CN201626625U

CN201626625U - Vacuum pump

Info

Publication number: CN201626625U
Application number: CN201020119193XU
Authority: CN
Inventors: 李殷石
Original assignee: ELCOS (SUZHOU) Co Ltd
Current assignee: ELCOS (SUZHOU) Co Ltd
Priority date: 2010-02-21
Filing date: 2010-02-21
Publication date: 2010-11-10
Anticipated expiration: 2020-02-21

Abstract

The utility model discloses a novel vacuum pump, which comprises a button with a discharge hole, a shell, a shell cap, a cover jointed with the external surface of the upper part of the shell through the shell cap, a shaft moving along the internal surface of the shell cap vertically, a piston moving along the inner wall of the shell vertically, a spring disposed between the button and the shell cap, a switching element and a first rod moving along the vertical direction, wherein, a switching element is disposed at the lower end part of the first rod, the shaft is provided with a first channel communicated with the discharge hole of the button, the vacuum pump also comprises a second rod disposed in the shaft and extending along the shaft axially, the second rod is disposed along the external surface of the first rod in sliding way, and the lower end part thereof is provided with a radial bulge formed on the side face and facing outwards, a second channel that can be opened and closed is formed between the piston and the radial bulge, and the second channel is communicated with the lower end of the first channel. The utility model is easy in control of switch operation, and has the function of automatically recovering content at the liquid outlet.

Description

A kind of vacuum pump

Technical field

The utility model relates to a kind of vacuum pump that is installed in the container in the cosmetics containers particularly.

Background technology

Usually, vacuum pump is used in the cosmetics containers, goes out to be contained in wherein liquid or emulsion with convenient discharging (pump suction).Thereby existing vacuum pump comprises button with discharge orifice, constitutes the housing of the outward appearance of pump, the outside face by housing cap and housing top in conjunction with the lid of described housing is installed in container, be connected with the discharge orifice of button with along the bar of housing vertical shifting, be used for guide rod vertical shifting and be used for bar be connected to button spool, on being installed in bar the time along the piston of the inwall vertical shifting of housing, be installed in the spring on the inwall bottom of housing, and the ball that is used for opening and closing the receiver hole on the housing bottom.Existing this vacuum pump has the following disadvantages:

1, compression spring be arranged on enclosure interior in the tolerant introduction channel, compression spring plays the effect of choked flow like this, therefore need the large space in elastomeric spring or the housing, this demand has limited pump pressure and has increased the size of pump, and it is tolerant to be difficult to pump very sticking institute; In addition, because spring contacts with content, when compression spring was aging, content was contaminated probably.

2, the switch ball in the entrance hole of housing lower end is because the reason of the variation of the interior space pressure of housing and gravity opens and closes entrance hole, therefore control pump press operation and improve sealing force apace, thus, some tolerant may spilling in the pump pressure process from container, and switching manipulation can not be performed apace, and pump pressure is weakened like this; In addition, when temperature traverse and the variation of content viscosity, the effect of switch is with variation.

3, general shower nozzle has sprayed the back does not have to reclaim automatically the function of (contracting), at the liquid outlet place of discharge orifice content visible thing, easily causes polluting.

Summary of the invention

Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, and a kind of vacuum pump is provided, and its switching manipulation is easy to control and have an automatic recovery liquid outlet place content function.

For solving above technical matters, the utility model is taked following technical scheme:

A kind of vacuum pump comprises: button, and it has discharge orifice; Housing, it constitutes the outward appearance of pump; Lid, it engages with the outside face on housing top by the housing cap, so that described housing to be installed in container; Axle, it is along the inside face vertical shifting of described housing cap, and button is installed in the upper end of axle; The housing cap is used for the vertical shifting of leading axle, also is used for housing is connected to covering; Piston, it is along the inwall vertical shifting of housing; Spring, it is arranged between button and the housing cap, provides restoring force to give described axle in the pump pressure process; On-off element, it is positioned at the lower end of the inner space of housing, in the pump pressure process, to open and close the entrance hole in the housing lower end, with first bar, it moves in the vertical direction, and described on-off element is set in its bottom, wherein: described axle has the first passage that is connected with the discharge orifice of button, vacuum pump also comprises and being arranged in the axle, axially extended second bar along axle, second bar is mounted slidably along the outside face of first bar, the bottom of second bar have be formed on the side towards exterior radial projection, form the second channel that can open and close between described piston and the radial projection, this second channel is connected with the lower end of first passage.

Represent among the embodiment at one of the present utility model, first bar has the bottom of hollow, and on-off element is connected on the inside face of hollow of bottom of first bar.

According to an aspect of the present utility model, the inside face of second bar cooperates with the intimate of first bar, and so, second bar can be with first bar to move up when first bar is not defined.The bottom of described first bar is along the inwall vertical shifting of the bottom of housing, and is provided with mobile stop gear between the bottom of the bottom of housing and first bar.In a specific embodiment, the bottom of first bar has along a plurality of outstanding first bar surface that its circumferencial direction distributes and crooked up protuberance, this protuberance is along the inwall vertical shifting of the bottom of housing, described mobile stop gear comprises the outstanding projection that is formed on housing bottom inside face, when the protuberance of the first bar bottom moves to the projection present position, form buckle, continue to move up thereby limit first bar.

As a preferred embodiment of the present utility model: be formed with the third channel that can open and close between the bottom of described first bar and the housing, specifically, third channel can be designed to the taper that diameter from top to bottom diminishes gradually by the lower end with first bar and realizes.In addition, the space between a plurality of described protuberances also constitutes the passage that flows through for content.

Because the enforcement of above technical scheme, the utility model compared with prior art has following advantage:

1, spring is arranged on outside, reduces the flow resistance of content and prevents and pollute;

2, entrance hole is not to change by self-generated pressure in the vacuum chamber to open and close, but is realized opening and closing easily-controlled operation and quick by the control stalk master cock element of ad hoc structure;

3, in each parts Recovery Process, slide between relative first bar of second bar, form negative pressure in the space between them, thereby the content at the liquid outlet place of outage is sucked back, avoid the pollution of content and leaking of content.

Description of drawings

The utility model is described in more detail below in conjunction with accompanying drawing and concrete embodiment.

Fig. 1 is the vertical cross-section diagram according to vacuum pump of the present utility model;

Fig. 2 is a vertical cross-section diagram of the axle of vacuum pump;

Fig. 3 is the schematic perspective view of first bar of vacuum pump;

Wherein: 1, button; 10, discharge orifice; 2, housing; 20, entrance hole; 21, projection; 3, lid; 4, first bar; 5, axle; 6, housing cap; 7, piston; 8, spring; 9, on-off element; 11, second bar; 110, radial projection; 40, bottom; 400, protuberance; 50, lateral process; 12, first passage; 13, second channel; 14, third channel.

The specific embodiment

As shown in Figures 1 to 3, the vacuum pump according to present embodiment mainly comprises: have the housing with many stepped diameters 2, lid 3, first bar 4 of button 1 towards the discharge orifice 10 of its side, near cylindrical, along axle 5, housing cap 6, piston 7, spring 8, on-off element 9 and second bar 11 of the inside face vertical shifting of housing 2.Wherein, lid 3 is used on the container (not shown) pump being installed, and it mutually combines by housing cap 6 and housing 2.In this example, housing cap 6 is provided with respectively with lid 3, also they can be designed to one.Housing cap 6 is from the vertical shifting of outside seal housing 2 inner spaces and leading axle 5.Spring 8 is installed between the lateral process 50 and housing cap 6 of the upper end that is formed on axle 5.Axle 5 has the first passage 12 that is communicated with discharge orifice 10, being combined in cylindrical shaft 5 in-to-ins second bar 11 is mounted slidably along the outside face of first bar 4, and the inside face of second bar 11 cooperates with the intimate of first bar 4, thereby when first bar 4 was defined, second bar 11 can slide by relative first bar 4; And when first bar 4 is not defined, can move along with moving of second bar 11.The bottom of described second bar 11 have be formed on the side towards exterior radial projection 110, between piston 7 and radial projection 110, form the second channel 13 that can open and close, this second channel 13 is connected with the lower end of first passage 12.

On-off element 9 is positioned at the lower end of the inner space of housing 2, and it is used for the entrance hole 20 in pump pressure process opening and closing housing 2 lower ends.In the present embodiment, on-off element 9 is to drive by first bar 4 that moves in the vertical direction to move.As shown in Figure 1, the bottom that first bar 4 has hollow, on-off element 9 is connected on the inside face of hollow of bottom 40 of first bar 4.

Shown in Fig. 1,3, in the present embodiment, the taper that the lower end of first bar 4 diminishes gradually for diameter from top to bottom, thus between the bottom of first bar 4 and housing 2, formed the third channel 14 that can open and close.The bottom 40 of first bar 4 along the circumferential direction is distributed with a plurality of outstanding first bar, 4 surfaces and crooked protuberance 400 up, and described protuberance 400 moves along the inwall of the bottom of housing 2.The outwards outstanding projection 21 that forms of the inner wall surface of housing 2, at projection 21 places, the mobile of protuberance 400 is restricted, and on the one hand, prevents that first bar 4 from moving up along with second bar 11 always and make first bar 4 lose function with on-off element 9; On the other hand, because first bar 4 is limited, on continuing, moves by second bar 11, slide relative takes place between first bar 4 and second bar 11, form negative pressure in the space (b place) of winning between the bar 4 and second bar 11 thereby make, and the content that liquid outlet goes out is withdrawn automatically, avoid content to reveal.

The principle of work of the vacuum pump of present embodiment is as follows:

Pressing button 1, axle 5, second bar 11, first bar 4 and on-off element 9 move vertically downward, third channel 14 and entrance hole 20 are closed, continue to press down, slide relative takes place between second bar 11 and the piston 7 (because the top and bottom of the excircle of piston 7 all bend outwards, and its diameter is greater than 2 interior diameter of housing, thereby the excircle of piston 7 with respect to the friction force of housing 2 greater than the inner periphery of piston 7 friction force with respect to second bar 11), second channel 13 is opened, again to pressing down, content in the vacuum chamber is stressed, thereby from discharge orifice 10 ejections.When being pressed into nadir, the content of specified quantitative is ejected, the meaningful thing remnants of liquid outlet this moment.

After pressure is removed, axle 5, second bar 11, first bar 4 and on-off element 9 vertically move up under the effect of the restoring force of spring 8, third channel 14 and entrance hole 20 are opened, between second bar 11 and the piston 7 slide relative takes place, second channel 13 is closed, and continues upwards, produce negative pressure in the vacuum chamber, content in the container is inhaled in the housing 2 from entrance hole 20, thereby has stored the content of specified quantitative in the pump again, for using next time.In addition, in the process that above-mentioned parts move up, first bar 4 is owing to be subjected to the restriction of the projection 21 of housing 2 inwalls, stop to move up, thereby slide relative takes place in second bar 11 and first bar 4, make to form negative pressure in the space (b) between second bar 11 and first bar 4, and the content that liquid outlet goes out is withdrawn automatically, avoid content to reveal.

More than the utility model has been done detailed description, but the utility model is not limited to the above embodiments.All equivalences of doing according to spirit of the present utility model change or modify, and all should be encompassed in the protection domain of the present utility model.

Claims

1. vacuum pump comprises:

Button (1), it has discharge orifice (10);

Housing (2), it constitutes the outward appearance of pump;

Lid (3), it engages with the outside face on described housing (2) top by housing cap (6), so that described housing (2) to be installed in container;

Axle (5), it is along the inside face vertical shifting of described housing cap (6), and described button (1) is installed in the upper end of axle (5);

Housing cap (6) is used for guiding the vertical shifting of described axle (5), also is used for described housing (2) is connected to described covering (3);

Piston (7), it is along the inwall vertical shifting of described housing (2);

Spring (8), it is arranged between described button (1) and the housing cap (6), provides restoring force to give described axle (5) in the pump pressure process;

On-off element (9), it is positioned at the lower end of the inner space of described housing (2), with in the pump pressure process, open and close in described housing (2) lower end entrance hole (20) and

First bar (4), it moves in the vertical direction, and in its bottom described on-off element (9) is set,

It is characterized in that: described axle (5) has the first passage (12) that is connected with the discharge orifice (10) of described button (1), described vacuum pump also comprises and being arranged in the described axle (5), axially extended second bar (11) along described axle (5), described second bar (11) is mounted slidably along the outside face of described first bar (4), the bottom of described second bar (11) have be formed on the side towards exterior radial projection (110), form the second channel (13) that can open and close between described piston (7) and the described radial projection (110), described second channel (13) is connected with the lower end of described first passage (12).

2. vacuum pump according to claim 1 is characterized in that: described first bar (4) has the bottom (40) of hollow, and described on-off element (9) is connected on the inside face of hollow of bottom (40) of described first bar (4).

3. vacuum pump according to claim 1 is characterized in that: the inside face of described second bar (11) cooperates with the intimate of described first bar (4).

4. vacuum pump according to claim 3, it is characterized in that: the bottom (40) of described first bar (4) is along the inwall vertical shifting of the bottom of described housing (2), and is provided with mobile stop gear between the bottom of the bottom of described housing (2) and described first bar (4).

5. vacuum pump according to claim 4 is characterized in that: the bottom of described first bar (4) is distributed with a plurality of outstanding described first bar (4) surfaces and crooked protuberance (400) up along its circumferencial direction.

6. according to claim 4 or 5 described vacuum pumps, it is characterized in that: described mobile stop gear comprises the outstanding projection (21) that is formed on described housing (2) bottom inside face.

7. according to each described vacuum pump in the claim 1 to 5, it is characterized in that: be formed with the third channel (14) that can open and close between the bottom of described first bar (4) and the described housing (2).

8. vacuum pump according to claim 7 is characterized in that: the taper that the lower end of described first bar (4) diminishes gradually for diameter from top to bottom.