KR810001342B1 - Fountain tooth brush having bristle carrier easily producible by injection molding - Google Patents

Abstract

In a fountain toothbrush comprising a bristle carrier (3), a rigid-walled reservoir(10) for liquid or pasty denti frice, a piston pump(7,8) contains piston(7) for delivering toothpaste to toothbrush(4) from toothpaste container, the toothbrush contains valve apparatus consists of inlet valve (11,20) and outlet valve(16,22) having one slidably sent to piston(7) and the other to sleeve(8), and spring(23) maintaining outlet valve(16,22) to be closed and then inlet valve(11,20) to be closed to flow dentifrice freely from reservoir through duct toward bristles.

Description

Toothpaste Toothpaste

1 is an axial cross-sectional view of a preferred embodiment of a toothbrush for storing a toothpaste comprising a toothbrush with a handle and a detachable toothpaste that acts as a reservoir and is not integral with the toothbrush in accordance with the present invention.

2 is a cross-sectional view of the toothpaste and sleeve taken along line 2-2.

3 is a perspective view of the toothpaste shown in FIG.

4 is an axial enlarged sectional view showing a state in which the toothpaste protrudes out of the open end of the handle of the toothbrush while the toothpaste is caught in the toothbrush.

FIG. 5 is an axial cross-sectional view similar to FIG. 4 but showing the toothpaste being pushed into the handle of the toothbrush. FIG.

6 is a partial perspective view of another embodiment of the tubular member provided on the toothbrush.

FIG. 7 is an axial sectional view showing a state in which a part of the pipe member of the embodiment as shown in FIG. 6 is sandwiched in the piston.

The present invention relates to a toothbrush for storing toothpaste, in particular, a dispensing device for disassembling liquid or semi-liquid toothpaste is incorporated, and the toothbrush and the other end provided near one end of the toothbrush stand are part of the dispensing device. A toothbrush containing a toothpaste comprising a rigid handle comprising a liquid or semi-liquid toothpaste provided as a.

The dispensing device incorporated in the toothbrush holding the toothpaste is a piston supported by the toothbrush at the end of the toothbrush which is either liquid or semi-liquid toothpaste, a passage extending from the toothpaste through the toothbrush and the toothbrush facing away from the toothbrush. And, of course, a spring for pushing the toothpaste outward from the handle and facing toward the toothpaste, and a sleeve provided in the toothpaste, wherein the piston connects the passage connected to the passage and the toothpaste. It is inserted into the sleeve portion and can be moved to the active position and inactive position while being sealed in the sleeve portion, whereby the toothpaste is transferred to the toothbrush through the piston passage and tube when the piston is pushed toward the toothpaste in the sleeve portion, The toothpaste is in a handle with an open end away from the toothbrush When the shaft is inserted hagekkeum be movable in the direction of outer end protruding to the outside of the handle, and so as to feed the toothpaste on a toothbrush is configured such that it can be moved into the handle.

Toothbrushes containing toothpastes of this type are disclosed in US Pat. No. 3,937,582. However, when such toothbrush bars are manufactured using modern manufacturing methods, it is difficult to completely prevent toothpaste leakage during non-use of the toothbrush, such as when the toothbrush is held upside down.

Therefore, an object of the present invention is to provide a complete sealing to prevent toothpaste leakage even if the toothbrush is oriented upside down when the toothbrush is not used when manufactured with a thermoplastic resin by modern mass production method, that is, injection molding technology. Thus, to improve the toothbrush for storing the known toothpaste.

This object is a dispensing device configured to include a piston in which the end facing the toothbrush is firmly inserted into the tube of the toothbrush with a cross-sectional area towards the toothpaste and the tube member having at least one passage is inserted therein according to the invention. It is obtained by a toothbrush that holds the first described toothpaste that is incorporated into it.

The tube member may be a single tube in the axial center and inserted into the tube of the toothbrush such that the outer wall of the tube member may be in airtight contact with the inner wall of the tube.

Optionally, the tubular member may preferably have a plurality of axially extending grooves that are at least one outside or in the cylindrical wall, such that when the inner wall of the toothbrush stem tube is partially inserted into the tube of the toothbrush in such a manner, The groove is covered to form an axially extending passageway between the tubular member and the toothbrush. Thus, for example, four passages extending in the axial direction may be provided symmetrically with respect to the outer wall of the tube member.

In addition, in the dispensing device, the piston is provided with a sealing member at the end faced by the toothpaste so as to make a complete seal and at the same time more precisely flow out the toothpaste in a permanently hermetic contact with the inner wall of the sleeve. In the central passage, a valve body that moves relative to the piston is located to close the opening connecting the inside of the sleeve and the interior of the toothpaste as the piston advances into the sleeve. This opening is opened again when it is moved away from it.

Preferably, the valve body is provided with a spring against the piston to move from the piston barrel.

The passage in the piston may also be provided with a restricting portion which acts as a valve seat so that the valve seat is in close contact with the valve body while the toothpaste is moving away from the piston, while the piston and toothpaste are adjacent to each other. When it is moved, the valve body is separated from the valve seat portion, the passage of the pipe member and the inside of the sleeve portion is freely connected.

The objects and advantages of the invention will be apparent from the detailed description of the embodiments associated with the drawings.

The toothbrush holding the toothpaste shown in FIGS. 1 and 2 includes a toothbrush 3 which possesses toothbrush 4 at the front end as a housewife, and the toothbrush 3 is a rear end face of the rear end which is far from the toothbrush holder of the toothbrush. Near 3a there is an extension in the form of a rigid walled sleeve or outer wall, which extension is provided as handle 5 and the rear end 5a is open. Through this open end 5a, a toothpaste 10 containing a liquid or semi-liquid toothpaste is inserted. Tube 2 extends from rear end 3a of toothbrush 3 through toothbrush 3 to the toothbrush reservoir of the toothbrush and leads to a lateral outlet tube 2a located between the toothbrushes 4. The diameter of the toothpaste passage leading through tube 2 must be small enough at one point to cause capillary action for the toothpaste flowing through the passage depending on the viscosity of the toothpaste.

This ensures that the toothpaste does not accidentally spill out of the tube in the non-operational position and even when the front end of the toothbrush is turned down, shaken or thrown.

Piston 7 with lateral passage 17 fits tightly into wide area 2b of tube 2. Toothpaste 10 is inserted into handle 5 of toothbrush 3 and has a cylindrical sleeve portion 8 at shear wall 10b facing inward of handle 5.

Compartment 9 of sleeve 8 is freely connected to internal space 10a of toothpaste 10 by opening 11. The sleeve portion 8 is disposed on the shear wall 10b of the toothpaste 10 to align with the piston 7 and the inner width of the sleeve portion is such that a sealing member 7b secured to the shear surface 7a of the piston 7 can be inserted into the sleeve to form a seal within the sleeve portion 8. Provided, the sleeve portion and the piston together constitute a small pump.

The opening 11 of the new toothpaste 10 is sealed with a thin film before being inserted into the handle 5, but when the toothpaste is inserted into the handle 5, the thin film ruptures. Insertion of the toothpaste is made by the projection 10c provided in the outer wall of the toothpaste, ie the projection 10c with respect to the transverse end wall of the groove 5b so that it is inserted into the groove 5b extending laterally on the side wall of the handle 5 in the front direction of the toothbrush 4. Limited by contact.

The spaces 13 in the part of the rear end face 3 of the toothpaste spaced apart from the piston 7 and the other spaces 14 provided in the shear wall 10b of the toothpaste 10 at intervals from the sleeve 8 are arranged in line with each other, such that the toothbrush 3 and the toothpaste Receives both ends of spring 15, which acts as a return spring that separates 10 from each other. The movement of the toothpaste 10 away from the open end of the handle 5 by the action of the spring 15 is defined by bringing the protrusion 10c of the toothpaste 10 into contact with the transverse rear wall of the groove 5b. As a result, the toothpaste 10 cannot be separated from the handle 5. However, if the rear end of the toothpaste that protrudes out of the open end of the handle 5 is pulled more strongly, the somewhat soluble protrusion 10c can slide out of the groove 5b so that the empty toothpaste can be removed from the handle 5 and the new Toothpaste can be replaced. Instead of providing the elastic protrusion 10c, it is also possible to achieve such a purpose by having a sufficient elastic force in the toothpaste wall, particularly near the protrusion 10c.

If an opening is provided as shown in FIG. 1 instead of the groove 5b, for example, the fingertip can push the protrusion 10c inward and at the same time release it out of the opening by simply believing outward, thereby removing the toothpaste from the handle 5 You can easily pull the barrel 10.

For this purpose, the groove 5b can also be located closer to the front end of the handle 5, for example in the middle region.

The pin 10 protruding outward from the front face 7a of the piston 7 facing the toothpaste 10 acts to rupture the thin film of the toothpaste when the toothpaste is fully inserted into the handle. Preferably, this action occurs simultaneously with or slightly before the projection 10c is inserted into the groove 5b.

By injection molding, in the manufacture of the toothbrush 3 with the handle 5 integrally, providing a narrow and long tube 2 into the toothbrush 3 can easily break or bend the elongated core that is needed to make the tube. It is difficult because it is easy. Therefore, the tube is made to have a diameter larger than the desired diameter for controlled toothpaste outflow. In contrast, the tube member 32, preferably in the form of a hollow needle with a narrow lateral passage 33, can be firmly inserted into the tube 2 (shown in FIGS. 4, 5) having a large width.

The open front end 7c of the piston 7 is firmly seated by being pinched at the end 32a of the tube 32 or, in a somewhat different way, tightly bound to the wide area 2b of the tube 2 provided in the vicinity of the rear end face 3 of the toothbrush. In the illustrated embodiment, the sealing member is composed of an elastic sealing member 7b provided around the front end face 7a of the piston 7 facing toward the toothpaste 10 so as to be moved while being sealed to the inner wall 8a of the compartment 9 of the sleeve portion 8. Contact. The lateral piston passage 17 through the piston 7 opens at the center of the piston front face 7a and is provided as a valve seat 16 which is provided with a conical inclined annular shoulder in the middle region, leading to the passage 17b with a larger diameter. The passage 17b extends from the valve seat 16, which is an annular shoulder, to the passage opening 17a facing toward the toothbrush 4. The valve body 18 contained in the piston passage 17 consists of a contact plate or gasket 20 having a larger diameter adapted to be seated to be sealed against the inner surface of the transverse wall 11a separating the interior 10 of the toothpaste 10 and the interior of the compartment 9. And a hermetic portion 18a for closing the opening 11 located in the horizontal wall 11a. The contact plate 20 is provided with a pin 19 which protrudes through the opening 11 into the inner space 10a of the toothpaste container 10, and the diameter of the pin 19 is slightly smaller than the diameter of the opening 11.

The annular bottom 18b of the seal 18a of the valve body 18, facing toward the toothbrush 4, can be provided to oppose the shear face 7a of the piston 7, and the valve seat 21 protrudes from the lower surface 18b into the piston passage 17 and towards the toothbrush 4 It extends to the seat 16th. The valve stem 21 has a head 22 having a larger diameter at the free end, and the lower surface of the head facing away from the free end of the valve stem is preferably provided with a sealing surface 22a for an annular inclined valve. As such, the sealing surface 22a may be in contact with the valve seat 16 to be hermetically sealed.

The distance from the valve closing surface 22a of the head 22 of the valve body 18 to the surface of the contact plate 20 adapted to close the opening 11 and the distance between the piston front face 7a and the valve seat 16 are favorable When the airtight portion 18a is in intimate contact with the lower surface 18b and when the outer surface of the contact plate 20 rests on the transverse wall 11a of the sleeve portion including the opening 11, the valve head 22 can be lifted from the valve seat 16. The dimensions are set to be. Lifting of the valve is provided between the lower surface of the contact plate 20 facing the piston 7 and the front end surface 7a of the piston, which is applied to the spring force of the valve return spring 23 forcing the valve head 22 into hermetic contact with the valve seat 16. It will arise in the fight against it. Instead of being provided with 33 of a single lateral passage, the tube member 32 would have been provided with several (eg four) longitudinal grooves in the outer wall, as shown in FIGS. 6 and 7. These longitudinal grooves 33a are covered by the inner wall of passage 17 at the front end 7c of the piston 7 and by the inner wall of tube 2 downstream of the toothbrush 3, forming a plurality of passages, the horn 33a having a smaller and more uniform cross-sectional area. By providing a plurality of passages with smaller respective cross-sectional areas can be provided, resulting in the capillary shape required for the liquid toothpaste.

In fact, toothbrushes that hold toothpastes are used in the following ways: First, when the toothpaste 10 is inserted into the handle 5, the thin film sealing the opening 11 of the toothpaste 10 by the pin 19 held in place because the closing portion 18a of the valve body 18 comes into contact with the piston front face 7a. It bursts. The relative position of toothbrush 3 and toothpaste 10 at that time is as shown in FIG. In this position, the contact plate 20 is closed against the transverse wall 11a which already surrounds the opening by the spring force of the valve return spring 23 just before reaching the position to close the opening 11. Then, when the finger pushing the toothpaste 10 is released, the strong return spring 15 moves the toothpaste 10 in the handle 5 away from the rear end face 3a of the toothbrush 3, thereby moving the opening 11 of the toothpaste away from the piston 7. However, the sealing member 7b remains in hermetic contact with the inner wall 8a of the compartment 9 of the sleeve 8 until the position of FIG. 4 is reached. During this movement, the contact surface 20 will initially close the opening 11 for a short time when the head 22 of the valve body is already seated on the valve seat 16 but the spring is not fully tensioned yet.

Therefore, the pressure decreases in the pumping space surrounded by the inner wall 8a of the compartment 9 which acts as a cylinder. The return spring 15 moves the toothpaste 10 further outward relative to the handle 5 so that the contact plate 20 comes off the opening 11 when the annular valve sealing surface 22a of the valve spring 18 is held in contact with the valve seat 16. Thus, turning the toothbrush 4 downward will cause the liquid toothpaste to be drawn into the pumping space of compartment 9.

Any air remaining in the pumping space will rise to the outer upper end of the toothpaste 10 in the form of bubbles.

By pushing the back protruding portion 10d of the toothpaste 10 again with the finger, the piston 7 is again moved to the position as shown in FIG. Thereby, the opening 11 is first closed by the contact of the contact plate 20, and then, as the toothpaste and the piston come closer to each other, the spring 23 is compressed and the valve seat 16 moves away from the head 22 of the valve body, The head 22 is thereby moved to a wide area 17b of 17. As the piston 7 is further advanced into the pumping space of the compartment 9, the liquid toothpaste in the pumping space is removed from the pumping space from the valve seat 16 and the valve body until the piston front face 7a contacts the annular face 18b of the closure 18a of the valve body. Extruded through passageway 22 into passage 33. When the toothpaste is freed again, the sleeve 8 and the piston 7 will be returned from the position shown in FIG. 5 to the position shown in FIG. 4, and the toothbrush holding the toothpaste again applies a new batch of toothpaste to the toothbrush 4. Ready to be sent out.

Effective sealing of the opening 11 of the toothpaste 10 is, first of all, important for the safe functioning of the toothpaste combination toothbrush according to the invention, in particular for the extrusion of exactly one toothpaste from the toothpaste.

To this end, a sufficiently small gap should be provided between the spring 23 which is strong enough and the valve wall 21 and the inner wall of the piston passage 17.

Toothbrushes having a rigid wall, which includes a piston which can be inserted into a rear closed toothpaste and a valve mounted on the front wall of the piston, are disclosed in U. S. Patent No. 3,227, 165, but the toothbrush for carrying this known toothpaste In toothbrushes, the valves are not only composed of grooved rubber membranes that are not able to send toothpaste once to the toothbrush, but also make it difficult to produce the toothbrush using modern injection molding techniques.

Claims (1)

Toothbrush stand 3 provided with toothbrush 4, toothpaste 10 in which semi-liquid toothpaste is stored, and pistons movable relative to each other to transfer toothpaste from toothpaste 10 to toothbrush 4 A toothbrush for storing toothpaste comprising a piston pump (7, 8) having a (7) and a sleeve (8), wherein the valve seats (11a, 16) provided on the sleeve (8) and the piston (7), respectively. Each having a sealing member (20, 22) which forms a valve body that is reciprocally coupled to the piston (7) and slidably coupled to the piston (7), and which are connected to each other so as to be able to jointly act in the same direction by the valve seat (21). Seals the inlet valves 11a and 20, the valve device 18 consisting of the inlet valves 11a and 20 and the outlet valves 16 and 22 provided to the piston 7 and the other to the sleeve 8, respectively. It is disposed between the member 20 and the piston 7 and acts to keep the outlet valves 16 and 22 closed and after the inlet valves 11a and 20 are closed. Toothbrush head to a toothpaste characterized in that it comprises a spring (23) which seal is adapted to maintain the inlet valve (11, 20) closed.

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