Syringe container auxiliary tool

Abstract

Using a current syringe container, a specified amount of the liquid content is ejected stepwise multiple times. [Solution] A guide protrusion (26) protruding radially outward is formed on the plunger retainer (13), and a guide groove (24) into which the guide protrusion is movably inserted is formed on the main body tube (11), and the guide groove comprises a first vertical groove (31) extending in the front-to-rear direction, a first horizontal groove (32) extending from the front end of the first vertical groove to one circumferential side (A), a second vertical groove (33) extending forward from the one circumferential end of the first horizontal groove, a second horizontal groove (37) extending from the front end of the second vertical groove to one circumferential side, an inclined groove (38) extending forward from the rear end of the first vertical groove to one circumferential side, and a third vertical groove (39) extending forward from the one circumferential end of the inclined groove and communicating with the one circumferential end of the second horizontal groove, and a first sliding contact portion (27) and a second sliding contact portion (28) that slide against each other are separately formed on the push button (12) and the plunger retainer.

Description

[Technical Field]

[0001] The present invention relates to an auxiliary tool for a syringe container. [Background technology]

[0002] Conventionally, a syringe container having a syringe extending in the front-to-rear direction and having an ejection hole for the liquid contents, and a plunger protruding rearward from the syringe and movable forward, has been known that is configured to eject a specified amount of the liquid contents in stages multiple times, as shown in Patent Document 1 below, for example. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-217399 Summary of the Invention [Problem to be solved by the invention]

[0004] For this type of syringe container, it was necessary to adopt a new structure in place of the current syringe container that discharges all the liquid contained in the syringe with one push.

[0005] The present invention provides an auxiliary tool for a syringe container that can eject a specified amount of liquid content in stages over multiple times using an existing syringe container. [Means for solving the problem]

[0006] A syringe container auxiliary tool according to one aspect of the present invention is an auxiliary tool for a syringe container that is attached to a syringe container having a syringe that extends in the front-to-rear direction and has a discharge hole for a liquid content, and a plunger that protrudes rearward from the syringe and is provided so as to be movable forward, and that includes a main body tube that is detachably attached to the syringe and extends rearward, a push button that protrudes rearward from the main body tube and is provided so as to be movable forward, a plunger presser that is linked to the front-to-rear movement of the push button and pushes the plunger forward, and a mechanism for connecting the push button and the plunger and a biasing member that supports a plunger retainer in a rearward biasing state so as to be movable forward, wherein the push button is provided so as to be movable forward in a state in which rotational movement in the circumferential direction is restricted relative to the main body tube, the plunger retainer is formed with a guide protrusion that protrudes radially outward, and the main body tube is formed with a guide groove into which the guide protrusion is movably inserted, the guide groove comprising a first vertical groove extending in the front-rear direction, a first horizontal groove that extends from a front end of the first vertical groove to one side in the circumferential direction, a second vertical groove that extends forward from an end of the first horizontal groove on one side in the circumferential direction, and a front end of the second vertical groove. a second lateral groove extending from the rear end of the first longitudinal groove to one side in the circumferential direction, an inclined groove extending forward as it moves from the rear end of the first longitudinal groove to one side in the circumferential direction, and a third longitudinal groove extending forward from the end of the inclined groove on one side in the circumferential direction and communicating with the end of the second lateral groove on one side in the circumferential direction, wherein the push button and the plunger retainer are respectively formed with a first sliding contact portion and a second sliding contact portion which are in sliding contact with each other, and the push button is pushed forward and the guide projection reaches the front end of the first longitudinal groove, and the first sliding contact portion and the second sliding contact portion are in sliding contact with each other until the push button is pushed forward and the guide projection reaches the front end of the first longitudinal groove the plunger retainer is moved to one side in the circumferential direction relative to the push button, the guide protrusion in the first vertical groove enters the first horizontal groove, the push of the push button is released, the rearward biasing force of the biasing member causes the guide protrusion in the first horizontal groove to abut against the rear end surface of the first horizontal groove and slide along the rear end surface of the first horizontal groove toward one side in the circumferential direction, the plunger retainer is moved to one side in the circumferential direction relative to the push button, the guide protrusion in the first horizontal groove faces the second vertical groove in the front-to-rear direction, the push button is pushed forward, and the guide protrusion in the second vertical groove,Before reaching the front end of the second longitudinal groove, the first sliding contact portion and the second sliding contact portion slide against each other, thereby moving the plunger holder to one side in the circumferential direction relative to the push button, causing the guide protrusion in the second longitudinal groove to enter the second lateral groove, the push button is released, the rearward biasing force of the biasing member causes the guide protrusion in the second lateral groove to abut against the rear end surface of the second lateral groove and slide against the rear end surface of the second lateral groove toward one side in the circumferential direction, moving the plunger holder to one side in the circumferential direction relative to the push button, causing the guide protrusion in the second lateral groove to abut against or approach the end surface of the second lateral groove on one side in the circumferential direction, the push button is pushed forward, and the guide protrusion in the second lateral groove moves forward. When the push button is released, the first sliding contact portion and the second sliding contact portion slide against each other, moving the plunger retainer to one side in the circumferential direction relative to the push button, causing the guide protrusion in the second lateral groove to enter the connection portion between the second lateral groove and the third longitudinal groove, and the rearward biasing force of the biasing member causes the guide protrusion in the connection portion between the second lateral groove and the third longitudinal groove to abut against the rear end surface of the connection portion between the second lateral groove and the third longitudinal groove, causing the rear end surface of the connection portion between the second lateral groove and the third longitudinal groove to slide toward one side in the circumferential direction, moving the plunger retainer to one side in the circumferential direction relative to the push button, and causing the guide protrusion in the connection portion between the second lateral groove and the third longitudinal groove to enter the third longitudinal groove.

[0007] When the push button is moved forward together with the plunger retainer against the rearward biasing force of the biasing member, the plunger moves forward into the syringe while the guide protrusion of the plunger retainer moves forward within the first vertical groove until it abuts against the front end surface of the inner surface of the first vertical groove, thereby discharging a specified amount of the content liquid from the discharge hole of the syringe. When the push button is pushed forward and the guide protrusion reaches the front end of the first longitudinal groove, the first sliding contact portion and the second sliding contact portion slide against each other, causing the plunger retainer to move to one side in the circumferential direction relative to the push button and the guide protrusion in the first longitudinal groove to enter the first lateral groove. When the push button is released, the rearward biasing force of the biasing member causes the guide protrusion to abut against the rear end surface of the inner surface of the first lateral groove, sliding the rear end surface of the first lateral groove to one side in the circumferential direction, moving the plunger retainer to one side in the circumferential direction relative to the push button and causing the guide protrusion in the first lateral groove to face the second longitudinal groove in the front-to-rear direction. That is, when the push button is pressed for the first time, the guide protrusion still faces the front end face of the first vertical groove in the front-to-rear direction, preventing the content liquid from being discharged, and it is only when the push button is released that the guide protrusion faces the second vertical groove in the front-to-rear direction, allowing the content liquid to be discharged. This makes it possible to prevent an excessive amount of content liquid from being discharged when the push button is pressed for the first time. Then, when the push button is again moved forward together with the plunger retainer against the rearward biasing force of the biasing member, the guide protrusion of the plunger retainer moves forward within the second vertical groove, while the plunger moves forward into the syringe, causing a specified amount of liquid content to be ejected from the syringe's ejection hole. When the push button is pushed forward and the guide protrusion in the second longitudinal groove reaches the front end of the second longitudinal groove, the first sliding contact portion and the second sliding contact portion slide against each other, causing the plunger retainer to move to one circumferential side relative to the push button and the guide protrusion in the second longitudinal groove to enter the second lateral groove. When the push button is released, the rearward biasing force of the biasing member causes the guide protrusion to abut against the rear end face of the second lateral groove and slide against the rear end face of the second lateral groove to one circumferential side, moving the plunger retainer to one circumferential side relative to the push button and bringing the guide protrusion in the second lateral groove into contact with or close to the end face of the second lateral groove on one side in the circumferential direction. When the push button is again moved forward together with the plunger retainer against the rearward biasing force of the biasing member, the guide protrusion in the second lateral groove moves forward while the first sliding contact portion and the second sliding contact portion slide against each other, causing the plunger retainer to move to one side in the circumferential direction relative to the push button, and the guide protrusion in the second lateral groove enters the connection portion between the second lateral groove and the third longitudinal groove. When the push button is released, the rearward biasing force of the biasing member causes the guide protrusion in the connection portion between the second lateral groove and the third longitudinal groove to abut against the rear end surface of the connection portion between the second lateral groove and the third longitudinal groove, causing the rear end surface of the connection portion between the second lateral groove and the third longitudinal groove to slide to one side in the circumferential direction, causing the plunger retainer to move to one side in the circumferential direction relative to the push button, and the guide protrusion in the connection portion between the second lateral groove and the third longitudinal groove enters the third longitudinal groove. Then, due to the rearward biasing force of the biasing member, the guide protrusion moves rearward within the third longitudinal groove, enters one circumferential end of the inclined groove, and slides along the rear end face of the inclined groove toward the other circumferential side, causing the plunger retainer to move toward the other circumferential side relative to the push button, and the guide protrusion reaches the rear end of the first longitudinal groove, thereby returning the push button and plunger retainer to their retracted end positions before being pushed in. The syringe container auxiliary device is equipped with a main body tube that is attached to the syringe and a plunger presser that pushes the plunger forward, so it can be attached to current syringe containers that can completely discharge the liquid content in the syringe with one push. As described above, a specified amount of the liquid content can be ejected stepwise multiple times using the current syringe container. The guide groove has a first vertical groove, a first horizontal groove, a second vertical groove, a second horizontal groove, a third vertical groove, and an inclined groove, and is annular in a front view from the radial direction. After the liquid content in the syringe has been discharged, the guide protrusion passes through the second horizontal groove, the third vertical groove, and the inclined groove, causing the push button and plunger retainer to return to the retracted end position they were in before being pushed in. Therefore, after removing this syringe container auxiliary device from the syringe container, it can be reused by attaching it to a new syringe container in which the liquid content has been filled.

[0008] The main body tube may comprise an outer tube attached to the syringe and an inner tube fixed within the outer tube, the inner tube having a radially penetrating through hole formed therein, the inner peripheral surface of the outer tube having a protrusion inserted into the through hole, and the guide groove being defined by a gap between the inner surface of the through hole and the protrusion.

[0009] Since the guide groove is defined by the gap between the inner surface of the through hole formed in the inner tube and the protrusion formed on the inner surface of the outer tube, it is easy to obtain a guide groove that is annular when viewed from the front in the radial direction.

[0010] A rear end surface of the first longitudinal groove may be located rearward of the inclined groove.

[0011] Since the rear end face of the first vertical groove is located rearward of the inclined groove, the push button and plunger retainer are positioned at the rear end position, and the guide protrusion located at the rear end of the first vertical groove can be restricted from moving circumferentially relative to the main body tube.

[0012] The plunger retainer may include a support portion that supports the rear end portions of the plunger and the urging member, and a rotating portion that has the guide protrusion and the second sliding contact portion and is rotatably arranged relative to the support portion.

[0013] Since the plunger retainer is equipped with a support portion and a rotating portion, as described above, when the first sliding contact portion of the push button and the second sliding contact portion of the plunger retainer are brought into sliding contact with each other, the support portion of the plunger retainer does not rotate, and only the rotating portion can move circumferentially relative to the push button, thereby preventing twisting of the urging member. [Effects of the Invention]

[0014] According to the above aspect of the present invention, a specified amount of the liquid content can be ejected stepwise multiple times using an existing syringe container. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a longitudinal sectional view of a syringe container with an assisting device shown as one embodiment. [Figure 2] FIG. 2 is an explanatory diagram illustrating a main part of the assisting tool shown in FIG. [Figure 3] FIG. 3 is a view showing a state in which the guide protrusion has reached the front end of the first longitudinal groove in FIG. 2. [Figure 4] 3 is a view showing a state in which the guide protrusion abuts against the rear end surface of the first transverse groove in FIG. 2. FIG. [Figure 5] FIG. 3 is a view showing a state in which the guide protrusion has reached the front end of the second longitudinal groove in FIG. 2. [Figure 6] 3 is a view showing a state in which the guide protrusion abuts against the rear end surface of the second transverse groove in FIG. 2. FIG. [Figure 7] 3 is a view showing a state in which the guide protrusion in the second transverse groove in FIG. 2 has moved forward. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, an auxiliary tool 1 for a syringe container according to one embodiment will be described with reference to the drawings. First, the syringe container 50 will be described. Syringe container 50 includes syringe 51 having a discharge hole 53 for the liquid content, and plunger 52 slidably fitted within syringe 51. Syringe 51 and plunger 52 are arranged coaxially on a common axis.

[0017] Hereinafter, this common axis will be referred to as axis O, the side of discharge hole 53 along axis O will be referred to as the front side, the opposite side will be referred to as the rear side, and the direction along axis O will be referred to as the front-to-rear direction. A direction that intersects axis O as viewed from the front-to-rear direction will be referred to as the radial direction, and a direction that rotates around axis O as viewed from the front-to-rear direction will be referred to as the circumferential direction.

[0018] A discharge hole 53 is formed at the front end of the syringe 51, and the discharge hole 53 opens forward. A first flange portion 54 is formed at the rear end of the syringe 51, protruding radially outward and extending continuously around the entire circumference. The plunger 52 protrudes rearward from the syringe 51 and is provided so as to be movable forward. The rear end of the plunger 52 is formed in a flat plate shape with its front and back surfaces facing in the front-rear direction.

[0019] Next, a syringe container auxiliary tool (hereinafter simply referred to as auxiliary tool) 1 attached to the syringe container 50 will be described. The assisting tool 1 includes a main body tube 11, a push button 12, a plunger retainer 13, and a biasing member 14.

[0020] The main body cylinder 11 is detachably attached to the syringe 51 and extends rearward from the syringe 51. The main body cylinder 11 surrounds the rear portion of the plunger 52 that protrudes rearward from the syringe 51 from the radially outer side over the entire length in the front-to-rear direction. The main body cylinder 11 has an outer cylinder 21 and an inner cylinder 22 .

[0021] The outer tube 21 is attached to the syringe 51 and extends rearward from the first flange portion 54 of the syringe 51. The first flange portion 54 is inserted into the front end of the outer tube 21. The front end of the outer tube 21 is formed with an outer flange portion 21a that protrudes radially outward and an inner flange portion 21b that protrudes radially inward. The outer flange portion 21a and the inner flange portion 21b each extend continuously around the entire circumference. The outer flange portion 21a is located forward of the inner flange portion 21b. The front surface of the outer flange portion 21a is located at the same front-to-rear position as the front surface of the first flange portion 54 of the syringe 51. The front surface of the inner flange portion 21b abuts against the rear surface of the first flange portion 54. An annular protrusion 21c that protrudes rearward and extends continuously around the entire circumference is formed at the radially inner end of the inner flange portion 21b. The radially inner portion of the annular protrusion 21c protrudes further rearward than the radially outer portion.

[0022] In the illustrated example, the assisting device 1 is provided with a locking member 15 . Locking member 15 sandwiches the rear surface of outer flange portion 21a of outer cylinder 21 and the front surfaces of outer flange portion 21a and first flange portion 54 in the front-rear direction, and detachably fixes main body cylinder 11 to syringe 51. Locking member 15 is formed in an annular shape with a portion cut out in the circumferential direction so as to open in one radial direction. Locking member 15 can be attached to and detached from main body cylinder 11 and syringe 51 by moving locking member 15 in one radial direction and in the opposite radial direction relative to main body cylinder 11 and syringe 51.

[0023] The inner cylinder 22 is fitted and fixed inside the outer cylinder 21. A second flange portion 22a is formed at the rear end of the inner cylinder 22, protruding radially outward and extending continuously around the entire circumference. The second flange portion 22a is disposed at the rear end opening edge of the outer cylinder 21. The front end opening edge of the inner cylinder 22 abuts against or is close to the rear surface of the inner flange portion 21b of the outer cylinder 21.

[0024] Here, a first guide groove 23 and a second guide groove (guide groove) 24 are formed in the main body tube 11. The first guide groove 23 and the second guide groove 24 are provided at different circumferential positions. A plurality of the first guide grooves 23 and a plurality of the second guide grooves 24 are provided at intervals in the circumferential direction.

[0025] The first guide groove 23 extends straight in the front-rear direction over the entire length in the front-rear direction. As shown in Figure 2, the second guide groove 24 includes a first longitudinal groove 31 extending in the front-to-rear direction, a first lateral groove 32 extending from the front end of the first longitudinal groove 31 to one circumferential side A, a second longitudinal groove 33 extending forward from the end of the first lateral groove 32 on the one circumferential side A, a second lateral groove 37 extending from the front end of the second longitudinal groove 33 to the one circumferential side A, an inclined groove 38 extending forward from the rear end of the first longitudinal groove 31 toward the one circumferential side A, and a third longitudinal groove 39 extending forward from the end of the inclined groove 38 on the one circumferential side A and communicating with the end of the second lateral groove 37 on the one circumferential side A.

[0026] A front end face 31a of the inner surface of the first longitudinal groove 31 and a front end face 33a of the inner surface of the second longitudinal groove 33 extend straight in the circumferential direction. A rear end face 31b of the inner surface of the first longitudinal groove 31, a rear end face 32a of the inner surface of the first lateral groove 32, and a rear end face 37a of the inner surface of the second lateral groove 37 extend rearward toward one side A in the circumferential direction. The rear end surface 31b of the first longitudinal groove 31 is located rearward of the inclined groove 38. The rear end portion of the first longitudinal groove 31 is defined by the rear end surface 31b and both side surfaces extending downward from both circumferential ends of the rear end surface 31b. A front portion of an end portion of the second lateral groove 37 on one circumferential side A communicates with the third longitudinal groove 39. A rear end face 37c at the connection portion between the second lateral groove 37 and the third longitudinal groove 39 extends rearward as it approaches the circumferential side A. An end face 37b at the one circumferential side A of the second lateral groove 37 extends forward from an end portion of the rear end face 37a of the second lateral groove 37 on the one circumferential side A and is connected to an end portion on the other circumferential side B of the rear end face 37c at the connection portion between the second lateral groove 37 and the third longitudinal groove 39.

[0027] The first guide groove 23 penetrates the inner cylinder 22 in the radial direction. Here, a through hole 22b penetrating radially is formed in the inner cylinder 22 at a position circumferentially spaced from the first guide groove 23, and a protrusion 21d inserted into the through hole 22b is formed on the inner peripheral surface of the outer cylinder 21. The protrusion 21d is spaced from the inner surface of the through hole 22b over the entire circumference. The second guide groove 24 is defined by a gap between the inner surface of the through hole 22b and the protrusion 21d, and has an annular shape when viewed from the front in the radial direction. In the illustrated example, the second guide groove 24 is open toward the front.

[0028] The biasing member 14 supports the push button 12 and the plunger retainer 13 in a rearward biasing state so that they can move forward. The biasing member 14 is, for example, a coil spring extending in the front-rear direction and is arranged coaxially with the axis O. The biasing member 14 is housed in the inner cylinder 22. The front end opening edge of the biasing member 14 is supported by the rear surface of the radially outer portion of the annular protrusion 21c. The radially inner portion of the annular protrusion 21c is inserted into the front end of the biasing member 14. The rear end of the biasing member 14 is supported by the plunger retainer 13.

[0029] The push button 12 protrudes rearward from the main body tube 11 and is provided so as to be movable forward. The push button 12 is provided so as to be movable forward while its rotational movement in the circumferential direction relative to the main body tube 11 is restricted. In the illustrated example, a first guide protrusion 25 that protrudes radially outward is formed on the outer peripheral surface of the front end of the push button 12. The first guide protrusion 25 is inserted into the first guide groove 23 so as to be movable back and forth while its movement in the circumferential direction is restricted. The first guide protrusion 25 is formed in the shape of a rectangular parallelepiped that is long in the front-to-rear direction.

[0030] The plunger retainer 13 is linked to the forward and backward movement of the push button 12 and pushes the plunger 52 forward. The plunger retainer 13 protrudes forward from the push button 12. The plunger retainer 13 is formed with a second guide protrusion (guide protrusion) 26 that protrudes radially outward. The second guide protrusion 26 is movably inserted into the second guide groove 24 of the main body tube 11. The second guide protrusion 26 is located at the rear end of the first vertical groove 31 of the second guide groove 24. The second guide protrusion 26 is formed in the shape of a rectangular parallelepiped that is long in the forward and backward directions. A rear end surface 26a of the second guide protrusion 26 extends rearward as it moves toward one side A in the circumferential direction.

[0031] As shown in FIG. 2, the push button 12 and the plunger retainer 13 are respectively formed with a first sliding contact portion 27 and a second sliding contact portion 28 that are in sliding contact with each other.

[0032] The first sliding contact portion 27 protrudes forward from the edge of the front end opening of the push button 12. The first sliding contact portion 27 is formed in a plate shape with its front and back surfaces facing radially. The front and back surfaces of the first sliding contact portion 27 are connected to the inner and outer circumferential surfaces of the push button 12 without any steps in the front-to-rear direction. The first sliding contact portion 27 has an isosceles triangular shape that points forward when viewed from the front radially. The first sliding contact portion 27 has side surfaces facing diagonally forward at portions corresponding to the equilateral parts that define the isosceles triangular shape. Of these two side surfaces, the side surface located on one circumferential side A (hereinafter referred to as the first sliding contact surface 27a) extends forward as it approaches the other circumferential side B, and the side surface located on the other circumferential side B (hereinafter referred to as the second sliding contact surface 27b) extends rearward as it approaches the other circumferential side B. A plurality of first sliding contact portions 27 are provided and connected in a circumferential direction. The plurality of first sliding contact portions 27 are provided around the entire periphery of the front end opening edge of the push button 12.

[0033] The second sliding contact portion 28 protrudes radially outward from the outer peripheral surface of the plunger retainer 13. The second sliding contact portion 28 has an isosceles triangular shape that is pointed rearward in a radial front view. The second sliding contact portion 28 has side surfaces facing diagonally rearward at portions corresponding to the equilateral portions that define the isosceles triangular shape. Of these two side surfaces, the side surface located on one circumferential side A (hereinafter referred to as the third sliding contact surface 28a) extends rearward as it approaches the other circumferential side B, and the side surface located on the other circumferential side B (hereinafter referred to as the fourth sliding contact surface 28b) extends forward as it approaches the other circumferential side B. A plurality of second sliding contact portions 28 are provided in a circumferential direction. The plurality of second sliding contact portions 28 are provided around the entire outer peripheral surface of the plunger retainer 13. The second sliding contact portions 28 are formed to have a shape that is front-to-back inverted with respect to the first sliding contact portion 27 and are the same size.

[0034] The rear end surface 26a of the second guide projection 26 is connected to the fourth sliding contact surface 28b without any step in the radial direction along the entire length. The rear end surface 26a of the second guide projection 26 and the fourth sliding contact surface 28b have the same length (in the direction intersecting the circumferential direction and the front-rear direction). The first sliding contact surface 27a of the first sliding contact portion 27 and the fourth sliding contact surface 28b of the second sliding contact portion 28 are in contact with or close to each other, and the second sliding contact surface 27b of the first sliding contact portion 27 is separated from the third sliding contact surface 28a of the second sliding contact portion 28 to one side A in the circumferential direction.

[0035] In the above configuration, when the push button 12 is pushed forward and the second guide protrusion 26 reaches the front end of the first vertical groove 31, as shown in Figure 3, the first sliding surface 27a of the first sliding portion 27 and the fourth sliding surface 28b of the second sliding portion 28 slide against each other, causing the plunger holder 13 to move circumferentially to one side A relative to the push button 12, and the second guide protrusion 26 in the first vertical groove 31 enters the first lateral groove 32. At this time, when the push button 12 is released from being pressed, the rearward biasing force of the biasing member 14 causes the second guide protrusion 26 in the first lateral groove 32 to abut against the rear end face 32a of the first lateral groove 32, and as shown in Figure 4, the rear end face 32a of the first lateral groove 32 slides toward one circumferential side A, and the plunger retainer 13 moves toward one circumferential side A relative to the push button 12, and the second guide protrusion 26 in the first lateral groove 32 faces the second vertical groove 33 in the front-to-rear direction.

[0036] Then, when the push button 12 is pushed forward and the second guide protrusion 26 in the second vertical groove 33 reaches the front end of the second vertical groove 33, as shown in Figure 5, the first sliding surface 27a of the first sliding portion 27 and the fourth sliding surface 28b of the second sliding portion 28 slide against each other, causing the plunger holder 13 to move circumferentially to one side A relative to the push button 12, and the second guide protrusion 26 in the second vertical groove 33 enters the second lateral groove 37. At this time, when the push button 12 is released from being pressed, the rearward biasing force of the biasing member 14 causes the second guide protrusion 26 to abut against the rear end face 37a of the second lateral groove 37 and slide along the rear end face 37a of the second lateral groove 37 toward one circumferential side A, causing the plunger retainer 13 to move toward one circumferential side A relative to the push button 12, and the second guide protrusion 26 in the second lateral groove 37 to abut against or come close to the end face 37b of the second lateral groove 37 on one circumferential side A.

[0037] Then, when the push button 12 is again moved forward together with the plunger retainer 13 against the rearward biasing force of the biasing member 14, the second guide protrusion 26 in the second lateral groove 37 moves forward, and as shown in Figure 7, the first sliding contact surface 27a of the first sliding contact portion 27 and the fourth sliding contact surface 28b of the second sliding contact portion 28 slide against each other, causing the plunger retainer 13 to move to one circumferential side A relative to the push button 12, and the second guide protrusion 26 in the second lateral groove 37 enters the connection portion between the second lateral groove 37 and the third longitudinal groove 39. At this time, when the push button 12 is released from being pressed, the rearward biasing force of the biasing member 14 causes the second guide protrusion 26 in the connection portion between the second lateral groove 37 and the third vertical groove 39 to abut against the rear end face 37c at the connection portion between the second lateral groove 37 and the third vertical groove 39, causing the rear end face 37c at the connection portion between the second lateral groove 37 and the third vertical groove 39 to slide toward one circumferential side A, and the plunger retainer 13 moves toward one circumferential side A relative to the push button 12, and the second guide protrusion 26 in the connection portion between the second lateral groove 37 and the third vertical groove 39 enters the third vertical groove 39.

[0038] In this embodiment, as shown in FIG. 1, the plunger presser 13 includes a support portion 34 that supports the rear end portions of the plunger 52 and the urging member 14, and a rotating portion 35 that has a second guide protrusion 26 and a second sliding contact portion 28 and is rotatable relative to the support portion 34. The support portion 34 and the rotating portion 35 are each formed in a cylindrical shape with a top. The support portion 34 is inserted into the rotating portion 35 so as to be rotatable relative to the rotating portion 35 in the circumferential direction.

[0039] A third flange portion 34a extending continuously around the entire circumference is formed at the front end of the support portion 34. The outer peripheral surface of the third flange portion 34a abuts against or is close to the inner peripheral surface of the inner cylinder 22. A cylindrical portion 34b protruding forward is formed at the front surface of the third flange portion 34a. The rear end of the plunger 52 is inserted into the cylindrical portion 34b. The rear end of the urging member 14 is fitted to the cylindrical portion 34b. The rear end opening edge of the urging member 14 is supported by the front surface of the third flange portion 34a.

[0040] A strip-shaped protrusion 36 is formed on the outer peripheral surface of the front end of the rotating part 35, protruding radially outward and extending continuously around the entire circumference. The protrusion 36 is sandwiched in the front-to-rear direction between the front-end opening edge of the push button 12 and the rear surface of the third flange part 34a of the support part 34. A second sliding contact part 28 is formed at the rear end of the protrusion 36. A second guide protrusion 26 is formed on the outer peripheral surface of the protrusion 36. The second guide protrusion 26 is provided over the entire length of the outer peripheral surface of the protrusion 36 in the front-to-rear direction.

[0041] Next, the operation of the syringe container auxiliary tool 1 configured as above will be described.

[0042] When the push button 12 is moved forward together with the plunger retainer 13 against the rearward biasing force of the biasing member 14, the second guide protrusion 26 of the plunger retainer 13 moves forward within the first vertical groove 31 until it abuts against the front end face 31a of the first vertical groove 31, and the plunger 52 moves forward into the syringe 51. As a result, a specified amount of the content liquid is discharged from the discharge hole 53 of the syringe 51.

[0043] Before the second guide protrusion 26 of the plunger retainer 13 reaches the front end surface 31a of the first vertical groove 31, the first sliding contact surface 27a of the first sliding contact portion 27 of the push button 12 and the fourth sliding contact surface 28b of the second sliding contact portion 28 of the plunger retainer 13 are in sliding contact with each other. As a result, as shown in FIG. 3 , the push button 12 advances relative to the plunger retainer 13, and the plunger retainer 13 moves to one circumferential side A relative to the push button 12, causing the second guide protrusion 26 to enter the first lateral groove 32. In the illustrated example, when the second guide protrusion 26 moves forward from the rear end of the first longitudinal groove 31 and reaches the opening of the inclined groove 38 in the first longitudinal groove 31, and the restriction on the movement of the second guide protrusion 26 toward the one circumferential side A is released, the first sliding contact surface 27a and the fourth sliding contact surface 28b slide against each other, and the second guide protrusion 26 moves toward the one circumferential side A. At this time, a guide surface 31c that faces rearward and extends rearward as it approaches the one circumferential side A is provided at the front end of the connection between the first longitudinal groove 31 and the inclined groove 38, and the front end face of the second guide protrusion 26 that moves forward from the rear end of the first longitudinal groove 31 abuts against the guide surface 31c and slides on the guide surface 31c toward the other circumferential side B, returning to the same circumferential position as when it was located at the rear end of the first longitudinal groove 31, and then continues to move forward along the first longitudinal groove 31. Thereafter, when the second guide protrusion 26 reaches the opening of the first lateral groove 32 in the first longitudinal groove 31 and the restriction on the movement of the second guide protrusion 26 toward one circumferential side A is released again, the first sliding contact surface 27a and the fourth sliding contact surface 28b slide against each other, and the second guide protrusion 26 moves toward one circumferential side A and enters the first lateral groove 32.

[0044] In this case, in the illustrated example, the first sliding contact portion 27 and the second sliding contact portion 28 are formed to have shapes that are inverted from front to back and are the same size, so that the first sliding contact portion 27 and the second sliding contact portion 28 interlock circumferentially over the entire circumference, thereby restricting the relative circumferential movement of the push button 12 and the plunger retainer 13. Furthermore, at this time, the rotating portion 35 of the plunger retainer 13 moves to one side A in the circumferential direction relative to the support portion 34. Furthermore, at this time, a portion of the second guide protrusion 26 on one circumferential side A faces the rear end surface 32a of the first lateral groove 32 in the front-rear direction. Note that at this time, the second guide protrusion 26 may face the rear end surface 32a of the first lateral groove 32 in the front-rear direction over the entire circumferential length thereof.

[0045] Next, when the push button 12 is released from the depressed position, the rearward biasing force of the biasing member 14 causes the second guide protrusion 26 to abut against the rear end surface 32a of the first lateral groove 32, and as shown in Fig. 4, the second guide protrusion 26 slides along the rear end surface 32a of the first lateral groove 32 toward one circumferential side A. As a result, the plunger presser 13 moves toward one circumferential side A relative to the push button 12, and the second guide protrusion 26 faces the second longitudinal groove 33 in the front-to-rear direction over the entire circumferential length. At this time, the fourth sliding contact surface 28b of the second sliding contact portion 28 moves away from the first sliding contact surface 27a of the first sliding contact portion 27 toward one circumferential side A, while the third sliding contact surface 28a of the second sliding contact portion 28 slides over the second sliding contact surface 27b of the first sliding contact portion 27 toward one circumferential side A, so that the fourth sliding contact surface 28b abuts against or comes close to the first sliding contact surface 27a of the other first sliding contact portion 27, and the third sliding contact surface 28a moves away from the second sliding contact surface 27b of the other first sliding contact portion 27 toward the other circumferential side B.

[0046] Then, when the push button 12 is again moved forward together with the plunger retainer 13 against the rearward biasing force of the biasing member 14, the second guide protrusion 26 of the plunger retainer 13 moves forward within the second vertical groove 33 until it abuts against the front end surface 33a of the second vertical groove 33, and the plunger 52 moves forward into the syringe 51. As a result, a specified amount of the content liquid is discharged from the discharge hole 53 of the syringe 51.

[0047] Before the second guide protrusion 26 of the plunger retainer 13 reaches the front end surface 33a of the second vertical groove 33, the first sliding contact surface 27a of the first sliding contact portion 27 of the push button 12 and the fourth sliding contact surface 28b of the second sliding contact portion 28 of the plunger retainer 13 are in sliding contact with each other. As a result, as shown in FIG. 5 , the push button 12 advances relative to the plunger retainer 13, and the plunger retainer 13 moves to one side A in the circumferential direction relative to the push button 12, causing the second guide protrusion 26 to enter the second lateral groove 37. In the illustrated example, when the second guide protrusion 26 reaches the opening of the second lateral groove 37 in the second longitudinal groove 33 and the restriction on the movement of the second guide protrusion 26 toward one circumferential side A is released, the first sliding contact surface 27a and the fourth sliding contact surface 28b slide against each other, and the second guide protrusion 26 moves toward one circumferential side A and enters the second lateral groove 37.

[0048] At this time, similarly to the above, the first sliding contact portion 27 and the second sliding contact portion 28 mesh with each other in the circumferential direction over the entire circumference, and the rotating portion 35 of the plunger retainer 13 moves to one side A in the circumferential direction relative to the support portion 34. Furthermore, at this time, a portion of the second guide protrusion 26 on one circumferential side A faces in the front-rear direction a portion of the rear end face 37a of the second lateral groove 37 on the other circumferential side B. Note that at this time, the second guide protrusion 26 may face in the front-rear direction with the rear end face 37a of the second lateral groove 37 over the entire circumferential length.

[0049] Next, when the push button 12 is released from the depressed position, the rearward biasing force of the biasing member 14 causes the second guide protrusion 26 to abut against the rear end surface 37a of the second lateral groove 37, and as shown in Fig. 6, the second guide protrusion 26 slides along the rear end surface 37a of the second lateral groove 37 toward one circumferential side A. As a result, the plunger presser 13 moves toward one circumferential side A relative to the push button 12, and the second guide protrusion 26 is positioned within the second lateral groove 37 over the entire circumferential length. At this time, the fourth sliding contact surface 28b of the second sliding contact portion 28 moves away from the first sliding contact surface 27a of the first sliding contact portion 27 toward one circumferential side A, while the third sliding contact surface 28a of the second sliding contact portion 28 slides over the second sliding contact surface 27b of the first sliding contact portion 27 toward one circumferential side A, so that the fourth sliding contact surface 28b abuts against or comes close to the first sliding contact surface 27a of the other first sliding contact portion 27, and the third sliding contact surface 28a moves away from the second sliding contact surface 27b of the other first sliding contact portion 27 toward the other circumferential side B.

[0050] Next, the locking member 15 is moved in the other radial direction relative to the main body tube 11 and the syringe 51 to separate the assisting tool 1 from the syringe container 50. In this case, the rear end face 37a of the second lateral groove 37 extends rearward as it moves toward one side A in the circumferential direction, and since the second lateral groove 37 has an end face 37b on one side A in the circumferential direction, the second guide protrusion 26 located within the second lateral groove 37 is prevented from moving circumferentially relative to the main body tube 11.

[0051] Thereafter, when the push button 12 is again moved forward together with the plunger retainer 13 by the auxiliary part 1 alone against the rearward biasing force of the biasing member 14, the second guide protrusion 26 of the plunger retainer 13 moves forward within the second lateral groove 37, causing the first sliding contact surface 27a of the first sliding contact portion 27 and the fourth sliding contact surface 28b of the second sliding contact portion 28 to come into sliding contact with each other. As a result, as shown in FIG. 7 , the push button 12 advances relative to the plunger retainer 13, and the plunger retainer 13 moves to one side A in the circumferential direction relative to the push button 12, causing the second guide protrusion 26 in the second lateral groove 37 to enter the connection portion with the third longitudinal groove 39.

[0052] Next, when the push button 12 is released from the depressed position, the rearward biasing force of the biasing member 14 causes the second guide protrusion 26 to abut against the rear end face 37c at the connection portion between the second lateral groove 37 and the third longitudinal groove 39, and as shown by the dotted line in Figure 7, the second guide protrusion 26 slides along the rear end face 37c at the connection portion between the second lateral groove 37 and the third longitudinal groove 39 toward one circumferential side A, and enters the third longitudinal groove 39 over its entire circumferential length.

[0053] Thereafter, due to the rearward biasing force of the biasing member 14, the second guide protrusion 26 moves rearward within the third vertical groove 39 and enters the end of the inclined groove 38 on one circumferential side A. The rear end surface 38a of the inclined groove 38 slides toward the other circumferential side B, causing the plunger retainer 13 to move toward the other circumferential side B relative to the push button 12, and the second guide protrusion 26 reaches the rear end of the first vertical groove 31. As a result, the push button 12 and the plunger retainer 13 return to their retracted end positions before being pushed in. At this time, the fourth sliding contact surface 28b is in contact with or close to the first sliding contact surface 27a of the first sliding contact portion 27, and the third sliding contact surface 28a is separated from the second sliding contact surface 27b of the first sliding contact portion 27 toward the other circumferential side B. As the second guide protrusion 26 slides along the rear end surface 38a of the inclined groove 38 toward the other circumferential side B, the second sliding contact portion 28 slides over the multiple first sliding contact portions 27 while coming into sliding contact with them.

[0054] As described above, the auxiliary device 1 for a syringe container according to this embodiment is provided with the main body tube 11 that is attached to the syringe 51 and the plunger presser 13 that pushes the plunger 52 forward, so that the auxiliary device 1 for a syringe container can be attached to a current syringe container 50 that can completely eject the liquid contents in the syringe 51 with a single push, and the current syringe container 50 can be used to eject a specified amount of the liquid contents in stages multiple times.

[0055] When the push button 12 is pressed for the first time, as shown in Figure 3, the second guide protrusion 26 is still facing the front end face 31a of the first vertical groove 31 in the front-to-back direction, preventing the content liquid from being ejected. It is only when the push button 12 is released from the depression that the second guide protrusion 26 faces the second vertical groove 33 in the front-to-back direction over the entire circumferential length, as shown in Figure 4, allowing the content liquid to be ejected. This prevents an excessive amount of liquid from being discharged when the push button 12 is pressed for the first time.

[0056] The second guide groove 24 has a first vertical groove 31, a first horizontal groove 32, a second vertical groove 33, a second horizontal groove 37, a third vertical groove 39, and an inclined groove 38, and is annular in a front view seen from the radial direction. After the liquid content in the syringe 51 has been discharged, the second guide protrusion 26 is passed through the second horizontal groove 37, the third vertical groove 39, and the inclined groove 38, whereby the push button 12 and the plunger presser 13 return to the retracted end position they had before being pushed in. Therefore, after removing the syringe container auxiliary device 1 from the syringe container 50, it can be reused by attaching it to a new syringe container 50 in which the liquid content has been filled in the syringe 51.

[0057] Since the second guide groove 24 is defined by the gap between the inner surface of the through hole 22b formed in the inner tube 22 and the protrusion 21d formed on the inner surface of the outer tube 21, it is easy to obtain a second guide groove 24 that is annular when viewed from the front in the radial direction.

[0058] Since the rear end surface 31b of the first vertical groove 31 is located rearward of the inclined groove 38, the push button 12 and plunger retainer 13 are located at the rear end position, and the second guide protrusion 26 located at the rear end of the first vertical groove 31 can be restricted from moving circumferentially relative to the main body tube 11.

[0059] Since the plunger retainer 13 is equipped with a support portion 34 and a rotating portion 35, as described above, when the first sliding contact portion 27 of the push button 12 and the second sliding contact portion 28 of the plunger retainer 13 are brought into sliding contact with each other, it becomes possible to move only the rotating portion 35 of the plunger retainer 13 to one circumferential side A relative to the push button 12 without rotating the support portion 34, thereby preventing twisting of the urging member 14.

[0060] The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

[0061] For example, a configuration may be adopted in which a plurality of second longitudinal grooves 33 are provided in the front-rear direction, and a specified amount of the liquid content is ejected in stages over three or more times using the current syringe container 50. A configuration may be adopted in which an elastic member is provided between the push button 12 and the plunger retainer 13, and the push button 12 is supported so as to be movable forward relative to the plunger retainer 13 while being biased backward.

[0062] In addition, within the scope of the spirit of the present invention, it is possible to replace the components in the above-described embodiments with well-known components as appropriate, and the above-described embodiments and the above-described variations may be combined as appropriate.

[0063] The aspects of the present invention are as follows, for example. <1> A syringe container auxiliary tool is attached to a syringe container having a syringe extending in the front-rear direction and having a discharge hole for a liquid content, and a plunger protruding rearward from the syringe and provided so as to be movable forward, a main body cylinder detachably attached to the syringe and extending rearward; a push button that protrudes rearward from the main body tube and is movable forward; a plunger presser that pushes the plunger forward in response to the back and forth movement of the push button; a biasing member that supports the push button and the plunger presser in a rearward biased state so as to be movable forward, the push button is provided so as to be movable forward while its rotational movement in the circumferential direction relative to the main body tube is restricted, The plunger retainer is formed with a guide projection that projects radially outward, The main body tube is formed with a guide groove into which the guide protrusion is movably inserted, The guide groove is a first longitudinal groove extending in the front-rear direction; a first lateral groove extending from a front end of the first longitudinal groove to one side in the circumferential direction; a second longitudinal groove extending forward from one circumferential end of the first transverse groove; a second lateral groove extending from a front end of the second longitudinal groove to one side in the circumferential direction; an inclined groove extending forward from a rear end of the first longitudinal groove toward one side in the circumferential direction; a third longitudinal groove extending forward from one circumferential end of the inclined groove and communicating with one circumferential end of the second lateral groove, The push button and the plunger retainer are respectively formed with a first sliding contact portion and a second sliding contact portion that are in sliding contact with each other, When the push button is pushed forward, the first sliding contact portion and the second sliding contact portion slide against each other until the guide protrusion reaches the front end of the first vertical groove, thereby moving the plunger presser toward one side in the circumferential direction relative to the push button and causing the guide protrusion in the first vertical groove to enter the first horizontal groove, When the push button is released from the depressed position, the rearward biasing force of the biasing member causes the guide protrusion in the first transverse groove to abut against the rear end surface of the first transverse groove and slide along the rear end surface of the first transverse groove toward one side in the circumferential direction, moving the plunger presser toward one side in the circumferential direction relative to the push button, and causing the guide protrusion in the first transverse groove to face the second longitudinal groove in the front-rear direction, When the push button is pushed forward, the first sliding contact portion and the second sliding contact portion slide against each other until the guide protrusion in the second vertical groove reaches the front end of the second vertical groove, thereby moving the plunger presser toward one side in the circumferential direction relative to the push button and causing the guide protrusion in the second vertical groove to enter the second lateral groove, When the push button is released from being pressed, the rearward biasing force of the biasing member causes the guide protrusion in the second lateral groove to abut against the rear end surface of the second lateral groove and slide along the rear end surface of the second lateral groove toward one side in the circumferential direction, moving the plunger presser toward one side in the circumferential direction relative to the push button, and causing the guide protrusion in the second lateral groove to abut against or approach the end surface of the second lateral groove on one side in the circumferential direction, When the push button is pushed forward and the guide protrusion in the second lateral groove moves forward, the first sliding contact portion and the second sliding contact portion slide against each other, causing the plunger presser to move to one side in the circumferential direction relative to the push button, and causing the guide protrusion in the second lateral groove to enter a connection portion between the second lateral groove and the third longitudinal groove, When the push button is released, the rearward biasing force of the biasing member causes the guide protrusion within the connection portion between the second horizontal groove and the third vertical groove to abut against the rear end surface of the connection portion between the second horizontal groove and the third vertical groove, causing the rear end surface of the connection portion between the second horizontal groove and the third vertical groove to slide toward one side in the circumferential direction, moving the plunger presser toward one side in the circumferential direction relative to the push button, and causing the guide protrusion within the connection portion between the second horizontal groove and the third vertical groove to enter the third vertical groove. <2> The main body cylinder includes an outer cylinder attached to the syringe and an inner cylinder fixed within the outer cylinder, The inner cylinder is formed with a through hole extending radially therethrough, A protrusion is formed on the inner peripheral surface of the outer cylinder and is inserted into the through hole, The guide groove is defined by a gap between the inner surface of the through hole and the protrusion. <1> An auxiliary tool for a syringe container according to claim 1. <3> The rear end surface of the first longitudinal groove is located rearward of the inclined groove. <1> or <2> An auxiliary tool for a syringe container according to claim 1. <4> The plunger presser includes a support portion that supports rear ends of the plunger and the biasing member, and a rotating portion that has the guide protrusion and the second sliding contact portion and is rotatably provided with respect to the support portion. <1> from <3> 10. An auxiliary tool for a syringe container according to any one of the above. [Explanation of symbols]

[0064] 1. Syringe container auxiliary tool 11 Main body tube 12 push button 13 Plunger holder 14 biasing member 21 Outer cylinder 21d protrusion 22 Inner cylinder 22b Through hole 24 Second guide groove (guide groove) 26 Second guide protrusion (guide protrusion) 27 1st sliding contact part 28 2nd sliding contact part 31 First vertical groove 31b Rear end surface of first longitudinal groove 32 First Yokomizo 32a Rear end face of first lateral groove 33 Second vertical groove 34 Support part 37 Second Yokomizo 38 Slant groove 39 Third vertical groove 35 Rotating part 50 syringe containers 51 Syringe 52 Plunger 53 Discharge hole A One side in the circumferential direction

Claims

1. A syringe container auxiliary tool is attached to a syringe container having a syringe extending in the front-rear direction and having a discharge hole for a liquid content, and a plunger protruding rearward from the syringe and provided so as to be movable forward, a main body cylinder detachably attached to the syringe and extending rearward; a push button that protrudes rearward from the main body tube and is movable forward; a plunger presser that pushes the plunger forward in conjunction with the forward and backward movement of the push button; a biasing member that supports the push button and the plunger presser in a rearward biased state so as to be movable forward, the push button is provided so as to be movable forward while its rotational movement in the circumferential direction relative to the main body tube is restricted, The plunger retainer is formed with a guide projection that projects radially outward, The main body tube is formed with a guide groove into which the guide protrusion is movably inserted, The guide groove is a first longitudinal groove extending in the front-rear direction; a first lateral groove extending from a front end of the first longitudinal groove to one side in the circumferential direction; a second longitudinal groove extending forward from one circumferential end of the first lateral groove; a second lateral groove extending from a front end of the second longitudinal groove to one side in the circumferential direction; an inclined groove extending forward from a rear end of the first longitudinal groove toward one side in the circumferential direction; a third longitudinal groove extending forward from one circumferential end of the inclined groove and communicating with one circumferential end of the second lateral groove, The push button and the plunger retainer are respectively formed with a first sliding contact portion and a second sliding contact portion that are in sliding contact with each other, When the push button is pushed forward, the first sliding contact portion and the second sliding contact portion come into sliding contact with each other until the guide protrusion reaches the front end of the first longitudinal groove, thereby moving the plunger presser toward one side in the circumferential direction relative to the push button, and causing the guide protrusion in the first longitudinal groove to enter the first lateral groove, When the push button is released from the depressed state, the rearward biasing force of the biasing member causes the guide protrusion in the first transverse groove to abut against the rear end surface of the first transverse groove and slide along the rear end surface of the first transverse groove toward one side in the circumferential direction, moving the plunger presser toward one side in the circumferential direction relative to the push button, and causing the guide protrusion in the first transverse groove to face the second longitudinal groove in the front-rear direction, When the push button is pushed forward, the first sliding contact portion and the second sliding contact portion come into sliding contact with each other until the guide protrusion in the second longitudinal groove reaches the front end portion of the second longitudinal groove, thereby moving the plunger presser toward one side in the circumferential direction relative to the push button and causing the guide protrusion in the second longitudinal groove to enter the second lateral groove, When the push button is released from being pressed, the rearward biasing force of the biasing member causes the guide protrusion in the second lateral groove to abut against the rear end surface of the second lateral groove and slide along the rear end surface of the second lateral groove toward one side in the circumferential direction, moving the plunger presser toward one side in the circumferential direction relative to the push button, and causing the guide protrusion in the second lateral groove to abut against or approach the end surface of the second lateral groove on one side in the circumferential direction, When the push button is pushed forward and the guide protrusion in the second lateral groove moves forward, the first sliding contact portion and the second sliding contact portion slide against each other, causing the plunger presser to move to one side in the circumferential direction relative to the push button, and causing the guide protrusion in the second lateral groove to enter a connection portion between the second lateral groove and the third longitudinal groove, When the push button is released from the depressed position, the rearward biasing force of the biasing member causes the guide protrusion within the connection portion between the second horizontal groove and the third vertical groove to abut against the rear end surface of the connection portion between the second horizontal groove and the third vertical groove, causing the rear end surface of the connection portion between the second horizontal groove and the third vertical groove to slide toward one side in the circumferential direction, moving the plunger presser toward one side in the circumferential direction relative to the push button, and allowing the guide protrusion within the connection portion between the second horizontal groove and the third vertical groove to enter the third vertical groove.

2. The main body cylinder includes an outer cylinder attached to the syringe and an inner cylinder fixed within the outer cylinder, The inner cylinder is formed with a through hole extending radially therethrough, A protrusion is formed on the inner peripheral surface of the outer cylinder and is inserted into the through hole, 2. The syringe container auxiliary tool according to claim 1, wherein the guide groove is defined by a gap between an inner surface of the through hole and the protrusion.

3. 3. The syringe container auxiliary device according to claim 1, wherein a rear end surface of the first longitudinal groove is located rearward of the inclined groove.

4. 3. The auxiliary device for a syringe container according to claim 1, wherein the plunger presser comprises: a support portion that supports the rear end portions of the plunger and the urging member; and a rotating portion that has the guide protrusion and the second sliding contact portion and is rotatable relative to the support portion.

Images