JPH0725257Y2 - Fluid ejector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) A valve seat, a valve body biased rearwardly to this valve seat, and an attachment to the valve body when a forward pressing force is applied. A pressing body disposed behind the valve body so as to move forward against the force and open the valve, and the pressing force is applied to the pressing body via a fluid tank detachably attached to the pressing body. The present invention relates to a fluid ejector in which a pressing body is arranged inside a shaft so as to be indirectly added. Here, as the fluid, ink liquid, writing liquid such as ink, ink, cosmetic liquid such as eyeliner and lip color, liquid such as seasoning, machine oil and cleaning liquid, or
A powder or the like can be used as an example.

(Prior Art) It is considered that Japanese Utility Model Publication No. Sho 63-19171 discloses an example of a fluid ejector of the type described above. The description of the scope of claims for utility model registration in this publication states: "In a writing instrument of the type in which the valve body is actuated by pressing the knock rod to supply the ink in the ink storage portion in the pen body direction, -Shaped member is inserted and attached, a valve seat is formed in a front opening of the member, and a valve element is press-fitted to the valve seat from the front by a spring material, and the through hole of the member has the above-mentioned structure. The leg portion of the valve element is loosely inserted and is in contact with the front end of the ink cartridge member loosely inserted in the rear shaft cylinder, and the elastic cylindrical member is hermetically sealed between the cylindrical member and the ink cartridge member. A small space for expansion and contraction of the elastic cylindrical member for inserting and connecting both members and for allowing the ink cartridge member to move forward and backward by operating a knock rod at the tail end of the shaft cylinder and the ink cartridge. Writing instrument provided between the members. " That. In addition, in the description of the detailed description of the invention, "the ink cartridge member 7 is effective even if a convex-shaped separate diameter reducing member is attached to the front portion of the main body." Column number
(20th to 23rd lines), "The main body of the ink cartridge is detachably attached to the convex diameter reducing member, and the writing life can be further extended by replacing the main body." The third column, second line to the same fifth line). Here, "convex diameter reducing member""main body of ink cartridge"
Are considered to correspond to the "pressing body" and the "fluid tank" used in the above description.

(Problems to be solved by the invention) When the fluid tank is attached to or detached from the pressing body, a rotational force is often applied. It may be easy to understand if you imagine how to attach and detach the cartridge of a fountain pen, but "twist"
Many users find it easier to operate by inserting or pulling it out while applying force.

It is unlikely that this rotational force will cause any problems in the case of a normal fountain pen.

However, in the valve structure as described above, applying a rotational force to the fluid tank may cause unnecessary fluid leakage.

This will be described in line with that of the above publication.

When the "main body of the ink cartridge" is attached to or detached from the "convex diameter reducing member", if a rotational force is applied to the "main body of the ink cartridge", the rotational force is transmitted to the "convex diameter reducing member". As a result, the "convex diameter reducing member" tries to rotate, but the "elastic cylindrical member" is inserted into the "convex diameter reducing member", and the "elastic cylindrical member" is , The "cylindrical member" mounted in the "shaft cylinder neck" is also inserted, and therefore the rotational force of the "convex cylindrical member" is generated as a twist of the "elastic cylindrical member". Indeed, an "elastic tubular member" will, as the name implies, exert elasticity. Therefore, such a twist may not cause breakage. However, the twisting force imposes an excessive force on the mounting portion with the “elastic cylindrical member” or the mounting portion with the “cylindrical member”. As a result, even if the provisional "elastic cylindrical member" is not broken, ink often leaks from these insertion portions.

(Means for Solving the Problem) The present invention is directed to a valve seat, a valve body biased rearwardly with respect to the valve seat, and a biasing force applied to the valve body when a forward pressing force is applied. And a pressing body arranged behind the valve body so as to move forward and open the valve against the pressing body, and the pressing force is indirectly applied to the pressing body via a fluid tank that is detachably attached to the pressing body. A fluid discharger in which a pressing body is arranged inside the shaft body so that the pressing body is provided with an outward projecting portion on the outer wall of the pressing body, and a concave portion is formed on the inner wall of the shaft body. The gist of the present invention is a fluid ejector in which the protrusion is positioned to regulate the rotation of the pressing body.

(Example) An example is shown in the accompanying drawings. First, in FIG. 1, reference numeral 1 is a brush tip, the rear end of which has a brim shape, and is prevented from falling off by the tubular body 2. The tubular body 2 has a front shaft 3
It is attached by press fitting etc. to the inside of the tip shaft 3 and the pipe body 4 extending into the brush ear 1 is attached and
A stopper 5 that supports the rear end is locked. The rear wall of the stopper 5 serves as a support portion for the elastic member 6 such as a coil spring. The rear end of the elastic member 6 is locked to the valve body 7, whereby the valve body 7 biased rearward abuts the valve seat 8 and closes the valve. That is, the front shaft 3 serves as a valve seat member in this example. Further, a tip end portion of a bellows member 9 which expands and contracts elastically and elastically is attached to the tip shaft 3 by press fitting or the like. The rear end of the bellows member 9 is attached to the pressing body 10 having a through hole by press fitting or the like. Here, the pressing body from the above brush head 1
The members up to 10 are preassembled before being assembled in the state shown in the figure. (This assembly is hereinafter referred to as a coating destination set.) The coating destination set is inserted from the front of the front shaft 11 and
Thus, the tip shaft 3 of the application destination set is projected and fixed, and the tip end portion of the bellows member 9 is sandwiched between the tip shaft 3 and the tip shaft 3. Further, the center shaft 12 is attached to the rear end of the front shaft 11 by press fitting, etc.
The pressing body 10 is in contact with the center shaft 12, and the bellows member 9 is in a state of being slightly contracted from the free length. (Hereinafter, the assembly of the members from the brush head 1 to the center shaft 12 is referred to as a front shaft set.) Reference numeral 13 indicates a fluid tank, and this fluid tank 13 is
It is detachably attached to the rear part of the pressing body 10. The illustrated fluid tank 13 accommodates balls 14 inside. The balls 14 are used for agitating the fluid in the fluid tank 13, that is, this example is an example in which a liquid such as cosmetic liquid is contained in the fluid tank 13 as a fluid.

Reference numeral 15 indicates a connecting shaft, which is attached to the front end portion of the rear shaft 16 by press fitting or the like, and the rear end wall thereof serves as a support portion for an elastic member 17 such as a coil spring. Repellent member 17
Urges the knock body 18 rearward, and the knock body 18 is prevented from falling off by engagement with the rear end reduced diameter portion of the rear shaft 16, and from the notched portion at the rear end of the rear shaft 16. A part of the rear end is exposed. (The assembly of the members from the connecting shaft 15 to the knock body 18 is hereinafter referred to as a rear shaft set.) Reference numeral 19 is an outer cap 19a and an inner cap 1.
It is a cap consisting of 9b.

The front axle set and the rear axle set are detachably attached. This attachment may be performed by press fitting or the like, but in this example, a threaded portion is formed between the front shaft 11 and the connecting shaft 15.

Therefore, when using this example, the front shaft set and the rear shaft set are unscrewed, the fluid tank 13 is attached to the pressing body 10, and the front shaft set and the rear shaft set are screwed together. The state shown in FIG. Then, when a pressing force is applied to the knock body 18, the knock body 18 contacts the rear end of the fluid tank 13, and the fluid tank 13 and the pressing body 10 start to move forward,
10 contacts the valve body 7, the valve body 7 advances, and fluid is discharged.

Here, when the fluid tank 13 is attached to the pressing body 10, rotation is restricted, and forward and backward movement of the pressing body 10 is also restricted. Although this is shown in FIG. 2, as described above, the coating destination set in the front shaft set is inserted from the front of the front shaft 11. Since these relationships are satisfied by the pressing body 10, the front shaft 11, and the center shaft 12, they will be described with reference to FIGS. 3 to 9. First, as shown in FIGS. 3 and 4, the pressing body 10 is formed with an appropriate number (four in the drawing) of protrusions 10a. Further, as shown in FIGS. 5 to 7, the front shaft 11 has a small diameter portion 11b as an inner hole 11a in the middle portion and a large diameter portion 11c in the rear portion. An appropriate number (four in the figure) of recessed passages 11d in the longitudinal direction reaching the large diameter portion 11c are formed. This recessed path 11d is a portion that serves as a passage for the protrusion 10a of the pressing body 10.
Although the bottom of the recess 11d forms a step with the large-diameter portion 11c, this is appropriate, and the step may not be generated. The small diameter portion 11b of the inner hole 11a is provided with a recessed portion 11e along the recessed path 11d because this is because the front shaft 11 of this example is a synthetic resin injection molded product. In order to make the resin flow at the time of molding preferable, it is considered to make the wall thickness of the molded product as uniform as possible. Therefore, the small diameter portion 11b of the inner hole 11a
At the boundary between the large diameter portion 11c and the large diameter portion 11c, a stepped portion 11f is formed except for the concave passage 11d. In addition, the large diameter portion 11c of the inner hole 11a has this step portion.
A ridge 11g is formed so as to project rearward from 11f. That is, the projection 10 of the pressing body 10 is assembled after being assembled into the application destination set.
The a passes through the inner hole 11a of the front shaft 11 from the front through the concave path 11d of the small diameter portion 11b and reaches the large diameter portion 11c, and then the coating destination set is rotated (in this example, the front shaft 11 is rotated). When viewed from the front of
When the coating set is rotated clockwise with respect to the front shaft 11), the protrusion 10a of the pressing body 10 is prevented from rotating at the position where it abuts the ridge 11g formed on the large diameter portion 11c. , By detecting this abutment (the front shaft 11 is not always transparent, so the touch is often relied upon), it is possible to confirm that the protrusion 10a of the pressing body 10 is arranged at a predetermined position. Check and fix the application set to the front shaft 11. As a result, the protrusion 10a of the pressing body 10 has the small diameter portion 11 of the inner hole 11a of the front shaft 11.
It is located behind the stepped portion 11f between b and the large diameter portion 11c. Further, if the center shaft 12 is attached, the assembling of the front shaft set is completed. As shown in FIGS. 8 and 9,
The center shaft 12 has a protruding portion 12a at the tip and a deformed portion 12b outside the rear end. The deformed portion 12b is a cutout portion 1 provided at the rear end of the front shaft 11.
Mate to 1h. That is, the center shaft 12 is attached to the front shaft 11 in a predetermined positional relationship. By this attachment, the protrusion 12a of the center shaft 12 is located at the large diameter portion 11c of the inner hole 11a of the front shaft 11, and the protrusion 10a of the pressing body 10 together with the ridge 11g of the front shaft 11 is positioned.
Located on both sides of. Further, the protruding base portion 12c of the protruding portion 12a of the center shaft 12 causes the protrusion 10a of the pressing body 10 to be slightly displaced forward when the center shaft 12 is inserted into the front shaft 11. In this way, the projection 10a of the pressing body 10 is set as the front shaft, and thereafter, the protrusions 11g and the protrusions 12a that regulate rotation on both sides, the stepped portion 11f that regulates the forward movement of the front, and the protrusion that regulates the backward movement of the rear. It will be surrounded by the base 12c. The protrusion 10a is the "outer protrusion" in this example, and the "recess" in this example is formed by the protrusion 11g, the protrusion 12a, the step 11f, and the protrusion base 12c.
Is.

As described above, in this example, not only the rotation restriction of the pressing body,
This is an example of one that also regulates forward / backward movements and that also considers the efficiency of assembly. In addition, other points are taken into consideration in the present example, and will be described below.

When the fluid tank 13 is attached to the pressing body 10, the pressing body 10 advances until it comes into contact with the step portion 11f of the front shaft 11. In this state, the fluid tank 13 further advances with respect to the pressing body 10. At this time, if the force for pressing the fluid tank 13 is continuously applied to the pressing body 10 as it is, the pressing body 10 may be damaged. Therefore, in this example, the forward movement of the fluid tank 13 is stopped at the rear end wall of the center shaft 12. This is the reason why the front end of the fluid tank 13 is shown not to contact the pressing body 10 in FIG.

Further, the valve body 7 is formed of two parts. Although the illustration is simplified, even if the pressing body 10 abuts on the valve body 7, the through hole of the pressing body 10 and the inside of the bellows member 19 communicate with each other even when the pressing body 10 comes into contact with the valve body 7 by making the rear portion have an irregular cross section. I try to be something. When the contact between the valve body 7 and the pressing body 10 closes the through hole of the pressing body 10, the volume change of the space in front of the pressing body 10 positively pressurizes the fluid and introduces air. Depending on the type of fluid, this may or may not be preferable. This example is an example in which such pressurization is prevented as much as possible.

Although the above description has been given of an example that seems to be preferable, other modifications can be made as appropriate without departing from the spirit of the invention. For example, the pressing body 10
If the protrusion 10a of the front shaft is self-expanding, the front shaft 11
Even if the concave passage 11d is not positively formed in the inner hole 11a of the
The application destination set can be inserted and attached from the front of the front shaft 11 and the forward movement can be regulated. Further, the bellows member 9 may be replaced by another container body, for example, a piston-cylinder relationship. If there is a relationship between the piston and the cylinder, no matter how much rotational force is applied to the pressing body, it does not cause damage, so it does not matter? You might also say that. However, the relative rotation of the piston and cylinder often causes liquid leakage and the like. Therefore, even in the case of a piston-cylinder relationship, it is still desirable to regulate the rotation. If the self-elasticity cannot be sufficiently expected like the bellows member 9, another elastic member may be used as appropriate. Also, the fluid tank 13 may be appropriate. For example, the ball 14 may be used as a plug. Of course,
It may not have the ball 14. In addition, in the illustrated example, a shaft member is formed of a plurality of members such as the front shaft 11 and the rear shaft 16. However, if it is not necessary to separate the front shaft and the rear shaft for mounting the fluid tank, such as when the fluid tank is made to project as it is at the rear end without using the knock body 18, it is an integral body. There is no bearing. That is, as is the case with the valve element 7, appropriate parts can be integrated as appropriate, and conversely can be made into multiple parts. The integration of the bellows member 9 and the pressing body 10 is also an example. Further, an example of an applicator having a brush tip is shown,
It can be a writing instrument equipped with a felt nib, which is generally called a resin nib obtained by extrusion molding synthetic resin, or one that has only an open end like a general oil bottle for machines. You can also do

(Effect of the Invention) The valve seat, the valve body biased rearwardly with respect to the valve seat, and the forward movement against the biasing force applied to the valve body when a forward pressing force is applied. A pressing body disposed behind the valve body so as to open the valve, and the pressing body is configured so that the pressing force is indirectly applied to the pressing body via a fluid tank detachably attached to the pressing body. A fluid ejector in which a shaft is disposed inside a shaft body, wherein an outer protruding portion is provided on an outer wall of the pressing body, and a concave portion is formed on an inner wall of the shaft body. Since the fluid discharge tool is formed by restricting the rotation of the body, it is not necessary to apply an unreasonable force when mounting the fluid tank, and therefore fluid leakage can be prevented as much as possible.

[Brief description of drawings]

1 is a partially cutaway vertical sectional view showing an example of the present invention, FIG. 2 is a horizontal sectional view taken along the line I-I of FIG. 1, and FIG. 3 is a partially cutaway vertical sectional view showing an example of the shape of a pressing body. Fig. 4, Fig. 4 is a transverse sectional view taken along the line II-II in Fig. 3, Fig. 5 is a longitudinal sectional view showing an example of the shape of the front shaft, and Fig. 6 is a transverse sectional view taken along the line III-III in Fig. 5, FIG. 7 shows I in FIG.
Fig. 8 is a lateral cross-sectional view taken along line V-IV, Fig. 8 is a partially cutaway vertical cross-sectional view showing one example of the shape of the center shaft, and Fig. 9 is a lateral cross-sectional view taken along line V-V in Fig. 8. 1 ... Brush tip, 2 ... Tubular body, 3 ... Tip shaft, 4 ... Pipe body, 5 ... Stopper, 6 ... Repulsion member, 7 ... Valve body,
8 ... Valve seat, 9 ... Bellows member, 10 ... Pressing body, 10a
...... Protrusion, 11 …… Front shaft, 11a …… Inner hole, 11b …… Small diameter part,
11c …… Large diameter part, 11d …… Recessed path, 11e …… Recessed part, 11f ……
Step, 11g ... Ridge, 11h ... Notch, 12 ... Center shaft, 12
a: protruding part, 12b: deformed part, 13: fluid tank, 14 ...
… Ball, 15 …… Connecting shaft, 16 …… Rear shaft, 17 …… Repellent member, 18 …… Knock body, 19 …… Cap, 19a …… Outer cap, 19b …… Inner cap.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B65D 83/00

Claims (1)

[Scope of utility model registration request] 1. A valve seat, a valve element biased rearwardly with respect to the valve seat, and a forward movement against a biasing force applied to the valve element when a forward pressing force is applied. A pressing body disposed behind the valve body so as to open the valve, and the pressing body is configured so that the pressing force is indirectly applied to the pressing body via a fluid tank detachably attached to the pressing body. A fluid ejector in which a shaft is disposed inside a shaft body, wherein an outer protruding portion is provided on an outer wall of the pressing body, and a concave portion is formed on an inner wall of the shaft body. A fluid ejector that regulates body rotation.