CN111762448A - A sealing structure for bottle body and bottle cap - Google Patents

Abstract

In order to solve the problem that the traditional sealing ring is a sealing ring with a rectangular section, which is mainly in contact with the top surface of the bottle body, and the sealing ring is easy to deform and fall off, the present invention proposes a sealing structure between the bottle body and the bottle cap. On the basis of the existing interference fit seal, a circular sealing ring is designed, which is in contact with the upper end of the inner side wall of the bottle mouth structure of the bottle body for sealing, which not only solves the problem of poor interference fit sealing effect, but also solves the problem of It solves the problem that the square sealing ring is easy to fall off, and also solves the problem that the square sealing ring is easy to be distorted and deformed, and it can also be well sealed when the roundness of the bottle mouth is relatively poor.

Description

A sealing structure for bottle body and bottle cap

technical field

The invention relates to the field of medical devices, and more particularly, to a sealing structure of a bottle body and a bottle cap.

Background technique

There are two methods of sealing the bottle body and the bottle cap on the market. One of them is that when the bottle cap is made of soft material, such as LDPE and HDPE, the bottle cap and the bottle body can be made into interference fit, so as to achieve a tight seal. The other is that when the bottle cap is made of relatively hard material, such as stainless steel, iron material, or PP, the bottle cap itself has no elasticity. It is necessary to introduce a sealing ring 2, but the traditional sealing ring is a sealing ring with a rectangular cross-section, mainly for sealing with the top surface of the bottle body, and the sealing is easy to deform and fall off.

The sealing effect of the first interference sealing scheme is poor, especially when the roundness of the bottle body is relatively poor, the sealing effect will be worse; when the second sealing ring with a rectangular cross-section is used for sealing, the sealing effect of the sealing ring is poor, as shown in the figure As shown in Figures 1 and 2, the sealing ring is easily detached from the bottle cap. In addition, as shown in Figures 3 and 4, the sealing ring itself is easily distorted by being squeezed by the open end of the bottle body.

SUMMARY OF THE INVENTION

In view of this, in order to solve the problem that the traditional sealing ring is a sealing ring with a rectangular cross section, it is mainly in contact with the top surface of the bottle body, and the sealing ring is easy to deform and fall off. The present invention proposes a bottle body and bottle cap. Sealing structure, the present invention is based on the existing interference fit sealing, and designs a circular sealing ring in cross section, which is in contact with the upper end of the inner side wall of the bottle mouth structure of the bottle body for sealing, which not only solves the interference fit sealing effect It also solves the problem that the square sealing ring is easy to fall off, and also solves the problem that the square sealing ring is easily distorted and deformed, and it can also be well sealed when the roundness of the bottle mouth is relatively poor.

A sealing structure of a bottle body and a bottle cap, comprising: a bottle cap 1, a sealing ring 2 and a bottle body 4, the bottle cap 1 includes: an upper cover body 11 and an anti-falling structure 12, the bottle cap 1 and the bottle body 4 It is characterized in that: the inside of the upper cover body 11 is provided with an anti-shedding structure 12, and an accommodation chamber 14 is formed between the inner wall of the upper cover body 11 and the outer wall of the anti-falling structure 12, and the sealing ring 2 is located in the The connection between the outer wall of the anti-falling structure 12 and the upper inner wall of the upper cover body 11 is placed in the accommodating chamber 14, the cross section of the sealing ring 2 is circular, and the upper part of the bottle body 4 is provided with a bottle mouth structure 41. The bottle mouth structure 41 is located in the accommodating chamber 14 and the inner wall of the bottle mouth structure 41 is abutted against the outer edge of the sealing ring 2 , and the upper cover body 11 can completely cover the bottle mouth structure 41 .

Further, the inner diameter of the sealing ring 2 is 0-0.5 mm smaller than the diameter of the circle formed by the outer wall of the anti-falling structure 12, so that the sealing ring 2 will not fall off after being sleeved on the anti-falling structure 12, and the inner side of the sealing ring 2 will not fall off. The diameter is larger than the diameter of the circle formed by the outer wall of the anti-shedding structure 12 and is easy to fall off, and the inner diameter of the sealing ring 2 is too smaller than the diameter of the circle formed by the outer wall of the anti-shedding structure 12. Easy to assemble.

Further, the outer diameter of the sealing ring 2 is 0.3-1.0 mm larger than the inner side wall diameter of the bottle mouth structure 41, so as to ensure that the bottle body 4 can also have a good sealing effect when the roundness of the bottle body 4 is relatively poor.

Further, the lower part of the outer side wall of the anti-falling structure 12 is provided with an integrally formed undercut structure 13, and the range of the undercut amount is 0.1-0.8 mm, so as to ensure that the sealing ring 2 is well assembled to the upper part and the upper part of the outer side wall of the anti-falling structure 12. The cover body 11 is connected and will not fall off.

Further, the outer side wall of the upper end of the bottle mouth structure 41 of the bottle body 4 is provided with an outer R angle 43 of the bottle, and the inner wall of the upper end of the bottle mouth structure 41 of the bottle body 4 is provided with an inner R angle 44 of the bottle body, and the outer R angle of the bottle 43 and the bottle body. The diameter of the R angle 44 inside the bottle is in the range of 0.2-1.0 mm, and the R angle 43 outside the bottle ensures that the bottle mouth structure 41 will not rub against the inner side wall of the upper cover body 11 and cause the upper cover cover body 11 or the bottle mouth structure. The surface of 41 is scratched, and the R angle 44 in the bottle body ensures that the bottle mouth structure 41 will not crush the sealing ring 2 during sealing. At the same time, it can increase the amount of sealing interference, so that a better sealing effect can be achieved. The R angle design should not be too large. If it is too large, the sealing effect will be deteriorated. The design of the R angle 43 on the outside of the bottle and the R angle 44 on the inside of the bottle can also prevent the bottle body 4 from cracking due to excessive stress during the production of the bottle body. .

Further, the value of the gap between the outer side wall of the anti-shedding structure 12 and the inner side wall of the bottle mouth structure 41 is A, the roundness formed by the outer wall of the bottle mouth structure 41 is B, the diameter of the sealing ring 2 is C, and the diameter of the sealing ring 2 is C. The diameter is the diameter of the circular cross-section of the sealing ring 2. When C≥A+B is satisfied, when the roundness of the bottle mouth structure 41 of the bottle body 4 is relatively poor, the sealing ring 2 can also play a comparative role due to its own elasticity. Good sealing effect, the sealing effect can also be achieved.

Further, the material of the sealing ring 2 is a soft elastic material, such as a soft elastic material such as solid silica gel, liquid silica gel or soft plastic.

Further, the lower end surface of the side wall of the upper cover body 11 is provided with a tearing C-ring 5. In the state where the bottle cap 1 and the bottle body 4 are assembled, the tearing C-ring 5 is located on the outer side of the lower part of the bottle mouth structure 41 and is torn off. The lower end of the split C ring 5 abuts against the connection between the bottle mouth structure 41 and the bottle body 4 .

Further, the inner side wall of the upper cover body 11 is provided with an upper cover thread 15, and the outer side wall of the bottle mouth structure 41 is provided with a bottle mouth thread 42. When the bottle cap 1 is twisted, the upper cover thread 15 is matched with the bottle mouth thread 42. , so that the bottle cap 1 can only move up or down along the axis of the bottle body 4 .

Further, a desiccant positioning device 3 is also provided inside the upper cover body 11 . The desiccant positioning device 3 is located in the inner side wall of the anti-falling structure 12 and is integrally formed with the upper cover body 11 , and the desiccant positioning device 3 cooperates. As for the desiccant, the desiccant can be directly clamped with the desiccant positioning device 3, and the water vapor in the bottle body 4 can be directly contacted, which has a better effect of moisture absorption and drying.

Beneficial effects of the present invention: The present invention is based on the existing interference fit sealing, and designs a circular sealing ring 2 in cross section, which is in contact with the upper end of the inner side wall of the bottle mouth structure 41 of the bottle body 4 for sealing, not only It solves the problem of poor interference fit sealing effect, and also solves the problem that the square sealing ring 2 is easy to fall off, and also solves the problem that the square sealing ring 2 is easy to be twisted and deformed. , can also be well sealed.

Description of drawings

FIG. 1 is a schematic structural diagram of the traditional sealing effect of the sealing structure of the bottle body and the bottle cap of the present invention.

FIG. 2 is a schematic structural diagram of the traditional sealing shedding effect of the sealing structure of the bottle body and the bottle cap of the present invention.

3 is a schematic structural diagram of the traditional sealing deformation effect of the sealing structure of the bottle body and the bottle cap of the present invention.

4 is a schematic structural diagram of the traditional sealing deformation effect of the sealing structure of the bottle body and the bottle cap of the present invention.

5 is a schematic diagram of the overall structure of the sealing structure of the bottle body and the bottle cap of the present invention.

6 is a schematic diagram of the split structure of the sealing structure of the bottle body and the bottle cap of the present invention.

7 is a schematic diagram of the overall structure of the connection between the bottle body and the bottle cap of the present invention.

FIG. 8 is a detailed structural schematic diagram of the sealing structure of the bottle body and the bottle cap of the present invention.

Description of main component symbols

The following specific embodiments will further illustrate the present invention with reference to the above drawings.

Detailed ways

Specific embodiment 1:

As shown in Figure 5, it is a schematic diagram of the overall structure of the sealing structure of the bottle body and the bottle cap of the present invention. As shown in Figure 6, it is a schematic diagram of the split structure of the sealing structure of the bottle body and the bottle cap of the present invention; as shown in Figure 7 Figure 8 is a schematic diagram of the overall structure of the connection between the bottle body and the bottle cap of the present invention; Figure 8 is a detailed structural schematic diagram of the sealing structure of the bottle body and the bottle cap of the present invention.

A sealing structure of a bottle body and a bottle cap, comprising: a bottle cap 1, a sealing ring 2 and a bottle body 4, the bottle cap 1 includes: an upper cover body 11 and an anti-falling structure 12, the bottle cap 1 and the bottle body 4 It is characterized in that: the inside of the upper cover body 11 is provided with an anti-shedding structure 12, and an accommodation chamber 14 is formed between the inner wall of the upper cover body 11 and the outer wall of the anti-falling structure 12, and the sealing ring 2 is located in the The connection between the outer wall of the anti-falling structure 12 and the upper inner wall of the upper cover body 11 is placed in the accommodating chamber 14, the cross section of the sealing ring 2 is circular, and the upper part of the bottle body 4 is provided with a bottle mouth structure 41. The bottle mouth structure 41 is located in the accommodating chamber 14 and the inner wall of the bottle mouth structure 41 is abutted against the outer edge of the sealing ring 2, and the upper cover body 11 can completely cover the bottle mouth structure 41; the sealing ring 2 is made of soft elastic material; the sealing ring The inner diameter of 2 is 0-0.5 mm smaller than the diameter of the circle formed by the outer side wall of the anti-falling structure 12; the outer diameter of the sealing ring 2 is 0.3-1.0 mm larger than the diameter of the inner side wall of the bottle mouth structure 41; the lower part of the outer side wall of the anti-falling structure 12 There is an integrally formed inversion structure 13, and the range of the inversion amount is 0.1-0.8 mm; the outer side wall of the upper end of the bottle mouth structure 41 of the bottle body 4 is provided with an R angle 43 outside the bottle body, and the upper end of the bottle mouth structure 41 of the bottle body 4 is provided. The inner side wall is provided with an R angle 44 inside the bottle, and the diameters of the R angle 43 outside the bottle and the R angle 44 inside the bottle are both 0.2 to 1.0 mm; The gap value is A, the roundness formed by the outer side wall of the bottle mouth structure 41 is B, the diameter of the sealing ring 2 is C, and the diameter of the sealing ring 2 is the diameter of the circular cross-section of the sealing ring 2, and when C≥A+B is satisfied , when the roundness of the bottle mouth structure 41 of the bottle body 4 is relatively poor, the sealing ring 2 can also play a relatively good sealing effect due to its own elastic effect, and the sealing effect can also be achieved.

The lower end surface of the side wall of the upper cover body 11 is provided with a tearing C-ring 5. When the bottle cap 1 and the bottle body 4 are assembled, the tearing C-ring 5 is located on the outer side of the lower part of the bottle mouth structure 41 and is torn. The lower end of the C-ring 5 abuts against the connection between the bottle mouth structure 41 and the bottle body 4 .

The inner side wall of the upper cover body 11 is provided with an upper cover thread 15, and the outer side wall of the bottle mouth structure 41 is provided with a bottle mouth thread 42. When the bottle cap 1 is twisted, the upper cover thread 15 is matched with the bottle mouth thread 42. So that the bottle cap 1 can only move up or down along the axis of the bottle body 4 .

The upper cover body 11 is also provided with a desiccant positioning device 3. The desiccant positioning device 3 is located in the inner side wall of the anti-shedding structure 12 and is integrally formed with the upper cover body 11. The desiccant positioning device 3 is used for drying. If the desiccant is used, the desiccant can be directly connected to the desiccant positioning device 3 .

Specific embodiment 2:

As shown in Figure 5, it is a schematic diagram of the overall structure of the sealing structure of the bottle body and the bottle cap of the present invention. As shown in Figure 6, it is a schematic diagram of the split structure of the sealing structure of the bottle body and the bottle cap of the present invention; as shown in Figure 7 Figure 8 is a schematic diagram of the overall structure of the connection between the bottle body and the bottle cap of the present invention; Figure 8 is a detailed structural schematic diagram of the sealing structure of the bottle body and the bottle cap of the present invention.

A sealing structure of a bottle body and a bottle cap, comprising: a bottle cap 1, a sealing ring 2 and a bottle body 4, the bottle cap 1 includes: an upper cover body 11 and an anti-falling structure 12, the bottle cap 1 and the bottle body 4 It is characterized in that: the inside of the upper cover body 11 is provided with an anti-shedding structure 12, and an accommodation chamber 14 is formed between the inner wall of the upper cover body 11 and the outer wall of the anti-falling structure 12, and the sealing ring 2 is located in the The connection between the outer wall of the anti-falling structure 12 and the upper inner wall of the upper cover body 11 is placed in the accommodating chamber 14, the cross section of the sealing ring 2 is circular, and the upper part of the bottle body 4 is provided with a bottle mouth structure 41. The bottle mouth structure 41 is located in the accommodating chamber 14 and the inner wall of the bottle mouth structure 41 is against the outer edge of the sealing ring 2, and the upper cover body 11 can completely cover the bottle mouth structure 41; the sealing ring 2 is made of solid silica gel; The inner diameter is 0-0.5mm smaller than the diameter of the circle formed by the outer wall of the anti-falling structure 12; the outer diameter of the sealing ring 2 is 0.3-1.0 mm larger than the diameter of the inner wall of the bottle mouth structure 41; the lower part of the outer wall of the anti-falling structure 12 is provided with The integrally formed undercut structure 13 has an undercut amount ranging from 0.1 to 0.8 mm; the outer side wall of the upper end of the bottle mouth structure 41 of the bottle body 4 is provided with an R angle 43 outside the bottle body, and the inner side of the upper end of the bottle mouth structure 41 of the bottle body 4 The wall is provided with an R angle 44 inside the bottle, and the diameters of the R angle 43 outside the bottle and the R angle 44 inside the bottle are both 0.2 to 1.0 mm; is A, the roundness formed by the outer wall of the bottle mouth structure 41 is B, the diameter of the sealing ring 2 is C, and the diameter of the sealing ring 2 is the diameter of the circular cross-section of the sealing ring 2, when C≥A+B is satisfied, when When the roundness of the bottle mouth structure 41 of the bottle body 4 is relatively poor, the sealing ring 2 can also play a relatively good sealing effect due to its own elastic effect, and the sealing effect can also be achieved.

The lower end surface of the side wall of the upper cover body 11 is provided with a tearing C-ring 5. When the bottle cap 1 and the bottle body 4 are assembled, the tearing C-ring 5 is located on the outer side of the lower part of the bottle mouth structure 41 and is torn. The lower end of the C-ring 5 abuts against the connection between the bottle mouth structure 41 and the bottle body 4 .

The inner side wall of the upper cover body 11 is provided with an upper cover thread 15, and the outer side wall of the bottle mouth structure 41 is provided with a bottle mouth thread 42. When the bottle cap 1 is twisted, the upper cover thread 15 is matched with the bottle mouth thread 42. So that the bottle cap 1 can only move up or down along the axis of the bottle body 4 .

The upper cover body 11 is also provided with a desiccant positioning device 3. The desiccant positioning device 3 is located in the inner side wall of the anti-shedding structure 12 and is integrally formed with the upper cover body 11. The desiccant positioning device 3 is used for drying. If the desiccant is used, the desiccant can be directly connected to the desiccant positioning device 3 .

Specific embodiment 3:

As shown in Figure 5, it is a schematic diagram of the overall structure of the sealing structure of the bottle body and the bottle cap of the present invention. As shown in Figure 6, it is a schematic diagram of the split structure of the sealing structure of the bottle body and the bottle cap of the present invention; as shown in Figure 7 Figure 8 is a schematic diagram of the overall structure of the connection between the bottle body and the bottle cap of the present invention; Figure 8 is a detailed structural schematic diagram of the sealing structure of the bottle body and the bottle cap of the present invention.

A sealing structure of a bottle body and a bottle cap, comprising: a bottle cap 1, a sealing ring 2 and a bottle body 4, the bottle cap 1 includes: an upper cover body 11 and an anti-falling structure 12, the bottle cap 1 and the bottle body 4 It is characterized in that: the inside of the upper cover body 11 is provided with an anti-shedding structure 12, and an accommodation chamber 14 is formed between the inner wall of the upper cover body 11 and the outer wall of the anti-falling structure 12, and the sealing ring 2 is located in the The connection between the outer wall of the anti-falling structure 12 and the upper inner wall of the upper cover body 11 is placed in the accommodating chamber 14, the cross section of the sealing ring 2 is circular, and the upper part of the bottle body 4 is provided with a bottle mouth structure 41. The bottle mouth structure 41 is located in the accommodating chamber 14 and the inner wall of the bottle mouth structure 41 is against the outer edge of the sealing ring 2, and the upper cover body 11 can completely cover the bottle mouth structure 41; the sealing ring 2 is made of liquid silica gel; The inner diameter is 0-0.5mm smaller than the diameter of the circle formed by the outer wall of the anti-falling structure 12; the outer diameter of the sealing ring 2 is 0.3-1.0 mm larger than the diameter of the inner wall of the bottle mouth structure 41; the lower part of the outer wall of the anti-falling structure 12 is provided with The integrally formed undercut structure 13 has an undercut amount ranging from 0.1 to 0.8 mm; the outer side wall of the upper end of the bottle mouth structure 41 of the bottle body 4 is provided with an R angle 43 outside the bottle body, and the inner side of the upper end of the bottle mouth structure 41 of the bottle body 4 The wall is provided with an R angle 44 inside the bottle, and the diameters of the R angle 43 outside the bottle and the R angle 44 inside the bottle are both 0.2 to 1.0 mm; is A, the roundness formed by the outer wall of the bottle mouth structure 41 is B, the diameter of the sealing ring 2 is C, and the diameter of the sealing ring 2 is the diameter of the circular cross-section of the sealing ring 2, when C≥A+B is satisfied, when When the roundness of the bottle mouth structure 41 of the bottle body 4 is relatively poor, the sealing ring 2 can also play a relatively good sealing effect due to its own elastic effect, and the sealing effect can also be achieved.

The lower end surface of the side wall of the upper cover body 11 is provided with a tearing C-ring 5. When the bottle cap 1 and the bottle body 4 are assembled, the tearing C-ring 5 is located on the outer side of the lower part of the bottle mouth structure 41 and is torn. The lower end of the C-ring 5 abuts against the connection between the bottle mouth structure 41 and the bottle body 4 .

The inner side wall of the upper cover body 11 is provided with an upper cover thread 15, and the outer side wall of the bottle mouth structure 41 is provided with a bottle mouth thread 42. When the bottle cap 1 is twisted, the upper cover thread 15 is matched with the bottle mouth thread 42. So that the bottle cap 1 can only move up or down along the axis of the bottle body 4 .

The upper cover body 11 is also provided with a desiccant positioning device 3. The desiccant positioning device 3 is located in the inner side wall of the anti-shedding structure 12 and is integrally formed with the upper cover body 11. The desiccant positioning device 3 is used for drying. If the desiccant is used, the desiccant can be directly connected to the desiccant positioning device 3 .

Specific embodiment 4:

As shown in Figure 5, it is a schematic diagram of the overall structure of the sealing structure of the bottle body and the bottle cap of the present invention. As shown in Figure 6, it is a schematic diagram of the split structure of the sealing structure of the bottle body and the bottle cap of the present invention; as shown in Figure 7 Figure 8 is a schematic diagram of the overall structure of the connection between the bottle body and the bottle cap of the present invention; Figure 8 is a detailed structural schematic diagram of the sealing structure of the bottle body and the bottle cap of the present invention.

A sealing structure of a bottle body and a bottle cap, comprising: a bottle cap 1, a sealing ring 2 and a bottle body 4, the bottle cap 1 includes: an upper cover body 11 and an anti-falling structure 12, the bottle cap 1 and the bottle body 4 It is characterized in that: the inside of the upper cover body 11 is provided with an anti-shedding structure 12, and an accommodation chamber 14 is formed between the inner wall of the upper cover body 11 and the outer wall of the anti-falling structure 12, and the sealing ring 2 is located in the The connection between the outer wall of the anti-falling structure 12 and the upper inner wall of the upper cover body 11 is placed in the accommodating chamber 14, the cross section of the sealing ring 2 is circular, and the upper part of the bottle body 4 is provided with a bottle mouth structure 41. The bottle mouth structure 41 is located in the accommodating chamber 14 and the inner wall of the bottle mouth structure 41 abuts against the outer edge of the sealing ring 2, the upper cover body 11 can completely cover the bottle mouth structure 41; the sealing ring 2 is made of soft plastic; the sealing ring 2 The inner diameter of the sealing ring 2 is 0-0.5mm smaller than the diameter of the circle formed by the outer wall of the anti-falling structure 12; the outer diameter of the sealing ring 2 is 0.3-1.0 mm larger than the diameter of the inner wall of the bottle mouth structure 41; the lower part of the outer wall of the anti-falling structure 12 is provided with There is an integrally formed inversion structure 13, and the range of the inversion amount is 0.1-0.8 mm; the outer wall of the upper end of the bottle mouth structure 41 of the bottle body 4 is provided with an R angle 43 outside the bottle body, and the upper end of the bottle mouth structure 41 of the bottle body 4 is provided. The inner side wall is provided with an R angle 44 inside the bottle, and the diameters of the R angle 43 outside the bottle and the R angle 44 inside the bottle are both 0.2 to 1.0 mm; The value is A, the roundness formed by the outer side wall of the bottle mouth structure 41 is B, the diameter of the sealing ring 2 is C, and the diameter of the sealing ring 2 is the diameter of the circular cross-section of the sealing ring 2. When C≥A+B is satisfied, When the roundness of the bottle mouth structure 41 of the bottle body 4 is relatively poor, the sealing ring 2 can also play a relatively good sealing effect due to its own elastic effect, and the sealing effect can also be achieved.

The lower end surface of the side wall of the upper cover body 11 is provided with a tearing C-ring 5. When the bottle cap 1 and the bottle body 4 are assembled, the tearing C-ring 5 is located on the outer side of the lower part of the bottle mouth structure 41 and is torn. The lower end of the C-ring 5 abuts against the connection between the bottle mouth structure 41 and the bottle body 4 .

The inner side wall of the upper cover body 11 is provided with an upper cover thread 15, and the outer side wall of the bottle mouth structure 41 is provided with a bottle mouth thread 42. When the bottle cap 1 is twisted, the upper cover thread 15 is matched with the bottle mouth thread 42. So that the bottle cap 1 can only move up or down along the axis of the bottle body 4 .

The upper cover body 11 is also provided with a desiccant positioning device 3. The desiccant positioning device 3 is located in the inner side wall of the anti-shedding structure 12 and is integrally formed with the upper cover body 11. The desiccant positioning device 3 is used for drying. If the desiccant is used, the desiccant can be directly connected to the desiccant positioning device 3 .

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the patent of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the appended claims.

Claims (10)

1. A sealing structure for a bottle body and a bottle cap, comprising: a bottle cap (1), a sealing ring (2) and a bottle body (4), the bottle cap (1) comprising: an upper cover body (11) and an anti-fall off Structure (12), the bottle cap (1) is screwed with the bottle body (4); it is characterized in that: the upper cover cover body (11) is provided with an anti-falling structure (12), the upper cover cover body ( 11) An accommodation chamber (14) is formed between the inner side wall and the outer side wall of the anti-falling structure (12), and the sealing ring (2) is located at the connection between the outer wall of the anti-falling structure (12) and the upper inner wall of the upper cover body (11). and placed in the accommodating chamber (14), the cross section of the sealing ring (2) is circular, the bottle body (4) is provided with a bottle mouth structure (41) on the upper part, and the bottle mouth structure (41) is located in the accommodating chamber In (14) and the inner wall of the bottle mouth structure (41) abuts against the outer edge of the sealing ring (2), the upper cover body (11) can completely cover the bottle mouth structure (41). 2. The sealing structure of the bottle body and the bottle cap according to claim 1, wherein the inner diameter of the sealing ring (2) is 0-0.5 mm smaller than the diameter of the circle formed by the outer wall of the anti-falling structure (12). . 3. The sealing structure of the bottle body and the bottle cap according to claim 1, wherein the outer diameter of the sealing ring (2) is 0.3-1.0 mm larger than the inner side wall diameter of the bottle mouth structure (41). 4. The sealing structure of the bottle body and the bottle cap according to claim 1, characterized in that: the lower part of the outer side wall of the anti-shedding structure (12) is provided with an integrally formed undercut structure (13), and the range of the undercut amount is 0.1～0.8mm. 5. The sealing structure of the bottle body and the bottle cap according to claim 1, characterized in that: the outer side wall of the upper end of the bottle mouth structure (41) of the bottle body (4) is provided with an R angle (43) outside the bottle body. (4) The inner wall of the upper end of the bottle mouth structure (41) is provided with an R angle (44) inside the bottle, and the diameters of the R angle (43) outside the bottle and the R angle (44) in the bottle are both 0.2-1.0 mm. 6. The sealing structure of the bottle body and the bottle cap as claimed in claim 1, characterized in that: the value of the gap between the outer sidewall of the anti-shedding structure (12) and the inner sidewall of the bottle mouth structure (41) is A, and the bottle mouth The roundness formed by the outer side wall of the structure (41) is B, the diameter of the sealing ring (2) is C, and the diameter of the sealing ring (2) is the diameter of the circular cross-section of the sealing ring (2), satisfying C≥A+B . 7. The sealing structure of the bottle body and the bottle cap according to claim 1, wherein the material of the sealing ring (2) is a soft elastic material. 8. The sealing structure of the bottle body and the bottle cap according to claim 1, characterized in that: the lower end surface of the side wall of the upper cover cover body (11) is provided with a tearing C-ring (5), and the When the bottle body (4) is assembled, the tearing C-ring (5) is located on the outer side of the lower part of the bottle mouth structure (41) and the lower end of the tearing C-ring (5) is connected with the bottle mouth structure (41) and the bottle body (41). 4) The joints are against each other. 9. The sealing structure of the bottle body and the bottle cap according to claim 1, characterized in that: the inner side wall of the upper cover cover body (11) is provided with an upper cover thread (15), and the outer side wall of the bottle mouth structure (41) is provided with an upper cover thread (15). There are bottle opening threads (42), and when the bottle cap (1) is screwed, the upper cap threads (15) are matched with the bottle opening threads (42). 10. The sealing structure of the bottle body and the bottle cap according to claim 1, characterized in that: a desiccant positioning device (3) is further provided inside the upper cover (11), and the desiccant positioning device (3) It is located in the inner side wall of the anti-falling structure (12) and is integrally formed with the upper cover body (11).

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