CN208683362U - A kind of glass dewar - Google Patents

Abstract

The utility model discloses a kind of glass dewars, including interior bottle, outer blank, lower fixing sleeve, upper fixing sleeve, outer cover, pressing piece and Pressing pump, interior bottle lower inner wall interference is equipped with lower piston, interior bottle bottom side sets through-hole, interior bottle upper end sets pressure contact portion, pressure contact portion apical margin is outwardly formed outer engaging portion, outer blank top is equipped with bottle holder, bottle holder upper end is equipped with interior engaging portion, it is fastened and connected in interior bottle insertion outer blank and by outer engaging portion and interior engaging portion, bottle holder outer wall is equipped with snaggletooth screw thread, outer cover lower inner wall is equipped with internal screw thread, outer blank is spirally connected with outer cover by snaggletooth screw thread and screw-internal thread fit, interior engaging portion is equipped with fracture portion relative to the gap of snaggletooth screw thread, lower fixing sleeve is crimped on pressure contact portion, fixing sleeve is snapped in outer cover, upper fixing sleeve lower part and lower fixing sleeve snapping, Pressing pump is fastened between lower fixing sleeve and upper fixing sleeve , pressing piece central lower buckles into Pressing pump top.The utility model is designed reasonably, good appearance, liquid is smooth out, and practicability is good.

Description

A kind of glass dewar

Technical field

The utility model relates to Packaging Bottle fields, more particularly, to a kind of glass dewar.

Background technique

Dewar bottle refers to a kind of container that gas and ambient temperature can be made to completely cut off or the container for completely cutting off external bacterium, it is pushed away The latest development trend for having complied with product packaging out, allows product not ingress of air and bacterium in validity period, avoids connecing with air Touching makes product aoxidize and go bad, and keeps the freshness of product for a long time.Dewar bottle general at present exists in use The problem of liquid has some setbacks, in addition bottle is made of plastic material, and texture is not good enough, and added value of product is low, it is therefore necessary to Dewar bottle It improves.

Utility model content

The purpose of the utility model is to overcome above-mentioned the deficiencies in the prior art, provide a kind of glass dewar, structure Rationally, good appearance, liquid is smooth out, and practicability is good for design.

To achieve the goals above, the utility model adopts the following technical solution:

A kind of glass dewar, including interior bottle, outer blank, lower fixing sleeve, upper fixing sleeve, outer cover, pressing piece and Pressing pump, institute Interior bottle lower inner wall interference is stated equipped with lower piston, the interior bottle bottom side is equipped with through-hole, and the interior bottle upper end is equipped with pressure contact portion, The pressure contact portion apical margin extends outward to form outer engaging portion, and the outer blank top is equipped with the bottle holder of reduced diameter, on the bottle holder End is equipped with interior engaging portion, and the interior bottle insertion outer blank is interior and is fastened and connected by outer engaging portion and interior engaging portion, outside the bottle holder Wall is equipped with snaggletooth screw thread, and the outer cover lower inner wall is equipped with internal screw thread, and the outer blank and outer cover pass through snaggletooth screw thread and interior It is threadedly engaged and is spirally connected, the interior engaging portion is equipped with fracture portion relative to the gap of snaggletooth screw thread, and the interior bottle is located at lower piston Under space be in communication with the outside by the gap of through-hole, fracture portion and snaggletooth screw thread, the lower fixing sleeve is crimped on pressure contact portion On, fixing sleeve, the lower part of fixed set and lower fixing sleeve snapping are snapped in the outer cover, the Pressing pump is worn respectively It crosses down fixing sleeve and upper fixing sleeve center and is engaged between lower fixing sleeve and upper fixing sleeve, the pressing piece central lower button Enter Pressing pump top and by pressing piece the internal bottle of Pressing pump can be vacuumized by lower.

The interior bottle is made of PP, PE or ABS material, and the outer blank is made of glass material.

The Nei Ping bottom centre is equipped with the abutting block to raise upward, and the lower piston lower part moves downward abutting and abuts Block.

Fixed set include the interconnecting piece of central opening, upwardly extended by interconnecting piece outer end the outer sleeve formed and by The upper retaining ring being downwardly extending in the middle part of connection lower surface, outer sleeve outer wall top are circumferentially evenly distributed with the first locking teeth, institute It states outer sleeve outer wall lower part to outwardly protrude to form outer bulge loop, the upper retaining ring inner wall is recessed inwardly to form groove ring.

The lower fixing sleeve includes flushing portion, upwardly extending the lower button formed by flushing upper surface in the middle part of portion for central opening Ring and the abutment ring formed is upwardly extended by flushing portion inner edge, the lower retaining ring outer wall, which outwardly protrudes to be formed, buckles into the convex of groove ring Ring gear.

Interior retaining ring is equipped in the middle part of the outer cover, the internal buckle collar-shaped upper inside wall is equipped with the second locking teeth, passes through second The cooperation snapping of locking teeth and the first locking teeth realizes that outer cover and the circumferential of upper fixed inner room limit, the internal buckle collar-shaped inner wall Lower part is equipped with interior concave ring, and the limit up and down of outer cover and upper fixed inner room is realized by the snapping of interior concave ring and outer bulge loop.

The Pressing pump includes piston bush, penetrates the hollow outer piston bar in piston bush and snap onto outer piston bar inside The hollow inner piston rod of the heart, interference is equipped with upper piston, the piston bush between inner piston rod lower part outer wall and piston bush inner wall Including the large diameter portion and small diameter portion connected by limiting section, the limiting section internal diameter is respectively less than in large-diameter portion internal diameter and small diameter portion Diameter, the large-diameter portion top are integrally formed the abutting part for being connected with and being fastened between on the inside of abutment ring and interconnecting piece, the major diameter Portion's upper inside wall is recessed to form limiting slot, and the small diameter portion bottom is downwardly extending guide ring, the small diameter portion bottom centre Equipped with cross-hole, overflow sleeve is installed in the small diameter portion, the overflow sleeve includes the ring washer and position positioned at lower central Annular casing in outside, the annular casing upper surface abut limiting section, and annular casing lower end surface abuts small diameter portion bottom, the planchet Piece fitting capping cross-hole, the ring washer outer rim are circumferentially uniformly connected to the connection sheet of annular casing inner wall lower, adjacent company Diversion trench is formed between contact pin.

The outer piston bar includes upper sleeved rod portion and the lower sleeved rod portion that is downwardly extending by upper sleeved rod portion bottom, it is described on Sleeved rod portion upper end extends outward to form epitaxy part, and the epitaxy part, which moves downward, abuts abutting part inside upper surface, the extension Crimp spring between portion and limiting slot, the upper sleeved rod portion inner wall depression form piston rod groove ring, inside the lower sleeved rod portion Hollow and its upper inside wall is equipped with internal buckle ring.

The inner piston rod includes upper pole part and the crotch for resisting upper piston that is formed by the outward bending of upper pole part bottom end Portion, upper pole part outer wall top are equipped with the outer tooth ring that can be buckled into internal buckle ring.

The pressing piece include positioned at pressing piece center hollow connecting rod and the guide ring on the outside of pressing piece, it is described Pressing piece top is equipped with the spray nozzle part being connected to connecting rod, and the outer cover top is equipped with the opening portion that spray nozzle part can be made to pass through, institute It states connecting rod lower part outer wall and is equipped with the connecting rod double wedge ring that cooperation buckles into piston rod groove ring, the guide ring can be along interior retaining ring Annular outer wall oscilaltion.

The beneficial effects of the utility model are: the double-deck Bottle structure of use, when pressing pressing piece down, outside air can be by outer The fracture portion of snaggletooth screw thread, outer blank bottle mouth position on bottle, the through-hole in interior bottom of bottle portion enter in the space of lower piston lower part, so that under Normal atmosphere (An) is kept in piston lower portion space, is conducive to further lower piston be pushed to move upwards, so that liquid is more out It is smooth；Outer blank is made of glass material, and cost is low, economical and practical, while improving product texture；Each component of whole device Between connect it is ingenious, design rationally, assemble it is convenient, be conducive to large-scale production.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the enlarged drawing in Fig. 1 at A；

Fig. 3 is the enlarged drawing in Fig. 1 at B；

Fig. 4 is the enlarged drawing in Fig. 1 at C；

Fig. 5 is the enlarged drawing in Fig. 1 at D；

Fig. 6 is the stereoscopic schematic diagram of the outer blank of the utility model；

Fig. 7 is the stereoscopic schematic diagram of the upper fixing sleeve of the utility model；

Fig. 8 is the structural schematic diagram of the outer cover of the utility model；

Fig. 9 is the top view of the overflow sleeve of the utility model.

In figure: interior bottle 1, pressure contact portion 11, outer engaging portion 12, through-hole 13, abut block 14, lower piston 15, outer blank 2, bottle holder 21, Snaggletooth screw thread 22, interior engaging portion 23, fracture portion 24, lower fixing sleeve 3, flush portion 31, lower retaining ring 32, double wedge ring 33, abutment ring 34, It is upper fixing sleeve 4, interconnecting piece 41, outer sleeve 42, the first locking teeth 43, outer bulge loop 44, upper retaining ring 45, groove ring 46, outer cover 5, interior Screw thread 51, interior retaining ring 52, the second locking teeth 53, interior concave ring 54, opening portion 55, pressing piece 6, connecting rod 61, connecting rod double wedge ring 62, spray nozzle part 63, guide ring 64, Pressing pump 7, piston bush 71, abutting part 72, limiting slot 73, large-diameter portion 74, limiting section 75, small Diameter portion 76, guide ring 77, overflow sleeve 78, ring washer 781, annular casing 782, connection sheet 783, diversion trench 784, cross-hole 79, Outer piston bar 8, epitaxy part 81, upper sleeved rod portion 82, piston rod groove ring 83, lower sleeved rod portion 84, internal buckle ring 85, spring 86, interior work Stopper rod 9, upper pole part 91, outer tooth ring 92, hook part 93, upper piston 94.

Specific embodiment

The utility model is further described with reference to the accompanying drawings and detailed description:

As shown in FIG. 1 to FIG. 9, a kind of glass dewar, including it is interior bottle 1, outer blank 2, lower fixing sleeve 3, upper fixing sleeve 4, outer Lid 5, pressing piece 6 and Pressing pump 7, wherein the interior bottle 1 is made of PP, PE or ABS material, and the outer blank 2 uses glass material Matter is made, not only aesthetic in appearance, can promote texture, and cost is low, economical and practical.

The 1 lower inner wall interference of interior bottle is equipped with lower piston 15, and interior 1 bottom side of bottle is equipped with through-hole 13, described interior 1 upper end of bottle is equipped with pressure contact portion 11, and 11 apical margin of pressure contact portion extends outward to form outer engaging portion 12, and 2 top of outer blank is equipped with The bottle holder 21 of reduced diameter, 21 upper end of bottle holder are equipped with interior engaging portion 23, and the interior bottle 1 is embedded in outer blank 2 and passes through outward buckle Socket part 12 is fastened and connected with interior engaging portion 23, and 21 outer wall of bottle holder is equipped with snaggletooth screw thread 22, in 5 lower inner wall of outer cover Equipped with internal screw thread 51, the outer blank 2 is spirally connected with outer cover 5 by snaggletooth screw thread 22 and the cooperation of internal screw thread 51；The interior engaging portion 23 Relative to snaggletooth screw thread 22 gap be equipped with fracture portion 24, the interior bottle 1 be located at the space under lower piston 15 pass through through-hole 13, The gap of fracture portion 24 and snaggletooth screw thread 22 is in communication with the outside；After glass dewar assembles, lower pressing piece 6 of pressing is to interior bottle When 1 top vacuumizes, interior 1 upper space air pressure of bottle reduces, and lower piston 15 up moves, and outside air passes through snaggletooth at the same time The gap of screw thread 22 enters, and enters between interior bottle 1 and outer blank 2 using fracture portion 24, enters finally by through-hole 13 and is located at Make to maintain normal atmosphere (An) in the space in 1 space of interior bottle under lower piston 15, forms pressure between about 15 side space of lower piston Strong poor further promotion lower piston 15 moves upwards.

1 bottom centre of Nei Ping is equipped with the abutting block 14 to raise upward, and 15 lower part of lower piston moves downward abutting Block 14 is abutted, when lower piston 15 abuts block 14, forms the sky that can maintain normal pressure between 1 bottom of lower piston 15 and interior bottle Between, ensure the smooth rising of lower piston 15.

The lower fixing sleeve 3 is crimped on pressure contact portion 11, the lower fixing sleeve 3 include central opening flush portion 31, by 31 middle part upper surface of portion is flushed to upwardly extend the lower retaining ring 32 to be formed and upwardly extend the abutment ring formed by flushing 31 inner edge of portion 34, the 31 outer end lower surface of portion that flushes is bonded with 11 upper base surface of pressure contact portion.

The interconnecting piece 41 of fixed set 4 including central opening upwardly extends the housing formed by 41 outer end of interconnecting piece Ring 42 and the upper retaining ring 45 by being downwardly extending in the middle part of 41 lower surface of interconnecting piece.

It is snapped with fixing sleeve 4 in the outer cover 5, specifically, the 42 outer wall top of outer sleeve is circumferentially evenly distributed with the first lock Fixed tooth 43 is equipped with interior retaining ring 52 in the middle part of the outer cover 5, and interior 52 top opening of retaining ring can be such that Pressing pump 7 passes through, the interior retaining ring 52 Annular inner wall top is equipped with the second locking teeth 53, realizes outer cover by the cooperation snapping of the second locking teeth 53 and the first locking teeth 43 Circumferential limit between 5 and upper fixing sleeve 4, the interior 52 annular inner wall lower part of retaining ring are equipped with interior concave ring 54, outside the outer sleeve 42 Wall lower part outwardly protrudes to form outer bulge loop 44, is realized between outer cover 5 and upper fixing sleeve 4 by the snapping of interior concave ring 54 and outer bulge loop 44 Limit up and down.

The lower part of fixed set 4 and lower 3 snapping of fixing sleeve, specifically, upper 45 inner wall of retaining ring is recessed inwardly shape At groove ring 46, lower 32 outer wall of retaining ring outwardly protrudes to form the double wedge ring 33 for buckling into groove ring 46.

The Pressing pump 7 is each passed through lower fixing sleeve 3 and 4 center of upper fixing sleeve and is engaged in lower fixing sleeve 3 and upper solid Surely between set 4,6 central lower of pressing piece buckles into 7 top of Pressing pump and Pressing pump 7 can be made right by pressing piece 6 by lower Interior bottle 1 is vacuumized.

The Pressing pump 7 includes piston bush 71, penetrates the hollow outer piston bar 8 in piston bush 71 and snap onto outer piston bar The hollow inner piston rod 9 of 8 inside centers, interference is equipped with upper piston between the 9 lower part outer wall of inner piston rod and 71 inner wall of piston bush 94, upper piston 94 can move up and down in large-diameter portion 74 with inner piston rod 9, be movable to abut limiting section 75 downwards.

The piston bush 71 includes the large-diameter portion 74 and small diameter portion 76 connected by limiting section 75,75 internal diameter of limiting section Respectively less than 76 internal diameter of 74 internal diameter of large-diameter portion and small diameter portion, 74 top of large-diameter portion, which is integrally formed to be connected with, is fastened on abutment ring 34 With the abutting part 72 between 41 inside of interconnecting piece, specifically, 72 outside upper horizontal surface of abutting part is fitted and connected under 41 inside of portion Surface, 72 upper, annular outer wall of abutting part are fitted and connected 41 interior annular inner wall of portion, and 72 lower surface of abutting part is bonded abutment ring 34 Upper surface, 34 annular inner wall of abutment ring are bonded 74 outer wall of large-diameter portion；74 upper inside wall of large-diameter portion is recessed to form limiting slot 73, 76 bottom of small diameter portion is downwardly extending guide ring 77, and guide ring 77 is for carrying out convergence drainage to the liquid drunk up； 76 bottom centre of small diameter portion is equipped with cross-hole 79, is installed with overflow sleeve 78, the overflow sleeve 78 in the small diameter portion 76 Including being located at the ring washer 781 of lower central and positioned at the annular casing 782 in outside, 782 upper surface of annular casing abuts limit Portion 75,782 lower end surface of annular casing abut 76 bottom of small diameter portion, the fitting of the ring washer 781 capping cross-hole 79, the planchet 781 outer rim of piece is circumferentially uniformly connected to the connection sheet 783 of 782 inner wall lower of annular casing, forms diversion trench between adjacent tabs 783 784, the connection sheet 783 in the utility model is three, and overflow sleeve 78 is made of plastic material, has elastic deformation ability.

The outer piston bar 8 includes upper sleeved rod portion 82 and the lower sleeved rod portion being downwardly extending by upper 82 bottom of sleeved rod portion 84, upper 82 upper end of sleeved rod portion extends outward to form epitaxy part 81, and the epitaxy part 81, which moves downward, to abut in abutting part 72 Side upper surface, crimp spring 86 between the epitaxy part 81 and limiting slot 73 press pressing piece 6,86 lower motion of spring to limit When at the slot 73 of position, 86 lower part of spring is resisted and cannot continue to move down, by pressing piece 6 under continuing at this time, drives outer piston Bar 8 continues to move downward and compress spring 86.

The inner piston rod 9 includes upper pole part 91 and resists upper piston 94 by what 91 bottom end outward bending of upper pole part was formed Hook part 93, lower 84 inner hollow of sleeved rod portion and its upper inside wall are equipped with internal buckle ring 85, on 91 outer wall of upper pole part Portion is equipped with the outer tooth ring 92 that can be buckled into internal buckle ring 85.

The pressing piece 6 includes the guide ring positioned at the hollow connecting rod 61 at 6 center of pressing piece and positioned at 6 outside of pressing piece 64, it is sequentially communicated between the connecting rod 61, outer piston bar 8 and inner piston rod 9；6 top of pressing piece is equipped with and connecting rod 61 The spray nozzle part 63 of connection, 5 top of outer cover are equipped with the opening portion 55 that spray nozzle part 63 can be made to pass through, upper 82 inner wall of sleeved rod portion Concave shape is equipped with the connecting rod that cooperation buckles into piston rod groove ring 83 at piston rod groove ring 83, the 61 lower part outer wall of connecting rod Double wedge ring 62, the guide ring 64 can be along interior 52 annular outer wall oscilaltions of retaining ring；May be used also outside the pressing piece 6 of the utility model It is arranged an outer cover, is shielded to pressing piece 6, but whether is arranged outer cover all and will not influence the use of pressing piece 6, therefore be The no outer cover that is arranged also is within the protection scope of the utility model.

The working principle of the utility model is: outer piston bar 8 drives inner piston rod 9 downwardly together when pressing pressing piece 6 instantly Movement, then the lower end surface of outer piston bar 8 resists upper piston 94 and upper piston 94 is driven to move downwardly together, due to ring washer 781 cover cross-holes 79, and the gas in 71 lower space of piston bush passes sequentially through connecting rod 61 and spray nozzle part 63 leaks to outer Boundary；After unclamping pressing, pressing piece 6 gradually resets under the action of spring 86, and outer piston bar 8 drives inner piston rod 9 one at this time It rises and moves upwards, then upper piston 94 is driven to rise together, air pressure becomes smaller in the lower space where upper piston 94, is located at interior bottle Liquid in 1 rise under the action of lower piston 15 and it is upward wash ring washer 781 open, ring washer 781 is in itself bullet at this time Power effect is lower no longer to cover cross-hole 79 upwards, and liquid enters 94 institute of upper piston by cross-hole 79 and from diversion trench 784 Lower space in；Lower again to press pressing piece 6, outer piston bar 8 drives inner piston rod 9 to move downwardly together, so that upper piston The liquid in lower space where 94 enters in inner piston rod 9, and along inside 9 inside of inner piston rod and outer piston bar 8 into Enter into connecting rod 61, finally sprays from spray nozzle part 63, recycle repeatedly.

The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model Within the scope of shield.

Claims (10)

1. a kind of glass dewar, including interior bottle (1), outer blank (2), lower fixing sleeve (3), upper fixing sleeve (4), outer cover (5), pressing Part (6) and Pressing pump (7), it is characterised in that: interior bottle (1) the lower inner wall interference is equipped with lower piston (15), the interior bottle (1) Bottom side is equipped with through-hole (13), and interior bottle (1) upper end is equipped with pressure contact portion (11), and pressure contact portion (11) apical margin extends outwardly Outer engaging portion (12) is formed, outer blank (2) top is equipped with the bottle holder (21) of reduced diameter, and bottle holder (21) upper end is equipped with interior Engaging portion (23), interior bottle (1) insertion outer blank (2) is interior and is fastened and connected by outer engaging portion (12) and interior engaging portion (23), Bottle holder (21) outer wall is equipped with snaggletooth screw thread (22), and outer cover (5) lower inner wall is equipped with internal screw thread (51), described outer Bottle (2) is spirally connected with outer cover (5) by snaggletooth screw thread (22) and internal screw thread (51) cooperation, and the interior engaging portion (23) is relative to snaggletooth The gap of screw thread (22) be equipped with fracture portion (24), the interior bottle (1) be located at the space under lower piston (15) pass through through-hole (13), The gap of fracture portion (24) and snaggletooth screw thread (22) is in communication with the outside, and the lower fixing sleeve (3) is crimped on pressure contact portion (11), It is snapped with fixing sleeve (4) in the outer cover (5), the lower part of fixed set (4) and lower fixing sleeve (3) snapping are described to press Press pump (7) is each passed through lower fixing sleeve (3) and upper fixing sleeve (4) center and is engaged in lower fixing sleeve (3) and upper fixing sleeve (4) Between, pressing piece (6) central lower buckles into Pressing pump (7) top and can make Pressing pump (7) by pressing piece (6) by lower Internal bottle (1) is vacuumized.

2. a kind of glass dewar as described in claim 1, it is characterised in that: the interior bottle (1) uses PP, PE or ABS material It is made, the outer blank (2) is made of glass material.

3. a kind of glass dewar as described in claim 1, it is characterised in that: interior bottle (1) bottom centre is equipped with upward convex The abutting block (14) risen, lower piston (15) lower part move downward abutting and abut block (14).

4. a kind of glass dewar as described in claim 1, it is characterised in that: fixed set (4) includes central opening Interconnecting piece (41), upwardly extended from interconnecting piece (41) outer end the outer sleeve formed (42) and from the middle part of interconnecting piece (41) lower surface to Under the upper retaining ring (45) that extends to form, outer sleeve (42) the outer wall top is circumferentially evenly distributed with the first locking teeth (43), the housing Ring (42) outer wall lower part outwardly protrudes to be formed outer bulge loop (44), and upper retaining ring (45) inner wall is recessed inwardly to form groove ring (46)。

5. a kind of glass dewar as claimed in claim 4, it is characterised in that: the lower fixing sleeve (3) includes central opening Flush portion (31), from flush upper surface in the middle part of portion (31) upwardly extend the lower retaining ring (32) formed and from flush portion (31) inner edge to On the abutment ring (34) that extends to form, lower retaining ring (32) outer wall outwardly protrudes the double wedge ring to be formed and buckle into groove ring (46) (33)。

6. a kind of glass dewar as claimed in claim 4, it is characterised in that: interior retaining ring (52) are equipped in the middle part of the outer cover (5), Interior retaining ring (52) the annular inner wall top is equipped with the second locking teeth (53), passes through the second locking teeth (53) and the first locking teeth (43) cooperation snapping realizes the circumferential limit between outer cover (5) and upper fixing sleeve (4), interior retaining ring (52) the annular inner wall lower part Equipped with interior concave ring (54), realized by the snapping of interior concave ring (54) and outer bulge loop (44) upper between outer cover (5) and upper fixing sleeve (4) Lower limit.

7. a kind of glass dewar as claimed in claim 5, it is characterised in that: the Pressing pump (7) includes piston bush (71), wears Enter the hollow outer piston bar (8) in piston bush (71) and snap onto the hollow inner piston rod (9) of outer piston bar (8) inside center, Interference is equipped with upper piston (94) between inner piston rod (9) the lower part outer wall and piston bush (71) inner wall, piston bush (71) packet The large-diameter portion (74) and small diameter portion (76) connected by limiting section (75) is included, limiting section (75) internal diameter is respectively less than large-diameter portion (74) internal diameter and small diameter portion (76) internal diameter, large-diameter portion (74) top are integrally formed to be connected with and are fastened on abutment ring (34) and connect Abutting part (72) between on the inside of socket part (41), large-diameter portion (74) upper inside wall is recessed to be formed limiting slot (73), described small Diameter portion (76) bottom is downwardly extending guide ring (77), and small diameter portion (76) bottom centre is equipped with cross-hole (79), institute State and be installed with overflow sleeve (78) in small diameter portion (76), the overflow sleeve (78) include positioned at lower central ring washer (781) and Annular casing (782) positioned at outside, annular casing (782) upper surface abut limiting section (75), and annular casing (782) lower end surface is supported Connect small diameter portion (76) bottom, ring washer (781) fitting capping cross-hole (79), ring washer (781) the outer rim circumferential direction It is uniformly connected to the connection sheet (783) of annular casing (782) inner wall lower, forms diversion trench (784) between adjacent tabs (783).

8. a kind of glass dewar as claimed in claim 7, it is characterised in that: the outer piston bar (8) includes upper sleeved rod portion (82) and by upper sleeved rod portion (82) bottom the lower sleeved rod portion (84) being downwardly extending, upper sleeved rod portion (82) upper end is to extension It stretches to be formed epitaxy part (81), the epitaxy part (81), which moves downward, abuts abutting part (72) inside upper surface, the epitaxy part (81) crimp spring (86) between limiting slot (73), upper sleeved rod portion (82) inner wall depression form piston rod groove ring (83), lower sleeved rod portion (84) inner hollow and its upper inside wall are equipped with internal buckle ring (85).

9. a kind of glass dewar as claimed in claim 8, it is characterised in that: the inner piston rod (9) includes upper pole part (91) With the hook part (93) for resisting upper piston (94) formed by upper pole part (91) bottom end outward bending, the upper pole part (91) is outside Wall top is equipped with the outer tooth ring (92) that can be buckled into internal buckle ring (85).

10. a kind of glass dewar as claimed in claim 8, it is characterised in that: the pressing piece (6) includes being located at pressing piece (6) the hollow connecting rod (61) at center and the guide ring (64) being located on the outside of pressing piece (6), pressing piece (6) top is equipped with The spray nozzle part (63) being connected to connecting rod (61), outer cover (5) top are equipped with the opening portion that spray nozzle part (63) can be made to pass through (55), connecting rod (61) the lower part outer wall is equipped with the connecting rod double wedge ring (62) that cooperation buckles into piston rod groove ring (83), institute Stating guide ring (64) can be along interior retaining ring (52) annular outer wall oscilaltion.