• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A non-reuseable syringe element has a syringe body (32) having a lower extremity closed by a base (34) provided with a cone (52) to receive a needle (44) and a shaft (42) terminated by a piston (36) sliding tightly in said syringe body. A resiliently flexible plate (60) having a diameter geater than the inner diameter of the syringe body and thus inducing through its curvature a weak frictional force enabling the displacement of the shaft in a first direction and a strong frictional force opposing displacement of the shaft in the other direction is mounted in the shaft. The direction of curvature of the washer can be inverted by directing the washer (60) into the groove (68). To avoid attempted re-use of the syringe element, a zone (66) of weak resistance to breakage by traction is provided on the shaft. This zone breaks under a traction lower than the strong frictional force, but greater than the weak frictional force. The plate (60) may either be mounted on the shaft and rest resiliently against the syringe body, or may be mounted on the syringe body and rest resiliently against the shaft. The syringe comprises a syringe barrel, one extremity of which is closed by a base (310) having a nozzle (312) pierced by a channel (314); a shaft terminated by a piston sliding inside the syringe barrel; and a hollow needle (308) having a base (324) and a conduit (326). This syringe also comprises fixing means for the needle onto the nozzle each composed of a tongue (328), furnished with a cavity (338) communicating with the channel (314), and an indentation (330). A tongue is provided on the outside face of the nozzle (312) and the indentation on the inside face of the base (324). Finally, the syringe has recesses (340) which destroy the seal when the tongues are removed.
    公开号:SU1780512A3
    申请号:SU894614679
    申请日:1989-07-05
    公开日:1992-12-07
    发明作者:Lui Pol Elgass
    申请人:Lui Pol Elgass；
    IPC主号:
    专利说明:

    The invention relates to a syringe and its elements, the piston of the syringe is automatically blocked at the end of the injection and has an inseparable needle.
    Known disposable syringe, which 5 contains a flexible elastic disk located on the rod in the housing of the syringe, which houses a piston sliding inside the housing, and a rod for moving the piston. It also contains a cover that closes 10: closes the syringe body and thus prevents the disc and piston from being removed from the body.
    The disk has an outer diameter exceeding the inner diameter of the case and is made with slots that give it some flexibility and allows it to be bent for installation in the case. It is also provided with protruding parts at its inner edge in order to provide 20 possibilities for gripping the stem. : 'A disadvantage of the known syringe is that it is necessary to carefully carry out machining of the disk for. obtaining protruding parts, the role of which is fundamental both for the value of the grip of the rod by the disk during normal use, and for the destruction of the rod in the event of an attempt to reuse the syringe. thirty
    In addition, the syringe is difficult to manufacture in practice, since the gasket must have two opposite properties: It must be flexible to create only. there is a slight friction counteraction in the 35 direction of stem sliding, but it must also be sufficiently rigid so that the protruding sections penetrate the rod in case of an attempt to reuse the syringe. .40, The aim of the invention is higher; one-time warranty and increased reliability.
    In FIG. 1 shows a longitudinal section of a syringe; in FIG. 2 - needle attachment with 45 ’; syringe barrel: in FIG. 3 is the same with another embodiment of a communication element; in FIG. 4 is a section AA in FIG. 2; in FIG. 5 is the same, an embodiment of the recess in the base of the needle; in FIG. 6 - protrusion of the tip; in FIG. 7 - the same, the second embodiment of the protrusion; in FIG. 8- the same, the third embodiment of the protrusion; FIG. 9 is a longitudinal section of a first embodiment of a syringe element: FIG. 10 - then 55, after taking the liquid; in FIG. 11 is the same after injection; in FIG. 12, too, with a section of weak strength between the gasket and the rod stop: in FIG. 13 - the same, locking element; in FIG. 14 is the same.
    the second embodiment of the locking element; in FIG. 15 is a section BB in FIG. 9; in FIG. 16 is a section BB in FIG. 10; in FIG. 17 is an embodiment of a syringe element 5 for a small volume; in FIG. 18 is the same, an enlarged view of the lower part of the syringe; in FIG.
    19-section GG nafig. 18; in FIG. 20-second version of the element of the syringe for a small volume; in FIG. 21 is an embodiment of a syringe element 10; in FIG. 22 - the same after taking the fluid; in FIG. 23 - the same after. injections; in FIG. 24 is a section DD in FIG. 21; in FIG. 25 is the same, an example of the execution of the body of the Syringe Element; in FIG. 26 15 section EE in FIG. 25; in FIG. 27 is an embodiment of a syringe element; in FIG. 28 section FJ in FIG. 27; in FIG. 29 - section
    3-3 in FIG. 27; in FIG. 30 - gasket; in FIG. 31 is a section 14-I in FIG. 30: in FIG.
    32-35 laying options.
    The syringe contains a syringe element and a hollow needle. The element of the syringe includes a cylinder 1, a piston 2, sliding in the cylinder 1 and connected WITH STOCK'S'Z, and a hollow needle 4.
    The cylinder 1 has a lower city, closed by a base 5, which is continued by a tip 6, in which the channel 7 is made. The tip 6 has the shape of a truncated cone, but it can also be cylindrical. Top open end of cylinder 1
    Equipped with supporting projections 8, which facilitate the injection process.
    The rod 3 ends at one end with a piston blocking element in the form of a 35 plate 9, and at the other end with a stop 10.
    The rod 3 is made with guide wings 11 for guiding the rod when it slides inside the cylinder 1.
    The needle 4 is made in the form of a tube 12 with 40 base 13. The base 13 has a conical cavity in the form of a truncated cone and provides a tight installation of the needle · 4 on the tip 6;
    The syringe is also provided with at least 45 one means of “fixing the needle and communication element.
    Means for fixing the needle is made in the form of a protrusion 14 on the outer surface of the tip 6 and a recess 15 on the inner 50 of the surface of the base 13, forming a socket for the protrusion 14.
    The fixation tool is designed to allow the needle to be fixed, rather than its separation. For this purpose, each protrusion 14 55 has a first end 16, which is made in the form of a surface inclined relative to the longitudinal axis of the cylinder in order to facilitate the connection of the base 13 of the needle with the tip 6. and the second end 17, which has a surface perpendicular to υ
    the longitudinal axis of the cylinder and interacting with the surface of the end 18 of the recess 15 to prevent the needle from detaching.
    Each protrusion 14 is made with a cavity 19, which communicates with the channel 7 of the tip 6. The communication tool is made in the form of a recess 20 on the outer surface of the tip 6 for connecting each cavity 21 of the recess 15 with the outer side of the cylinder 1.
    The shape of the protrusion 14 of the tip 6 and the shape of the recess 15 of the base 13 are selected so that tightness is ensured between the needle and the cylinder 1 of the syringe when the needle is in place, while the cavity 19 and the recess 20 are not connected.
    When trying to disconnect the needle, a leak occurs, which leads to the unsuitability of further use of the syringe.
    This happens as follows.
    It is not possible to remove the needle fixing means by removing the end 18 of each recess 15, since the needle is usually made of steel. Removing the fixing means therefore consists in removing the protrusions 14. made of plastic, for example using a razor blade. However, this removal creates a message between each cavity 21 of the recess 15 and the channel 7 through the cavity 19. Since the cavity 21 is connected to the outside of the syringe through the recess 20, the liquid contained in the syringe barrel is partially expelled during injection through the recesses 20. In addition to this ejection, the liquid creates pressure on the base. recess 15, which tends to separate the needle 4 from the cylinder 1. As a result, the syringe becomes unusable. The length of the recesses 15 can both significantly exceed the length of the protrusions 14, and be slightly larger.
    In FIG. 4, the recesses 15 have a width slightly exceeding the width of the protrusions 14. and in FIG. 5 recesses 15 are made in the form of an annular groove 22.
    In FIG. 6-8 show various forms of the protrusions 14.
    The first end 16 is in contact with the outer surface of the tip 6, while the second end 17 can be separated from it by the protrusions 23. The protrusion 23 gives more elasticity to the protrusion 14 and thus facilitates the connection of the base of the needle with the tip.
    All protrusions 14 have a cavity 19, which forms a hole in the tip. 6, when the protrusion 14 is removed.
    30512 6
    In this case, each cavity 21 of the recesses 15 communicates with the channel 7 and the tightness • is broken due to the recesses 20.
    The recesses 20 can be replaced by 5 holes 24 made in the base 13 of the needle.
    The syringe element comprises a housing in the form of a cylinder 1 with a base 5 attached to the lower end of the housing and connected 10 with a tip 2 and 6, a piston 2 with an elastic element 25, a rod 3, which is integral with the piston, and a piston blocking element. Stem 3 has a cruciform shape.
    The piston stroke blocking element is made in the form of a flexible elastic plate 9 with a hole 26 for the passage of the rod and grooves 27, which give it a certain flexibility. · '
    The rod 3 has flanges on both sides of the gasket 9. which are wider than the diameter of the hole 26 of the gasket ', which makes the latter one-piece with the rod.
    The diameter of the gasket 9 is somewhat larger than the internal diameter of the cylinder 1 and thus it becomes curved when it is installed inside the cylinder 1.
    The gasket 9 has a small friction force 30 when the rod 3 moves in directions that increase its curvature, and a significant friction force when the rod 3 moves in a direction that tends to decrease curvature. ’. '. Ί // .' U®. ''
    The part of the rod 3, which passes through the gasket 9, can form a section 28 of low strength. The low-strength section 28 can also be located in any other part of the rod, for example, Between the gasket'9 and the stop 10 (see, Fig. 12). The easiest way to make a site; low strength is to reduce the cross section of the rod. ''
    The fracture resistance demonstrated by this section is selected so that it is on. varies between a low friction force and a significant friction force.
    On the inner side surface of the cylinder 1 is made, a groove 29, which serves to enable reversal of the bending of the gasket 9 and for this purpose the groove has a diameter greater than the diameter of the non-bent gasket 9.
    The groove 29 may have a width sufficient to receive the gasket, as shown in FIG. 9, or have a very large width, as shown in FIG. 14.
    Ί
    On the other hand, this groove is not required in pre-filled syringes, since their use includes only the injection phase. Before use in a syringe of this kind, the piston is close to the top 5 of the cylinder end face and the gasket is curved so that its concave portion is opposite the stop 10 of the rod 3.
    To prevent the complete removal of the rod from the cylinder, sharp protrusions 30 are pressed in the last 10 (see Fig. 13), which form a locking element for blocking the piston stroke.
    Another embodiment of the locking element is shown in FIG. 14 is a housing 3, the open top end of which is worn on the cylinder 1 and is made in the form of a bell having an inner diameter of at least equal to the diameter of the gasket 9. The housing 31 is included in the bell for the formation of a groove 22 and locking means, making it impossible removing the gasket 9 from the cylinder. ''
    A syringe with an element is used as follows. 25
    The first stage is to draw fluid into the syringe, which must then be injected by moving the piston 2 to the base 5. When the gasket 9 reaches the groove 29, it takes a flat shape, as shown in Figure 30. 10. In this position, the rod 3 can be pulled out of the syringe or, on the contrary, moved back into the cylinder 1.
    It is desirable that the stem cannot be removed from the syringe by density, since 35 otherwise the user could remove the gasket and use the same syringe several times. '<. L · - ^ '······ The second stage consists in injecting liquid by moving the piston 40 to the base 5. As soon as the gasket leaves the groove 29, it bends in the direction shown in FIG. 11, and only after that the rod 3 can slide towards the base 5. 45
    In the case of using the locking element shown in FIG. 14, the gasket 9 approaches the housing 31 at the end of the intake phase. A significant width of the groove 29 provides for the displacement of air containing 50 gos in the syringe. by pushing the rod 3 towards the base 5, and then taking a drop of blood by pulling the rod 3 from the cylinder 1 again. Then the liquid is injected in the usual way by 55 pushing the piston 2 with the rod 3 into the cylinder 1 .. The double movement of the gasket 9 in the groove 29 allows by dropping. blood check the correct insertion of a needle into a blood vessel.
    The following are other examples of the implementation of the syringe, in particular, with other options for performing gaskets.
    The grooves 27 (in Fig. 32) are radial5 and a significant number of them; in FIG. 33 grooves 27 are made in a spiral shape; in FIG. 34 grooves form a wide recess that only thin tongues 32 leave; in FIG. 35, a gasket 9 is shown having 10 radial fingers 33, wherein the edge 34 of each finger has a geometry defined such that the entire edge 34 is in contact with the cylinder 1 of the syringe, which provides better sliding 15 of the rod in the cylinder.
    In addition, even in cases where the syringe body is cylindrical, the piston entry blocking element is not necessarily a plate. 20 It can consist of one or more flexible and elastic disks 35 and 36 (see Fig. 16), made in a perpendicular plane to the axis of the rod, and having a length slightly larger than the diameter of the body 25 of the syringe.
    This embodiment is interesting in that putting the disks 35 and 36 onto the rod 3 can be done by inserting the disks into the grooves provided in the rod.
    Consider an example of a syringe element for injecting small volumes of liquid (see FIGS. 17-19).
    The syringe element contains a housing in the form of a cylinder 1 with a base 5 and a tip 35 in which a channel 7 is made. It also contains a cylinder 37 located in the housing. The cylinder 37 is attached to the base 5 and forms an annular reservoir in the syringe body. A channel 38 is provided at the base of the cylinder 37 40 for communicating this. go tank's channel 7. '
    The rod 3 has a common cylindrical shape equipped with two annular seals 39 and 40 at its lower end, which 45 are placed respectively between the inner wall of the cylinder 1 and the outer wall of the rod 3 and between the outer wall of the cylinder 37 and the inner wall of the rod 3.
    The piston stroke blocking element s50 consists of four elastic-flexible disks 41, part of which is inserted into the inner wall of the rod 3, and the other part of which remains elastically on the cylinder 37.
    In the position shown in FIG. 18, 55, the gaskets of the disks 41 allow the rod to be pulled out from the cylinder 1. In order to then enable the rod to be pushed towards the base 5 of the cylinder 1, the curvature of the disks 41 needs to be reversed. the outer wall of the cylinder 37.
    Section 28 with low strength of the rod can be performed using a groove that will reduce the thickness of the rod wall.
    Another exemplary embodiment of a syringe element for injecting small volumes of liquid is shown in FIG. 20.
    This element of the syringe contains a housing consisting of two parts 42 and 43, fitted one into the other. Part 42 has a non-identical diameter along the entire length, i.e., contains a first zone of small diameter and a second zone of large diameter.
    The piston 2 always remains in the first zone of part 42, while the gasket 9 is then reconnected to form a syringe body.
    A syringe with this embodiment of its element is used as follows.
    In the initial position, the fingers 44 of the gasket 9 with their convex part face the base 5, and the piston 2 is located at the base 5. In this position, the rod 3 can only be moved in the direction
    S1. This movement corresponds to the intake of fluid for injection into the syringe body. The rod 3 is moved in this direction until the gasket 9 is at the level of the groove 29 provided for by '15 on the rod 3. When then the piston 2 begins to be pushed down to the base 5, the inner edge of the gasket 9 comes out of the groove 29 and rests elastically on rod 3, while in the second zone of part 43. As a result of this. the gasket 9 is bent toward the open; a syringe has been obtained for injecting small volumes of liquid, the piston blocking element of which remains effective, since the diameter of the gasket is large. The syringe is convenient for the user in handling due to the large diameter of the second PART ZONE. . .
    Until now, various examples of the execution of the syringe element have been described, in which the piston stroke blocking element • mounted on the rod 30 remains elastically pressed against the body wall.
    ’However, the invention can also be practiced by attaching the locking means to the body of the syringe and pressing it elastically against the stem;
    Syringe element : in this embodiment (see FIG. 21), the execution also comprises a cylinder. 1, the base 5 of which is connected with the tip 6, the piston 2, the rod 3 and ele:. the piston stroke blocking element in the form of an elastic flexible plate 9. The rod is made with a section 28 of low strength and is obtained by reducing the cross section of the rod.
    The gasket 9 contains an outer edge mounted on the stem 3, always remains the end of the housing (from the base 5). In this position, the stem 3 can no longer move in the direction S1, but can only slide in the direction S2.
    ; At the end of the injection, the piston 3 is near the base 5. The syringe then becomes unusable as. stock .. 1 3 cannot be moved towards
    S1. If, however, an attempt is made to use the syringe for the second time, then the rod 3 breaks at the height of section 29 with low strength, whereby any further use of the syringe becomes completely impossible.
    The blocking element may be flexible and elastic guides 47. evenly spaced around the stem 3 and radially located relatively nepokh These guides are installed in the desired position in the slots 48 made in the wall of part 45 of cylinder 1. .. The inner edge of each guide. '·. '47 is elastically pressed against stem 3, while. the outer edge, which is bent back, abuts against the outer surface of the cylinder fixed in the cylinder wall. 1 and 45 ra 1. The inner edge, elastically supported, The upper part 46 is put on the lower stem 3, while the gasket is bent into the nude part 45 and fixes guiding the side of the base 5. Through its inner 48.
    ’The edges elastically pressed against the stem are shown in FIG. 27 shows the mounting option of the masonry creates a frictional force that is 50 of the gasket 9. In this case, the cylinder 1 has an opposite direction to the movement of the rod in the direction S1, but allows the stem to slide in the direction S2.
    The gasket 9 (Fig. 24) has fingers 44 directed radially relative to the cylinder 55 of cylinder 1, part of which is elastically pressed against the rod 3.
    A simple way to fix the gasket is that it is placed between the two parts 45 and 46 of cylinder 1. which.
    the upper open end has two supporting surfaces 49 and 50, between which ‘gasket 9 is fixed. The gasket 9 can be made with fingers 51, and also have recesses 52 that allow the passage of the guide wings 11 of the rod 3.
    权利要求:
    Claims (13)
    [1]
    Claim
    1, a disposable syringe containing a syringe element and a hollow needle, wherein the syringe element includes a cylinder having an upper open end and a base closed by a base, connected to a tip, in which a channel is connected to the cylinder, and a piston with a rod, having the possibility of longitudinal movement in the cylinder and locking in it by means of the piston stroke blocking element, and the hollow needle is made in the form of a tube with a base, by means of which it is hermetically fixed on the tip, the channel of which It is connected with the channel of the needle, therefore, in order to increase the guarantee of one-time use, at least one means of fixing the needle is introduced into it, which is made respectively on the outer surface of the tip and on the inner surface of the base of the needle has a protrusion and a recess, the first of which is placed in the second and has a cavity connected to the channel of the tip, and also made on. of one of the parts to be joined, a coupling element by which the cavity of the recess has the ability to connect with the outside of the cylinder, while the base of the needle has the ability to be locked by a protrusion and recess.
    [2]
    2. The syringe according to claim 1, with the fact that the tip and base of the needle are made in the form of a truncated cone.
    [3]
    3. The syringe according to claims 1 and 2. On the basis of the fact that the notch of the means for fixing the needle is made in the form of an annular groove.
    [4]
    4. The syringe according to paragraphs. 1-3, I distinguish u and js in that the communication element is made on the outer surface of the tip in the form of a recess.
    [5]
    5. The syringe according to paragraphs. 1-3, from the list of topics. that the communication element is made in the form of a through hole in the base of the needle.
    [6]
    6. A syringe element comprising a hollow body having a top open end and a base three closed by a base, connected to a tip, in which a channel is connected to the body cavity, and a piston connected to the rod, having the possibility of longitudinal movement in the body and locking in it by means of an element blocking the piston stroke, made in the form of a plate placed on the rod, the transverse dimension of which is greater than the internal transverse dimension of the housing, which is curved towards the open end of the latter and has the ability bending toward the closed end to the fulfillment by the inner surface of the housing groove, characterized in that, in order to improve reliability, the plate is configured ^ a flexible elastic disk, rigidly fixed on the rod on which the low strength portion is formed.
    [7]
    7. The syringe element according to claim 6, which is related to the fact that the disk is placed between two flanges made on the rod, the diameter of which is larger than the diameter of the disk opening.
    [8]
    8. The element of the syringe according to paragraphs. 6 and 7, with the fact that the open end of the housing is equipped with a locking element for blocking the stroke of the piston.
    [9]
    9. A syringe element comprising a hollow body having a top open end and a base end closed by a base, connected to a tip, in which a channel is connected to the body cavity, and a piston connected to the rod, having the possibility of longitudinal movement in the body and locking in it by means of an element blocking the stroke of the piston, made in the form of a plate placed on the rod, the transverse dimension of which is greater than the internal transverse dimension of the housing, with the fact that. in order to increase reliability, the plate is made in the form of a flexible elastic disk rigidly fixed in the body, curved towards the closed end of the latter and having the ability to bend towards its open end by means of a groove made on the rod, while the rod has a portion of low strength.
    [10]
    10. The element of the syringe according to claim 9, with the exception of that. that the piston blocking element is fixed at the upper end of the housing. ‘. // / ''
    [11]
    11. The element of the syringe PP. 9 and 10, characterized in that the housing consists of interconnected upper and lower parts, between which the disk is placed.
    [12]
    12. The element of the syringe according to paragraphs. 9-11, distinguished by the fact that fingers are made on the inner surface of the disk elastically in contact with the stem.
    Priority on points:.
    11/06/87 by claims bi 7
    [13]
    11.17.87 by claims 1-5:
    12/23/87 according to paragraphs 9-12 04/29/88. according to claim 8.
    Fi g j
    A ~ A
    FIG
    Aa
    Fig 5
    Fi g. 6
    Fi g. 7
    Fig. &
    Fig-iz
    Fig 16
    Fig / Z
    Fig 21 srig.yy (Riga 23 .1780512
    FIG. 29th
    Figzg
    FIG. 3b
    Compiled by I. Kurdchenko Editor Tehred M. Morgenthal Corrector A. Motyl
    Order 4443 Circulation Subscription
    VNIIIPI of the State Committee for Inventions and Discoveries at the State Committee for Science and Technology
    113035, Moscow, Zh-35, Raushskaya nab .. 4/5
    Production and Publishing Plant Patent '', Uzhgorod, 101 Gagarin St.
    类似技术:
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    CN101232847A|2008-07-30|Needle insertion device
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    JP2019195721A|2019-11-14|Hub assembly with partition wall member
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    同族专利:
    公开号 | 公开日
    WO1989004187A3|1989-06-01|
    KR970006094B1|1997-04-23|
    DE3879678T2|1993-09-30|
    EP0341281B1|1993-03-24|
    US5037393A|1991-08-06|
    AT87219T|1993-04-15|
    JPH02502073A|1990-07-12|
    WO1989004187A2|1989-05-18|
    AU2622488A|1989-06-01|
    KR890701154A|1989-12-19|
    DE3879678D1|1993-04-29|
    EP0341281A1|1989-11-15|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH434187|1987-11-06|
    CH446087|1987-11-17|
    CH504887|1987-12-23|
    CH161088|1988-04-29|
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