CN1240752A - Pump dispenser and method for making same - Google Patents

Abstract

The dispenser comprises a hollow body formed adjacent its upper end with an inward and downward annular flap. The method involves the molding of the body with the flap inclined upward. A tool is inserted into the open end of the body to fold the flap downward. In assembly, with the tool removed and the flap thus folded, the plunger moves past the flap so that the flap thereafter engages a shoulder on the plunger and forms an obstacle to the subsequent removal, accidental or otherwise, of the plunger.

Description

Pump dispenser and manufacture method thereof

The present invention relates to a kind of pump dispenser.Particularly relating to a kind of its inside has the pump dispenser of an energy reciprocating plunger in a hollow circular cylinder.Plunger wherein comprises a piston and an actuator up, and this actuator forms a discharging jet pipe.

License in the U.S. Pat 3062416 of Cooprider on November 6th, 1962, disclose a kind of liquid distributor, it comprises a ducted body and an integral type plunger, and this plunger comprises an actuator/piston.In ducted body, there is the head of an increase lower end of piston.And be provided with inlet one-way valve and outlet check valve, upwards push away this plunger with a spring.

In assembling process, behind ducted body that the plunger of cooprider is packed into, an instrument is withstood the upper end of ducted body with getting off.The shape of this instrument is made into the plastics that can make ducted body and is extruded inward forming a stop flange, thereby plunger is enclosed in the ducted body.

The present invention is a kind of pump dispenser and manufacture method thereof.This distributing box comprises a ducted body, and the inner periphery of ducted body opening is provided with a molded inside downward ring baffle.The plunger of distributing box operates in ducted body, and is stopped by baffle plate.The distributing box plunger by a spring with its roof pressure up.

The manufacture method of pump dispenser comprises molded ducted body with inside upwardly extending baffle plate.Open end with an instrument insertion ducted body is bonded with each other it and baffle plate, and makes the inwardly downward position bending of baffle plate.After removing the baffle plate bending and with instrument, plunger is inserted ducted body, it is engaged with baffle plate, and move down.Diameter on the plunger lower end diminishes, thereby forms the shoulder up of an annular.In case this shoulder moves past this piece baffle plate, baffle plate down just forms an obstacle, to stop removing or other accident of plunger.Like this, just plunger has been enclosed in the ducted body.

Owing to baffle plate is carried out molded, and adopted the downward step of bending of baffle plate, make to need not to adopt and forge step and make a for example disclosed stop flange in the cooprider patent.

The present invention also comprises plunger locking means, this plunger locking means has a pin and a bayonet slot outwardly, described pin outwardly is positioned on the plunger actuator, described bayonet slot is positioned on the wall of cylindrical top, be used to hold described pin and after the plunger commutation, overcome the elastic force that spring makes progress, plunger is moved down.

Look at following explanation and accompanying drawing by combining, those of ordinary skills will clearly understand other purpose of the present invention and technical characterictic, below all descriptions present invention is described with unrestriced form.

Accompanying drawing:

Fig. 1 is a part decomposing section of implementing a distributing box ducted body of the present invention and plunger;

Figure 1A be Fig. 1 shown in the local amplification profile of baffle area;

Fig. 2,3, the 4th inserts ducted body with instrument or core bar, the partial view that baffle plate is bent gradually downwards;

Fig. 5 is the amplification profile of the pump dispenser after the enforcement assembling of the present invention;

Fig. 5 A is the local amplification profile of a part among Fig. 5;

Fig. 6 is the part sectional view along 6-6 hatching among Fig. 5;

Fig. 7 is a local parts sectional view, has represented the actuator part and the ducted body top of plunger.

Pump dispenser of the present invention is represented by 10 in Fig. 5.Comprise a hollow circular cylinder 12 and an integral type plunger 14 of cooperating with each other.The threaded upper end that is looped around ducted body rotationally of sealing.

What should mention especially is ducted body 12, and it is cup-shaped basically, comprises a diapire 18, is provided with an inlet 20 in diapire central authorities, and inlet 20 is centered on by a tubular configured joint 22 down, is used to install a suction pipe 21.On opening, be provided with a bevelled annual seat 24 up.Cylindrical side wall 26 extends upward from the periphery of diapire 18, until a round mouth 26A.

Sidewall 26 (Fig. 1) extends upward, so that comprised a vent 27 and a tapered zone 28, and at these tapered zone 28 places, at surperficial 30 places, sidewall on the inboard of ducted body a little outwards opens (see figure 5), and along with approaching to the upper end of ducted body 12, sidewall is thickening gradually.On tapered zone 28, on the sidewall of the inboard of ducted body, be provided with an annular radial shoulder 32.In a cylindrical sleeves 34, sidewall extends upward from the periphery of this shoulder.Single-piece annular lip 36 stretches out from the mid point of sleeve, is separated from each other with this flange 36 and is positioned at this place above flange to be provided with a circumferential ridges 38.

Sealing 16 (see figure 5)s is threaded sealing, and it comprises a sidewall 40 and a roof 42, and roof is provided with an opening 44, is used in the ducted body upper end cylindrical sleeve 34 being installed.In installation process, because protuberance 38 has enough elasticity, opening 44 has enough edges, thereby allows by this protuberance roof to be blocked, thereby making to seal is clamped between protuberance 38 and the flange 36.

Seal enough loose grounds and be installed on the sleeve 34, thereby, seal and to rotate when when sealing the closing in portion (not shown) that screws in container.Certainly, when sealing when being screwed, flange 36 will be located in the top of container closing in portion, and in extruding the hermetically closing in portion of container of there.Plunger 14 comprises an elongated tubular piston 50, and piston 50 is formed by the tubular piston head 52 of a bar 51 and an increasing.At the middle shoulder up 54 that a narrow annular is arranged of piston head 52 and bar.The lower end of piston head is provided with a lip ring 56, and this lip ring engages with the inboard of the sidewall 26 of ducted body 12 hermetically.In inside, on sealing member 56, piston head has the surface down 58 of an annular.

As mentioned above, plunger 14 is tubuloses, and has an axial passage 64, and some all-in-one-piece ribs 66 inwardly can be set on this passage.

In the upper end of plunger 14 and with single-piece of its formation be an actuator 70.Actuator 70 inside are provided with a unidirectional valve pocket 72 (Fig. 5 A), are an annular lip 74 inwardly in the lower end of unidirectional valve pocket.A central ball retainer 76 stretches into the top of valve pocket 72 downwards from actuator head.The part that extends laterally of actuator 70 constitutes the jet pipe 78 (Fig. 5) with discharge-channel 80.

Ducted body 12 and plunger 14 form by plastic moulding, for example make of highdensity polyethylene, thereby have elasticity in thin place, and have rigidity in thick place.The elasticity in thin place is at piston packing 56 places and have advantage at baffle plate 100 places of adjacent sidewall 28, and this will be described herein-after.

The upper end of plunger 14 and sleeve 34 are provided with built-in blocking device.It comprises and is positioned at pin outwardly 110 (Fig. 6) radially relative on the plunger 14 and the bayonet slot 112 that is positioned at the pump housing 12 upper ends.Shown in Fig. 6 and 7, the lock part, bottom of groove is a radial opening 112A preferably.

The valve of distributing box comprises suction valve ball 81 and discharging valve ball 82, sucks valve ball 81 and is located on the valve seat 24 of the pump housing 12 lower ends, and discharging valve ball 82 is located on the lip inwardly 74 of plunger upper end.In assembling process, ball 82 is by being mounted from the bottom by lip 74 insertions by force.Be provided with a spring 84 between annular surface 58 and pump housing diapire 18, this spring 84 upwards pushes plunger.

Operating in of pump dispenser is known in the art, and be for example illustrated in the patent of Cooprider.

To the manufacture method of this distributing box be described below.In the process of the molded pump housing 12, up the baffle plate 100 inwardly of an annular forms an integral body with the pump housing 12, and it towards inside, and is positioned at the lower end of cylindrical sleeves 34 from annular shoulder 32.

Shown in Figure 1A, ring baffle 100 forms an integral body with the pump housing 12, and extends upward from contact 101 at the inward flange of shoulder 32, and slopes inwardly at flex point 102 places.Baffle plate 100 is spent to the angle of level from flex point 102 with about 45 and is extended to an end edge 104 inwardly.Between end edge 104 and flex point 102, baffle plate 100 slight narrowing down towards flex point 102 gradually.The narrowest thickness that baffle plate has in flex point 102 places helps to make the baffle plate bending at pump housing shaping.

In the process of making the pump housing 12 (Fig. 2), an instrument or core bar M are inserted the pump housing.When the lower end of this root core bar M entered the pump housing, core bar just engaged (Fig. 3) with baffle plate 100, and made baffle plate to inclined (Fig. 3).The continuation of core bar is inserted and will be made baffle plate be bent downwardly (Fig. 4).The shape of the baffle plate of Xing Chenging is downward-sloping by this way, and the baffle plate of this shape can not be made of method of moulding, and this is a cause of considering the pump housing 12 osed top lower ends.

Then core bar M is removed.

In the process of assemble pump (Fig. 1), plunger 14 is inserted into the pump housing 12.The lower end of piston head 52 engages with the inboard of baffle plate 100.The continuation of plunger is inserted and is made baffle plate open, and when the shoulder (Fig. 1) of piston passed through baffle plate 100, baffle plate 100 was just inwardly bitten piston rod towards the side of piston rod 51.Because the shoulder 54 on the piston is bonded with each other with the end edge 104 of baffle plate 100, thereby makes and plunger can not be pulled out.Like this, baffle plate has just become a lock, and plunger is locked in the pump housing.

Fig. 6 and pinch device shown in Figure 7 are to come stack-mounted like this, when the vertical section aligned of pin 110 and bayonet slot 112, and depression of plunger 14.Pin 110 is placed into the bottom of groove.Clockwise rotate plunger then, make on the horizontal slideway of pin 110 card entry slots 112 and slip into radial opening 112A.

The invention provides the low pump dispenser of a kind of cost.One of them important aspect is exactly that plunger 14 is enclosed in structure and manufacture method thereof in the pump housing 12.This importance comprises baffle plate 100, and certainly, the manufacturing process of baffle plate also is a part of the present invention.Compared with prior art, this blocking device need not optional feature, also need not speciality tool or forges step.

It is possible that product of the present invention and manufacture method thereof are carried out modification.Therefore, though only described an embodiment and a kind of method in the present invention, but the present invention is not limited thereto, scope of the present invention is to be determined by the wording in the appended claims, the wording of claims just scope of the present invention can be widened, thereby also further forbid making, using or sell by the related basis of doctrine of equivalents bright product and method.

Claims (7)

1, a kind of pump dispenser, the cylinder that comprises a molded hollow cup-shaped that forms, this cylinder has diapire and continuous sidewall that central authorities have an inlet, this sidewall upwards ends at a round mouth inside, sidewall and an annular defining baffle form an integral body, baffle plate is connected with sidewall an annular junction, baffle plate inwardly is inclined upwardly, and baffle plate is moved towards inside downward-sloping position around annular junction, thereby form a defining baffle, be used to stop shifting out of movable plunger in the pump housing.

2, pump dispenser according to claim 1 is characterized in that baffle plate is reduced at the thickness of junction.

3, pump dispenser according to claim 1, it is characterized in that pump dispenser also comprises an all-in-one-piece plunger, this plunger in the pump housing, can operate and and comprise a downward piston, this piston has an axial passage, and form by a tubular rod that engages with defining baffle, and has a piston head that is positioned at the plunger lower end, an actuator that is positioned at the plunger upper end, this actuator comprise one with piston in the side path that is connected of axial passage, tubular rod is arranged in the axial passage and has ring-type lip inwardly, these lips tilt towards the lower end, and lip extends towards the inside of axial passage, thereby but make their free bends, a ball, this ball only is positioned at axial passage, is located in usually on these lips, and between lip and actuator.

4, pump dispenser according to claim 3, it is characterized in that more near a surface of the lip of piston head inwardly and the neighboring edge of axial passage be spaced from each other.

5, pump dispenser according to claim 3 is characterized in that actuator comprises a tapered spherical block piece, and this block piece extends in axial passage, is used to limit moving up of ball.

6, pump dispenser according to claim 3 is characterized in that axial passage is provided with vertical rib inwardly.

7, a kind of assemble method of pump dispenser comprises:

A, provide one by the molded hollow circular cylinder that forms of elastomeric material, it has the upper end of an opening, and contiguous pump housing upper end forms an inside acclivitous annular defining baffle with a single-piece form in the pump housing, this baffle plate has that an annular that links to each other with wall is connected, a medial surface and an end inward flange

B, provide a cylindrical tool,

C, make an end of described instrument move into pump housing inside, instrument engaged with the baffle plate inboard, force inward flange to move down, bend thereby baffle plate is connected downwards around described annular,

D, provide a tubular plunger, there is the piston head of an increasing lower end of this plunger, is used for engaging with the surface of pump housing inboard, and this plunger has an inside shoulder and an elongate rod that is positioned at piston head top,

E, the upper end that plunger is inserted the pump housing, piston head inserts earlier, makes plunger engage with the medial surface of defining baffle, utilizes this piston head that baffle plate end inward flange is opened, thereby makes the end inward flange of baffle plate can stop that piston head upwards shifts out in the pump housing.

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