JP5105434B2 - Syringe needle cover - Google Patents

Description

  The present invention relates to a needle cover of a syringe.

  The syringe is provided with a needle cover that covers the needle for the purpose of ensuring the safety of the user. The general shape of the needle cover is a sack shape and is formed of a synthetic resin or the like having a relatively high rigidity.

  The needle cover is attached to the needle in advance when not in use, and is used by removing it when in use. Further, after use, it is attached again and discarded together with the syringe. Therefore, it may be usually removed once at the time of use and attached and detached once after use, but the liquid is often ejected in a divided manner, thereby increasing the number of times of attachment and detachment. A needle stick accident to the fingertip has occurred during these attachments and detachments. Considering this point, a method of attaching a needle cover to a used syringe for the purpose of preventing a needle stick accident has been proposed. (For example, see Patent Document 1)

In the invention of the above-mentioned Patent Document 1, a protective rod provided with a hole having a diameter that can be tightly attached to a large-diameter portion of a needle cover attached to a syringe needle is prepared, and the protective rod is accessible from the outside. Store the required number in the storage device, insert the pre-use syringe pre-attached with the needle cover into the storage device, tightly attach the needle cover and the protective rod, then remove the needle cover from the syringe and inject the syringe And attach the needle cover with the protective rod again to the used syringe.
Japanese Patent Laid-Open No. 2001-224686

The needle cover described in Patent Document 1 is an excellent one that can prevent a needle stick accident, but requires a protective gutter as a separate member and requires a storage device, which makes the handling complicated. Also, the need for installation location arises.

  The present invention has been made in view of the above points, and proposes a needle cover of a syringe that can be easily handled with a simple structure and can reliably prevent a needle stick accident.

  The needle cover of the syringe in the present invention is fitted from the side to the tip of the syringe to cover the needle. The target syringe is a general one, and includes, for example, a syringe body having a small-diameter portion at the tip, and a needle protruding from the small-diameter portion via a needle mounting member. In this case, the needle mounting member may be fitted to the outer periphery of the small diameter portion or may be fitted to the inner periphery of the small diameter portion.

  The needle cover includes a ring-opening cylindrical portion having a lower portion as a fitting portion that is forcibly fitted to the distal end portion of the syringe body, and an upper portion as a needle housing portion that accommodates a needle protruding from the syringe body. The front opening of the housing portion is closed with a closing wall provided with a needle insertion port that can be moved in and out by forced pressing of the needle.

  The ring-opening cylindrical portion is preferably shaped according to the shape of the tip of the syringe main body to be attached, and is generally a ring-opening cylindrical shape, but may be a shape matched to the tip portion such as a ring-opening polygonal shape. The distal end portion of the dispensing cap body usually indicates the small diameter portion of the distal end. For example, when the proximal end portion of the needle mounting member is fitted and attached to the outer periphery of the small diameter portion, the proximal end portion of the needle mounting member Consider the outer circumference as the tip of the body.

  The needle cover can be formed as a whole or composed of a base with an annular cylindrical part and a closed wall that is formed separately and closes the front opening of the needle housing part and is fixed to the base. You may do it. As these materials, synthetic resins and elastomers can be appropriately selected and used.

  The ring-opening cylindrical portion generally adopts an ring-opening cylindrical shape in which the upper end is closed and the lower end is opened. However, the ring-opening cylindrical shape in which the upper end and the lower end are opened may be employed. In that case, as a matter of course, the length of the ring-opening cylindrical portion is set to a length that can accommodate the needle. The fitting portion needs to have a diameter that matches the tip of the syringe body, but the needle housing portion only needs to accommodate a needle having a smaller diameter than the syringe body. Therefore, even if the diameter of the fitting portion is the same as the diameter of the needle housing portion, the diameter of the needle housing portion may be made smaller. However, when the diameters are different from each other, it is preferable that the centers be at the same position.

  The cover may be provided with a guide protrusion. The guide protrusions are provided to make it easier to fit the fitting part to the tip of the syringe body, and adopt a form that projects forward from both side edges of the front opening of the fitting part. . In this case, various shapes can be adopted as long as the above requirements are satisfied. For example, a plate having a c-shaped cross section and a reverse c-shaped cross section as shown in the figure, or a plate in which both are opened in an eight-shape. It may be in the shape.

The first means is configured as follows. That is, a needle cover B that is fitted from the side to the distal end of the syringe A and covers the needle 13, the lower portion is a fitting portion 23 that is forcibly fitted to the distal end portion of the syringe body 11, and the upper portion is A needle-opening cylindrical portion 20 serving as a needle housing portion 24 for housing the needle 13 protruding from the syringe body 11, and a front opening of the needle housing portion 24 can be moved in and out by forcible pressing of the needle 13. closed by closing wall B ₂ having the insertion opening 30, the needle insertion opening 30, the inner bent portion 35 of the needle housing portion 24 the position of the closing wall B ₂ zigzag part 36 of the central portion is provided with longitudinal linear A rupture portion 32 was formed.

The second means is configured as follows. That is, in the first means, a plate-like blocking wall B ₂ formed separately is fixed to the base B ₁ having the ring-opening cylindrical portion 20.

The third means was configured as follows. That is, in the second means, the base B ₁ is provided with an open cylindrical portion 20 having an upper end closed and a lower end opening, and the flange 21 is at least laterally from the front opening edge of the open cylindrical portion 20. It was extended and configured.

  The fourth means is configured as follows. That is, in any one of the first to third means, the guide protrusions 22 projecting forward from both side edges of the front opening of the fitting part 23 are provided.

The eighth means is configured as follows. That is, the through first means at any of the means of the fourth means, the inner folding of the needle insertion openings 30 a, zigzag part 36 a closing wall B ₂ the central portion of the needle accommodating unit 24 positions provided by longitudinal A linear fracture portion 32 is formed in the curved portion 35.

  According to the present invention, the needle 13 can be covered from the side by being fitted from the side to the tip of the syringe A, and can also be removed from the side even when removed. Can be prevented. In addition, since the fitting portion 23 having elasticity is fitted by pressing against the syringe A from the side, the needle insertion port 30 is provided to force the needle 13 to be inserted and removed. Is also very easy.

To the substrate B ₁ having a ring-opened tubular portion 20, when configured by fixing the plate-like closing wall B ₂ formed separately from, the substrate B ₁ requires a relatively rigid, more flexible Therefore, the needle insertion port 30 that requires high performance can be made of a different material, and a more functional needle cover B can be formed.

When the base body B ₁ is provided with an open cylindrical portion 20 having an upper end closed and a lower end opening, and a flange 21 is extended at least laterally from the front opening edge of the open ring cylindrical portion 20, a needle When attaching / detaching the cover B to / from the syringe A, the flange 21 is pressed to enable easy attachment / detachment.

  When the guide protrusions 22 projecting forward from both side edges of the front opening of the fitting part 23 are provided, there is an advantage that the fitting part can smoothly be forcibly fitted to the tip of the syringe body 11. .

When the needle insertion slot 30, configured to the inner bent portion 35 of the zigzag part 36 a closing wall B ₂ the central portion of the needle accommodating unit 24 positions provided by longitudinal to form a linear fracture section 32, the needle Since a relatively strong force is required for the insertion of 13, it can be suitably used for the thick needle 13 or the like.

  Hereinafter, exemplary embodiments will be described embodiment of the present invention with reference to the drawings.

1 to 4 show a reference example, A is a syringe, and B is a needle cover.

  The syringe A includes a main body 11 having a small-diameter portion 10 at the tip, a needle 13 attached via a needle mounting member 12 screwed into the small-diameter portion 10 as shown in FIG. And a plunger 14 for pouring out the liquid in the main body 11 through the needle 13.

As shown in FIG. 2, the needle cover B includes a base body B ₁ and a closing wall B ₂ . The base B ₁ is made of a synthetic resin, and includes a ring-opening cylindrical portion 20, a flange 21, and a pair of guide protrusions 22 and 22. The ring-opening cylindrical portion 20 includes a lower large-diameter portion 20a and an upper concentric small-diameter portion 20b. The lower end is opened, the upper end is closed, and the front is coplanar. It is opened vertically. Further, the flange 21 extends laterally and upward from the front opening edge of the ring-opening cylindrical portion 20, and has a wide lower width. Further, each guide protrusion 22 protrudes forward from both side edges of the front opening of the fitting part 23. Each guide protrusion 22 has a c-shaped cross section and an inverted c-shaped cross section. The lower portion of the large diameter portion 20a is configured as the fitting portion 23, and the small diameter portion 20b is configured as the needle accommodating portion 24.

The closing wall B ₂ has a plate shape made of a synthetic resin, and closes the front opening of the needle accommodating portion 24 and is fixed to the surface of the flange 21. As a fixing method, appropriate means such as adhesion and fusion can be adopted. The blocking wall B ₂ includes a needle insertion port 30 that can be moved in and out by forcible pressing of the needle 13. The needle insertion port 30 in this example is configured as a slit 31 that cuts through the center of the needle housing portion 24.

  The needle cover B configured as described above is attached from the side of the syringe A. At that time, each guide projection 22 is expanded by the small diameter portion 10 of the syringe A, and thereby the fitting portion 23 is expanded and fitted to the small diameter portion 10. At the same time, the needle 13 presses the slit 31 and is accommodated in the needle accommodating portion 24. In this case, the syringe A can be held with one hand, the outer surface of the fitting portion 23 is sandwiched between the other hand, for example, the thumb and the index finger, and the flange 21 is pressed with these fingers, thereby enabling easy mounting. Further, when removing, for example, by holding the syringe body 11 with one hand and pressing the flanges 21 on both sides of the fitting portion 23 with its thumb and index finger, it can be easily removed. The attaching / detaching method is merely an example, and is not limited to this.

FIG. 5 shows another reference example. In the example of FIG. 1, the needle insertion port 30 is constituted by a linear breakable portion 32 that can be pressed and broken. The linear breakage portion 32 is provided by cutting the position of the needle housing portion 24 vertically. Specific examples of the line breakage portion 32 include perforations and an extremely thin line connection portion. In this case, when the needle cover B is first attached to the syringe A, the linear breakage portion 32 may be opened with a broken opening from the side. . Since other configurations are the same as those in the example of FIG. 1, the same reference numerals are given and description thereof is omitted.

FIG. 6 and FIG. 7 show still another reference example. In the example of FIG. 1, the blocking wall B ₂ is composed of a left blocking wall and a right blocking wall, and a needle insertion port 30 is formed. An overlapping portion 33 is formed by overlapping the edges of the left and right blocking walls. In this case, when the needle 13 is inserted, the overlapping portion 33 is passed between the overlapping portions 33 while being pressed and deformed inward or outward of the needle accommodating portion 24. Since other configurations are the same as those in the example of FIG. 1, the same reference numerals are given and description thereof is omitted.

8 and 9 show an embodiment of the present invention, in the example of FIG. 1, with two bent portions of the outer bent portion 34 and the inner bent portion 35 in the closing wall B ₂ zigzag A portion 36 is provided, and a linear break portion 32 similar to the example of FIG. 5 is formed in the inner bent portion 35 of the zigzag portion 36 to constitute the needle insertion port 30. The zigzag portion 36 is also provided by cutting the needle accommodating portion 24 vertically. In this case, the needle cover B may be attached to the syringe A from the first side as in the example of FIG. 5, but may be attached from above. Further, when the needle 13 is inserted from the first side, the needle 13 is introduced into the inner bent portion 35 while the zigzag portion 36 is pressed and deformed, and the linear fracture portion 32 is opened by breaking to open the needle accommodating portion 24. Inserted into. Since other configurations are the same as those in the example of FIG. 1, the same reference numerals are given and description thereof is omitted.

FIG. 10 to FIG. 12 show still another reference example, and shows an example in which the needle cover B is formed as an integral body with a synthetic resin. The needle cover B includes a lower large-diameter portion 20a and an upper concentric small-diameter portion 20b. The lower end is opened, the upper end is closed, and the front is vertically cut in the same plane. An opened ring-shaped cylindrical portion 20 is provided. In addition, a large number of elastic pieces 37 extending toward the center are arranged in parallel from both side edges of the front opening of the small diameter portion 20b, and the needle insertion port 30 is formed at the center. Further, a flange 25 is projected from the outer periphery of the fitting portion 23.

FIG. 13 shows still another reference example, and shows an example in which the shape of the elastic piece 37 is widened in the example of FIG.

It is a front view of the mounting state of the needle cover. ( Reference Example 1) It is a perspective view of a needle cover. ( Reference Example 1) It is sectional drawing which follows the XX line of FIG. ( Reference Example 1) It is sectional drawing which follows the YY line of FIG. ( Reference Example 1) It is a perspective view of a needle cover. ( Reference Example 2) It is a perspective view of a needle cover. ( Reference Example 3) It is a sectional view taken along the Y ₂ -Y ₂ line in FIG. ( Reference Example 3) It is a perspective view of a needle cover. (Example 1 ) It is a sectional view taken along the Y ₃ -Y ₃ line in FIG. 8. (Example 1 ) It is a longitudinal cross-sectional view of the mounting state of the needle cover. ( Reference Example 4 ) It is a perspective view of a needle cover. ( Reference Example 4 ) FIG. 12 is a cross-sectional view taken along line Y ₄ -Y ₄ of FIG. ( Reference Example 4 ) It is a perspective view of a needle cover. ( Reference Example 5 )

Explanation of symbols

A ... Syringe
10 ... small diameter part, 11 ... main body, 12 ... needle mounting part, 13 ... needle, 14 ... plunger B ... needle cover
B ₁ ... Base
20 ... Open ring cylindrical part, 20a ... Large diameter part, 20b ... Small diameter part, 21 ... Flange, 22 ... Guide protrusion,
23 ... Fitting part, 24 ... Needle housing part, 25 ... Flange
B ₂ … Blocking wall
30 ... Needle insertion port, 31 ... Slit, 32 ... Linear breakage part, 33 ... Overlapping part,
34 ... Outer bent part, 35 ... Inner bent part, 36 ... Zigzag part, 37 ... Elastic piece

Claims (4)

A needle cover ( B ) which is fitted from the side to the tip of the syringe ( A ) and covers the needle ( 13 ) , and the lower part is fitted to forcefully fit the tip of the syringe ( 11 ) part (23), and an upper, the syringe needle accommodating portion for accommodating a body (11) from projecting needle (13) (24) and the ring-opened tubular portion (20), the needle accommodating unit (24) The front opening of the needle is closed with a blocking wall ( B ₂ ) having a needle insertion port ( 30 ) that can be moved in and out by forcible pressing of the needle ( 13 ) , and the needle insertion port (30) 24) The closed wall (B ₂ ) at the position is characterized in that a linear fracture portion (32) is formed in the inner bent portion (35) of the zigzag portion (36) provided by longitudinally cutting the central portion. Syringe needle cover. The needle cover for a syringe according to claim 1, wherein a plate-like blocking wall ( B ₂ ) formed separately is fixed to a base body ( B ₁ ) having an open cylindrical portion ( 20 ) . Base (B ₁₎ is provided with a ring-opening cylindrical portion of the lower end opening (20) at the upper end closed, by extending the flange (21) to at least laterally from a front opening edge of the opening tubular portion (20) The needle cover of the syringe according to claim 2 configured as described above. The needle cover of the syringe according to any one of claims 1 to 3, wherein guide protrusions ( 22 ) projecting forward from both side edges of the front opening of the fitting part ( 23 ) are provided.

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