Angle measuring device
By designing an angle measuring device including a measuring part, a fixing part and a rotating mechanism, the measurement inaccuracy problem caused by the different shafts of the angle gauge and the bottle cap in the prior art is solved, and a more accurate measurement of the bottle cap rotation angle is achieved.
Patent Information
- Application Number
- CN202421415521.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-06-20
AI Technical Summary
In the prior art, when measuring the rotation angle of the bottle cap with respect to the bottle opening, it is difficult to ensure that the angle gauge and the bottle cap are in a coaxial position, resulting in inaccurate measurement results.
An angle measuring device is designed, including a measuring part, a fixing part and a rotating mechanism. By uniformly providing a plurality of rotation shafts and abutment members inside the fixing member, the rotation assembly is used to drive the rotation shaft and abutment members to rotate about the Y-axis, so that the abutment members abut the outer circumference of the bottle mouth, thereby ensuring that the measuring member is coaxial with the bottle cap.
By making the abutting member abutting on the outer periphery of the bottle mouth, the fixing member is coaxial with the bottle mouth, the measuring member is coaxial with the fixing member, and the bottle cap is coaxial with the bottle mouth, so the measuring member is also coaxial with the bottle cap, thereby improving the accuracy of the measurement results.
Smart Images
Figure CN222560874U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bottle cap sealing, in particular to an angle measuring device. Background Art
[0002] In the bottle packaging liquid industry, it is necessary to test the sealing of the bottle cap after the bottle is filled with liquid. The test method is to measure the rotation angle of the bottle cap relative to the bottle mouth. When the rotation angle meets the specified range, it is proved that the bottle cap sealing meets the standard; in addition, the torque required to open the bottle cap can also be inferred from the actual rotation angle.
[0003] At present, the rotation angle of the bottle cap relative to the bottle mouth is measured by an angle gauge. During use, the angle gauge needs to be placed on the outer circumference of the bottle cap and the bottle cap is screwed to read the screwing angle of the bottle cap. However, in this process, it is difficult to ensure that the angle gauge and the bottle cap are in the same axial position, which leads to inaccurate measurement results.
[0004] Therefore, there is an urgent need for an angle measuring device to ensure that the device can remain coaxial with the bottle cap during the measurement process, so that the measurement result is more accurate. Utility Model Content
[0005] The utility model aims to provide an angle measuring device to ensure that the device can keep coaxial with the bottle cap during the measuring process, so as to make the measuring result more accurate.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] An angle measuring device for measuring the rotation angle of a bottle cap relative to a bottle mouth, comprising:
[0008] The measuring piece has a surface with marking angles arranged along the circumferential direction;
[0009] A fixing member can be sleeved on the outer circumference of the bottle mouth, and the measuring member is arranged on the top of the fixing member and is coaxial with the fixing member;
[0010] A rotating mechanism is arranged inside the fixing member, the rotating mechanism includes a rotating assembly, a rotating shaft, and an abutment member, at least three rotating shafts are evenly arranged along the circumference of the fixing member, at least three rotating shafts are perpendicular to the fixing member and are pivotally connected, at least three rotating shafts are connected to the abutment member, and the rotating assembly is configured to be able to drive at least three rotating shafts and simultaneously drive the abutment member connected thereto to rotate around the Y axis, so that at least three abutment members abut against the outer periphery of the bottle mouth at the same time, so that the measuring member and the bottle cap are coaxial.
[0011] Preferably, the rotating assembly includes a rotating part, a synchronous wheel and a synchronous belt, the rotating part is connected to the outer periphery of one of the rotating shafts, adjacent rotating shafts are connected through the synchronous wheel and the synchronous belt, and the rotating shaft connected to the rotating part is only connected to one rotating shaft that is not connected to the rotating part, so that when the rotating part is rotated around the Y axis, at least three rotating shafts can rotate around the Y axis at the same time.
[0012] Preferably, six rotating shafts are provided, and the six rotating shafts are evenly arranged along the circumference of the fixing member; three abutment members are provided, and the three abutment members are evenly arranged along the circumference of the fixing member and connected to the rotating shafts.
[0013] Preferably, the rotating member is connected to the rotating shaft to which the abutment member is not connected.
[0014] Preferably, a first handle is provided at one end of the rotating member away from the rotating shaft, and a avoidance hole is provided on the side wall of the fixing member, and the first handle can extend out of the avoidance hole and rotate in the avoidance hole.
[0015] Preferably, a first marking point is provided on the bottle cap, a second marking point is provided on the bottle mouth, the marking angle is provided on the top surface of the measuring piece, a side of the measuring piece close to the bottle cap is an inclined surface, and the first marking point and the second marking point can respectively correspond to an angle value of the marking angle.
[0016] Preferably, the inclined surface is a mirror surface.
[0017] Preferably, the measuring piece is semicircular as a whole, and the marking angle ranges from 0° to 180°.
[0018] Preferably, the side wall of the fixing member is further provided with a second handle, and the second handle is opposite to the marking angle of 0°.
[0019] Preferably, the abutment member has an abutment arc surface on one side close to the bottle cap.
[0020] Beneficial effects of the utility model:
[0021] The utility model discloses an angle measuring device, which includes a measuring piece, a fixing piece and a rotating mechanism. The fixing piece can be sleeved on the outer periphery of the bottle mouth, and the measuring piece is arranged at the top of the fixing piece and is coaxial with the fixing piece; the rotating mechanism includes a rotating assembly, a rotating shaft, and an abutting piece, at least three rotating shafts are evenly arranged along the circumference of the fixing piece, at least three rotating shafts are perpendicular to the fixing piece and are pivotally connected, at least three rotating shafts are connected with the abutting piece, and the rotating assembly is configured to be able to drive at least three rotating shafts and drive the abutting piece connected thereto to rotate around the Y axis at the same time, so that at least three abutting pieces abut against the outer periphery of the bottle mouth at the same time, so that the measuring piece and the bottle cap are coaxial. During the measurement process, by making at least three abutting pieces abut against the outer periphery of the bottle mouth, it is possible to ensure that the fixing piece and the bottle mouth are coaxial, and the measuring piece and the fixing piece are coaxially arranged, and the bottle cap and the bottle mouth are coaxially arranged, so the measuring piece and the bottle cap are also coaxially arranged, thereby ensuring the accuracy of the measurement result. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is an axonometric diagram of the angle measuring device provided by the utility model;
[0023] Figure 2 It is a structural schematic diagram of the bottle cap and bottle mouth provided by the utility model;
[0024] Figure 3 It is a structural schematic diagram of the angle measuring device provided by the utility model.
[0025] In the figure:
[0026] 10. measuring piece; 11. inclined surface; 12. top surface;
[0027] 20. Fixing piece; 21. Avoidance hole; 22. Second handle; 23. Connecting piece
[0028] 30. Rotating mechanism; 31. Rotating assembly; 311. Rotating member; 312. Synchronous wheel; 313. Synchronous belt; 314. First handle; 32. Rotating shaft; 33. Abutting member;
[0029] 100. bottle cap; 110. first identification point;
[0030] 200. Bottle mouth; 210. Second identification point. DETAILED DESCRIPTION
[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.
[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0033] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0034] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0035] First, if Figure 1-Figure 3 As shown, this embodiment provides an angle measuring device for measuring the rotation angle of the bottle cap 100 relative to the bottle mouth 200 . The device comprises a measuring piece 10, a fixing piece 20 and a rotating mechanism 30; wherein the surface of the measuring piece 10 is provided with a marking angle along the circumferential direction; the fixing piece 20 can be sleeved on the outer periphery of the bottle mouth 200, the measuring piece 10 is arranged at the top end of the fixing piece 20 and is coaxial with the fixing piece 20; the rotating mechanism 30 is arranged inside the fixing piece 20, the rotating mechanism 30 comprises a rotating assembly 31, a rotating shaft 32 and an abutting piece 33, at least three rotating shafts 32 are evenly arranged along the axial direction of the fixing piece 20, at least three rotating shafts 32 are perpendicular to the fixing piece 20 and are pivotally connected, at least three rotating shafts 32 are connected with the abutting piece 33, the rotating assembly 31 is configured to be able to drive at least the rotating shaft 32 and simultaneously drive the abutting piece 33 connected thereto to rotate around the Y axis (that is, the axis of the rotating shaft 32), so that at least three abutting pieces 33 abut against the outer periphery of the bottle mouth 200 at the same time, so that the measuring piece 10 is coaxial with the bottle cap 100.
[0036] By evenly arranging the plurality of rotating shafts 32 along the circumferential direction inside the fixing member 20, it can be ensured that the regular polygon surrounded by the plurality of rotating shafts 32 can be coaxial with the fixing member 20; secondly, since the plurality of rotating shafts 32 are pivotally connected to the fixing member 20, and the abutting member 33 can rotate together with the rotating shaft 32, therefore, when the fixing member 20 is sleeved on the outer periphery of the bottle mouth 200 and the bottle mouth 200 is not coaxial with the fixing member 20, the rotating assembly 31 can drive the plurality of abutting members 33 to rotate toward the bottle mouth 200 through the rotating shaft 32, and the plurality of abutting members 33 abut against the bottle mouth 200 and push the bottle mouth 200 to move in the direction of force balance (that is, the regular polygon surrounded by the plurality of rotating shafts 32 is coaxial with the bottle mouth 200). At this time, since the regular polygon surrounded by the plurality of rotating shafts 32 is coaxial with the fixing member 20, it is ensured that the fixing member 20 can be coaxial with the bottle mouth 200, that is, the measuring member 10 is coaxial with the bottle cap 100, thereby ensuring the accuracy of the measurement result.
[0037] It should be noted here that the Y axis is also the axis of the rotation shaft 32. Since the rotation shaft 32 is perpendicular to the inner bottom surface of the fixing member 20, the axis is parallel to the axis of the bottle cap 100 or the bottle mouth 200. To ensure that when the bottle mouth 200 is not coaxial with the fixing member 20, the plurality of abutting members 33 can smoothly push the bottle mouth 200 to a position coaxial with the fixing member 20, such as Figure 3 As shown, the side of the abutting member 33 close to the bottle cap 100 has an abutting arc surface. This structure can make the process of abutting and pushing the bottle mouth 200 to be coaxial with the fixing member 20 smoother, thereby ensuring a good use effect. It is further explained that the measuring member 10 is detachably connected to the top of the fixing member 20 through the connecting member 23, so as to facilitate subsequent maintenance and replacement.
[0038] It is worth noting that at least three abutment members 33 are provided, because providing one or two evenly distributed ones can ensure that the bottle cap 100 or the bottle mouth 200 is coaxial with the measuring member 10; and the multiple rotation axes 32 must be evenly arranged along the circumference of the fixing member 20, that is, the end-to-end connecting line of the multiple rotation axes 32 can form a regular polygon coaxial with the fixing member 20. It is further explained that in this embodiment, if Figure 1 and Figure 2 As shown, the bottle cap 100 is provided with a first identification point 110 and a second identification point 210. When measuring the rotation angle of the bottle cap 100 relative to the bottle mouth 200, it is necessary to align the first identification point 110 and the second identification point 210 with an identification angle on the surface of the measuring piece 10 at the same time, and rotate the bottle cap 100. After the rotation is completed, the identification angle after rotation corresponding to the first identification point 110 is read out, and the rotation angle is obtained according to the number of rotations and the rotation difference. This is simple, convenient and accurate.
[0039] like Figure 1 and Figure 3As shown, in order to ensure the convenience of use of the device, the rotating assembly 31 includes a rotating member 311, a synchronous wheel 312 and a synchronous belt 313. The rotating member 311 is connected to the outer periphery of a rotating shaft 32. Adjacent rotating shafts 32 are connected by transmission through the synchronous wheel 312 and the synchronous belt 313. The rotating shaft 32 connected to the rotating member 311 is only connected by transmission with a rotating shaft 32 that is not connected to the rotating member 311, so that when the rotating member 311 is rotated around the Y axis, at least three rotating shafts 32 can rotate around the Y axis at the same time. Through the synchronous wheel 312 and the synchronous belt 313, the overall structure can be simplified and the use efficiency can be improved. There is no need to set a rotating member 311 on each rotating shaft 32, and it can ensure that at least three rotating shafts 32 can rotate synchronously, avoiding the situation where a part rotates and the other parts do not move, thereby ensuring that the fixed member 20 can be coaxial with the bottle mouth 200, thereby ensuring the accuracy of the result.
[0040] In addition, Figure 3 As shown, six rotating shafts 32 are provided, and the six rotating shafts 32 are evenly arranged along the circumference of the fixing member 20, and three abutment members 33 are provided, and the three abutment members 33 are evenly arranged along the circumference of the fixing member 20 and connected to the rotating shafts 32. The six rotating shafts 32 are located at ( Figure 3 The end-to-end lines of A, B, C, D, E, and F can form a regular hexagon, so three of the rotation axes 32 are selected, and none of the three rotation axes 32 are adjacent to each other ( Figure 3 In Figures B, D, and F), the three abutment members 33 are respectively connected to the three rotating shafts 32, so that the three abutment members 33 are evenly arranged along the circumference of the fixing member 20, and the three abutment members 33 are located at positions where the end and end of the connecting line can form a regular triangle coaxial with the fixing member 20.
[0041] In addition, if Figure 3 As shown, the rotating member 311 is connected to the rotating shaft 32 that is not connected to the abutment member 33. This arrangement can avoid setting too many structures on one rotating shaft 32, which would be inconvenient to install. Figure 3 Only one synchronous wheel 312 is provided on the rotating shaft 32 at the middle A position, and the other five positions ( Figure 3The rotating shaft 32 at the positions B, C, D, E, and F in the figure is provided with two synchronous wheels 312 at intervals along its axial direction, that is, the rotating shaft 32 at the position A is connected to a synchronous wheel 312 at the position B through the synchronous wheel 312 and the synchronous belt 313, so that the rotation effect of the position A can be transmitted to the position B; and when the rotating shaft 32 at the position B rotates, it can drive another synchronous wheel 312 at the position B to rotate, and the synchronous wheel 312 is connected to a synchronous wheel 312 at the position C through the synchronous belt 313, so that the rotation effect of the position B can be transmitted to the position C; the connection relationship between the rotating shaft 32 at the position C and the rotating shaft 32 at the position D, the rotating shaft 32 at the position D and the rotating shaft 32 at the position E, and the rotating shaft 32 at the position E and the rotating shaft 32 at the position F are the same as the connection relationship between A and B, and between B and C mentioned above, which will not be repeated here.
[0042] To ensure that the six rotating shafts 32 can be smoothly driven to rotate by the rotating member 311, Figure 1 As shown, a first handle 314 is provided at one end of the rotating member 311 away from the rotating shaft 32, and a evacuation hole 21 is provided on the side wall of the fixing member 20, and the first handle 314 can extend out of the evacuation hole 21 and rotate in the evacuation hole 21. By providing the first handle 314 at one end of the rotating member 311 away from the rotating shaft 32, the rotation process can be made more labor-saving, thereby improving the test efficiency; in addition, by providing the evacuation hole 21, it can be ensured that the first handle 314 can extend from the inside of the fixing member 20 and can rotate within a certain angle, thereby ensuring a normal use effect.
[0043] For convenience, Figure 1 As shown, the marking angle is set on the top surface 12 of the measuring piece 10, and the side of the measuring piece 10 close to the bottle cap 100 is an inclined surface 11, and the first marking point 110 and the second marking point 210 can respectively face one of the angle values in the marking angle. This structure can more intuitively measure the angle value corresponding to the first marking point 110 or the second marking point 210, thereby avoiding human errors caused by the inconvenience of measuring degrees, thereby ensuring the accuracy of the results.
[0044] It is worth noting that in this embodiment, in order to further ensure the accuracy of the degree, the inclined surface 11 is a mirror surface. Since the inclined surface 11 is directly opposite to the bottle cap 100, the mirror structure of the inclined surface 11 can reflect the first identification point 110 of the bottle cap 100 on the inclined surface 11. Since the inclined surface 11 is connected to the top surface 12, the identification angle corresponding to the reflected first identification point 110 can be directly matched to obtain the actual rotation angle, which is not only simple and convenient, but also more accurate in degree, thereby ensuring the accuracy of the measurement result.
[0045] It should be noted that, in this embodiment, the rotation angle of the bottle cap 100 relative to the bottle mouth 200 is between 360° and 540°, that is, the bottle cap 100 can rotate one to one and a half circles relative to the bottle mouth 200. Figure 1 As shown, the measuring piece 10 is semicircular as a whole, and the range of the marking angle is 0°-180°. At the same time, for the convenience of calculation, the first marking point 110 and the second marking point 210 need to be aligned with the starting measuring point (0° position) of the measuring piece 10 when in use. Since the rotation angle of the bottle cap 100 relative to the bottle mouth 200 is between 360°-540°, after the rotation is completed, the first marking point 110 will fall within the range of 0°-180°. At this time, the corresponding value is read through the inclined surface 11, and finally this value is added 360° to obtain the actual rotation angle of the bottle cap 100 relative to the bottle mouth 200. This structure can reduce the manufacturing cost of the measuring piece 10, and at the same time facilitate the degree and calculation.
[0046] In addition, if Figure 1 As shown, the side wall of the fixing member 20 is also designed with a second handle 22, and the second handle 22 is opposite to the starting measuring point (0° position) of the measuring member 10. By providing the second handle 22, the second handle 22 can be held when the first handle 314 is rotated, which can improve the convenience of use. At the same time, since the second handle 22 is provided at a position opposite to the starting measuring point (0° position) of the measuring member 10, it is more convenient to read the value. It is worth noting that Figure 1 As shown, the measuring piece 10 and the first handle 314 are respectively arranged on the left and right sides of the second handle 22, so as to ensure the aesthetics of the overall structure; and there is a certain angle between the first handle 314 and the second handle 22, so as to ensure that when the first handle 314 is rotated, there will be no interference with the second handle 22, thereby improving the convenience of use.
[0047] Finally, the use process of the angle measuring device in this embodiment is described with reference to the accompanying drawings:
[0048] First, the fixing member 20 is sleeved on the outer periphery of the bottle mouth 200, the second handle 22 is held, and the first handle 314 is rotated to make the bottle cap 100 and the measuring member 10 coaxial;
[0049] Secondly, the fixing member 20 is rotated around the Y axis so that the second marking point 210 of the bottle mouth 200 is aligned with the starting measuring point (0° position) of the measuring member 10, and the first marking point 110 of the bottle cap 100 is aligned with the second marking point 210;
[0050] Secondly, screw the bottle cap 100 until the bottle cap 100 is locked at the bottle mouth 200;
[0051] Secondly, through mirror reflection, the value of the identification angle corresponding to the first identification point 110 is read out, and 360° is added to this value to obtain the actual rotation angle;
[0052] Finally, the actual rotation angle is compared with the standard sealing angle to determine whether the bottle cap 100 meets the sealing standard.
[0053] In summary, the angle measuring device in this embodiment can not only solve the problem that the measuring member 10 cannot be coaxial with the bottle cap 100, but also makes reading more convenient, thereby ensuring the accuracy of the measurement result.
[0054] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.
Claims
1. An angle measuring device for measuring the rotation angle of a bottle cap (100) relative to a bottle mouth (200), characterized in that: include: A measuring piece (10) having a surface provided with marking angles along the circumferential direction; The fixing member (20) can be sleeved on the outer circumference of the bottle mouth (200), and the measuring member (10) is arranged on the top of the fixing member (20) and is coaxial with the fixing member (20); A rotating mechanism (30) is arranged inside the fixing member (20), and the rotating mechanism (30) comprises a rotating assembly (31), a rotating shaft (32), and an abutment member (33). At least three rotating shafts (32) are evenly arranged along the circumference of the fixing member (20), and at least three rotating shafts (32) are perpendicular to and pivotally connected to the fixing member (20). At least three rotating shafts (32) are connected to the abutment member (33). The rotating assembly (31) is configured to be able to drive at least three rotating shafts (32) and simultaneously drive the abutment members (33) connected thereto to rotate around the Y axis, so that at least three abutment members (33) abut against the outer periphery of the bottle mouth (200) at the same time, so that the measuring member (10) and the bottle cap (100) are coaxial.
2. The angle measuring device according to claim 1, characterized in that: The rotating assembly (31) comprises a rotating member (311), a synchronous wheel (312) and a synchronous belt (313); the rotating member (311) is connected to the outer periphery of one rotating shaft (32); adjacent rotating shafts (32) are transmission-connected via the synchronous wheel (312) and the synchronous belt (313); and the rotating shaft (32) connected to the rotating member (311) is transmission-connected only to one rotating shaft (32) not connected to the rotating member (311), so that when the rotating member (311) is rotated around the Y axis, at least three rotating shafts (32) can rotate around the Y axis simultaneously.
3. The angle measuring device according to claim 2, characterized in that: Six rotating shafts (32) are provided, and the six rotating shafts (32) are evenly arranged along the circumference of the fixing member (20); three abutment members (33) are provided, and the three abutment members (33) are evenly arranged along the circumference of the fixing member (20) and connected to the rotating shafts (32).
4. The angle measuring device according to claim 3, characterized in that: The rotating member (311) is connected to the rotating shaft (32) to which the abutting member (33) is not connected.
5. The angle measuring device according to claim 2, characterized in that: A first handle (314) is provided at one end of the rotating member (311) away from the rotating shaft (32), and a evacuation hole (21) is provided on the side wall of the fixing member (20), and the first handle (314) can extend out of the evacuation hole (21) and rotate in the evacuation hole (21).
6. The angle measuring device according to any one of claims 1 to 5, characterized in that: The bottle cap (100) is provided with a first identification point (110), the bottle mouth (200) is provided with a second identification point (220), the identification angle is provided on the top surface (12) of the measuring member (10), a side of the measuring member (10) close to the bottle cap (100) is an inclined surface (11), and the first identification point (110) and the second identification point (220) can respectively face one of the angle values of the identification angle.
7. The angle measuring device according to claim 6, characterized in that: The inclined surface (11) is a mirror surface.
8. The angle measuring device according to any one of claims 1 to 5, characterized in that: The measuring piece (10) is semicircular as a whole, and the marking angle ranges from 0° to 180°.
9. The angle measuring device according to claim 8, characterized in that: The side wall of the fixing member (20) is also provided with a second handle (22), and the second handle (22) is directly opposite to the marking angle of 0°.
10. The angle measuring device according to any one of claims 1 to 5, characterized in that: The side of the abutment member (33) close to the bottle cap (100) has an abutment arc surface.