TW201813680A - Safe protective cover for syringe by pressing with single finger to completely shield used needle - Google Patents

Abstract

The present invention provides a safe protective cover for syringe, which comprises: a ringlike joining base and a protection cover connected to the joining base through a connecting member. The protective cover can be moved back and forth between a first position and a second position. The safe protective cover is joined with the barrel of the syringe by the joining base. After using the syringe, the protective cover may be moved from the first position to the second position, so that the needle may be completely shielded by the protective cover.

Description

   Safety cover for injection needle   

The present invention relates to the safety protection of injection needles, and more specifically, it is a cover structure covering the outside of a used needle body by a single finger pressing action of a user.

For safety reasons, the needle used must be covered with a safety device to prevent the needle from coming into contact with or injuring others. The problems faced by the design and manufacture of safety devices include: First, the shape and structure of the safety device are too complex, so that the manufacturing cost is high and it is difficult to mass-produce. Secondly, the safety device excessively enlarged the volume and weight of the injection needle, which may affect the holding and operation of medical personnel. Third, waste needle recovery is billed based on weight and volume. Oversized and heavy safety devices increase the cost of waste needle recovery paid by medical institutions. Fourth, the original shape of the needle seat of the injection needle needs to be modified to match the safety device, so that it is more difficult to manufacture.

The invention provides a safety cover for an injection needle, which can specifically solve the above problems.

A safety protective cover for an injection needle, comprising: a combination seat including an inner ring and an outer ring; the outer ring surface of the inner ring is provided with a plurality of first positioning teeth and a plurality of second positioning teeth; The positioning teeth surround the front section of the outer wall of the inner ring, and a plurality of second fixed teeth surround the rear section of the outer wall of the inner ring; the first positioning tooth and the second positioning tooth each have an inclined surface, and the lowest sides of the inclined surface are respectively connected to The two end faces of the inner ring, and the highest side of the bevel is connected to the outer ring surface of the inner ring to form a stop surface; the inner ring mask of the outer ring has a first inner diameter section and a second inner ring. Diameter section, the inner diameter of the second inner diameter section is smaller than the inner diameter of the first inner diameter section, and a drop surface formed at the boundary between the second inner diameter section and the first inner diameter section; the second inner diameter The inner diameter of the segment is the same as the outer diameter of the inner ring; the outer ring is coupled to the outside of the inner ring; the stop surface of the second positioning tooth of the inner ring blocks the second end face of the outer ring; the drop of the outer ring The surface is stopped by the stop surface of the first positioning tooth of the inner ring; the outer ring and the inner ring can be relatively rotated; a cover includes a back plate, Two side plates connected to both sides of the back plate, and top plates connected to the top of the back plate and the top of the two side plates; the cover has a first accommodation space and a second accommodation space which are communicated with each other; the two One side of the side plate opposite to the inner wall surface of the second accommodation space is relatively extended with a snap tooth; the inner wall surface of one side plate of the first accommodation space is provided with a blocking piece, the blocking piece has a starting end and a The termination end is connected to the inner wall surface of the one side plate, and the termination end extends to the inside of the first accommodation space and approaches or contacts the inner wall surface of the other side plate. An obliquely intersecting connection, and the outer angle of the baffle connected to the side plate is greater than the inner angle; a connecting member is a flexible member, and its two ends are respectively connected to the outer ring and the back plate of the cover; through the connection The cover can move back and forth between a first position and a second position.

In a preferred embodiment, there is a fixed distance between each of the first positioning teeth and a fixed distance between each of the second positioning teeth; the position of the second positioning tooth is relative to the distance of the first positioning tooth .

In a preferred embodiment, the outer ring surface of the inner ring is provided with a plurality of micro-convex ribs parallel to the axis direction; the inner surface of the second inner diameter section is provided with a plurality of micro-convex ribs, and the outer periphery surrounds the When the inner ring rotates, the micro-convex ribs of the two are staggered with each other.

In a preferred embodiment, the top surface of the buckle teeth is a plane, and the bottom surface of the buckle teeth is a slope; the lowest point of the slope is connected to the inner wall surface of the side plate, and the highest point of the slope is connected to the buckle. The ends of the teeth.

In a preferred embodiment, the back plate of the cover has a non-slip surface.

In a preferred embodiment, a slip ring surface is formed on the outer surface of the syringe, and the inner ring is coupled to the slip ring surface.

Effects of the invention:

With the above structure, the inner ring of the combination seat is tightly sleeved on the outside of the barrel of an injection needle, and when using the injection needle for injection, the cover is in the first position; after the injection is completed, the cover is removed from the The first position is pushed to the second position; the cover of the second position, the two snap teeth are located under the needle seat of the injection needle, the needle seat is located in the second accommodation space of the cover, and the injection The needle tube of the needle is located in the first accommodation space through the blocking piece.

The combination of the inner ring and the outer ring prevents the two from detaching, ensuring that the cover is stably coupled to the injection needle without risk of detachment.

The outer ring can be rotated around the inner ring to adjust the position of the protective cover to prevent the protective cover from interfering with the operation of the syringe.

When the outer ring rotates around the inner ring, the micro-convex ribs of the two are staggered with each other, and there is a sense of stun when rotating. The micro-convex ribs also ensure the position of the outer ring on the inner ring without the risk of slipping easily. This also further ensures that the position of the cover does not slip randomly.

When the cover is in the first position, it will not interfere with the operation of the syringe.

When the cover is in the second position, the cover cannot return from the second position to the first position through the mutual locking relationship between the buckle and the needle seat, and the needle tube enters the cover through the cover of the cover. In the first accommodation space of the cover, the needle tube cannot be separated from the first accommodation space in the opposite direction. In other words, the needle tube is restricted from being in the first accommodation space and cannot be detached, and the cover completely covers the needle.

Through the restrictive relationship between the stopper and the needle tube, and the restrictive relationship between the snap teeth and the seat needle, the cover cannot be separated from the syringe and the needle seat unless the combining seat is pulled out of the syringe with a strong destructive force. If the coupling seat is detached from the syringe by a strong destructive force, the needle will also be detached from the syringe with the cover, and the needle will still be protected by the cover.

The ring-shaped coupling seat is combined with the syringe of the injection needle, the invention is easy to install on the injection needle, and the injection needle maintains the existing shape, and it is not necessary to make any structural modification for the installation of the invention.

The safety cover of the present invention can be manufactured independently, and its production line is not combined with the production line of injection needles. Avoid various problems caused by changing the production line of injection needles and the cost of solving them.

The safety cover of the present invention has a simplified shape and structure, is easy to manufacture, and can be mass-produced.

The safety cover of the present invention has a simplified volume and weight, and does not affect the holding and operation of the syringe by the medical care

The safety cover of the present invention does not greatly increase the weight and volume of waste needle recovery, and does not excessively increase the cost of waste needle recovery paid by the medical institution.

10‧‧‧Combination Block

11‧‧‧ Inner Ring

111‧‧‧face

112‧‧‧face

12‧‧‧ first positioning tooth

121‧‧‧ bevel

122‧‧‧ Stop surface

13‧‧‧ second positioning tooth

131‧‧‧ bevel

132‧‧‧stop surface

14‧‧‧ pitch

15‧‧‧ pitch

16‧‧‧Slightly raised ribs

21‧‧‧outer ring

211‧‧‧first end face

212‧‧‧Second end face

22‧‧‧ the first inner diameter section

23‧‧‧Second inner diameter section

24‧‧‧fall surface

25‧‧‧Micro convex rib

30‧‧‧ Cover

31‧‧‧back

32‧‧‧Side

33‧‧‧Side

34‧‧‧Top plate

35‧‧‧First accommodation space

36‧‧‧Second accommodation space

37‧‧‧Snap teeth

371‧‧‧Top

372‧‧‧ bevel

38‧‧‧baffle

381‧‧‧ start

382‧‧‧ Termination

39‧‧‧Slip surface

50‧‧‧ link

61‧‧‧syringe

63‧‧‧ Needle

631‧‧‧needle holder

632‧‧‧Syringe

633‧‧‧ flange

W ₁ ‧‧‧ Left and right width of the first accommodation space

W ₂ ‧‧‧ Left and right width of the second accommodation space

X ₁ ‧‧‧ the width of the front and rear axes of the first accommodation space

X ₂ ‧‧‧ Width of front and rear axis of second accommodation space

P1‧‧‧First position

P2‧‧‧Second position

θ ₁ ‧‧‧ outside angle

θ ₂ ‧‧‧inner angle

The first figure is a perspective view of the cover of the present invention.

The second figure is a side view of the cover of the present invention

The third figure is a top view of the cover of the present invention.

The fourth figure is a bottom view of the cover of the present invention.

The fifth figure is an exploded view of the combination seat of the protective cover of the present invention.

The sixth figure is a sectional view of the combination seat of the cover of the present invention.

The seventh figure is a sectional view taken along the line VII-VII in the third figure.

The eighth figure is a schematic view of combining the present invention with a syringe.

The ninth figure is a side view of the cover of the present invention covering the outside of the needle tube.

The tenth figure is a three-dimensional external view of the cover of the present invention covering the outside of the needle tube.

The eleventh figure is a front view of the cover of the present invention covering the outside of the needle tube.

The twelfth figure is the XII-XII sectional view of the eleventh figure.

In order to facilitate the description of the central idea of the present invention in the above-mentioned new content column, specific embodiments are expressed. Various objects in the embodiments are depicted in proportions, sizes, deformations, or displacements suitable for illustration, rather than in proportion to actual elements, which will be described together.

As shown in the first to fourth figures, the safety cover of the present invention is made of a plastic material allowed by the medical industry. It includes a combining base 10, a protective cover 30, and a connecting member 50 connecting the combining base 10 and the protective cover 30.

As shown in the fifth and sixth figures, the coupling seat 10 includes an inner ring 11 and an outer ring 21 coupled to the outside of the inner ring 11.

The inner ring 11 has a plurality of first positioning teeth 12 and a plurality of second positioning teeth 13 on an outer ring surface thereof. The plurality of first positioning teeth 12 surround the front section of the outer wall of the inner ring 11, and the plurality of second positioning teeth 13 surround the back section of the outer wall of the inner ring 11. There is a fixed distance 14 between each of the first positioning teeth 12 and a fixed distance 15 between each of the second positioning teeth 13; the position of the second positioning teeth 13 is relative to the distance of the first positioning teeth 12 14. The first positioning tooth 12 and the second positioning tooth 13 both have inclined surfaces 121, 131, and the lowest sides of the inclined surfaces 121, 131 are respectively connected to the two end faces 111, 112 of the inner ring 11, and the highest sides of the inclined surfaces 121, 131 pass through a stop surface. 122,132 are connected to the outer ring surface of the inner ring 11. The outer ring surface of the inner ring 11 is provided with a plurality of micro-convex ribs 16 parallel to the axis direction.

The inner ring mask of the outer ring 21 has a first inner diameter section 22 and a second inner diameter section 23. The first inner diameter section 22 extends inward from the first end surface 211 of the outer ring 21, The second inner diameter section 23 extends a distance inward from the second end surface 212 of the outer ring 21. The inner diameter of the second inner diameter section 23 is smaller than the inner diameter of the first inner diameter section 22. Therefore, a drop surface 24 is formed at the boundary between the second inner diameter section 23 and the first inner diameter section 22. The inner diameter of the second inner diameter section 23 is the same as the outer diameter of the inner ring 11. The inner surface of the second inner diameter section 23 is provided with a plurality of micro-convex ribs 25 in a direction parallel to the axial center.

The inner ring 11 is inserted into the outer ring 21 from the second end surface 212 of the outer ring 21. The inner ring 11 can smoothly pass through the second end surface 212 of the outer ring 21 and the second inner diameter section 23 through the inclined surface 121 of the first positioning tooth 12 until the stop of the second positioning tooth 13 of the inner ring 11. The surface 132 stops the second end surface 212 of the outer ring 21. At this time, the drop surface 24 of the outer ring 21 is also stopped by the stop surface 122 of the first positioning tooth 12 of the inner ring 11. That is, the two stop surfaces 122 and 132 of the inner ring 11 limit the second inner diameter section 23 of the outer ring 21, and the inner ring 11 cannot be separated from the outer ring 21. However, the outer ring 21 can rotate around the inner ring 11, and the micro-convex ribs 16, 25 of the two are staggered with each other, so there will be a sense of stun when rotating.

As shown in the first to fourth figures, the cover 30 includes a back plate 31, two side plates 32, 33 connected to both sides of the back plate 31, and a top plate of the back plate 31 and two side plates 32, 33. Top of the top plate 34. According to the geometric shapes and sizes of the back plate 31, the side plates 32, 33, and the top plate 34, a first accommodation space 35 and a second accommodation space 36 of the cover 30 are formed, and the two accommodation spaces are communicated. Around the first housing space 35 than the width W ₁ of the second housing space smaller lateral width W _2. The longitudinal axis of the first receiving space length than ₁ X 35 of the second housing space 36 of the front and rear small axial length X _2. The two side plates 32 and 33 respectively extend a latching tooth 37 relative to the inner wall surface of the second accommodating space 36 near the bottom end. The top surface 371 of the buckle tooth 37 is a plane, and the bottom surface of the buckle tooth 37 is a slope 372; the lowest point of the slope 372 is connected to the inner wall surface of the side plate 33, and the highest point of the slope 372 is connected to the buckle. The ends of the teeth 37. As shown in the third and seventh figures, a blocking piece 38 is provided on the inner wall surface of one side plate 33 of the first accommodation space 35. The blocking piece 38 has a start end 381 and a stop end 382, and the start end 381 is connected to the On the inner wall surface of the one side plate 33, the termination end 382 is close to or in contact with the inner wall surface of the other side plate 32, and the blocking piece 38 extends from the starting end 381 toward the inside of the first accommodation space 35 to the end of the termination end 382. Or until the inner wall surface of the other side plate 32 is contacted, the blocking piece 38 and the side plate 33 are connected at an oblique intersection, and the angle of the outer angle θ ₁ is greater than the angle of the inner angle θ ₂ . The back plate 31 of the cover 30 has a sliding surface 39 for finger contact.

As shown in the first to fourth figures, the connecting member 50 is a flexible member, and its two ends are respectively connected to the top edge of the outer ring 21 and the bottom edge of the back plate 31 of the cover 30. Through the connecting member 50, the cover 30 can be moved back and forth between the first position P1 and the second position P2.

As shown in the eighth figure, the cover of the present invention is mounted on an injection needle assembly. The injection needle has a known structure, and generally includes a syringe 61, a push rod (not shown), and a needle 63. The needle 63 further includes a needle base 631 and a needle tube 632. The push rod extends through the inside of the syringe 61 and can move back and forth. The needle 63 is sleeved on the neck section of the syringe 61 with a needle seat 631. In the protective cover 30 of the present invention, the inner ring 11 of the combined seat 10 is tightly sleeved on the outside of the syringe 61, and the two are tightly coupled. Alternatively, the slipper ring surface is formed on the outer surface of the syringe 61 (Fig. (Not shown), the inner ring 11 is combined with the anti-slip ring surface, which can further improve the stability of tight coupling with each other. When a medical staff uses an injection needle with the protective cover 30, the protective cover 30 is in the first position P1, and the outer ring 21 can be rotated to adjust the position of the protective cover 30 to prevent the protective cover 30 from interfering with the injection action.

As shown in Figures 9 to 12, after the injection is completed, the medical staff pushes the anti-slip surface 39 of the back plate 31 of the cover 30 with the index finger of the hand holding the syringe, and pushes the cover 30 from the first position P1 toward第二 位置 P2。 The second position P2. Before entering the second position P2, the latching teeth 37 of the cover 30 slide down from the flange 633 of the needle base 631 from the top through the inclined surface 372 below, so that the two locking teeth 37 are located on the needle base 631 Below the flange 633, the latching tooth 37 is snapped against the bottom surface of the flange 633 with its top surface 371, and the needle seat 631 enters the second receiving space 36 of the cover 30. Based on such a clamping relationship, the cover 30 cannot be returned from the second position P2 to the first position P1. At the same time, the needle tube 632 enters the first accommodation space 35 of the cover 30 through the blocking piece 38 of the cover 30. The characteristic of the blocking piece 38 is that it can swing inward from the outside to the inside, so that the needle tube 632 can smoothly pass through the first accommodating space 35; That is, after the needle tube 632 enters the first accommodating space 35, the needle tube 632 cannot be separated from the first accommodating space 35 in the opposite direction, in other words, the needle tube 632 is restricted in the first accommodating space 35 from now on. Can't escape.

Based on the above, the protective cover 30 completely shields the needle 63, and through the restrictive relationship between the blocking piece 38 and the needle tube 632, and the restrictive relationship between the snap teeth 37 and the flange 633 of the seat needle 631, the protective cover 30 cannot Disengage the syringe 61 and the needle base 631 unless the combining base 10 is pulled out of the syringe 61 with a strong destructive force. If the combining base 10 is separated from the syringe 61 by a strong destructive force, the needle 63 will also be separated from the syringe 61 together with the cover 30, and the needle 63 is still protected by the cover 30.

Claims (5)

    A safety protective cover for an injection needle, comprising: a combination seat including an inner ring and an outer ring; the outer ring surface of the inner ring is provided with a plurality of first positioning teeth and a plurality of second positioning teeth; The positioning teeth surround the front section of the outer wall of the inner ring, and a plurality of second fixed teeth surround the rear section of the outer wall of the inner ring; the first positioning tooth and the second positioning tooth each have an inclined surface, and the lowest sides of the inclined surface are respectively connected to The two end faces of the inner ring, and the highest side of the bevel is connected to the outer ring surface of the inner ring to form a stop surface; the inner ring mask of the outer ring has a first inner diameter section and a second inner ring. Diameter section, the inner diameter of the second inner diameter section is smaller than the inner diameter of the first inner diameter section, and a drop surface formed at the boundary between the second inner diameter section and the first inner diameter section; the second inner diameter The inner diameter of the segment is the same as the outer diameter of the inner ring; the outer ring is coupled to the outside of the inner ring; the stop surface of the second positioning tooth of the inner ring blocks the second end face of the outer ring; the drop of the outer ring The surface is stopped by the stop surface of the first positioning tooth of the inner ring; the outer ring and the inner ring can be relatively rotated; a cover includes a back plate, Side plates connected to both sides of the back plate, and top plates connected to the top of the back plate and the tops of the two side plates; the cover has a first accommodation space and a second accommodation space which communicate with each other; the two side plates An inner wall surface opposite to the second accommodation space is respectively extended with a snap tooth at a position close to the bottom end; an inner wall surface of one side plate of the first accommodation space is provided with a baffle, the baffle has a starting end and an end End, the starting end is connected to the inner wall surface of one of the side plates, and the terminating end extends to the inside of the first accommodation space and approaches or contacts the inner wall surface of the other side plate, and accordingly, the baffle is inclined with the side plate It is connected to the intersection, and the outer angle of the baffle and the side plate is greater than the inner angle; a connecting member is a flexible member, and its two ends are respectively connected to the outer ring and the back plate of the cover; through the connecting member The cover can move back and forth between a first position and a second position. With the above structure, the inner ring of the combination seat is tightly sleeved on the outside of a syringe of an injection needle, and when using the injection needle for injection , The cover is in the first position; After the shooting is completed, the protective cover is pushed from the first position to the second position; for the protective cover in the second position, the two snap teeth are located under the needle seat of the injection needle, and the needle seat is located in the cover In the second accommodation space, the needle tube of the injection needle is located in the first accommodation space through the blocking piece.         The safety protective cover for an injection needle according to claim 1, wherein each of the first positioning teeth has a fixed distance and each of the second positioning teeth has a fixed distance; the position of the second positioning teeth is relative The distance between the first positioning teeth.         The safety protective cover for an injection needle according to claim 1, wherein the outer ring surface of the inner ring is provided with a plurality of micro-convex ribs in a direction parallel to the axis; the inner surface of the second inner diameter section is provided with a plurality of micro-convex ribs. Convex ribs, when the outer part rotates around the inner ring, the micro convex ribs of the two are staggered with each other.         The safety protective cover for an injection needle according to claim 1, wherein the top surface of the snap teeth is a flat surface, and the bottom surface of the snap teeth is an inclined surface; the lowest point of the inclined surface is connected to the inner wall surface of the side plate, and the inclined surface The highest point of is connected to the end of the buckle tooth.         The protective cover for an injection needle according to claim 1, wherein the back plate of the protective cover has a non-slip surface.