JP2018008718A - Pouring tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pouring tool which can pour a content repeatedly, surely, by a constant amount with a simple operation.SOLUTION: A pouring tool comprises: an outer cylinder 12 for storing a content 52; and a flange part 18 provided on an opening 16 which is formed on one side of the outer cylinder 12. The pouring tool further comprises: a plunger 20 inserted into the outer cylinder 12; a male screw part 30 provided on a side peripheral surface of the plunger 20; and a stopper 34 attached to the plunger 20 and has a female screw part 38. The stopper 34 has a contact plate 37 which contacts the flange part 18 of the outer cylinder 12, for preventing push-in of the plunger 20, and a detent part 50 which engages to the flange part 18, engaged to an axis periphery direction of the female screw part 38, and is not engaged in the axial direction. When the plunger 20 is rotated in the axis periphery direction, the stopper 34 is not rotated by the detent part 50, moves in the axial direction by the male screw part 30 and the female screw part 38, and a push-in possible length of the plunger 20 is changed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a dispenser that contains fluid contents and repeatedly dispenses the contained contents repeatedly.

  2. Description of the Related Art Conventionally, there is a dispenser that has a structure that allows a predetermined amount to be dispensed as a dispenser that accommodates fluid contents. For example, a syringe disclosed in Patent Document 1 has a cylindrical shape with one end released, a syringe provided with a flange around the open end, and a syringe needle attached to the other end, and a slide on the syringe. It includes a plunger portion that is movably inserted, and a plunger stopper of the plunger portion is provided with a movable stopper. When the stopper comes into contact with the cylinder, the movement distance of the plunger portion is restricted, and a predetermined amount of contents can be poured out. The stopper is provided with a bolt-like member, and the plunger is provided with a nut-like member that is screwed to the bolt-like member, and the position of the stopper in the plunger portion is changed by rotating the stopper around the axis. Can do.

  The dispenser capable of quantitative dispensing disclosed in Patent Document 2 includes a syringe, a piston, and a plunger that supports the piston at the tip, and a ring member that limits the stroke amount is planned on the syringe. Attached so that it can rotate around the jar. The plunger is provided with a plurality of stroke amount limiting portions locked to the ring member along the axis of the plunger. By rotating the ring member around its axis, the ring member is unlocked from the stroke amount limiting portion, locked to the next stroke amount limiting portion on the rear end side of the plunger, and pushed into place. Pour out a fixed amount. By repeating this operation in sequence, the content corresponding to the arrangement interval of the stroke amount restricting portions can be continuously dispensed quantitatively.

JP 2008-18088 A Japanese Patent No. 4907458

  In the case of Patent Document 1 of the above background art, it is not considered to continuously pour out a certain amount of contents, and the screw must be turned to the desired position by turning the screw while comparing the position of the stopper with the scale. The operation is cumbersome and inconvenient.

  In the case of Patent Document 2, the content corresponding to the arrangement interval of the stroke amount limiter can be continuously dispensed in a fixed amount, but the operation is troublesome and added in the middle of fine work such as dental treatment. It is difficult to repeatedly dispense the contents of

  The present invention has been made in view of the problems of the background art described above, and an object thereof is to provide a dispenser capable of reliably and quantitatively dispensing contents with a simple operation.

  The present invention includes an outer cylinder that accommodates contents, a flange provided in an opening formed in one of the outer cylinders, and a plunger that is slidably inserted into the opening of the outer cylinder. A stopper having a male screw portion provided on a side peripheral surface of the plunger and a female screw portion which is attached to the plunger and screwed into the male screw portion is provided on the stopper. A contact plate that prevents the plunger from being pushed in contact with the flange portion, and a detent portion that engages with the flange portion and is locked in the axial direction of the female screw portion and is not locked in the axial direction. Is an extractor provided. The plunger is rotatable about an axis with respect to the outer cylinder, and when the plunger is rotated about the axis, the stopper is stopped by the rotation preventing portion and screwed together. The male screw part and the female screw part are moved in the axial direction to change the pushable length of the plunger.

  The male thread portion of the plunger is provided with a positioning groove along the axial direction of the plunger, and the locking claw inserted into the positioning groove and the locking claw are integrated with the stopper. And an elastic piece having flexibility in the depth direction of the positioning groove, and when the plunger is rotated, the locking claw is moved each time the stopper moves a predetermined length in the axial direction. It is fitted in the positioning groove. A part of the inner side surface of the positioning groove is provided so as to stand up along the diameter direction of the plunger, and the locking claw of the stopper abuts on the inner side surface to rotate in the upright side surface direction. The restriction prevents the plunger from rotating in the direction in which the stopper moves in the axial direction toward the flange portion.

  Further, the stopper is provided with a cylindrical portion forming the female screw portion, and the cylindrical portion is composed of a pair of divided parts divided by two cutting lines along the axial direction of the cylindrical portion. The cutting line is provided with a hinge for connecting the pair of divided parts, and the other cutting line is provided with a locking portion on one of the divided parts, and the other divided part is engaged with the locking portion. A locked portion to be joined is provided.

  Further, the stopper is provided with a cylindrical portion that forms the female screw portion, and the cylindrical portion is composed of a pair of divided parts divided by two cutting lines along the axial direction of the cylindrical portion. In the cutting line, one of the divided parts is provided with a locking part, and the other divided part is provided with a locked part to be engaged with the locking part.

  The plunger is preferably provided with an idling groove in the vicinity of the end of the male screw portion. In addition, the flange portion of the outer cylinder has a shape that is long in one direction that intersects the axial direction of the outer cylinder, and has a shape that is long in one direction at the end located outside the opening of the plunger. The hook of the stopper is fitted in the positioning groove of the plunger at a position where the longitudinal direction of the flange and the longitudinal direction of the flange are parallel by the rotation of the plunger. It is to be combined.

  The dispenser of the present invention can reliably and quantitatively dispense contents with a simple operation. By simply turning the plunger around the axis, the stopper can be automatically moved a predetermined length along the axial direction of the plunger, and the pushing length of the plunger is determined to the predetermined length. The contents can be dispensed quantitatively. In particular, it is possible to easily dispense a certain amount of contents even in the middle of fine work such as dental treatment.

It is a perspective view of the extractor of 1st embodiment of this invention. It is a perspective view of the stopper of the extractor of 1st embodiment of this invention. It is a perspective view which shows the state which opened the stopper of the extraction device of 1st embodiment of this invention to a pair of division | segmentation part. The front view (a) which shows the state which the stopper contact | abutted to the flange part of the extractor of 1st embodiment of this invention, and the front view which shows the state which the stopper moved predetermined length from the flange part (b) ). FIG. 4A is a longitudinal sectional view taken along line AA. The vertical cross-sectional view (a) which shows the state which the stopper moved to the idling groove | channel before starting use of the content of the extractor of 1st embodiment of this invention, and a detent after the use of content is finished It is a longitudinal cross-sectional view (b) which shows the state which the part left | separated from the flange part. It is a perspective view of the extractor of 2nd embodiment of this invention. It is a perspective view of the stopper of the extractor of 2nd embodiment of this invention. It is a perspective view which shows the state which divided | segmented the stopper of the extractor of 2nd embodiment of this invention into a pair of division | segmentation part. The vertical cross-sectional view (a) which shows the state which the stopper moved to the idling groove before starting use of the contents of the dispenser of the second embodiment of the present invention, and the stopper after the use of the contents is finished It is a longitudinal cross-sectional view (b) which shows the state which moved to the idling groove.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 6 show a first embodiment of the present invention, and the dispenser 10 of this embodiment is provided with an outer cylinder 12 that houses the contents 52, and one end of the outer cylinder 12 is It is the spout 14 which pours the content 52, and the nozzle and needle | hook for extraction which are not shown in figure are attached. The other end is an opening 16, and a flange 18 that protrudes outward is provided on the peripheral edge of the opening 16. The shape of the flange portion 18 that intersects the axial direction of the outer cylinder 12 is formed in a rectangular shape, and has a short side 18a that is slightly longer than the diameter of the outer cylinder 12 and a long side 18b that is longer than the short side 18a. The central axis of the outer cylinder 12 is located at the center.

  A plunger 20 is inserted into the outer cylinder 12 through the opening 16. As shown in FIG. 6, a cylindrical sliding portion 22 that slides on the inner peripheral surface of the outer cylinder 12 is integrally provided at one end of the plunger 20 that is inserted into the outer cylinder 12. On the tip surface of the sliding portion 22, a convex portion 22 a is provided. A gasket 24 that slides in close contact with the inner peripheral surface of the outer cylinder 12 is attached to the convex portion 22a. The gasket 24 has a cylindrical shape with a short axial direction, and a concave portion 24a is formed on the surface on the plunger 20 side. The convex portion 22a of the plunger 20 is inserted into and closely adhered to the concave portion 24a of the gasket 24, and the sliding portion 22 and the gasket 24 are connected. In this connection, even if a force larger than the frictional resistance with the gasket 24 is applied to the plunger 20 in the direction of rotation about the axis, the gasket 24 does not rotate within the outer cylinder 12 and only the plunger 20 is the shaft. Rotate around.

  A flange portion 26 is integrally provided at an end portion of the plunger 20 that extends to the outside of the outer cylinder 12. The shape of the flange portion 26 that intersects the axial direction of the plunger 20 is formed in a rectangle that is slightly smaller than the flange portion 18, and the central axis of the plunger 20 is located at the center of the rectangle. The flange portion 26 is curved in the longitudinal direction, the pair of short sides 26 a is a straight line, the pair of long sides 26 b is a curve, and the pair of short sides 26 a is closer to the plunger 20 than the center in the longitudinal direction of the flange portion 26. It protrudes on the opposite side to the extending direction. You may provide the mark of the arrow etc. which show the direction which rotates the plunger 20 around an axis | shaft in order to move the stopper 34 mentioned later to the collar part 26. FIG.

  A spiral groove 28 is formed on the side peripheral surface of the plunger 20 to form a male screw portion 30 into which a stopper 34 described later is screwed. The male screw part 30 is provided with a linear positioning groove 32 intersecting the groove part 28 along the axial direction of the plunger 20. As shown in FIG. 5, a pair of positioning grooves 32 are provided, and are positioned away from each other in the diameter direction of the plunger 20. The positioning grooves 32 are respectively located in the middle of the lengths of the pair of long sides 26b of the flange portion 26. The positioning groove 32 has an L-shaped cross section that intersects the longitudinal direction. As shown in FIG. 5, the inner side surface 32 a facing the clockwise direction stands up along the diameter direction of the cross section of the plunger 20. Further, a positioning groove 32 is formed by being cut at a substantially right angle with respect to the inner side surface 32a. An idling groove 29 that is recessed at substantially the same depth as the spiral groove 28 is provided in a portion adjacent to the sliding portion 22. A portion of the side peripheral surface of the plunger 20 adjacent to the flange portion 26 is reinforced and thickened.

  A stopper 34 is attached to the male screw portion 30 of the plunger 20 in the vicinity of the outer cylinder 12. The stopper 34 is provided with a cylindrical portion 36 that covers the male screw portion 30. On the inner peripheral surface of the cylindrical portion 36, a female screw having a spiral projection 35 that is screwed into the groove portion 28 of the male screw portion 30 is formed. A portion 38 is provided. The cylindrical portion 36 is integrally provided with an abutting plate 37 at an end portion located on the outer cylinder 12 side when attached to the plunger 20. The abutting plate 37 is formed in a small rectangle, the pair of short sides 37a has substantially the same length as the outer diameter of the cylindrical portion 36, and the pair of long sides 37b is longer than the short side 18a of the flange portion 18. Is almost equal to

  The cylindrical portion 36 and the contact plate 37 are divided into two by a pair of cutting lines along the axial direction of the cylindrical portion 36. The cutting lines are located in the middle of the lengths of the pair of long sides 37b of the contact plate 37, that is, the left and right portions in FIG. The upper side of FIG. 5 is the divided part 34a, and the lower side is the divided part 34b. The split parts 34a and 34b are rotatably connected with a hinge 39 that connects the left cutting lines in FIG. On the opposite side, that is, on the right cutting line in FIG. 5, the split part 34a is provided with a locking part 40 projecting downward, and the split part 34b is a locked part 42 to which the locking part 40 is locked. Is provided so that it can be firmly connected so as not to be easily detached. When the locking portion 40 and the locked portion 42 are engaged, the cylindrical portion 36 becomes the original cylindrical female screw portion 38, and the contact plate 37 becomes the original single plate.

  The split part 34 a is provided with an L-shaped slit 44 in the cylindrical portion 36. The slit 44 has one short straight line intersecting with the L-shape at 90 ° and communicates with the end opposite to the contact plate 37 at a substantially right angle, and is positioned between the hinge 39 and the locking portion 40. The other long straight line extends from the end of the short straight line toward the hinge 39 along the circumference of the cylindrical portion 36 and reaches the vicinity of the hinge 39. A portion surrounded by the slit 44 and the end of the divided part 34 a becomes an elastic piece 46. The elastic piece 46 has a base end portion on the hinge 39 side, an end portion in contact with a short straight line of the slit 44 becomes a free end, and the free end moves and bends in the diameter direction of the cylindrical portion 36. A locking claw 48 is provided at the free end of the elastic piece 46 on the inner peripheral surface of the cylindrical portion 36. As shown in FIG. 5, the locking claw 48 has a triangular cross section perpendicular to the axial direction of the cylindrical portion 36, protrudes on the inner peripheral surface of the cylindrical portion 36, and is a surface continuous with a short straight line of the slit 44. Is located along the diameter of the cylindrical portion 36, and the opposite surface is located at a slightly acute angle with respect to it. The locking claw 48 is shaped to be fitted in the positioning groove 32 provided in the plunger 20.

  The divided part 34 b is provided with a rotation stopper 50 that is continuous with the short side 37 a of the contact plate 37. The anti-rotation portion 50 is a plate that intersects the contact plate 37 at a substantially right angle and protrudes to the opposite side of the cylindrical portion 36, and is provided with the same width as the short side 37 a of the contact plate 37. The part is formed by a curve that bulges outward. The surface on the extension line side of the cylindrical portion 36 of the rotation stopper 50 is an abutting surface 50 a, and the abutting surface 50 a abuts on the long side 18 b of the flange portion 18 when attached to the plunger 20.

  Among the above members, the material of the outer cylinder 12, the plunger 20, and the stopper 34 is made of a synthetic resin such as polyolefin or polyester. The gasket 24 is made of various elastic materials such as natural rubber, isoprene rubber, butadiene rubber, silicone rubber, and thermoplastic elastomer.

  Next, an assembling method and operation of the dispenser 10 will be described. A gasket 24 is attached to the plunger 20, inserted to the back of the outer cylinder 12, and the contents 52 are inserted from the spout 14. The gasket 24 moves to a position near the flange portion 18 of the outer cylinder 12, and the plunger 20 protrudes outward from the flange portion 18 long. A stopper 34 is attached to the male screw portion 30 of the plunger 20 in the vicinity of the flange portion 18. The stopper 34, with the divided parts 34 a and 34 b opened around the hinge 39, sandwiches the male screw portion 30, closes the hinge 39, and engages the locking portion 40 and the locked portion 42, so that the female screw A portion 38 is formed and screwed into the male screw portion 30. The rotation stopper 50 of the stopper 34 intersects and abuts one of the pair of long sides 18 b of the flange 18, and the tip of the rotation stopper 50 protrudes toward the outer cylinder 12 of the flange 18. As a result, the rotation preventing portion 50 engages with the flange portion 18 and is locked in the direction around the axis of the female screw portion 38, that is, in the direction around the axis of the outer cylinder 12. However, the internal thread portion 38 and the outer cylinder 12 are not locked in the axial direction, and can be moved in the axial direction.

  Even if a little force is applied to the plunger 20 to rotate around its axis, the plunger 20 is fitted with the convex portion 22a of the sliding portion 22 in the concave portion 24a of the gasket 24, and the gasket 24 is in close contact with the outer cylinder 12. Therefore, it does not rotate with respect to the outer cylinder 12. However, when the force for rotating the plunger 20 around the axis becomes larger than the frictional force between the convex portion 22a and the concave portion 24a, the gasket 24 does not rotate with respect to the outer cylinder 12, and only the plunger 20 has the axis. Rotate around.

  The stopper 34 does not rotate around the axis with respect to the outer cylinder 12 when the rotation stopper 50 is engaged with the flange 18. When the plunger 20 is rotated around the axis in this state, the stopper 34 is screwed into the male screw portion 30 of the plunger 20 and thus moves in the axial direction. When the plunger 20 is rotated clockwise in FIG. 5, the stopper 34 moves away from the flange portion 18. When rotated counterclockwise, the stopper 34 moves closer to the flange portion 18. When the rotation preventing part 50 is separated from the flange part 18, it moves together following the rotation around the axis of the plunger 20, and therefore does not move.

  When the plunger 20 is rotated around the axis, the locking claw 48 of the stopper 34 comes into contact with the side peripheral surface of the male screw portion 30 of the plunger 20, and the elastic piece 46 bends slightly outward. When the plunger 20 is further rotated around the axis, the locking claw 48 is fitted into the positioning groove 32, the elastic deformation of the elastic piece 46 is restored, and a click feeling is generated to be fitted into the positioning groove 32. In the positioning groove 32, the clockwise inner surface 32a in FIG. 5 is provided along the diameter direction of the plunger 20, so that the plunger 20 is restricted from rotating counterclockwise and rotates only clockwise. To do.

  Next, a method for using the dispenser 10 will be described. At the time of use, a dispensing nozzle or needle (not shown) is attached to the spout 14. Then, the plunger 20 is pushed, the gasket 24 is moved, and the content 52 is poured out from the spout 14. The plunger 20 stops being pushed at a position where the contact plate 37 of the stopper 34 contacts the flange portion 18. As described above, the plunger 20 is restricted from rotating counterclockwise in FIG. 5 with respect to the outer cylinder 12 and the stopper 34 and can rotate only clockwise. When force is applied in the direction in which the plunger 20 is rotated in the clockwise direction, when the force becomes larger than the frictional force between the concave portion 24a of the gasket 24 and the convex portion 22a of the plunger 20, the gasket 24 does not rotate. Only 20 rotates around the axis. The stopper 34 is engaged with the flange portion 18 of the outer cylinder 12 by the anti-rotation portion 50 to stop the rotation around the axis and is screwed into the male screw portion 30, so that the stopper 34 extends along the axial direction of the plunger 20. , Move away from the flange 18.

  When the plunger 20 is rotating, if the locking claw 48 of the stopper 34 matches the positioning groove 32 of the plunger 20, a click feeling is generated and fitted. It is possible to quantify a predetermined amount of the content 52 by setting in advance how much volume 52 of the content 52 corresponds to the length to be dispensed when rotated until it is fitted once. It becomes. When the locking claw 48 of the stopper 34 is fitted in the positioning groove 32, the long side 26b of the flange portion 26 and the long side 18b of the flange portion 18 are parallel to each other. This also shows the position to be fitted. And the collar part 26 is pushed, the plunger 20 is pushed in, and the content 52 is poured out from the spout 14. Pushing stops at a position where the contact plate 37 of the stopper 34 hits the flange portion 18, and a certain amount is poured out. This is repeated and the content 52 is poured out and used in a fixed amount.

  A pair of positioning grooves 32 is provided, and is fitted once every time the plunger 20 is rotated 180 °, and the amount of extraction is set small every half rotation. The amount of the predetermined content 52 to be dispensed can be quantified by a simple operation of twisting until the longitudinal direction of the flange portion 26 of the plunger 20 and the flange portion 18 of the outer cylinder 12 are the same. it can. Further, when a dispensing amount is required, the rotation preventing portion 50 is rotated a plurality of times within a range in which the rotation preventing portion 50 is not separated from the flange portion 18 with a half rotation as a unit amount.

  If the plunger 20 is turned too much, the detent portion 50 of the stopper 34 is separated from the flange portion 18 and rotates together with the plunger 20 so that the plunger 20 does not move further along the plunger 20. Can be prevented. The plunger 20 is locked counterclockwise by fitting a locking claw 48 into the positioning groove 32. However, when the plunger 20 is rotated counterclockwise with a large force, the plunger 20 is deep enough to get over the positioning groove 32 and rotate. Therefore, the stopper 34 is prevented from being damaged when it is rotated in reverse by an erroneous operation.

  If the male threaded portion 30 of the plunger 20 is rotated by mistake from the position protruding from the outer cylinder 12 when starting to use the contents 52, the stopper 34 is moved as shown in FIG. Since it moves to the idling groove 29 and is disengaged from the screw, it is not damaged. As shown in FIG. 6B, when the use of the contents 52 is finished and the plunger is further rotated, the stopper 34 may be pressed against the flange portion 26 by a screwing force and may be damaged. For this reason, before the stopper 34 is pressed against the flange part 26, the length of the anti-rotation part 50 and the length of the male screw part 30 are set so that the anti-rotation part 50 is separated from the flange part 18.

  According to the dispenser 10 of this embodiment, the content 52 can be reliably and quantitatively dispensed with a simple operation. The stopper 34 can be automatically moved to a predetermined position along the axial direction of the plunger 20 by a simple operation of rotating the plunger 20 around the axis, and the pushing length of the plunger 20 is set to a predetermined length. The content 52 can be dispensed quantitatively. For example, a certain amount of contents 52 can be easily added and dispensed even during a fine work such as dental treatment. In particular, it is possible to prevent the contents 52 from coming out excessively, and it is not necessary to be aware of the force to push the plunger 20, so that the operation is easy. Since the content 52 does not come out too much, the surroundings are not soiled, and the skin is not burdened by the components of the content 52 by adhering to the skin. The flange portion 26 is provided in a rectangular shape, and the plunger 20 can be easily rotated around the axis by rotating the flange portion 26. Since the locking claw 48 of the stopper 34 is fitted into the positioning groove 32 when the long side 26b of the flange portion 26 is substantially parallel to the long side 18b of the flange portion 18, the locking claw 48 is positioned in the positioning groove 32. It is easy to predict the position where it fits, and the operation is easy.

  Next, a second embodiment of the present invention will be described with reference to FIGS. Here, the same members as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. The dispenser 53 of this embodiment includes a pair of idling grooves that are in communication with the groove portion 28 and recessed at substantially the same depth in the portion adjacent to the sliding portion 22 of the plunger 20 and the portion adjacent to the flange portion 26. 29 is provided. A short portion between the flange portion 26 of the plunger 20 and the idling groove 29 is reinforced and thickened.

  A stopper 54 is attached to the male screw portion 30 of the plunger 20 in the vicinity of the outer cylinder 12. The stopper 54 is provided with a cylindrical portion 56 that covers the male screw portion 30. On the inner peripheral surface of the cylindrical portion 56, a female screw having a helical projection 55 that is screwed into the groove portion 28 of the male screw portion 30 is formed. A portion 58 is provided. The cylindrical portion 56 is integrally provided with an abutment plate 60 at an end located on the outer cylinder 12 side when attached to the plunger 20. The abutting plate 60 is formed in a small rectangle, the pair of short sides 60a has substantially the same length as the outer diameter of the cylindrical portion 56, and the pair of long sides 60b is longer than the short side 18a of the flange portion 18. Is almost equal to

  The pair of short sides 60 a of the contact plate 60 are respectively provided with rotation stoppers 61 having the same shape. The rotation stopper 61 is a plate that intersects the contact plate 60 at a substantially right angle and protrudes to the opposite side of the cylindrical portion 56, and is provided with the same width as the short side 60 a of the contact plate 60. The portion 61b is a straight line substantially parallel to the short side 60a, and is bent at about 90 ° toward the extension line side of the cylindrical portion 56 at a position slightly away from the pair of short sides 60a of the contact plate 60. The pair of leading edge portions 61b are formed so as to approach each other. The surface of the anti-rotation portion 61 on the extension line side of the cylindrical portion 56, that is, the surface where the pair of anti-rotation portions 61 face each other is an abutment surface 61a, and when attached to the plunger 20, the abutment surface 61a is It contacts the long side 18b of the flange 18.

  The cylindrical part 56 and the contact plate 60 are divided into two by a pair of cutting lines along the axial direction of the cylindrical part 56. The cutting lines are respectively located in the middle of the lengths of the pair of long sides 60b of the contact plate 60. The upper side is the divided part 54a, and the lower side is the divided part 54b. The pair of cutting lines of the divided part 54a are provided with locking portions 62 that project downward, and the pair of cutting lines of the divided part 54b have locked portions 64 to which the locking portions 62 are locked. It is provided and can be connected and released. When the locking portion 62 and the locked portion 64 are engaged, the cylindrical portion 56 becomes the original cylindrical female screw portion 58, the contact plate 60 becomes the original single plate, and a pair of rotation preventing portions 61 are positioned parallel to each other.

  The split part 54 a is provided with an L-shaped slit 44 in the cylindrical portion 56, and a portion surrounded by the slit 44 becomes an elastic piece 46, and the free end of the slit 44 is formed on the inner peripheral surface of the cylindrical portion 56. A locking claw 48 is provided. The locking claw 48 is shaped to be fitted in the positioning groove 32 provided in the plunger 20.

  Next, the assembly method and operation of the dispenser 53 will be described. A gasket 24 is attached to the plunger 20, inserted to the back of the outer cylinder 12, and the contents 52 are inserted from the spout 14. The gasket 24 moves to a position near the flange portion 18 of the outer cylinder 12, and the plunger 20 protrudes outward from the flange portion 18 long. A stopper 54 is attached to the male screw portion 30 of the plunger 20 in the vicinity of the flange portion 18. The stopper 54 forms a female screw part 58 by sandwiching the male screw part 30 and engaging the pair of locking parts 62 and the locked part 64 with the split part 54a and the split part 54b being separated from each other. And screwed into the male screw portion 30. The pair of detent portions 61 of the stopper 54 are in contact with the pair of long sides 18b of the flange portion 18 so as to cross each other, and the front end edge portion 61b of the detent portion 61 is bent toward the outer cylinder 12 side of the flange portion 18. It has a function to prevent falling out. Accordingly, the stopper 54 is locked in the direction around the axis of the female screw portion 58, that is, in the direction around the axis of the outer cylinder 12, and in the axial direction of the outer cylinder 12 by the screwing of the female screw portion 58 and the male screw portion 30. The rotation of the plunger 20 makes it possible to move in the axial direction within the range of the length of the detent 61.

  When the plunger 20 is rotated around the axis, the stopper 54 moves in the axial direction. When the locking claw 48 is fitted in the positioning groove 32, the elastic deformation of the elastic piece 46 is restored, and a click feeling is generated to fit in the positioning groove 32.

  Next, the method of using the dispenser 53 is the same as in the above embodiment. If the plunger 20 is turned too much, the rotation preventing portion 61 of the stopper 54 moves in a direction away from the flange portion 18, but the leading edge 61 b of the rotation preventing portion 61 is locked to the flange portion 18 and rotates. stop. Therefore, the content 52 is prevented from being taken out excessively.

  When the male thread portion 30 of the plunger 20 is rotated by mistake from the position protruding from the outer cylinder 12 when the use of the contents 52 is started, as shown in FIG. Therefore, the stopper 54 is not pressed against the screw terminal portion by the screwing force and is not damaged. As shown in FIG. 10 (b), when the plunger is further rotated after the use of the contents 52, the stopper 54 is not damaged so that the stopper 54 is not damaged by being pressed against the flange 26 by screwing force. It moves to the idling groove 29 on the part 26 side and idles.

  According to the dispenser 53 of this embodiment, it has the same effect as that of the above embodiment. Since the front end edge 61 b of the stopper 54 is locked to the flange portion 18, the stopper 54 is not separated from the flange portion 18 by more than a predetermined distance, thereby preventing the contents 52 from being taken out excessively. Can do. Further, since the idling groove 29 is provided also on the flange portion 26 side, the stopper 54 can be prevented from being damaged even if the stopper 54 is further rotated after the use of the contents 52 is finished.

  The dispenser of the present invention is not limited to the above embodiments, and the shape of each member can be changed as appropriate. The shapes of the flange portion and the collar portion may be any shape that is long in one direction such as an ellipse or an oval other than a rectangle. The lead of the male screw portion and the female screw portion is appropriately set according to the amount of contents to be dispensed. One pair of positioning grooves may not be provided. The contents only need to have fluidity, and may be anything other than a dental treatment filler, and may be a drug whose amount to be dispensed is determined, such as an anticancer agent.

10, 53 Dispenser 12 Outer tube 14 Outlet 16 Opening 18 Flange 20 Plunger 26 Hook 29 Lattice groove 30 Male thread 32 Positioning groove 32a Inner surface 34, 54 Stoppers 34a, 34b, 54a, 54b Split parts 36, 56 Tube portion 37, 60 Contact plate 38, 58 Female thread portion 39 Hinge 40, 62 Locking portion 42, 64 Locked portion 46 Elastic piece 48 Locking claw 50, 61 Anti-rotation portion 52 Contents

Claims (6)

An outer cylinder that accommodates the contents; a flange provided in an opening formed in one of the outer cylinders; a plunger that is slidably inserted into the opening of the outer cylinder; and the plunger A stopper having a male screw portion provided on the side peripheral surface of the screw and a female screw portion that is attached to the plunger and screwed into the male screw portion;
The stopper includes a contact plate that prevents the plunger from being pushed in contact with the flange portion of the outer cylinder, and a shaft that is engaged with the flange portion and locked in a direction around the shaft of the female screw portion. There is a detent that is not locked in the direction,
The plunger is rotatable about an axis with respect to the outer cylinder, and when the plunger is rotated about the axis, the stopper is not rotated by the detent part and is screwed together. The dispenser is moved in the axial direction by the male screw portion and the female screw portion, and the pushable length of the plunger is changed.   The male screw portion of the plunger is provided with a positioning groove along the axial direction of the plunger, and the stopper is integrally provided with a locking claw inserted into the positioning groove and the locking claw. An elastic piece having flexibility is provided in the depth direction of the positioning groove, and when the plunger is rotated, the locking claw is positioned each time the stopper moves a predetermined length in the axial direction. A part of the inner surface of the positioning groove is provided so as to stand up along the diameter direction of the plunger, the locking claw of the stopper contacts the inner surface, and the stopper is 2. The dispenser according to claim 1, wherein the plunger is prevented from rotating in the axial direction toward the flange portion.   The stopper is provided with a cylindrical portion that forms the female screw portion, and the cylindrical portion is composed of a pair of divided parts divided by two cutting lines along the axial direction of the cylindrical portion. Is provided with a hinge for connecting the pair of divided parts, and on the other cutting line, one of the divided parts is provided with a locking portion and the other divided part is engaged with the locking portion. The extractor according to claim 1, wherein a locked portion is provided.   The stopper is provided with a cylindrical portion that forms the female screw portion, and the cylindrical portion is composed of a pair of divided parts divided by two cutting lines along the axial direction of the cylindrical portion. 2. The dispenser according to claim 1, wherein one of the divided parts is provided with a locking portion, and the other divided part is provided with a locked portion to be engaged with the locking portion.   The dispenser according to claim 1, wherein the plunger is provided with an idling groove in the vicinity of an end portion of the male screw portion.   The flange portion of the outer cylinder has a shape that is long in one direction intersecting the axial direction of the outer cylinder, and has a long shape in one direction at an end located outside the opening of the plunger. The stopper claw of the stopper is fitted in the positioning groove of the plunger at a position where the longitudinal direction of the flange portion and the longitudinal direction of the flange portion are parallel to each other by the rotation of the plunger. The extractor according to claim 1 or 2.

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