JPS6321011A - Writing utensil for viscous liquid - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a writing instrument for viscous liquids used primarily for liquid cosmetics such as liquid lipsticks, eyeliners, and foundations.

Conventional technology A nib part is provided at the tip of the shank, a nozzle that can move forward and backward is built into this nib, a writing liquid tank is provided in the shank in communication with this nozzle, and a piston that pushes writing liquid into this tank is installed. A push button is provided at the rear end of the brush, and when this push button is pressed, the nozzle advances near the tip of the brush tip, and then the piston moves to supply vinegar liquid from the nozzle to the brush tip, and then the push button is released. A writing instrument for viscous liquids with a retracting nozzle has already been devised (Japanese Patent Application No. 61-13).
No. 276).

This writing instrument is easy to use because writing fluid is directly supplied near the tip of the crown by the operation of the nozzle and piston.

Problems to be Solved by the Invention When the above-mentioned writing implement is used for liquid lipstick, etc., since the amount of writing fluid used each time is small, it is necessary to make the stroke of each movement of the piston extremely small. .

In this writing instrument, a single push button operation drives the nozzle with a relatively large stroke and then drives the piston, so it is difficult to minimize the stroke of the piston.

Therefore, the present invention was devised for the purpose of solving this difficulty and obtaining a structure that can easily realize one movement stroke of the piston so that the above-mentioned writing instrument can be used even with two liquid lipsticks, etc. It is something.

A means for solving the problem, that is, the present invention, is to screw an intermediate rotary body to the push button with a large lead helical wire, and provide this intermediate rotary body with a ratchet mechanism that allows rotation only in one direction. This is a medium for viscous liquid, characterized in that a piston is screwed into the body by a helical wire of a small lead, making it possible to extrude a small amount of writing liquid.

Therefore, in this writing instrument, the linear movement of the push button is first converted into the rotational movement of the intermediate rotating body so that the amount of rotation per stroke is reduced, and then this rotational movement is again converted into the linear movement of the piston, resulting in a reduction in the rotational stroke. Because of this conversion, the piston's movement stroke of 1 degree becomes extremely small. In addition, a ratchet mechanism that prevents the piston from returning even if the push button returns is installed on the intermediate rotating body, which has a larger operating displacement than the piston itself, so that no problems will occur even if the piston stroke is minimized. [There is.

EXAMPLES Below, examples illustrating the present invention will be specifically described.

In this viscous liquid lighting device 10, a brush tip portion 12 is provided at the tip of a shaft portion 11, and this brush tip portion 12 is covered with a detachable cap 13. A spring 14 pushing backward is provided at the rear of the brush tip 12, and this spring 14 inside the shaft 11
An uneven surface 15 facing rearward is provided around the periphery.

A rear lid 16 is screwed onto the rear end of the shaft portion 11.
A push button 17 protrudes from the rear end.

This push button 17 is connected to a straight concave groove 1 on the inner peripheral surface of the rear cover 16.
8, it can move linearly but cannot rotate. A drive shaft 19 is fitted into the push button 17 so as to be able to move linearly and rotatably, and is pushed forward from the push button 17 by a spring 20. A spiral groove 21 with a large lead right-handed spiral is formed around the drive shaft 19, and an intermediate rotating body 22 is held here so as to be rotatable with respect to the push button 17 but not to be movable directly. are screwed together. A ratchet gear 23 is formed on the outer periphery of this intermediate rotating body 22,
A ratchet mechanism 25 is formed which engages with a spring piece 24 fixed to the push button 17 and allows the intermediate rotating body 22 to rotate only to the left when viewed from the rear. Furthermore, the tip of the drive shaft 19 forms a hexagonal coupling portion 26 .

A refill 27 is fitted and stored inside the shaft portion 11 . This refill 27 consists of a cylindrical tank 29 containing a writing fluid 28, and a nozzle 30 is provided in communication with the tank 29 at the tip C. located within. Further, a protrusion 31 is formed on the front peripheral edge of the tank 29, and an uneven surface 15
By engaging with the refill 27, the refill 27 can be made unrotatable with respect to the shaft portion 11.

A rotation shaft 32 is rotatably fitted into the tank 29 from the rear, and a coupling portion 26 of the drive shaft 19 is inserted into a hexagonal hole 33 at the rear end.
can be fitted and rotated □. Around the rotation shaft 32 is a spiral thread 3 extending in the form of a small right-handed spiral winding wire.
4 is formed, into which a piston 36 made of synthetic resin and rubber is screwed, which is fitted with a straight protruding strip 35 on the inner surface of the tank 29 and is non-rotatable but capable of linear movement.

Since this writing instrument 10 has the above configuration, it operates as follows.

When the refill 27 is attached, the state shown in FIG.
9 is fitted, and the push button 17 is connected to the spring 2.
It protrudes backwards like 0.

In order to supply writing liquid to the brush tip 12, push button 1 is pressed.
When 7 is pressed, the state shown in FIG. 1B is first entered. In other words, the rotation shaft 32 and the drive shaft 19 do not rotate due to the frictional force of the piston 36, and the entire refill 27 moves forward together with the push button 17 while compressing the spring 14, so that the tip of the nozzle 30 moves forward with the tip of the brush tip 12. Proceed to near the tip. At this time, cut fill 2
The protrusion 31 of 7 engages with the uneven surface 15, and the refill 27 becomes unable to rotate relative to the shaft portion 11.

When the 1st nipple button 17 is further pressed, the state shown in FIG. 1C is obtained. That is, the push button 7 moves forward while compressing the push button 20, and moves the intermediate rotating body 22 forward. Drive shaft 19 to be screwed together
Rotate to the left. Therefore, the rotating shaft 32 of the refill 27 is also rotated to the left via the coupling portion 26, and the piston 36, which is screwed together via the spiral thread 34, is advanced to push out the writing liquid 28 to the tip portion 12.

Since the lead of this spiral thread 34 is small, the piston 36
The moving stroke is small.

Next, when the push button 17 is released, the entire refill 27 is moved back to its original position together with the nozzle 30 by the spring 14.
The push button 17 is also returned to its original position by the spring 20. At this time, the intermediate rotating body 22.

Although it moves backward relative to the drive shaft 19, it is allowed to rotate to the left when viewed from the rear (by the ratchet mechanism 25), so
The intermediate rotating body 2 is rotated without rotating the drive shaft 19 due to frictional force.
Only the piston 36 remains in the position it was in when it pushed out the writing fluid.

In addition, when installing and removing the refill 27, move the rear cover 6 to the shaft 1.
When the rear lid 16 is rotated at this time, the entire refill 27 rotates together with the rear lid 16.

Effects of the Invention In the writing instrument for viscous liquids of the present invention, as described above, the linear movement of the push button is first converted into the rotational movement of the intermediate rotating body, and then converted again into the linear movement of the piston, and these movement conversions are The piston movement stroke is made smaller by using different helical wire leads.

It is possible to achieve extremely small piston strokes. Furthermore, since the helical wire can be processed easily and with high precision, this writing instrument can be manufactured easily and with high precision and high reliability. In addition, since the ratchet mechanism is installed on the intermediate rotating body with a large gJ displacement,
High precision can be easily achieved.

Therefore, according to the present invention, it is possible to use a type of writing instrument that extrudes writing liquid from a movable nozzle for viscous liquids such as liquid lipstick that are used in an extremely small amount per time.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention. Figures A, B, and C are all side half-sectional views, where ph is normal, B is when the push button is pushed halfway, and C is when the push button is pushed in. Fig. 2 is a sectional view taken along the line 1 in Fig. 1, Fig. 3 is a sectional view taken along the line 1-1 in the same figure, and Fig. 4 is a sectional view taken along the line IV-IV in the same figure. Sectional view, FIG. 5 is a side half-sectional view of the beam fill. 10... Writing instrument for viscous liquid, 11... Shaft part, ]2... Brush tip part, 17...
Push button, 21...Spiral groove, 22
......Intermediate rotating body, 23...Ratchet gear, 24...Spring piece, 25...
Ratchet mechanism, 28...Writing fluid, 29...
...Tank, 3o...Nozzle, 34...
...Spiral, 36...Piston.

Claims (1)

[Scope of Claims] 1. A brush tip is provided at the tip of the shaft, a nozzle that can move forward and backward is built into the brush tip, a writing liquid tank is provided in the shaft in communication with the nozzle, and the writing liquid is poured into the tank. A pushing piston is provided, and a push button is provided at the rear end of the shaft, and when the push button is pressed, a nozzle advances near the tip of the brush tip, and then the piston moves to supply writing liquid from the nozzle to the brush tip, In a writing instrument for viscous liquids in which the nozzle retreats when the push button is released, an intermediate rotating body is screwed onto the push button using a large lead helical wire, and this intermediate rotating body is provided with a ratchet mechanism that allows rotation in only one direction. A writing instrument for viscous liquid, characterized in that a piston is screwed onto the intermediate rotating body by a helical wire with a small lead, thereby making it possible to extrude a small amount of writing liquid.