TWM537487U - Safety protection cap of syringe - Google Patents

Description

Injection needle safety cover

This creation is related to the safety of the injection needle, and more specifically, a cover structure that covers the outside of the used needle body by a single finger pressing action of the user.

For safety reasons, the needle after use must be shielded with a safety device to prevent the needle from coming into contact with others or injuring others. The problems faced in the design and manufacture of safety devices include: First, the shape and construction of the safety device are too complicated, so that the manufacturing cost is high and mass production is difficult. Second, the safety device over-expands the volume and weight of the injection needle, which may affect the holding and operation of the medical staff. Third, waste needle recycling is billed by weight and volume. Oversized and heavy safety devices increase the cost of waste needle recycling paid by medical institutions. Fourth, in order to cooperate with the safety device, it is necessary to modify the original shape of the needle seat of the injection needle, so that it is more difficult to manufacture.

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

A safety protective cover for an injection needle, comprising: a coupling seat comprising 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 tooth surrounds the front wall portion of the inner ring of the inner ring, and the plurality of second fixed teeth surround the rear wall portion of the outer wall of the inner ring; the first positioning tooth and the second positioning tooth each have a slope, and the lowest sides of the slope are respectively connected Two end faces of the inner ring, the bevel a highest edge is formed by connecting with an outer annulus of the inner ring to form a stop surface; the inner ring of the outer ring has a first inner diameter segment and a second inner diameter segment, the second inner diameter segment The inner diameter is smaller than the inner diameter of the first inner diameter segment, a falling surface formed at the boundary between the second inner diameter segment and the first inner diameter segment; the inner diameter of the second inner diameter segment is outside the inner ring The outer ring is coupled to the outside of the inner ring, and the stop surface of the second positioning tooth of the inner ring blocks the second end surface of the outer ring, and the falling surface of the outer ring is the first positioning tooth of the inner ring The outer ring and the inner ring are relatively rotatable; a cover includes a back plate, two side plates respectively connected to the two sides of the back plate, and a top end of the back plate and the two side plates a top surface of the top cover; the cover has a first accommodating space and a second accommodating space; wherein the two side plates extend oppositely to the bottom end of the second accommodating space; a blocking piece is disposed on an inner wall surface of one of the first receiving spaces, the blocking piece has a starting end and a ending end, and the starting end Connecting to an inner wall surface of the one side plate, the terminating end extending toward the inner portion of the first receiving space and contacting or contacting the inner wall surface of the other side plate, whereby the blocking piece is obliquely intersected with the side plate, and The outer angle of the baffle is connected to the side plate by an angle greater than the inner angle; a connecting member is a flexible member, and the two ends are respectively connected to the outer ring and the back plate of the cover; through the connecting member, the cover can be Reciprocating between a first position and a second position.

In a preferred embodiment, each of the first positioning teeth has a fixed spacing, and each of the second positioning teeth has a fixed spacing; the position of the second positioning teeth is a spacing relative to the first positioning teeth. .

In a preferred embodiment, the outer ring surface of the inner ring is provided with a plurality of micro ribs in parallel with the axial direction; the inner surface of the second inner diameter segment is provided with a plurality of micro ribs parallel to the axial direction, and the outer ring is surrounded by the When the inner ring rotates, the micro ribs of the two are staggered with each other.

In a preferred embodiment, the top surface of the snap tooth is a flat surface, and the bottom surface of the snap tooth 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 end of the tooth.

In a preferred embodiment, the backing of the cover has a slip surface.

In a preferred embodiment, the outer surface of the barrel is formed with a slip ring surface that is coupled to the slip ring surface.

The effect of this creation:

With the above configuration, the inner ring of the binding seat is tightly sleeved on the outside of the syringe of the injection needle, and the cover is in the first position when the injection needle is used for injection; after the injection is completed, the cover is removed from the The first position is pushed to the second position; the second position is a cover, the two snap teeth are located under the needle seat of the injection needle, and the needle seat is located in the second accommodating space of the cover, the injection The needle tube of the needle is located in the first accommodating space through the flap.

The combination of the inner and outer rings prevents the two from disengaging, ensuring that the cover is stably bonded to the needle without detachment.

The outer ring is rotatable about the inner ring to adjust the position of the cover to prevent the cover from interfering with the operation of the syringe.

When the inner ring rotates around the inner ring, the micro ribs of the two are staggered with each other, and there is a feeling of rotation when the inner ring is rotated. The micro rib also ensures the position of the outer ring on the inner ring without any slipping. This further ensures the position of the cover and does not slip freely.

The cover does not interfere with the operation of the syringe when in the first position.

When the cover is in the second position, the cover cannot be returned from the second position to the first position by the mutual engagement relationship between the buckle and the needle seat, and the needle tube passes through the blocking piece of the cover Into the first accommodating space of the cover, the needle tube cannot be disengaged from the first accommodating space in the opposite direction. In other words, the needle tube is not restricted from being detached in the first accommodating space, and the cover completely shields the needle. .

Through the limited relationship between the flap and the needle tube, and the restraining relationship between the latching tooth and the seat pin, the cover cannot be disengaged from the syringe and the needle seat unless the binding seat is pulled away from the syringe with a strong destructive force. If the binding seat is disengaged from the syringe, the needle will also be disengaged from the syringe along with the cover, which is still protected by the cover.

The present invention is easy to mount to the injection needle by means of an annular coupling that is coupled to the needle of the injection needle, and the injection needle maintains the existing shape without any structural modification for the installation of the present invention.

The safety cover of this creation can be manufactured independently, and its production line is not combined with the production line of the injection needle. Avoid the problems caused by changing the production line of the injection needle and the cost of solving the problem.

The safety cover of this creation has a simple shape and structure, is easy to manufacture, and can be mass-produced.

The safety cover of this creation has a compact size and weight, does not affect the medical holding and operation of the syringe

The safety cover of this creation does not significantly increase the weight and volume of waste needle recycling, and does not excessively increase the cost of waste needle recycling paid by medical institutions.

10‧‧‧ combined seat

11‧‧‧ Inner Ring

111‧‧‧ end face

112‧‧‧ end face

12‧‧‧First positioning tooth

121‧‧‧Bevel

122‧‧‧ stop surface

13‧‧‧Second positioning tooth

131‧‧‧Bevel

132‧‧‧ stop surface

14‧‧‧ spacing

15‧‧‧ spacing

16‧‧‧ micro ribs

21‧‧‧ outer ring

211‧‧‧ first end face

212‧‧‧second end face

22‧‧‧First inner diameter section

23‧‧‧Second inner diameter section

24‧‧‧fall surface

25‧‧‧ micro ribs

30‧‧‧ Cover

31‧‧‧ Backplane

32‧‧‧ side panels

33‧‧‧ side panels

34‧‧‧ top board

35‧‧‧First accommodation space

36‧‧‧Second accommodation space

37‧‧‧Snap teeth

371‧‧‧ top surface

372‧‧‧Bevel

38‧‧‧Block

381‧‧‧start

382‧‧‧End

39‧‧‧Slip surface

50‧‧‧Links

61‧‧‧Syringe

63‧‧‧ needle

631‧‧‧ needle seat

632‧‧‧ needle

633‧‧‧Flange

W ₁ ‧‧‧The left and right width of the first accommodating space

W ₂ ‧‧‧The left and right width of the second accommodating space

X ₁ ‧‧‧ front and rear axle widths of the first accommodating space

X ₂ ‧‧‧ front and rear axle widths of the second accommodating space

P1‧‧‧ first position

P2‧‧‧ second position

θ ₁ ‧‧‧outer corner

θ ₂ ‧‧‧ interior angle

The first picture is a three-dimensional appearance of the creation cover.

The second picture is the side view of the creative cover

The third picture is a top view of the creative cover.

The fourth picture is a bottom view of the creative cover.

The fifth figure is an exploded view of the joint of the creation cover.

The sixth figure is a sectional view of the combined seat of the creation cover.

The seventh picture is a sectional view of VII-VII of the third figure.

The eighth picture is a schematic diagram of the combination of creation and syringe.

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

The tenth figure is a three-dimensional appearance of the creation cover covering the outside of the needle tube.

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

Figure 12 is a cross-sectional view of XII-XII of the eleventh figure.

For the convenience of the description, the central idea expressed in the column of the above novel content is expressed by a specific embodiment. Various items in the embodiments are depicted in terms of ratios, dimensions, amounts of deformation, or displacements that are suitable for illustration, and are not drawn to the proportions of actual elements, as set forth above.

As shown in Figures 1 to 4, the safety cover of this creation is made of plastic material allowed by the medical industry. A joint 10, a cover 30, and a joint 50 for connecting the joint 10 to the cover 30 are included.

As shown in FIGS. 5 and 6, the joint 10 includes an inner ring 11 and an outer ring 21 coupled to the outer portion 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 its outer ring surface. A plurality of the first positioning teeth 12 surround the outer wall front portion of the inner ring 11, and a plurality of the second fixed teeth 13 surround the outer wall rear portion of the inner ring 11. Each of the first positioning teeth 12 has a fixed spacing 14 therebetween, and each of the second positioning teeth 13 also has a fixed spacing 15; the position of the second positioning teeth 13 is phase For the spacing 14 of the first positioning teeth 12. The first positioning tooth 12 and the second positioning tooth 13 each have a slope 121, 131, and the lowest sides of the slopes 121, 131 are respectively connected to the two end faces 111, 112 of the inner ring 11, and the highest edge of the slopes 121, 131 passes through a stop surface. 122, 132 are connected to the outer annulus of the inner ring 11. The outer ring surface of the inner ring 11 is provided with a plurality of micro ribs 16 parallel to the axial direction.

The outer ring 21 has an inner ring portion having a first inner diameter portion 22 and a second inner diameter portion 23, the first inner diameter portion 22 extending inwardly from the first end surface 211 of the outer ring 21, The second inner diameter section 23 extends inwardly from the second end surface 212 of the outer ring 21 a distance. The inner diameter of the second inner diameter section 23 is smaller than the inner diameter of the first inner diameter section 22, thus forming a drop surface 24 at the interface of the second inner diameter section 23 with 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 ribs 25 in parallel with the axial direction.

The inner ring 11 fits into the outer ring 21 from the second end face 212 of the outer ring 21. The inner ring 11 can pass through the second end surface 212 of the outer ring 21 and the second inner diameter portion 23 through the inclined surface 121 of the first positioning tooth 12 until the second positioning tooth 13 of the inner ring 11 stops. The surface 132 stops the second end surface 212 of the outer ring 21, and at this time, the falling surface 24 of the outer ring 21 is also blocked by the stop surface 122 of the first positioning tooth 12 of the inner ring 11. That is, the two stop faces 122, 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 detached from the outer ring 21. However, the outer ring 21 is rotatable about the inner ring 11, and the micro-ribs 16, 25 of the two are staggered with each other, so that there is a feeling of rotation when rotated.

As shown in the first to fourth figures, the cover 30 includes a back plate 31, two side plates 32, 33 respectively connected to the two sides of the back plate 31, and a top end of the back plate 31 and the two side plates 32, 33. Top plate 34 at the top. According to the geometry and size of the back plate 31, the side plates 32, 33, and the top plate 34, one of the first accommodating space 35 and the second accommodating space 36 of the cover 30 is formed, and the two accommodating spaces are in communication. 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, 33 extend relative to the bottom end of the second accommodating space 36, respectively, to a latching tooth 37. The top surface 371 of the latching tooth 37 is a flat surface. The bottom surface of the latching tooth 37 is a sloped surface 372. The lowest point of the inclined surface 372 is connected to the inner wall surface of the side plate 33. The highest point of the inclined surface 372 is connected to the buckle. The end of the tooth 37. As shown in the third and seventh figures, a blocking piece 38 is disposed on the inner wall surface of the one side plate 33 of the first accommodating space 35. The blocking piece 38 has a starting end 381 and a terminating end 382. The starting end 381 is connected to the end. The inner wall surface of the one side plate 33 is adjacent 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 accommodating space 35 to the terminating end 382. Or contacting the inner wall surface of the other side plate 32, therefore, the flap 38 is obliquely intersected with the side plate 33, 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 slip surface 39 for contact with a finger.

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 joint 50, the cover 30 can reciprocate between the first position P1 and the second position P2.

As shown in the eighth figure, the creative cover is mounted on the schematic of the injection needle assembly. The injection needle is 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 holder 631 and a needle tube 632. The push rod penetrates inside the syringe 61 and is reciprocally movable. The needle 63 is sleeved to the neck portion of the barrel 61 by a needle holder 631. The inner cover 11 of the binding seat 10 is tightly sleeved on the outside of the syringe 61, and the two are tightly coupled with each other. Alternatively, the outer surface of the syringe 61 is formed with a slip ring surface. Not shown), the inner ring 11 is coupled to the anti-slip ring surface to further enhance the stability of the tight engagement with each other. When the medical staff uses the injection needle having the cover 30, the cover 30 is in the first position P1, and the outer ring 21 can be rotated to adjust the position of the cover 30 so as to prevent the cover 30 from interfering with the injection. action.

As shown in the ninth to twelfth drawings, after the injection is completed, the medical staff pushes the 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 the first position P1. Second position P2. Before entering the second position P2, the latching teeth 37 of the cover 30 are slid upwardly from the flange 633 of the needle holder 631 by the lower inclined surface 372 thereof, so that the two latching teeth 37 are located at the needle holder 631. Under the flange 633, the latching tooth 37 is engaged with the bottom surface of the flange 633 by its top surface 371, and the needle holder 631 enters the second receiving space 36 of the cover 30. Based on such a carding 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 accommodating space 35 of the cover 30 through the blocking piece 38 of the cover 30. The flap 38 is characterized in that it can be inwardly swung by the outward-inward thrust, so that the needle tube 632 can smoothly pass through the first accommodating space 35; however, the flap 38 cannot swing outward when subjected to the thrust from the inside to the outside. That is, after the needle tube 632 enters the first accommodating space 35, the needle tube 632 cannot be disengaged from the first accommodating space 35 in the opposite direction. In other words, the needle tube 632 is thus restrained in the first accommodating space 35. Can't leave.

Based on the above, the cover 30 completely shields the needle 63, and the cover 30 cannot be restricted by the restricting relationship of the flap 38 to the needle 632 and the restricting relationship of the snap tooth 37 to the flange 633 of the seat pin 631. The syringe 61 and the needle holder 631 are separated from each other unless the coupling seat 10 is pulled away from the syringe 61 with a strong destructive force. If the coupling seat 10 is disengaged from the syringe 61 by a strong destructive force, the needle 63 will also be disengaged from the syringe 61 together with the cover 30, which is still protected by the cover 30.

10‧‧‧ combined seat

11‧‧‧ Inner Ring

112‧‧‧ end face

21‧‧‧ outer ring

211‧‧‧ first end face

212‧‧‧second end face

25‧‧‧ micro ribs

30‧‧‧ Cover

31‧‧‧ Backplane

32‧‧‧ side panels

33‧‧‧ side panels

34‧‧‧ top board

35‧‧‧First accommodation space

36‧‧‧Second accommodation space

37‧‧‧Snap teeth

38‧‧‧Block

50‧‧‧Links

Claims (5)

A safety protective cover for an injection needle, comprising: a coupling seat comprising 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 tooth surrounds the front wall portion of the inner ring of the inner ring, and the plurality of second fixed teeth surround the rear wall portion of the outer wall of the inner ring; the first positioning tooth and the second positioning tooth each have a slope, and the lowest sides of the slope are respectively connected Two end faces of the inner ring, the highest side of the inclined surface is formed by a connection with the outer ring surface of the inner ring to form a stop surface; the inner ring of the outer ring has a first inner diameter segment and a second inner portion a diameter segment, an inner diameter of the second inner diameter segment being smaller than an inner diameter of the first inner diameter segment, and a falling surface formed at a boundary between the second inner diameter segment and the first inner diameter segment; 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 outer portion of the inner ring, and the stop surface of the second positioning tooth of the inner ring blocks the second end surface of the outer ring, and the outer ring has a drop The surface is blocked by the stop surface of the first positioning tooth of the inner ring; the outer ring and the inner ring are relatively rotatable; a cover, including a back plate, a side plate respectively connected to the two sides of the back plate, and a top plate connected to the top end of the back plate and the top end of the two side plates; the cover has a first receiving space and a second receiving space communicating with each other; the two side plates The inner wall surface of the second accommodating space is opposite to the bottom end, and a latching tooth is oppositely disposed. The inner wall surface of the one side of the first accommodating space is provided with a blocking piece, and the blocking piece has a starting end and a terminating end. The end end is connected to the inner wall surface of the one side plate, and the end end extends toward the inside of the first accommodating space and approaches or contacts the inner wall surface of the other side plate, according to which the visor is inclined with the side plate Connected to the intersecting connection, and the outer angle of the baffle is connected to the side plate is greater than the inner angle; a connecting member is a flexible member, the two ends of which are respectively connected to the outer ring and the back plate of the cover; The cover is reciprocally movable between a first position and a second position by the joint; by the above configuration, the inner ring of the joint is tightly fitted to the outside of the syringe of the injection needle, and the injection is used When the needle is injected, the cover is in the first position; after the injection is completed, the cover is pushed from the first position to the second position; the cover of the second position, the two snap teeth are located in the injection Under the needle seat of the needle, the needle seat is located in the second accommodating space of the cover, and the needle tube of the injection needle is located in the first accommodating space through the flap. The safety protective cover of the injection needle according to claim 1, wherein each of the first positioning teeth has a fixed spacing, and each of the second positioning teeth has a fixed spacing; the position of the second positioning teeth is relative The spacing of the first positioning teeth. The safety protective cover of the injection needle according to claim 1, wherein the outer ring surface of the inner ring is provided with a plurality of micro ribs in parallel with the axial direction; the inner surface of the second inner diameter segment is arranged in parallel with the axial direction The ribs, when the outer ring rotates around the inner ring, the micro ribs of the two are staggered with each other. The safety cover of the injection needle according to claim 1, wherein the top surface of the snap tooth is a flat surface, and the bottom surface of the snap tooth is a slope; the lowest point of the slope is connected to the inner wall surface of the side plate, the slope The highest point is connected to the end of the snap tooth. The safety cover of the injection needle according to claim 1, wherein the back plate of the cover has a slip surface.