JPH1057853A - Pump dispenser and its childproof mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to easily secure the smooth ascent and descent of a piston and provide a childproof mechanism suited for the operation. SOLUTION: A conversion mechanism 17 is equipped with a freely rotatable pinion 38, a rack 40 formed monolithically on the lateral face of a vertical pipe 16a for a piston 16 and a sector gear 42 formed integrally on the back face of a trigger 12. The conversion mechanism 17 enables the conversion of the rocking motion of the trigger 12 to the internal ascending/descending motion of a cylinder 14. In addition, a nozzle cover 50 which closes a window part 48 in front of a cover 45 is monolithically molded with the cover 45 through a hinge 52. Further, a nozzle receiver 68 which is engaged with the lower face of a nozzle 16b at a position in which the nozzle cover 50 is closed, is provided projecting in one piece with the inner face of the nozzle cover 50.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a piston lifted up and down in conjunction with the swinging of a trigger, whereby liquid in a container is sucked into a cylinder on a vertical axis and pressurized, and this pressurized liquid is integrated with the piston. The present invention relates to a pump dispenser that flows out of an orifice at the tip of a nozzle that moves up and down and a child proof mechanism thereof.

[0002]

2. Description of the Related Art Due to the environmental problem of destruction of the ozone layer due to chlorofluorocarbon gas, a pump dispenser which pressurizes and discharges a liquid by reciprocating a piston interlocking with the swing of a trigger without using chlorofluorocarbon gas has been receiving particular attention in recent years. .

As a pump dispenser of this type, for example, a configuration disclosed in US Pat. No. 5,156,304 is known. In this pump dispenser, a cylinder is disposed on a vertical axis, and a piston is provided so as to be able to move up and down in the cylinder. In addition, a supply head having a nozzle at the tip and defining a horizontal flow path therein is disposed in communication with the vertical flow path of the piston, and can press the supply head downward under its swing. A swing lever is provided so as to be interlocked with the trigger. Then, the pump is moved so that the pressurized liquid flows out of the orifice at the tip of the nozzle by sucking up and pressurizing the liquid in the cylinder as the supply head and the piston move up and down integrally with the swing of the trigger. The dispenser is configured.

[0004]

Here, in the above-mentioned known construction, since the movement trajectory of the swing lever and the supply head is different, the swing of the swing lever with respect to the upper surface of the supply head causes the movement. The deviation of the movement trajectory is guaranteed. However, in order to slide the swing lever on the upper surface of the supply head, the frictional resistance between the abutting portions must be increased unless the surface accuracy of the abutting portions is increased. Operation may be hindered.

[0005] Therefore, the shaping operation of the swing lever and the supply head is complicated, and the working efficiency is likely to be reduced.

Incidentally, in a general pump dispenser having a trigger, an unintended pushing of a trigger caused by a fall of a container or mischief of a child such as an infant (hereinafter referred to as an infant) is prevented, and an orifice is provided. A so-called child proof mechanism (accident prevention mechanism) for preventing liquid from flowing out of the apparatus is known.

As such a child-proof mechanism, for example, a configuration is known in which the front of the orifice is liquid-tightly covered by an openable and closable nozzle cover provided at the tip of the nozzle (for example, JP-A-07-047312). In such a configuration, the nozzle cover is integrally formed at the front end of the nozzle via a hinge, and the nozzle cover is held at a position in front of the orifice, and a sealing member or the like provided on the inner surface of the nozzle cover is used. The sealing of the orifice front surface makes it possible to prevent the liquid from flowing out of the orifice.

However, while the nozzle of a known general pump dispenser is fixed,
In the configuration disclosed in USP No. 5,156,304, since the nozzle moves up and down together with the piston, it is difficult to employ a known child proof mechanism having a nozzle cover and a nozzle cover integrated with a nozzle cap, which involves an overall increase in size of the nozzle. Has become.

Here, a configuration is conceivable in which the swing of the trigger itself is prevented, and the outflow of liquid caused by the swing of the trigger can be prevented. In such a configuration for preventing the trigger from swinging, a stopper piece that can be installed between the trigger and a rotatable bottle cap or the like for mounting the pump dispenser on the container is normally folded at the lower end of the trigger. It is provided integrally so as to be tuneable. However, this USP No.5,1
In the configuration in which the cylinder is disposed on the vertical axis as disclosed in JP-A-56-304, a large swing range of the trigger is usually secured, so that the size of the stopper piece and, consequently, the size of the trigger cannot be avoided.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pump dispenser and a child proof mechanism for the pump dispenser, which can easily ensure smooth lifting and lowering of a piston and reliably prevent outflow of liquid caused by unintended swing of a trigger. I have.

[0011]

In order to achieve this object, according to the pump dispenser of the present invention, the piston is held up and down by the housing located at the top of the cylinder, and the housing is provided with a trigger. Is pivotally attached to the robot. The swinging motion of the trigger is converted by the conversion mechanism into the vertical movement of the piston on the vertical axis. The conversion mechanism includes a rotatable pinion supported by the housing, a rack integrally formed on the side surface of the vertical pipe of the piston and meshing with the pinion, and a sector gear integrally formed on the rear surface of the trigger and meshing with the pinion. And is provided as a unit.

Also, a hollow cover having a substantially inverted U-shaped cross section capable of covering from the conversion mechanism to the tip of the nozzle is formed with a front window having a length corresponding to the range of movement of the piston. The nozzle cover that covers the front of the orifice by closing the window portion is rotatable between its closed position and the open position removed from the front of the orifice and can be held at each position. It is formed integrally with the cover via the cover. A nozzle receiver which can be engaged with the lower surface of the nozzle at the closed position of the nozzle cover is integrally provided on the inner surface of the nozzle cover.

[0013]

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

As shown in FIGS. 1 and 2, in a pump dispenser 10 according to the present invention, a trigger 12 supported to be swingable in the front-rear direction and a piston slidably disposed inside a cylinder 14 are provided. 16 is a conversion mechanism that converts the swinging motion of the trigger into the linear motion of the piston in the cylinder.
It is connected via 17 via a link. The dispenser 10 is detachably attached to the container 18 by screwing the bottle cap 20 to the mouth 18a of the container, and reciprocates the piston 16 inside the cylinder 14 due to the swinging motion of the trigger. Thus, the liquid is sucked up from the container and pressurized, and the pressurized liquid is caused to flow out of the orifice 22 at the nozzle tip.

The piston 16 is formed, for example, in a substantially L shape integrally having a vertical pipe 16a and a horizontal pipe 16b, and a vertical flow path 24 and a horizontal flow path 25 are continuously defined therein.

In this piston 16, a horizontal pipe 16b located at the upper end of the vertical pipe 16a functions as a nozzle. That is, in the dispenser 10, the nozzle (horizontal pipe) 16b is integrally formed as a part of the piston 16.

As shown in FIGS. 1 and 2, in this embodiment, in order to facilitate the formation of the piston 16, the cylinder 27 is fitted and fixed to the vertical tube 16a of the piston. And a skirt-shaped sealing piece 26 that can slide on the inner wall of the cylinder 14 is formed at the lower end of the cylindrical body.

In the present invention, the cylinder 14 formed as a straight, substantially tubular body is disposed on a vertical axis along the liquid suction direction. Then, the insertion of the vertical tube 16a with the skirt-shaped seal piece 26
However, it is arranged to be slidable inside the cylinder 14, that is, to be able to move up and down.

As shown in FIGS. 1 and 2, the cylinder 14
For example, it is formed with a flange 14a at the upper end. Then, the bottle cap 20 having a female screw 20a which can be screwed into a male screw formed on the mouth 18a of the container is connected to the gasket 21 under the engagement of the inner flange 20b with the cylinder flange 14a, for example. Attached to the mouth of the container.

As shown in FIG. 2, for example, a housing 28 having a substantially U-shape in plan view is disposed and fixed on the upper end of the cylinder 14 by fitting a lower end 28a of a base thereof, and the like. By holding the nozzle (horizontal tube) 16b from the side by the pair of holding pieces 28b facing each other,
A piston 16 is supported by the housing so that it cannot rotate and can move up and down.

As shown in FIGS. 1 and 2, a notch 29 is provided in the holding piece 28b of the housing, and the upper end projection 12a is loosely fitted into the holding hole 29a through the notch, so that the trigger 12 is loosened. Are swingably supported in the front-rear direction.

In this embodiment, the housing 28 is formed separately from the cylinder 14. However, the present invention is not limited to this. The housing 28 may be formed integrally with the upper part of the cylinder in advance.

As can be seen from FIG. 1, in this embodiment, a suction tube 30 is integrally formed at the lower end of the cylinder 14, and through this suction tube, a liquid is sucked from the container 18 into the cylinder. Is possible. A primary valve 32 is disposed so as to be able to close the open end of the suction tube 30, and the primary valve corresponding to the reciprocating motion of the piston 16 in the cylinder 14 is opened and closed to move the cylinder 14 from the container 18 through the suction tube 30 to the cylinder 14. The flow of liquid to is controlled.

Further, for example, a compression coil spring 34 is disposed between the piston and the cylinder inside the cylinder as a return spring for biasing the piston 16 upward with respect to the cylinder 14.

Reference numeral 36 in FIG. 1 denotes a ventilation hole (a negative pressure prevention hole) for preventing a negative pressure inside the container from being caused by a flow of liquid from the container 18 to the cylinder 14 (suction). As the ventilation hole 36 is always between the skirt-shaped sealing piece 26 and another skirt-shaped sealing piece 37 formed at the upper end of the cylindrical body 27, even under the sliding of the piston 16 with respect to the cylinder 14, It is drilled in the side wall of the cylinder. The ventilation holes 36 are provided at, for example, three places separated by 120 °.

Here, as shown in FIGS. 1 and 2, in the present invention, the trigger 12 and the piston 16 convert the swinging movement of the trigger into a vertical movement of the piston on a vertical axis. Are linked so as to be interlockable.
The conversion mechanism 17 includes a pinion 38 rotatably supported by the housing 28, a rack 40 integrally formed on the side surface of the vertical tube 16a of the piston, and a sector gear integrally formed on the back surface of the trigger 12. Equipped with 42, rack with pinion, piston with each meshing of sector gear,
Unitized by the arrangement of triggers.

As shown in FIG. 2, in this embodiment, racks 40 are formed symmetrically on the left and right sides of the vertical pipe 16a of the piston, respectively, and a pair of pinions separated to the left and right are correspondingly formed. 38 is formed so as to be integrally rotatable via a support shaft 38a, and is capable of meshing with the pair of left and right pinions from the front (left side in the figure), respectively. Each is formed.

The pinion 38 is installed and pivotally supported between a pair of holding pieces 28b of the housing 28 by loosely fitting each end of the support shaft 38a into the holding hole 43a through the notch 43.

In such a configuration, the sector gear 42 rotates under the swinging motion of the trigger 12 about the upper end projection 12a, and accordingly, the pinion 38 moves in the corresponding direction about the support shaft 38a. To rotate. The linear motion of the rack 40 accompanying the rotation of the pinion 38 allows the piston 16 to move up and down with respect to the cylinder 14.

By the way, as shown in FIG. 1, in the pump dispenser 10, as described above, the members such as the conversion mechanism 17, the trigger 12, the piston 16 and the like are unitized around the housing 28. The unit body 44 is covered with a cover 45. That is, as shown in FIG. 1, when the dispenser 10 is mounted on the container 18, a portion (upper half) exposed at the upper portion of the container is
The dispenser is assembled with a cover 45 having a predetermined shape.

The trigger 12 and the bottle cap 20 are
Needless to say, it is removed from the object covered by the cover 45 and exposed (see FIG. 1).

As shown in FIGS. 1 and 2, the cover 45 is formed in a hollow shape having a substantially inverted U-shaped cross section, which is open at the bottom and can cover the unit body 44 from above. Then, as can be seen from FIG.
A hanging piece 46 that can be inserted into the notch 43 of the housing 28 is formed integrally with the inside, and the projection 46a of the hanging piece is fitted into the recess 43b of the notch, whereby the housing, that is, It can be attached to the unit body 44.

Here, as can be seen from FIG. 3 in addition to FIG. 1, in the present invention, the cover 45 is a unit body.
It is formed with a length in the front-rear direction (left-right direction in the figure) that can cover from 44 to the tip of the nozzle 16b, and has a length corresponding to the vertical range of the nozzle, that is, the vertical range of the piston 16. A window 48 is provided on the front surface of the cover 45. Then, the nozzle cover 50 covering the front of the orifice 22 at the nozzle tip by closing the window portion 48 of the cover moves between the closed position shown in FIG. 1 and the open position shown in FIG. 3 removed from the front of the orifice. It is rotatably formed integrally with the cover 45 via a hinge 52 at the upper end formed of a thin portion.

As shown in FIG. 2, in this embodiment, a pair of separation grooves separated from each other in the left-right direction is provided on a front wall 45a of a cover 45, and a portion separated by the separation grooves serves as a nozzle cover 50. The space formed by removing the nozzle cover is formed as a window 48 (see FIG. 3). And this nozzle cover 50
The thin portion is provided on the upper end portion of the nozzle cover, that is, on the line connecting the upper ends of the left and right separation grooves, so that the thin portion serves as the hinge 52 of the nozzle cover.

As shown in FIG. 2, in this embodiment, hinges 52 are formed separately at, for example, left and right positions of the nozzle cover 50.

In the present invention, the nozzle cover 50 can be held at the closed position and the open position, respectively. As shown in FIG. 1, in the closed position, for example, the nozzle cover 50 can be held by a lock means 57 composed of a combination of a projection 54 and a recess 56.

For example, a protrusion is formed on the side end face of the nozzle cover 50.
A protrusion 54 is provided (see FIG. 4), and a recess 56 into which the protrusion can be fitted and engaged is formed on an inner wall surface 45a at the front end of the cover facing the side end surface (see FIGS. 3 and 4). ).
That is, as shown in FIG. 1, the nozzle cover 50 can be held in the closed position for closing the window 48 on the front surface of the cover under the engagement of the projection 54 with the concave portion 56.

The nozzle cover 50 can be held at an open position by holding means 58. Here, in this embodiment, the central portion of the upper end of the nozzle cover 50 is partially left without being a thin hinge, and the nozzle cover 5 is provided between the central portion and the hinge 52 of the nozzle cover.
By providing a pair of left and right slits that partially engage both the cover 45 and the cover 45, a substantially rectangular shaped bent piece is formed between the nozzle cover and the cover, and this bent piece is used as the holding means 58.

The boundaries of the bent pieces (holding means) 58 with respect to the nozzle cover 50 and the cover 45 are formed as, for example, hinges 60-1 and 60-2 each having a thin portion, and bent at each hinge. Under the bent piece is the nozzle cover,
It is rotatable with respect to the cover.

The bent piece 58 functions as a spring member that uses a restoring force generated under elastic deformation in the extension direction as a biasing force, and the hinge 60-1 on the nozzle cover side of the bent piece.
Is above a straight line connecting the nozzle cover hinge 52 and the bent piece cover side hinge 60-2, the so-called neutral line 61, the restoring force pulls and holds the nozzle cover 50 to the open position. To the nozzle cover.

According to the bent piece 58, when the hinge 60-1 on the nozzle cover side of the bent piece goes below the neutral line 61, the force pulling the nozzle cover 50 downward causes the bent piece to be restored. Applied to the nozzle cover under force. That is,
The bent piece 58 also functions as a biasing unit that biases the nozzle cover 58 toward the closed position.

In the dispenser 10, the liquid flows out by the swing operation of the trigger 12 in the open position of the nozzle cover 50 shown in FIG. That is, when the trigger 12 projecting forward by the biasing force of the return spring (compression coil spring) 34 is pulled against the biasing force, the sector gear 42 in the counterclockwise direction in the figure with the upper end projection 12a of the trigger as the center. , The pinion 38 rotates in the corresponding direction, that is, clockwise. Then, due to the movement of the rack 40 downward due to the rotation of the pinion 38, the piston 16
It descends while sliding inside the cylinder 14.

The liquid in the cylinder is pressurized by the sliding (falling) of the piston 16 inside the cylinder 14, and the pressurized liquid is continuously specified to the vertical pipe 16a and the nozzle 16b of the piston. It flows through the vertical flow path 24 and the horizontal flow path 25, and flows out of the orifice 22 at the nozzle tip through the secondary valve 62 at the tip of the nozzle and the spinner (vortex member) 64, for example, as a spray flow. You.

The orifice 22 is, for example, a nozzle
16b is formed on a nozzle cap 66 fitted and fixed to the tip of the secondary valve 62, the spinner 64
Is prevented from falling off.

When the traction force is released after the trigger 12 is pulled, the piston is moved under the biasing force of the return spring 34.
16 is pushed up against cylinder 14. When the piston 16 rises, that is, when the rack 40 rises, the pinion 38 rotates counterclockwise, and the sector gear 42 rotates clockwise. Rocked until.

As the piston 16 rises, the cylinder 14
Is negatively pressured, and the liquid in the container 18 is sucked into the cylinder via the suction tube 30 and the primary valve 32.
Then, the liquid sucked into the cylinder 14 stays in the cylinder until the next towing operation of the trigger 12.

In other words, by the one-stroke operation under the condition that the trigger 12 is towed and the tractive force is released, the outflow of liquid
This type of pump dispenser 10 is configured so that suction is performed sequentially.

By the way, this kind of pump dispenser
Normally, when the trigger 10 is not used, the trigger 12 is in the protruding position, and there is a possibility that the liquid may flow out due to unexpected retraction of the trigger due to the fall of the container 18 or mischief of a baby or the like. Therefore, as can be seen from FIG. 4 in addition to FIG. 1, in the present invention, the nozzle, that is, the piston 16, is lowered at least partially by engaging the lower surface of the nozzle 16b at the closed position of the nozzle cover 50. Nozzle receiver to block
68 are integrally provided on the inner surface of the nozzle cover.

The nozzle receiver 68 is formed, for example, as a substantially semicircular arc-shaped protruding piece protruding from the lower part to a length capable of supporting the nozzle cap 66 at the tip of the nozzle. It is supported and reinforced by a rib 70 protruding integrally.

In such a configuration, if the nozzle cover 50 is held in the closed position, the nozzle receiver 68 is disposed below the nozzle cap 66 as shown in FIG. Thus, the lowering of the nozzle 16b, that is, the piston 16 is prevented. Therefore, the nozzle receiver 68 functions as a child proof mechanism (accident prevention mechanism) for preventing an unexpected swinging operation of the trigger 12. In other words, the pump dispenser 10 of the present invention
By being provided on the inner surface, unexpected accidents due to unexpected outflow of liquid are prevented.

In this case, it is preferable that a sealing body 72 that is in close contact with the front surface of the orifice 22 at the closed position of the nozzle cover 50 is integrally provided on the inner surface of the nozzle cover in addition to the nozzle receiver 68. In this configuration, the orifice 22 is sealed in a liquid-tight manner by sealing the orifice 22 with the sealing body 72 accompanying the closing of the nozzle cover 50, and the outflow of liquid from the orifice is prevented. That is,
When the nozzle cover 50 is closed, the liquid (residual liquid) left inside the nozzle 16b is reliably prevented from flowing out.

Therefore, also from this point, an unexpected accident or the like caused by an unexpected outflow of the liquid can be reliably prevented, and the child proof mechanism of the dispenser 10 functions effectively and reliably.

When the nozzle cover 50 is rotated from the closed position to the open position around the hinge 52, the nozzle receiving portion is rotated.
Since the seal 72 is removed from below the nozzle cap 66 and from the front of the orifice 22, respectively, the outflow of the liquid, which is the original purpose of the dispenser 10, is obtained by towing the trigger 12.

As described above, in the pump dispenser 10 of the present invention, the swinging motion of the trigger 12 is controlled by the conversion mechanism 17 including the sector gear 42 of the trigger, the pinion 38, and the rack 40 of the piston. Since the motion is converted into a lifting motion, smooth interlocking that is not affected by frictional resistance or the like can be easily secured.

Further, operability is improved because the interlocking failure between the components due to frictional resistance and the like can be reliably prevented. Further, the molding operation is simplified, and the operation efficiency is improved.

Further, the pump dispenser 10 of the present invention
In, since the cylinder 14 is provided to extend in the vertical direction which is the liquid suction direction, the cylinder is inserted and stored inside the container with the pump dispenser attached to the container 18. That is, according to the present invention, even if the effective length of the cylinder 14 is extended, the extension does not affect the upper part of the container 18 at all. It is possible to increase the number without a substantial increase in size.

A nozzle receiver 68 that can be engaged with the lower surface of the nozzle cap 66 at the closed position of the nozzle cover 50 projects from the inner surface of the nozzle cover as a child proof mechanism. As a result, the lowering of the piston 16 becomes physically impossible. That is, swinging of the trigger 12 due to overturning of the container 18 or mischief of an infant or the like becomes physically impossible, and an unexpected accident caused by unexpected liquid spill can be reduced to a simple configuration in which the nozzle receiver 68 is provided. Regardless, it can be reliably prevented.

Further, since the sealing body 72 which is in close contact with the front surface of the orifice 22 at the closed position of the nozzle cover 50 is integrally protruded from the inner surface of the nozzle cover, the orifice formed by the sealing body accompanying the closing of the nozzle cover is formed. By the sealing, the outflow of the residual liquid inside the nozzle 16b due to the falling of the container 18 can be surely prevented. Therefore, also from this point, an unexpected accident caused by an unexpected outflow of the liquid can be reliably prevented, and the child proof mechanism in the dispenser 10 functions effectively and reliably.

Here, in the embodiment of the present invention, the nozzle cover 50 can be held in the closed position under the engagement between the projection 54 serving as the locking means 57 and the concave portion 56, but is not limited to this. Instead, for example, the nozzle cover may be held in the closed position only by the restoring force of the bent piece 58 acting below the neutral line 61.

However, the projection 5 serving as the locking means 57
4. If the nozzle cover 50 can be held in the closed position by the engagement of the concave portion 56, the nozzle cover is firmly held in the closed position, so that the lower surface of the nozzle cap 66 and the nozzle receiver 68 can be easily and easily engaged. Obtained reliably. Therefore, the child proof mechanism functions more effectively.

If the nozzle cover 50 is held at the closed position by the engagement of the projection 54 and the concave portion 56, the orifice 22 can be securely sealed by the sealing body 72.
The child proof mechanism functions more effectively.

In this embodiment, a bent piece 58 provided between the nozzle cover 50 and the cover 45 is exemplified as a holding means for holding the nozzle cover at the open position. However, it is sufficient that the nozzle cover 50 can be held at least in the open position, and the configuration is not limited thereto. For example, a configuration using a separate spring member, a configuration including a combination of various hooks, and the like can be used. , May be used as holding means.

In this embodiment, the projection 54 of the locking means 57 is provided on the side end face of the nozzle cover 50,
Are provided on the inner wall surface 45b at the front end of the cover. However, conversely, a locking means 57 for holding the nozzle cover in the closed position may be constituted by a concave portion provided on the side end surface of the nozzle cover 50 and a projection provided on the inner wall surface 45a at the front end of the cover. .

Further, the locking means 57 is not limited to the combination of the projection 54 and the concave portion 56. For example, a pair of hooks which can be engaged with each other as shown in FIGS. A combination of a hook and an engagement hole may be used as the locking means.

Further, in this embodiment, the nozzle receiver 68 is illustrated as having a substantially semicircular shape. However, the shape is not limited to this as long as it can be engaged with the lower surface of the nozzle cap 66, and the nozzle receiver may be formed in a linear shape extending in the horizontal direction.

Although the rib 70 for reinforcing the nozzle receiver 68 is provided integrally below the nozzle receiver, this rib may be omitted if the nozzle receiver itself has a sufficient rigidity. Needless to say.

In this embodiment, the piston 16 is embodied as a substantially L-shape integrally having a vertical pipe 16a and a horizontal pipe 16a serving as a nozzle 16b. However, the vertical flow path 24 defined in the vertical pipe 16a and the nozzle 16b
The shape is not limited to an integral shape, as long as it can be formed as long as it can form a substantially L-shape that is continuous with the horizontal flow path 25 defined in
The piston 16 may be formed by a combination of a separate vertical tube and a nozzle.

Further, in the embodiment of the present invention,
As a configuration provided in the dispenser 10 including the conversion mechanism 17 including a combination of the pinion 38, the rack 40, and the sector gear 42, a child proof mechanism is embodied. However, the dispenser may be any dispenser that pressurizes and flows the liquid by raising and lowering the piston 16 with the nozzle 16b, and is not limited to the conversion mechanism 17 including the combination of the pinion 38, the rack 40, and the sector gear 42, and includes another combination. The child proof mechanism of the present invention may be applied to a dispenser having a conversion mechanism.

The embodiments of the present invention described above are intended to explain the present invention, and do not limit the present invention in any way. Modifications, alterations, and the like within the technical scope of the present invention may also be made. It goes without saying that all are included in the present invention.

[0070]

As described above, according to the pump dispenser of the present invention, the swing of the trigger is converted into the vertical movement of the piston by the conversion mechanism including the sector gear of the trigger, the pinion, and the rack of the piston. A smooth interlock that is not affected by resistance or the like can be easily secured. Therefore, there is no need to unnecessarily increase the surface accuracy, and the molding of the parts is simplified.

Further, it is possible to reliably prevent poor interlocking between components due to frictional resistance and the like, thereby improving operability.

Further, since the cylinder is provided along the vertical direction, the effective length of the cylinder can be extended without increasing the size of the appearance. And, since the swing of the trigger is converted into the reciprocating movement of the piston on the vertical axis, the swing range can be sufficiently reduced even when the piston movement range (elevation range) is increased, and the operating force is reduced. Is reduced. Therefore, the size of the exposed portion from the container is increased, and
The outflow amount of the liquid in one stroke of the trigger can be increased without lowering the operability.

According to the present invention, since the nozzle receiver protruding from the inner surface of the nozzle cover prevents the piston from descending, it functions as a child proof mechanism for preventing unexpected outflow of liquid. Therefore, a child-proof mechanism effective for a dispenser that moves up and down the nozzle can be easily secured irrespective of the simple configuration.

Further, if a sealing member that is in close contact with the front surface of the orifice is integrally protruded from the inner surface of the nozzle cover at the closed position of the nozzle cover, outflow of the residual liquid from the nozzle due to the falling down of the container can be ensured. Can be stopped. Therefore, also from this point, an unexpected accident can be reliably prevented, and the child proof mechanism in the dispenser functions effectively.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view of a partially broken pump dispenser according to the present invention in a closed position of a nozzle cover.

FIG. 2 is a schematic exploded perspective view of a partially broken pump dispenser.

FIG. 3 is a schematic longitudinal sectional view of a partially broken pump dispenser in an open position of a nozzle cover.

FIG. 4 is a partially cutaway perspective view of a cover as viewed from the rear.

[Explanation of symbols]

 10 Pump dispenser 12 Trigger 14 Cylinder 16 Piston 16b Vertical pipe 16a Nozzle (horizontal pipe) 17 Conversion mechanism 18 Container 20 Bottle cap 22 Orifice 26, 37 Skirt-shaped seal piece 28 Housing 38 Pinion 40 Rack 42 Sector gear 45 Cover 48 Window 50 nozzle Cover 52 Nozzle cover hinge 54 Protrusion 56 Recess 57 Locking means (holding means) 58 Bending piece (holding means) 60-1, 60-2 Bending piece hinge 68 Nozzle holder 72 Sealing body

Claims (4)

[Claims] 1. A substantially L-shaped piston is slidably disposed in a cylinder disposed on a vertical axis by inserting the vertical pipe into the cylinder, and interlocked with the swing of a trigger. In a pump dispenser in which a pressurized liquid flows out of an orifice at a tip of a nozzle which moves up and down integrally with a piston by suction and pressurization of a liquid in a cylinder by reciprocation of a piston, a housing located at an upper part of the cylinder is used. While the piston is held up and down freely, a trigger is swingably pivoted on the housing, and a conversion mechanism for converting the swinging movement of the trigger into a vertical movement of the piston on the vertical axis is supported by the housing. A rotatable pinion; a rack formed integrally with the side of the vertical tube of the piston to mesh with the pinion; And a sector gear meshed with the pinion, and a hollow cover having a substantially inverted U-shaped cross section capable of covering from the conversion mechanism to the tip of the nozzle has a length corresponding to the vertical movement range of the piston. The nozzle cover, which has a window portion on the front side and covers the front of the orifice by closing the window portion of the cover, is rotatable between its closed position and an open position removed from the front of the orifice. The nozzle cover is formed integrally with the cover via a hinge at the upper end of the thin portion so as to be able to be held at the position, and a nozzle receiver engageable with the lower surface of the nozzle at the closed position of the nozzle cover is integrally formed on the inner surface of the nozzle cover. A pump dispenser characterized by being protruded. 2. The pump dispenser according to claim 1, wherein the nozzle cover is formed integrally with an inner surface of the nozzle cover which can be brought into close contact with the front surface of the orifice in the closed position. 3. A substantially L-shaped piston is slidably disposed in a cylinder provided on a vertical axis by inserting the vertical pipe into the cylinder, and is interlocked with the swing of a trigger. It is configured so that the pressurized liquid flows out from the orifice at the tip of the nozzle that moves up and down integrally with the piston by sucking up and pressurizing the liquid in the cylinder by the reciprocating movement of the piston, and the upper half section is In a pump dispenser covered with a substantially inverted U-shaped hollow cover, the cover is formed to have a window having a length corresponding to the vertical movement range of the piston on the front surface, and the front of the orifice is closed by closing the window of the cover. The covering nozzle cover is rotatable between its closed position and the open position removed from the front of the orifice and can be held at each position via a hinge at the upper end made of a thin portion. A nozzle receiver that can be engaged with the lower surface of the nozzle when the nozzle cover is closed is integrally formed with the inner surface of the nozzle cover, and the nozzle holder can be prevented from descending by engaging with this nozzle receiver. A child-proof mechanism for a pump dispenser. 4. The child-proof mechanism of a pump dispenser according to claim 3, wherein the nozzle cover is formed integrally with an inner surface of the nozzle cover at a closed position thereof, the sealing member being capable of closely contacting the front surface of the orifice.