JPH0441982Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention advances a piston that is slidably arranged in a fluid storage chamber in a shaft cylinder, and the piston moves the fluid stored in the fluid storage chamber into the shaft. The present invention relates to an applicator that can be supplied to an applicator at the tip of a cylinder.

(Prior art and its problems) As an applicator related to the above,
As disclosed in the above publication, by rotating the front shaft and the rotatable rear shaft, a threaded rod that rotates at the same time as the rear shaft and is slidable is advanced along the screw hole of the front shaft. It is known that a piston at the tip of the screw rod presses fluid stored in the front shaft and supplies it to the pen tip at the tip of the front shaft.

However, although the structure described above has the advantage that even if the stored fluid is a highly viscous liquid, the fluid can be pressed by the piston and reliably supplied to the pen tip, it is difficult to supply the fluid to the pen tip during use. , the rear shaft must be rotated relative to the front shaft,
In addition to having to change the grip of the shaft cylinder each time and operating it with both hands, it is troublesome to adjust the amount of fluid supplied by rotating the rear shaft.

(Purpose of the invention) The present invention was devised in view of the above-mentioned problems, and the piston, which is slidably arranged in the fluid storage chamber in the barrel, can be moved by simply pressing the operation knob provided on the barrel with a fingertip. It is an object of the present invention to provide an applicator with excellent operability, which can be moved forward with a simple operation and can supply fluid stored in a fluid storage chamber with the piston to an applicator at the tip of a barrel.

(Structure of the invention) The present invention provides an applicator at the tip of the barrel, a piston that is slidably provided in a fluid storage chamber in the barrel that communicates with the applicator, and a screw rod that can move forward by pressing the piston. is screwed into a screw hole of an annular body that is fixedly arranged at a predetermined position in the shaft cylinder, and a ratchet wheel having a plurality of pawls that is disposed rearward from the annular body and whose movement toward the application section is restricted is attached. The engagement piece of the operating knob, which is fitted into the threaded rod so as to be slidable and rotated together and arranged on the shaft cylinder, is engaged with the pawl of the ratchet wheel, and when the operating knob is pressed down, The gist of this applicator is to rotate a ratchet wheel, and use the rotating ratchet wheel to advance a screw rod that is screwed into a screw hole so that a piston at the front can supply stored liquid to an applicator.

(Description of Embodiments) Hereinafter, embodiments of the present invention will be described based on the drawings. In FIGS. 1 to 4, reference numeral 1 denotes an applicator provided at the tip of the barrel 2, and in the drawings, a fluid storage chamber 5 containing a pen tip 3 made of an elastic porous material, a fiber convergence material, etc. will be described later. Although the application part 1 is exemplified as a part that is fitted and fixed to the pipe part 4 that communicates with the pipe part 4,
The application section 1 can be modified in various ways depending on the type of fluid used, such as having only the pipe section 4 or having an opening at the tip of the shaft tube 2. Reference numeral 5 denotes a fluid storage chamber provided in the barrel 2, and fluids and powders for cosmetics, writing, etc. are stored in the fluid storage chamber 5. A piston 6 is slidably provided in the fluid storage chamber 5. Reference numeral 7 denotes a screw rod capable of pushing the piston 6 forward, and the screw rod 7 has threads on its outer surface and a notch 8 in the longitudinal direction giving it an irregular cross-section. Reference numeral 9 denotes an annular body fixed at a predetermined position within the shaft cylinder 2, and the threaded rod 7 is screwed into a screw hole 10 provided in the center of the annular body 9. 1
Reference numeral 1 denotes a ratchet wheel disposed behind the screw hole 10, restricted from moving in the direction of the application section 1, and fitted to the screw rod 7 so as to be slidable and rotatable together with the screw rod 7. That is, by rotating the ratchet wheel 11, the screw rod 7 to be screwed into the screw hole 10 can be advanced in accordance with the rotation of the ratchet wheel 11. 12 is a hole 13 on the side surface of the shaft cylinder 2
The pressing part 14 is exposed more, and the rear end part 15 is
is an operating knob that is fixed to the rear end of the shaft cylinder 2 and can be pressed down with a fingertip and returned elastically. It has a joining piece 17. 18 is a screw rod receiver having an arcuate cross section formed in the annular body 9 through a space for disposing the ratchet wheel 11;
is a ratchet wheel 11 that elastically engages with the pawl 16 of the ratchet wheel 11;
This is an elastic piece to prevent reverse rotation.

(Function) The fluid supply operation of the above-mentioned embodiment will be described below with reference to FIG. Pressing part 14 of operation knob 12
When pressed down with a fingertip, the engagement piece 17 of the operation knob 12 that engages with the pawl 16 of the ratchet wheel 11 can follow the pawl 16 and give rotation to the ratchet wheel 11 even though it deforms outward. , the screw hole 10 is opened by the rotation of the ratchet wheel 11.
By advancing the screw rod 7 that is screwed into the housing, the piston 6 at the front can pressurize the stored fluid and supply it to the application section 1. If the pressing of the pressing part 14 is released here, the operation knob 12 and the engagement piece 17 will return by their own elasticity, and the engagement piece 17 can be brought into the engagement position with the next claw 16. By further pressing down the pressing part 14, the ratchet wheel 11 is rotated, and the moving piston 6 can continuously supply fluid to the application part 1.

In the above-mentioned fluid supply operation, when the engagement piece 17 returns to the desired position, the ratchet wheel 11 may be taken with it, so in such a case, the elastic piece for preventing the ratchet wheel 11 from reversing is 19 is preferably elastically engaged with the pawl 16. Furthermore, if the downward stroke of the pressing portion 14 of the operating knob 12 is restricted by the inner surface of the shaft cylinder 2 or a part of the annular body 9, damage to the threads due to direct contact of the operating knob 12 with the threaded rod 7 can be avoided. can be prevented.

In the above-mentioned embodiment, the operation knob 12 and the engaging piece 17 are shown as being able to return to their original positions with their own elasticity, but it is also possible to use other elastic elements such as springs to give them return elasticity. You can also do this.

(Effects of the invention) As described above, according to the invention, by pressing down the operating knob provided on the shaft cylinder, the engaging piece of the operating knob rotates freely and integrally with the screw rod. The ratchet wheel is rotated by an amount corresponding to one pawl, and the rotating ratchet wheel advances the screw rod that is screwed into the screw hole, and the front piston can supply the stored fluid to the application section. It is possible to provide an applicator that can be extremely easily and reliably supplied to the applicator section and exhibits excellent operability.

It should be noted that the present invention is not limited to the illustrated embodiment; for example, the number of pawls of the ratchet wheel, the shape of the operating knob, etc. can be changed in various ways without departing from the spirit of the invention.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal sectional view, FIG. 2 is an enlarged perspective view showing the annular body and ratchet wheel in FIG. 1, and FIG. 4 is an enlarged perspective view of the operating knob in FIG. 1, and FIG. 5 is a sectional view taken along line A--A in FIG. 1. DESCRIPTION OF SYMBOLS 1... Application part, 2... Shaft cylinder, 5... Fluid storage chamber, 6... Piston, 7... Screw rod, 9... Annular body, 10... Threaded hole, 11... Ratchet wheel, 12... ...Operation knob, 15...Rear end, 16...Claw.

Claims (1)

[Scope of utility model registration request] An applicator 1 is provided at the tip of the barrel 2, a piston 6 is slidably provided in a fluid storage chamber 5 in the barrel 2 that communicates with the applicator 1, and a screw rod 7 is provided that can push the piston 6 forward. A plurality of claws 17 are screwed into screw holes 10 of an annular body 9 which is fixedly arranged at a predetermined position in the shaft cylinder 2, and which are disposed rearward from the annular body 9 and whose movement in the direction of the application section 1 is restricted. The ratchet wheel 11 having the above-mentioned ratchet wheel 11 is fitted into the threaded rod 7 so as to be slidable and rotatable together, and the engagement piece 17 of the operation knob 14 disposed on the shaft cylinder 2 is fitted into the pawl 16 of the ratchet wheel 11. becomes engaged with,
By pressing down the operating knob 14, the ratchet wheel 11 is rotated, and the rotating ratchet wheel 11 advances the screw rod 7 that is screwed into the screw hole 10, so that the stored liquid can be supplied to the application section 1 by the piston 6 at the front. applicator.