JPS5830962A - Proper-quantity dispenser - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a dosage dispensing device for pastes, creams,
The present invention relates to a dispensing device capable of dispensing precise dosages of highly viscous products such as toothpaste or liquid soap.

A dispensing device for viscous products, previously known, for example from FR 1.596.074, consists of a substantially rigid body containing the product to be dispensed and an outlet for said production and movement. It is equipped with a hole and means that can be manually actuated to dispense the product.

This means consists of a piston driven within the body. A drive rack rod extending through the piston and integral with the push button allows the push button to be moved in reciprocal translation within the body.

A grip linkage piece attached to the piston causes the rack to move forward, but not to move back. The push button is
The spring applied to the bottom of the push button pushes it back in the returning direction.

The piston of the device described in French Patent No. 1,596,074 has a central part consisting of a radial strip which rests on a notch in the rack. These radial strips are believed to ensure a seal between the piston and the rack.

However, since these strips also have a gripping function, they cannot perform a sealing action accurately. The reason for this is that the paste product placed in the body tends to escape through the central part of the piston each time the push button is actuated, as each strip is then dislodged from the recess in the rack. ``Under these conditions, when the piston reaches the end of its travel, some amount of product is not dispensed. Furthermore, the paste product is practically not protected from air, which adversely affects its proper storage.

The purpose of the present invention is to eliminate these obstacles.

For this purpose, according to the invention, a piston is provided which is positively associated with the rack during its forward movement and which ensures sealing by different means at different height positions of this rack.

It is also an object of the invention to create a dosing device of the type described above which is simple, practical, reliable and of small dimensions.

Yet another object of the invention is to provide a device of the above type, which is of a particularly uncomplicated design, is disposable, and is sufficiently inexpensive to be made disposable.

It is thus an object of the present invention to provide a substantially rigid body for containing the viscous product to be dispensed, a discharge passage for the viscous product for dispensing on the outside of any body, and a discharge passage for dispensing the viscous product through the discharge passage. means manually operable to repeatedly dispense a viscous product of 0.
) a piston sliding within said body in a friction-free and leak-proof manner in the direction of said discharge passageway; (c) a rack located at one end of the body, formed integrally with the rack so as to move the rack between the two positions, and restorable by a spring applied to the underside; a viscous product, comprising: a pushbutton adapted to be pushed back in the direction; and a) a grip linkage piece formed integrally with the piston and adapted to allow the piston to cause a forward movement of the rack, but not a return movement. In the dosage dispensing device, the piston is provided with a lip in the center thereof forming a passageway for the rack and ensuring a seal between the rack and the piston, the outer diameter of the rack and the sealing the diameter of the internal bore of the retaining lip is sized to practically prevent leakage but reduce or eliminate friction so that the rack passes through the piston; ,
formed by at least one elastic flap inclined towards said rack, said elastic flap (or elastic flaps) being molded integrally with said piston and adapted to cooperate with successive notches of said rack; The object of the present invention is to provide a novel product consisting of a dosing device, in which the end of the elastic flap constitutes a gripping lip separate from the sealing lip.

According to a preferred construction of the sealing lip according to the invention, the piston is provided with a central skirt through which the rack passes, and the peripheral edge of said skirt on the side of the compartment in which the viscous product is located is contracted to form the sealing lip. That's what I do.

Depending on the preferred structure of the gripping link lip, the gripping link lip is formed by the ends of elastic flaps, the other ends of these flaps being formed by the ends of the skirt or by the skirt supported by the piston. It is integrated with a part of. The gripping linkage lip has two diametrically opposed elastic flaps which apply a driving force to the piston in the center of the piston without causing the piston to become unbalanced or jammed. That's how it is.

In this case, it is advantageous to fasten the two elastic flaps forming the gripping lip by means of two diametrically opposed skirt parts.

As is well known, the periphery of the piston is provided with at least one lip which ensures a tight seal between the piston and the inner wall of the cylindrical body. The giston can slide frictionally within the body. According to the particular construction of the piston, in its top part the piston carries two circumferential lips which ensure a seal between the body and the piston, and in its bottom part each is located in a cylindrical wall extension. It consists of a cylindrical wall supporting two skirts facing each other along the diameter formed by the cylindrical skirt parts, and a wall sloping toward the rack. The two inclined walls described above are interconnected by a wall perpendicular to the piston axis. This wall has a central hole defined by a skirt that supports a sealing lip.

A rack has at least one symmetry with respect to 1,000 planes, and is rotationally symmetric.

According to an advantageous feature of the invention, the spring is integrally molded onto the push button and the rack.

In a particularly advantageous variant of the invention, the device comprises four molded parts of plastics material, namely an open end and a passage hole for the rack at a distance from the other end. a cylindrical body having an inner wall; an integrally molded pivot stop that can be secured by interlocking with the open end of the body;
Similarly, it is integrally molded and one end passes through the hole in the wall and the next
a pushbutton-rack unit with an axial rack terminating in the pushbutton with an integral elastic strip that exits the body and slides within this body and rests against said body wall forming a return spring; It consists of a piston.

According to a modification of the base piece of the body end on the side opposite the push button, this body end is such that the attachment provided with the end fitting forming the discharge channel is closed off by the bottom. Said passageway can be closed by a cap which ensures stable support of the device.

In an advantageous variant of the invention, a cuttable peripheral strip (preferably attached to the push button) at the level of the push button and the body is provided.
It is advantageous to provide an IJ knob.

This strip prevents the push button from moving in the release or forward direction unless the push button is pressed hard enough to break the strip.

Embodiments of the dosage dispensing device of the present invention will be described in detail below with reference to the accompanying drawings.

The toothpaste dispensing device 1, which is made of only four molded parts as shown in FIGS. 1 and 2, is therefore particularly inexpensive to manufacture and assemble.

The dispensing device 1 comprises a cylindrical body 2 having a protrusion 3 at its lower end which is fitted by engaging with a groove 4 around the bottom 50 with a gripping action. 5 is provided with an end fitting forming a discharge hole 6 and a peripheral wall 7 which surrounds the end of the body 2 and is formed with a peripheral groove 4. Also provided on the inside of the body 2 is an internal sealing lip. The part 8 is pressed in. The attachment is such that the bottom part 5 is connected to a movable cup-shaped cap 9. The cap 9 is connected to an end fitting forming a discharge hole 6 located eccentrically in the bottom part 5. It is pivoted to the bottom 5 by means of film-like hinges 10 arranged in diametrically opposite areas.The attachment is achieved by molding the bottom 5, cap 9 and hinge 10 together as a unit.Cap 9 The cap 9 may be provided with an external gripping projection 11 on the opposite side of the hinge 10 that allows the user to easily grasp the cap 9 and pivot the cap 9 around the hinge 10 to open the discharge hole 6. In this case, a scar (9a) that fits the discharge hole 6 is formed inside.

The internal partition 12 is arranged near the upper end of the cylindrical body 2. The internal partition 12 has the shape of a conical trapezoidal funnel with walls facing toward the inside of the cylindrical body 2. A central passage 13 is formed in the internal partition 12 . The internal partition 12 divides the cylindrical body 2 into two sections, namely the internal partition 12. The attachment is inserted between the bottom part 5 and divides it into a large compartment for storing toothpaste and a small compartment opening toward the top. In this small compartment, a pushbutton 14 made of plastic material is used.
slide without friction. Furthermore, a circular lip 12a is formed on the internal partition 12 near the cylindrical wall of the body 2. The push button 14 is plate-shaped, and its periphery 15 is guided by the inner surface of the body 2 near the upper end. push button 14
is provided with a circular strip 16 on its periphery 15. The strip 16 rests against the end of the body 2 and the push button 14 will not close unless sufficient force is applied to the push button to break the strip 16 and separate it from the push button 14.
to prevent it from being pushed into the body 2.

The side of the pushbutton 14 facing towards the funnel-shaped internal partition 12 is connected to the internal partition 1 by means of a base spring 17 obtained by molding together with the pushbutton 14.
The return springs 17 rest against the internal partition 12 and the rib 12a and are diametrically opposed to each other, tending to push the pushbutton 14 back outwardly from the body 2, i.e. toward the top. It is formed by two elastic strips. These elastic strips are attached to the radial side of the push button 140 in its central region.

The push button 14 includes a drive rod 18 extending axially through the central passageway 13 of the internal partition 12 with a gap therebetween. The drive rod 1'8 is integral with the push button 140 on the radial side. The drive rod 18 is arranged along the axis of the dispensing device 1 and extends close to the lower end of the cylindrical body 2 . The drive rod 18 includes a rotationally symmetrical rack 1.
9 is provided. The rack 19 is formed by alternately providing grooves and flaps. It is clear that the first tooth 19a of the rack 19 is shaped in such a way that it faces towards the top through the central passage 13 of the internal partition 12 and prevents the rank 19 from being pulled out. The teeth 19a are beveled and the central passage 13 of the internal partition 12 is also beveled to allow the introduction and removal of the rank 19 through the central passage 13 of the internal partition 12 by deformation during assembly. It is preferable to make it so that it cannot be released. The tooth 19a is
In this way, the top position of the push button 14, which is pushed back upward by the action of the spring 1T, is fixed.

A piston 20 formed by a cylindrical wall 21 slides within the body 2 with friction. The cylindrical wall 21 is provided with two peripheral lips 22a at its top portion for sealing between the inner wall of the body 2 and the piston 200.

22b are formed, and the bottom portion includes two diametrically opposed gripping flaps 24, each supporting a gripping connection flap 24, which will be described below.
two scars) 23.23 are formed.

Each skirt 23 is formed in practice by a cylindrical skirt part 23a located in an extension of the cylindrical wall 21 and by a wall 23k) which slopes inwards in the direction of the rack 19 and joins at the bottom to the bottom of the skirt part 23a. It is formed. , the two walls 23b, 23b are connected to each other at their top portions by a wall 25 perpendicular to the piston axis. wall 25
has a central hole 26 formed by a generally cylindrical skirt 27 that flares slightly at the top on the side of the internal partition 12 to facilitate the introduction of the drive rod 18 with the rack 19.
It is equipped with The piston 2 is attached to the lower part of the skirt 27.
A trapezoidal circular lip portion 27a is formed to seal between the rack 19 and the rack 19.

The gripping linkage flap 24 is formed by an elastic strip with a free end that can cooperate with each notch in the rack 19. Each gripping link flap 24 slopes toward the top to form a gripping link lip. This lip is adjacent to sealing lip 27a, but is not the same as lip 27a.

To assemble the dispensing device 1, the drive rod 18 of one push button (7 buttons) is first introduced through the central passage 13 formed in the funnel-shaped internal partition 12, so that the first tooth 19a is inserted into the body 2. The pushbutton-rack unit is placed in position by lowering the drive rod 18 until it is positioned at the rear of the central passageway 13 at . The piston 20 is then introduced through the free hole in the body 2 and pushed by an elongated tool until it occupies a high position near the internal partition 12. Next, fill the body 2 with toothpaste and remove the bottom part 5.
and attach cap 9.

When the user wishes to dispense the toothpaste contained in the body 2, he pivots the cap 9 around the hinge 1o;
After opening the discharge hole 6 of the end fitting (. After orienting the fuselage 2 in the desired direction, the user presses the push button 14 against the spring 17 and moves the rack 19 in the direction of the discharge hole 6 of the end fitting. Just move it to .

This forward movement of rack 19 causes one of the teeth of rack 19 to
The grip-related flap 24 that was in contact with the rack is moved along the rack 19. Each gripping linkage flap 24 carries with it a piston 20 and thus moves the piston 20 with it during the overall forward movement of the rack 19 and pushes through the discharge hole 6 of the end fitting. The button 14, and therefore the piston 20, releases an amount of toothpaste corresponding to the distance moved. When the user stops the drive, the push button 14 is pulled by the return spring 17, and the push button 14 pulls the rack 19 of the drive rod 18 integral with it.
- Return to the starting position while carrying it with you.

The piston 20 also remains in its new lowered position due to the friction of its lips 22a, 22b. This results in rack 1
9 is moved along the center hole of the piston 20.

This movement is permitted by the gripping flap 24 which provides no resistance to the return movement of the rack 19 and pushbutton 14.

Thus, when the rack 19 returns to its top position, the gripping linkage flap 24 no longer falls into the same recess in the tooth set of the rack, but into a recess at a greater distance from the push button 14. The user then returns the cap 9 to the dispensing device 1.

In this way, by successively applying pressure to the push button 14, a virtually constant amount of each separate paste can be dispensed until the tip 20 reaches its lowest position near the bottom 5. Due to the sealing effect existing at the height of the lip 27a between the piston 20 and the rack 19, the paste put into the body 2 does not escape from the central part of the piston 20, and all of the product put into the body 2 is prevented from escaping. Or actually the entire amount is piston 2
Of course, upon reaching the lowest position of 0, a predetermined amount is dispensed one after another. Furthermore, the paste product is
Since the pistons 20 are in constant contact, they remain constantly protected from air and facilitate good preservation of the product.

The dispensing device according to the invention according to the modification shown in FIG. 6 is similar to that shown in FIG. ing.

At the lower end of the fuselage 2, the funnel-shaped attachment is closed by a bottom 28. Attachment is such that the conical wall 29 of the bottom part 28 is extended along its outer edge by a cylindrical wall 30, in the center of which a threaded hollow hole 31 forms a discharge passage for tooth brushing.
It is formed. An annular groove 32 is formed on the outside of the cylindrical wall 30. A peripheral retaining ring 33 formed on the inner wall of the body 2 is fitted into the groove 32.

The hollow hole 31 at the end is closed by a cap 34 formed by a bottom 35 that supports the dispensing device 1 in a balanced manner. Attached to the bottom part 35 are six coaxial skirts. The outer skirt 36 acts as a cover and is for this purpose an extension of the 20 cylindrical wall of the fuselage. The user manipulates the skirt 36 to screw on and unscrew the cap 34. A short inner skirt 37 is formed for the purpose of ensuring a tight seal, and for this purpose the clamps sometimes extend into the hollow holes 31 for the end fittings. The intermediate skirt 38 is formed with a male thread that is screwed into a female thread provided in the hollow hole 31.

In the variant shown in FIG. 6, the push button 39 is
It is formed by a plate-like body 40 having a cylindrical edge wall 40a and a bottom side 40b arranged laterally within the top hole of the fuselage 2. If desired, the plate 40 may be surrounded by a removable cap 41 having an outer scar (4.1a) enclosing a cylindrical edge wall 40a.

The return spring is formed by an elastic IJ knob 42 attached to the wall 40b near its periphery. The ends of each strip are formed with folds 42a to facilitate support by the funnel-shaped wall 12.

Although the present invention has been described in detail with reference to its embodiments, it is obvious that the present invention can be modified in various ways without departing from its spirit.

[Brief explanation of drawings]

1 is a perspective view of one embodiment of the dispensing device of the present invention in the open position; FIG. 2 is an enlarged axial cross-sectional view of the dispensing device of FIG. 1 in the used position; FIG. 4 is a perspective view of the piston of the dispensing device of FIGS. 1 to 6; FIG. 4 is a perspective view of the piston of the dispensing device of FIGS. 1... Dispensing device, 2... Body, 6... Release hole, 1
4...Push button, 11...Return spring, 19...
- Rack, 20...Piston, 24...Gripper connection flap, 27a...Lip-shaped part

Claims (1)

Claims: (1) a substantially rigid body containing a viscous product to be dispensed, a discharge passageway for the viscous product for dispensing outside the body; (a) means capable of being manually actuated to dispense a suitable amount of viscous product in waves, the means including: a piston that prevents sliding; (b) a rack extending within said body over substantially its entire length, passing through said piston and movable between two positions; and (c) located at one end of said body. and a push button formed integrally with the rack so as to move the rack between the two positions, and pushed back in the return direction by a spring applied to the lower side. ) a dosing device for viscous products, comprising a grip linkage piece formed integrally with the piston and allowing the piston of j to move the rack forward but not to move it back; A lip-like part is provided at the part to form a passage for the rack and to securely seal between the rack and the piston, and the outer diameter of the rack and the inner hole of the sealing lip are arranged in the front part. The diameter is dimensioned so that the rack passes through the giston to practically prevent leakage, but to reduce or eliminate friction, and the gripping linkage piece is sized so that it slopes toward the rack. each end of said elastic flap being formed by an elastic flap, said elastic flap (or elastic flaps) being molded integrally with said piston and cooperating with a successive notch of said rat; An appropriate amount dispensing device, characterized in that the portion constitutes a grip-related lip portion separate from the sealing lip portion. (2) the piston is provided with a generally cylindrical central skirt for passage of the rack, and the edge of the skirt on the side of the section of the body in which the viscous product is located defines the sealing lip; Dispensing device according to claim 1, characterized in that it is tapered so as to form a dosing device. (3) The gripping link lip is formed by an end of the elastic flap, and the other end of these flaps is integrally formed with an end of the skirt supported by the piston or a part of the skirt. An appropriate amount dispensing device according to any one of claims (1) and (2). (4) Claim (3) characterized in that the grip linking piece is constituted by two flaps facing each other along the diameter and supported by skirt portions facing each other along the diameter. Dosage dispensing device (5) according to paragraph 5, characterized in that the periphery of the piston is provided with at least one lip which ensures a seal between the piston and the inner wall of the cylindrical body. Characteristic Claim No. (
The appropriate amount dispensing device according to any one of items 1) to (4). (6) said piston is provided with: (a) a cylindrical shape bearing in its top portion two peripheral lips sealing between said body and said piston and in its lower portion each located in a cylindrical wall extension; a cylindrical wall formed by the skirt portion and supporting two skirts diametrically opposed to each other;
←) The two inclined walls are interconnected by a wall perpendicular to the axis of the cylindrical wall. The dispensing device according to any one of claims 11 to (5), characterized in that a center hole formed by the skirt for supporting the rack is provided. The dosage dispensing device according to any one of claims (1) to (6), characterized in that the dispensing device is symmetrical. (8) Pushing the spring on the side of the rack; Claims 11 to 11 are formed by a plurality of elastic strips supported by buttons.
7) The proper amount dispensing device according to any one of items 7). (9) the spring rests against an internal partition of the body located near the end of the body located on the side of the pushbutton and at a distance consisting of this end; Claim 1, characterized in that a central passage for a rack is provided and the internal partition is inclined so as to form a trapezoidal cone toward the end of the body opposite the push button. (Appropriate amount dispensing device according to any one of Items 11 to 8). 00) A stopper for the return spring of the rack is provided near the wall of the -1 body in the internal partition inclined in a trapezoidal shape. Claims (8) to (8) characterized in that an internal annular rib is provided to act as a piece.
9) The proper amount dispensing device according to any one of items 9). C01) The end of the body opposite to the push button, provided with an end fitting forming the discharge passageway, is closed by the bottom, so that the discharge passageway is properly secured to the dispensing device. Claims (1) to (1) are characterized in that they can be closed with a cap that can
9) The proper amount dispensing device according to any one of items 9). (12+) The cap is connected to the bottom by a film-like hinge, and the assembly is constructed from a single piece obtained by molding. Dispensing device. Level 0: the push button is provided with a cuttable circular strip around its periphery and at the end of the body;
Claims (11 to 11) characterized in that the push button is blocked by the circular strip while a force sufficient to break the circular strip is not applied to the push button. The dosage dispensing device according to any of the above.