JP2008104623A - Container-cum-syringe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make it possible to observe the state of medical liquid before injection well, and to surely prevent the medical liquid from projecting from an injection needle so as to inject the medical liquid to a human body at ease. <P>SOLUTION: The containr-cum-syringe 1 comprises: a cylinder 2 where a bypass path 2a is formed; front and rear stoppers 5a and 5b fitted to a rear chamber 2c on the rear side of the bypass path 2a for liquid-tightly sealing the medical liquid m filled in the rear chamber 2c; a cylinder tip 3 provided with a lure point 3a and fitted to the front end of the cylinder 2; a finger grip 4 fitted to the rear end of the cylinder 2; and a plunger rod 6 connected to the rear stopper 5b. The length L of the bypass path 2a is longer than the front stopper 5a, the length L2 of a front chamber 2b is set longer than the mutual distance L3 of the front and rear stoppers 5a and 5b in the rear chamber 2c, and a medical liquid guiding member 9 for mitigating the flow of the medical liquid m from the front chamber 2b to the distal end side of the lure point 3 and making it pass through is mounted inside the through-hole 3f of the lure point 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a container-use syringe in which a drug solution guiding member is provided inside a lure at the end of a cylinder fitted to the tip of a cylinder.

Conventionally, a cylinder, a front stopper and a rear stopper, which are fitted on the front and rear end sides of the cylinder and seal the chemical liquid filled in the cylinder, and a front stopper A cylinder chamber provided with a bypass chamber into which the needle enters and a luer tip for attaching a syringe needle at the tip thereof, a finger grip fitted to the rear end of the cylinder, and inserted into the cylinder from the rear end of the cylinder A plunger rod connected to the rear stopper, and when in use, the rear stopper is pushed by the plunger rod and the front stopper is pushed forward together with the chemical solution. By entering the inside, the liquid medicine sealed between the front and rear stoppers The seal on the tip side is released and the gas flows out from the cylinder into the bypass chamber, flows through the gap between the front stopper and the bypass chamber, and is guided to the inner surface of the lure tip along the bypass groove provided on the inner wall of the bypass chamber. A container-use syringe that is introduced into a syringe needle is known (see, for example, Patent Document 1 and Patent Document 2).
Japanese Examined Patent Publication No. 62-58745 Japanese Patent Laid-Open No. 8-148101

  However, in the container / syringe, the unsealed drug solution flows into the bypass chamber from the cylinder, and is narrow between the outer peripheral surface of the front stopper that has previously entered the bypass chamber and the bypass groove. Since it is guided to the injection needle through the gap, there is a problem that the state immediately before the injection of the liquid medicine injected into the human body cannot be seen well including bubbles.

  The present invention has been made in view of the above circumstances. It is possible to observe well the state of the drug solution before injection and to reliably prevent the drug solution from protruding from the injection needle. It is an object of the present invention to provide a container-use syringe that can inject a medical solution into a human body.

The present invention is characterized by the following points in order to solve the above problems.
That is, the container-use syringe according to claim 1 is made of a transparent material, and has a cylinder formed with a bypass passage formed by bulging the cylinder wall outward in an axial intermediate portion, and a cylinder on the rear side of the bypass passage. The front and rear stoppers are fitted in the rear chamber with a gap in the axial direction and the liquid medicine filled in the rear chamber is sealed in a liquid-tight manner. A cylinder tip having a base end fitted to the outer periphery of the front end of the cylinder, a finger grip provided on the outer periphery of the rear end of the cylinder, and the rear portion inserted into the cylinder from the rear end of the cylinder A container-use syringe including a plunger rod connected to a stopper, wherein the length of the bypass path of the cylinder is set to be longer than the axial length of the front stopper. The length of the front chamber of the cylinder on the front side of the bypass path is set to be longer than the distance between the front stopper and the rear stopper separated by the chemical solution in the rear chamber of the cylinder. The through hole formed in the cylinder and communicating with the cylinder is located on the cylinder side, and the chemical solution introduced into the through hole from the inside of the cylinder is refracted from the direction intersecting the axis of the hole to the direction along the axis. A chemical solution guide member provided with a chemical solution guide path is attached.

  Further, the container-use syringe according to claim 2 is the container-use syringe according to claim 1, wherein the bottom of the fitting hole into which the cylinder at the end of the tube is fitted is connected to the through hole and has a larger diameter. A concave portion is formed, and the chemical solution guide member is provided at a shaft portion fitted in the through hole and a base end portion on the cylinder side of the shaft portion and is immersed in the concave portion, and has a larger diameter than the through hole. A flange that is formed to have a smaller diameter than the outer diameter of the recess and that forms an annular gap with the recess, an introduction groove that is provided on the bottom surface of the recess in the radial direction of the through hole, and the shaft portion And a chemical solution guide path which is formed along the axial direction and includes a flow groove having one end connected to the introduction groove and the other end opened to the tip of the shaft portion. .

Moreover, the container combined syringe which concerns on Claim 3 is a container combined syringe of Claim 2,
The luer tip through hole is formed in a tapered hole having a large diameter on the fitting hole side and a small diameter on the tip side of the luer tip, and an annular groove is provided along the circumferential direction at a position near the fitting hole side. A taper that matches the tapered hole of the through hole is provided on the outer periphery of the shaft portion of the chemical liquid guiding member, and an annular protrusion that fits in the annular groove of the through hole is provided along the circumferential direction. It is characterized by being.

  The container-use syringe according to claim 4 is the container-use injector according to claim 2 or 3, wherein an insoluble substance in the drug solution is present at the end of the annular gap between the recess and the flange on the cylinder side. It is characterized in that a filter that prevents entry into the annular gap is provided.

  Further, the container-use syringe according to claim 5 is the container-use injector according to claim 4, wherein a plurality of small holes for communicating the inside of the cylinder with the annular gap are provided at the end of the flange on the cylinder side. A flange plate arranged at intervals in the direction is provided so that its outer peripheral portion is in close contact with the bottom portion of the fitting hole, and the filter is mounted on the flange plate so as to cover the small hole. It is characterized by.

The present invention has the following excellent effects.
According to the container-combined syringe of claim 1, the chemical solution whose front seal has been released by the front stopper being pushed into the position of the bypass path of the cylinder is transferred from the rear chamber of the cylinder behind the bypass path to the bypass path. Since the entire amount enters the front chamber of the cylinder on the front side of the bypass passage, the state of the liquid medicine before injection, which is difficult to see in the cylinder tip of the conventional syringe serving as a container, in the front chamber of the cylinder, including bubbles, is a transparent cylinder. The air bubbles remaining in the front chamber can be completely discharged to the outside through the injection needle in the same manner as a general syringe, and the drug solution can be safely injected into the human body.
Further, as described above, when the front stopper is pushed into the position of the bypass path of the cylinder, when the chemical solution whose front side is released passes through the bypass path and enters the front chamber, it passes through the narrow passage of the bypass path. The chemical solution tries to flow into the through hole of the lure tip from the front chamber at once, but the chemical solution guide path of the chemical solution guide member effectively relaxes the flow of the chemical solution in the through hole, so that the chemical solution from the tip of the injection needle The water gun phenomenon that protrudes can be reliably prevented.

  Further, according to the syringe for both containers according to claim 2, the drug solution guiding groove refracted by the introduction groove and the flow channel can be easily formed in the drug solution guiding member, and the flow of the drug solution in the through hole of the luer tip Can be mitigated accurately.

  According to the container-use syringe according to claim 3, the medicinal solution guiding member can be assembled by inserting the shaft portion into the through-hole of the luer tip easily, and the annular protrusion of the shaft portion and the through-hole. The chemical liquid guiding member can be firmly held in the through hole by fitting with the annular groove.

  Moreover, according to the syringe for both containers according to claim 4, when the freeze-dried preparation is dissolved in the liquid solution and injected in the two-chamber container-use syringe, the dry preparation should be in the liquid medicine in the cylinder. Even if insoluble matter is generated, the insoluble matter is filtered by the filter when the chemical solution enters the through-hole of the lure tip from the inside of the cylinder, so that the insoluble matter is injected into the human body from the injection needle through the through-hole. Can be surely prevented.

  In addition, according to the syringe for both containers according to the fifth aspect, the filter can be easily installed in a stable and stable state by the flange plate at the inlet portion where the chemical solution enters from the inside of the cylinder into the through-hole of the luer tip.

Hereinafter, a container-use syringe according to an embodiment of the present invention will be described with reference to the accompanying drawings.
In FIG. 1, reference numeral 1 denotes a container-use syringe according to an embodiment of the present invention. The container-use syringe 1 is fitted to a cylinder 2, a cylinder tip 3 fitted to the outer periphery of the front end (left end in FIG. 1) of the cylinder 2, and an outer periphery of the rear end (right end of FIG. 1) of the cylinder 2. The finger grip 4 made of synthetic resin and the chemical liquid m filled in the cylinder 2 are sealed between each other, and is provided in the cylinder 2 so as to be reciprocated by being inserted into the cylinder 2 with an interval in the axial direction. Front stopper 5a and rear stopper 5b, and a plunger rod which is inserted into the cylinder 2 from the rear end thereof, the front end portion is connected to the rear stopper 5b, and the rear stopper 5b is reciprocated in the axial direction of the cylinder 2. 6, an injection needle 7 attached to a luer tip 3 a provided at the tip of the tube tip 3, and a protector 8 that covers the injection needle 7.

  The cylinder 2 is made of a transparent glass cylinder, and is provided with one bypass passage 2a formed by bulging a part of the cylinder wall in the middle portion slightly closer to the front than the center in the axial direction. The front side (left side in FIG. 1) of the bypass path 2a is a front chamber 2b, and the rear side (right side in FIG. 1) of the bypass path 2a is a rear chamber 2c, both of which have the same inner diameter. The length L of the passage 2a1 in the axial direction of the cylinder 2 of the bypass passage 2a is longer than the axial length (thickness) L1 of the front stopper 5a, for example, 1.3 times the axial length of the front stopper 5a. It is set to 1.7 times.

The front and rear stoppers 5a and 5b each have an outer diameter slightly larger than the inner diameter of the cylinder 2, and are formed of an elastic material made of a material such as rubber for medical drugs. 5a is positioned slightly rearward from the rear end of the bypass passage 2a in the rear chamber 2c, and the rear stopper 5b is spaced rearward from the front stopper 5a so as to be within the rear chamber 2c of the cylinder 2 between them. It is positioned at a position where it can be filled with a volume of chemical solution m, and is inserted into the rear chamber 2c, and the chemical solution m filled in the rear chamber 2c is sealed.
The volume of the front chamber 2b of the cylinder 2 is slightly larger than the volume of the chemical solution m filled between the front and rear stoppers 5a and 5b in the rear chamber 2c. The axial length (length) L2 is set to be longer than the distance L3 between the rear stoppers 5a and 5b before being separated by the chemical solution m in the rear chamber 2c.

The tube tip 3 is formed by molding with a transparent synthetic resin material, and has a cylindrical base end portion 3b closed at the front side, the luer tip 3a coupled to the front end of the base end portion 3b, and the lure A luer lock portion 3c that is coupled to the front end of the base end portion 3b with a space outside the tip 3a. The fitting hole 3d formed inside the base end portion 3b has a front end at the bottom 3e. By inserting the cylinder 2 until it comes into contact, the tube tip 3 is liquid-tightly fitted to the front end portion of the cylinder 2. The luer tip 3a is provided with a through hole 3f that penetrates forward and backward on its axis and opens the inner end side to the bottom 3e of the fitting hole 3d and communicates with the front chamber 2b of the cylinder 2. .
The luer lock portion 3c is provided with a lock screw 3g for locking the base of the injection needle 7 and an annular groove 3h for locking the protector 8. The tube tip 3 may be formed as a tube tip not provided with the luer lock portion 3c.

  The through-hole 3f of the luer tip 3a is formed as a gently inclined taper hole having a large diameter on the fitting hole 3d side and a small diameter on the tip side of the luer tip 3a, and on the fitting hole 3d side. An annular groove 3j having a circular cross section along the circumferential direction is provided at a position close to the center of the cylinder 2 and the bottom 3e of the fitting hole 3d has a diameter larger than that of the through hole 3f. A circular recess 3k having a smaller diameter than the inner diameter is formed. In the through hole 3f, a chemical solution from the front chamber 2b of the cylinder 2 to the distal end side of the luer tip 3a is located closer to the fitting hole 3d side than the center (located on the cylinder 2 side). A chemical liquid guiding member 9 that allows the flow of m to pass through is attached.

As shown in FIGS. 2 to 5, the chemical liquid guiding member 9 is provided with a shaft portion 10 provided with a taper that matches the tapered hole of the through hole 3 f on the outer peripheral portion and fitted into the through hole 3 f, and the shaft A flange 11 is provided integrally with the base end portion of the portion 10 on the cylinder 2 side, and has a diameter larger than the through hole 3f and smaller than the outer diameter of the recess 3k of the tube tip 3.
On the outer periphery of the shaft portion 10, a flow groove 10 a formed along the axial direction of the shaft portion 10 and having the tip (the other end) opened at the tip of the shaft portion 10 is spaced in the circumferential direction of the shaft portion 10. A plurality of (four in the illustrated example) are provided, and an annular protrusion 10b that fits in the annular groove 3j of the through hole 3f at a position slightly closer to the flange 11 side than the center in the axial direction. Are provided along the circumferential direction.

The flange 11 includes a large-diameter outer flange portion 11a and a small-diameter inner flange portion 11b. The inner flange portion 11b is integrally coupled to a base end portion of the shaft portion 10, and the inner flange portion 11b. Are formed in the radial direction of the shaft portion 10 (through hole 3f) and have a plurality (four in the illustrated example) of introduction grooves 11c connected to the base end (one end) of the flow groove 10a. The inner flange portion 11b is provided at intervals in the circumferential direction.
And when the said shaft part 10 is mounted | worn with the through-hole 3f of the said cylinder tip 3, the protrusion 10b of the shaft part 10 is fitted by the annular groove 3j of the through-hole 3f, and the said flange 11 is the inner flange 11b. The end surface of the recess 3k is brought into contact with the bottom surface of the recess 3k to be immersed in the recess 3k, an annular gap e is formed between the inner peripheral wall of the recess 3k, and the annular groove e is formed on the bottom surface of the recess 3k. It is connected to the flow groove 10a of the shaft portion 10 through the introduction groove 11c of the inner flange portion 11b on the side. The flow groove 10a and the introduction groove 11c allow the chemical solution m to pass through the cylinder 2 through the annular gap e and be refracted from the direction perpendicular to the axis of the through hole 3f to the direction along the axis. A guiding path 9a is configured.

  A ring-shaped protrusion 2d is provided on the outer peripheral portion of the front end of the cylinder 2, and the protrusion 2d is fitted into a ring-shaped groove 3i formed at the front end of the fitting hole 3d of the tube tip 3. As a result, the cylinder tip 3 is fitted in a gas-tight and liquid-tight manner to the front end portion of the cylinder 2, and similarly, a ring-shaped protrusion 2e is provided on the outer peripheral portion of the rear end of the cylinder 2, and the protrusion 2e is The finger grip 4 is fitted into a ring-shaped groove 4 b formed in the cylindrical hole 4 a of the finger grip 4 and is firmly fitted to the outer peripheral portion of the rear end of the cylinder 2. The finger grip 4 may be formed integrally with the cylinder 2 instead of being fitted to the cylinder 2.

Next, the operation of the container / use syringe 1 according to one embodiment of the present invention will be described with reference to FIG.
In the case of the container / syringe 1 having the above-described configuration, when the container / syringe 1 is used, first, the plunger rod 6 is slowly pushed from the state shown in FIG. 1 through the rear stopper 5b as shown in FIG. 6 (a). Then, the chemical solution m in the rear chamber 2 c is sent to the front side of the cylinder 2 to push the front stopper 5 a into the bypass path 2 a of the cylinder 2. At this time, since the front seal of the chemical solution m by the front stopper 5a is released, the chemical solution m flows into the front chamber 2b on the front side of the front stopper 5a through the passage 2a1 inside the bypass passage 2a. Become. The front stopper 5a that has moved to the position of the bypass passage 2a is stopped at the position of the bypass passage 2a by the frictional resistance with the inner wall of the cylinder 2 without moving forward with the flow pressure of the chemical solution m.

  Further, as shown in FIG. 6 (b), by pushing the plunger rod 6, the chemical solution m on the front side of the rear stopper 5b sequentially flows through the passage 2a1 of the bypass passage 2a to the front of the front stopper 5a. Then, it moves into the front chamber 2b on the front side of the bypass passage 2a. Here, the rear stopper 5b comes into contact with the rear end surface of the front stopper 5a, and the chemical solution m is completely moved into the front chamber 2b. The user sufficiently observes the chemical solution m moved to the front chamber 2b from the outer peripheral side of the front chamber 2b of the cylinder 2, and confirms whether there is an abnormality in the chemical solution m including bubbles.

  When the front stopper 5b is pushed into the position of the bypass passage 2a of the cylinder 2 as described above, the chemical solution m whose front seal is released enters the front chamber 2b through the bypass passage 2a. The chemical solution m that has passed through the narrow passage 2a1 of the passage 2a tries to flow into the through hole 3f of the lure tip 3a from the front chamber 2b at once. The chemical solution guide member 9 is mounted on the inlet side of the through hole 3f. Since the bent chemical solution guide path 9a composed of the introduction groove 11c and the flow groove 10a effectively relaxes the flow of the chemical solution m in the through hole 3f, the water gun which the chemical solution m protrudes from the tip of the injection needle 7 is provided. The phenomenon is reliably prevented.

  Thereafter, as shown in FIG. 6 (c), the protector 8 covered with the injection needle 7 is removed from the tube tip 3, and if there are bubbles remaining on the upper part of the drug solution m, the plunger rod 6 is appropriately operated. As a result, the bubbles are discharged through the injection needle 7 from the through hole 3f of the luer tip 3a. After completely removing bubbles from the cylinder 2, as shown in FIG. 6 (d), the plunger rod 6 is further pushed so that the front stopper 5a passes through the rear stopper 5b and the front end (cylinder tip 3). The injection is performed by advancing to the bottom 3e) of the fitting hole 3d.

  As described above, in the syringe 1 for both containers, when the drug solution m in the rear chamber 2c of the cylinder 2 moves to the front chamber 2b of the cylinder 2 through the passage 2a1 of the bypass passage 2a of the cylinder 2, the bypass passage 2a Immediately jumping into the front chamber 2b through the narrow passage 2a1 and preventing the water gun phenomenon protruding from the tip of the injection needle 7, while the front chamber 2b immediately before injection, including the bubbles of the drug solution m, Presence / absence can be firmly observed from the outer peripheral side of the transparent cylinder 2, and it is possible to perform the injection with peace of mind after confirming that there is no abnormality in the drug solution m.

  As explained above, the container-use syringe 1 according to the above embodiment is made of a transparent material, and the cylinder 2 in which the bypass passage 2a formed by bulging the cylinder wall outward is formed in the intermediate portion in the axial direction; A front portion that is fitted into the rear chamber 2c of the cylinder 2 on the rear side of the bypass passage 2a with a space in the axial direction thereof, and seals the liquid medicine m filled in the rear chamber 2c in a liquid-tight manner. A stopper 5a, a rear stopper 5b, a luer tip 3a for attaching the injection needle 7 to the tip, and a tube tip 3 fitted with a base end 3b on the outer peripheral portion of the front end of the cylinder 2 through a fitting hole 3d; A finger grip 4 fitted to the outer peripheral portion of the rear end of the cylinder 2 and a plunger rod 6 inserted into the cylinder 2 from the rear end portion of the cylinder 2 and connected to the rear stopper 5b. Preparation The length L of the bypass path 2a of the cylinder 2 is set longer than the axial length L1 of the front stopper 5a, and the length L2 of the front chamber 2b of the cylinder 2 on the front side of the bypass path 2a 2 is set longer than the distance L3 between the front stopper 5a and the rear stopper 5b separated by the chemical solution in the rear chamber 2c, and is formed in the luer tip 3a of the cylinder tip 3 so as to be the front chamber of the cylinder 2. Refracted in the direction along the axis from the direction intersecting the axis of the through hole 3f of the chemical solution m introduced from the cylinder 2 into the through hole 3f in the through hole 3f communicating with 2b. The chemical liquid guiding member 9 provided with the chemical liquid guiding path 9a that is allowed to pass therethrough is mounted.

  Therefore, according to the container / syringe 1 according to the above embodiment, the front side stopper 5a is pushed into the position of the bypass path 2a of the cylinder 2 so that the medicinal solution m whose front side is released from the bypass path 2a. Since the entire amount enters the front chamber 2b of the cylinder 2 on the front side of the bypass passage 2a from the rear chamber 2c of the rear cylinder 2 through the bypass passage 2a, the conventional container-combined syringe is placed in the front chamber 2b of the cylinder 2. The state of the drug solution before injection, which was difficult to see at the tip of the cylinder, can be well observed from the outside of the front chamber 2b of the transparent cylinder 2, including air bubbles, and the drug solution can be injected into the human body with peace of mind.

  In addition, the tube tip 3 fitted to the front end of the cylinder 2 is not provided with a bypass chamber having a bypass groove unlike the tube tip of the conventional syringe serving as a container. The chemical solution m moves from the rear chamber 2c through the passage 2a1 to the front chamber 2b. Therefore, when the plunger rod 6 is pushed, the chemical solution m on the front side of the rear stopper 5b tends to flow through the passage 2a1 of the bypass passage 2a into the through hole 3f of the luer tip 3a. Since the chemical liquid guiding path 9a of the chemical liquid guiding member 9 effectively relaxes the flow of the chemical liquid m in the hole 3f, the water gun phenomenon in which the chemical liquid m protrudes from the tip of the injection needle 7 can be reliably prevented.

  Further, according to the container combined syringe 1 according to the above embodiment, the bottom 3e of the fitting hole 3d into which the cylinder 2 of the tube tip 3 is fitted communicates with the through hole 3f and has a larger diameter recess 3k. The chemical solution guide member 9 is provided in the shaft portion 10 fitted in the through hole 3f and the base end portion of the shaft portion 10 on the cylinder 2 side, and is immersed in the recess portion 3k. A flange 11 having a diameter larger than that of the hole 3f and smaller than an outer diameter of the recess 3k and forming an annular gap e between the recess 3k, and a through hole 3f on the bottom surface side of the recess 3k of the flange 11 is formed. An introduction groove 11c provided in the radial direction and a flow groove formed on the outer periphery of the shaft portion 10 along the axial direction, having one end connected to the introduction groove 11c and the other end opened to the tip of the shaft portion 10. And a chemical solution guide path 9a composed of 10a. Therefore, the chemical liquid guiding path 9a refracted by the introduction groove 11c and the flow groove 10a can be easily formed in the chemical liquid guiding member 9, and the flow of the chemical liquid in the through hole 3f of the luer tip 3a can be moderately relaxed. can do.

  Further, according to the container combined syringe 1 according to the above embodiment, the through hole 3f of the luer tip 3a is formed in a tapered hole having a large diameter on the fitting hole 3d side and a small diameter on the tip side of the luer tip 3a. An annular groove 3j is provided along the circumferential direction at a position closer to the fitting hole 3d side, and a taper that matches the tapered hole of the through hole 3f is provided on the outer periphery of the shaft portion 10 of the chemical solution guide member 9. In addition, since the annular protrusion 10b that fits in the annular groove 3j of the through hole 3f is provided along the circumferential direction, the chemical solution guide member 9 is placed in the through hole 3f of the luer tip 3a. The shaft portion 10 can be easily inserted and assembled, and the chemical liquid guide member 9 is inserted into the through hole 3f by fitting the annular protrusion 10b of the shaft portion 10 with the annular groove 3j of the through hole 3f. It can be securely held inside.

  In the container combined syringe 1 according to the above embodiment, the drug solution guide member 9 is provided with four drug solution guide paths 9a at intervals in the circumferential direction. The number of the drug solution guide paths 9a is as follows. The present invention is not limited to this, and a plurality other than one or four may be provided. Further, the chemical liquid guiding path 9a is perpendicular to the axis of the chemical liquid guiding member 9 (through hole 3f) by the flow groove 10a and the introducing groove 11c provided in the outer periphery of the shaft portion 10 of the chemical liquid guiding member 9 and the inner flange portion 11b. Although it was configured to intersect, the present invention is not limited thereto, and a through hole formed in the shaft portion 10 in the axial direction, and an introduction hole provided in the flange 11 so as to communicate perpendicularly to the through hole. You may comprise. Furthermore, the introduction groove 11c and the introduction hole do not have to intersect each other perpendicularly to the axis of the chemical liquid guiding member 9 (through hole 3f), and may be inclined and intersect. Further, since the through hole 3f of the tube tip 3 and the shaft portion 10 of the chemical liquid guiding member 9 are formed as a tapered hole and a tapered shaft, respectively, the shaft portion 10 can be easily inserted and fitted into the through hole 3f during assembly. However, the through hole 3f and the shaft portion 10 may be formed as a parallel hole and a parallel axis, respectively.

In addition, in the container combined use syringe 1 which concerns on the said embodiment, although the example which applied this invention to the single chamber type container combined use syringe was shown, this invention is not limited to this but is applied also to the two chamber type container combined use syringe. can do. In this case, since the volume in the cylinder 2 on the front side of the bypass passage 2a needs to be equal to or more than the total volume of the medicines in the two chambers in the cylinder, the total length of the syringe serving as a container is somewhat longer. .
Further, in this case, as shown in FIGS. 7 to 10, the chemical solution guide member 9 is formed on the outer end portion (end portion on the cylinder 2 side) of the outer flange portion 11 a of the flange 11. A circular flange plate 11d having a diameter larger than the inner diameter is integrally provided, and a plurality of small holes 11e communicating the inside of the cylinder 2 with the annular gap e are spaced in the flange plate 11d in the circumferential direction of the flange plate 11d. It is arranged with a gap. Then, the flange plate 11d is attached to the inner surface (recess 3k side) with a mesh-like filter 12 formed in an annular shape so as to cover the small hole 11e, and the outer periphery thereof is attached to the flange plate 11d. It is provided to be in close contact with the bottom 3e of the hole 3d through the filter 12.
In addition, the inner surface side of the flange plate 11d is formed on an inclined surface that matches the inclined surface of the bottom portion 3e of the mounting hole 3d.

According to this configuration, when a lyophilized preparation is dissolved in a solution and injected in a two-chamber type syringe, an insoluble matter of the dry preparation is generated in the drug solution m in the cylinder 2. However, the insoluble matter is prevented from entering the annular gap e by being filtered by the filter 12 when the chemical solution m enters the through hole 3f of the luer tip 3a from within the cylinder 2. It is possible to reliably prevent the insoluble matter from being injected into the human body from the injection needle 7 through the through hole 3f of the luer tip 3a.
Further, the filter 12 is mounted on the inner surface of the flange plate 11d. However, the filter 12 may be mounted on the outer surface side of the flange plate 11d. The filter 12 can be easily installed in a stable and stable state at the entrance where the chemical solution m enters the through hole 3f of 3a. However, the present invention is not limited thereto, and the filter 12 may be provided directly on the outer end surface of the outer flange 11a and the bottom 3e of the mounting hole 3d by bonding or the like so as to cover the annular gap e.

It is a longitudinal cross-sectional view which shows the container combined use syringe which concerns on one embodiment of this invention. It is the longitudinal cross-sectional view of the cylinder tip of a syringe used also as a container. It is a perspective view which similarly shows the chemical | medical solution guide member provided in a cylinder tip. It is a side view of a chemical | medical solution guide member similarly. FIG. 5 is a view taken in the direction of arrow A in FIG. 4. It is a longitudinal cross-sectional view which shows the effect | action of the container combined use syringe which concerns on one embodiment of this invention. It is a longitudinal cross-sectional view which shows the cylinder tip in the syringe with a container which concerns on other embodiment of this invention. It is a perspective view which similarly shows the chemical | medical solution guide member provided in a cylinder tip. It is a side view of a chemical | medical solution guide member similarly. FIG. 10 is a view in the direction of arrow B in FIG. 9.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Syringe and syringe 2 Cylinder 2a Bypass path 2b Front chamber 2c Rear chamber 3 Tube tip 3a Luer tip 3b Base end portion 3d Insertion hole 3f Through-hole 3j Annular groove 4 Finger grip 5a, 5b Front, rear stopper 6 Plunger rod 7 Injection Needle 8 Protector 9 Chemical liquid guiding member 9a Chemical liquid guiding path 10 Shaft portion 10a Flow groove 10b Projection 11 Flange 11c Introduction groove 11d Flange plate 12 Filter L Length of bypass path L1 Length of front stopper (shaft length)
L2 Length of front chamber L3 Distance between front and rear stoppers m Chemical solution

Claims (5)

A cylinder made of a transparent material and having a bypass passage formed by bulging the cylinder wall outward in an axially intermediate portion, and an axial space in the rear chamber of the cylinder on the rear side of the bypass passage A front stopper and a rear stopper for sealing the liquid medicine inserted and filled in the rear chamber in a liquid-tight manner, and a luer tip for attaching an injection needle to the tip are provided, and a base end is an outer periphery of the front end of the cylinder And a finger grip provided on the outer periphery of the rear end of the cylinder, and a plunger rod inserted into the cylinder from the rear end of the cylinder and connected to the rear stopper. A container combined syringe,
The length of the bypass path of the cylinder is set longer than the axial length of the front stopper, and the length of the front chamber of the cylinder on the front side of the bypass path is separated by a chemical in the rear chamber of the cylinder The through hole that is set longer than the distance between the front stopper and the rear stopper and that is formed in the luer tip of the cylinder tip and communicates with the cylinder is located on the cylinder side and introduced into the through hole from within the cylinder. A container-use syringe equipped with a medicinal solution guiding member provided with a medicinal solution guiding path for allowing the medicinal solution to be refracted from the direction intersecting the axis of the hole to the direction along the axis and passing therethrough.   At the bottom of the fitting hole into which the cylinder at the cylinder tip is fitted, a recess having a larger diameter communicating with the through-hole is formed, and the chemical solution guide member has a shaft portion fitted into the through-hole, A flange that is provided at a base end portion of the shaft portion on the cylinder side, is immersed in the recess, has a diameter larger than the through hole and smaller than an outer diameter of the recess, and forms an annular gap with the recess And an introduction groove provided on the bottom surface side of the concave portion of the flange toward the radial direction of the through hole and an outer periphery of the shaft portion along the axial direction, one end being connected to the introduction groove and the other end being the 2. The container-use syringe according to claim 1, further comprising a drug solution guide path configured by a flow groove opened at a tip of the shaft portion.   The luer tip through hole is formed in a tapered hole having a large diameter on the fitting hole side and a small diameter on the tip side of the luer tip, and an annular groove is provided along the circumferential direction at a position near the fitting hole side. A taper that matches the tapered hole of the through hole is provided on the outer periphery of the shaft portion of the chemical liquid guiding member, and an annular protrusion that fits in the annular groove of the through hole is provided along the circumferential direction. The container-use syringe according to claim 2, wherein the syringe is used as a container.   4. The filter according to claim 2 or 3, wherein a filter for preventing an insoluble matter in the chemical solution from entering the annular gap is provided at an end of the annular gap between the recess and the flange. The container combined use syringe described.   At the end of the flange on the cylinder side, there is a flange plate in which a plurality of small holes communicating with the annular gap in the cylinder are arranged at intervals in the circumferential direction, and the outer peripheral portion thereof is the bottom of the fitting hole. The container-use syringe according to claim 4, wherein the syringe is provided so as to be in close contact with the flange plate, and the filter is attached to the flange plate so as to cover the small hole.

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