JPH11216181A - Stopper for syringe for setting variable amount of discharge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stopper for syringe that can easily set the amount of discharging chemical, for example, insulin and so on. SOLUTION: The stopper 2 is set at main body 101 of a syringe or adjusting tip 102. While the amount of a chemical being discharged is being set, the stopper 2 that is set to some part of indicator 105 prevents the adjusting tip 102 from being screwed too much. After the adjusting tip 102 that determines the amount of a stroke by piston rod 103 determines the amount of the chemical being projected by being properly screwed, releasing button 104 is slid. Then, while the piston rod 103 is projected as it is determined, the adjusting tip 102 returns to the first position (the position that indication 105 is coincided with indication 106) automatically by the power of spring. Piston 108 inside cartridge 107 is pushed forward by the piston rod 103, then the chemical, for example, insulin and so on, of which amount has been set can be discharged from the needle 109.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable discharge syringe used for injection of a drug solution such as insulin.
In particular, it relates to the discharge amount setting stopper.

[0002]

2. Description of the Related Art In order to treat diabetes mellitus, subcutaneous injection of insulin is indispensable on a daily basis. Therefore, patients themselves carry out insulin injection (self-injection) with their own syringes.

[0003] The amount of insulin to be injected is prescribed according to each patient, and a syringe equipped with an adjusting mechanism has conventionally been used to adjust the amount. This adjustment mechanism is generally a mechanism that is adjusted by turning by hand, and the patient checks the adjustment scale before setting.

[0004] In particular, in the case of a patient suffering from visual impairment due to the progress of his / her condition, it is difficult to visually check the adjustment scale. A click mechanism was provided.

[0005]

However, in the above-described conventional adjusting mechanism, it is necessary for the patient to check the adjusting scale each time an injection is made. In particular, in the case of a patient with visual impairment, the number of clicks must be counted, which places a heavy burden on the patient.

SUMMARY OF THE INVENTION An object of the present invention is to provide a discharge amount setting stopper of a variable discharge amount syringe which can easily set a discharge amount of an injection solution such as insulin.

[0007]

In order to achieve the above object, according to the present invention, an adjusting member for adjusting a discharge amount of an injection solution is provided movably on a syringe main body, and the adjusting member is provided with an adjusting member. In the variable discharge amount syringe for adjusting the discharge amount according to the movement amount, the one of the syringe main body and the adjustment member is brought into contact with a stopper abutment portion provided on the other member, and the movement of the adjustment member is adjusted. A feature is provided in which a stopper member capable of arbitrarily regulating the amount is provided.

In the present invention, the stopper member provided on one member is adjusted to a position separated from the stopper contact portion provided on the other member by a stroke corresponding to a predetermined discharge amount. Position and fix.

It is sufficient that at least one of the stopper member and the stopper contact portion can be adjusted in the moving direction of the adjusting member.

In this state, when the adjusting member is moved relative to the syringe body in order to set the discharge amount, the stopper member contacts the stopper abutting portion at the set position, and the movement of the adjusting member is forcibly performed. Be regulated. Therefore, if the relative positional relationship between the stopper member and the stopper abutting portion is adjusted in advance, there is no danger that the setting of the adjusting member may be mistaken at the time of the adjusting operation by the adjusting member, and the amount of the medicinal solution to be injected can be accurately and reliably determined. Can be set.

When the adjusting member is not movable in the axial direction and is movable in the rotating direction with respect to the syringe main body, the stopper member and the stopper contact portion are configured to abut on each other in the rotating direction. It is preferable that the amount of movement of the member in the rotation direction is regulated by the contact of the stopper member with the stopper contact portion in the rotation direction.

In this case, the amount of rotation of the adjusting member is regulated by the contact between the stopper member and the stopper contact portion, so that excessive rotation can be prevented.

In the case where the adjusting member moves in the axial direction with respect to the syringe body in accordance with the amount of rotation, the stopper member and the stopper abutting portion are configured to abut against each other in the axial direction, and the adjusting member is moved. It is preferable that the amount is regulated by the axial contact between the stopper member and the stopper contact portion.

[0014] Also in this case, it is possible to prevent the adjustment member from being turned too much.

It is preferable that the stopper member is detachably fixed to one of the syringe body and the adjusting member, and the position of the stopper member is freely adjustable with respect to a stopper contact portion provided on the other member.

For example, if a convex portion of the other member is used as a stopper contact portion, it can be dealt with only by attaching a separate stopper member to a conventional syringe.

It is preferable that the stopper member includes a fixture that can be fixed to the syringe main body so that the position can be adjusted, and a stopper piece that extends integrally from the fixture toward the adjustment member.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the illustrated embodiment.

[First Embodiment] FIG. 1 shows a first embodiment of the present invention.
10 shows a discharge amount setting stopper of the variable discharge amount syringe according to the embodiment.

In FIG. 1, reference numeral 100 denotes a variable discharge amount syringe, in which a syringe body 101 loaded with a drug solution is provided.
An adjustment knob 102 as an adjusting member for setting the discharge amount is provided so as to be freely rotatable, and the discharge amount is adjusted by the movement amount of the adjustment knob 102.

The adjusting knob 102 is a piston rod 103
After setting the discharge amount by rotating the adjustment knob 102 by a predetermined amount, the release button 10 is set.
4, the adjustment knob 102 moves the origin position (origin index 105 to index 1 by the spring force of a spring (not shown)).
(The position coincident with 06), and at the same time, the piston rod 103 projects a predetermined amount. The piston rod 103 pushes the piston 108 in the cartridge 107 loaded in the syringe main body 101, and the drug solution such as insulin in the cartridge 107 is injected into the injection needle 1.
From 09, a set amount is discharged.

The adjustment knob 102 is rotatably mounted on the end of the syringe main body 101 opposite to the injection needle 109, and cannot move in the axial direction with respect to the syringe main body 101 but can move only in the rotation direction. ing. In the illustrated example, the discharge amount is set by rotating clockwise against the spring force of a spring (not shown) incorporated therein, so that the discharge amount set in proportion to the rotation amount increases. It is configured.

Scales 110 are provided at predetermined intervals in the circumferential direction on the outer periphery of the adjustment knob 102, and its origin index (zero point) 105 protrudes in a convex shape. The adjustment knob 102 is provided with a click mechanism (not shown) that emits a click sound every rotation of one division and can also be perceived by the sense of a finger, so that the discharge amount can be set even if it cannot be visually confirmed due to visual impairment or the like. I have. The scale 110 is provided on the outer periphery of the adjustment knob 102 along the counterclockwise direction (the direction opposite to the adjustment direction of the adjustment knob 102) from the origin index (zero point) 105, and is provided with a scale of 40 units in substantially one rotation. I have.

On the other hand, an adjusting knob 1 is provided on the syringe body 101.
An index 106 indicating a scale 110 of 02 is provided. The index 106 also protrudes in a convex shape like the origin index 3.

Although the internal structure of the variable discharge amount syringe 100 is not particularly described because it is not the gist of the present invention, in short, the stroke amount of the piston rod 103 (corresponding to the discharge amount) can be set by the rotation amount of the adjustment knob 102. Any configuration may be used as long as the stroke is electrically controlled.

In the discharge amount setting stopper of the present embodiment, a stopper member 2 protruding toward an adjustment knob 102 is provided on a syringe main body 101, and the stopper member 2 serves as a stopper abutting portion provided on the adjustment knob 102. Origin index 1
By abutting the adjustment knob 102 in the rotation direction, the amount of rotation of the adjustment knob 102 is regulated, and excessive rotation is prevented.

The stopper member 2 is attached to the syringe body 101 so as to be adjustable in position. The stopper member 2 is attached to the outer periphery of the syringe body 101 adjacent to the adjusting knob 102, and the adjusting member 102 And a stopper piece 4 protruding toward. That is, the stopper piece 4 is positioned and fixed by the fixture 3 in such a manner that the stopper piece 4 is aligned with the origin index 105 provided on the adjustment knob 102 by a stroke corresponding to the discharge amount to be preset in the rotation direction in the rotation direction. In addition, the amount of rotation of the adjustment knob 102 is regulated by the stopper piece 4 of the stopper member 2 at the time of adjusting the discharge amount, thereby preventing the adjustment knob 102 from being turned too much.

As shown in FIGS. 1 (b) and 1 (c), the attachment 3 is a fixed band 5 which is wound around the outer periphery of the cylindrical syringe body 101 and is fastened to tighten the fixed band 5 around the outer periphery of the syringe body 2. A mechanism 6 is provided. The fastening mechanism 6 includes a groove 7 formed in the fixed band 5 at a predetermined pitch in the circumferential direction, and a worm gear 8 having spiral teeth of a predetermined pitch that mesh with the groove 7. The worm gear 8 has its shaft arranged along the winding direction of the fixed band 5, and is rotatably attached to one end of the fixed band 5 via a housing 9. on the other hand,
The fixing band 5 is a flexible band member made of metal or the like, and the groove 7 formed in the fixing band 5 is inclined at a predetermined angle with respect to a direction orthogonal to the circumferential direction so that the helical teeth of the worm gear 8 mesh with each other. Have been.

Then, the end of the fixed band 5 on the side opposite to the worm gear 8 is inserted into the gap between the worm gear 8 and the band 5, and a knob 8a provided at one end of the worm gear 8 is provided.
, The other end of the fixed band 5 is drawn in according to the rotation amount of the worm gear 8, and the syringe body 101 is tightened.

However, the tightening mechanism 6 is not limited to such a combination of the worm gear 8 and the fixed band 5 having the groove 7, and both ends of the fixed band 5 may be tightened by screws. It may be fixed to the syringe main body 101 by using the elastic force of a clip or the like. In short, any structure can be applied as long as it can be fixed to the outer periphery of the syringe main body 101.

Although the fixed band 5 and the stopper piece 4 are integrally formed, the stopper piece 4 is formed separately from the fixed band 5, and the stopper piece 4 is attached to the fixed band 5 so as to be adjustable in position. You may. In short, any configuration is possible as long as the stopper member 2 can be fixed at an arbitrary position so as to be freely adjustable.

Next, the discharge amount setting stopper 1 according to this embodiment
The following describes a procedure for setting the discharge amount according to.

First, from the state where the origin index 105 matches the index 106 (see FIGS. 2A and 2B), the control knob 102 for adjusting the discharge amount of the prescribed drug such as insulin.
Is turned on to initialize (Figs. 2 (c) and 2 (d)).
reference). The initial setting of the ejection amount may be performed by the patient himself, may be set at a hospital, or may be set by a family member or the like. At this time, the origin index 105 of the adjustment knob 102 is located at a position separated from the index 106 of the syringe main body 101 by a predetermined stroke in the clockwise direction.

Next, as shown in FIGS. 2 (e) and 2 (f),
The stopper member 2 is mounted, the stopper piece 4 of the stopper member 2 is positioned by abutting against the side edge of the origin index 3 in the adjustment direction (clockwise direction) downstream side, and the fastening mechanism 6 is fastened to fix the fixed band 5 to the syringe body. Fixed to 101. The stopper member 2 may be attached to the syringe main body 101 from the beginning and temporarily fixed at a position where it does not interfere with the initial setting.

After the setting, by sliding the release button 104, the adjusting knob 102 is automatically reversely rotated to the home position by the spring force, and the piston rod 103 strokes by the set amount as described above to reach a predetermined amount. The chemical is automatically discharged.

Once the stopper member 2 has been positioned and fixed in this way, the adjustment knob 10 can be used next time.
If the adjustment knob 102 is rotated until the origin index 105 abuts on the stopper member 1 without worrying about excessive rotation of 2, the amount is automatically set to the initially set amount.

Of course, by setting the discharge amount while checking the scale 110 and checking with the finger and the click sound by the click mechanism, the injection amount can be set more safely and reliably.

(Modification of the First Embodiment) In the above embodiment, the scale 110 is attached to the adjustment knob 102 and the index 106 is attached to the syringe body 101 side.
As shown in (a), if the indicator 106 is attached to the adjustment knob 102 side and the scale 110 is attached to the syringe main body 101 side and the stopper member 2 is attached to the syringe main body 101 side, the scale 110 is adjusted. Adjustment direction (clockwise), the adjustment knob 10
Before setting the first discharge amount according to 2, the scale 11
It is possible to set the stopper member 1 on the reference numeral 0.

In the above embodiment, the case where the stopper member 1 is fixed to the syringe main body 101 has been described. However, as shown in FIG. 3B, the stopper member 1 is fixed to the adjusting knob 102, The indicator 106 formed on the syringe body 101 side is used as a stopper contact portion, and the stopper piece 4 is used.
May be brought into contact with the index 106 to restrict the rotation.

When the scale 110 is provided on the adjustment knob 102, the stopper member 2 may be set on the scale 110 in advance before setting the discharge amount by first turning the adjustment knob 102. It is possible. However, when the scale 110 is provided on the syringe body 101 side,
Initially, a predetermined discharge amount is initially set without a stopper, and the stopper member 2 is fixed in accordance with the origin index at this position.

In the first embodiment, the index 1
06 and the origin index 105 are used as stopper stoppers, but the stopper abutment is used as the index 106 and the origin index 105.
It may be provided separately. Further, the stopper contact portion may be a step portion or a concave portion instead of the convex portion. In the case of a concave portion, it is sufficient to provide spring elasticity so that the stopper piece 4 fits into the concave portion.

Further, the stopper abutting portion is connected to the stopper member 2.
In the same manner as described above, the syringe body 101 and the adjustment knob 102 may be configured separately. In the case of a separate structure, the stopper member 2
The position may be freely adjusted as described above, or the position may not be adjusted.

When the position of the stopper contact portion is adjustable, the position of the stopper member 2 may not be adjusted.
In short, the stopper member 2 is provided on one of the adjustment knob 102 and the syringe main body 101, and engages with the stopper contact portion provided on the other member to rotate the adjustment knob 102 and the syringe main body 101. May be fixed in such a positional relationship that the position is regulated at the set position.

[Second Embodiment] FIG. 4 shows a second embodiment of the present invention.
10 shows a discharge amount setting stopper of the variable discharge amount syringe according to the embodiment.

In this embodiment, a variable discharge amount syringe 20 is used.
The adjustment rod 202 as an adjustment member of the syringe body 2
It moves in the axial direction according to the amount of rotation with respect to 01,
The stopper member 22 and the protruding ends of the adjustment rod 202 serving as the stopper abutting portion are brought into contact with each other in the axial direction to regulate the adjustment amount of the adjustment rod 202.

That is, the adjusting rod 202 is inserted into the end of the syringe main body 201 so as to be freely protruded and retracted.
03, and a knob 204 positioned outside the syringe main body 201 in a state where the rod main body 203 is immersed in the syringe main body 201. When the knob 204 is pinched and rotated, the rod rotates in a helical manner. The main body 203 is configured to protrude in the axial direction. In the illustrated example, it is projected in the axial direction by clockwise rotation, and is drawn into the syringe main body 201 when rotated in the reverse direction.

A scale 205 is spirally provided on the outer peripheral surface of the rod main body 203, and the scale 205 corresponding to the display window 206 provided at the end of the syringe main body 201 has a set amount. ing. This adjustment rod 20
2 also has a click mechanism (not shown) that emits a click sound every time the graduation is rotated and has a click feeling that can be perceived by the sense of a finger.

On the other hand, the knob portion 204 has
Is rotatably mounted, and after the adjustment rod 202 is rotated by a predetermined amount to set the discharge amount, the knob 204
When the finger is pressed against the finger hook 207 and pushed in, the adjustment rod 2
02 returns to the original position (a state in which the rod main body 203 is completely immersed in the syringe main body 201) while being reversely rotated spirally, and the piston rod 208 projects by a predetermined amount. This piston rod 208 allows the syringe body 20
Piston 21 in cartridge 209 loaded in
0 is pushed in, and a predetermined amount of the drug solution is discharged from the injection needle 211.

The stopper member 22 includes a fixture 23 fixed to the outer periphery of the syringe body 201 and a stopper piece 24 projecting from the fixture 23 toward the adjustment rod 202 in the axial direction. The stopper piece 24 includes an axial piece 25 extending in the axial direction along the side surface of the syringe main body 201, and a hook piece 26 extending from the distal end of the axial piece 25 to the center axis side of the adjustment rod 202. The finger hook 207 of the adjustment rod 202 is brought into contact with the hook piece 26 to regulate the axial stroke of the adjustment rod 202. The engagement allowance of the hook piece 26 with the finger hook 207 is configured to partially engage with the finger hook 207 so as not to interfere with the operation of pushing the adjustment rod 202 with the finger.

The attachment 23 has exactly the same structure as that of the first embodiment, and has a fixed band 5 wound around the outer periphery of the syringe main body 201 and fixed, and the fixed band 5 is attached to the syringe main body 2.
A fastening mechanism 6 for fastening to the outer periphery is provided. Since the structure of the fixture 3 described in the first embodiment is exactly the same, the description of the first embodiment is referred to,
The same components are denoted by the same reference numerals, and description thereof will be omitted.

In the second embodiment, the stopper piece 24 is moved by a stroke corresponding to a predetermined discharge amount with respect to the finger hook 207 of the knob 204 located at the protruding end of the adjustment rod 202. The adjustment rod 202 is moved in the axial direction when the discharge amount is adjusted, and the stopper piece 2 of the stopper member 22 is fixed.
4 and the knob 204 of the adjustment rod 202
To prevent over-turning and axial movement.

Also in the second embodiment, the fixing band 5 of the fixture 23 and the stopper piece 24 are integrally formed. However, the stopper piece 24 is formed separately from the fixing band 5, and the stopper piece 24 is formed separately. You may make it attach to the fixed band 5 so that position adjustment is possible. In short, any configuration can be used as long as the stopper member 22 can be fixed at an arbitrary position so as to be freely adjustable.

Next, a procedure for setting the discharge amount by the discharge amount setting stopper according to the present embodiment will be described.

First, remove the stopper member 22 or
Alternatively, the tightening mechanism 6 of the fixing band 5 of the attachment 23 is loosened to temporarily fix the fixing band 5 on the syringe main body 201 at a place where the adjustment operation is not hindered.

Next, the amount of the prescribed insulin is set by the adjusting rod 202 and the stopper member 22 is set.
Of the hook piece 26 of the stopper piece 24 of the adjusting rod 20
2 and is positioned by abutting the upper end of the finger hook 27, and the fastening mechanism 6 of the fixing band 5 is fastened and fixed.

Once set as described above, the adjustment rod 102 is not disturbed in the next use without worrying that the knob of the adjustment rod 202 is turned too much, until the adjustment rod 102 comes into contact with the hook piece 26 of the stopper member 22 in the axial direction. If rotated, it will be automatically set to the initially set amount. Of course, if the discharge amount is set while checking the scale and checking with the finger and the click sound by the click mechanism, it is possible to set the injection amount more safely and reliably.

(Modification of the Second Embodiment) In the case of the above embodiment, the stopper member 22 is
And the finger hook 27 located at the protruding end of the adjustment rod 202 is used as a stopper abutment. However, the stopper member 22 is attached to the knob 204 of the adjustment rod 202, and the stopper abutment is provided on the syringe body 201. You can also.

In this case, since the stopper member 22 rotates, the end of the hook of the stopper piece 24 may be formed in a ring shape, or the end of the hook of the stopper piece 24 may be formed by the partial hook piece 24. In this case, the stopper contact portion may be formed in a ring shape. The stopper contact portion may be a convex portion, a concave portion, or a step portion. Further, since the position of the mounting member 23 of the stopper member 22 cannot be adjusted in the axial direction, the position of the stopper piece 24 with respect to the mounting member 23 can be adjusted, or the position of the stopper abutting portion on the syringe body 201 side can be adjusted. What is necessary is just to be able to adjust in the axial direction.

When the stopper piece 24 can be adjusted, for example, the stopper piece 24 may be configured to be slidable in the axial direction with respect to the fixture 23 and fixed at an arbitrary position by a screw or the like. When the position of the contact portion can be adjusted, the ring-shaped stopper contact portion may be attached by an elastic force or a tightening force of a screw so that the position can be adjusted.

In the second embodiment, the finger hook 207 at the protruding end of the adjusting rod 202 is used as a stopper abutting part.
2 may be separately provided. Also in this case, it is necessary to provide the hook piece 24 or the stopper contact portion in an annular shape. The stopper contact portion provided on the side surface of the adjustment rod 202 may be a convex portion, a concave portion, or a step portion. In the case of a concave portion, it is sufficient to provide spring elasticity so that the stopper piece 24 fits into the concave portion.

As a matter of course, the stopper abutting portion may be formed separately from the syringe body 201 and the adjusting rod 202 similarly to the stopper member 22 so that the position can be adjusted in the axial direction like the stopper member 2 or the position cannot be adjusted. It may be. If the stopper abutment can be adjusted in the axial direction,
The position of the stopper member 22 may not be adjustable. In short, the stopper member 22 is provided on one of the adjusting rod 202 and the syringe main body 201, and abuts the stopper abutting portion provided on the other member in the axial direction, so that the adjusting rod 202 and the syringe main body 201 are provided. It is only necessary to be able to fix the positional relationship in such a manner as to restrict the axial positional relationship.

[0062]

As described above, according to the discharge amount setting stopper of the present invention, the amount of movement of the adjusting member at the time of setting the injection amount can be restricted to an arbitrary position. At this time, there is no possibility that the setting of the adjustment member is mistaken, and the injection amount can be set accurately and reliably.

[Brief description of the drawings]

FIG. 1 (a) is a partially cutaway perspective view of a discharge amount variable syringe using a discharge amount setting stopper according to a first embodiment of the present invention, and FIG. 4) is an enlarged perspective view of the stopper member, and FIG. 4C is a partially cutaway front view of the stopper member of FIG. 4B.

FIG. 2 is an explanatory diagram showing a discharge amount setting procedure of a discharge amount setting stopper of FIG. 1;

FIGS. 3A and 3B are diagrams showing a modification of the first embodiment of the present invention.

FIG. 4 is a view showing a discharge amount variable syringe using a discharge amount setting stopper according to a second embodiment of the present invention. FIG. FIG. 7B is a perspective view of a main part in a state where the adjustment rod projects and comes into contact with the stopper member.

[Explanation of symbols]

 Reference Signs List 2 stopper member 3 mounting tool 4 stopper piece 5 fixing band 6 tightening mechanism 7 groove 8 worm gear 8a knob 9 housing 101 syringe body 102 adjustment knob (adjustment member) 105 origin index (stopper contact part) 106 index 22 stopper member 23 mounting Tool 24 Stopper piece 25 Axial piece 26 Hook piece 201 Syringe body 202 Adjustment rod 203 Rod body 204 Knob 207 Finger hook (stopper abutment)

Claims (5)

[Claims] 1. A discharge amount variable syringe in which an adjusting member for adjusting the discharge amount of the injection solution is movably provided on the syringe body, and the discharge amount is adjusted by the moving amount of the adjusting member. A discharge member is provided, wherein one of the members is provided with a stopper member which is capable of arbitrarily restricting the amount of movement of the adjusting member by coming into contact with a stopper contact portion provided on the other member. Discharge rate setting stopper for variable volume syringe. 2. The adjusting member is provided so as to be immovable in the axial direction and movable in the rotating direction with respect to the syringe body, and to move the adjusting member in the rotating direction by rotating the stopper member and the stopper contact portion. The discharge amount setting stopper of the discharge amount variable syringe according to claim 1, wherein the stopper is regulated by contact in the direction. 3. The adjusting member is configured to move in the axial direction with respect to the syringe body in accordance with the amount of rotation, and the amount of movement of the adjusting member is regulated by the axial contact between the stopper member and the stopper contact portion. Item 2. A discharge amount setting stopper of the variable discharge amount syringe according to Item 1. 4. A stopper member is detachably fixed to one of the syringe main body and the adjusting member, and the position of the stopper member is adjustable with respect to a stopper contact portion provided on the other member. A discharge amount setting stopper for the variable discharge amount syringe according to claim 1, 2 or 3. 5. The stopper member according to claim 1, further comprising: a mounting member which can be fixed to the syringe body so as to be adjustable in position, and a stopper piece extending from the mounting member to the adjusting member side. 4. A discharge amount setting stopper for the variable discharge amount syringe according to 4.