JPH0444219Y2 - - 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 supplies the applicator to the applicator at the tip of the cylinder.

(Prior art and its problems) The applicator related to the above has a front shaft and a freely rotatable rear shaft that rotates, and a threaded rod that rotates at the same time as the rear shaft and is slidable is connected to the screw of the front shaft. It is known that the pen is moved forward along the hole, and a piston at the tip of the screw rod pressurizes the fluid stored in the front shaft and supplies it to the nib at the tip of the front shaft.

However, the structure described above has the advantage that even if the stored fluid is a highly viscous liquid, the piston can press the fluid and reliably supply it to the pen tip. However, it is necessary to rotate the rear shaft with respect to the front shaft, and in addition to changing the grip of the shaft cylinder each time and operating with both hands, there is a problem in that it is troublesome to adjust the amount of fluid supplied by rotating the rear shaft. was.

(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 rotating 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 fitted into a detent hole in the shaft cylinder so as to be slidable only in the longitudinal direction, and a ratchet wheel having a plurality of pawls is screwed onto the threaded rod so as to be rotatable without moving back and forth with respect to the shaft cylinder. An elastic body having a C-shaped cross section and having an engaging portion that can be engaged with the pawl of the ratchet wheel is fixed at one end in the shaft cylinder and disposed so as to be expandable in diameter, and the other end of the elastic body has a C-shaped cross section. can be pressed by an operation knob rotatable in the circumferential direction about the shaft center, the leg portion of which is inserted into a hole provided in the shaft tube.

(Example) Hereinafter, an example 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. The applicator 1 is fitted onto and fixed to a pipe section 4 that communicates with the pipe section 4. etc.,
The applicator 1 can be modified in various ways depending on the type of fluid used. Reference numeral 5 denotes a fluid storage chamber provided in the barrel 2, and the fluid storage chamber 5 stores liquids and powders for use in cosmetics, writing, and the like. 6 is the fluid storage chamber 5
It is a piston that is slidably installed in the 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 fixedly arranged at a predetermined position within the shaft tube 2, and the annular body 9 has a detent hole 10 in the center thereof into which the threaded rod 7 is slidably fitted only in the longitudinal direction. . Numeral 11 is a ratchet wheel for screwing a screw hole formed in the center behind the detent hole 10 into the screw rod 7, and the ratchet wheel 11 has a pawl 1 that tilts in one direction.
2, and is rotatably arranged with respect to the shaft tube 2, although its back and forth movement is restricted. 13
is an elastic body with a C-shaped cross section that has return elasticity, and the elastic body 13 has an outer diameter smaller than the inner diameter of the shaft cylinder 2, and has one end fixed to the inner surface of the shaft cylinder 2, and is inserted into the shaft cylinder 2. The diameter can be expanded freely. Moreover, the elastic body 1
3 has an engaging portion 14 on its inner surface that can engage with the pawl 12 of the ratchet wheel 11, that is, the elastic body 1
If an external force is applied to the wheel 3 to expand its diameter, the engaging portion 14 will engage the pawl 12 during the diameter reduction process upon return, and the ratchet wheel 1 will
1 (rotated to the left in the illustrated example). Reference numeral 15 denotes an operating knob having a leg 17 inserted into a hole 16 of the shaft tube 2 so as to be rotatable at a predetermined angle with respect to the axis. 13 is in contact with the other end.
Reference numeral 18 denotes an elastic piece for preventing the ratchet wheel 11 from reversing, which is provided on the elastic body 13 that elastically engages with the pawl 12 of the ratchet wheel 11.

(Function) Hereinafter, the fluid supply operation of the above-mentioned embodiment will be explained as follows.
This will be explained with reference to FIGS.

When supplying the stored fluid to the application section 1, the third
When the operating knob 15 is rotated clockwise with a fingertip from the normal state shown in the figure, the end of the elastic body 13 is pressed by the leg part 17 of the operating knob 15, and the diameter expands within the shaft cylinder 2 as shown in FIG. become. If you release your fingertip from the operation knob 15, the elastic body 13 will return to its reduced diameter due to its own elasticity, but in the process of reducing its diameter, the elastic body 13 will hold the engaging portion 14 against the claw of the ratchet wheel 11. 12, and the ratchet wheel 11 can be rotated counterclockwise along with the diameter reduction, so that the screw rod 7, which is screwed onto the ratchet wheel 11, is advanced along the detent hole 10. The piston 6 at the front end of the screw rod 7 can pressurize the fluid stored in the fluid storage chamber 5 and supply it to the application section 1. The series of operations described above can be performed continuously by simply rotating the operation knob 15 with a fingertip, so that the desired amount of fluid can be quickly supplied to the application section 1. can.

In addition, in the fluid supply operation described above, the elastic body 1
3, the elastic body 13 may come into contact with the ratchet wheel 11 and cause the ratchet wheel 11 to rotate. 11 The elastic piece 18 for preventing reverse rotation is attached to the ratchet wheel 1.
It is preferable to engage the claw 12 of No. 1. Further, the engaging portion 14 of the elastic body 13 described above is not necessarily the same as the elastic body 13.
As shown in FIG.
A similar effect can be obtained even if the engaging portion 14 is provided at a side surface position.

(Effects of the invention) As described above, according to the invention, if the operating knob provided on the barrel is rotated to expand the diameter of the elastic body disposed inside the barrel, the elastic body returns to its reduced diameter due to its own elasticity. The ratchet wheel is rotated by a predetermined amount by the engagement part of the elastic body, and the screw rod screwed into the ratchet wheel is advanced, and the piston at the front end can supply the stored fluid to the application part. It is possible to provide an applicator that is extremely easy to supply 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 the line A-A in FIG. 1, and FIG. 3 is a sectional view taken along the line B-B in FIG. 1. 4 is an external perspective view of the elastic body shown in FIG. 1, FIG. 5 is a sectional view for explaining the operation, and FIG. 6 is an external perspective view showing another example of the elastic body. DESCRIPTION OF SYMBOLS 1... Application part, 2... Shaft cylinder, 5... Fluid storage chamber, 6... Piston, 7... Screw rod, 10... Rotation hole, 11... Ratchet wheel, 12... Pawl, 13... …
Elastic body, 14... engaging portion, 15... operating knob.

Claims (1)

[Scope of utility model registration request] An applicator 1 is provided at the tip of the barrel 2, and a piston 6 is provided in the liquid storage chamber 5 in the barrel 2 that communicates with the applicator 1.
A screw rod 7 is slidably provided, and a screw rod 7 that can move forward by pressing the piston 6 is fitted into a detent hole 10 in the shaft cylinder 2 so as to be slidable only in the longitudinal direction.
A ratchet wheel 11 having a plurality of pawls 12 is attached to the shaft cylinder 2.
An engaging portion 14 that is rotatably screwed together without moving back and forth with respect to the ratchet wheel 11 and can be engaged with the pawl 12 of the ratchet wheel 11.
An elastic body 13 having a C-shaped cross section is attached to the shaft tube 2 at one end.
The other end of the elastic body 13 is inserted into the hole 16 provided in the shaft tube 2 in the circumferential direction with respect to the shaft center. An applicator that can be pressed with an operation knob 15 that can be rotated.