KR100624491B1 - Pipette of Pencil Type - Google Patents

Abstract

The present invention relates to a pencil-like pipette, and more particularly, a receiving portion is formed therein, a cylindrical body having an opening formed at one end thereof, a pressing portion installed inside the receiving portion and protruding to the outer circumferential surface thereof, and the pressing And a tip connecting member coupled to the opening to suck and discharge a liquid sample by the piston, wherein the piston is disposed on the outer circumferential surface of the body. It is characterized in that it is provided with a pressing member for applying a force to the user, and an arm coupled to the pressing member by a hinge and connected to the piston.

According to the present invention, since the suction and discharge of the liquid sample by holding the lower side of the body there is an effect that the operation can proceed very easily. That is, it is possible to manipulate the pressing portion with the thumb in the state of grasping the body to prevent the pipette from flowing finely. It also has useful features for micromanipulation under a microscope.

Pipette, precision, fine

Description

Pipette of Pencil Type

Figure 1 shows a side view of a conventional pipette used in the prior art,

Figure 2 is a side cross-sectional view showing a preferred embodiment of the pencil pipette of the present invention,

Figure 3 is a side view according to the pencil pipette of the present invention.

Figure 4 is a view showing another embodiment according to the pencil pipette of the present invention.

Explanation of symbols on the main parts of the drawings

10: body 11,41: opening

12: groove 13: long hole

14: partition 14a, 14b: protruding support

15: position moving member 16: receiving portion

17: guide hole 18: operating lever

19: tip separating member 20: pressed part

21: pressure member 21 ': operation member

22: connecting member 22a: support arm

22b: pivot arm 23a, 23b, 23c: hinge means

24: elastic member 30: tip connecting member

40: conical end 42: filter

43: Packing 50: Tip

100: pencil pipette P: piston

R: load

The present invention relates to a pencil pipette, and more particularly, to provide stability to hands during suction and discharge of a liquid sample or a sample present in a liquid to prevent the pipette from flowing finely and to deliver a liquid sample quickly and accurately. It relates to a pencil pipette that allows.

A pipette is a measuring vessel for precisely measuring a constant volume of liquid. These measurement pipettes are largely divided into gas pipettes and liquid pipettes.

The gas pipette measures the volume of the gas, and the volume inside the container becomes a measured value, and the liquid pipette is a measured amount of suction or discharge of the liquid read out on the scale. Pipettes for measuring the volume of liquids include dedicated pipettes for measuring the total amount of liquid discharged up to the scale and scalpel pipettes for adjusting the discharge by the scale. In general, glass tubes with narrow ends are used, and materials such as polyethylene and fluorine resin are used.

Most of these pipettes are used for chemical experiments, and the medical system is mainly used to separate the collected blood in a certain amount.

1 is a side view of a standard manual pipette used in the prior art. As shown, the pipette 10 has a push button 14 connected to the rod 16 on a piston (not shown) located in the body or housing 18 of the pipette.

The push button 14 may be pressed by the user applying downward force to the push button causing the downward movement of the pipette piston. When this push button 14 is released, the amount of liquid to be sampled is sucked into the disposable pipette tip 20 which is releasably fixed to the lower end of the pipette tip mounting shaft 22 of the pipette 10. The sample can then be transferred into another container by once again pressing down on push button 14. After such use, it is common practice to extract the pipette tip 20 from the mounting shaft 22 and replace it with a new pipette tip for repeated operation of the pipette 10 in aspirating and dispensing fresh sample fluid. to be.

The pipette tip mechanism extractor 12 is employed to extract the tip 20 from the mounting shaft 22. In this regard, the mechanism 12 has a push button 24 connected to a rod located in a passage (not shown) provided in the upper portion of the handheld housing 18 of the pipette 10. The passageway and the rod are arranged to impart a translational motion parallel to the axis of the pipette against a spring (not shown) that normally forces the rod to an upward position. A removable tip extractor member or arm 26 having a tubular upper end extends from the lower end of the rod and terminates in the sleeve 28 along the entire outer contour of the pipette housing 18 from the rod.

The sleeve 28 surrounds the conical lower end 30 of the pipette tip mounting shaft 22, which tightly receives the upper end of the disposable pipette tip 20. To extract the pipette tip 20 from the lower end of the mounting shaft 22, the user grabs the pipette housing 18 and uses his or her thumb to push the push button 24 downwards. The downward force on the push button is translated by the rod into the tip extractor arm 26, and thus into the sleeve 28, which presses down on the upper end of the pipette tip. When the downward force transmitted by the sleeve 28 exceeds the friction force between the pipette tip 20 and the mounting shaft 22, the pipette tip is propelled from the mounting shaft. Upon release of the push button 24, with a sleeve slightly spaced from the upper end of the replacement pipette tip to be inserted onto the mounting shaft 22, with the pipette 10 ready for the next suction and dispensing action. The spring returns the tip extractor mechanism 12 to its normal position.

However, this standard manual pipette has a very large volume of the housing to be held by hand, and has a very long suction / discharge tube formed downward from the housing. Therefore, the problem of inferior positional accuracy, such as the pipette shakes in the process of sampling a certain amount of liquid and moving the pipette after inhalation to precisely and accurately place it in a specific position in the container or dispensing it to a plurality of containers. . This causes the user to grab the top of the pipette in the course of sampling the liquid, causing the hands and arms that are not supported on the floor to shake. Thus, the pipette flows finely, which makes it difficult to quickly and accurately sample or dispense the liquid from the microscopic specific microscopic location to another precise location.

In addition, the push button for sucking or discharging the liquid is located on the upper surface of the housing to increase the shake of the pipette described above.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a pencil pipette for the convenience of the operation of sucking and discharging a liquid sample, and to be able to transport the liquid sample quickly and accurately. have.

Pencil-shaped pipette of the present invention for achieving the above object is formed in the receiving portion therein, a cylindrical body having an opening formed at one end, the pressing portion is installed in the receiving portion and protruded to the outer peripheral surface, the pressing And a tip connecting member coupled to the opening to suck and discharge a liquid sample by the piston, wherein the piston is disposed on the outer circumferential surface of the body. A pressurizing member to which the user exerts a force and an arm coupled to the pressurizing member by a hinge and connected to the piston are provided.

The receiving portion according to the preferred embodiment of the pencil pipette of the present invention is characterized in that the elastic member is provided to be connected to the piston to push or pull the piston. In addition, if necessary, the pressing member may have a structure capable of sliding reciprocating relative to the body without being made of a hinge, thereby making it possible to have a hingeless structure.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the embodiment according to the present invention. In addition, the same reference numerals are assigned to components that perform the same function in the drawings.

As shown in Figures 2 and 3, the pencil pipette 100 of the present invention has a body 10, the pressing portion 20, and a tip connecting member 30.

The body 10 is formed in the longitudinal direction to have a cylindrical shape such as a pencil. An opening 11 is formed at one side of the body 10, and a recess 12 is formed at one side of the outer circumference toward the inside of the body 10. In addition, the recess 12 has a long hole 13 formed therein. In addition, a partition 14 is formed inside the body 10, which is located at the center of the recess 12. The partition 14 is provided with a protruding support 14a protruding in the direction of the opening 11. A thread is formed on the outer circumferential surface of the opening 11. Here, the position moving member 15 is provided inside the body 10, and the position moving member 15 is located in the other direction of the opening 11. In addition, a piston P is disposed in the body 10 adjacent to the opening 11.

The pressing portion 20 is located in the groove portion 12 and the receiving portion 16 of the body 10, it is composed of a pressing member 21 and the arms (22a, 22b). The pressing member 21 is located outside the recess 12 and has a hinge means 23a provided as a pin and a through hole at the center thereof. The hinge means 23a is connected to the ends of two arms 22a and 22b composed of a support arm 22a and a pivot arm 22b. The other end of the support arm 22a is connected to the positioning member 15 by a hinge means 23b. In addition, the pivot arm 22b is connected to one side of the piston P by a hinge means 23c. These arms 22 are located in the long hole 13 formed in the recess 12.

Meanwhile, an elastic member 24 is positioned between the piston P and the partition wall 14. The elastic member 24 is composed of a spring, one end is coupled to the protruding support 14a formed in the partition 14, the other side of the elastic member 24 is coupled to the piston (P). Here, the piston P is provided with a protrusion support 14b having the same shape as the protrusion support 14a. Both ends of the elastic member 24 are clamped or fixed, respectively. The elastic member 24 may be disposed in the other direction of the piston (P), may be disposed in both directions. According to the position where the elastic member 24 is disposed, the piston (P) can be moved automatically.

In addition, the guide hole 17 is formed outside the body 10. The guide hole 17 is formed along the longitudinal direction of the body 10 and has the same shape as the long hole 13 formed in the pressing portion 20. In addition, the long hole 13 is formed in a position rotated 90 ° in one direction of the outer peripheral surface of the body. In addition, an operating lever 18 is inserted into the guide hole 17 so as to reciprocate in the guide hole 17, and the operating lever 18 is coupled to the tip separating member 19. This tip separating member 19 is positioned to surround the outer circumferential surface of the tip connecting member 30 to be described later.

The tip connecting member 30 has a conical end portion 40 is formed on one side so that the tip 50 can be inserted. In addition, an opening 41 is formed at the other side of the conical end portion 40, and a thread is provided at an inner circumferential surface of the opening 41 to be screwed to the body 10. In addition, the tip separating member 19 described above is coupled to one end of the operation lever 18.

Meanwhile, the filter 42 and the packing 43 may be disposed at the position where the body 10 and the tip connection member 30 are screwed together. This filter 42 is to prevent the liquid is sucked / discharged quickly due to the operation of the pressing portion 20, so that a certain amount can be sucked and discharged.

In addition, the body 10 is provided with a control member (not shown) for adjusting the amount of liquid to be sampled, a scale is formed on one side of the outer peripheral surface of the body (10). The adjusting member is connected to the above-described positioning member 15 so that the positioning member 15 is moved within the body 10 due to the manipulation of the adjusting member. Therefore, the amount of liquid to be sampled can be controlled. In addition, the unit of the graduation may be provided according to the amount of the liquid used.

Operation of the pencil-shaped pipette of the present invention configured as described above is as follows.

First, the liquid is dispensed in a constant amount or the amount is adjusted with a control member prior to sampling a particular amount. At this time, when the positioning member 15 is moved within the body 10 due to the operation of the adjusting member and the operation of the adjusting member is finished, the positioning member 15 is no longer movable. Although not shown, it is possible due to a separate stopper or the adjusting member. After adjusting the suction amount of the liquid due to the operation of the adjusting member and the position shifting member 15, the tip 50 is inserted into the tip connecting member 30, and then the pressing portion 20 is pressed to the end. At this time, the piston (P) is in close contact with the filter 42 and in this state soaks a portion of the tip 50 in a container containing the liquid. Then, when the pressing portion 20 is released, the piston P is returned to its original position due to the elastic member 24. At this time, the liquid is present inside the tip 50 and in this state, the user moves the pencil-shaped pipette 100 to another container or a specific container, and then presses the pressing part 20 once again, thereby, inside the tip 50. The liquid in is discharged. The same liquid may be used as one tip 50, and when the plurality of liquids are to be sampled, the tip 50 may be replaced. Tip 50 replacement can be easily removed by pushing the operating lever (18).

On the other hand, another embodiment of the pencil pipette of the present invention will be described with reference to the accompanying FIG.

As shown in the figure, the overall configuration is similar to the pencil-like pipette 100 of the present invention described above, but is characterized in that the pressing member 21 described above is linearly reciprocated below. Hereinafter, only the description according to another embodiment will be described, and other configurations will be referred to the pencil-type pipette 100 of the present invention described above.

First, the piston (P) installed in the body 10 is connected to the positioning member 15, the rod (R) is provided in the positioning member (15). The rod R is connected to a member (not shown) for adjusting the capacity, and an operation member 21 'is positioned at one side of the position shifting member 15. In addition, the position shifting member 15 and the operation member 21 ′ are coupled to the connection member 22. In addition, the operation member 21 ′ is linearly reciprocated with respect to the body 10, and the position movement member 15 is oriented with respect to the rod R due to the reciprocation of the operation member 21 ′. Slide reciprocating. At this time, the piston (P) connected with the position moving member 15 is moved together to suck or discharge the liquid containing the cells.

On the other hand, the elastic member 24 may be located in one direction or both directions of the piston (P), respectively. Although shown in the figure to be located between the piston (P) and the filter 42, it may be located in the positioning member 15 in the other direction according to the embodiment. In addition, they may be provided in both directions, respectively. Due to the elastic member 24, the operation member 21 'including the piston P and the position shifting member 15 can automatically suck or discharge.

As described above, since the pencil-like pipette of the present invention is compact, lightweight, and provided in a pencil shape, it has very advantageous conditions for working under a microscope. In general, it is very inconvenient to use a conventional micropipette when obtaining or placing an accurate and very small amount under anatomical microscope, but the pencil pipette of the present invention has a very stable and convenient advantage.

In addition, the pipette of the present invention may be used as a tip for transporting the liquid provided in the front portion, but can also be mounted as a fine glass pipette drawn using a special adapter. Depending on the case of using a narrow and deep culture dish of the culture dish, the angled adapter can be mounted or the conical end portion 40 can be manufactured at a specific angle, which can add convenience to the work. It can be equipped with micro glass pipettes or other straws.

 As described above, the pencil-like pipette of the present invention has the following effects.

First, a piston and a pressing part for sucking and discharging liquid are provided inside the body, and the body is thinly formed in one direction like a pencil. Therefore, there is an effect that the operation can be very easily performed by holding the lower side of the body and inhaling / draining the liquid sample. In other words, the user can manipulate the pressed part with the thumb while holding the body and can transfer the material (liquid or cells mixed in liquid) to the stable position stably under precise conditions such as under a microscope.

Second, when the piston is released by pressing the pressing portion to allow the elastic member to be connected, the piston returns to itself. Therefore, there is an effect that any one of the processes of sucking or discharging the liquid is automatically performed.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical scope of the present invention, and such modifications and modifications belong to the appended claims.

Claims (2)

A cylindrical body having a receiving portion formed therein and an opening formed at one end thereof; A pressing part installed inside the receiving part and protruding to the outer circumferential surface of the body; A piston reciprocating in the horizontal direction in the receiving portion according to the operation of the pressing portion; A tip connection member coupled to the opening such that the liquid sample is sucked in and discharged by the piston; The pressing portion is disposed on the outer peripheral surface of the body and the user to apply a force to the force; A pencil pipette, which is coupled to the pressing member by a hinge and is provided with an arm connected to the piston so that the piston moves in the direction of the opening when the pressing part is pressed. The method of claim 1, The accommodating portion is provided with an elastic member to be connected to the piston, the pencil-shaped pipette, characterized in that for pushing or pulling the piston.

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