JP5895724B2 - Syringe - Google Patents

Description

  The present invention relates to a syringe in which a connector is detachably attached to a syringe body.

  In a medical field, a syringe is used by being connected to an injection needle, a catheter, an infusion set, and the like. As a method for connecting the syringe and the counterpart device, the mouth portion of the syringe is inserted inside the counterpart device, and the male luer taper formed on the outer peripheral surface of the tip portion of the mouth portion is connected to the inner peripheral surface of the counterpart device. In addition to the connection method by simply fitting the formed female luer taper, in addition to the connection by this luer taper, a substantially cylindrical connector (luer lock) provided on the syringe so as to accommodate the mouth inside There is a method of connecting a counterpart device to the inner peripheral surface of the adapter (for example, a female screw provided on the inner peripheral surface of the connector is screwed with a male screw of the counterpart device).

  There is a syringe in which a connector is detachably attached to a syringe body so that either of these two connection methods can be used. For example, in the syringe of Patent Document 1, two arms are provided on the connection tool, and the claw portion at the tip of this arm is engaged with the recess provided on the outer peripheral surface of the syringe body, so that the syringe body The connection tool is held. Moreover, a connection tool is removed from a syringe main body by pressing the rear end of an arm and expanding the front-end | tip of an arm.

Japanese Patent No. 4599875

However, in the case of the syringe of Patent Document 1, there is a possibility that the connection tool may be mistakenly removed by manually picking the rear end of the arm or contacting the other end of the arm with the rear end of the arm.
In addition, the arm is an elongated rod-like member that is exposed to the outside, and thus may be damaged by contact with other instruments.

  Then, an object of this invention is to provide the syringe which can prevent the accidental disconnection and damage of a connection tool.

Means for Solving the Problems and Effects of the Invention

  The syringe according to the first aspect of the present invention is a syringe body having a cylindrical mouth portion with a male luer taper provided on the outer peripheral surface of the tip portion and a body portion having a diameter larger than the mouth portion, and a female luer taper on the inner periphery. A syringe that is used when connecting to another member provided on the surface and is detachably attached to the mouth, wherein the outer peripheral surface of the mouth is provided with a convex portion. The connecting tool is coaxial with the mouth, and has a cylindrical member that accommodates a part of the mouth inside, and an arc shape that is coaxial with the mouth when viewed from the axial direction. And an arcuate member that is mounted in a direction perpendicular to the axial direction with respect to the cylindrical member and restricts the axial movement of the cylindrical member with respect to the mouth portion, and the cylindrical member has a female screw inside. The cylinder body provided on the peripheral surface, and the axial direction of the cylinder body An annular plate that protrudes from an inner peripheral surface and an outer peripheral surface of the cylinder main body, and is formed at an end portion closer to the portion, and the inner peripheral surface of the annular plate is connected to the mouth portion of the cylindrical member. A concave portion is provided in which the convex portion is engaged in a circumferential direction so as to restrict rotational movement, and the arcuate member is close to the trunk portion with respect to the axial direction of the convex portion and the annular plate. A first arc plate facing the other surface, a second arc plate facing the surface farther from the body portion with respect to the axial direction of the portion protruding from the outer peripheral surface of the cylindrical body of the annular plate, and the first It has a connection part which connects the circular arc plate and the outer peripheral ends of the second arc plate.

According to this configuration, the cylindrical member is rotationally moved with respect to the syringe body by engaging the convex portion provided in the mouth portion with the concave portion provided in the inner peripheral surface of the annular plate of the cylindrical member. Be regulated. Further, the inner peripheral end of the first arc plate is sandwiched in the axial direction between the connecting portion of the mouth portion and the body portion and the convex portion, and the outer peripheral end of the annular plate is connected to the first arc plate. By being sandwiched between the second arc plate in the axial direction, the cylindrical member and the arc-shaped member are restricted from moving in the axial direction with respect to the syringe body.
When removing the connector from the syringe body, the arcuate member is pulled out in a direction perpendicular to the axial direction, and then the cylindrical member is moved in the axial direction and removed.
Therefore, since the connection tool does not come off from the mouth only by grasping the connection tool by hand or when the connection tool comes into contact with another device or the like, it is possible to prevent the connection tool from being accidentally detached.
In addition, since the cylindrical member and the arcuate member do not have a portion protruding in the axial direction, the cylindrical member and the arc-shaped member are less likely to be damaged than a conventional connector connected to the mouth portion by an arm extending in the axial direction.

  A syringe according to a second invention is the syringe according to the first invention, wherein the recess is provided at an end portion closer to the body portion with respect to the axial direction on the inner peripheral surface of the annular plate, and the shaft of the recess An inner surface far from the body portion with respect to the direction is opposed to the convex portion in the axial direction.

  According to this configuration, since the convex portion provided in the mouth portion is sandwiched in the axial direction between the first arc plate of the arc-shaped member and the concave portion of the cylindrical member, the arc-shaped member and the cylindrical member with respect to the syringe body Axial movement can be more reliably regulated.

  A syringe according to a third invention is the syringe according to the first or second invention, wherein the angle of the inner peripheral surface of the first arc plate is greater than 180 degrees, and from one end in the circumferential direction of the inner peripheral surface of the first arc plate. The opening width to the other end is smaller than the outer diameter of the position where the first arc plate of the mouth is mounted.

  According to this configuration, the mouth arranged inside the first arc plate is unlikely to come out from the opening on the inner peripheral surface of the first arc plate, so that it is possible to more reliably prevent the connector from being accidentally detached.

It is a perspective view of the syringe which concerns on embodiment of this invention. It is sectional drawing of the syringe along the AA line of FIG. It is a disassembled perspective view of a syringe. It is a perspective view of a cylinder member. It is the figure which looked at the syringe of the state which removed the circular-arc-shaped member from the front end side of the opening | mouth part.

Embodiments of the present invention will be described below.
As shown in FIG. 1, the syringe 1 of this embodiment includes a syringe body 3, a connector 2 that is detachably attached to the syringe body 3, and a gasket (not shown) that can slide within the syringe body 3. And a plunger (not shown) for moving the gasket. In the following description of the syringe 1, the direction along the longitudinal direction of the syringe body 3 is referred to as “axial direction”. 1-3 are referred to as front and rear.

  The syringe 1 of the present embodiment can be used as a prefilled syringe that has been filled with a chemical solution or the like in advance or a syringe for other uses. The syringe 1 is used by being connected to another member having a female luer taper provided on the inner peripheral surface.

  As shown in FIGS. 1 and 2, the syringe main body 3 has a cylindrical body 4 and a cylindrical mouth 5 having a smaller diameter than the body 4. By moving a plunger (not shown) to the mouth part 5 side of the syringe body 3, the chemical liquid or the like stored in the syringe body 3 is discharged from the mouth part 5. The syringe body 3 is made of a synthetic resin.

  As shown in FIG. 3, a plurality of convex portions 7 are provided side by side in the circumferential direction on the outer peripheral surface in the vicinity of the base end portion of the mouth portion 5. Moreover, the outer peripheral surface (portion excluding the convex portion 7) of the mouth portion 5 is formed in a tapered shape. A portion of the outer peripheral surface of the mouth portion 5 that is in front of the convex portion 7 constitutes a male luer taper 6 that fits with a female luer taper of another member.

  The connector 2 is detachably attached to the mouth portion 5 of the syringe body 3. The connector 2 is used, for example, when the syringe 1 is connected to another member (not shown) having a female luer taper provided on the inner peripheral surface and a male screw provided on the outer peripheral surface. When connecting to other members other than those described above and the connecting tool 2 is in the way, the connecting tool 2 is removed. The connection tool 2 is made of a synthetic resin and includes a cylindrical member 10 and an arcuate member 20.

  The tubular member 10 is disposed coaxially with the mouth portion 5 and is attached to the mouth portion 5 so as to accommodate the axial range from the vicinity of the tip of the mouth portion 5 to the convex portion 7 inside. The cylinder member 10 is composed of a cylinder body 11 and an annular plate 14.

  A female screw 12 that can be screwed with a male screw of another member is provided on the inner peripheral surface of the tube main body 11. A plurality of ribs 13 are provided on the outer peripheral surface of the cylinder body 11 along the axial direction. The rib 13 has a function of preventing slipping when the cylinder body 11 is gripped with a finger.

  The annular plate 14 is formed at the rear end of the tube main body 11 and protrudes from the inner peripheral surface and the outer peripheral surface of the tube main body 11. A portion of the annular plate 14 protruding from the outer peripheral surface of the cylinder main body 11 is referred to as an outer peripheral end portion 16.

  As shown in FIG. 4, a plurality of recesses 15 are provided on the inner peripheral surface of the annular plate 14 side by side in the circumferential direction. The plurality of concave portions 15 engage with the plurality of convex portions 7 provided in the mouth portion 5. The side surface of the convex portion 7 faces the side surface of the concave portion 15 in the rotational direction. Therefore, the rotational movement of the tubular member 10 with respect to the mouth portion 5 is restricted. Thereby, when screwing the male screw 12 of the other member into the female screw 12 of the cylindrical member 10, it is possible to prevent the cylindrical member 10 from idling.

  Moreover, the recessed part 15 is provided in the rear end of the internal peripheral surface of the cyclic | annular board 14, and the front of the recessed part 15 is obstruct | occluded. The front surface of the convex portion 7 faces the front surface of the concave portion 15. The axial length of the concave portion 15 is the same as or slightly larger than the axial length of the convex portion 7.

  The arcuate member 20 includes a first arc plate 21, a second arc plate 22 disposed in front of the first arc plate 21, and a circle connecting the outer peripheral ends of the first arc plate 21 and the second arc plate 22. It is comprised with the arc-shaped connection part 23. FIG. The first arc plate 21 and the second arc plate 22 are arc-shaped flat plates coaxial with the mouth portion 5 when viewed from the axial direction.

  The first arc plate 21 is disposed in contact with or close to the rear surface of the convex portion 7 and the annular plate 14. Further, the second arc plate 22 is disposed in contact with or close to the front surface of the outer peripheral end portion 16 of the annular plate 14. The outer peripheral end 16 of the annular plate 14 is sandwiched between the first arc plate 21 and the second arc plate 22. Therefore, the arcuate member 20 and the cylindrical member 10 are restricted from relative movement in the axial direction. The axial length of the connecting portion 23 (the separation distance between the first arc plate 21 and the second arc plate 22) is the same as or slightly larger than the axial length of the outer peripheral end portion 16 of the annular plate 14. Further, the inner diameter of the connecting portion 23 is the same as or slightly larger than the outer diameter of the annular plate 14.

  Further, the convex portion 7 is sandwiched in the axial direction between the front surface of the first arc plate 21 and the front surface of the concave portion 15 of the annular plate 14. By sandwiching this configuration and the outer peripheral end 16 of the annular plate 14 between the first arc plate 21 and the second arc plate 22, the relative movement in the axial direction of the tubular member 10 and the arc-shaped member 20 is restricted. As a result, the cylindrical member 10 and the arcuate member 20 are restricted from moving in the axial direction with respect to the syringe body 3.

  The inner diameter of the first arc plate 21 is substantially the same as or slightly larger than the outer diameter R (see FIG. 2) at the position where the first arc plate 21 of the mouth portion 5 is mounted. As shown in FIG. 5, the angle of the inner circumferential surface of the first arc plate 21 is about 240 degrees, and the opening width W from one circumferential end to the other end of the inner circumferential surface of the first arc plate 21 is It is smaller than the outer diameter R (see FIG. 2) at the position where the first arc plate 21 of the mouth portion 5 is mounted. Therefore, the mouth portion 5 is difficult to come out from the inside of the first arc plate 21. The angle of the outer peripheral surface of the first arc plate 21 is about 280 degrees. The 1st circular arc board 21 should just contact | abut to the rear surface of the convex part 7 or the annular plate 14 at the time of mounting | wearing.

  The inner diameter of the second arc plate 22 is the same as or slightly larger than the maximum outer diameter of the cylinder main body 11 (the outer diameter at the position where the rib 13 is located). The angle of the outer peripheral surface of the second arc plate 22 and the angle of the inner peripheral surface are substantially the same, and are approximately 180 degrees. The rear surface of the second arc plate 22 only needs to come into contact with the front surface of the outer peripheral end portion 16 of the annular plate 14 when mounted.

  When removing the connector 2 from the syringe body 3, if the pulling force is applied to the arcuate member 20 in the direction orthogonal to the axial direction, the first arc plate 21 is elastically deformed in the diameter increasing direction, and the first arc The opening on the inner peripheral surface of the plate 21 is larger than W and the mouth part 5 comes out. Thereby, the arc-shaped member 20 is removed from the cylindrical member 10 and the syringe body 3. Thereafter, the cylindrical member 10 is removed from the syringe body 3 by moving the cylindrical member 10 forward with respect to the mouth portion 5.

In the syringe 1 of this embodiment, when removing the connector 2 from the syringe body 3, the arcuate member 20 is pulled out in a direction perpendicular to the axial direction, and then the cylindrical member 10 is moved in the axial direction and removed. Therefore, since the connection tool 2 does not come off from the mouth portion 5 simply by grasping the connection tool 2 by hand or when the connection tool 2 is in contact with another device or the like, it is possible to prevent the connection tool 2 from being accidentally detached.
Moreover, since the cylindrical member 10 and the circular-arc-shaped member 20 do not have a portion protruding in the axial direction, the cylindrical member 10 and the arc-shaped member 20 are less likely to be damaged than a conventional connector connected to the mouth portion by an arm extending in the axial direction.

  In the present embodiment, the angle of the inner peripheral surface of the first arc plate 21 is larger than 180 degrees, and the opening width W of the inner peripheral surface of the first arc plate 21 is smaller than the outer diameter R of the mouth portion 5. It has become. Therefore, the mouth portion 5 arranged inside the first arc plate 21 is unlikely to come out from the opening on the inner peripheral surface of the first arc plate 21, so that it is possible to more reliably prevent the connector 2 from being accidentally detached.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims.

  In the said embodiment, although the convex part 7 and the recessed part 15 are provided in multiple numbers along the circumferential direction in the annular plate 14 and the opening | mouth part 5, respectively, you may be provided one each.

  In the above embodiment, the recess 15 is provided at the rear end of the inner peripheral surface of the annular plate 14 and the front of the recess 15 is closed, but the recess 15 may penetrate in the axial direction. Even in this case, the inner circumferential end of the first arc plate 21 is sandwiched in the axial direction between the connecting portion between the mouth portion 5 and the body portion 4 and the convex portion 7, so that the arc-shaped member 20. Since the axial movement with respect to the syringe body 3 can be restricted, there is no problem. However, in order to more reliably regulate the axial movement of the arcuate member 20 and the cylindrical member 10 with respect to the syringe body 3, the configuration of the above embodiment is preferable.

  In the above embodiment, the angle of the inner peripheral surface of the first arc plate 21 is about 240 degrees, but may be smaller than 240 degrees. Further, if the mouth portion 5 can be passed between one end and the other end of the inner peripheral surface of the first arc plate 21, the angle of the inner peripheral surface of the first arc plate 21 is larger than 240 degrees. Good. In addition, it is preferable that the angle of the internal peripheral surface of the 1st circular arc plate 21 is larger than 180 degree | times, and 220-260 degree | times are especially preferable.

  In the above embodiment, the angle of the outer peripheral surface of the first arc plate 21 is about 280 degrees, but may be smaller than 280 degrees. Moreover, the angle of the outer peripheral surface of the first arc plate 21 may be larger than 280 degrees as long as the mouth portion 5 can be passed between one end and the other end of the outer peripheral surface of the first arc plate 21 in the circumferential direction.

  In the above embodiment, the angle of the inner peripheral surface of the second arc plate 22 is 180 degrees, but may be smaller than 180 degrees. Moreover, if the cylinder main body 11 can be passed between the circumferential direction one end and the other end of the inner circumferential surface of the second arc plate 22, the angle of the inner circumferential surface of the second arc plate 22 is larger than 180 degrees. Good. When the angle of the inner peripheral surface of the second arc plate 22 is made larger than 180 degrees, and the opening width from one end to the other end of the inner peripheral surface of the second arc plate 22 is made smaller than the outer diameter of the tube main body 11 Since the second arc plate 22 is unlikely to be detached from the cylinder body 11, it is possible to more reliably prevent the connector 2 from being accidentally detached.

  In the above embodiment, the angle of the outer peripheral surface of the second arc plate 22 is 180 degrees, but may be smaller than 180 degrees. Further, the angle of the outer peripheral surface of the second arc plate 22 may be larger than 180 degrees as long as the cylinder main body 11 can be passed between one end and the other end of the outer peripheral surface of the second arc plate 22 in the circumferential direction.

  In the above embodiment, the angle of the connecting portion 23 is 180 degrees, but may be smaller than 180 degrees. Moreover, the angle of the outer peripheral surface of the connection part 23 may be larger than 180 degree, if the cyclic | annular board 14 can be passed between the circumferential direction one end and the other end of the connection part 23. FIG. When the angle of the connecting portion 23 is made larger than 180 degrees and the opening width from one end to the other end in the circumferential direction of the connecting portion 23 is made smaller than the outer diameter of the annular plate 14, the connecting portion 23 is difficult to come off from the annular plate 14. Therefore, it is possible to prevent the connector 2 from being accidentally detached.

  In the above embodiment, the angle of the inner peripheral surface of the first arc plate 21 and the angle of the outer peripheral surface of the first arc plate 21 are different, but may be the same.

  In the above embodiment, the angle of the inner peripheral surface of the second arc plate 22, the angle of the outer peripheral surface of the second arc plate 22, and the angle of the connecting portion 23 are all the same, but may be different.

  In the above embodiment, the angle of the outer peripheral surface of the first arc plate 21 and the angle of the outer peripheral surface of the second arc plate 22 are different, but may be the same.

DESCRIPTION OF SYMBOLS 1 Syringe 2 Connector 3 Syringe main body 4 Body part 5 Mouth part 6 Osluer taper 7 Convex part 10 Cylinder member 11 Cylinder main body 12 Female screw 14 Annular plate 15 Recessed part 16 Outer peripheral edge 20 Arc-shaped member 21 Arc plate 23 connecting part

Claims (3)

A syringe body having a cylindrical mouth portion on which the male luer taper is provided on the outer peripheral surface of the tip portion and a body portion having a diameter larger than that of the mouth portion,
A syringe comprising a female luer taper that is used when connecting to other members provided on the inner peripheral surface, and a connector that is detachably attached to the mouth,
A convex portion is provided on the outer peripheral surface of the mouth,
The connector is
A cylindrical member that is coaxial with the mouth portion and accommodates a part of the mouth portion inside;
A circular arc shape that is coaxial with the mouth portion when viewed from the axial direction, is mounted in a direction perpendicular to the axial direction with respect to the mouth portion and the tubular member, and allows the tubular member to move in the axial direction with respect to the mouth portion. An arc-shaped member to be regulated,
The cylindrical member is
A cylinder body provided with a female screw on the inner peripheral surface;
An annular plate that protrudes from the inner and outer peripheral surfaces of the cylindrical body, formed at the end closer to the body portion with respect to the axial direction of the cylindrical body,
The inner peripheral surface of the annular plate is provided with a concave portion in which the convex portion engages in a circumferential direction so as to restrict the rotational movement of the cylindrical member with respect to the mouth portion.
The arcuate member is
A first arc plate facing a surface closer to the body portion with respect to the axial direction of the convex portion and the annular plate;
A second arc plate facing the surface farther from the body part with respect to the axial direction of the portion protruding from the outer peripheral surface of the cylindrical body of the annular plate;
A syringe having a connecting portion that connects outer peripheral ends of the first arc plate and the second arc plate. The concave portion is provided at an end portion closer to the trunk portion in the axial direction on the inner peripheral surface of the annular plate;
2. The syringe according to claim 1, wherein an inner surface of the concave portion farther from the body portion with respect to the axial direction is opposed to the convex portion in the axial direction. An angle of an inner peripheral surface of the first arc plate is larger than 180 degrees;
The opening width from the circumferential direction one end of the inner peripheral surface of the first arc plate to the other end is smaller than the outer diameter of the position of the mouth where the first arc plate is mounted. Or the syringe of 2.