JPS594649B2 - Repeat dispenser - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to liquid metering dispensing devices, particularly of the type named repeat dispenser.

A repeat dispenser sucks a relatively large amount of liquid in one suction operation, and repeatedly discharges a relatively small and predetermined amount of liquid in each discharge operation. It is widely used for various purposes such as , testing, etc. The object of the present invention is to provide a repeat dispenser with a simple structure, easy to operate, and easy to adjust the amount dispensed each time.

The liquid dispenser according to the present invention includes a tubular main body, a nearly cylindrical operating cylinder having an operating button at the upper end that protrudes from the upper end of the main body and is slidable within the main body, and a substantially cylindrical operating cylinder that presses the operating cylinder upward. a spring, a spring receiver slidably provided within the main body to transmit the spring force of the spring to the operating cylinder, and a stopper that comes into contact with the spring receiver during normal operation and restricts the position of the spring receiver within the main body; a pawl hinged to a spring receiver; a pawl spring that presses the pawl in one radially outward direction of the main body; and a pawl spring that is provided slidably in the vertical direction along one side of the main body and has the pawl on the inner surface thereof. a rack shaft having teeth that can be engaged with the lock shaft; a device that releases the engagement between the pawl and the rack shaft when the spring receiver is in contact with the stopper; an inlet button and a cylinder piston device provided and connected to the rack shaft; a first connector removably connecting the cylinder of the cylinder piston device to the lower end of the body; and a first connector for removably connecting the cylinder of the cylinder piston device to the lower end of the rack shaft; and a removably coupled second connector. Preferably, the inner cylinder is concentrically and rotatably connected to the operating cylinder, and a device for adjusting the relative rotational position of the operating cylinder and the inner cylinder is provided, and the lower end of the inner cylinder is divided in the cylindrical direction. A plurality of steps are provided, and the tubular body includes a second stopper that engages with one of the plurality of steps when the operating cylinder is pressed down, thereby regulating the downward stroke of the operating cylinder. is provided.

Embodiments of the invention will now be described with reference to the accompanying drawings.

In the figure, reference numeral 10 denotes a tubular main body, which has a finger hook 11 projecting laterally on one side of its upper end, and preferably has a vertical groove 12 on the other side of the finger hook 11 as shown clearly in FIG. It is provided in the upper half as a recessed part. A semicircular guide surface 13 and a flat guide surface 14 are formed on the inner surface of the body 11 in the area where the longitudinal groove 12 is provided. Main body 11
A partition wall 15 having a hole 16 is provided at the central portion in the longitudinal direction. An operating cylinder 20 having an inner cylinder 30 is slidably fitted into the main body 11, and the operating cylinder 20 is guided and positioned by a guide surface 14 and a guide 40 to be described later.

The upper end of the operating cylinder 20 protrudes above the main body 11,
Its upper end surface constitutes an operation button together with the upper end surface of the inner cylinder 30 and the finger rest 21. An adjusting ring 31 splined to the inner cylinder 30 is housed in a notched groove 23 provided in the operating cylinder 21, and at least a portion of the side surface of the adjusting ring 31 (approximately 2/3 of the circumference in the illustrated embodiment) is notched. It is exposed to the outside from the groove 23. Markers 24 and 32 are provided to identify and clearly indicate the rotational position of the inner cylinder 30 with respect to the operating cylinder 20, and a ball 24 and a ball pressing spring 26 are also provided on the operating cylinder 20 to indicate the rotational position of the inner cylinder 30.
Positioning is performed by engaging with a recess 38 provided at 0. The inner cylinder 30 is the cylindrical inner surface 2 of the operating cylinder 20.
7, and has a cylindrical outer surface 32 that rotationally fits into the seventh
As shown in the developed view of the figure, a plurality of stepped portions 33 to 37 are formed which are divided in the circumferential direction. The recess 38 is the stepped portion 33-3
7. The guide 40 is the upper end flange 4
1 is fixed to the upper end of the main body 10, and a stopper 42 is formed at the lower end to protrude radially inward. The stroke of the operating cylinder is limited by engagement with one of the cylinders.

A notch 2 for a stopper 42 is provided at the lower end of the operating cylinder.
8 is provided. A spring receiver 50 is provided so as to be slidable while being guided by the inner surfaces 13 and 14 of the main body 10, and is disposed between the partition wall 15 and the spring 51. ) and the lower end of the operating cylinder 20.

The spring receiver 50 is provided with a notch 52 , and a pawl 53 hingedly connected to the spring receiver 50 makes a hinge movement within the notch 52 . The pawl spring 54 moves the pawl 53 counterclockwise in FIG.
The tip of No. 3 is pressed radially outward. The pawl 53 extends downward through a hole 16 provided in the bulkhead 15, and when it is not in normal operation, the pawl 53 engages with the edge of the hole 16 to hold the pawl 53 in a position away from the shaft shaft 45 (described later). do. A vertical groove 17 is provided on the inner surface of the lower half of the main body 10, and a rack shaft 45 having rack teeth 46 on the inner surface is slidably provided within the vertical groove 17. The vertical groove 17 communicates with the vertical groove 12, and the upper end of the shaft 45 is supported by the vertical groove 12 in the normal non-operating position shown in FIG. A suction button 47 is connected to the upper end of the rack shaft 45 and is movable in the vertical direction within the vertical groove 12. A first connector 60 is fixed to the lower end of the main body 10, a second connector 65 is connected to the lower end of the rack shaft 45, and the second connector 65 slides within the lower half of the main body 10.

The connectors 60 and 65 are respectively provided with U-shaped grooves 61 and 66 that open in one side direction (right side in FIG. 3), and the upper end flange 72 of the cylinder 71 of the cylinder piston device 70 and the upper end of the piston 73. The flanges 74 are each removably accommodated. The piston 73 has a piston portion 75 having an O-ring 76 . In the illustrated embodiment, the cylinder piston device 70 has a substantially cylindrical cylinder portion 7.
7 and a tapered part 79 which moves within a tapered nozzle part 78, but includes flange parts 72, 74 which removably fit closely into the U-shaped grooves 61, 66. It may be in any format as long as it has one. In the figure, 19 is a cover.

When in use, the tip of the nozzle 78 is placed in, for example, a reagent bottle, and the suction button 47 is pushed along the vertical groove 12.

At this time, the pawl 53 is separated from the rack teeth 46 of the rack shaft 45, so the suction button 47 can be freely pushed up and down.
3 moves up and down inside the cylinder J and V, and even if air is sucked into the cylinder, it can be completely exhausted. Once the desired amount of drug solution has been aspirated into the cylinder (usually with the inhalation button 47 at the uppermost position in the groove 12), the dispenser should be used to dispense from the reagent bottle into a test tube. Move and press down on the operation button with your finger. The operation cylinder 20 and the inner cylinder 30 push down the spring receiver 50 against the force of the spring 51 while pushing down the step 3 at the lower end of the inner cylinder 30.
3 to 37 and the upper surface of the stopper 42 (second stopper). During this movement, the claw 5 supported by the spring receiver 50
3 also moves downward, the edge 16a of the hole 16 in the partition wall 15 and the pawl 53 are separated, and the pawl 53 is swung counterclockwise by the pawl spring 54 and engages with the tooth 46 of the shaft shaft 45. .
As the claw 53 descends 5 thereafter, the rack shaft 45
moves downward, and the piston 73 also descends accordingly,
A predetermined small amount of drug solution is discharged and dispensed. When the operating button is released, the operating cylinder 20, inner cylinder 30, spring receiver 50, and pawl 53 are raised by the force of the spring 50, but the O-rack shaft 45 remains in the depressed position. By repeatedly pressing down and releasing, a predetermined amount of the chemical solution is repeatedly dispensed, and the shaft 45, connector 65, and piston 73 gradually descend toward the illustrated position. To discharge the medicinal solution inhaled into the cylinder during the repeated dispensing operation, it is sufficient to simply press down the inhalation button 47 with the operation button released.

The cylinder device 70 can be removed from the grooves 61 and 66 by moving it to the right in FIG. 3 relative to the main body 10, and can therefore be made into a disposable type.
It is also possible to vary the diameter and therefore the volume of the cylinder.

As mentioned above, the amount dispensed each time is limited by the distance between the steps 33 to 37 at the lower end of the inner cylinder and the top surface of the stopper 42, and to change the amount dispensed, use the adjusting ring 3.
1 with a finger to rotate the inner cylinder 30 within the operation cylinder 20. In one preferred embodiment, the cylinder capacity is 0.5 m, 11.25 m, and 5111 for the normal maximum stroke of the suction button 47. By rotating the adjustment nut 31, the amount dispensed each time can be changed to 0.01, 0.02, 0.03, 0.04, respectively.
,0.05m1;0.025,0.05,0.075,
0.1,0.125m1:0.1,0.2,0.3,0
．． 4,0.5m1; Therefore, the number of times of dispensing is 50,25,16
, 12, 10 times auspicious.

The repeat dispenser according to the invention is compact and easy to handle, and the single aspiration volume and each repeat dispensing volume can be widened by changing the cylinder-piston device and by adjusting the adjustment ring. The range can be easily changed.

[Brief explanation of the drawing]

FIG. 1 is an external front view of a liquid dispenser according to the present invention. 2 is a sectional view of the liquid dispenser of FIG. 1 taken along line 1 of FIG. 3; FIG. FIG. 3 is a cross-sectional side view of FIG. 1, with the cylinder piston device removed. FIG. 4 is an enlarged top view of the liquid dispenser of FIG. 1. FIG. 5 is an enlarged sectional view taken along line v-v in FIG. 3. FIG. 6 is an enlarged sectional view taken along the line - in FIG. 3. 7th
The figure is a developed view showing the stepped portion. 10: Main body, 20: Operation cylinder, 51: Spring, 50: Spring receiver, 42: Stopper, 5
3: Claw, 54: Claw spring, 45: Luxury shaft, 15:
Partition wall, 16: hole, 16a: edge of hole (shoulder), 12: vertical groove, 47: suction button, 70: cylinder piston device, 6
0: first connector, 65: second connector, 71: cylinder, 73: piston, 30: inner cylinder, 31: adjustment ring, 33 to 37: step, 61, 66: groove, 72,
74: flange, 24: ball, 24: ball pressing spring,
38: Concavity.

Claims (1)

[Scope of Claims] 1. A tubular main body, a substantially cylindrical operating cylinder having an operating button at its upper end that protrudes from the upper end of the main body and capable of sliding within the main body, and a spring that presses the operating cylinder upward. a spring receiver slidably provided within the main body for transmitting the spring force of the spring to the operating cylinder; a stopper that comes into contact with the spring receiver during normal operation to regulate the position of the spring receiver within the main body; a pawl that is hinged to the receiver; a pawl spring that presses the pawl in one radially outward direction of the main body; and a pawl spring that is slidably provided in the vertical direction along one side of the main body and that includes the pawl and the pawl on the inner surface thereof. a rack shaft having engageable teeth; a device for releasing the engagement between the pawl and the rack shaft when the spring receiver is in contact with the stopper; and a device capable of sliding in a vertical groove provided on the side surface of the main body. a first connector for removably connecting the cylinder of the cylinder-piston device to the lower end of the main body; a first connector for removably connecting the cylinder of the cylinder-piston device to the lower end of the main body; a second connector removably coupled to a lower end of the dispenser. 2. The first connector is provided with a groove having a generally U-shaped planar configuration that removably engages a radial flange provided at the upper end of the cylinder of the cylinder-piston device; a substantially U removably engaged with a radial flange on the upper end of the piston of the device;
2. The repeating dispenser according to claim 1, further comprising a groove having a letter-shaped planar shape and slidable within said main body. 3. A device for releasing the engagement between the pawl and the rack shaft is constituted by a slope provided on the pawl and a shoulder provided on the inner surface of the main body, and when the operation cylinder is pressed down, the pawl is released together with the spring receiver. When descending, the ramp moves away from the shoulder and the pawl moves radially outward to engage the rack shaft and push it down.
Repeat dispenser as described in section. 4. A tubular main body, a substantially cylindrical operating cylinder that has an operating button at its upper end that protrudes from the upper end of the main body and is slidable within the main body, a spring that presses the operating cylinder upward, and a spring for the spring. a spring receiver slidably provided within the main body for transmitting force to the operating cylinder; a stopper that abuts the spring receiver during normal operation and regulates the position of the spring receiver within the main body; and a stopper hinged to the spring receiver. a pawl, a pawl spring that presses the pawl in one radially outward direction of the main body, and a pawl spring that is slidably provided in the vertical direction along one side of the main body and has teeth on its inner surface that can engage with the pawl. a rack shaft, a device that releases the engagement between the pawl and the rack shaft when the spring receiver is in contact with the stopper, and a rack shaft that is slidably provided in a vertical groove provided on the side surface of the main body. a first connector removably connecting the cylinder of the cylinder piston device to the lower end of the body; and a first connector removably connecting the cylinder of the cylinder piston device to the lower end of the rack shaft. a second connector, the inner cylinder being concentrically and rotatably connected to the operating cylinder;
A device is provided for adjusting the relative rotational position of the operating cylinder and the inner cylinder, and the lower end of the inner cylinder is provided with a plurality of steps divided in the circumferential direction, and the tubular body is provided with a device for adjusting the relative rotational position of the operating cylinder and the inner cylinder. 2. A repeat dispenser, characterized in that a second stopper is provided which limits the downward stroke of the operating cylinder by engaging one of the plurality of steps when the operating cylinder is pressed. 5. A device for regulating the relative rotational position of the operating cylinder and the inner cylinder includes an adjustment ring connected to the inner cylinder and operable exposed from one side of the operating cylinder, and a plurality of recesses provided on the outer surface of the inner cylinder. 5. A repeating dispenser according to claim 4, further comprising: a ball that fits into one of the recesses in response to a predetermined rotational position of the inner cylinder; and a ball compression spring. .