JP2008167954A - Syringe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary operation type syringe in which a click can simply and inexpensively be provided and the click can easily be turned on/off. <P>SOLUTION: In the syringe, a flange 4 with a female screw 3 is mounted on a syringe barrel 1, a male screw 7 formed at the shaft part 6 of a plunger 5 is screwed to the female screw 3 of the flange 4 with the screw, and a click projection 9 is engaged with a groove 8 in an axial direction formed at the shaft part of the plunger 5 so as to rotate the shaft part 6 of the plunger 5 for a prescribed angle. The syringe comprises: a movable piece 10 with the click projection 9, provided movably in a radial direction on the outer peripheral side of the shaft part 6 of the plunger 5; and a pressurizing piece 11 for pressurizing and moving the movable piece 10 to the side of the shaft part 6 of the plunger 5 and engaging the click projection 9 with the groove 8 in the axial direction formed at the shaft part 6 of the plunger 5. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a syringe that enables precise discharge by screwing a plunger to the syringe barrel side and rotating the plunger, and more particularly to a syringe that can be confirmed by clicking the rotation of the plunger.

For example, there is a procedure of centrifuging fat sucked by an aspirator, sucking only necessary fat into a syringe, and returning it to the body again.
As a syringe used for such a treatment, as disclosed in Patent Document 1, there is a syringe that enables precise discharge in a minute amount by screwing a plunger to the syringe barrel side and rotating the plunger. .

In this syringe, a threaded flange having a female thread is attached to the flange of the syringe barrel, and the male thread formed on the shaft part of the plunger is screwed onto the female thread of the threaded flange, and the axial direction formed on the shaft part A click ball provided on the threaded flange side is engaged with the groove.
In this syringe, the click ball is engaged with the groove in the axial direction every time the plunger rotates once, so that the rotation of the plunger can be confirmed by clicking.

However, in this conventional syringe, the screw holding the click ball together with the spring is embedded in the threaded flange so that the click ball protrudes from the female thread of the threaded flange, so the structure of the threaded flange is complicated. To increase the cost and to turn off the click, it was necessary to slide the threaded flange to disengage the plunger shaft from the female thread and move it to another hole without threads.
Japanese National Patent Publication No. 2005-535415

  An object of the present invention is to provide a syringe that can be easily turned on and off while providing a click at a simple and low cost in a rotary operation type syringe in view of the problems of the conventional syringe. .

  In order to achieve the above object, the syringe of the present invention is provided with a threaded flange having a female thread mounted on a syringe barrel, and a male thread formed on a shaft portion of the plunger is screwed onto the female thread of the threaded flange. In the syringe in which the click protrusion is engaged with the axial groove formed in the shaft portion of the plunger every time the shaft portion of the plunger is rotated by a predetermined angle, the plunger is movably provided in the radial direction on the outer peripheral side of the plunger shaft portion. , A movable piece provided with the click protrusion, and a pressing piece that engages the click protrusion with an axial groove formed on the plunger shaft by pressing and moving the movable piece toward the plunger shaft. It is characterized by comprising.

  In this case, by attaching a threaded flange to the syringe barrel, the movable piece is pressed and moved by the pressing piece toward the plunger shaft, and the click protrusion is engaged with the axial groove formed in the plunger shaft. In addition to releasing the threaded flange from the syringe barrel, the pressing of the movable piece by the pressing piece is released so that the click projection does not engage with the axial groove formed in the shaft part of the plunger. can do.

  Further, the movable piece can be formed on the threaded flange, and the pressing piece can be formed on the syringe barrel.

  Alternatively, the movable piece can be formed integrally with the threaded flange and the pressing piece can be integrally formed with the syringe barrel.

  Moreover, a syringe can be formed with a synthetic resin.

  According to the syringe of the present invention, a threaded flange having a female thread is attached to the syringe barrel, and the male thread formed on the plunger shaft is screwed into the female thread of the threaded flange, and the plunger is formed on the plunger shaft. In the syringe in which the click protrusion is engaged with the axial groove each time the shaft portion of the plunger is rotated by a predetermined angle, the click protrusion provided movably in the radial direction on the outer peripheral side of the plunger shaft portion is provided. A movable piece provided, and a pressure piece that presses and moves the movable piece toward the shaft portion of the plunger so that the click protrusion is engaged with an axial groove formed in the shaft portion of the plunger. Thus, for example, by forming the movable piece using a resin spring, the click can be provided easily and at low cost, and the click can be easily turned on and off.

  In addition, by attaching a threaded flange to the syringe barrel, the movable piece is pressed and moved by the pressing piece toward the plunger shaft, and the click protrusion is engaged with the axial groove formed in the plunger shaft. At the same time, by releasing the threaded flange from the syringe barrel, the pressing of the movable piece by the pressing piece is released so that the click projection does not engage with the axial groove formed in the shaft part of the plunger. The click can be turned off. And in this position, while being able to use a syringe as a normal syringe which is not a screw type, a threaded flange can be rapidly rotated and moved without big resistance along the external thread formed in the axial part of a plunger.

  Further, the entire mechanism can be simply configured by forming the movable piece on the threaded flange and the pressing piece on the syringe barrel.

  Moreover, the syringe can be easily manufactured by forming the movable piece on the threaded flange and the pressing piece on the syringe barrel.

  In addition, the syringe can be manufactured more easily by forming the syringe from a synthetic resin.

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

1 to 5 show an embodiment of the syringe of the present invention.
In this syringe, a threaded flange 4 having a female thread 3 is attached to the flange 2 of the syringe barrel 1, and a male thread 7 formed on the shaft portion 6 of the plunger 5 is screwed onto the female thread 3 of the threaded flange 4. The click protrusion 9 is engaged with the axial groove 8 formed in the shaft portion 6 of the plunger 5 every time the shaft portion 6 of the plunger 5 rotates by a predetermined angle.
And this syringe presses the movable piece 10 provided with the click protrusion 9 provided in the radial direction at the outer peripheral side of the axial part 6 of the plunger 5, and the movable piece 10 to the axial part 6 side of the plunger 5, A pressing piece 11 is provided that moves and engages the click protrusion 9 with the axial groove 8 formed in the shaft portion 6 of the plunger 5.

  In this embodiment, the movable piece 10 is formed on the threaded flange 4 side, the pressing piece 11 is formed on the syringe barrel 1 side, and the threaded flange 4 is mounted on the flange 2 of the syringe barrel 1. Thus, the movable piece 10 is pressed and moved to the shaft portion 6 side of the plunger 5 by the pressing piece 11 so that the click protrusion 9 is engaged with the axial groove 8 formed in the shaft portion 6 of the plunger 5. At the same time, by removing the threaded flange 4 from the flange 2 of the syringe barrel 1, the pressing of the movable piece 10 by the pressing piece 11 can be released.

The syringe barrel 1 includes a discharge portion 12 and a screw cylinder 13 formed around the discharge portion 12 and connected to a tube, an injection needle, and the like at the tip.
In addition, a pair of flanges 2 are provided in the diameter direction at the base portion of the syringe barrel 1, and a short cylindrical portion 14 provided concentrically with the syringe barrel 1 and a short cylindrical portion further on the base side than the flange 2. A pressing piece 11 is provided that protrudes from the inside of the cylindrical portion 14 and presses the movable piece 10 toward the shaft portion 6 of the plunger 5 by the rotation of the threaded flange 4.
In this embodiment, a pair of pressing pieces 11 are provided in the diameter direction, and any pressing piece 11 can press the movable piece 10 even if the mounting angle of the threaded flange 4 changes by 180 °. Yes.
Note that a discharge scale 15 is provided on the peripheral surface of the syringe barrel 1.

The threaded flange 4 has slits 16 into which the flange 2 of the syringe barrel 1 is fitted at both ends, and the threaded flange 4 is rotated by rotating the threaded flange 4 to a position overlapping the flange 2 as shown in FIG. As shown in FIG. 2 (b), the flange 2 is integrated with the flange 2, and is detached from the flange 2 by being rotated to a position that intersects around 90 °.
A female screw 3 is formed at the center of the threaded flange 4, and a male screw 7 of the shaft portion 6 of the plunger 5 is screwed into the female screw 3.

The threaded flange 4 has a click protrusion 9 that engages with the groove 8 of the plunger 5, and the click protrusion 9 has a shaft portion 6 of the plunger 5 as shown in FIGS. 2 (a) and 2 (b). Is integrally provided at the distal end of the movable piece 10 that is movably provided in the radial direction on the outer peripheral side of the outer peripheral portion.
The movable piece 10 extends from one end of a guide wall 17 that guides the pressing piece 11 of the syringe barrel 1 and is formed in a shape that swells outward.
The movable piece 10 is formed of a resin spring. Usually, the click projection 9 is held at a position away from the shaft portion 6 of the plunger 5, and the pressing piece 11 is moved by the rotation of the threaded flange 4. By pressing from the outside, the tip end side swings toward the shaft portion 6 side of the plunger 5, and the click protrusion 9 is moved to a position where it can engage with the groove 8.

  In the plunger 5, a gasket 18 is attached to the tip of the shaft portion 6, and the male screw 7 of the shaft portion 6 is screwed into the female screw 3 of the threaded flange 4.

  And the plunger 5 rotates the shaft part 6 of the plunger 5 by a predetermined angle by rotating the shaft part 6 of the plunger 5 via the handle 19 in a state where the threaded flange 4 is mounted on the flange 2 of the syringe barrel 1. Each time, it is possible to perform a precise and precise discharge.

On the other hand, by removing the threaded flange 4 from the flange 2 of the syringe barrel 1, the pressing of the movable piece 10 by the pressing piece 11 can be released and the click can be turned off. At this position, the syringe can be used as a normal non-screw type syringe (for example, suction) and has a large resistance along the male screw 7 formed on the shaft portion 6 of the plunger 5 with the threaded flange 4. It can rotate and move quickly.
A single axial groove 8 is formed in the shaft portion 6 of the plunger 5, and the rotation of the shaft portion 6 of the plunger 5 is performed via the handle 19 by engaging the click projection 9 with this groove 8. Can be confirmed by one click each time the shaft portion 6 of the plunger 5 rotates by a predetermined angle (360 ° in this embodiment).
For example, when two axial grooves 8 are formed with an interval of 180 °, it can be confirmed by one click each time the shaft portion 6 of the plunger 5 rotates 180 °. When four are formed at intervals of 90 °, the shaft portion 6 of the plunger 5 can be confirmed by clicking once every time the shaft portion 6 of the plunger 5 rotates 90 °, and can be confirmed by clicking. The rotation angle of 6 can be arbitrarily set.

  In the present embodiment, the syringe is made of synthetic resin, and the movable piece 10 is formed integrally with the threaded flange 4 and the pressing piece 11 is formed integrally with the syringe barrel 1, thereby simplifying the manufacture of the syringe. However, the material of the syringe and the shapes and forming positions of the movable piece 10 and the pressing piece 11 can be arbitrarily set as appropriate.

  Thus, in the syringe of this embodiment, the threaded flange 4 having the female thread 3 is attached to the flange 2 of the syringe barrel 1, and the male thread 7 formed on the shaft 6 of the plunger 5 is formed on the female thread 3 of the threaded flange 4. In the syringe in which the click protrusion 9 is engaged with the axial groove 8 formed in the shaft portion 6 of the plunger 5 each time the shaft portion 6 of the plunger 5 is rotated by a predetermined angle, A movable piece 10 provided with a click projection 9 provided movably in the radial direction on the outer peripheral side of the shaft portion 6, and the movable piece 10 is pressed and moved toward the shaft portion 6 side of the plunger 5 to move the shaft portion of the plunger 5. 6 is provided with the pressing piece 11 that engages the click projection 9 with the axial groove 8 formed on the inner surface 6. For example, by forming the movable piece 10 using a resin spring, it is simple and low cost. Click Provided with a, for example, by forming the movable piece using a resin spring, it is possible to provide a click simplicity and low cost, it is possible to turn on and off easily clicks.

  As mentioned above, although the syringe of this invention was demonstrated based on the Example, this invention is not limited to the structure described in the said Example, The structure is suitably changed in the range which does not deviate from the meaning. Can do.

  The syringe of the present invention is a rotary operation type syringe, and it has a characteristic that a click for confirming rotation is provided easily and at a low cost, and the click is easily turned on / off. Can be used widely and suitably for the use of syringes that perform proper discharge.

1 shows one embodiment of the syringe of the present invention, (a) is a partially sectional side view showing a state where the plunger is moved to the suction side, and (b) is a partially sectional view showing a state where the plunger is moved to the discharge side. A side view and (c) are back views of a syringe. The syringe is shown, (a) (b) is sectional drawing which shows rotation fitting of a threaded flange, and a movement of a movable piece, (c) (d) is a perspective view of a syringe. The threaded flange is shown, (a) is a front view thereof, (b) is a side view thereof, (c) is a rear view thereof, and (d) is a sectional view of the female screw. A syringe barrel is shown, (a) is a side view thereof, (b) is a sectional view thereof, (c) is a rear view thereof, (d) is an enlarged view of a scale, and (e) is an enlarged sectional view of a screw cylinder. . (A) is a side view thereof, (b) is a sectional view thereof, (c) is a rear view thereof, (d) is an axial orthogonal sectional view, (e) is an enlarged view of a male screw and a groove, (f) ) Is an enlarged view of the protrusion of the handle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Syringe barrel 2 Flange 3 Female screw 4 Threaded flange 5 Plunger 6 Shaft part 7 Male screw 8 Groove 9 Click protrusion 10 Movable piece 11 Pressing piece 12 Discharge part 13 Screw cylinder 14 Short cylindrical part 15 Scale 16 Slit 17 Guide wall 18 Gasket 19 Handle

Claims (5)

  The syringe barrel is fitted with a threaded flange having a female thread, and the male thread formed on the plunger shaft is screwed into the female thread of the threaded flange, and the click projection is formed in the axial groove formed on the plunger shaft. In a syringe that is engaged each time the shaft portion of the plunger is rotated by a predetermined angle, a movable piece provided with the click protrusion provided movably in the radial direction on the outer peripheral side of the shaft portion of the plunger, and the movable A syringe, comprising: a pressing piece that presses and moves the piece toward the shaft portion of the plunger so that the click protrusion is engaged with an axial groove formed in the shaft portion of the plunger.   By attaching a threaded flange to the syringe barrel, the movable piece is pressed and moved by the pressing piece toward the plunger shaft, and the click protrusion is engaged with the axial groove formed in the plunger shaft. At the same time, by removing the threaded flange from the syringe barrel, the pressing of the movable piece by the pressing piece is released, and the click protrusion is not engaged with the axial groove formed in the shaft part of the plunger. The syringe according to claim 1.   The syringe according to claim 1 or 2, wherein the movable piece is formed on a threaded flange and the pressing piece is formed on a syringe barrel.   4. The syringe according to claim 3, wherein the movable piece is integrally formed with the threaded flange and the pressing piece is integrally formed with the syringe barrel.   The syringe according to claim 1, 2, 3 or 4, wherein the syringe is formed of a synthetic resin.

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