JP2014083083A - Operation tool for operating replaceable type cylindrical pipet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an operation tool making a disposable type cylindrical pipet usable in a user-friendly manner and with high accuracy.SOLUTION: An operation tool for operating a displaceable type cylindrical pipet at least includes: a cylinder body 2; a fastener 3; and a push rod 4. The cylinder body 2 includes: an insertion part 2a having an outside diameter that can be inserted into the cylindrical pipet 1 at least in the substantially front part thereof; and a slim part 2b formed in a reverse-tapered state in which the outside diameter of the cylinder body is gradually decreased as it goes from the front to the rear, in a partial range of the outer periphery in a partial range in the major axis direction of the insertion part 2a. The fastener 3 is substantially cylindrical and has such an inside diameter as to be freely slidable at least in a partial range when being fitted to the insertion part 2a, and is capable of fixedly holding the displaceable type cylindrical pipet by being slid to be fitted to the slim part 2b. The push rod 4 penetrates through the cylinder body 2, is capable of being slid on the interior of a cylindrical part 1c, and can operate a content of the pipet 1 so as to freely discharge and suction the content.

Description

  The present invention relates to a syringe container (cylindrical pipette) mainly used for dental treatment and the like, and more particularly, to an operation tool for operating the replaceable cylindrical pipette.

  As a syringe container of this type, a syringe cylinder having a nozzle at the tip is integrally formed of a relatively hard synthetic resin material, and a chemical solution stored in the syringe cylinder is poured out of the nozzle by pushing the piston, so that the oral cavity It is known to administer and inject into the affected area.

  However, since the syringe container is disposable for each use from the viewpoint of hygiene, not only the container itself, but also the chemical solution remaining in the inside must be discarded every time, It was uneconomical.

  In order to solve such a problem, Patent Document 1 is configured such that a tip having a nozzle (tube) bent at the tip is detachably screwed to the tip of the cylinder body. An injection device is disclosed in which only the tip is changed.

  However, in the prior art described in the above publication, it is difficult to cope with the case where only a small amount of one dose is required. In addition, the chip itself, including its disposal cost, is not sufficiently inexpensive, and there is a problem from the viewpoint of effective use of resources.

  In contrast, disposable single-hole syringes or pipettes made of synthetic resin with a tubular lumen volume with pores of about 1 ml can be used in small quantities, saving manufacturing costs and disposal costs, In the effective use of, excellent effects can be exhibited.

JP-A-8-243160

However, this is difficult because it is small and difficult to hold by hand, and is difficult to operate.
In addition, it is difficult to apply a minute volume quantitatively and accurately by the technique of pressing and releasing the outer wall of the dropper or pipette with fingers.

  Therefore, the present invention has been made to solve the above-described problems in the prior art, and an object thereof is to provide an operation tool that makes it easy to handle and use the disposable cylindrical pipette with high accuracy.

An operation tool for operating a replaceable cylindrical pipette according to the present invention for solving the above technical problem,
It is an operation tool for operating a replaceable cylindrical pipette 1 having a pore 1a at the front end, a cylindrical portion 1c capable of storing contents at the rear end, and an opening 1d at the rear end,
The operation tool has at least a cylindrical body 2, a fastener 3, and a push rod 4,
The cylindrical body 2 has an insertion portion 2a having an outer diameter that can be inserted into the replaceable cylindrical pipette 1 at least at a substantially front portion, and a part of the insertion portion 2a in the major axis direction. In the range, at least a part of the outer periphery has a detail 2b that is a part in which the outer diameter of the cylindrical body is smaller in the rear part than in the front part and is in an original thin state,
The fastener 3 has a substantially cylindrical shape, has an inner diameter that can be freely slidable in at least a part of the fitting portion 2a, and is clamped with the detail 2b by sliding. It is possible to sandwich and fix the replaceable tubular pipette 1
The push rod 4 penetrates the inside of the cylindrical body 2 and can be slid inside the cylindrical portion 1c, and at least a part of the range of the push rod 4 on the long axis is the cylinder. The inner surface of the part 1c and / or the inner surface of the cylindrical body 2 is airtight, and the contents of the pipette 1 can be operated to be freely discharged and sucked.

The present invention also provides:
It is preferable that there is an adjacent detail 2b1 in which a portion having the detail 2b of the cylindrical body 2 is cut perpendicularly to the major axis and the degree of the original narrowing state is smaller than the detail.

Furthermore, the present invention provides
It is preferable that at least a part of the detail 2b reaches and penetrates the inner surface of the cylindrical body 2.

The present invention also provides:
It is preferable that the detail 2b of the cylindrical body 2 extends over the entire circumference.
Furthermore, the present invention provides
Near the front end of the push rod 4, there is a front end airtight portion 4a that can be airtightly oscillated with respect to the inner surface of the pipette 1, and a rear sliding portion 4b that is a substantially subsequent portion of the front end airtight portion 4a is The diameter is preferably smaller than that of the distal end airtight part 4a.

The present invention also provides:
The fastener 3 is preferably crimped forward by the elastic material 5.
Furthermore, the replaceable cylindrical pipette according to the present invention is
A replaceable cylindrical pipette 1 having a pore 1a at the front end, a cylindrical portion 1c capable of storing contents at the rear end, and an opening 1d at the rearmost end, at least in the vicinity of the opening 1d. It can be deformed with a tool and can be tightly and tightly fixed. Even if the contents of the pipette 1 can be freely taken in and out, the pipette 1 does not fall out of the operation tool or the contents leak from between the operation tools. It is characterized by having a flexibility that can be fixed tightly in an airtight manner.

  By handling the flowable medical material with the operation tool for operating the replaceable cylindrical pipette of the present invention, a small amount of medical material can be easily applied to the affected area with a precise capacity. Furthermore, even if the replaceable cylindrical pipette is contaminated by the above application, the contamination can be removed by replacing it. The contaminated pipette may be used as it is, or immediately reused in the same contamination source. Therefore, it is possible to prevent the diffusion of contamination to others, and in some cases, it can be reusable after being cleanly sterilized and decontaminated.

  Further, according to the replaceable cylindrical pipette according to the present invention, it can be preferably operated with the operation tool.

It is a whole sectional view showing one example of the present invention. It is a partial expanded sectional view of the Example shown in FIG. It is sectional drawing in the state which slid the fastener of the Example shown in FIG. 2 ahead. It is a partial expanded sectional view in case it has an adjacent detail. It is sectional drawing in the state which slid the fastener of the Example shown in FIG. 4 ahead. It is the front view and sectional drawing which illustrated the lumen | bore of the fastener. It is a front view of another Example of a fastener. It is the front view and sectional drawing which illustrated the rear part sliding part. It is another Example of a push rod. It is another Example of a push rod. It is sectional drawing including the perspective view of the Example using an elastic body. It is sectional drawing containing the perspective view in the state which slid the fastener of the Example of FIG. 11 ahead. It is sectional drawing which showed the Example of the replacement | exchange pipette. It is the side view which showed another form of the front-end | tip airtight part.

Hereinafter, examples of the present invention will be described with reference to the drawings. However, the present invention is not limited to the examples.
FIG. 1 shows an operation tool and a pipette according to an embodiment of the present invention.

The operating tool according to the present embodiment operates the replaceable cylindrical pipette 1 having the pore 1a at the front end, the cylindrical portion 1c capable of storing the contents at the rear end, and the opening 1d at the rear end. Operation tool,
The operation tool has at least a cylindrical body 2, a fastener 3, and a push rod 4,
The cylindrical body 2 has an insertion portion 2a having an outer diameter that can be inserted into the replaceable cylindrical pipette 1 at least substantially at the front, and a partial range in the major axis direction of the insertion portion 2a. In at least a part of the outer periphery, the outer diameter of the cylinder has a detail 2b in which the rear part is smaller than the front part and is in an original thin state,
The fastener 3 has a substantially cylindrical shape, has an inner diameter that can be freely slidable in at least a part of the fitting portion 2a, and is clamped with the detail 2b by sliding. It is possible to sandwich and fix the replaceable tubular pipette 1
The push rod 4 penetrates the inside of the cylindrical body 2 and can be slid inside the cylindrical portion 1c, and at least a part of the range of the push rod 4 on the long axis is the cylinder. It is an operating tool for operating the replaceable tubular pipette 1 that is airtight to the inner surface of the part 1c and / or the inner surface of the cylindrical body 2 and is capable of operating the contents of the pipette 1 to be freely discharged and sucked.

  In addition, airtight refers to a state where the surfaces are in close contact with each other, such as a piston and a syringe of a syringe, and fluid cannot enter. In the following description, unless otherwise specified, for example, in principle, in an annular or cylindrical shape, fluids may mix with each other by closely contacting the entire circumference. It shall be in a state where it is divided into no areas.

  In the operation tool of the present invention, the side to which the pipette is connected is the front (or the front) along the long axis direction or the sliding direction of the push rod, and the opposite is the rear (or the original). . The drawings described below are basically cross-sectional views (2b 'in FIG. 2, AA'BB' in FIG. 6 and FIG. 7 are front views). These are illustrated only by dotted outlines.

In the example of FIG. 1, the cross section of the detail 2 b is observed.
In the example of FIG. 1, a tapered taper portion 1 b that is tapered is provided at the front end of the replaceable cylindrical pipette 1 between the pore 1 a and the cylindrical portion 1 c at the rear end.

  Further, in the example of FIG. 1, there is a cylindrical jacket portion 2 c at the rear end of the insertion portion 2 a of the cylindrical body 2, and the fastener 3 is positioned so as to abut against the front end portion 2 c 1 of the jacket portion which is the front end portion thereof. doing.

In the example of FIG. 1, a finger hooking portion 2c2 is provided at the rear end of the jacket portion.
In FIG. 1, the jacket portion 2 c is configured to be combined with the cylindrical body 2 as a separate member. However, the jacket portion 2 c may be formed as a single unit. The jacket portion 2c has a role of ensuring a thickness that can be easily held by hand.

In the example of FIG. 1, it has the fastener O-ring part 3b, and has a function of preventing slipping and maintaining airtightness.
Further, in the example of FIG. 1, there is a tip airtight portion 4 a that can be hermetically slidable with respect to the inner surface of the pipette 1, and a rear portion that is a substantially subsequent portion of the tip airtight portion 4 a. The sliding part 4b has a smaller diameter than the distal end airtight part 4a. Furthermore, the rear end portion of the push rod 4 has a finger hooking push portion 4c.

  The replaceable cylindrical pipette 1 having a pore 1a at the front end, a cylindrical portion 1c capable of storing contents at the rear portion, and an opening 1d at the rear end, used in the present invention, includes The dental material is not particularly limited as long as it is suitable for holding a dental material in the cavity and being used in a human oral cavity.

  The replacement-type cylindrical pipette 1 puts and removes dental materials in the front end pore 1a, stores the contents in the rear end cylindrical portion 1c, and uses the operation tool of the present invention in the rear end opening 1d. Are connected and the contents are put in and out.

All of the pore 1a, the cross section of the cylindrical portion 1c, and the opening 1d are generally circular, but are not particularly limited.
In FIG. 1 or FIG. 2, the outer diameter of the cylindrical body from the front end of the cylindrical body 2 to the jacket front end 2 c 1 is an insertion portion 2 a that can be inserted into the pipette 1. Therefore, it is impossible to insert the pipette 1 up to the jacket front end 2c1. The jacket front end portion 2c1 also functions as a retraction preventing portion that suppresses further movement of the fastener 3 to the rear. However, by having such a retraction preventing portion, the jacket 3 can be prevented from sliding excessively. It is preferable to suppress.

  As shown in FIG. 1 or FIG. 2, the outer diameter of the cylindrical body 2 in the partial range Z in the major axis direction of the insertion portion 2a is in a thinned state where the rear portion is smaller than the front portion. It has the detail 2b which is a part which is present. In the present invention, since the detail 2b is provided in at least a part of the outer periphery of the cylindrical body 2, the portion having the detail 2b is cut in a cross section perpendicular to the major axis, unlike the detail. There is a case where there is an adjacent detail 2b1 which is not in a thin state, and there is no adjacent detail 2b1 in a cross section obtained by cutting a portion having the detail 2b perpendicularly to the long axis, that is, the detail 2b extends over the entire circumference of the cylindrical body 2. In some cases. In the latter case, the cross section may be as shown in FIG. 1 or FIG. 2 over the entire circumference.

  In addition, when the entire circumference of the former does not extend, the circumference reduction due to the details can be suppressed. As a result, it is easy to suppress the deterioration of the airtightness due to the wrinkle on the pipette, and the details penetrate the cylinder. If provided, there is an advantage that the function of connecting the front and rear of the through hole is exhibited. On the other hand, in the latter case, the pipette can be fixed regardless of the circumferential direction of the fastener, particularly in the case of a circular shape, and there is an advantage that the operability is excellent.

First, the former case will be mainly described in detail.
That is, in the former case, in FIG. 2, only the range Y of the outer periphery of the cylindrical body 2 is as shown in the front view 2b ′ of the detail viewed from the direction perpendicular to the long axis with respect to the cross section of the detail 2b. In FIG. 2, when the adjacent detail 2b1 is provided, it is assumed that the cross-sectional view has two details 2b in combination with the left and right of the cross-sectional view, so the actual range is Y × 2. In the case of having the adjacent detail 2b1 in FIG. 2, the range Y is set so as to occupy 1/3 of the entire circumference.

  In FIG. 2, the depth X of the details is substantially equal to the thickness of the pipette 1 and the fastener 3 is substantially in close contact with the cylindrical body 2, so that when the fastener 3 is slid forward, FIG. As shown, the pipette 1 fits in the recess of the detail 2b, and the shape part in which the lumen of the fastener 3 protrudes to the inside corresponds to the shape of the detail 2b, and is fixed to the cylinder 2 at the front of the detail 2b. A tool 3 sandwiches and fixes the cylindrical portion 1. In the example of FIG. 2 and the like, a detail side inclined portion 3c1 is provided at a portion corresponding to the detail 2b at the front end of the fastener 3 so that the pipette 1 is smoothly accommodated in the recess of the detail 2b.

  In addition, when the front part of the detail 2b also has an inclined part or an R part, the pipette 1 can easily adhere to the cylinder in an airtight manner. Even when the rear end of the detail 2b is within the slidable range of the fastener 3, it is preferable to provide the inclined portion and the R portion, which contributes to smooth sliding of the fastener 3. In addition, it is preferable to provide the R portions not only at the front and rear ends of the details 2b but also at the lateral ends in this manner, because the effect that the pipette 1 is easily airtightly adhered to the cylinder body is exhibited.

  The depth X of the detail 2b (specific height compared to the radius of the cylindrical portion having a uniform front outer diameter) is preferably 0.08 to 0.8 mm, more preferably 0.11 to 0.5 mm, More preferably, it is 0.14-0.37 mm. Below the lower limit of these numerical ranges, the holding force to fix the pipette is low and the effect of the invention can not be achieved, while when the upper limit is exceeded, the pipette is forcibly bent and wrinkled, If sufficient pressure is not obtained, the airtightness deteriorates, which is not preferable. The range Y occupied by the details 2b in the outer periphery of the cylindrical body 2 is preferably 10% or more, more preferably 30% or more, and still more preferably 60% or more. Below the lower limit of these numerical ranges, the holding force for fixing the pipette becomes low and the effects of the invention cannot be achieved, which is not preferable. The upper limit value corresponds to the lower limit value of the adjacent details. The range Z in which the detail 2b in the major axis direction exists is preferably 10 to 160 mm, more preferably 30 to 100 mm, and still more preferably 40 to 80 mm. Below the lower limit of these numerical ranges, the holding force for fixing the pipette becomes low and the effect of the invention cannot be achieved, while when it exceeds the upper limit, it becomes impractical or unrealistic, It is not preferable. However, the depth X is compared to the radius of a cylindrical portion having a uniform front outer diameter, and excludes an inclined portion whose outer diameter changes in the major axis direction.

  If the adjacent details are not substantially narrowed and the shape of the fastener 3 is consistent, the adjacent details may be tapered as opposed to the details 2a. The specific height compared to the radius of the uniform cylindrical portion is preferably 0.8 mm or less, more preferably 0.4 mm or less, and still more preferably 0.2 mm or less. Exceeding the upper limit of the numerical range is not preferable because excessive stress is applied to the pipette. On the other hand, if the adjacent detail is too low, the effect is not exhibited, so the height is preferably −0.13 mm or more, more preferably −0.10 mm or more, and further preferably −0.07 mm or more. The range occupied by the adjacent details in the outer periphery of the cylindrical body 2 is preferably 10% or more, more preferably 30% or more, and further preferably 60% or more. The upper limit corresponds to the lower limit of details.

  On the other hand, in FIG. 4, which is a cross section perpendicular to the long axis with respect to the cross section of FIG. 2, the details 2 b are not seen, but in this cross section, a pipette is placed between the cylinder 2 and the fastener 3 accordingly. Since a clearance substantially equal to the thickness of 1 is provided, there is no problem even if the fastener 3 is slid forward as shown in FIG.

  As described above, the shape of the fastener 3 in which the cross-sectional shape of FIGS. 2 and 3 and the cross-sectional shape of FIGS. When the cross section of FIGS. 2 and 3 is a plane AA ′ and the cross section of FIGS. 4 and 5 is a plane BB ′, the result is as shown in FIG. In FIG. 6, the cross section AA ′ in the plane AA ′, the cross section BB ′ in the plane BB ′, and the front plane AA′BB ′ perpendicular to the plane AA ′ and the plane BB ′ are arranged. . The lumen shape of the cross section AA'BB 'is initially circular in order from the front, but it changes from the middle of the inclined part into an oval shape, and goes straight, and behind the vertical step in front of the O-ring in the cross section BB' The shape is inscribed in the front oval shape and is followed by a circular lumen. Explaining in order of production, first, the inclined portion 3c1 of the cross section AA ′ is cut from the front, then cut into an oval cylindrical shape seen in the cross section AA′BB ′, and the cross section AA′BB ′ is formed at the rear end. It can be cut and formed into a cylindrical shape with the smallest circular cross section.

In particular, since it seems that it is difficult to imagine the three-dimensional connection shape between the inclined portion and the oval shaped hole, the shape of the lumen of the fastener 3 is expressed by a mathematical expression as an example for easy understanding, for example, as follows: Become.
_[x ² + y ² ≦ {R ₁ + z ・ (R ₂ -R ₁ ) / S ₂ } ² ∩ 0 ≦ z ≦ S ₂ ] ∪
_(-(R2 ² -x ² ) ^1/2 -d ≦ y ≦ (R ₂ ² -x ² ) ^1/2 + d ∩ S ₁ ≦ z ≦ L ₁ ∩ d = (R ₁ -R ₂ ) ・ ( 1-S ₁ / S ₂ )] ∪
_[x ² + y ² ≦ R ₂ ² ∩ L ₁ ≦ z ≦ L ₂ ] ∪
_[x ² + y ² ≦ (R ₂ + P) ² ∩ {(x ² + y ² ) ^1/ _2- (R ₂ + P)} ² + (zL ₂ + P) ² ≧ P ² ∩ L _2- P ≦ z ≦ L ₂ ]
(The long axis rear is the z-axis positive direction and the long cross-section long axis is the y-axis, the front of the fastener 3 and the rear opening radius are R ₁ and R ₂ (the rear is the radius in front of the R portion), and the cross section AA ′. , BB ′, the depth in the z-direction of the inclined portion is S ₂ , S ₁ , the depth in the z-direction from the front opening to the vertical step in the cross section BB ′ is L ₁ , and the z-direction from the front opening to the rear opening Depth is L ₂ and R radius of the rear opening is P.)

  When the formulas surrounded by [] in each row of the four-row formula are sequentially expressed as formula (1) to formula (4), formula (1) is the inclined portion of the front opening, and formula (2) follows. The oval cylindrical portion, equation (3) is a further cylindrical portion, and equation (4) shows the lumen of the R portion of the rear opening, and the union of these spaces is the fastener 3 lumen. It is an example of a shape. The shape of the 0-ring part was ignored.

As described above, it is important that the surface of the inner cavity of the fastener 3 has a shape adapted to the arrangement and shape of the details 2b.
As shown in the cross-sectional view of FIG. 7, the details 2b on the surface of the inner cavity of the fastener 3 and the corresponding parts, etc., are not straight but bent slightly intricately. It is preferable to adjust the pipette 1 so that it substantially coincides with the peripheral length of the rear end. This is also applicable to the case of all-round details that do not have adjacent details. In any case, the circumference of the outer circumference (detail circumference) in the cross section perpendicular to the major axis, including the details of the cylinder 2, is relative to the circumference of the cross section (normal circumference) without the details in front of it. The ratio (detail circumference / normal circumference) is preferably 0.92 to 1.08, more preferably 0.94 to 1.06, and still more preferably 0.96 to 1.04. If the lower limit of the above numerical range is exceeded, excessive compression will be applied to the pipette membrane wall, which may cause wrinkles and impair airtightness.If the upper limit is exceeded, conversely, excessive tensile stress will be applied to the pipette membrane wall. May be damaged in some cases, and there is a risk that the airtightness may be impaired.

  In addition, since it may be easier to process when at least part of the details 2b reaches and penetrates the inner surface of the cylindrical body 2, such an embodiment is also preferable. In the case of FIG. 2, FIG. 3, FIG. 8, FIG. 9, and FIG. However, in the case of FIG. 8 and FIG. 10, when penetrating, the pipette membrane wall is in close contact with the push rod and fills the gap between the push rod and the cylindrical body, which is different from the actual illustration.

  The example of the complicated shape in the case of having the adjacent detail has been described in detail above. However, the fastener 3 having not only the substantially circular shape but also the complex shape similar to that in the case of having the adjacent detail is provided even when the adjacent detail is not provided. And the detail 2b of the shape corresponding thereto, and the depth Y of the detail 2b may be uniform over the entire circumference as long as it has a shape corresponding to the fastener 3 appropriately. It may be good or non-uniform.

  As shown in FIG. 1, the push rod 4 has a tip airtight portion 4 a that is airtightly slidable with respect to the inner surface of the pipette 1, and a rear slide that is a substantially subsequent portion of the tip airtight portion 4 a. The moving part 4b preferably has a smaller diameter than the distal end airtight part 4a. Further, an insertion introducing portion 4a1 having an inclination and an R portion for facilitating insertion into the pipette is provided in front of the tip airtight portion 4a, or a step angle between the tip airtight portion 4a and the rear sliding portion 4b. It is also preferable to provide a step buffering inclined portion 4a2 having an inclination and an R portion for preventing the pipette from being caught on the inner wall of the pipette.

  The push rod 4 can be operated so that the contents of the pipette 1 can be discharged and sucked as long as at least part of the long axis of the push rod 4 is airtight to the cylindrical portion 1c and / or the cylindrical body 2. Since it is possible, as shown in FIG. 8, the push rod 4 and the cylinder 2 do not have to be airtight if the tip airtight portion 4a can keep airtightness with respect to the pipette. On the contrary, it is preferable that the push rod 4 and the cylinder 2 are not airtight because they can slide smoothly and have a high degree of freedom in materials and processing accuracy.

  Alternatively, as shown in FIG. 9, even if the push rod 4 is not airtight with respect to the pipette 1 but only with respect to the cylindrical body 2, the contents of the pipette cannot be kept airtight with the outside world. However, there is a risk that the gap between the push rod 4 and the pipette 1 may lead to a decrease in operation efficiency and prevention of contamination, which is not preferable.

  Incidentally, an O-ring or the like may be provided as means for maintaining the airtightness between the cylindrical body 2 and the push rod 4, and it is preferable to provide the O-ring 2d in the cylindrical body 2 as shown in FIG. Is preferred.

  As shown in FIG. 11, it is also preferable that an elastic body 5 such as a spring is installed at the rear end of the fastener 3 and the fastener 3 is crimped forward by the elastic material 5 as shown in FIG. 12. In this case, when the cylindrical body-side protrusion 2e and the fastener-side protrusion 3d, which can be anchored to each other, are provided on the outer surface of the cylindrical body 2 and the inner surface of the fastener 3, and the stopper 3 is formed as a stopper, the fastener 3 is It is preferable that it can be prevented from coming off and excessive pressure is applied to the sandwiched pipette. In the case of having such a stopper, the elastic body 5 does not need to be mechanically joined to the fastener 3 or the cylindrical body 2, and is simply in contact with the elastic body 5, and there is no fear of breaking apart. The fastener can be moored to the cylinder. Or it can also be achieved by tying the cylinder 2 and the fastener 3 with an elastic body to anchor the fastener to the cylinder. In addition, when the fastener 3 is pressure-bonded and fixed by an elastic body, there is an extremely low risk that the fastener 3 loosens and the contents leak or squirt during the pipetting operation. It is not necessary.

  Since the operation tool of the present invention has the mechanism as described above, mechanical power and other special fastenings can be performed very easily and safely and accurately with a slight force of human fingers. It is a manual operation tool that does not require the assistance of tools (such as pliers and spanners).

  Now, in the pipette 1, at least the vicinity of the opening 1d can be deformed by being crimped by a manual operation tool so that it can be tightly fixed tightly, and the contents of the pipette 1 can be taken in and out freely. The pipette 1 has such flexibility that it can be tightly fixed tightly to the extent that the pipette 1 does not fall out of the tool or the contents leak from the tool. Accordingly, only the vicinity of the opening 1d may be made of such a flexible material. However, it is preferable to integrally form the whole with the same material because it does not take time for manufacturing and the quality is stable.

Furthermore, it is possible to prevent the pipette contents from being attached to the operation tool itself by making a pipette longer or providing an aneurysm or circuit around the pipette.
The material of the pipette is not particularly limited, but it is preferable that the pipette has flexibility enough to be appropriately deformed when being fixed with the operation tool of the present invention in the opening 1d or in the vicinity thereof. . Therefore, it is sufficient if the finger is flexible enough to bend easily. However, since it is as soft as a kitchen wrapping material, it is not easy to handle. Therefore, when it is formed into a cylindrical shape, it is preferable to have rigidity enough to withstand its own weight and hold the lumen space. Further, it is not preferable to have rubber elasticity like rubber because it may hinder the contents discharging and sucking operation. Therefore, polymer materials such as polyethylene, polypropylene, polyamide, poly (meth) acryl, and polyester, copolymers thereof, and polymer materials such as polymer alloy are preferable. In particular, polyethylene, polypropylene, and the like that are inexpensive, hardly change in quality, and are relatively safe are more preferable.

  As for the cylinder part 1c, the magnitude | size and shape of an internal cross section are constant in a major axis direction as a rule so that a push rod can slide freely, On the other hand, an outer surface does not have such a restriction | limiting in particular. The inner cross section is most preferably circular, but may be elliptical, polygonal, star-shaped, or the like as long as it fits in shape with the push rod of the tool.

  Also, as shown in FIG. 13, it is preferable to provide a tip contact portion 1c1 that matches the shape of the tip portion of the push rod at the front end portion of the cylindrical portion 1c because excessive stress is not applied to the pipette. Moreover, if the taper and the level | step difference are provided in the rear-end part of the cylinder part 1c as FIG. 13, it will become easy to insert the cylinder 2 and the push rod 4. FIG.

  The length of the cylindrical body 2 is not particularly limited as long as it is suitable for the size of the replacement pipette and is not inconvenient for use in the oral cavity for dental use or the like. Preferably it is 20-150 mm, More preferably, it is 40-100 mm, More preferably, it is 50-80 mm. When the value falls below the lower limit of the numerical range, a sufficient internal volume cannot be secured, and when the value exceeds the upper limit, the operability is lowered, which is not preferable.

  The length of the insertion portion 2a of the cylindrical body 2 is preferably 10 to 45 mm, more preferably 15 to 35 mm, and still more preferably 20 to 30 mm. If the value falls below the lower limit of the numerical range, the fixing of the pipette may be insufficient, and if the value exceeds the upper limit, handling becomes difficult, which is not preferable. Note that the movable range of the fastener 3 is preferably about the numerical range for the same reason.

  The outer diameter of the insertion portion 2a of the cylindrical body 2 is preferably 1 to 5.5 mm, more preferably 2 to 4 mm, and still more preferably 2.5 to 3 mm. When the value falls below the lower limit of the numerical range, a sufficient internal volume cannot be secured, resulting in poor working efficiency, and when the value exceeds the upper limit, the operability is deteriorated because it is too thick.

  On the other hand, the inner diameter of the insertion portion 2a of the cylindrical body 2 is preferably 0.8 to 5 mm, more preferably 1.3 to 3.5 mm, and still more preferably 1.8 to 2.5 mm. When the value falls below the lower limit of the numerical range, a sufficient internal volume cannot be secured, resulting in poor working efficiency.

The inner diameter of the cylindrical body 2 other than the insertion part 2a is the same as that of the insertion part 2a of the cylindrical body 2.
In order to securely fix the pipette, not only the size of the fastener 3 itself, but also the actual length of the membrane wall in the vicinity of the opening 1d of the pipette is hermetically adhered and fixed. is important. That is, by combining the structure of the insertion portion 2a and the fastener 3, the slidable range of the fastener, and the like, the membrane wall is formed within a range in which the insertion portion 2a, the pipette 1 and the fastener 3 can overlap. It is important that a proper clearance between the insertion portion 2a and the fastener 3 is realized in a sufficient area so that the fixing can be sufficiently performed. The clearance is preferably 0.3 to 0.75 mm, more preferably 0.35 to 0.6 mm, and still more preferably 0.4 to 0.5 mm. In addition, the area is preferably 20～85Mm ^2, more preferably 30～65Mm ^2, more preferably from 35~55mm ^2. Alternatively, for convenience, the length in the major axis direction in the range where the clearance is realized is preferably 1.8 to 8 mm, more preferably 2.5 to 6 mm, and still more preferably 3 to 5 mm. When the clearance is below the lower limit of the numerical range, it is difficult to slide the fastener 3 to the range where the pipette membrane wall is deployed, and when the clearance exceeds the upper limit, it is difficult to sufficiently fix the pipette membrane wall. Both are not preferred. If the area or length falls below the lower limit of the numerical range, it becomes difficult to sufficiently fix the pipette membrane wall. Since compactness is impaired, neither is preferable. The clearance is defined by the outer diameter of the corresponding portion of the insertion portion 2 a of the cylindrical body 2 and the inner diameter of the corresponding portion of the fastener 3.

  Alternatively, it is considered that the fixing force of the pipette has a large effect due to the pipette 1 being sheared between the insertion portion 2a and the detail 2b of the cylindrical body 2, particularly the front end thereof. It is considered that the length is defined by the length of the boundary, and the longer one is preferable. On the other hand, if the length is too long, the pipette and the tool do not fit in the preferable size. 0.5 mm, more preferably 2 to 4 mm, still more preferably 2.5 to 3 mm. If the contribution of the major axis direction component of the boundary length is ignored, the maximum value on the major axis of the ratio of the detail 2b occupying the outer circumference (100% for the whole circumference type) and the outer circumference length are simply Obtained by product.

  The length of the push rod 4 is preferably 60 to 250 mm, more preferably 80 to 180 mm, and still more preferably 90 to 130 mm. Alternatively, the push bar 4 is preferably 20 to 90 mm, more preferably 30 to 75 mm, and still more preferably 40 to 60 mm longer than the cylinder 2. When the value falls below the lower limit of the numerical range, the one-stroke capacity is too small to reduce the work efficiency, and when the value exceeds the upper limit, it becomes difficult to handle.

  When airtight at the tip airtight portion 4a of the push rod 4, the diameter is preferably 1 to 5.5 mm, more preferably 2 to 4 mm, and still more preferably 2.4 to 3 mm. If the pipette 1 is below the lower limit of the numerical range, the suitable pipette 1 cannot secure a sufficient internal volume, resulting in poor work efficiency and increased risk of clogging of the contents. Neither is preferred. Further, the difference obtained by subtracting the inner diameter of the pipette 1 to be used from the maximum outer diameter of the tip hermetic portion is preferably 0.01 to 0.19 mm, more preferably 0.03 to 0.12 mm, still more preferably 0.04 to 0.09 mm. When the value is below the lower limit of the numerical range, the airtightness cannot be sufficiently maintained, and when the value exceeds the upper limit, it becomes difficult to smoothly slide in the pipette.

  When the push rod 4 is not hermetically sealed by the distal end airtight portion 4a, the diameter of the push rod 4 is preferably in the same range as the distal end airtight portion 4a for the same reason. When the push rod 4 is hermetically sealed at the tip hermetic portion 4a, the clearance between the inner diameter of the cylindrical body 2 and the diameter of the rear sliding portion 4b of the push rod 4 is preferably 0. It is 01-0.2 mm, More preferably, it is 0.02-0.15 mm, More preferably, it is 0.03-0.1 mm. If the value falls below the lower limit of the numerical range, sliding will not be smooth, and if the value exceeds the upper limit, the push rod will become more uneven and difficult to operate precisely, which is not preferable.

  Moreover, the length of the front-end | tip airtight part 4a of the push rod 4 becomes like this. Preferably it is 1-25 mm, More preferably, it is 2-15 mm, More preferably, it is 3-10 mm. When the value is below the lower limit of the numerical range, the airtightness becomes unstable, and when the value exceeds the upper limit, the sliding resistance becomes too large.

  As shown in FIG. 14, the tip airtight portion 4 a of the push rod 4 has a substantially cylindrical side surface shape as shown in FIG. 1, rather than being in close contact with the inner wall of the replaceable tubular pipette 1. A configuration in which the middle portion of the distal end airtight portion 4a is recessed and does not partially contact the inner wall of the replaceable cylindrical pipette 1 is preferable because excessive sliding friction is reduced. In the example of FIG. 14, the front end portion and the rear end portion of the front-end airtight portion 4a are in contact with the inner wall of the replaceable tubular pipette 1 at two locations, but the present invention is not limited to this. But it may be more than three. In other words, it is preferable to sandwich one or more non-hermetic portions of the tip hermetic portion 4a. The length of the non-hermetic portion is preferably 0.01 to 20 mm, more preferably 0.3 to 8 mm, and still more preferably 1 to 4 mm. If the value falls below the lower limit of the numerical range, the sliding friction reduction effect may be reduced. On the other hand, if the value exceeds the upper limit, the tip hermetic portion 4a may become too long and waste may occur. Furthermore, it is preferable that the corner portion that comes into contact is rounded with an R. In addition, the length of continuous contact in the long axis direction is preferably 0.1 to 1 mm, more preferably 0.2 to 0.7 mm, particularly in the case of a configuration that contacts the pipette at a plurality of locations. More preferably, it is 0.3-0.5 mm. If the value falls below the lower limit of the numerical range, the airtightness may decrease. On the other hand, if the value exceeds the upper limit, sliding friction with the inner wall of the replaceable tubular pipette 1 may increase, and smooth operation may be difficult. Yes, neither is preferred.

Whether or not it is airtight may be determined by whether or not the outer diameter of the part exceeds the inner diameter of the inner wall of the replaceable cylindrical pipette 1.
The total length of the replaceable tubular pipette 1 is preferably 30 to 100 mm, more preferably 40 to 85 mm, and still more preferably 45 to 70 mm. When the value falls below the lower limit of the numerical range, a sufficient internal volume cannot be secured, resulting in poor working efficiency. When the value exceeds the upper limit, the operation is too long and the operability is lowered.

  The inner diameter of the pore 1a of the replaceable cylindrical pipette 1 is preferably 0.55 to 7.8 mm, more preferably 0.61 to 0.72 mm, and still more preferably 0.64 to 0.68 mm. When the value falls below the lower limit of the numerical range, it becomes difficult to discharge the contents, and when the value exceeds the upper limit, the contents leak, which is not preferable.

  The inner diameter of the tubular portion 1c of the replaceable tubular pipette 1 is preferably 1 to 5.5 mm, more preferably 2 to 4 mm, and still more preferably 2.4 to 3 mm. If the value falls below the lower limit of the numerical range, a sufficient internal volume cannot be ensured, resulting in poor working efficiency and an increased risk of clogging of the contents. .

  In the present invention, the inner diameter of the cylinder portion 1c is a replaceable cylinder excluding the vicinity of the opening 1d when there is a front end pore 1a or the vicinity thereof, or a rear end step 1c2 which will be described later. The inner diameter of the substantially cylindrical portion that occupies a majority of the total length of the pipette 1 and has a constant thickness is exclusively indicated.

  The inner diameter of the tubular portion 1c of the replaceable tubular pipette 1 is preferably 1 to 6.5 mm, more preferably 2 to 5 mm, and still more preferably 2.3 to 3 mm. When the value falls below the lower limit of the numerical range, a sufficient internal volume cannot be secured, resulting in poor working efficiency, and when the value exceeds the upper limit, the operability is deteriorated because it is too thick.

  The wall thickness of the tubular portion 1c of the replaceable tubular pipette 1 is preferably 0.15 to 1 mm, more preferably 0.25 to 0.7 mm, and still more preferably 0.35 to 0.5 mm. If the value falls below the lower limit of the numerical range, the strength may be too low and the strength may be lowered. If the value exceeds the upper limit, the adhesion and fixing property with the operation tool is lowered, which is not preferable.

  The diameter of the opening 1d is substantially the same as that of the cylindrical portion 1c, but the inner diameter of the cylindrical portion 1c increases toward the rear end in order to facilitate connection with the operation tool of the present invention, as shown in FIG. Since it is preferable to provide the rear end step 1c2, it may be slightly larger. This step may be a right-angle step encounter, or a straight or curved slope.

The distance from the position of the rear end step 1c2 to the rear end is preferably 4 to 20 mm, more preferably 6 to 15 mm, and still more preferably 8 to 12 mm.
The size of the step is preferably 0.04 to 0.16 mm, more preferably 0.06 to 0.14 mm, and still more preferably 0.08 to 0.12 mm. In order to fix other than that, no structural device is required on the pipette side, and for example, a screw structure, a hinge structure, a complicated fitting-type fixing mechanism or the like is not required.

  The internal volume of the replaceable cylindrical pipette 1 is not particularly limited, but is preferably 0.05 to 0.8 ml, more preferably 0.1 to 0.6 ml, still more preferably 0.2 to 0.4 ml. It is. When the value falls below the lower limit of the numerical range, the volume is too small, which is inconvenient. When the value exceeds the upper limit, the length and thickness of the pipette need to be excessively increased due to the wrinkle, resulting in inconvenience and trouble in operation. There is a fear, both are not preferred.

DESCRIPTION OF SYMBOLS 1; Pipette 1a; Pore 1b; Pore taper part 1c; Cylindrical part 1c1; Tip contact part 1c2; Rear end step 1d; Opening part 2; Cylindrical body 2a; Insertion part 2b; 2b '
2c; jacket portion 2c1; front end portion 2c2; finger pulling portion 2d; cylinder 0-ring portion 2e; cylinder side projection 3; fastener 3a1; detail side inner surface 3a2; adjacent detail side inner surface 3b; Detail side inclined part 3c2; Adjacent detail side inclined part 3d; Fastener side protrusion 4; Push rod 4a; Tip airtight part 4a1; Insert introduction part 4a2; Step buffering inclined part 4b; Rear sliding part 4c; 5; Spring

Claims (7)

Operation to operate a replaceable cylindrical pipette (1) having a pore (1a) at the front end, a cylindrical portion (1c) capable of storing contents at the rear end, and an opening (1d) at the rear end Tools,
The operating tool has at least a cylindrical body (2), a fastener (3), and a push rod (4),
The cylindrical body (2) has an insertion portion (2a) having an outer diameter that can be inserted into the replaceable cylindrical pipette (1) at least substantially at the front, and the insertion portion (2a) In a partial range in the long axis direction, the outer diameter of the cylindrical body in at least a partial range of the outer periphery has a detail (2b) in which the rear portion is smaller than the front portion and is in an original thin state,
The fastener (3) has a substantially cylindrical shape, is fitted into the insertion portion (2a), has an inner diameter that can be freely slidable at least in a part thereof, and slides the details ( 2b) can be sandwiched to fix the replaceable cylindrical pipette (1),
The push rod (4) penetrates the cylindrical body (2), can be slid inside the cylindrical portion (1c), and is at least on the long axis of the push rod (4). A part of the range is airtight on the inner surface of the cylindrical portion (1c) and / or the inner surface of the cylindrical body (2), and the contents of the pipette (1) can be operated to be freely discharged and sucked. An operation tool for operating a replaceable cylindrical pipette.   2. The adjacent detail (2 b 1) having a smaller degree of the original narrower than the detail in a cross section obtained by cutting a portion having the detail (2 b) of the cylindrical body (2) perpendicularly to the long axis. An operation tool for operating the described replacement-type cylindrical pipette.   The operation tool for operating a replaceable tubular pipette according to claim 1 or 2, wherein at least a part of the detail (2b) reaches and penetrates the inner surface of the cylindrical body (2).   2. The operating tool for operating a replaceable cylindrical pipette according to claim 1, wherein the details (2b) of the cylindrical body (2) extend over the entire circumference.   A substantially distal end portion of the push rod (4) has a distal end airtight portion (4a) capable of air-tightly sliding with respect to the inner surface of the pipette (1), and a substantially subsequent portion of the distal end airtight portion (4a). The operating tool for operating the replaceable cylindrical pipette according to any one of claims 1 to 3, wherein the rear sliding portion (4b) is smaller in diameter than the tip airtight portion (4a).   6. The operating tool for operating a replaceable tubular pipette according to claim 1, wherein the fastener (3) is crimped forward by an elastic material (5).   A replaceable cylindrical pipette (1) having a pore (1a) at the front end, a cylindrical portion (1c) capable of storing contents at the rear portion, and an opening (1d) at the rear end, The vicinity of the opening (1d) can be deformed by an operation tool and can be tightly fixed tightly. Even if the contents of the pipette (1) are taken in and out freely, the pipette (1) can be removed from the operation tool. A replaceable cylindrical pipette characterized by having a flexibility that allows airtight and tight fixing so that the contents do not leak from between the operation tools.

Images