. 1 is a simplified partial cross-sectional view of the front portion of a hypodermic syringe; FIG.

Figure 191 top: The needle is equipped with a retractable protective sleeve. The beveled end of the needle is at the sleeve end. Simplification of the front part of the hypodermic syringe, which is aligned with the provided markings. FIG.

Table 201 is an end view of FIG. 19.

Figure 211 top: The locking collar, which is biased by the spring, is attached to the retracted position. Retractable needle according to an embodiment of the invention moves to an extended and locked position when in use Simplified section of the front part of the hypodermic syringe, which is provided with a possible protective sleeve FIG.

Figure 221A: Has a strong back to help fold the sleeve in a predetermined manner. The sleeve has a grip that helps if you need to pull the sleeve in by hand. A needle according to an embodiment of the invention provided in front of the needle is provided with a retractable protective sleeve. 1 is a simplified partial cross-sectional view of the front portion of a hypodermic syringe being opened; FIG.

Figure 231 top Living hinges to help break the sleeve in a predetermined manner In the present invention, an identification mark is provided as a part of the living hinge. Simplification of the front part of a hypodermic syringe in which the needle is provided with a retractable protective sleeve FIG.

Figure 24 (Top) Revival of Figure 23 showing how the identification mark is formed by a recess. FIG.

Description of preferred embodiments: The protective sleeve disclosed in the Krasina patent protects the needle attached to a hypodermic syringe. It is shown as a separate component on the base. Figures 6-121: l;t , a basic lacquer protective sleeve and a hypodermic syringe equipped with a sleeve. A number of possible modifications are shown.

In prior art hypodermic syringes, the base of the needle typically has a cylindrical portion extending from the cylindrical portion. In the embodiments of the invention shown in FIGS. A needle/sleeve assembly 30 is provided having a cylindrical hub assembly 32. . Hub assembly 32C: Cylindrical hub extending from the cylindrical portion 12 of the syringe 10 36 is screwed into the screw 34 provided inside. Hub assembly 321 inside It has a cylindrical outer hub 38 with a cylindrical inner hub 40 at the bottom. for placement purposes If necessary, the inner hub 401 is retained by a protrusion 42 that fits into a hole 44. Ru. Both hubs 38.40 are made of injection molded plastic. They are flexible enough to be snap-fitted together. 1 table on inner hub 40 It extends outward, and when the inner hub 40 is screwed into the outer hub 38, the screw 34 and A mating ear 46 is provided. In addition, the inner hub 40 (upper base end hole 48) The needle 16 is held concentrically.

A protective sleeve assembly 50 extends concentrically from the outer hub 38.

A hub 52 for holding the cap is provided at the proximal end of the protective sleeve assembly 50. Extending from the hub 52 is a retraction lamella 54 . The outer end of the thin piece 54 is an end cap. 56. A preferred end cap 56 shape is shown in FIGS. 6 and 7. ing. Central opening 58 (adjacent to the upper total 16, opening from the base of the tip 18, A transparent bell-shaped end 60 opens wide outwardly from the central opening 58 of the holder. bell-shaped End 601. ? , mold grinding in which the protective sleeve assembly 50 is formed as a unitary structure. The bell-shaped end portion 60 is preferably formed transparent in the polished portion. By being Can be inspected. Since the central opening 58 opens from the base of the tip 18, , from the protective sleeve assembly 501, attach the base of the tip 18 to the material of the protective sleeve assembly 50. It can be retracted without coming into contact with the material.

Also, since the diameter of the central opening 58 is approximately equal to the diameter of the needle 16, Foreign objects tend to be prevented from entering the protective sleeve assembly 50 located in the protective sleeve assembly 50.

Another improvement 1 shown in FIGS. 6 and 7: front and rear retention protrusions 62 and 64, both of which are triangular. In the experiment, triangles are It was discovered that it was easy to attach and that it was [cocked] for simultaneous use. If the locking collar is held securely in the retracted position, but the lamina 54 When the bent tag needle 16 is pulled in and straightened during use, it can be released reliably and quickly. Another important aspect of the invention is that it has been discovered that the device can be released and returned to the locked position. Base 1 of the lamina 54 adjacent to the side hub 38: a cap retaining hub 52 is provided. This is true. Cap holding hub 52 (friend) extends forward and is arranged radially. 0 wing JJi 68 with a disc portion 66 having a plurality of wings t168 ft, an inner hub relative to a cylindrical hub 36 extending from the cylindrical portion 12 of the syringe 10. used for twisting the tube 40. The disk portion 66 and the vanes 68 also cooperate. By doing so, it is possible to support the hard cover 70 shown by the imaginary line in Figure 9. Ru. Hard cover 7011. An inner protrusion 72 that fits between the wings 1Ji68 is provided. The inner hub is fully protected against the cylindrical hub 36 by Hard cover 70 can be used to twist 40 Company 01 It is also shown in the partially cutaway side view of FIG. 16. As shown, When press-fitting the guard cover 70, the disk portion 66 and the blade 68 can be held. 1: The open end 88 is tapered inward, so it cannot be removed for use. (Before) Mi Hardcover 70 will not be lost due to carelessness. hard cover 7o Other novel features of 1. For protected syringes filed on the same day as this application It is described in a patent application entitled Hardcover.

Other modifications and improvements are shown in FIG. Of course the Krasina patent As mentioned above (mi) Providing a spring-loaded locking collar on the protective covering. However, some modifications may be made to make it easier to assemble and operate. is possible. (Hold the inner end of the blade 68 and the inner end of the spring 76. Grip tabs 74 may be provided on the inner ends of vanes 68 for retention.

Also, by installing the inner cylindrical portion 80 on the locking collar 78, the spring 76 slides easily over the cylindrical portion 80 and remains fixed eastward in any case. Never. Additionally, the locking collar 78 may include an outer cylindrical portion 82. Therefore, if the front protrusion 62 is inadvertently pushed, the locking collar 78 and spring 76 is never released. Therefore, as shown in FIG. Since the portion 62 has a triangular shape as described above, the locking collar 78 (upper Slide on the front protrusion 62 and press the protrusion 62 inward for assembly. . For assembly, the locking collar 78 (,lt, after passing through the front protrusion 62, The normal holding position shown in FIG. 13 is a snap fit.

As described above, the inner hub 40 and the needle 16 are connected by the outer hub 38 and the hub 38. assembled in a special relative position to the protective sleeve assembly 50 held in place. If you need to find it, use example 1 + f.

A protrusion 42 or the like that fits into the fitting hole 44 may be provided. For those skilled in the art, 1'L It can be quickly recognized that assembly becomes difficult when aligning parts. follow (The embodiments shown in Figures 14 and 15 above are preferred) Delicious. In this case, a groove 84 is provided in the circumferential direction inside the outer hub 38, and the inner hub 40 is provided with a groove 84 in the circumferential direction. By providing a ridge 86 (continuous or discontinuous) in the outer circumferential direction of the When the hubs 38.4o are press-fitted together concentrically, the ridges 86 snap into the grooves 84. be taught. Additionally, serrations may be made in the longitudinal direction to prevent twisting. stomach.

17 and 18 show a protective sleeve assembly 50- used in dentistry, etc. ing. The forward portion 90 of the protective sleeve assembly 50' is free of slits and the rear portion 90 is free of slits. The lamina 54 is provided only at the minute 92. Therefore, as shown in Figure 18, 1:, protection In the bent or retracted position of the sleeve assembly 50- the needle 16 is slightly Only the minutes are exposed. In dental work (,t, such a slight exposure is sufficient. However, more importantly: outside the patient's mouth. the lamina 54 expands outward, which is more comfortable for the patient; It is also more convenient for dentists.

By bending the thin piece 54, the protective sleeve assembly 50 = Table i: Holding the needle 16 in its retracted position, the needle 16 is guided to the desired injection position.

It may be important to know the location of bevel 18. In such cases, Yokono When used in this manner, the embodiments shown in FIGS. 19 and 20 are effective.

The inner hub 40 that holds the inner end of the needle 16 (orientated with the beveled end 18) A positioning protrusion 96 is provided for this purpose. The outer side where the inner hub 40 fits a hole 94 provided in the hub 38 for receiving the upper positioning protrusion 96; A matching groove 98 is provided. Additionally, the bell-shaped end 60 of the protective sleeve assembly 50 A mark (for example, a protrusion as shown in Figure 19) is provided at (or any other convenient location). After assembling the above-mentioned parts, it is aligned with the beveled edge 18 using a well-known method. Ru. When assembled in this way as shown in FIGS. 19 and 20, the protrusion mark 100 The user can know that the beveled end 18 is also located above. Ru. When performing intradermal and subcutaneous injections using the needle 16, as shown in Figure 191 = 61. Preferably, the bottom of the bell-shaped end 60- is beveled rearwardly at the bottom thereof.

As shown in FIG. 02, the protective sleeve assembly 50' can be used once. It can be formed as a device for use. pre-cocked ), the protective sleeve assembly 50' is attached (as shown in phantom lines) to the protective sleeve assembly 50'. The locking collar 78 is attached, but in this state (see table) the needle is removed only after use. This is not a problem as the problem is that it stings. Before use (by accident, prick with a needle) I feel some pain, but that's usually all I feel. Locking collar after using the syringe -78C Table Release Tag Extend forward and lock as shown by arrow 104 moved to position. Normally, this forward movement is prevented by the front protrusion 62-. However, in this case, the locking collar 78 (the triangular diagonal of the front front protrusion 62) By sliding the face and pushing the protrusions 62-inward.

It passes through the protrusion 62-. Thereafter, the forward movement of the locking collar 78 is maintained by the retaining ridge. 102. At this time, the vertical surface of the triangular front protrusion 62- Since it is located behind the king collar 78, the locking collar 78 is in the retracted position. I can't go back. It is thus locked against reuse, making it suitable for multiple use. Ru.

Two further modifications to improve conditional performance are shown in Figure 22. Ru. A strong back 106 is provided rearward from the front protrusion 62 in the thin piece 54. so that the lamina 54 can bend at a point away from the bell-shaped end 60. . Depending on the case and shape of this structure (Table 1), the protective sleeve assembly 50 Placement and insertion methods have been found to make operations more reliable and consistent. For subcutaneous and intravenous injections, it is important to be able to see the tip 18 of the needle 16. When using it like this (the upper bell-shaped end 60 is pulled in by hand) the tip 8 must be exposed. Must be. In order to facilitate retraction (as shown in Figure 22, the bell-shaped end 6 The plastic of the protective sleeve assembly 50 extends outwardly adjacent to the rear of the Preferably, the grip ridges 107 are integrally molded onto the manufactured end cap 56. Special By providing grip ridges 107, when rubber is not used in the , the end cap 56 can be easily and reliably retracted without compromising the sterility of the needle tip. You can

Finally, depending on the situation and shape, the E thin piece 54 bends, so-called "living" 108 further improves performance consistency and reliability. As is well known to those skilled in the plastics technology, it has been discovered that The hinge is where the plastic material becomes thinner. any material It also bends on a thin line. However, the characteristics and description of plastics Living hinges made of plastic are self-energizing. It is a mold, so it does not fatigue or break like metal, and it also has medical equipment liability chart tracking. , and in a co-pending application entitled Disposal Methods and Apparatus, individual medical devices. The method of labeling allows for the tracking and accountability of medical devices. P For syringes protected by plastic sleeve assembly 50, identification ] 10 can be provided on the living hinge 108. Also, in reality, there are few At least partially 1: in the plastic protective sleeve assembly 50 identification as a series of depressions 112 at the hinge 108? to form 10 The living hinge 108 can be molded.

Having described the invention above, we claim the following scope: co〇 −μco

Claims (20)

[Claims] 1. Base that holds the bottom end of the hypodermic needle and allows the injection end of the hypodermic needle to slide within a retractable sleeve consisting of a plurality of longitudinally extending laminae between a covering outer end; Minimize the risk of injury from the injection end of the hypodermic needle This is an improvement to make it more difficult to The outer end has a sliding contact point with a hypodermic needle located behind the injection end. An improvement that is bell-shaped. 2. For a hypodermic needle disposed within a retractable sleeve according to claim 1. It is an improvement, The bell-shaped outer end of the hypodermic needle is transparent, so that the injection end of the hypodermic needle is transparent. Improvements that allow visual inspection from the above bell-shaped outer end. 3. Base that holds the bottom end of the hypodermic needle and allows the injection end of the hypodermic needle to slide within a retractable sleeve consisting of a plurality of longitudinally extending laminae between a covering outer end; In a hypodermic needle that is installed in a medical device that uses a hypodermic needle, This is an improvement that allows hypodermic needles to be attached and removed from medical equipment. So, a) a protrusion extending from the medical device; b) removably attaching a hypodermic needle with a retractable sleeve to said protrusion; and an attachment means having a base for attachment. 4. For a hypodermic needle disposed within a retractable sleeve according to claim 3. It is an improvement, a) the protrusion is a cylindrical protrusion having a cylindrical hole therein; b) the dimensions and shape of said attachment means to slidably fit into said cylindrical hole; An improvement comprising a cylindrical member having a shape. 5. For a hypodermic needle disposed within a retractable sleeve according to claim 4. It is an improvement, a) a thread is formed on the inside of the cylindrical hole, and b) protrudes on the outside of the cylindrical member. is provided with a protrusion, and the protrusion engages with the thread, thereby tightening the cylindrical member. is screwed into the cylindrical hole and, together with the retractable sleeve, inserts the hypodermic needle into the above-mentioned projection. Improved to be removably attached to the exit part. 6. For a hypodermic needle disposed within a retractable sleeve according to claim 3. It is an improvement, a) a base moth having radially arranged and longitudinally extending grip wings; b) furthermore, a hardware provided on the retractable sleeve and supported on said vane; having a cover, the hard cover is on the inner surface, pushing the wings in a radial direction When the hard cover is rotated, the mounting means can be removed from the protrusion. having interaction means for removing, whereby said hard cover is a retractable slider; Attach a hypodermic needle to the protrusion with a retractable sleeve. An improvement that can be used to remove a hypodermic needle from the protrusion. 7. Base that holds the bottom end of the hypodermic needle and allows the injection end of the hypodermic needle to slide within a retractable sleeve consisting of a plurality of longitudinally extending laminae between a covering outer end; In a hypodermic needle that is installed in a medical device that uses a hypodermic needle, , covered by a retractable sleeve while allowing the position of the injection end of the hypodermic needle to be determined. This is an improvement to ensure that the a) a protrusion extending from the medical device; b) removably attaching a hypodermic needle with a retractable sleeve to said protrusion; c) an attachment means having a base for attaching the base to the bottom end of the hypodermic needle; and a second portion that holds the bottom ends of the plurality of longitudinal lamellas. , and d) the base holds the injection end of the hypodermic needle in a predetermined position relative to the retractable sleeve. Improvements including means for placing in orientation. 8. For a hypodermic needle disposed within a retractable sleeve according to claim 7. It is an improvement, for positioning the injection end of the hypodermic needle in a predetermined orientation relative to the retractable sleeve. The first part and the second part forming the means are integrally constructed parts, and having a base that allows the injection end of the hypodermic needle to move upwardly against the retractable sleeve. Improvements that are arranged in a given orientation. 9. For a hypodermic needle disposed within a retractable sleeve according to claim 7. It is an improvement, for positioning the injection end of the hypodermic needle in a predetermined orientation relative to the retractable sleeve. The means has a mating portion of the first portion and the second portion, the mating portion being a skin when the injection end of the lower needle is positioned in the above predetermined orientation relative to the retractable sleeve. Improvements that only fit. 10. For a hypodermic needle disposed within a retractable sleeve according to claim 7. The improvement further comprises: a display means retained by a retractable sleeve; and the indicating means indicates a predetermined position of the injection end of the hypodermic needle relative to the retractable sleeve. By displaying the orientation to the user, the user can inject the hypodermic needle in the predetermined orientation. An improvement that allows the retractable sleeve to be retracted after the shooting end is placed. 11. For a hypodermic needle disposed within a retractable sleeve according to claim 10. An improvement in which the retractable sleeve has a bell-shaped end that covers the injection end of the hypodermic needle. further comprising a bottom portion beveled to the rear of the bell-shaped end; This makes it easier to administer subcutaneous and subcutaneous injections using a hypodermic needle. Improvements that can be made. 12. Base that holds the bottom end of the hypodermic needle and allows the injection end of the hypodermic needle to slide a retractable sleeve consisting of a plurality of longitudinally extending laminae between an outer end covering the A hypodermic needle with a retractable slide collar and biasing spring. the spring is provided between the base and the slide collar and the slider In a hypodermic needle that biases the ID collar toward the outer end, an undesirable spring This is an improvement to prevent the spring from moving, and is held at the base and grips the proximal end of the spring. An improvement having a grip tab means for 13. Base that holds the bottom end of the hypodermic needle and allows the injection end of the hypodermic needle to slide a retractable sleeve consisting of a plurality of longitudinally extending laminae between an outer end covering the A hypodermic needle with a retractable slide collar and biasing spring. the spring is provided between the base and the slide collar and the slider biasing the ID collar toward the outer end, the lamina is provided with forward and rearward protrusions; The protrusion prevents the sliding collar from sliding off the outer edge and prevents the sliding collar from sliding off the outer edge. In a hypodermic needle that is removably secured in the retracted position for use, the This is an improvement to increase reliability, The shape of the protrusion has a vertical surface adjacent to the base and an inclined surface facing the outer end. An improvement that is a triangle. 14. For a hypodermic needle disposed within a retractable sleeve according to claim 13. In addition, on the inside of the slide collar, there is a puller behind the rear protrusion. When the slide collar moves to the closed position, the cylindrical part that fits under the multi-turn spring will open. Extensive improvements. 15. For a hypodermic needle disposed within a retractable sleeve according to claim 13. In addition, the front protrusion is covered on the outside of the slide collar. protected from undesired deformation by and retained by the anterior projection above Avoid releasing the slide collar when it is in the extended position. An improvement in which the cylindrical part extends. 16. Base that holds the bottom end of the hypodermic needle and allows the injection end of the hypodermic needle to slide a hypodermic needle disposed within a retractable sleeve extending between the outer end and the outer end of the hypodermic needle; wherein the retractable sleeve includes a plurality of longitudinally foldable lamina. and by providing a longitudinal slot in the sleeve from which the lamina is retractable. An improvement for forming a hypodermic needle for use in dentistry, etc., having a plurality of slots located longitudinally closer to the base than the outer end; Thus, multiple longitudinally folded flakes are folded adjacent to the base for subcutaneous injection. The extended portion of the retractable sleeve adjacent the exposed injection end of the firing needle is located at the outer end. An improvement that prevents the part from deforming outward when it is pulled in. 17. Base that holds the bottom end of the hypodermic needle and allows the injection end of the hypodermic needle to slide a retractable sleeve consisting of a plurality of longitudinally extending laminae between an outer end covering the A hypodermic needle with a retractable slide collar and biasing spring. the spring is provided between the base and the slide collar and the slider Forces the slide collar toward the outer end and controls the movement of the slide collar in the lamina. For hypodermic needles that have a forward protrusion and a rear protrusion for An improvement that allows the firing pin to be used only once, a) It has a protrusion that is triangular in shape, with the rear protrusion extending from the vertical plane adjacent to the base and from the outside. having a slope facing the end, the forward protrusion having a slope adjacent to the base and the outer end; has a vertical surface facing, and b) having retaining ridge means, the ridge means having a sliding collar adjacent the outer end; and is adapted to prevent movement beyond the forward projection and toward the outer end. The locking collar is held by the rear projection above. When it is released from the retracted position, it passes through the front protrusion due to the biasing force of the spring, An improvement that is locked between said forward projection and said retaining ridge means. 18. Base that holds the bottom end of the hypodermic needle and allows the injection end of the hypodermic needle to slide a retractable sleeve consisting of a plurality of longitudinally extending laminae between an outer end covering the A hypodermic needle with a retractable slide collar and biasing spring. the spring is provided between the base and the slide collar and the slider The ID collar is biased toward the outer end, and the lamella is provided with forward and rearward projections, and the The protrusion prevents the sliding collar from sliding off the outer edge and prevents the sliding collar from sliding off the outer edge. In a hypodermic needle that is removably secured in the retracted position for use, the This is an improvement to increase reliability, Thickened into multiple longitudinal laminas extending proximally from each of the anterior projections. Improved strong back area has been provided. 19. Base that holds the bottom end of the hypodermic needle and allows the injection end of the hypodermic needle to slide a retractable sleeve consisting of a plurality of longitudinally extending laminae between an outer end covering the A hypodermic needle with a retractable slide collar and biasing spring. the spring is provided between the base and the slide collar and the slider biasing the ID collar toward the outer end, the lamina is provided with forward and rearward protrusions; The protrusion prevents the sliding collar from sliding off the outer edge and prevents the sliding collar from sliding off the outer edge. retractable in a hypodermic needle that is removably secured in the retracted position for use This is an improvement to make the slide easier to pull in by hand. a gripping area extending outward in the direction, the gripping area having a high friction surface; This allows the user to keep the outer edge secure even if it is covered with slippery liquid. Improved grip that can be pulled longitudinally towards the base. 20. Base that holds the bottom end of the hypodermic needle and allows the injection end of the hypodermic needle to slide a retractable sleeve consisting of a plurality of longitudinally extending laminae between an outer end covering the This is an improvement to increase the reliability of operation of the hypodermic needle installed in the This means that each of the plurality of longitudinal lamellas is bent at the position where it is intended to be bent. An improvement with a widthwise area forming a hinge.