Convenient locking cover suitable for annular container with open neck

Abstract

In order to solve the problems that a locking cover is large in assembly and production difficulty, the yield is not easy to guarantee and the production cost is high, the top cover comprises two layers of the top cover outer ring and the top cover inner ring which are integrally formed, a plurality of rib positions with very small cross sectional areas are arranged at the joint, tearing and separation can be conveniently carried out, fractures after tearing are controllable, foreign matter cannot occur, the assembly sequence is free, and the assembly efficiency is high. The top cover is easy to assemble, the fracture portion of the tearing structure is controllable and more reliable, the cover body and the top cover are tightly combined, the dustproof effect is better, meanwhile, the outer ring of the top cover and the cover body are buckled through the annular elastic arm, and the locking cover is easy to assemble and high in stability.

Description

[0001] This application is a divisional application of Chinese patent application 202110407701.7, filed on April 15, 2021, entitled "A convenient locking cap for a container with an annular neck opening". Technical Field

[0002] This invention relates to the field of locking cap technology, and more specifically to a convenient locking cap suitable for containers with annular neck openings. Background Technology

[0003] The traditional locking cap sealing method involves putting an aluminum cap over the rubber stopper. This is to protect the rubber stopper, seal the glass bottle well, and also to identify whether it has been used. If it has been used, the aluminum cap will have a hole. Summary of the Invention

[0004] In view of this, in order to solve the problems of high assembly and production difficulty, difficulty in ensuring yield and high production cost of locking cover, the present invention has a top cover consisting of two layers of integrally formed outer and inner rings. The connection is made of several ribs with a small cross-sectional area, which can be easily torn apart. After tearing, the break is controllable and no foreign objects will appear. The assembly sequence is free, the top cover is simple to assemble, and the breakage part of the tearing structure is controllable, which is more reliable. The cover body and the top cover are tightly connected, which has a better dustproof effect. At the same time, the outer ring of the top cover and the cover body are fastened with a ring elastic arm, making the locking cover assembly simple and highly stable.

[0005] A convenient locking cap for a container with an annular neck opening is provided. The locking cap consists of a cover body 100, a rubber stopper 200, a container 400, and a top cover 300. The rubber stopper 200 is placed inside the cover body 100, and the top cover 300 is located on top of the cover body 100. The cover body 100 is sleeved with the neck of the container 400. The cover body 100 is a hollow structure with a central hole 101 at the top center for providing a channel for a syringe needle. The bottom has an open opening 108 for receiving the container 400. Two sets of elastic arms 102 are provided on the inner wall of the cover body 100 to completely fix the rubber stopper 200 between the container 400 and the cover body 100. The two sets of elastic arms 102 are inverted structures. The two sets of elastic arms 102 include an upper elastic arm 103 and a lower elastic arm 104. The upper elastic arm 103 engages with the rubber stopper 200, and the lower elastic arm 104 engages with the neck of the container 400. The top of the cover 100 is provided with a clearance hole 107 corresponding to the position of the elastic arm 102. The top cover 300 is divided into two layers: an inner ring 301 and an outer ring 302. The inner ring 301 is an easy-tear structure layer. The outer ring 302 has a first annular hook 303 extending vertically downward on the outer side. The top outer side of the cover 100 is provided with a second annular hook 109. The first annular hook 303 engages with the second annular hook 109. After the outer ring 302 engages with the cover 100, it forms a sealed whole, achieving the function of side dust prevention and isolation from the outside.

[0006] Furthermore, the center of the inner ring 301 of the top cover is a circular structure with a diameter larger than that of the central hole 101, so that the inner ring 301 of the top cover can cover the central hole 101 set on the top of the cover body 100, thereby achieving the function of dust prevention and isolation from the outside.

[0007] Furthermore, the inner ring 301 of the top cover, the easy-tear structure of the inner ring 301 of the top cover, and the outer ring 302 of the top cover are all on the same plane.

[0008] Furthermore, the several clearance holes 107 of the cover body 100 are arranged in a ring around the center of the central hole 101. The inner diameter of the outer ring 302 of the top cover is smaller than the circumference diameter formed by the clearance holes 107 at the top, so that the outer ring 302 of the top cover can cover all the clearance holes 107 at the top of the cover body 100, thus playing the role of dust prevention and isolation from the outside at the top.

[0009] Furthermore, the circular structure at the center of the inner ring of the top cover shields the central hole 101 at the top of the cover body 100, and the outer ring 302 of the top cover shields all the clearance holes at the top of the cover body 100. At this time, the locking cover completes the shielding of the sides and top, forming a complete isolation from the outside world.

[0010] Furthermore, the upper elastic arm 103 and the lower elastic arm 104 are arranged in a ring, with a quantity of 3-8, preferably 3. The wall thickness of the elastic arm 102 connected to the cover body 100 is greater than the wall thickness of the elastic arm 102 away from the cover body 100. The elastic arm 102 away from the cover body 100 has better elasticity. The dimension of the elastic arm 102 in the width direction is 3-20 times that in the thickness direction, preferably 10 times. The width of the clearance hole 107 is greater than the width of the elastic arm 102 to facilitate mold forming.

[0011] Furthermore, the top cover 300 is made of a plastic material with a certain degree of elasticity. This choice of elastic material allows the outer ring 302 of the top cover to have a certain degree of elasticity. In the free state, the inner diameter of the first annular hook 303 is slightly smaller than the outer diameter of the second annular hook 109. The connection between the first annular hook 303 and the second annular hook 109 is an interference fit or a transition fit. The interference fit or transition fit is used to eliminate the gap caused by assembly tolerance. Generally speaking, in the free state, the gap between the inner diameter of the first annular hook 303 and the outer diameter of the second annular hook 109 is -0.6-0.6mm, and more preferably -0.1mm. When the gap between the outer diameters of the first annular hook 303 and the second annular hook 109 is -0.1mm, the outer diameters of the annular hook 303 of the top cover outer ring 302 and the corresponding outer diameters of the cover body 100 are an interference fit or a transition fit. When the two are assembled together, they can be locked together.

[0012] Furthermore, the locking cover is a locking cover that can be opened with one hand.

[0013] Furthermore, the outer ring 302 of the top cover 300 and the inner ring 301 of the top cover are connected by a group of ribs 308. The group of ribs 308 consists of several ribs 308 with small cross-sectional areas. The strength of the group of ribs 308 is much less than that of the Easyla structural layer 301 and the top cover body layer 302, so that the fracture position is stable and controllable, and no fragmentation or foreign matter will occur. After separation, it breaks into two parts, inner and outer, which cannot be restored. This ensures that the device is for single use. The number of ribs 308 is 4-10, preferably 4. The fracture surface of the ribs 308 is one of rectangle, circle and ellipse, with rectangle being more preferred. The structure is simple and easy to produce. The cross-sectional area of ​​the ribs 308 is 0.02-0.8 mm², preferably 0.56 mm².

[0014] Furthermore, the rib 308 is located on the side of the inner and outer rings of the top cover. When the top cover 300 is engaged with the cover body 100, the downward pressing force will not be transmitted to the rib 308, thus avoiding the risk of the rib 308 being prematurely broken.

[0015] Furthermore, a handle 309 is provided at the extension of the inner ring 301 of the top cover. The width of 309 is 1-5mm, preferably 3mm, to facilitate the user to grip the inner ring 301 and perform tearing action. An opening 310 is provided at the outer ring 302 of the top cover. The handle 309 extends to the opening 310. A third hook 305 extends vertically downward at the end of the handle 309. The third hook 305 engages with the second annular hook 109. The width of the handle 309 is slightly smaller than the width at the opening 310.

[0016] After the inner and outer rings of the top cover 300 break, the top opening of the cover body 100 is removed. At this time, an instrument such as a syringe can be used to pierce the rubber stopper 200 and take out the medicine in the container 400.

[0017] Furthermore, the rubber stopper 200 consists of a stopper head 201 and a stopper body 202. The stopper 200 has an annular structure. The top end of the upper elastic arm 103 engages with the bottom surface of the stopper head 201. The outer diameter a of the stopper head 201 is larger than the diameter b of the circle formed by the top ends of the upper elastic arm 103. The diameter b of the circle formed by the top ends of the upper elastic arm 103 is larger than the outer diameter c of the lip of the container 400. The outer diameter c of the lip of the container 400 is larger than the diameter d of the circle formed by the top ends of the lower elastic arm 104. The outer diameter a of the stopper head 201 is larger than... The diameter b of the circle formed by the top end of the upper elastic arm 103 ensures that the rubber stopper 400 can be fixed inside the cover body 100 by the upper elastic arm 103. The diameter b of the circle formed by the top end of the upper elastic arm 103 is larger than the outer diameter c of the lip of the container 400, which can prevent the outer edge of the lip of the container 400 from squeezing the upper elastic arm 103 and causing the rubber stopper 200 to fall off. The outer diameter c of the lip of the container 400 is larger than the diameter d of the circle formed by the top end of the lower elastic arm 104, which can ensure that the lower elastic arm 104 can hold the outer edge of the lip of the container 400.

[0018] Furthermore, a connecting surface 306 is provided at the junction of the neck of the container 400 and the body of the container 400, and the top of the lower elastic arm 104 engages with the connecting surface 306.

[0019] Furthermore, the elastic arm 102 includes a first assembly surface 105 and a first engagement surface 106. The angle between the first assembly surface 105 and the vertical direction ranges from 10° to 40°, with a more preferred angle of 25°. The angle between the first engagement surface 106 and the vertical direction ranges from 20° to 50°, with a more preferred angle of 36°.

[0020] Furthermore, the second annular hook 109 on the top outer wall of the cover 100 includes a first vertical surface 110, a second engaging surface 111, and a second vertical surface 112. The angle between the first vertical surface 110 and the vertical direction ranges from -20° to 20°. In the free state, the gap between the cover 100 and the top cover 300 near the first vertical surface 110 is -0.6-0.6 mm, preferably -0.1 mm. The cover 100 and the top cover 300 near the first vertical surface 110 have a transition fit. The angle between the second engaging surface 111 and the horizontal direction ranges from 0° to 40°, preferably 15°. In the free state, the gap between the cover 100 and the top cover 300 near the second engaging surface 111 is -0.6-0.6 mm, preferably -0.1 mm. The cover 100 and the top cover 300 near the second engaging surface 111 have a transition fit. When the top cover 300 is installed, the top cover 300... The top cover 300 and the cover body 100 can be locked together without any wobbling. The angle between the second vertical surface 112 and the vertical direction ranges from 0 to 40°. The second vertical surface 112 serves as a guide to facilitate guidance during the assembly of the top cover 300. The horizontal distance between the first vertical surface 110 and the second vertical surface 112 forms the engagement amount between the top cover 300 and the cover body 100, which is 0.1-2 mm, preferably 0.3 mm. The clamping force is large enough to clamp the top cover 300 to the cover body 100 tightly enough to fix the top cover 300 to the cover body 100. This clamping force is much greater than the force required to tear the rib 308. The clamping force is 2 to 20 times the force required to tear the rib. When the top cover 300 is torn by hand, the rib 308 breaks, the inner ring 301 of the easy-tear structure layer of the top cover 300 separates from the cover body 100, and the outer ring 302 remains on the main body of the cover body 100.

[0021] Furthermore, the gap between the top cover 300 and the cover body 100 near the first vertical surface 110, and the gap between the top cover 300 and the cover body 100 near the second engaging surface 111, in the free state, at least one surface of the top cover 300 and the cover body 100 at the first vertical surface 110 and the second engaging surface 111 is an interference fit. This relationship ensures that when the top cover 300 is installed, at least one surface of the top cover 300 and the cover body 100 at the first vertical surface 110 and the second engaging surface 111 can just secure the top cover to the cover body 100 without any shaking.

[0022] Furthermore, both the cover 100 and the top cover 300 are annular or barrel-shaped structures, which can be applied to all containers 400 with a lip-shaped outer neck. This type of container 400 is also commonly used. The circular structure also means that no angle positioning is required when assembling this device. No angle positioning is required when assembling the cover 100 with the rubber stopper 200, the cover 100 with the container 400, or the top cover 300 with the cover 100.

[0023] Because the locking structure between the top cover 300 and the body 100 is simple, there is no need to specify the assembly order. The body 100 can be locked with the rubber stopper 200 first, and then the top cover 300 can be locked into the body 100; or the conventional method of assembling the top cover 300 and the body 100 first and then locking the rubber stopper 200 will not cause any problems. This can avoid the scrapping of parts due to the operator's unfamiliarity with the assembly order. At the same time, the freedom of assembly order also facilitates the storage of pre-assembled parts. The body 100 and the top cover 300 can be pre-assembled into a pre-assembled part, or the rubber stopper 200 can be installed into the body 100 first to form a pre-assembled part, and the top cover 300 can be locked and assembled after the container 400 is filled.

[0024] The beneficial effects of the present invention are as follows: The top cover 300 consists of two layers, an outer ring 302 and an inner ring 301, which are integrally formed. The connection is made of several ribs 308 with a small cross-sectional area, which can be easily torn apart. The break after tearing is controllable and no foreign objects will appear. The assembly sequence is free. The top cover 300 is easy to assemble. The breakage part of the tearing structure 307 is controllable and more reliable. The cover body 100 and the top cover 300 are tightly connected, and the dustproof effect is better. At the same time, the outer ring 302 and the cover body 100 are fastened with an annular elastic wall, and the locking cover assembly is simple and has high stability. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall appearance of the convenient locking cap for a container with an annular neck opening according to the present invention.

[0026] Figure 2 This is a schematic diagram of the overall appearance of the convenient locking cap for a container with an annular neck opening according to the present invention.

[0027] Figure 3 This is a side view of the convenient locking cap for a container with an annular neck opening according to the present invention.

[0028] Figure 4 This is a side view of the cover of the convenient locking lid of the present invention for a container with an annular neck opening.

[0029] Figure 5 This is a top view of the cover of the convenient locking lid of the present invention for a container with an annular neck opening.

[0030] Figure 6 This is a cross-sectional view of the cover of the convenient locking lid of the present invention for a container with an annular neck opening.

[0031] Figure 7 This is a schematic diagram of the locking structure of the cover body and the rubber stopper 200 of the convenient locking cap for a container with an annular neck opening according to the present invention.

[0032] Figure 8This is a schematic diagram of the locking structure between the cover body and the neck of the container 400 of the convenient locking cap applicable to the annular neck opening container of the present invention.

[0033] Figure 9 This is a schematic diagram of the locking structure between the top cover and the cover body 100 of the convenient locking cap for a container with an annular neck opening according to the present invention.

[0034] Figure 10 Top view of the snap-fit ​​of the top cover and the cover body 100 of the convenient locking cap for a container with an annular neck opening according to the present invention.

[0035] Figure 11 This is a schematic diagram of the inner ring structure of the tear-off top cover of the convenient locking cap for annular neck opening containers according to the present invention.

[0036] Figure 12 This is a top view of the convenient locking cap for a container with an annular neck opening, after the inner ring of the top cap has been torn open.

[0037] Figure 13 This is a top view of the cover of the convenient locking lid of the present invention for a container with an annular neck opening.

[0038] Figure 14 This is a partial structural diagram of the locking mechanism between the top cover and the body of the convenient locking cap for a container with an annular neck opening, as described in this invention.

[0039] Explanation of main component symbols The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation Detailed Implementation Method 1 like Figure 1 The diagram shown is an overall appearance schematic of the convenient locking cap for a container with an annular neck opening according to the present invention; as shown... Figure 2 The diagram shown is an overall appearance schematic of the convenient locking cap for a container with an annular neck opening according to the present invention; as shown... Figure 3 The image shown is a side view of the convenient locking cap for a container with an annular neck opening according to the present invention; as shown... Figure 4 The image shown is a side view of the cover of the convenient locking cap for a container with an annular neck opening according to the present invention; as shown... Figure 5 The image shown is a top view of the cover of the convenient locking cap for a container with an annular neck opening according to the present invention; as shown... Figure 6 The image shown is a cross-sectional view of the cover of the convenient locking cap for a container with an annular neck opening according to the present invention; as shown... Figure 7 The diagram shows the locking structure of the cover body and the rubber stopper of the convenient locking cap for a container with an annular neck opening according to the present invention; as shown... Figure 8The diagram shows the locking structure between the cover body and the container neck of the convenient locking cap for a container with an annular neck opening, as per the present invention; Figure 9 The diagram shows the locking structure between the top cover and the body of the convenient locking cap for a container with an annular neck opening, as shown in the present invention. Figure 10 The image shows a top view of the locking mechanism of the convenient locking cap for a container with an annular neck opening, according to the present invention, where the top cover and the cover body are engaged. Figure 11 The diagram shown is a schematic representation of the inner ring structure of the tear-off top cover of the convenient locking cap for annular neck-opening containers according to the present invention; as shown... Figure 12 The image shown is a top view of the convenient locking cap for a container with an annular neck opening, after the inner ring of the top cap has been torn open; as shown... Figure 13 The image shown is a top view of the cover of the convenient locking cap for a container with an annular neck opening according to the present invention; as shown... Figure 14 The diagram shown is a partial structural diagram of the locking mechanism of the top cover and the body of the convenient locking cap for a container with an annular neck opening, according to the present invention.

[0041] A convenient locking cap for a container with an annular neck opening is provided. The locking cap consists of a cover body 100, a rubber stopper 200, a container 400, and a top cover 300. The rubber stopper 200 is placed inside the cover body 100, and the top cover 300 is located on top of the cover body 100. The cover body 100 is sleeved with the neck of the container 400. The cover body 100 is a hollow structure with a central hole 101 at the top center for providing a channel for a syringe needle. The bottom has an open opening 108 for receiving the container 400. Two sets of elastic arms 102 are provided on the inner wall of the cover body 100 to completely fix the rubber stopper 200 between the container 400 and the cover body 100. The two sets of elastic arms 102 are inverted structures. The two sets of elastic arms 102 include an upper elastic arm 103 and a lower elastic arm 104. The upper elastic arm 103 engages with the rubber stopper 200, and the lower elastic arm 104 engages with the neck of the container 400. The top of the cover 100 is provided with a clearance hole 107 corresponding to the position of the elastic arm 102. The top cover 300 is divided into two layers: an inner ring 301 and an outer ring 302. The inner ring 301 is an easy-tear structure layer. The outer ring 302 has a first annular hook 303 extending vertically downward on the outer side. The top outer side of the cover 100 is provided with a second annular hook 109. The first annular hook 303 engages with the second annular hook 109. After the outer ring 302 engages with the cover 100, it forms a sealed whole, achieving the function of side dust prevention and isolation from the outside.

[0042] The inner ring 301 of the top cover has a circular structure at its center, and the diameter of the circular structure is larger than the diameter of the central hole 101, so that the inner ring 301 of the top cover can cover the central hole 101 set at the top of the cover body 100, thereby achieving the function of dust prevention and isolation from the outside.

[0043] The inner ring 301 of the top cover, the easy-tear structure of the inner ring 301 of the top cover, and the outer ring 302 of the top cover are all on the same plane.

[0044] The cover body 100 has a plurality of clearance holes 107 arranged in a ring around the center hole 101. The inner diameter of the outer ring 302 of the top cover is smaller than the circumference diameter formed by the clearance holes 107 at the top, so that the outer ring 302 of the top cover can cover all the clearance holes 107 at the top of the cover body 100, thus playing the role of dust prevention and isolation from the outside at the top.

[0045] The annular structure at the center of the inner ring of the top cover shields the central hole 101 at the top of the cover body 100, and the outer ring 302 of the top cover shields all the clearance holes at the top of the cover body 100. At this time, the locking cover completes the shielding of the sides and the top, forming a complete isolation from the outside world.

[0046] The upper elastic arm 103 and the lower elastic arm 104 are arranged in a ring, with a quantity of 3-8, preferably 3. The wall thickness of the elastic arm 102 connected to the cover body 100 is greater than the wall thickness of the elastic arm 102 away from the cover body 100. The elastic arm 102 away from the cover body 100 has better elasticity. The dimension of the elastic arm 102 in the width direction is 3-20 times that in the thickness direction, preferably 10 times. The width of the clearance hole 107 is greater than the width of the elastic arm 102 to facilitate mold forming.

[0047] The top cover 300 is made of a plastic material with a certain degree of elasticity. This choice of elastic material allows the outer ring 302 of the top cover to have a certain degree of elasticity. In the free state, the inner diameter of the first annular hook 303 is slightly smaller than the outer diameter of the second annular hook 109. The connection between the first annular hook 303 and the second annular hook 109 is an interference fit. The interference fit is used to eliminate the gap caused by assembly tolerance. Generally speaking, in the free state, the gap between the inner diameter of the first annular hook 303 and the outer diameter of the second annular hook 109 is -0.6-0.6mm. When the gap between the outer diameters of the first annular hook 303 and the second annular hook 109 is -0.1mm, the outer diameters of the annular hook 303 of the top cover outer ring 302 and the corresponding outer diameters of the cover body 100 are an interference fit. When the two are assembled together, they can be locked together.

[0048] The locking cover is a locking cover that can be opened with one hand.

[0049] The outer ring 302 and inner ring 301 of the top cover 300 are connected by a group of ribs 308. The group of ribs 308 consists of several ribs with small cross-sectional areas. The strength of the group of ribs 308 is much less than that of the Easyla structural layer 301 and the top cover body layer 302, so that the fracture position is stable and controllable and no fragmentation or foreign matter will occur. After separation, it breaks into two parts, inner and outer, which cannot be restored. This ensures that the device is for single use. The number of ribs 308 is 4-10, preferably 4. The fracture surface of the ribs 308 is one of rectangle, circle and ellipse, with rectangle being more preferred. The structure is simple and easy to produce. The cross-sectional area of ​​the ribs 308 is 0.02-0.8mm².

[0050] Rib 308 is located on the side of the inner and outer rings of the top cover. When the top cover 300 is engaged with the cover body 100, the downward pressing force will not be transmitted to the rib 308, thus avoiding the risk of the rib 308 being broken prematurely.

[0051] The inner ring 301 of the top cover is provided with a handle 309, which is 1-5mm wide, so that users can easily grasp the inner ring 301 and perform tearing actions. The outer ring 302 of the top cover is provided with an opening 310, and the handle 309 extends to the opening 310. The end of the handle 309 extends vertically downward and is provided with a third hook 305, which engages with the second annular hook 109. The width of the handle 309 is slightly smaller than the width of the opening 310.

[0052] After the inner and outer rings of the top cover 300 break, the top opening of the cover body 100 is removed. At this time, an instrument such as a syringe can be used to pierce the rubber stopper 200 and take out the medicine in the container 400.

[0053] The rubber stopper 200 consists of a stopper head 201 and a stopper body 202. The stopper 200 has a ring structure. The top end of the upper elastic arm 103 engages with the bottom surface of the stopper head 201. The outer diameter a of the stopper head 201 is larger than the diameter b of the circle formed by the top ends of the upper elastic arms 103. The diameter b of the circle formed by the top ends of the upper elastic arms 103 is larger than the outer diameter c of the lip of the container 400. The outer diameter c of the lip of the container 400 is larger than the diameter d of the circle formed by the top ends of the lower elastic arms 104. The outer diameter a of the stopper head 201 is larger than the outer diameter d of the upper elastic arm 104. The diameter b of the circle formed by the top ends of the upper elastic arm 103 ensures that the rubber stopper 400 can be fixed inside the cover body 100 by the upper elastic arm 103. The diameter b of the circle formed by the top ends of the upper elastic arm 103 is larger than the outer diameter c of the lip of the container 400, which can prevent the outer edge of the lip of the container 400 from squeezing the upper elastic arm 103 and causing the rubber stopper 200 to fall off. The outer diameter c of the lip of the container 400 is larger than the diameter d of the circle formed by the top ends of the lower elastic arm 104, which can ensure that the lower elastic arm 104 can hold the outer edge of the lip of the container 400.

[0054] A connecting surface 306 is provided at the junction of the neck and the body of the container 400, and the top of the lower elastic arm 104 engages with the connecting surface 306.

[0055] The elastic arm 102 includes a first assembly surface 105 and a first engagement surface 106. The angle between the first assembly surface 105 and the vertical direction ranges from 10° to 40°, and the angle between the first engagement surface 106 and the vertical direction ranges from 20° to 50°.

[0056] The second annular hook 109 on the top outer wall of the cover 100 includes a first vertical surface 110, a second engaging surface 111, and a second vertical surface 112. The angle between the first vertical surface 110 and the vertical direction ranges from -20° to 20°. In the free state, the gap between the cover 100 and the top cover 300 near the first vertical surface 110 is -0.6-0.6mm, and the cover 100 and the top cover 300 have a transition fit near the first vertical surface 110. The angle between the second engaging surface 111 and the horizontal direction ranges from 0° to 40°. In the free state, the gap between the cover 100 and the top cover 300 near the second engaging surface 111 is -0.6-0.6mm, and the cover 100 and the top cover 300 have a transition fit near the second engaging surface 111. When the top cover 300 is installed, the top cover 300 and the cover 100 can just fit together. The cover is locked in place without any wobbling. The angle between the second vertical surface 112 and the vertical direction ranges from 0 to 40°. The second vertical surface 112 serves as a guide to facilitate guidance during the assembly of the top cover 300. The horizontal distance between the first vertical surface 110 and the second vertical surface 112 forms the engagement amount between the top cover 300 and the cover body 100. This engagement amount is 0.1-2mm. The engagement amount between the top cover 300 and the cover body 100 is large enough to lock the top cover 300 and the cover body 100 tightly enough to fix the top cover 300 onto the cover body 100. This locking force is much greater than the force required to tear the rib 308. The locking force is 2-20 times the force required to tear the rib. When the top cover 300 is torn by hand, the rib 308 breaks, the inner ring 301 of the easy-tear structure layer of the top cover 300 separates from the cover body 100, and the outer ring 302 remains on the main body of the cover body 100.

[0057] The gap between the top cover 300 and the cover body 100 near the first vertical surface 110 and the gap between the top cover 300 and the cover body 100 near the second engaging surface 111, in the free state, at least one surface of the top cover 300 and the cover body 100 at the first vertical surface 110 and the second engaging surface 111 is an interference fit. This relationship ensures that when the top cover 300 is installed, at least one surface of the top cover 300 and the cover body 100 at the first vertical surface 110 and the second engaging surface 111 can just secure the top cover to the cover body 100 without any shaking.

[0058] Both the cover 100 and the top cover 300 are annular or barrel-shaped structures, which can be applied to all containers 400 with a lip-shaped outer neck. This type of container 400 is also commonly used. The circular structure also means that no angle positioning is required when assembling this device. No angle positioning is required when assembling the cover 100 with the rubber stopper 200, the cover 100 with the container 400, or the top cover 300 with the cover 100.

[0059] Because the locking structure between the top cover 300 and the body 100 is simple, there is no need to specify the assembly order. The body 100 can be locked with the rubber stopper 200 first, and then the top cover 300 can be locked into the body 100; or the conventional method of assembling the top cover 300 and the body 100 first and then locking the rubber stopper 200 will not cause any problems. This can avoid the scrapping of parts due to the operator's unfamiliarity with the assembly order. At the same time, the freedom of assembly order also facilitates the storage of pre-assembled parts. The body 100 and the top cover 300 can be pre-assembled into a pre-assembled part, or the rubber stopper 200 can be installed into the body 100 first to form a pre-assembled part, and the top cover 300 can be locked and assembled after the container 400 is filled.

[0060] The assembly steps for a convenient locking cap suitable for a container with an annular neck opening are as follows: Step 1: Attach the first annular hook 109 of the outer ring 302 of the top cover 300 to the skirt edge of the second annular hook 303 on the outer top side of the cover body 100. The hook of the top cover 300 is a full-circumference annular hook, requiring no angle positioning.

[0061] Step 2: Insert the rubber plug 200 from the bottom of the cover body 100, with the flat bottom side of the rubber plug 200 facing the cover body 100. Pass it over the two sets of elastic arms 102 inside the cover body 100 and reach the predetermined engagement position. The upper elastic arm 103 then resets, completing the engagement. The rubber plug 200 has a ring structure and does not require angle positioning.

[0062] Step 3: Attach the assembled component to the neck of container 400. The outer lip edge of the neck of container 400 extends past the lower elastic arm 104 inside the cover 100, reaching the predetermined engagement position. The lower elastic arm 104 then resets, completing the engagement. The neck of container 400 has a ring structure and does not require angular positioning.

[0063] Step 4: Assembly complete. The top cover 300 can be installed at any time, and the installation order can be adjusted as needed.

[0064] The steps for using a convenient locking cap suitable for containers with ring-shaped neck openings are as follows: Step 1: Grasp the handle 309 of the inner ring 301 of the top cover, tear open the inner ring 301 of the top cover 300, and remove the cover of the rubber stopper 200. At this time, you can use a device such as a syringe to insert into the rubber stopper 200 and take out the medicine in the container 400.

[0065] Step 2: After use, the inner ring 301 of the top cover 300 has fallen off and cannot be restored, ensuring that the device is for single use only. Detailed Implementation Method 2 like Figure 1 The diagram shown is an overall appearance schematic of the convenient locking cap for a container with an annular neck opening according to the present invention; as shown... Figure 2 The diagram shown is an overall appearance schematic of the convenient locking cap for a container with an annular neck opening according to the present invention; as shown... Figure 3 The image shown is a side view of the convenient locking cap for a container with an annular neck opening according to the present invention; as shown... Figure 4 The image shown is a side view of the cover of the convenient locking cap for a container with an annular neck opening according to the present invention; as shown... Figure 5 The image shown is a top view of the cover of the convenient locking cap for a container with an annular neck opening according to the present invention; as shown... Figure 6 The image shown is a cross-sectional view of the cover of the convenient locking cap for a container with an annular neck opening according to the present invention; as shown... Figure 7 The diagram shows the locking structure of the cover body and the rubber stopper of the convenient locking cap for a container with an annular neck opening according to the present invention; as shown... Figure 8 The diagram shows the locking structure between the cover body and the container neck of the convenient locking cap for a container with an annular neck opening, as per the present invention; Figure 9 The diagram shows the locking structure between the top cover and the body of the convenient locking cap for a container with an annular neck opening, as shown in the present invention. Figure 10 The image shows a top view of the locking mechanism of the convenient locking cap for a container with an annular neck opening, according to the present invention, where the top cover and the cover body are engaged. Figure 11 The diagram shown is a schematic representation of the inner ring structure of the tear-off top cover of the convenient locking cap for annular neck-opening containers according to the present invention; as shown... Figure 12 The image shown is a top view of the convenient locking cap for a container with an annular neck opening, after the inner ring of the top cap has been torn open; as shown... Figure 13 The image shown is a top view of the cover of the convenient locking cap for a container with an annular neck opening according to the present invention; as shown... Figure 14 The diagram shown is a partial structural diagram of the locking mechanism of the top cover and the body of the convenient locking cap for a container with an annular neck opening, according to the present invention.

[0067] A convenient locking cap for a container with an annular neck opening is provided. The locking cap consists of a cover body 100, a rubber stopper 200, a container 400, and a top cover 300. The rubber stopper 200 is placed inside the cover body 100, and the top cover 300 is located on top of the cover body 100. The cover body 100 is sleeved with the neck of the container 400. The cover body 100 is a hollow structure with a central hole 101 at the top center for providing a channel for a syringe needle. The bottom has an open opening 108 for receiving the container 400. Two sets of elastic arms 102 are provided on the inner wall of the cover body 100 to completely fix the rubber stopper 200 between the container 400 and the cover body 100. The two sets of elastic arms 102 are inverted structures. The two sets of elastic arms 102 include an upper elastic arm 103 and a lower elastic arm 104. The upper elastic arm 103 engages with the rubber stopper 200, and the lower elastic arm 104 engages with the neck of the container 400. The top of the cover 100 is provided with a clearance hole 107 corresponding to the position of the elastic arm 102. The top cover 300 is divided into two layers: an inner ring 301 and an outer ring 302. The inner ring 301 is an easy-tear structure layer. The outer ring 302 has a first annular hook 303 extending vertically downward on the outer side. The top outer side of the cover 100 is provided with a second annular hook 109. The first annular hook 303 engages with the second annular hook 109. After the outer ring 302 engages with the cover 100, it forms a sealed whole, achieving the function of side dust prevention and isolation from the outside.

[0068] The inner ring 301 of the top cover has a circular structure at its center, and the diameter of the circular structure is larger than the diameter of the central hole 101, so that the inner ring 301 of the top cover can cover the central hole 101 set at the top of the cover body 100, thereby achieving the function of dust prevention and isolation from the outside.

[0069] The inner ring 301 of the top cover, the easy-tear structure of the inner ring 301 of the top cover, and the outer ring 302 of the top cover are all on the same plane.

[0070] The cover body 100 has a plurality of clearance holes 107 arranged in a ring around the center hole 101. The inner diameter of the outer ring 302 of the top cover is smaller than the circumference diameter formed by the clearance holes 107 at the top, so that the outer ring 302 of the top cover can cover all the clearance holes 107 at the top of the cover body 100, thus playing the role of dust prevention and isolation from the outside at the top.

[0071] The annular structure at the center of the inner ring of the top cover shields the central hole 101 at the top of the cover body 100, and the outer ring 302 of the top cover shields all the clearance holes at the top of the cover body 100. At this time, the locking cover completes the shielding of the sides and the top, forming a complete isolation from the outside world.

[0072] The upper elastic arm 103 and the lower elastic arm 104 are arranged in a ring, with a quantity of 3-8, preferably 3. The wall thickness of the elastic arm 102 connected to the cover body 100 is greater than the wall thickness of the elastic arm 102 away from the cover body 100. The elastic arm 102 away from the cover body 100 has better elasticity. The dimension of the elastic arm 102 in the width direction is 10 times. The width of the clearance hole 107 is greater than the width of the elastic arm 102 to facilitate mold forming.

[0073] The top cover 300 is made of a plastic material with a certain degree of elasticity. This choice of elastic material allows the outer ring 302 of the top cover to have a certain degree of elasticity. In the free state, the inner diameter of the first annular hook 303 is slightly smaller than the outer diameter of the second annular hook 109. The connection between the first annular hook 303 and the second annular hook 109 is a transition fit. The transition fit is used to eliminate the gap caused by assembly tolerance. Generally speaking, in the free state, the gap between the inner diameter of the first annular hook 303 and the outer diameter of the second annular hook 109 is -0.1mm. When the gap between the outer diameters of the first annular hook 303 and the second annular hook 109 is -0.1mm, the outer diameter of the annular hook 303 of the top cover outer ring 302 and the corresponding outer diameter of the cover body 100 are in a transition fit. When the two are assembled together, they can be locked together.

[0074] The locking cover is a locking cover that can be opened with one hand.

[0075] The outer ring 302 and inner ring 301 of the top cover 300 are connected by a group of ribs 308. The group of ribs 308 consists of several ribs with small cross-sectional areas. The strength of the group of ribs 308 is much less than that of the Easyla structural layer 301 and the top cover body layer 302, so that the fracture position is stable and controllable and no fragmentation or foreign matter will occur. After separation, it breaks into two parts, inner and outer, which cannot be restored. This ensures that the device is for single use. There are 4 ribs 308. The fracture surface of the rib 308 is one of rectangular, circular and elliptical, with rectangular being the preferred shape. The structure is simple and easy to produce. The cross-sectional area of ​​the rib 308 is 0.56 mm².

[0076] Rib 308 is located on the side of the inner and outer rings of the top cover. When the top cover 300 is engaged with the cover body 100, the downward pressing force will not be transmitted to the rib 308, thus avoiding the risk of the rib 308 being broken prematurely.

[0077] The inner ring 301 of the top cover is provided with a handle 309, which is 3mm wide, so that the user can easily grasp the inner ring 301 and perform a tearing action. The outer ring 302 of the top cover is provided with an opening 310, and the handle 309 extends to the opening 310. The end of the handle 309 extends vertically downward and is provided with a third hook 305, which engages with the second annular hook 109. The width of the handle 309 is slightly smaller than the width of the opening 310.

[0078] After the inner and outer rings of the top cover 300 break, the top opening of the cover body 100 is removed. At this time, an instrument such as a syringe can be used to pierce the rubber stopper 200 and take out the medicine in the container 400.

[0079] The rubber stopper 200 consists of a stopper head 201 and a stopper body 202. The stopper 200 has a ring structure. The top end of the upper elastic arm 103 engages with the bottom surface of the stopper head 201. The outer diameter a of the stopper head 201 is larger than the diameter b of the circle formed by the top ends of the upper elastic arms 103. The diameter b of the circle formed by the top ends of the upper elastic arms 103 is larger than the outer diameter c of the lip of the container 400. The outer diameter c of the lip of the container 400 is larger than the diameter d of the circle formed by the top ends of the lower elastic arms 104. The outer diameter a of the stopper head 201 is larger than the outer diameter d of the upper elastic arm 104. The diameter b of the circle formed by the top ends of the upper elastic arm 103 ensures that the rubber stopper 400 can be fixed inside the cover body 100 by the upper elastic arm 103. The diameter b of the circle formed by the top ends of the upper elastic arm 103 is larger than the outer diameter c of the lip of the container 400, which can prevent the outer edge of the lip of the container 400 from squeezing the upper elastic arm 103 and causing the rubber stopper 200 to fall off. The outer diameter c of the lip of the container 400 is larger than the diameter d of the circle formed by the top ends of the lower elastic arm 104, which can ensure that the lower elastic arm 104 can hold the outer edge of the lip of the container 400.

[0080] A connecting surface 306 is provided at the junction of the neck and the body of the container 400, and the top of the lower elastic arm 104 engages with the connecting surface 306.

[0081] The elastic arm 102 includes a first assembly surface 105 and a first engagement surface 106. The angle between the first assembly surface 105 and the vertical direction is in the range of 25°, and the angle between the first engagement surface 106 and the vertical direction is in the range of 36°.

[0082] The second annular hook 109 on the top outer wall of the cover 100 includes a first vertical surface 110, a second engaging surface 111, and a second vertical surface 112. The angle between the first vertical surface 110 and the vertical direction ranges from -20° to 20°. In the free state, the gap between the cover 100 and the top cover 300 near the first vertical surface 110 is -0.1mm, and the cover 100 and the top cover 300 have a transition fit near the first vertical surface 110. The angle between the second engaging surface 111 and the horizontal direction ranges from 15°. In the free state, the gap between the cover 100 and the top cover 300 near the second engaging surface 111 is -0.1mm, and the cover 100 and the top cover 300 have a transition fit near the second engaging surface 111. When the top cover 300 is installed, the top cover 300 and the cover 100 can be locked together without any shaking. The angle between the second vertical plane 112 and the vertical direction ranges from 0 to 40°. The second vertical plane 112 serves as a guide to facilitate guidance during the assembly of the top cover 300. The horizontal distance between the first vertical plane 110 and the second vertical plane 112 forms the engagement amount between the top cover 300 and the cover body 100. This engagement amount is 0.1-2 mm, preferably 0.3 mm. The engagement amount between the top cover 300 and the cover body 100 is large enough to secure the top cover 300 to the cover body 100 tightly. This clamping force is much greater than the force required to tear the rib 308. The clamping force is 2-20 times the force required to tear the rib. When the top cover 300 is torn by hand, the rib 308 breaks, the inner ring 301 of the easy-tear structure layer of the top cover 300 separates from the cover body 100, and the outer ring 302 remains on the main body of the cover body 100.

[0083] The gap between the top cover 300 and the cover body 100 near the first vertical surface 110 and the gap between the top cover 300 and the cover body 100 near the second engaging surface 111, in the free state, at least one surface of the top cover 300 and the cover body 100 at the first vertical surface 110 and the second engaging surface 111 is an interference fit. This relationship ensures that when the top cover 300 is installed, at least one surface of the top cover 300 and the cover body 100 at the first vertical surface 110 and the second engaging surface 111 can just secure the top cover to the cover body 100 without any shaking.

[0084] Both the cover 100 and the top cover 300 are annular or barrel-shaped structures, which can be applied to all containers 400 with a lip-shaped outer neck. This type of container 400 is also commonly used. The circular structure also means that no angle positioning is required when assembling this device. No angle positioning is required when assembling the cover 100 with the rubber stopper 200, the cover 100 with the container 400, or the top cover 300 with the cover 100.

[0085] Because the locking structure between the top cover 300 and the body 100 is simple, there is no need to specify the assembly order. The body 100 can be locked with the rubber stopper 200 first, and then the top cover 300 can be locked into the body 100; or the conventional method of assembling the top cover 300 and the body 100 first and then locking the rubber stopper 200 will not cause any problems. This can avoid the scrapping of parts due to the operator's unfamiliarity with the assembly order. At the same time, the freedom of assembly order also facilitates the storage of pre-assembled parts. The body 100 and the top cover 300 can be pre-assembled into a pre-assembled part, or the rubber stopper 200 can be installed into the body 100 first to form a pre-assembled part, and the top cover 300 can be locked and assembled after the container 400 is filled.

[0086] The assembly steps for a convenient locking cap suitable for a container with an annular neck opening are as follows: Step 1: Attach the first annular hook 109 of the outer ring 302 of the top cover 300 to the skirt edge of the second annular hook 303 on the outer top side of the cover body 100. The hook of the top cover 300 is a full-circumference annular hook, requiring no angle positioning.

[0087] Step 2: Insert the rubber plug 200 from the bottom of the cover body 100, with the flat bottom side of the rubber plug 200 facing the cover body 100. Pass it over the two sets of elastic arms 102 inside the cover body 100 and reach the predetermined engagement position. The upper elastic arm 103 then resets, completing the engagement. The rubber plug 200 has a ring structure and does not require angle positioning.

[0088] Step 3: Attach the assembled component to the neck of container 400. The outer lip edge of the neck of container 400 extends past the lower elastic arm 104 inside the cover 100, reaching the predetermined engagement position. The lower elastic arm 104 then resets, completing the engagement. The neck of container 400 has a ring structure and does not require angular positioning.

[0089] Step 4: Assembly complete. The top cover 300 can be installed at any time, and the installation order can be adjusted as needed.

[0090] The steps for using a convenient locking cap suitable for containers with ring-shaped neck openings are as follows: Step 1: Grasp the handle 309 of the inner ring 301 of the top cover, tear open the inner ring 301 of the top cover 300, and remove the cover of the rubber stopper 200. At this time, you can use a device such as a syringe to insert into the rubber stopper 200 and take out the medicine in the container 400.

[0091] Step 2: After use, the inner ring 301 of the top cover 300 has fallen off and cannot be restored, ensuring that the device is for single use only.

[0092] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A convenient locking cap for a container with an annular neck opening, comprising a cover body, a rubber stopper disposed inside the cover body, and a top cap disposed on the top of the cover body, characterized in that: The top of the cover has a central hole, the bottom is used to receive the container, and the inner wall of the cover has two sets of elastic arms to fix the rubber stopper between the container and the cover. The top cover consists of two layers: an inner ring and an outer ring. The inner ring is an easy-tear structure layer, and the outer ring extends vertically downwards and engages with the top outer side of the cover body to form a sealed whole.

2. The convenient locking cap for a container with an annular neck opening according to claim 1, characterized in that, The two sets of elastic arms include an upper elastic arm and a lower elastic arm, wherein the upper elastic arm engages with the rubber stopper and the lower elastic arm engages with the neck of the container.

3. The convenient locking cap for a container with an annular neck opening according to claim 2, characterized in that, The stopper includes a stopper head and a stopper body. The outer diameter of the stopper head is a, the diameter of the circle formed by the top ends of the upper elastic arms is b, the outer diameter of the lip of the container is c, and the diameter of the circle formed by the top ends of the lower elastic arms is d, where a > b > c > d.

4. The convenient locking cap for a container with an annular neck opening according to claim 2, characterized in that, The wall thickness of the elastic arm connected to the cover body is greater than the wall thickness of the portion away from the cover body, and the dimension of the elastic arm in the width direction is 3-20 times that in the thickness direction.

5. The convenient locking cap for annular neck opening containers according to claim 1, characterized in that, The elastic arm includes a first assembly surface and a first engagement surface. The angle between the first assembly surface and the vertical direction ranges from 10° to 40°, and the angle between the first engagement surface and the vertical direction ranges from 20° to 50°.

6. The convenient locking cap for annular neck opening containers according to claim 1, characterized in that, The top of the cover body is provided with a clearance hole corresponding to the position of the elastic arm, and the clearance holes are arranged in a ring around the hollow hole; The inner ring of the top cover covers the central hole, and the outer ring of the top cover covers all the clearance holes. Both the inner and outer rings of the top cover are on the same plane.

7. The convenient locking cap for a container with an annular neck opening according to claim 1, characterized in that, The outer side of the top cover outer ring is provided with a first annular hook, and the outer side of the top of the cover body is provided with a second annular hook; In its free state, the inner diameter of the first annular hook is smaller than the outer diameter of the second annular hook. During assembly, the first annular hook and the second annular hook are interference-fitted, causing the top cover to be just locked to the cover body.

8. The convenient locking cap for a container with an annular neck opening according to claim 7, characterized in that, The second annular hook includes a first vertical surface, a second engaging surface, and a second vertical surface; The angle between the first vertical plane and the vertical direction is in the range of -20° to 20°. In the free state, the gap between the cover and the top cover near the first vertical plane is -0.6 mm to 0.6 mm. The angle between the second engaging surface and the horizontal direction ranges from 0° to 40°. In the free state, the gap between the cover and the top cover near the second engaging surface is -0.6 mm to -0.6 mm. The angle between the second vertical plane and the vertical direction ranges from -0° to 40°. In the free state, at least one of the top cover and the cover body is interference-fitted at the first vertical surface and the second engagement surface. The horizontal distance between the first vertical surface and the second vertical surface forms the fastening engagement of the top cover and the cover body, and the force of this fastening engagement is greater than the force required to tear open the inner ring of the top cover.

9. The convenient locking cap for a container with an annular neck opening according to claim 7, characterized in that, The inner ring of the top cover is provided with a handle, and the outer ring of the top cover is provided with an opening. The handle extends to the opening and its end extends vertically downward to provide a third hook, which engages with the second annular hook.

10. The convenient locking cap for annular neck opening containers according to claim 1, characterized in that, Both the cover and the top cover are annular or barrel-shaped structures. When assembling the cover with the rubber stopper, the container and the top cover, no angle positioning is required.

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