JPH0328945Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to an applicator with a valve that contains a liquid such as writing ink or cosmetic ink.

(Prior Art) While various applicators with a valve that contain liquid have been proposed, almost at the same time as the liquid storage chamber that stores the liquid is pressed and deformed, a part of the liquid storage chamber that is deformed is pressed into the liquid storage chamber. The applicator with a valve has a structure that allows liquid to be supplied under pressure to the pen tip by pressing the valve stem placed forward to open the valve, even when the liquid used is of high viscosity. It can be said that it is practical because it has the advantage that liquid can always be reliably supplied to the pen tip.

As this type of applicator with a valve,
As disclosed in the above publication, a valve is urged backward by a spring to press against a valve seat, and a valve stem connected to the rear of the valve is placed in an ink tank having a bellows part. There is a known structure in which the rear end of the ink tank is pressed and deformed with a dowel pin, and the valve stem is pushed forward almost simultaneously to open the valve. Each time, it was necessary to stop using the barrel, change the barrel, and press the knock pin at the rear end of the barrel, which was a so-called rear-end notch operation, which caused the problem that the operation was extremely troublesome.

(Purpose) The present invention was developed in view of the above-mentioned problems, and the valve stem is disposed within the liquid storage chamber in a part of the liquid storage chamber that is deformed almost simultaneously with the press deformation of the liquid storage chamber that stores the liquid. While taking advantage of the structure that allows liquid to be supplied under pressure to the pen tip by pressing forward to open the valve, it also has a barrel that allows for easy operation when supplying liquid to the pen tip during use. It is an object of the present invention to provide a valve-equipped applicator that is practical and has excellent operability by allowing the applicator to be used as it is without any changes.

(Structure of the invention) The present invention has a pen tip at the tip, a liquid storage chamber connected to the rear that has an elastic return force in the front and back direction that can be deformed by pressure, and a central shaft with a valve seat inside. The valve is brought into pressure contact with the valve seat by applying a spring between the valve body and the center shaft to urge the valve body backward with respect to the center shaft. The rear end of the valve body is arranged with a slight gap from the bottom of the liquid storage chamber, and the center shaft is disposed within the outer shaft having a pressing piece provided on the side wall. A tapered surface is provided on at least one of the pressing piece or the center shaft so that the pen tip protrudes, and the pressing piece and the center shaft are arranged so as to abut on this tapered surface portion, thereby, When the pressing piece is pressed inward, the contact position between the pressing piece and the center shaft on the tapered surface changes against the elastic return force of the liquid storage chamber, and the valve seat is relatively pressed against the valve. The gist is an applicator with a valve that opens the valve by retracting from the valve.

(Example) Hereinafter, the present invention will be described in detail based on an example shown in the accompanying drawings.

In FIG. 1, reference numeral 1 is a bottomed cylindrical outer shaft made of resin, metal, etc., and a pressing piece 3 having an inward protrusion 2 is provided on the front side surface of the outer shaft 1. As shown in Figure 2, two are provided symmetrically with respect to the axis. In the illustrated example, when the pressing piece 3 is integrally formed with the outer shaft 1, a U-shaped slit 4 is provided in the front part of the outer shaft 1 as shown in FIG. 1 may be provided with an appropriate number of through holes, and the pressing piece 3, which is a separate member from the outer shaft 1, may be attached to the through hole by interposing an elastic member as necessary. Further, the number of pressing pieces 3 is not limited to two as shown in the figure, but four pieces may be provided radially with respect to the axis as shown in FIG. 1 so that it can be retreated without any trouble. Reference numeral 5 denotes a central shaft to which a pen nib 6 having a capillary action made of synthetic fiber bundle, natural fiber bundle, urethane, sponge, etc. is attached to the tip using a fixing ring 7, etc., and the rear part of the central shaft 5 has the necessary parts. A liquid storage chamber 8 which is compressible and deformable when pressed by having a bellows shape and is elastically returnable is connected thereto. The liquid storage chamber 8 stores liquids such as writing ink and cosmetic ink. In the illustrated example, the central shaft 5 and the liquid storage chamber 8 are integrally formed by blow molding, and the annular body serving as the valve seat 9 is fixed to the inner surface of the central shaft 5. The central shaft 5 and liquid storage chamber 8 may be formed separately and connected and fixed during assembly, and the valve seat 9 may be located between the liquid storage chamber 8 and the nib 6. Various changes can be made. The center shaft 5 is disposed within the outer shaft 1 with the tip of the center shaft 5 protruding, and more specifically, the bottom of the liquid storage chamber 8 is brought into contact with the bottom of the outer shaft 1, and as shown in FIG. A flange 1 is formed on the outer surface of the inner shaft 5 within the anti-rotation groove 11 of the cylindrical body 10 fixed to the tip of the outer shaft 1.
2 (two in the figure), and is disposed within the outer shaft 1 with its forward movement restricted by the cylindrical body 10. In addition, the above-mentioned rotation preventing means is attached to the outer shaft 1.
This is to prevent the center shaft 5 from turning when a cap (not shown) is screwed onto the threaded portion of the center shaft 5 that protrudes further. This is not necessarily necessary when the outer shaft 1 is fixedly attached to the outer shaft 1. Reference numeral 13 denotes a tapered surface that slopes forward and is formed on the outer surface of the center shaft 5 at a position where it comes into operational contact with the inward protrusion 2 of the pressing piece 3, that is, in the state shown in FIG. The tapered surface 1 at the protrusion 2
By pressing 3, the center shaft 5 can be moved back. Reference numeral 14 denotes a valve body that is biased rearward by a spring 15 stretched between it and the center shaft 5, and is arranged so that the valve 16 in front of the valve 16 is pressed against the valve seat 9. A rod-shaped portion serving as a valve stem 17 is provided at the rear of the valve 16, and the rear end of the valve stem 17 is normally positioned with a slight gap from the bottom of the liquid storage chamber 8. 18 is the valve stem 17 of the valve body 14
This is a leg for resting the valve body 14 provided at the rear end.

If you hold the outer shaft 1 in the state shown in FIG. 1, press the pressing piece 3 inward with your fingertips, and press the tapered surface 13 of the central shaft 5 with the inward protrusion 2 of the pressing piece 3, the central shaft 5
The liquid storage chamber 8 is located along the slope of the tapered surface 13.
While compressing and deforming the bellows part, it retreats against its elasticity. When the center shaft 5 moves back slightly, the rear end of the valve stem 17 of the valve body 14, which moves back together with the center shaft 3, comes into contact with the bottom of the liquid storage chamber 8, and the valve body 14 is prevented from retreating. Therefore, if the center shaft 5 is further moved backward against the resiliency of the spring 15, the valve 16 of the valve body 14 is separated from the valve seat 9 of the center shaft 5, and the valve is opened. Center shaft 5 even after opening the valve
is able to retreat until the pressing piece 3 is pushed all the way, so that the liquid in the liquid storage chamber 8 can be supplied to the pen tip 6 under pressure. After supplying the liquid to the pen nib 6, when the pressure from the fingertip of the push piece 3 is released, the valve body 14 is moved by the elastic force of the spring 15, and the center shaft 5 and the liquid storage chamber 8 are moved to the first position by the elasticity of the bellows part. The state will return to the state shown in the figure.

As mentioned above, the amount of liquid supplied when pressing the pressing piece 3 inward is determined by the amount of retreat of the center shaft 5, that is, the pressing stroke of the pressing piece 3 and the taper angle of the tapered surface 13 of the central shaft 3, but it is slightly If you want to move the center shaft 5 back in the same way as above with a certain amount of pressure, or if you want to move the center shaft 5 back with
If the resiliency of the spring 15 is set to be strong in order to securely seal the valve seat 9 to the valve seat 9, the pressing operation of the pressing piece 3 tends to become heavy, so in such a case, as shown in FIG. A ball 19 is rotatably or fixedly disposed on the inward protrusion 2 of the pressing piece 3 to reduce the frictional resistance between the ball 19 and the tapered surface 13, or as shown in FIG. The position of the inward protrusion 2 provided on the piece 3 is
The position is rearward than that shown in the figure, and by utilizing a lever action, a pressing force greater than the force pressing the pressing piece 3 inward is generated on the inward protruding part 2,
In addition, as shown in FIGS. 8 and 9, a tapered surface 13a is provided on the inner surface of the pressing piece 3, and the tapered surface 13a presses the protrusion 2a provided on the center shaft 5. It is preferable to reduce the pressing force of the pressing piece 3. In short, a tapered surface portion is appropriately provided on at least one of the pressing piece and the center shaft having a liquid storage chamber to which an elastic return force is applied by appropriate means, and the pressing piece and the central shaft are appropriately brought into contact with this tapered surface portion. Just take it as a thing.

(Effects) The applicator with a valve of the present invention has a pen tip at the tip, a liquid storage chamber connected to the rear that has an elastic return force in the front and back direction that can be deformed by pressure, and a central shaft with a valve seat inside. A spring is placed between the valve body and the center shaft to bias the valve body backward with respect to the center shaft, so that the valve is attached to the valve seat. and the rear end of the valve body is arranged so as to have a slight gap with the bottom of the liquid storage chamber. A tapered surface is provided on at least one of the pressing piece or the center shaft so that the pen tip protrudes, and the pressing piece and the center shaft are arranged so as to come into contact with each other at this tapered surface portion. Therefore, when the pressing piece is pressed inward, the position of contact between the pressing piece and the center shaft on the tapered surface changes against the elastic return force of the liquid storage chamber, and the valve seat is moved relative to the valve seat. Since the valve is moved backward relative to the valve to open the valve, when supplying the liquid in the liquid storage chamber to the pen tip during use,
The desired liquid can be reliably supplied to the pen tip with the simple operation of pressing the pressure piece inward with your fingertip while in use, without having to interrupt use and change the barrel as in the past. Therefore, it is possible to provide a valve-equipped applicator that is practical and has excellent operability.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal sectional view, FIG. 2 is a sectional view taken along line A-A in FIG. 1, FIG. 3 is an external view of FIG. 1, and FIG. A sectional view showing a modified example of the pressing piece in Fig. 2, and Fig. 5 taken along the line BB in Fig. 1.
6 to 8 are longitudinal sectional views of main parts showing modified examples, and FIG. 9 is a sectional view taken along the line CC in FIG. 8. 1... Outer shaft, 3... Pressing piece, 5... Center shaft, 6...
...Pen tip, 8...Liquid storage chamber, 9...Valve seat, 14
... Valve body, 15 ... Spring, 16 ... Valve.

Claims (1)

[Scope of utility model registration request] A valve 16 is provided in the center shaft 5, which has a pen nib 6 at the tip, a liquid storage chamber 8 which has an elastic return force in the front and rear direction that can be deformed by pressure, and a valve seat 9 inside.
The valve 16 is configured by tensioning a spring 15 between the valve body 14 and the center shaft 5 to urge the valve body 14 rearwardly with respect to the center shaft 5. so as to come into pressure contact with the valve seat 9, and
The rear end of the valve body 14 is arranged with a slight gap from the bottom of the liquid storage chamber 8, and the inner shaft 5 is inserted into the outer shaft 1, which has a pressing piece 3 on the side wall. A tapered surface is provided on at least one of the pressing piece 3 and the center shaft 5 so that the pen tip 6 protrudes, and the pressing piece 3 and the center shaft 5 are arranged so as to abut on this tapered surface portion, As a result, when the pressing piece 3 is pressed inward, the contact position between the pressing piece 3 and the center shaft 5 on the tapered surface changes against the elastic restoring force of the liquid storage chamber 8; An applicator with a valve, in which the valve seat 9 moves relatively backward with respect to the valve 16 to open the valve.