CN2588074Y

CN2588074Y - Hand driven negative pressure pump

Info

Publication number: CN2588074Y
Application number: CN 02289411
Authority: CN
Inventors: 吴安全; 黄世贤; 吴国宝
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-11-28
Filing date: 2002-11-28
Publication date: 2003-11-26
Anticipated expiration: 2012-11-28

Abstract

The utility model relates to a hand-driven negative pressure pump, which can prevent air in a sucking barrel from returning into a vacuum apparatus when a piston is recovered, and make a pull handle more stable in the process of repeatedly moving, and the utility model comprises the sucking barrel, a grip, the pull handle, the piston and an expanding spring. The utility model is characterized in that the front end of the sucking barrel is provided with a screw bolt which is provided with a central through hole and a plurality of small air holes circularly arranged around the central through hole; the screw bolt can also be in screw connection with a screw sleeve of a pipe joint, a valve and a leakproof ring need to be arranged between the pipe joint and the screw bolt, and secondly, the staircase-shaped through hole in the front of the grip is embedded with a clamping ring which is matched with a pull rod of the pull handle so that the pull handle can be more stably moved.

Description

Manual negative pressure pump

Technical field

The utility model provides a kind of manual negative pressure pump, and it can cooperate mamaplasty device, cupping device, vacuum suction tube and other vacuum material of physics medical use to use, and applicability is very extensive.

Background technique

Solid combination and exploded view that conventional manual negative pressure pump 10 discloses as Fig. 1, Fig. 2, it is configured to: a suction tube 1 is long tubular; One shaped as frame handle 2 is combined in suction tube 1 rear end; One pull handle 3 is that a cross-tie 31 shuttles back and forth in suction tube 1, and the T shape pull handle 32 that links after the pull bar 31 then is positioned at shaped as frame handle 2; One piston 4 is located in the suction tube 1 and is fixed on the front end of pull bar 31; And a spreader spring 5, string on pull bar 31 and front end head on piston 4 and the rear end heads on shaped as frame handle 2.

The front end of aforementioned suction tube 1 is a valve 11, and the rear end then is screwed in female swivel nut 23 before handle 2 with external screw thread 12; And pull bar 31 outer rims of pull handle 3 are provided with the guiding element 33 of several protrusion, and this pull bar 31 and guiding element 33 pass perforation 21 of the handle corresponding with it 2 antethecas and guide channel 22 respectively; Pull bar 31 front ends are spirally connected fixing with the screw 44 of disjunctor screw rod 34 and piston 4 again, this piston 4 is made up of the preceding guiding element 41 of ring-type, the back guiding element 42 of ring-type and the trapezoidal rubber suction cups 43 that is positioned between forward and backward guiding element, wherein, back guiding element 42 is gone back circular row and is provided with a plurality of spileholes 421, have rubber suction cups 43 then with suction tube 1 inwall close fit.

Its course of action can be joined Fig. 3, shown in Figure 4, when suction tube 1 is air-breathing such as Fig. 3 disclose by pull handle 3 post-tensionings piston 4 moved backward owing to can cause negative pressure in the suction tube 1, the air in the vacuum equipment can be sucked in the suction tube 1; And originally the position when piston 4 is mobile backward, oppressed and the perforation 21 and the guide channel 22 of rearward end are discharged outward in suction tube 1 and the air behind piston 4.Otherwise as shown in Figure 4, when mobile forward, piston 4 also moves forward by pull handle 3, and at this moment the air before the piston 4 are oppressed and that gas is forced to is mobile backward by the spilehole 421 of rubber suction cups 43 (can join shown in Fig. 4 A) and back guiding element 42 backwards; When suction tube 1 carries out getter action again, be subjected to compressing backwards in the moving process at piston 4 and discharge in just by perforation 21 and guide channel 22.

The problem that above-mentioned habit formula manual negative pressure pump exists is:

(1) when pull handle 3 and piston 4 are together mobile forward, after being forced to, can move the air in the suction tube 1 by sucker 43 and back guiding element spilehole 421 backward, and this is the theoretic practice; In fact, also can discharge after the air of piston 4 is forced to, and enter in the vacuum gas equipment, because valve 11 does not have the check valve structure, so, can partly oppositely flow back in the vacuum material originally by the air of suction tube 1 sucking-off toward valve 11.

(2) perforation 21 before the handle 2 and guide channel 22 shuttles back and forth as pull bar 31 respectively and guide guiding element 33 usefulness, simultaneously also as the rear end relief opening of suction tube 1, the wall thickness width that perforation 21 and guide channel 22 are set is too thin, make that moving of pull bar 31 and guiding element 33 is extremely unstable, very easily have off-centre to rock or pause and transition in rhythm or melody when moving back and forth in pull handle 3 front and back.

(3) front end of handle 2 is female swivel nut 21, so the rear end of suction tube 1 must be external screw thread 12, when both in conjunction with the time, be by external screw thread 12 be screwed into screw togather in the female swivel nut 23 fixing, relatively be difficult for before screwing togather like this is configured in and screws togather cooperating, and spiral action also comparatively has some setbacks.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned defective, provides a kind of and can prevent air circulation in the suction tube when piston reduces to the vacuum equipment, and make pull handle more stable manual negative pressure pump in moving process repeatedly.

Manual negative pressure pump of the present utility model comprises:

One suction tube is long tubular; One handle is combined in the suction tube rear end; One pull handle is that a cross-tie shuttles back and forth in inflator, the pull handle of the back binding of pull bar then the position in the shaped as frame handle; One piston is located in the suction tube and is fixed on the front end of pull bar; And a spreader spring, string on pull bar and front end head on piston and the rear end heads on the shaped as frame handle; Have externally threaded double-screw bolt in the setting of suction tube front end, this double-screw bolt has central perforation and a plurality of spileholes of circular row around central perforation; Double-screw bolt can screw togather with the swivel nut of pipe joint again, and between pipe joint and double-screw bolt valve and seal ring must be set; Valve is that a rubber sheet gasket and two ends have projection again, but in the central perforation of another end projection insertion tube joint, and hold projection can insert in the central perforation of double-screw bolt in addition.

Above-mentioned manual negative pressure pump, wall aperture before the handle is the cascade perforation, the peritreme outer wall is provided with the fixture block that several isogonisms protrude, other has a stepped snap ring chimeric with perforation, and the set chase of snap ring outer rim can corresponding engaging with aforementioned fixture block, and the set chase of snap ring peritreme can import for the set protrusion guiding element in aforementioned pull bar surface and cooperate again.

Above-mentioned manual negative pressure pump forms bulge loop outside the aperture of the central perforation of double-screw bolt and pipe joint, and suitable apart distance is to match with the pad of valve between two bulge loops.

Before the above-mentioned manual negative pressure pump, handle is public swivel nut, and the suction tube end is a female snail cover, and the female snail cover of suction tube can be easy to be screwed on outside the public swivel nut of handle.

Effect of the present utility model:

(1) air in the suction tube is when piston is mobile forward, and valve pressurized and make the central perforation sealing of pad with pipe joint forces air can only cross the sucker of piston and flow toward the suction tube rear end, avoids being back in the vacuum equipment.

(2) after the perforation before the handle is embedded snap ring,, and make pull handle not produce in moving back and forth that off-centre is rocked and pause and transition in rhythm or melody by the matching relationship of snap ring and pull handle.

(3) female snail cover of suction tube is sleeved on the public swivel nut of handle easily, and the rotation suction tube gets final product when turn, need not rotate handle, so comparatively convenient in the assembling.

Description of drawings

Fig. 1: the three-dimensional combination figure of practising the formula manual negative pressure pump.

Fig. 2: the three-dimensional exploded view of practising the formula manual negative pressure pump.

Fig. 3: the action schematic representation of practising the formula manual negative pressure pump.

Fig. 4: the action schematic representation of practising the formula manual negative pressure pump.

Fig. 4 A: be the A portion piston enlarged diagram of Fig. 4.

Fig. 5: the three-dimensional combination figure of the utility model manual negative pressure pump.

Fig. 6: the three-dimensional exploded view of the utility model manual negative pressure pump.

Fig. 7: the action schematic representation of the utility model manual negative pressure pump.

Fig. 7 A: be the A portion valve enlarged diagram of Fig. 7.

Fig. 7 B: be the B portion piston enlarged diagram of Fig. 7.

Fig. 7 C: be the C portion snap ring enlarged diagram of Fig. 7.

Fig. 8: the action schematic representation of the utility model manual negative pressure pump.

Fig. 8 A: be the A portion valve enlarged diagram of Fig. 8.

Fig. 8 B: be the B portion piston enlarged diagram of Fig. 8.

Fig. 9: the utility model manual negative pressure pump cooperates figure with the cup of mamaplasty device.

Figure 10: the utility model manual negative pressure pump cooperates figure with the jar cup that traditional Chinese medical science cup is used.

Figure 11: the utility model manual negative pressure pump and male erectile cooperate figure with the cup of suction tube.

Embodiment

Following foundation embodiment shown in the drawings describes in detail as the back:

As Fig. 5, shown in Figure 6, three-dimensional combination figure of the present utility model and exploded view.The main structure that discloses the utility model manual negative pressure pump 20 among the figure is similar to the habit formula, is respectively suction tube 1, handle 2, pull handle 3, piston 4 and spreader spring 5; It is characterized in that: the valve of suction tube 1 front end changes into has externally threaded double-screw bolt 12, and this double-screw bolt has central perforation 121 and a plurality of spileholes 122 of circular row around central perforation 121; Double-screw bolt 12 can screw togather with the swivel nut 61 of pipe joint 6 again, and between pipe joint 6 and double-screw bolt 12 valve 7 and seal ring 8 must be set; In addition, change the female swivel nuts before the shaped as frame handle 2 into public swivel nut 24, and what screw togather mutually with public swivel nut 24 is the female snail cover 13 of suction tube 1 end; Moreover the wall aperture before the handle 2 changes cascade perforation 25 into, is provided with the fixture block 26 that several isogonisms protrude in the peritreme outer wall again, and this perforation 25 and position are in public swivel nut 24 central interior; In addition, set up a stepped snap ring 9 and perforation 25 chimeric (ginseng Fig. 7 together), and several isogonism chases 91 and aforementioned fixture block 26 corresponding engagings that snap ring 9 outer rims are set, set protrusion guiding element 33 imports on the set aforementioned pull bar 31 of 92 confessions of chase of snap ring 9 peritremes again.

Aforementioned valve 7 is that a rubber sheet gasket 71 and two ends have

symmetrical projection

72,73, can make assembling more convenient in assembling the time can be easy to the central perforation 121 of the central perforation 62 of insertion tube joint 6 and double-screw bolt 12 by

projection

72,73; When being contacted with pad 71, two central perforations 62,121 can reach splendid leak preventing effect again, can outside the aperture of two central perforations, form bulge loop 63,123 (ginseng Fig. 7 A together), 63,123 of two bulge loops keep suitable spacing, when contacting with arbitrary bulge loop 63,123, pad 71 can produce splendid sealing effect, if there is not the existence of bulge loop, then pad 71 can contact with the outer wall generation face of central perforation 63,123, and leak preventing effect can variation.

Moreover, the thickness of aforementioned stepped snap ring 9 is greater than the pore wall thickness (ginseng Fig. 7 C together) of stepped perforation 25, so can increase with the area of contact of pull bar 31 and protrusion guiding element 33, thus, do not rock or move the middle pause and transition in rhythm or melody that produces with regard to not having by pull bar 31 off-centre when telescopic moving for pull handle 3; Snap ring 9 is subjected to cooperating of the compressing of spring 5 and chase 91 and fixture block 26 again, can make snap ring 9 avoid producing unusual fluctuation.Again, the effect that screws togather with the public swivel nut 24 before the female snail cover 13 of suction tube 1 and the handle 2 can be good than habit formula, because the female snail cover 13 of suction tube 1 is easier to be sleeved on for the assembler the public swivel nut 24 of handle 2, and rotates suction tube 1 get final product when turn, need not rotate handle 2, so comparatively convenient in the assembling.

Action of the present utility model such as Fig. 7, shown in Figure 8, Fig. 7 disclose after pull handle 3 makes piston 4 together move backward, can cause negative pressure in the suction tube 1, so the air in the vacuum equipment is sucked in suction tube 1; At this moment valve 7 is subjected to the sucking action of suction tube 1, its pad 71 can fit in before the bulge loop 123 and with central perforation 121 sealings, make the central perforation 62 of pipe joint 6 be open state, so air flows in the suction tube 1 through the spilehole 122 of double-screw bolt 12 by central perforation 62 again; Originally be positioned at suction tube 1 and the air behind piston 4 again, be subjected to piston 4 moving influence and the perforation 21 and guide channel 22 discharges of rearward end backward; When piston 4 moves, the external diameter of rubber suction cups 43 and the close involution of suction tube 1 inwall (can join Fig. 7 B).Otherwise, when making piston 4 together mobile forward by pull handle 3 as shown in Figure 8, at this moment in the inflator 1 and the air before the piston 4 be subjected to compressing and can squeeze forward, make valve 7 be subjected to the scavenging action of suction tube 1 and make pad 71 fit in (shown in Fig. 8 A) before the bulge loop 63, air can't be entered in the central perforation 62, so can't go in the vacuum equipment, because the air before the piston 4 can't be discharged, as a result compressing rubber sucker 43 (shown in Fig. 8 B) backwards, make sucker 43 be forced to diameter reduction, make air pass through the spilehole 421 of sucker 43 and back guiding element 42 and mobile backward; When suction tube 1 carries out getter action once again, be subjected to oppressing in the moving process backwards just at piston 4 and discharge in can be by the perforation 21 of rear end and guide channel 22.Therefore the utility model is after setting up pipe joint 6, can make piston 4 in the suction tube 1 when backhaul, avoids the air reverse reflux to go in the vacuum equipment.

To be respectively the utility model manual negative pressure pump 20 be connected to take over 30 jar cups of using with mamaplasty device cup 40, traditional Chinese medical science cup 50 and the suction tube 60 that male erectile is used for Fig. 9, Figure 10, Figure 11, by individual one-handed operation negative pressure pump pump apparatus 20, just can reach splendid air-breathing and degassing function; In addition, also be applicable on other vacuum equipment and implement.

Claims

1, a kind of manual negative pressure pump, it comprises:

One suction tube is long tubular;

One handle is combined in the suction tube rear end;

One pull handle is that a cross-tie shuttles back and forth in inflator, the pull handle of the back binding of pull bar then the position in the shaped as frame handle;

One piston is located in the suction tube and is fixed on the front end of pull bar; And

One spreader spring, string on pull bar and front end head on piston and the rear end heads on the shaped as frame handle; It is characterized in that:

The suction tube front end is one to have externally threaded double-screw bolt, and this double-screw bolt has central perforation and a plurality of spileholes of circular row around central perforation; Double-screw bolt can screw togather with the swivel nut of pipe joint again, and between pipe joint and double-screw bolt valve and seal ring is set; Aforementioned valve is that a rubber sheet gasket and two ends have projection, and two projections can be distinguished in the central perforation of the central perforation of insertion tube joint and double-screw bolt.

2, want 1 described manual negative pressure pump as right, it is characterized in that: the wall aperture before the handle is the cascade perforation, the peritreme outer wall is provided with the fixture block that several isogonisms protrude, other has a stepped snap ring chimeric with perforation, and the chase that the snap ring outer rim is had can corresponding engaging with aforementioned fixture block, and the set chase of snap ring peritreme can import for the set protrusion guiding element in aforementioned pull bar surface and cooperate again.

3, manual negative pressure pump as claimed in claim 1 is characterized in that: can form bulge loop outside the aperture of the central perforation of double-screw bolt and pipe joint, suitable apart distance is to match with the pad of valve between two bulge loops.

4, manual negative pressure pump as claimed in claim 1 is characterized in that: be public swivel nut before the handle, the suction tube end is a female snail cover, and the female snail cover of suction tube can be easy to be screwed on outside the public swivel nut of handle.