JPH0620418Y2 - Applicator - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to liquid cosmetics such as nail polish, inks, paints,
The present invention relates to a device for ejecting and applying (including the concept of writing) a fluid having a relatively high viscosity such as a liquid medical product and an adhesive using a piston.

(Prior Art) As one conventional example of this type of applicator, Jitsuko 51-19
The applicator shown in Japanese Patent Publication No. 85 exists. In this known example, a screw rod is fixed to a pressing plate corresponding to a piston, a shaft having a screw hole is tightly fitted and fixed to a rotating portion, and the screw rod is screwed into a screw hole of the shaft to rotate the rotating portion. Is integrally rotated with the shaft to advance the pressing plate together with the screw rod so that the ink flows out.

(Problems to be Solved by the Invention) In the above-described conventional example, when the shaft is rotated together with the rotating portion, the screw rod may be dragged and rotated. It is necessary to increase the frictional force between the outer edge and the inner surface of the main body, or to devise some kind of rotation stop on the pressing plate. Also, since the rotating part and the shaft are tightly fitted and fixed, the rotating part does not move in the axial direction. When the external pressure is applied, the shaft moves a little along with the rotating part, and the screw rod and the pressing plate screwed to the shaft also move a little, and there is a risk that ink may unintentionally flow out. There is a point. The present invention is intended to provide an applicator having a novel structure that solves such problems.

(Means for Solving Problems) The applicator of the present invention devised to solve the above problems has a piston () which is rotated by a knob body (28) arranged behind the shaft cylinder (6). In an applicator adapted to move forward 7) to push out the fluid (3) and supply it to the tip applying member (33), arrange the fluid storage tank (4) behind the tip applying member (33), and A piston (7) is slidably fitted in the tank (4) in the axial direction, and a screw shaft (9) having a flat surface (8) on the side surface is integrally joined to the rear of the piston (7). Then, install the rotation stop (11) having the through hole (10) of the same shape as the cross-sectional shape of the screw shaft (9) into the barrel.
The screw shaft (9) is fixed non-rotatably to (6) and the screw shaft (9) is inserted into the through hole (10) to make the screw shaft (9) non-rotatable.
The rotation operation knob body (6), which has a fixed axial position with respect to (9) and whose rotational direction is restricted to only one direction, is screwed and disposed behind the barrel (6). 28) is integrated with the payout body (16) for rotation and is movably fitted in the axial direction.

(Embodiment) The illustrated embodiment of the present invention has a small diameter portion (1) at the front end and a large diameter portion (2) at the rear side of the large diameter portion (2) and substantially the front half portion thereof. A tank (4) filled with fluid (3) such as ink and a cylinder (6) with a polyhedral inner surface (5) formed behind the tank (4) and a watertight seal on the inner surface of the tank (4). A piston (7) that is slidably fitted in the axial direction while being in contact with it, and a flat surface portion (8) integrally joined to the rear portion of the piston (7) and on the opposite side surface.
The screw shaft (9) formed with the
It has a through hole (10) having the same shape as the cross-sectional shape of (9) and slightly larger, and is non-rotatably fitted to the front end of the polyhedral inner surface part (5) of the barrel (6). ), A rotation stopper (11) for rotatably and non-rotatably inserting the screw shaft (9) in the axial direction, and a flange (12) on the outer surface of the front end, which has a flange (12). ) A ratchet part (13) is formed on the rear surface part, a screw part (14) is formed on the inner surface part of the front end, and an outer surface part (15) of the polyhedron is formed on the rear end part. A feeding body (16) in which the shaft (9) is inserted and the screw part (14) is screwed onto the screw shaft (9).
The outer peripheral surface is a polyhedron and the ratchet part (17) is formed on the front part and the receiving seat (18) is formed on the rear end surface.
The ratchet part (17) is non-rotatably fitted to the polyhedral inner surface part (5) of (6) and is fitted to the outer peripheral part of the feeding body (16).
The spring receiver (19) that engages with the ratchet part (13) of the brim (12) of the feeding body (16) and the front end of the spring bearing (19) that is attached to the outer periphery of the feeding body (16). The front surface of the collar (12) of the feeding body (16) is kept in contact with the rear surface of the feeding body (16) by abutting against the spring bearing (19) and pressing the spring bearing (19) forward. A coil spring (20) for fixing the axial position of (16), a retaining body (21) fixed to the inner surface of the rear end of the barrel (6), and a seat (22) at the tip.
And an engaging projection (23) and a slit (24) in the axial direction and a small-diameter tubular portion (25) that is elastically deformable in the radial direction are provided at the front end portion, and behind that is the same as the axial tube (6). Large Diameter Tubular Part (26)
The inner surface of the large-diameter tubular portion (26) has a polyhedral inner surface (2
7) is formed, and the rear end portion of the above-mentioned feeding body (16) is inserted into the inner hole, and the polyhedral inner surface portion (27) and the polyhedral outer surface portion (15) are fitted to each other to form the feeding body (16). ) And the small-diameter cylindrical part (2
Insert (5) into the barrel (6) from its rear end and elastically deform the seat (22) and the engaging projection (23) to the front of the retaining body (21), and place it in the seat (22). Is a rotary operation that is rotatably attached to the barrel (6) by supporting the rear end of the coil spring (20) and locking the engaging projection (23) with the front edge of the retaining body (21). The knob body (28) for use with a front end small diameter of the shaft cylinder (6) that has a recess (29) on the front end face and opens a through hole (30) from the center of the recess (29) to the rear end face. The fitting (31), which is watertightly press-fitted to the inner surface of the part (1) from the front end port, and the rear end part (3).
Insert the guide pipe (32) press-fitted into the front half of the through hole (30) of (1) and projected a required length in front of the joint (31) and the guide pipe (32) from the rear end face to the inside. Fitting ends (31)
The hair-shaped application member (33) fitted and fixed in the recess (29) of the front end surface of the, and the application member (33) and the joint (31) are covered with the tip of the application member (33) protruding. Front small diameter part (1) of the barrel (6)
The cap (34) is screwed to the outer surface of the cap, and the cap (35) is detachably attached to the cap (34).

(Operation) When the knob body (28) is rotated, the feeding body (16) also rotates integrally, and the screw shaft (9) screwed to the feeding body (16) stops rotation.
Since the rotation is blocked by (11), the motion is converted into a linear motion and moves in the axial direction. The delivery body (16) has its ratchet portion (13) which is not rotatable with respect to the barrel (6).
Since it is meshed with the ratchet part (17) of 9), it can rotate only in one direction, and this rotation direction is set in the direction of advancing the screw shaft (9). As the screw shaft (9) advances, the piston (7) slides forward in the tank (4), fluid (3) such as ink is pushed out of the tank (4), and the through hole (30) of the joint (31) )
And is supplied to the coating member (33) through the guide pipe (32).
If external force is applied to the knob body (28) at the rear end in the axial direction due to a fall or the like, the knob body (28) and the feeding body (16) are slidable in the axial direction, so the knob body (28 ) Only slightly moves forward, but the feeding body (16) does not move and remains fixed. Therefore, the screw shaft (9) does not move forward together with the payout body (16).

(Effects of the Invention) The present invention is as described above. Since the rotation of the screw shaft is reliably prevented by mounting the rotation stopper, the piston is improved by increasing the friction between the outer edge of the piston and the inner surface of the tank to prevent the rotation. There is no problem that hinders the sliding. When the external pressure is applied to the knob body in the axial direction, the knob body slides on the feeding body to eliminate the influence of the external pressure on the screw shaft, preventing the fluid from leaking due to the piston's unintentional advance. Is effective.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a longitudinal sectional view, FIG. 2 is a lateral sectional view taken along the line AA in FIG. 1, and FIG. 3 is a line taken along the line BB in FIG. FIG. 4 is a cross-sectional view and FIG. 4 is a perspective view of main parts. (1) …… Small diameter part, (2) …… Large diameter part, (3) …… Fluid, (4) ……
Tank, (5) …… Polyhedral inner surface, (6) …… Shaft cylinder, (7) ……
Piston, (8) ... flat part, (9) ... screw shaft, (10) ... through hole, (11) ... rotation stop, (12) ... collar, (13) ... ratchet part, ( 14) …… Screw part, (15) …… Polyhedral outer surface part, (16)…
… Feeder, (17) …… Ratchet part, (18)… Catch, (19)
...... Spring holder, (20) ...... Coil spring, (21) ...... Prevention body, (2
2) …… Catch, (23) …… Engagement protrusion, (24) …… Slit, (2
5) …… Small diameter cylinder part, (26) …… Large diameter cylinder part, (27) …… Polyhedral inner surface part, (28) …… Knob body, (29) …… Recessed part, (30) …… Through hole, (31) …… Coupling, (32) …… Induction pipe, (33) …… Coating member, (34) …… Mouthpiece, (35) …… Cap.

Claims (1)

[Scope of utility model registration request] 1. A piston (7) is moved forward by a rotary operation of a knob body (28) arranged behind the shaft cylinder (6) to push out a fluid (3) to supply it to a tip coating member (33). In the made applicator, a fluid storage tank is provided behind the tip application member (33).
(4) is arranged, the piston (7) is slidably fitted in the tank (4) in the axial direction, and the rear surface of the piston (7) has a flat surface portion (8) on its side surface. (9) are joined together and screw shaft
A rotation stopper (11) having a through hole (10) having the same shape as the cross-sectional shape of (9) is fixed to the shaft cylinder (6) so as not to rotate and the through hole (1
The screw shaft (9) is inserted into (0) to make the screw shaft (9) non-rotatable, the axial position is fixed with respect to the screw shaft (9), and the rotation direction is restricted to only one direction. Screw the feeding body (16),
An applicator characterized in that a rotary operation knob body (28) arranged at the rear of the shaft tube (6) is fitted to the payout body (16) so that the rotation is integrated and is movable in the axial direction.