Lightweight pull ring combined cover

Abstract

The utility model discloses a light-weight pull ring combined cover which comprises an outer cover and an inner cover arranged in the outer cover, and a rubber plug is arranged between the outer cover and the inner cover. The inner cover, the rubber plug and the outer cover are assembled and then fixed at the opening of the infusion bottle; a clamping portion used for being connected with the inner cover is arranged at the bottom of the outer cover, a pull ring is arranged on the top of an outer cover body, and a clamping table buckled with the clamping portion is arranged on the outer wall of the inner cover. The size of the inner cover and the size of the outer cover are adjusted on the basis of a mature combined cover, on the premise that normal functions of the combined cover are guaranteed, the size of the combined cover is integrally reduced, raw materials needed by a single combined cover during production are reduced, light weight of the combined cover is achieved, and meanwhile environmental protection performance of production is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field, especially a kind of light-weighted pull ring combination cover. BACKGROUND

[0002] With the extensive application of infusion therapy in medical field, large infusion pull ring combination cover packaging products are also constantly updated. The existing pull ring combination cover is very mature in various functional tests and use performance. However, the currently used pull ring combination cover mold produces large-weight pull ring combination cover, and the sales volume is hundreds of billions per year. Large-weight pull ring combination cover causes a large amount of raw material waste, and is not conducive to environmental protection. SUMMARY

[0003] The utility model aims at overcoming the deficiency of prior art, and provides a light-weighted pull ring combination cover, which is reduced in size as a whole under the premise of ensuring the normal function of the combination cover, and the raw materials required for a single combination cover during production are reduced, so that the light-weighted combination cover is realized while the environmental protection during production is ensured.

[0004] The utility model aims at overcoming the deficiency of prior art, and provides a light-weighted pull ring combination cover, which is reduced in size as a whole under the premise of ensuring the normal function of the combination cover, and the raw materials required for a single combination cover during production are reduced, so that the light-weighted combination cover is realized while the environmental protection during production is ensured.

[0005] A light-weighted pull ring combination cover, comprising an outer cover and an inner cover arranged in the outer cover, wherein a rubber plug is arranged between the outer cover and the inner cover; the inner cover, the rubber plug and the outer cover are fixed on the bottle mouth of an infusion bottle after assembly; a clamping portion for connecting the inner cover is arranged at the bottom of the outer cover, a pull ring is arranged at the top of the outer cover body, and a clamping table that is buckled with the clamping portion is arranged on the outer wall of the inner cover.

[0006] The ratio of the height of the side wall of the outer cover to the inner diameter of the bottle mouth of the infusion bottle embryo is 0.60-0.75, the ratio of the overall height of the outer cover to the inner diameter of the bottle mouth of the infusion bottle embryo is 0.80-0.85, the ratio of the inner diameter of the outer cover to the inner diameter of the bottle mouth of the infusion bottle embryo is 1.10-1.30, the ratio of the outer diameter of the outer cover to the inner diameter of the bottle mouth of the infusion bottle embryo is 1.10-1.50, and the ratio of the diameter of the pull ring to the inner diameter of the bottle mouth of the infusion bottle embryo is 0.90-1.00.

[0007] The ratio of the inner diameter of the inner cover to the inner diameter of the bottle mouth of the infusion bottle embryo is 1.01-1.10, and the ratio of the outer diameter of the inner cover to the inner diameter of the bottle mouth of the infusion bottle embryo is 1.00-1.20.

[0008] Further, an assembly cavity for assembling the rubber plug is formed between the inner cover and the outer cover.

[0009] Further, the diameter of the assembly cavity is 0.1mm-0.3mm larger than the diameter of the rubber plug.

[0010] Further, the rubber plug thickness direction size is greater than the assembly cavity height 0.5-0.6mm.

[0011] Further, the assembly cavity diameter is less than the rubber plug diameter 0.2mm-0.4mm.

[0012] Further, the rubber plug thickness direction size is greater than the assembly cavity height 0.3-0.4mm.

[0013] Further, the inner cover is welded with the infusion bottle preform, and the inner cover and the infusion bottle preform connection part forms an inner welding line; the outer cover is welded with the infusion bottle preform, and the outer cover and the infusion bottle preform connection part forms an outer welding line.

[0014] The diameter of the inner welding line is greater than the inner diameter of the infusion bottle preform 2.5mm-3mm.

[0015] The diameter of the outer welding line is less than the outer diameter of the infusion bottle preform 3mm-3.5mm.

[0016] Further, the inner welding line width is 0.3mm-0.5mm.

[0017] The outer welding line width is 0.7mm-1mm.

[0018] Further, the inner welding line is higher than the outer welding line 0.1mm-0.2mm.

[0019] The beneficial effects of the present application are:

[0020] 1) The present application adjusts the size of the inner cover and the outer cover on the basis of the mature combined cover, and under the premise of ensuring the normal function of the combined cover, the size is reduced as a whole, the raw materials required for a single combined cover during production are reduced, and the light weight of the combined cover is realized while the environmental protection of production is ensured.

[0021] 2) The special setting of the assembly cavity and the rubber plug can ensure that the extrusion amount meets the use demand, avoid the liquid leakage problem caused by insufficient / excessive small extrusion amount of the rubber plug, or the problem of the large extrusion amount of the rubber plug, that is, when the puncture needle enters the rubber plug, the large extrusion amount directly extrudes the needle out and the large puncture force.

[0022] 3) Ensure that the inner welding line and the outer welding line are within the infusion bottle mouth disc. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic view of the light weight pull ring combined cover welded with the infusion bottle preform in the embodiment of the present application;

[0024] Figure 2 It is a schematic view of the overall structure of the light weight pull ring combined cover in the embodiment of the present application;

[0025] Figure 3 Schematic diagram of the outer cover;

[0026] Figure 4 Schematic diagram of the inner cover;

[0027] In the figure, 1, outer cover; 2, inner cover; 3, rubber plug; 4, clamping part; 5, clamping platform; 6, pull ring; 7, assembly cavity; 8, inner welding line; 9, outer welding line. DETAILED DESCRIPTION

[0028] The following will be combined with the embodiments to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present invention.

[0029] See Figures 1-4 , the utility model provides a technical solution:

[0030] Example:

[0031] like Figures 1-4 As shown, a lightweight pull-ring combination cap comprises an outer cap 1 and an inner cap 2 disposed within the outer cap 1, with a rubber plug 3 disposed between the outer cap 1 and the inner cap 2; the inner cap 2, the rubber plug 3, and the outer cap 1 are assembled and fixed to the mouth of the infusion bottle; a clamping portion 4 for connecting to the inner cap 2 is provided at the bottom of the outer cap 1, a pull ring 6 is provided at the top of the outer cap 1, and a clamping platform 5 is provided on the outer wall of the inner cap 2 to be fastened with the clamping portion 4;

[0032] The ratio of the side wall height of the outer cover 1 (10.5 mm in this embodiment) to the overall height of the outer cover 1 (13.4 mm) is 0.7836; the ratio of the side wall height of the outer cover to the inner diameter of the bottle mouth of the infusion bottle preform is 0.656, and the ratio of the overall height of the outer cover to the inner diameter of the bottle mouth of the infusion bottle preform is 0.837. (The ratio of the side wall height of the outer cover to the overall height of the outer cover in the prior art is 0.792, the side wall height is 12.2 mm, and the overall height is 15.4). The ratio of the inner diameter (19.01 mm) (the inner diameter of the outer cap 1 in the prior art is 20.09 mm) to the inner diameter (16 mm) of the bottle mouth of the infusion bottle preform is 1.188, the ratio of the outer diameter (21.5 mm) of the outer cap 1 in the prior art is 22.75 mm) to the inner diameter of the bottle mouth of the infusion bottle preform is 1.343, and the ratio of the diameter (15.5 mm) of the pull ring 6 (the diameter of the pull ring in the prior art is 15.77 mm) to the inner diameter of the bottle mouth of the infusion bottle preform is 0.9688;

[0033] The ratio of the inner diameter (16.51mm) of the inner cover 2 (the inner diameter of the inner cover in the prior art is 17.79mm) to the bottle opening inner diameter of the infusion bottle embryo is 1.032, and the ratio of the outer diameter (19.02mm) of the inner cover 2 (the outer diameter of the inner cover in the prior art is 20.05mm) to the bottle opening inner diameter of the infusion bottle embryo is 1.188. The height of the inner cover 2 is reduced by 21.39% compared with the height of the inner cover 2 in the prior art.

[0034] The assembly cavity 7 for assembling the rubber plug 3 is formed between the inner cover 2 and the outer cover 1. On the basis of the mature combined cover, the size of the inner cover 2 and the outer cover 1 is adjusted in the utility model, and the size is reduced as a whole under the premise of ensuring the normal function of the combined cover. The raw materials required for a single combined cover during production are reduced, the light weight of the combined cover is realized, and the environmental protection during the production of the combined cover is ensured.

[0035] Among them, the size adjustment is: reducing the inner and outer diameters of the outer cover 1, reducing the height of the side wall of the outer cover 1, and reducing the wall thickness of the side wall of the outer cover 1; reducing the overall height of the inner cover 2.

[0036] Embodiment 2:

[0037] In this embodiment, the diameter of the assembly cavity 7 is greater than the diameter of the rubber plug 3 by 0.1mm-0.3mm on the basis of embodiment 1.

[0038] The thickness direction size of the rubber plug 3 is greater than the height of the assembly cavity 7 by 0.5-0.6mm.

[0039] As shown in Figure 1 and Figure 2 In this embodiment, the extrusion space is reserved, and the extrusion amount of the inner and outer covers 1 and the rubber plug 3 is controlled through two-stage extrusion control. Specifically:

[0040] 1. First-stage extrusion. The cavity diameter of the outer cover 1 for assembling the rubber plug 3 is greater than the diameter size of the rubber plug 3 by 0.1mm-0.3mm. The extrusion space is reserved for the subsequent two-stage extrusion of the rubber plug 3. (See Figure 3 The size x1 is marked, and x1=0.05mm.

[0041] 2. Second-stage extrusion. The thickness direction of the rubber plug 3 is greater than the space height of the combined inner and outer covers 1 by 0.5mm-0.6mm. The thickness of the rubber plug 3 is extruded. (See Figure 3 The sizes x2 and x3 are marked, x2=0.2mm, and x3=0.3mm.

[0042] 3. Third-stage extrusion. The thickness direction of the groove of the rubber plug 3 is greater than the space height of the liquid sealing groove after the combination of the inner and outer covers 1 by 0.2mm-0.3mm. The thickness of the rubber plug 3 is extruded. (See Figure 3 The sizes x4 and x5 are marked, x4=0.08mm, and x5=0.1mm.

[0043] Through the above setting, the extrusion amount can meet the use requirement, avoiding the problem of insufficient / insufficient extrusion amount of the rubber plug 3, or the problem of excessive extrusion amount of the rubber plug 3, that is, when the puncture needle enters the rubber plug 3, the excessive extrusion amount directly extrudes the needle out and the puncture force is large.

[0044] Embodiment 3:

[0045] As shown in Figure 1 and Figure 2 , the difference between this embodiment and embodiment 2 is that the diameter of the assembly cavity 7 is 0.2-0.4 mm smaller than the diameter of the rubber plug 3.

[0046] Further, the thickness direction size of the rubber plug 3 is 0.3-0.4 mm larger than the height of the assembly cavity 7.

[0047] In this embodiment, the extrusion space is reserved, and the extrusion amount of the inner and outer covers 1 and the rubber plug 3 is controlled in two sections, specifically:

[0048] 1. First extrusion. The diameter of the cavity in which the rubber plug 3 is arranged inside the outer cover 1 is 0.2-0.4 mm smaller than the diameter of the rubber plug 3, so as to extrude the rubber plug 3 (see Figure 3 the size x1).

[0049] 2. Second extrusion. The thickness direction of the rubber plug 3 is 0.3-0.4 mm larger than the space height of the combined inner and outer covers 1, so as to extrude the thickness of the rubber plug 3 (see Figure 3 the sizes x2 and x3).

[0050] 3. Third extrusion. The groove thickness direction of the rubber plug 3 is 0.2-0.3 mm larger than the space height of the liquid sealing groove after the combination of the inner and outer covers 1, so as to extrude the thickness of the rubber plug 3. (see Figure 3 the sizes x4 and x5).

[0051] The extrusion amount control mode in embodiments 2 and 3 is suitable for the extrusion requirement of the existing combined cover.

[0052] Embodiment 4:

[0053] As shown in Figure 1 and Figure 2 , on the basis of embodiment 2 or embodiment 3, the inner cover 2 is welded and fixed with the infusion bottle blank, and the connection part of the inner cover 2 and the infusion bottle blank forms an inner welding line 8; the outer cover 1 is welded and fixed with the infusion bottle blank, and the connection part of the outer cover 1 and the infusion bottle blank forms an outer welding line 9;

[0054] The diameter of the inner welding line 8 is 2.5-3 mm larger than the inner diameter of the infusion bottle blank;

[0055] The diameter of the outer welding line 9 is 3mm-3.5mm less than the outer diameter of the infusion bottle embryo.

[0056] The width of the inner welding line 8 is 0.3mm-0.5mm;

[0057] The width of the outer welding line 9 is 0.7mm-1mm.

[0058] The inner welding line 8 is 0.1mm-0.2mm higher than the outer welding line

[0059] Before welding the bottle embryo, the rubber plug 3 is first placed into the inner cavity of the outer cover 1, and then the inner cover 2 is installed into the outer cover 1, and the inner cover 2 is clamped by the inner buckle of the outer cover 1 to form extrusion on the rubber plug 3.

[0060] 1. If the diameter of the inner welding line is too close to the inner hole spacing of the bottle embryo, during welding, due to the too fast welding speed and the size error between the mechanical hand and the product, the outer diameter of the combined cover cannot be accurately positioned with the outer circle of the bottle embryo (insufficient concentricity), which will cause partial welding. At this time, the inner hole is no longer a perfect circle, affecting the puncture and contaminating the medicine.

[0061] 2. If the diameter of the inner welding line is too far from the inner hole spacing of the bottle embryo, it will affect the sol gel accumulation space after the combined cover is welded

[0062] 3. If the width of the inner welding line is too narrow, since the inner cover is combined after welding, the welding line will be 0.1mm-0.2mm higher than the outer welding line, so under high temperature welding, the inner cover will be welded at the moment, and finally a virtual welding will be formed to cause liquid leakage.

[0063] 4. If the width of the inner welding line is too wide, it cannot be completely melted in a short time, which will also form a virtual welding to cause liquid leakage.

[0064] 5. If the diameter of the outer welding line is too close to the outer circle spacing of the bottle embryo, the rubber material will overflow after welding, affecting the appearance and causing partial welding (the same as the first point) to cause liquid leakage.

[0065] 6. If the diameter of the outer welding line is too far from the outer circle spacing of the bottle embryo, it will affect the sol gel accumulation space after the combined cover is welded. Figure 4 The sol gel accumulation space is at the middle Q.

[0066] 7. If the width of the outer welding line is too narrow, it cannot play the role of outer sealing after welding.

[0067] 8. If the width of the outer welding line is too wide, it cannot be completely melted in a short time, which will also form a virtual welding to cause mold and other phenomena, and also affect the appearance.

[0068] 9. The inner welding line is higher than the outer welding line. When the combined cover is welded with the bottle embryo, the deformation of the product after production and the deformation of the assembled cover after being extruded by the plug should be fully considered. In order to ensure that the combined cover does not leak after being welded with the bottle embryo, the first leakage position, i.e. the bottle mouth, must be solved. Since the welding line of the inner cover is first in contact with the heating plate and is melted, the welding line of the outer cover is delayed in contact with the heating plate and is melted. During welding, the welding line of the combined cover is melted into one with the bottle embryo.

[0069] The above description is only the preferred embodiment of the present application, and it should be understood that the present application is not limited to the form disclosed herein, and should not be considered as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein by the above teaching or related technical or knowledge. Any modification and change made by the person skilled in the art without departing from the spirit and scope of the present application shall be within the protection scope of the claims attached hereto.

Claims

1. A lightweight pull-ring assembly cap, comprising an outer cap and an inner cap disposed within the outer cap, with a rubber plug disposed between the outer and inner caps; the inner cap, rubber plug, and outer cap are assembled and fixed to the mouth of an infusion bottle; the outer cap has a snap-fit ​​portion at the bottom for connecting to the inner cap, a pull-ring is disposed at the top of the outer cap, and a latch is disposed on the outer wall of the inner cap for engaging with the snap-fit ​​portion; characterized in that: The ratio of the side wall height of the outer cover to the inner diameter of the bottle mouth of the infusion bottle preform is 0.60-0.75, and the ratio of the overall height of the outer cover to the inner diameter of the bottle mouth of the infusion bottle preform is 0.80-0.85; The ratio of the inner diameter of the outer cover to the inner diameter of the bottle mouth of the infusion bottle preform is 1.10-1.30, the ratio of the outer diameter of the outer cover to the inner diameter of the bottle mouth of the infusion bottle preform is 1.10-1.50, and the ratio of the pull ring diameter to the inner diameter of the bottle mouth of the infusion bottle preform is 0.90-1.00; The ratio of the inner diameter of the inner cap to the inner diameter of the bottle mouth of the infusion bottle preform is 1.01-1.10, and the ratio of the outer diameter of the inner cap to the inner diameter of the bottle mouth of the infusion bottle preform is 1.00-1.

20.

2. The lightweight pull-ring assembly cover according to claim 1, characterized in that: An assembly cavity for assembling the rubber plug is formed between the inner cover and the outer cover.

3. The lightweight pull-ring assembly cover according to claim 2, characterized in that: The diameter of the assembly cavity is 0.1 mm to 0.3 mm larger than the diameter of the rubber plug.

4. The lightweight pull-ring assembly cover according to claim 3, characterized in that: The thickness of the rubber plug is 0.5-0.6 mm greater than the height of the assembly cavity.

5. The lightweight pull-ring assembly cover according to claim 2, characterized in that: The diameter of the assembly cavity is 0.2 mm to 0.4 mm smaller than the diameter of the rubber plug.

6. The lightweight pull-ring assembly cover according to claim 5, characterized in that: The thickness dimension of the rubber plug is 0.3-0.4 mm greater than the height of the assembly cavity.

7. The lightweight pull-ring assembly cover according to claim 1, characterized in that: The inner cover is welded and fixed to the infusion bottle preform, and the connection between the inner cover and the infusion bottle preform forms an inner welding line; the outer cover is welded and fixed to the infusion bottle preform, and the connection between the outer cover and the infusion bottle preform forms an outer welding line; The diameter of the inner welding line is 2.5mm-3mm larger than the inner diameter of the infusion bottle embryo; The diameter of the outer welding line is 3 mm to 3.5 mm smaller than the outer diameter of the infusion bottle embryo.

8. The lightweight pull-ring assembly cover according to claim 7, characterized in that: The inner welding line width is 0.3mm-0.5mm; The outer welding line width is 0.7mm-1mm.

9. The lightweight pull-ring assembly cover according to claim 8, characterized in that: The inner welding line is 0.1 mm to 0.2 mm higher than the outer welding line.

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