CN201676175U - Inverted-type transfusion package - Google Patents

Abstract

The utility model relates to an inverted-type transfusion package comprising a transfusion bottle for holding medical liquid, the bottleneck of the transfusion bottle and a bottle body; the bottle body includes a curve-shaped front side wall and a curve-shaped back side wall which are connected with each other; both the front side wall and the back side wall have a responding shoulder, a responding body and a responding bottom, wherein the front side wall is connected with the back side wall through an arc, the semi-diameter of which ranges between 3mm to 12mm at the body and the bottom. In addition, at the lower part of the bottle body is arranged a connecting pillar; the bottle cover is welded together with the bottleneck of the bottle; the ring has a connecting hole and the connecting pillar at the lower part of the bottle body is connected with the bottle body after the connecting pillar crosses the ring. The inverted-type transfusion package introduced hereby can effectively prevent air around the package from polluting the medical liquid when the air enters the bottle. Further, the transfusion package can be conveniently hung upside down with such a simply-structured and economical design, therefore, making the package more likely to be widely promoted.

Description

Inverted transfusion package

Technical field

This utility model relates to the medical packaging field, in particular to a kind of inverted transfusion package.

Background technology

Present transfusion package mode mainly contains two kinds, i.e. plastic bottle transfusion package and soft bag transfusion package.Fig. 1 shows the structure of the plastic bottle transfusion package of prior art, and Fig. 2 shows the K of this plastic bottle transfusion package to view; Fig. 3 shows the structure of the soft bag transfusion package of prior art, and Fig. 4 shows the vertical view of this soft bag transfusion package.With regard to the plastic bottle transfusion package, it has the low advantage of cost, but because plastic bottle can not shrink (as shown in Figure 2), thereby in infusion process, ambient air can be infiltrated in the plastic bottle, and this just unavoidably produces medicinal liquid and pollutes, and is unfavorable for patient's health; With regard to soft bag transfusion package, can shrink (as shown in Figure 4) because constitute the thin film of soft bag, thus in infusion process, there is not air to infiltrate, no liquid medicine contamination, but because the soft bag infusion product price is higher relatively, so aspect promoting the use of, be restricted.

Therefore, await providing a kind of novel transfusion package.

The utility model content

This utility model aims to provide a kind of inverted transfusion package, it can solve owing to the plastic bottle infusion products can not shrink to cause in infusion process and in the ambient air infiltration bottle medicinal liquid be produced pollution problems, and it is convenient to that the transfusion package reversal of the natural order of things is also had lower cost with respect to packed in flexible pouchy.

According to this utility model, a kind of inverted transfusion package is provided, it comprises: infusion bottle, be used for the splendid attire medicinal liquid, and infusion bottle comprises bottleneck and bottle, bottle comprises and is curve form and front side wall that is bonded to each other and rear wall respectively, and each in front side wall and the rear wall comprises corresponding shoulder, body and bottom respectively, and wherein, front side wall is connected with arc transition with rear wall, and at the body place and bottom place, the radius of this circular arc is greater than 3mm and less than 12mm; Hang sheet, be positioned at below the bottle body bottom and have to hold and hang perforation; And bottle cap, weld together with the bottleneck of infusion bottle.Bottle cap is a composite cover, composite cover comprises: inner cap has first passage portion and second channel portion, and is respectively equipped with diaphragm seal in first passage portion and the second channel portion, first passage portion diaphragm seal top has first groove, and second channel portion diaphragm seal top has second groove; First plug places first groove, is positioned at first passage portion diaphragm seal top, is used to seal first passage portion; Second plug places second groove, is positioned at second channel portion diaphragm seal top, is used to seal second channel portion; Enclosing cover, be set in the inner cap outside, and inner cap and enclosing cover are connected together, enclosing cover has third channel portion and four-way portion, third channel portion and four-way portion opening part are respectively equipped with third channel portion closure member and four-way portion closure member, and remove third channel portion closure member along third channel portion opening, first plug is exposed in the air, remove four-way portion closure member along four-way portion opening, second plug is exposed in the air, wherein, third channel portion closure member and four-way portion closure member all are easy folding parts; Wherein, and inner cap bottom mutually concordant with cover bottom portion, inner cap bottom and the cover bottom portion while bottleneck with infusion bottle welds, and at least one is injection-moulded in the inner cap in first plug and second plug.

Preferably, hang sheet and the infusion bottle structure that is formed in one.

Preferably, the ratio of the width of bottle and thickness is greater than 1.8 and less than 5.

Preferably, the outer surface of the front side wall of bottle and/or rear wall is provided with the applying guiding groove.

Preferably, easily the structure of folding part is foldable handle, easy broken rod or easy-to-fold cap.

Preferably, first plug and second plug all are injection-moulded in the inner cap.

Preferably, be provided with the enclosing cover connecting portion in the bottom of enclosing cover, be provided with the bottleneck connecting portion at the top of bottleneck, by the enclosing cover connecting portion is welded mutually with the bottleneck connecting portion, the bottleneck of bottle cap and bottle welds together.

Preferably, inner cap has snap ring, and enclosing cover has annular slot, inner cap and enclosing cover snap ring and the annular slot engagement connection by matching each other.

Adopt inverted transfusion package of the present utility model, having overcome conventional plastic bottle infusion products can not shrink and cause in infusion process ambient air to infiltrate in the bottle and then to medicinal liquid generation pollution problems, it has realized the contraction of plastic bottle in infusion process by rational design, thereby avoid ambient air to infiltrate infusion bottle and then enter in the medicinal liquid, and this inverted transfusion package can hang upside down easily, it is simple in structure, easy to use, and cost is lower, is suitable for promoting the use of.

Description of drawings

Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, and illustrative examples of the present utility model and explanation thereof are used to explain this utility model, do not constitute improper qualification of the present utility model.In the accompanying drawings:

Fig. 1 is the cutaway view of the plastic bottle transfusion package of prior art;

Fig. 2 is that the K of plastic bottle transfusion package shown in Figure 1 is to view;

Fig. 3 is the cutaway view of the soft bag transfusion package of prior art;

Fig. 4 is the vertical view of soft bag transfusion package shown in Figure 3;

Fig. 5 is the front view according to first embodiment of the infusion bottle of this utility model transfusion package;

Fig. 6 and Fig. 7 are respectively the side view and the vertical view of infusion bottle shown in Figure 5;

Fig. 8 is the front view according to second embodiment of the infusion bottle of this utility model transfusion package;

Fig. 9 and Figure 10 are respectively the side view and the vertical view of infusion bottle shown in Figure 8;

Figure 11 is the cutaway view according to first embodiment of the bottle cap of this utility model transfusion package;

Figure 12 is the vertical view of bottle cap shown in Figure 11;

Figure 13 is the cutaway view according to second embodiment of the bottle cap of this utility model transfusion package;

Figure 14 is the vertical view of bottle cap shown in Figure 13;

Figure 15 is the cutaway view according to the 3rd embodiment of the bottle cap of this utility model transfusion package;

Figure 16 is the vertical view of bottle cap shown in Figure 15;

Figure 17 is the cutaway view according to the 4th embodiment of the bottle cap of this utility model transfusion package;

Figure 18 is the vertical view of bottle cap shown in Figure 17;

Figure 19 is the cutaway view according to the 5th embodiment of the bottle cap of this utility model transfusion package;

Figure 20 is the vertical view of bottle cap shown in Figure 19;

Figure 21 is the cutaway view according to the 6th embodiment of the bottle cap of this utility model transfusion package;

Figure 22 is the vertical view of bottle cap shown in Figure 21;

Figure 23 is the partial sectional view according to first embodiment of transfusion package of the present utility model;

Figure 24 is the vertical view of transfusion package shown in Figure 23;

Figure 25 is the partial sectional view according to second embodiment of transfusion package of the present utility model;

Figure 26 is the vertical view of transfusion package shown in Figure 25;

Figure 27 is the partial sectional view according to the 3rd embodiment of transfusion package of the present utility model;

Figure 28 is the vertical view of transfusion package shown in Figure 27;

Figure 29 is the partial sectional view according to the 4th embodiment of transfusion package of the present utility model;

Figure 30 is the vertical view of transfusion package shown in Figure 29;

Figure 31 is the partial sectional view according to the 5th embodiment of transfusion package of the present utility model;

Figure 32 is the vertical view of transfusion package shown in Figure 31;

Figure 33 is the partial sectional view according to the 6th embodiment of transfusion package of the present utility model; And

Figure 34 is the vertical view of transfusion package shown in Figure 33.

The specific embodiment

Describe this utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.

Fig. 5 is the front view according to first embodiment of the infusion bottle of this utility model transfusion package; Fig. 6 and Fig. 7 are respectively the side view and the vertical view of infusion bottle shown in Figure 5.Shown in Fig. 5-7, medicinal liquid is contained in the infusion bottle 2, the infusion bottle 2 of this embodiment comprises: bottleneck 21 and bottle 23, bottle 23 comprises front side wall 231 and the rear wall 233 that is curve form respectively and is bonded to each other, in front side wall 231 and the rear wall 233 each comprises each self-corresponding shoulder 231a downwards successively from bottleneck 21,233a, body 231b, 233b and bottom 231c, 233c, wherein, as Fig. 6 and 7 clearer illustrating, the front side wall 231 of bottle 23 and rear wall 233 are connected with arc transition, and more specifically, front side wall 231 and rear wall 233 are at body 231b, 233b place and bottom 231c, 233c sentences the less little arc transition of radius and connects, and the width W of bottle 23 goes out the enough multiples of thickness T greatly, so, this infusion bottle (such as plastic bottle) constitutes an oblate packing container (as shown in Figure 7), when with infusion bottle 2 and during infusing with transfusion package reversal of the natural order of things after bottle cap combines, be the front side wall 231 and the close gradually also applying of rear wall 233 of curve form, thereby can reach the result of use of soft bag transfusion package in the prior art, prevent that promptly the air infiltration infusion bottle in the surrounding from going forward side by side into the liquid.Preferably, front side wall 231 and rear wall 233 all are the curve form of rounding off, can prevent the supporting role of flex point in the non-rounding off curved surface like this and hinder front side wall 231 and rear wall 233 near and applying, help the contraction of transfusion package.Compare with the production technology of packed in flexible pouchy, the cost of producing this plastic bottle is obviously lower.Preferably, front side wall 231 and rear wall 233 at the arc radius of body 231b, 233b place and bottom 231c, 233c place arc transition greater than 3mm and less than 12mm, and preferably, the ratio of the width W of bottle 23 and thickness T is greater than 1.8 and less than 5, when getting the numerical value of this scope, the front side wall 231 of this infusion bottle 2 and rear wall 233 can be realized fitting better.In this embodiment, the bottleneck 21 of infusion bottle 2 and bottle 23 can be integrated.

As shown in Figure 5, joint line between front side wall 231 and the rear wall 233 (being outer contour shown in Figure 5) is one and disconnects at bottleneck 21 places and curve that other place links up, specifically, the transition position of shoulder 231a, 233a and body 231b, 233b upper end is a circular arc line, at body 231b, 233b lower end and bottom 231c, 233c transition position is circular arc line also, and can be the assemble line of straight line, camber line or straight line and camber line at shoulder 231a, 233a, body 231b, 233b and bottom 231c, 233c three places.As a kind of special case, the joint line at shoulder 231a, 233a place can be directly tangent with body 231b, 233b during for circular arc line, also can be directly tangent with body 231b, 233b when the joint line at bottom 231c, 233c place is circular arc line.In a preferred embodiment, be the front side wall 231 of curve form and rear wall 233 about the faying face symmetry.In other embodiments, front side wall and rear wall are asymmetric setting, and for example the surface area of front side wall 231 is greater than or less than the surface area of rear wall 233.

Also show among Fig. 5 and hang sheet 27, it is arranged on below the bottom of bottle 23 and has to hold and hangs perforation 273, hangs holding of sheet 27 by this and hangs the transfusion packages that perforation 273 can will have this infusion bottle 2 when the transfusion easily and hang upside down to infuse.Preferably, this hang sheet 27 can be one-body molded with infusion bottle 2.In addition, in the infusion bottle 2 of this embodiment, the top that centers on bottleneck 21 is provided with bottleneck connecting portion 213, so that weld mutually with bottle cap, this will be further described below.

Fig. 8 is the front view according to second embodiment of the infusion bottle of this utility model transfusion package; Fig. 9 and Figure 10 are respectively the side view and the vertical view of bottle shown in Figure 8.The difference of the infusion bottle of the infusion bottle of this embodiment and above-mentioned first embodiment is, extremely shown in Figure 10 as Fig. 8, the front side wall 231 of bottle 23 and the outer surface of rear wall 233 are provided with applying guide channel 2311 and 2331, these applying guide channels can be linearly or the combination of camber line or straight line and camber line extend, the bootable front side wall 231 of applying guide channel is set during infusing, more easily fits with rear wall 233.

At other embodiment, front side wall 231 and rear wall 233 the two one of one or more applying guide channel can be set, another can not open or open one or open many applying guide channels, and both line of rabbet joint can symmetry also can be asymmetric.Also preferably, the curved surface of front side wall 231 and rear wall 233 can be identical so that manufacturing still also can have different curved surfaces as the case may be.

Figure 11 is the cutaway view according to first embodiment of the bottle cap of this utility model transfusion package; Figure 12 is the vertical view of bottle cap shown in Figure 11.In conjunction with referring to Figure 11 and 12, among this embodiment, bottle cap is two plug composite covers, comprise: inner cap 32, have first passage portion 321 and second channel portion 322, and be respectively equipped with diaphragm seal 3211,3221 in first passage portion 321 and the second channel portion 322, first passage portion diaphragm seal 3211 tops have first groove 3213, and second channel portion diaphragm seal 3221 tops have second groove 3223; First plug 34 places first groove 3213, is positioned at first passage portion diaphragm seal 3211 tops, is used to seal first passage portion 321; Second plug 35 places second groove 3223, is positioned at second channel portion diaphragm seal 3221 tops, is used to seal second channel portion 322; Enclosing cover 36, be set in inner cap 32 outsides, and inner cap 32 is connected together with enclosing cover 36, in the present embodiment, as shown in the figure, inner cap 32 has snap ring 327, enclosing cover 36 has annular slot 367, inner cap 32 and the snap ring 327 and annular slot 367 engagement connections of enclosing cover 36 by matching each other, enclosing cover 36 has third channel portion 361 and four-way portion 362, third channel portion 361 and four-way portion 362 opening parts are respectively equipped with third channel portion closure member 368 and four-way portion closure member 369, according to this utility model, third channel portion closure member and four-way portion closure member all are easy folding parts, and in this embodiment, third channel portion closure member 368 and four-way portion closure member 369 all are easy-to-fold caps, remove third channel portion closure member 368 (easy-to-fold cap) along third channel portion 361 openings, first plug 34 is exposed in the air, removes four-way portion closure member 369 (easy-to-fold cap) along four-way portion 362 openings, and second plug 35 is exposed in the air.Wherein, inner cap 32 bottoms are mutually concordant with enclosing cover 36 bottoms, thereby inner cap 32 bottoms and enclosing cover 36 bottoms can whiles and the bottleneck welding of infusion bottle as mentioned above.As shown in the figure, preferably, be provided with enclosing cover connecting portion 363 around enclosing cover 36 lower ends, like this, by enclosing cover connecting portion 363 and the bottleneck connecting portion 213 that is provided with around bottleneck 21 tops are as mentioned above welded together, bottle cap can be bonded together with the bottleneck 21 of infusion bottle 2.In addition, first plug 34 and second plug 35 all are injection-moulded in the inner cap 32, certainly, also can be that a plug in first plug 34 and second plug 35 is injection-moulded in the inner cap 32, and another plug is arranged in the inner cap 32 by other suitable manner, for example, is connected in the inner cap.Preferably, first passage portion 321 is identical with second channel portion 322 size structures, and third channel portion 361 is identical with four-way portion 362 size structures.Like this, be convenient to make, and good looking appearance, it can certainly be designed to identical size and structure, can satisfy the needs of various situations like this.

Figure 13 is the cutaway view according to second embodiment of the bottle cap of this utility model transfusion package; Figure 14 is the vertical view of bottle cap shown in Figure 13.The difference of the bottle cap of the bottle cap of this embodiment and above-mentioned first embodiment is that in this second embodiment, third channel portion closure member 368 and four-way portion closure member 369 have all made easy broken rod into.

Figure 15 is the cutaway view according to the 3rd embodiment of the bottle cap of this utility model transfusion package; Figure 16 is the vertical view of bottle cap shown in Figure 15.The difference of the bottle cap of the bottle cap of this embodiment and above-mentioned first embodiment is that in the 3rd embodiment, third channel portion closure member 368 and four-way portion closure member 369 have all made foldable handle into.

Figure 17 is the cutaway view according to the 4th embodiment of the bottle cap of this utility model transfusion package; Figure 18 is the vertical view of bottle cap shown in Figure 17.The difference of the Bottle cap structure of the bottle cap of this embodiment and above-mentioned first embodiment is that in the 3rd embodiment, third channel portion closure member 368 is easy-to-fold caps, and four-way portion closure member 369 is easy broken rods.

Figure 19 is the cutaway view according to the 5th embodiment of the bottle cap of this utility model transfusion package; Figure 20 is the vertical view of bottle cap shown in Figure 19.The difference of the Bottle cap structure of the bottle cap of this embodiment and above-mentioned first embodiment is that in the 5th embodiment, third channel portion closure member 368 is easy-to-fold caps, and four-way portion closure member 369 is foldable handles.

Figure 21 is the cutaway view according to the 6th embodiment of the bottle cap of this utility model transfusion package; Figure 22 is the vertical view of bottle cap shown in Figure 21.The difference of the Bottle cap structure of the bottle cap of this embodiment and above-mentioned first embodiment is that in the 6th embodiment, third channel portion closure member 368 is easy broken rods, and four-way portion closure member 369 is foldable handles.

Figure 23 is the partial sectional view according to first embodiment of transfusion package of the present utility model; Figure 24 is the vertical view of transfusion package shown in Figure 23.As shown in the figure, in this embodiment, transfusion package comprises: the infusion bottle 2 of splendid attire medicinal liquid 1; Below bottle cap 3 that welds mutually with the bottleneck of infusion bottle 2 and the bottle body bottom that is positioned at infusion bottle 2 and have and be used to hang upside down that holding of transfusion package hang perforation hangs sheet 27.Wherein, infusion bottle 2 and the structure of hanging sheet 27 are identical with first embodiment of the infusion bottle of describing with reference to Fig. 5-7, and the structure of bottle cap 3 is with identical with reference to first embodiment of the described bottle cap of Figure 11-12, thereby do not repeat them here.

Figure 25 is the partial sectional view according to second embodiment of transfusion package of the present utility model; Figure 26 is the vertical view of transfusion package shown in Figure 25.The difference of the transfusion package of the transfusion package of this embodiment and above-mentioned first embodiment is that the structure of the bottle cap 3 among this embodiment is with identical with reference to second embodiment of the described bottle cap of Figure 13-14.

Figure 27 is the partial sectional view according to the 3rd embodiment of transfusion package of the present utility model; Figure 28 is the vertical view of transfusion package shown in Figure 27.The difference of the transfusion package of the transfusion package of this embodiment and above-mentioned first embodiment is that the structure of the bottle cap 3 among this embodiment is with identical with reference to the 3rd embodiment of the described bottle cap of Figure 15-16.

Figure 29 is the partial sectional view according to the 4th embodiment of transfusion package of the present utility model; Figure 30 is the vertical view of transfusion package shown in Figure 29.The difference of the transfusion package of the transfusion package of this embodiment and above-mentioned first embodiment is that the structure of the bottle cap 3 among this embodiment is with identical with reference to the 4th embodiment of the described bottle cap of Figure 17-18.

Figure 31 is the partial sectional view according to the 5th embodiment of transfusion package of the present utility model; Figure 32 is the vertical view of transfusion package shown in Figure 31.The difference of the transfusion package of the transfusion package of this embodiment and above-mentioned first embodiment is that the structure of the bottle cap 3 among this embodiment is with identical with reference to the 5th embodiment of the described bottle cap of Figure 19-20.

Figure 33 is the partial sectional view according to the 6th embodiment of transfusion package of the present utility model; Figure 34 is the vertical view of transfusion package shown in Figure 33.The difference of the transfusion package of the transfusion package of this embodiment and above-mentioned first embodiment is that the structure of the bottle cap 3 among this embodiment is with identical with reference to the 6th embodiment of the described bottle cap of Figure 21-22.

It will be understood by those skilled in the art that the infusion bottle according to transfusion package of the present utility model also can adopt the structure shown in Fig. 8-10.

As can be seen from the above description, transfusion package of the present utility model has been realized following technique effect:

Adopt inverted transfusion package of the present utility model, above-mentioned unique design by infusion bottle, overcome because the plastic bottle infusion products can not shrink in infusion process because ambient air is infiltrated infusion bottle and caused problem to liquid medicine contamination, the health of having avoided endangering the patient; In addition, in inverted transfusion package of the present utility model,, thereby when transfusion, can easily transfusion package be hung upside down because sheet is hung in design.

The above is a preferred embodiment of the present utility model only, is not limited to this utility model, and for a person skilled in the art, this utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims (8)

1. an inverted transfusion package is characterized in that, comprising:

Infusion bottle (2), be used for splendid attire medicinal liquid (1), described infusion bottle (2) comprises bottleneck (21) and bottle (23), described bottle (23) comprises front side wall (231) and the rear wall (233) that is curve form respectively and is bonded to each other, in described front side wall and the described rear wall each comprises corresponding shoulder (231a respectively, 233a), body (231b, 233b) and bottom (231c, 233c), wherein, described front side wall (231) is connected with arc transition with rear wall (233), and at body (231b, 233b) locate and (231c 233c) locates, and the radius of described circular arc (r) is greater than 3mm and less than 12mm in the bottom;

Hang sheet (27), be positioned at below the bottom of described bottle (23) and have to hold and hang perforation (273); And

Bottle cap (3) welds together with the bottleneck (21) of described infusion bottle (2), and described bottle cap (3) is a composite cover, and described composite cover comprises:

Inner cap (32), have first passage portion (321) and second channel portion (322), and be respectively equipped with diaphragm seal (3211 in described first passage portion (321) and the described second channel portion (322), 3221), described first passage portion's diaphragm seal (3211) top has first groove (3213), and described second channel portion's diaphragm seal (3221) top has second groove (3223);

First plug (34) places described first groove (3213), is positioned at described first passage portion's diaphragm seal (3211) top, seals described first passage portion (321);

Second plug (35) places described second groove (3223), is positioned at described second channel portion's diaphragm seal (3221) top, seals described second channel portion (322);

Enclosing cover (36), be set in described inner cap (32) outside, and described inner cap (32) is connected together with described enclosing cover (36), described enclosing cover (36) has third channel portion (361) and four-way portion (362), described third channel portion (361) is respectively equipped with third channel portion closure member (368) and four-way portion closure member (369) with described four-way portion (362) opening part, and remove described third channel portion's closure member (368) along described third channel portion (361) opening, described first plug (34) is exposed in the air, remove described four-way portion's closure member (369) along described four-way portion (362) opening, described second plug (35) is exposed in the air, wherein, described third channel portion's closure member (368) all is easy folding part with described four-way portion's closure member (369);

Wherein, the bottom of described inner cap (32) is mutually concordant with the bottom of described enclosing cover (36), and at least one is injection-moulded in the described inner cap (32) in described first plug (34) and described second plug (35).

2. inverted transfusion package according to claim 1 is characterized in that, described sheet (27) and described infusion bottle (2) structure that is formed in one of hanging.

3. inverted transfusion package according to claim 1 is characterized in that, the width (W) of described bottle (23) and the ratio of thickness (T) are greater than 1.8 and less than 5.

4. inverted transfusion package according to claim 1 is characterized in that, the front side wall (231) of described bottle (23) and/or the outer surface of rear wall (233) are provided with applying guiding groove (2311; 2331).

5. inverted transfusion package according to claim 1 is characterized in that, the structure of described easy folding part is foldable handle, easy broken rod or easy-to-fold cap.

6. inverted transfusion package according to claim 1 is characterized in that, described first plug (34) and described second plug (35) all are injection-moulded in the described inner cap (32).

7. inverted transfusion package according to claim 1, it is characterized in that, be provided with enclosing cover connecting portion (363) in the bottom of described enclosing cover (36), be provided with bottleneck connecting portion (213) at the top of described bottleneck (21), described enclosing cover connecting portion (363) welds together with described bottleneck connecting portion (213).

8. inverted transfusion package according to claim 1, it is characterized in that, described inner cap (32) has snap ring (327), described enclosing cover (36) has annular slot (367), described inner cap (32) and the described snap ring (327) and described annular slot (367) engagement connection of described enclosing cover (36) by matching each other.

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