JPH0459016B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a dispenser whose dispensing volume can be continuously and variably set.

(Prior Art) Among this type of hand-held dispenser or micropipette with a structure suitable for dispensing, variable capacity types are also commercially available. These devices require the capacity to be set in advance, and are designed to be able to collect twice the amount of liquid that has been determined.

(Technical issue) However, since all the dispensed liquid is discharged in one operation, a new liquid must be aspirated each time one dispensing is performed.

The present invention solves the above-mentioned problems, and its purpose is to be able to aspirate a required amount of liquid at once and dispense the liquid in fixed amounts in several batches, and also to be able to arbitrarily control the volume of the liquid to be dispensed. The object of the present invention is to provide a variable capacity continuous dispenser that can be set.

(Technical Means) The purpose is to connect a cylinder 2 that aspirates or dispenses liquid, which communicates with an opening 1 at the tip of the main body, and a piston 3 fitted into the cylinder, so that the main body can be reciprocally movable and have an external A shaft rod 4 is provided so as to be operable, and the shaft rod 4 is fitted into the shaft rod 4 so as to be tiltable, engages with the shaft rod 4 when tilting, and constantly receives a return force from a first spring 5 provided between the main body and the shaft rod 4. The push-down member 6 and the main body on the side of the shaft rod 4 are provided so as to be reciprocally movable. The dispensing shaft and the dispensing shaft 8 receive a return force from the second spring 7 provided between the dispensing shaft and the dispensing shaft 8
This is achieved by a variable capacity continuous dispenser equipped with a dispense amount setting means 9 for determining the stroke of the dispenser.

(Example) The following will be explained with reference to the drawings.
The illustrated example is a dispenser equipped with only one tip 15, and FIG. 3 is an example of a dispenser equipped with a plurality of tips 15. These differ in the number of cylinders 2 and pistons 3 related to suction and dispensing capacity, but
The main parts such as the dispensing amount setting means can be made common.

A shaft rod 4 communicating with a piston 3 sliding in the cylinder 2 is reciprocatably incorporated so as to axially pass through a vertically elongated tubular dispenser body 20, and has a single tip 15 as shown in FIG. In the example, a coaxial piston 3 is connected to the tip, and in the example shown in FIG.
is connected. 16 is a cylinder cover having a movement space 17 for the connecting means 14; 18 and 19 are bearing parts above and below the shaft rod; 21 is a suction knob at the upper end of the shaft rod;
Reference numerals 2 and 23 indicate sealing means that come into sliding contact with the piston 3, and 40 indicates a retaining ring of the shaft rod 4.

The push-down member 6 fits into the shaft rod 4 so as to be tiltable, and when tilted, engages with the shaft rod 4 and becomes integrated with the shaft rod 4. Therefore, the upper surface side of the fitting hole 10 has a large diameter portion. It is formed into a tapered shape. The member 6 is movable in the axial direction while being constantly biased in the return direction by the first spring 5 in the upper space 24 in the main body, but the notch 2 prevents the member 6 from rotating around the axis.
5, it is locked to a stop pin 26 provided on the main body side. 27 is a spring bearing for the first spring 5, and 28 is a sealing means for the shaft rod 4.

The dispensing shaft 8 is provided on the main body 20 on the side of the shaft rod 4 so as to be able to reciprocate in parallel with the shaft rod 4. It is constantly receiving a restoring force from the built-in second spring 7. 29 is a collar for preventing the shaft 8 from slipping out;
It locks onto the member 30 at the proximal end of the main body from the inside. The illustrated dispensing shaft 8 has a threaded part 31 in the middle part, to which a stop ring 11 is screwed, and when the ring 11 is rotated, it connects with the stopper 12 located at the lower end of the ring movable chamber 32. The interval can be changed.

In addition to a stop ring 11 and a stopper 12, the dispensing amount setting means 9 is provided with an adjusting means 13 for turning the stop ring 11, and this adjusting means 13 is incorporated so as to form a part of the circumferential surface of the main body. It has internal teeth 34 on the inside that are screwed together with the outer peripheral gear 33 of the stop ring 11 (seventh
(see figure). 35 is an upper stopper that defines the upper limit of the stop ring 11. 36 is a scale provided on the outer periphery of the adjusting means 13, 37 is an indicator, and 38 is a knob at the upper end of the dispensing shaft, which has a guide surface 39 that comes into sliding contact with the side surface of the upper bearing portion 18. The setting means 9 is a means for adjusting the stroke of the dispensing shaft 8, and the specific configuration can be changed as appropriate. For example, the setting means 13
A method in which the stop ring 11 is directly operated without using the stop ring 11 may also be adopted.

(Function) The function of the present invention configured as above will be explained together with how to use it. When not in use or in operation, the push-down member 6 does not tilt and is activated by the first spring 5 as shown in FIG. 4, for example. It is at the upper limit of the movable range, and the dispensing shaft 8 is also at the upper limit due to the second spring 5, and the shaft rod 4 is at an arbitrary movable range.

When aspirating liquid, push the shaft 4 toward the tip as far as it can go, and then press the suction knob 2 from that position.
1 (FIG. 5, chain line), liquid can be filled into the cylinder 2 from the tip end. The operation is the same in the case of a single cylinder small capacity as in the example of FIG. 2, and in the case of a multi-cylinder large capacity as in the example of FIG.

When dispensing, the amount to be dispensed is set by operating the adjusting means 13. In the maximum case, the entire amount in the cylinder can be poured out in one operation, and in the minimum case, only a fraction of that amount can be poured out.
It is adjusted accordingly. That is, when the adjusting means 13 is operated, the stop ring 11 moves in the axial direction within the movable chamber 32 due to the engagement between the internal teeth 34 and the gear 33, so that the distance between the ring 11 and the stopper 12, that is, the stroke, changes. 4 and 5 show the stop ring 11 in a position where the maximum stroke can be obtained, and FIG. 6 shows the stop ring 11 in a position lowered by about one-third. When the dispensing knob 38 is pushed in at any position, the piston 3 moves by the adjusted stroke and the corresponding amount of liquid is dispensed, so the liquid can be dispensed in fixed amounts in several batches. .

The receiver that receives the liquid after dispensing is usually 8 rows x 12 rows.
96 holes, 24 holes in 6 columns x 4 rows, and 12 holes in 3 columns x 4 rows are often used, but the 6 holes illustrated in FIG. 3 is convenient for these. In order to dispense into 3 columns x 4 rows with a 6-tip dispenser, only 4 tips 15 need to be used since the cylinder and piston are independent.

(Effects) The present invention is configured as described above, and the required amount of liquid is aspirated at one time, and the aspirated liquid is accurately divided into several portions by the amount set by the dispensing amount setting means. It has many remarkable effects, such as being extremely easy to work with since it can be filled with water, and being extremely convenient and efficient since the capacity setting can be adjusted continuously.

[Brief explanation of drawings]

The drawings relate to the present invention; FIG. 1 is a front view of the first embodiment, FIG. 2 is a vertical cross-sectional view, FIG. 3 is a cutaway front view of the cylinder peripheral portion of the second embodiment, and FIGS. 6 is an enlarged sectional view of the device in use, FIG. 7 is a sectional view taken along the line of FIG. 4, and FIG. 8 is a sectional view taken along the line of FIG. 4. DESCRIPTION OF SYMBOLS 1...Opening part, 2...Cylinder, 3...Piston, 4...Shaft rod, 5...First spring, 6...Pushing member, 7...Second spring, 8...Dispensing shaft , 9...
Dispense amount setting means.

Claims (1)

[Scope of Claims] 1. A cylinder 2 that aspirates or dispenses liquid and communicates with an opening 1 at the tip of the main body, and a piston 3 fitted into the cylinder, so that it can be reciprocated with the main body and can be operated externally. A pusher is fitted into the shaft rod 4 so as to be tiltable, engages with the shaft rod 4 when tilting, and receives a constant return force from a first spring 5 provided between the main body and the shaft rod 4. The member 6 and the main body on the side of the shaft rod 4 are provided so as to be reciprocally movable, and the distal end abuts the push-down member 6 at a position where it is tilted, and the other end is located at the proximal end of the main body. A variable capacity continuous dispenser comprising a dispensing shaft that receives a return force from a second spring 7 provided between the dispensing shafts and dispensing amount setting means 9 that determines the stroke of the dispensing shaft 8. 2. The variable capacity continuous dispenser according to claim 1, wherein the push-down member 6 has a fitting hole 10 having a large diameter portion to be fitted to the shaft rod 4 in a tiltable manner. 3. The dispensing amount setting means 9 includes a stop ring 11 provided on the dispensing shaft 8, a stopper 12 on which the ring 11 comes into contact, and a means 13 for adjusting the stroke of the dispensing shaft 8 by changing the position of the stop ring 11 or the stopper 12. 2. The variable capacity continuous dispenser according to claim 1. 4. A plurality of cylinders 2 communicating with the opening 1 are provided, the same number of pistons 3 are fitted into each cylinder 2, and each piston 3 is attached to the shaft rod 4 via a connecting means 14. Variable capacity continuous dispenser according to item 1. 5. The variable capacity continuous dispenser according to claim 1, wherein a tip 15 for suction and dispensing is detachably attached to the opening 1.