Opening device for packaging piece and packaging piece

Abstract

The present disclosure provides an opening device for a package comprising a base, a cap, a cutter, a drive connection device and a guide device. The cutter is at least partially disposed in the opening of the base. A drive connection device couples the cutter with the cap, causing the cap to drive the cutter to move to cut the sealing layer of the package when the cap is initially unscrewed to open the opening. The guiding device guides the cutter to move along a predetermined path under the driving of the cap. The predetermined path includes a first starting spiral section and a second subsequent spiral section, and when moving along the two sections, the cutter rotates around the axis while moving along the axis. In response to the cap rotating by a specific angle, the cutter moves in the axial direction by a distance greater than the distance in the axial direction when moving along the first starting helical segment, however, the cutter rotates about the axis at an angle smaller than the angle about the axis when moving along the second subsequent helical segment.

Description

Technical Field

[0001] Embodiments of the present disclosure generally relate to an opening device for a package, and more particularly to a reclosable opening device. Background Art

[0002] The outlet of some packages (e.g. beverage packaging boxes) is sealed with a sealing layer, such as a pierceable film. An existing opening device for such packages includes a cutter capable of cutting the sealing layer, which can be moved toward the sealing layer under the action of a twistable cap to cut the sealing layer so that the contents of the package can be poured out from the opening. Summary of the invention

[0003] According to a first aspect of the present disclosure, the present disclosure provides an opening device for a package, comprising a base, a cap, a cutter, a drive connection device and a guide device. The base defines an opening having an axis. The cap is threadedly connected to the base to close and open the opening. The cutter is cylindrical and has a cutting portion arranged at its distal end. The cutter is at least partially arranged in the opening of the base. The drive connection device couples the cutter to the cap and is configured to cause the rotation of the cap to drive the cutter to move when the cap is initially loosened to open the opening to cut the sealing layer of the package. The guide device couples the cutter to the base and is configured to guide the cutter to move along a predetermined path under the drive of the cap. The predetermined path comprises a first starting spiral segment and a second subsequent spiral segment, and when moving along the first starting spiral segment and the second subsequent spiral segment, the cutter rotates around the axis while moving along the axis. In response to the cap rotating a specific angle, the distance the cutter moves in the axial direction when moving along the first starting spiral segment is greater than the distance the cutter moves in the axial direction when moving along the second subsequent spiral segment, but the angle of rotation of the cutter around the axis when moving along the first starting spiral segment is less than the angle of rotation around the axis when moving along the second subsequent spiral segment.

[0004] According to the opening device of the first aspect mentioned above, the guiding device includes at least one guiding groove and at least one guiding slide accommodated in at least one guiding groove, at least one guiding groove is arranged on the inner surface of the base, and at least one guiding slide is arranged on the outer surface of the cutter.

[0005] According to the opening device of the first aspect, the guide chute comprises a first chute section and a second chute section connected to each other, the first chute section forms a first starting spiral section, and the second chute section forms the second subsequent spiral section. From the axial direction, the first chute section is steeper than the second chute section.

[0006] The opening device according to the first aspect further comprises at least one limiting portion. The at least one limiting portion is arranged in the first chute section of the at least one guide chute and is close to the starting position of the at least one guide chute. The at least one limiting portion is configured to cooperate with the at least one guide slide block when the cutter is not driven by the cap to limit the cutter to its initial position, and is configured to allow the at least one guide slide block to pass over the at least one limiting portion when the cutter is driven by the cap to cut the sealing layer of the package.

[0007] According to the opening device of the first aspect, at least one limiting portion is at least one limiting protrusion.

[0008] The opening device according to the first aspect further comprises at least one stopper, which is arranged in the second slide slot section of at least one guide slide slot and defines the end position of at least one guide slide slot.

[0009] According to the opening device of the first aspect, at least one guide slot includes four guide slots, and the first slot sections of the four guide slots are evenly arranged around the axis. At least one guide slide includes four guide slides, and the four guide slides are evenly arranged on the outer surface of the cutter around the axis and are respectively accommodated in the four guide slots.

[0010] According to the opening device of the first aspect, at least one guide slider protrudes from the outer surface of the cutter and gradually contracts as it moves away from the cutter.

[0011] According to the opening device of the first aspect, the cutting portion of the cutter includes a plurality of cutting teeth, each of which includes a first cutting edge and a second cutting edge located on opposite sides of the cutting tooth. In the rotation direction of the cutter, the first cutting edge is located in front of the second cutting edge, and the first cutting edge and the second cutting edge intersect to form a tip. The first cutting edge includes a first cutting edge head portion close to the tip and a first cutting edge tail portion away from the tip. From the axial direction, the first cutting edge head portion is steeper than the first cutting edge tail portion.

[0012] According to the opening device of the first aspect, the second cutting edge comprises a second cutting edge head portion close to the tip and a second cutting edge tail portion away from the tip, wherein the second cutting edge head portion and the second cutting edge tail portion together form a shape protruding away from the first cutting edge.

[0013] According to the opening device of the first aspect, the driving connection device comprises a push column arranged on the cap and a joint portion arranged on the cutter. The push column cooperates with the joint portion so that the movement of the cap drives the cutter to move toward the sealing layer.

[0014] According to the opening device of the first aspect, two cap threads are provided on the inner surface of the cap for threading the cap to the base, and the starting points of the two cap threads differ by 180 degrees.

[0015] According to a second aspect of the present disclosure, the present disclosure provides a package, which includes a packaging box and an opening device according to the first aspect, wherein a base of the opening device is connected to the packaging box. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1A is a diagram showing a state in which an opening device according to an embodiment of the present disclosure is used on a package;

[0017] Figure 1B yes Figure 1A An exploded view of the opening device shown;

[0018] Figure 2A yes Figure 1A A perspective view of the base of the opening device shown, viewed from the front to the rear;

[0019] Figure 2B yes Figure 1A A perspective view of the base of the opening device shown looking from the back to the front;

[0020] Figure 2C yes Figure 2A A side view of the base shown;

[0021] Figure 2D is along Figure 2C The cross-sectional view of line AA in the figure;

[0022] Figure 3A yes Figure 1A A perspective view of the cap of the opening device shown in the figure, when viewed from bottom to top, from a first viewing angle;

[0023] Figure 3B yes Figure 1A A perspective view of the cap of the opening device shown in the second perspective when viewed from bottom to top;

[0024] Figure 4A yes Figure 1A A perspective view of the cutter of the opening device shown looking from bottom to top;

[0025] Figure 4B yes Figure 4A A top view of the cutter is shown;

[0026] Figure 4C is along Figure 4B The cross-sectional view of line BB in FIG.

[0027] Figure 5A yes Figure 1A A perspective view of the opening device shown in a closed state;

[0028] Figure 5B yes Figure 1AA cross-sectional view showing the opening device in a closed state;

[0029] Fig. 6A yes Figure 1A A perspective view of the opening device shown in the process of opening;

[0030] Figure 6B yes Figure 1A A cross-sectional view of the opening device shown in the process of opening;

[0031] Figure 7 yes Figure 1A A perspective view showing the opening device in an open state. DETAILED DESCRIPTION

[0032] Various specific embodiments of the present disclosure will be described below with reference to the accompanying drawings that form a part of this specification. It should be understood that although terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "top", "bottom", etc., are used in the present disclosure to describe various example structural parts and elements of the present disclosure, these terms are used here only for the purpose of convenience of description and are determined based on the example orientations shown in the accompanying drawings. Since the embodiments disclosed in the present disclosure can be arranged in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations.

[0033] Figure 1A and 1B The overall structure of an opening device 100 according to an embodiment of the present disclosure is shown, wherein: Figure 1A is a diagram showing the opening device 100 in use in the package 1, Figure 1B is an exploded view of the opening device 100 .

[0034] like Figure 1A As shown, the opening device 100 is used to open and close the outlet (not shown) on the packaging box 10 of the package 1. The top of the packaging box 10 is provided with an outlet, and a sealing layer (not shown) is sealed on the outlet. The sealing layer can be cut so that the content in the packaging 1 can be poured out from the outlet. The opening device 100 is made of plastic material, for example. The shape of the packaging box 10 can be Figure 1A Other shapes than shown.

[0035] like Figure 1BAs shown, the opening device 100 comprises a base 110, a cap 120, a cutter 130 and an anti-fouling ring 140. The base 110 is arranged around the sealing layer on the outlet of the packaging box 10 and is located above the sealing layer. The cap 120 is threadedly connected to the base 110 and can be loosened from the base 110 or tightened again on the base 110. The anti-fouling ring 140 is formed integrally with the cap 120, and is interconnected by a dotted weakened connecting portion 145 between the two, and the anti-fouling ring 140 is fixedly connected to the base 110. When the cap 120 is first loosened relative to the base 110, the weakened connecting portion 145 breaks so that the cap 120 is separated from the anti-fouling ring 140. The cutter 130 is arranged between the cap 120 and the base 110. The cutter 130 can move towards the sealing layer under the drive of the cap 120 when the cap 120 is first loosened from the base 110 to cut the sealing layer. To this end, the opening device 100 further includes a driving connection device for connecting the cap 120 with the cutter 130, so that the movement of the cap 120 can drive the cutter 130 to move toward the sealing layer. The opening device 100 further includes a guide device, which connects the cutter 130 with the base 110 and is used to guide the cutter 130 to move along a predetermined path under the drive of the cap 120, so as to cut the sealing layer in the following desired manner.

[0036] Specifically, the predetermined path includes a first starting spiral segment and a second subsequent spiral segment. When moving along the first starting spiral segment and the second subsequent spiral segment, the cutter 130 rotates around the axis X while moving along the axis X of the base 110, and, in response to the cap 120 rotating a specific angle, the distance moved by the cutter 130 in the direction of the axis X when moving along the first starting spiral segment is greater than the distance moved in the direction of the axis X when moving along the second subsequent spiral segment, but the angle of rotation of the cutter 130 around the axis X when moving along the first starting spiral segment is less than the angle of rotation around the axis X when moving along the second subsequent spiral segment.

[0037] According to an embodiment of the present disclosure, the drive connection device includes a push rod 370 (see Figure 3A and 3B ) and the engaging portion 420 (see Figure 4A and 4B ), the guide device includes a guide slot 252 (see Figure 2A and 2D ) and a guide slider 453 (see Figures 4A-4C ), which will be described in detail below. Figures 2A-2D The specific structure of the base 110 is shown, wherein: Figure 2A is a three-dimensional view of the base 110 viewed from the front to the back, Figure 2B is a three-dimensional view of the base 110 viewed from the back to the front, Figure 2C is a side view of the base 110, and Figure 2D is along Figure 2C Sectional view along line AA.

[0038] like Figure 2A and 2B As shown, the base 110 has an axis X. The base 110 includes a cylindrical neck 220 centered on the axis X, and a flange 230 arranged at one axial end of the neck 220. The neck 220 defines an opening 215 for pouring the contents (e.g., beverages) of the package 1. The flange 230 extends outwardly around the neck 220 and away from the axis X, and is used to connect the base 110 to the top of the packaging box 10. The base 110 is arranged around the sealing layer on the packaging box 10, so that when the sealing layer is cut, the outlet on the packaging box 10 covered by the sealing layer is connected to the opening 215 of the base 110, so that the contents in the package 1 can be poured out through the opening 215 of the opening device 110.

[0039] like Figure 2A and 2B As shown, two base threads are provided on the outer surface of the neck 220 of the base 110, namely, a first base thread 260 and a second base thread 270. The first base thread 260 and the second base thread 270 are used to engage with the threads on the cap 110 to threadably connect the cap 120 to the base 110. The cap 120 can thus be rotated around the axis X to be tightened on the base 110, or loosened from the base 110, thereby closing or opening the opening 215 of the base 110.

[0040] The first base thread 260 and the second base thread 270 are two threads independent of each other, and the two threads are staggered. In addition, the angle at which the first base thread 260 and the second base thread 270 extend around the base 110 is less than 360 degrees. Figure 2A As shown, the first base thread 260 has a head end 261 and a tail end 263, and in the axial direction of the base 110, the head end 261 is located above the tail end 263. Figure 2B As shown, the second base thread 270 has a head end 271 and a tail end 273. In the axial direction of the base 110, the head end 271 is located above the tail end 273. The head end 261 of the first base thread 260 and the head end 271 of the second base thread 270 are staggered 180 degrees along the circumferential direction.

[0041] By providing two independent threads and staggering the two threads by 180 degrees, the cap 120 can be opened at a smaller screwing angle while ensuring sufficient thread connection strength, and the space occupied by the threads in the axial direction of the base 110 is smaller. Therefore, compared with a single thread, the threaded cap 120 provided with the above arrangement has a greater rise distance when rotated at the same angle, thereby making the cap 120 easier to open.

[0042] Still like Figure 2A and 2B As shown, four guide grooves 252 are provided on the inner surface of the base 110. Figure 2A Two of the guide slots can be seen in Figure 2B In the figure, two other guide slots can be seen. These four guide slots 252 have substantially the same setting.

[0043] like Figure 2C and 2D As shown, each guide slot 252 includes a first slot section 254 and a second slot section 256 connected to each other. The first slot section 254 is farther away from the flange 230 of the base 110 than the second slot section 256, so the starting position and the end position of the guide slot 252 are respectively located at the ends of the first slot section 254 and the second slot section 256 that are away from each other. The first slot section 254 cooperates with the guide slider 453 disposed on the outer surface of the cutter 130 to define the first starting spiral section in the predetermined path. The second slot section 256 cooperates with the guide slider 453 disposed on the outer surface of the cutter 130 to define the second subsequent spiral section in the predetermined path. From the direction of the axis X, the first slot section 254 is steeper than the second slot section 256. In some embodiments, the tracks formed by the first slot section 254 and the second slot section 256 are both involutes. In other embodiments, the tracks formed by the first slot section 254 and the second slot section 256 can also be other types of curves. The first slide groove section 254 and the second slide groove section 256 are configured so that, in response to the cap 120 rotating a specific angle, the distance that the cutter 130 moves in the direction of the axis X when moving along the first starting spiral section (under the guidance of the first slide groove section 254) is greater than the distance that the cutter 130 moves in the direction of the axis X when moving along the second subsequent spiral section (under the guidance of the second slide groove section 256), but the angle at which the cutter 130 rotates around the axis X when moving along the first starting spiral section (under the guidance of the first slide groove section 254) is less than the angle at which the cutter 130 rotates around the axis X when moving along the second subsequent spiral section (under the guidance of the second slide groove section 256).

[0044] Still like Figure 2A and 2DAs shown, the first slot section 254 extends on the inner surface of the base 110 for a shorter length, while the second slot section 256 extends on the inner surface of the base 110 for a longer length. The first slot sections 254 of the four guide slots 252 are evenly arranged on the inner surface of the base 110 around the axis X.

[0045] A stopper 257 is provided in the first slot section 254 of each guide slot 252. The stopper 257 is arranged close to the starting position of the guide slot 252, and a slot entrance 251 is arranged at the starting position. A holding space is formed between the stopper 257 and the slot entrance 251 for accommodating a guide slider 453 (such as a slider 453) on the outer surface of the cutter 130. Figure 4A 25). The limiting portion 257 is a limiting protrusion protruding from the first chute section 254. When the cutter 130 has not been driven by the cap 120, the limiting portion 257 can cooperate with the guide slider 453 provided on the outer surface of the cutter 130 to keep the guide slider 453 in the holding space between the limiting portion 257 and the chute entrance 251, thereby keeping the cutter 130 in its initial position. In addition, the limiting portion 257 is configured so that when the cutter 130 is driven by the cap 120, the cutter 130 can pass over the limiting portion 257 to move along the guide chute 252. To this end, the height of the limit portion 257 protruding from the first slide groove section 254 is set so that when the cutter 130 has not been driven by the cap 120, the guide slider 453 on the outer surface of the cutter 130 contacts each other with a certain friction force, and when the cutter 130 is driven by the cap 120, the driving force can overcome the friction force, so that the cutter 130 can pass over the limit portion 257.

[0046] like Figure 2D As shown, a stopper 259 is provided in the second slot section 256 of each guide slot 252, and the stopper 259 defines the terminal position of the guide slot 252. The stopper 259 is a component protruding from the second slot section 256, and when the cutter 130 moves in the guide slot 252 until the guide slider 453 on its outer surface hits the stopper 259, the cutter 130 reaches its terminal position. The stopper 259 can keep the cutter 130 at its terminal position.

[0047] Figure 3A and 3B The specific structure of the cap 120 is shown. Figure 3A is a perspective view of the cap 120 of the opening device 100 shown in FIG. 1 when viewed from bottom to top in the first perspective, Figure 3B is a stereogram of the cap 120 from a second viewing angle when viewed from bottom to top, wherein: Figure 3B exist Figure 3A Based on the rotation of a certain angle. Figure 3A and 3BAs shown, the cap 120 has an axis A. When the cap 120 is installed in place on the base 110, the cap 120 is coaxially arranged with the base 110, that is, the axis A of the cap 120 coincides with the axis X of the base 110. The cap 120 includes a circular top cover 310 and a cylindrical side wall 320. The side wall 320 surrounds the edge of the top cover 310 and extends along the axis A direction. A thread 383 is provided on the inner surface of the side wall 320 for engaging with the thread 240 on the base 110. The cap 120 also includes a propulsion column 370, which extends from the top cover 310 toward the base 110 along the axis A direction, and the propulsion column 370 is at least partially accommodated in the accommodation space formed by the cylindrical side wall 320. The propulsion column 370 is separated from the side wall 320 by a certain distance in the radial direction so that the neck 220 of the base 110 can be accommodated between the propulsion column 370 and the side wall 320. As shown in FIG. Figure 3A and 3B As shown, the cap 120 includes three propulsion columns 370, which are symmetrically arranged relative to the axis A. Each propulsion column 370 also extends along the circumferential direction, and the three propulsion columns 370 extend on the same circumference. In some other embodiments, the number of propulsion columns is not limited to three, for example, two.

[0048] like Figure 3B As shown, the push rod 370 is generally in the shape of a sheet and includes a driving edge 372. The driving edge 372 includes a first edge 373 close to the top cover 310 and a second edge 375 away from the top cover 310, and the second edge 375 is connected to the first edge 373. The first edge 373 and the second edge 375 both extend obliquely relative to the axis A, but the inclination of the second edge 375 is less than that of the first edge 373. The driving edge 372 engages with the engagement portion 420 on the cutter 130 (see FIG. 1 ). Figure 4A ), the cutter 130 is driven to move for cutting operation by unscrewing (rotating) the cap 120. When the first segment edge 373 of the driving edge 372 drives the cutter 130, the cutter 130 moves under the guidance of the first slide groove segment 254 of the guide slide groove 252 of the base 110, and when the second segment edge 375 of the driving edge 372 drives the cutter 130, the cutter 130 moves under the guidance of the second slide groove segment 256 of the guide slide groove 252 of the base 110.

[0049] like Figure 3A and 3B As shown, two cap threads 383 are provided on the inner surface of the cap 120, and the arrangement of the two cap threads 383 corresponds to the arrangement of two base threads (ie, the first base thread 260 and the second base thread 270) on the outer surface of the base 110 to achieve threaded engagement between the two.

[0050] Figures 4A-4C The specific structure of the cutter 130 is shown. Figure 4A is a perspective view of the cutter 140 viewed from below, and Figure 4A Also included are enlarged views showing individual cutting teeth. Figure 4B is a top view of the cutter 130, Figure 4C is along Figure 4B Cross-sectional view of line BB in .

[0051] like Figure 4A As shown, the cutter 130 includes a cylindrical cutter body 410 having an axis L. When the cutter 130 is installed in place in the base 110, the axis L of the cutter body 410 coincides with the axis X of the base 110. The cutter 130 includes a cutting portion 435 disposed at an axial end of the cutter body 410. The cutting portion 435 includes a plurality of cutting teeth 460 for cutting the sealing layer of the packaging box 10. The plurality of cutting teeth 460 are arranged on the same circumference, but the circumference is not completely covered with the cutting teeth 460, but has a separation space 480. Specifically, as shown in FIG. Figure 4A As shown, the cutter 130 includes 7 cutting teeth 460, which are arranged in contact with each other, and the separation space 480 is provided between the first and last cutting teeth 460. The 7 cutting teeth roughly occupy three quarters of the circumference, and the separation space 480 roughly occupies one quarter of the circumference. By providing the separation portion 480, the sealing layer can still be partially connected to the packaging after the cutting operation is completed, and will not be completely cut off.

[0052] Each cutting tooth 460 has a tip 462 facing the sealing layer and a first cutting edge 463 and a second cutting edge 465 located on opposite sides of the tip 462, and the first cutting edge 463 and the second cutting edge 465 intersect to form the tip 462. In the rotation direction J1 of the cutter 130, the first cutting edge 463 is located in front of the second cutting edge 465. In addition, the first cutting edge 463 and the second cutting edge 465 are configured so that in the rotation direction J1 of the cutter 130, the tip 462 points forward.

[0053] like Figure 4CAs shown, the first cutting edge 463 includes a first cutting edge head 471 close to the tip 462 and a first cutting edge tail 472 away from the tip 462, and the two are connected to each other. From the direction of the axis L, the first cutting edge head 471 is steeper than the first cutting edge tail 472. The first cutting edge head 471 and the first cutting edge tail 472 together form a first cutting edge 463 that is recessed toward the second cutting edge 465. The second cutting edge 465 includes a second cutting edge head 476 close to the tip 462 and a second cutting edge tail 477 away from the tip 462, and the two are connected to each other. The second cutting edge head 476 and the second cutting edge tail 477 have different inclinations relative to the axis L, and the two together form a second cutting edge 465 that is protruding away from the first cutting edge 463. The tip 462 formed by the first cutting edge 463 and the second cutting edge 465 thus arranged points to the front (in the rotation direction J1 of the cutter 130).

[0054] like Figures 4A-4C As shown in FIG. 1 , the inner surface of the cutter 130 is provided with an engagement portion 420 for engaging with the push pin 370 on the cap 120, so that the cap 120 can drive the cutter 130 to perform a cutting operation when it is loosened. The engagement portion 420 is a rib protruding from the inner surface of the cutter 130. The engagement portion 420 has a driving edge 372 (such as a protruding edge 372) that engages with the push pin 370 of the cap 120. Figure 3B 422 (shown) Figure 4B In some embodiments, the leading edge 422 forms an acute angle with the inner surface of the cutter 130 so that the leading edge 422 and the driving edge 372 can better engage.

[0055] like Figures 4A-4C As shown, a guide slider 453 is provided on the outer surface of the cutter 130, and the number of the guide sliders 453 is the same as the number of the guide slots 252, and each guide slider 453 is engaged with a corresponding guide slot 252. Four guide sliders 453 are evenly arranged on the outer surface of the cutter 130 around the axis J. Each guide slider 453 extends in a direction perpendicular to the axis J (and the axis X) and tapers as it moves away from the cutter 130. Therefore, each guide slider 453 is generally in the shape of a truncated cone. The guide slider 453 is arranged close to the end of the cutter 130 away from the cutting portion 435.

[0056] Figure 5A and 5B Shows Figure 1A The cooperation relationship between the various components when the opening device 100 is in the closed state, wherein: Figure 5A is a three-dimensional diagram of the opening device 100 in a closed state, Figure 5B is a cross-sectional view of the opening device 100 in a closed state.

[0057] like Figure 5A and 5B As shown, when the opening device 100 is in the closed state, the cap 120 is in an initial position that has not been initially loosened, the root of the driving edge 372 on the pushing column 370 of the cap 120 that is connected to the top cover 310 of the cap 120 contacts the front edge 422 of the engaging portion 420 of the cutter 130, and the guide slide block 453 of the cutter 130 is located in the first slide groove section 254 of the guide slide groove 252 of the base 110, and is maintained in its initial position by the limiting portion 257.

[0058] When the package 1 has not been opened, its sealing layer is in an uncut state, and the sealing layer closes the outlet of the packaging box 10. In order to open the outlet of the packaging box 10, first, the sealing layer in the closed state (such as Figure 5A and 5B The cap 120 of the opening device 100 (shown in FIG. 1 ) is initially unscrewed from the base 110 along the direction J1 until the cap 120 can be separated from the base 110. While the cap 120 is being unscrewed, the cap 120 drives the cutter 130 to move toward the sealing layer. The process of unscrewing the cap 120 from the base 110 is divided into two parts. In the first part, the cutter 130 moves along the first starting spiral segment in the predetermined path under the drive of the cap 120, and in the second part, the cutter 130 moves along the second subsequent spiral segment in the predetermined path under the drive of the cap 120.

[0059] During the first part of the unscrewing of the cap 120 from the base 110, the cap 120 moves away from the base 110 along the axis X while rotating. As the cap 120 moves, the first edge 373 of the driving edge 372 on the push rod 370 moves. Figure 5A The front edge 422 of the joint 420 gradually contacts the front edge 422 of the joint 420 in the direction from top to bottom as shown. Figure 5AAs shown, the cutter 130 moves along the first segment edge 373 in the direction from top to bottom. Thus, driven by the cap 120 and guided by the guide device (guide slider 453 and guide slot 252), the cutter 130 moves along the first starting spiral segment in the predetermined path. In the first starting spiral segment, the cutter 130 rotates along the direction J1 around the axis X while moving linearly toward the sealing layer along the axis X, so that the tip 462 of the cutting tooth 460 of the cutter 130 pierces a small hole in the sealing layer. And, with the linear motion and rotational motion of the cutter 130, the first cutting blade head 471 and the second cutting blade head 476 of the cutting tooth 460 will continue to pierce and cut the sealing layer, thereby expanding the hole. Since the first slot segment 254 of the guide slot 252 is set relatively steeply (i.e., the inclination relative to the axis X is small), in the first starting spiral segment, the cutter 130 moves linearly along the axis X toward the sealing layer with a large amplitude, while the amplitude of its rotation around the axis X is small.

[0060] During the second part of the unscrewing of the cap 120 from the base 110, the front edge 422 of the engaging portion 420 engages with the second segment edge 375 of the driving edge 372 on the push rod 370, and the guide slider 453 of the cutter 130 moves in the second slide groove segment 256 of the guide slide groove 252 of the base 110. As the cap 120 is further unscrewed, the second segment edge 375 of the driving edge 372 on the push rod 370 moves in the second slide groove segment 256 of the guide slide groove 252 of the base 110. Figure 5A The front edge 422 of the joint 420 gradually contacts the front edge 422 of the joint 420 in the direction from top to bottom as shown. Figure 5A As shown, the cutter 130 moves along the second segment edge 375 in the direction from top to bottom. Thus, driven by the cap 120 and guided by the guide device (guide slider 453 and guide slot 252), the cutter 130 moves along the second subsequent spiral segment in the predetermined path. In this second subsequent spiral segment, the cutter 130 still moves linearly along the axis X toward the sealing layer while rotating in the direction J1 around the axis X. Since the second slot segment 256 of the guide slot 252 is arranged relatively flat (i.e., the inclination is relatively large relative to the axis X), in the second subsequent spiral segment, the amplitude of the linear movement of the cutter 130 along the axis X toward the sealing layer is relatively small, while the amplitude of its rotation around the axis X is relatively large. Thus, the tail 472 of the first cutting edge 463 of the cutting tooth 460 and the tail 477 of the second cutting edge 465 further cut the sealing layer until the threaded engagement of the cap 120 with the base 110 reaches the end of the stroke, i.e., reaches the end of the stroke. Fig. 6A and 6B Status shown.

[0061] Since the first cutting edge 463 is located ahead of the second cutting edge 465 in the rotation direction J1 , the first cutting edge 460 mainly plays a role in puncturing and cutting the sealing layer.

[0062] Fig. 6A and 6B The opening device 100 is shown in the opening process, wherein: Fig. 6A is a three-dimensional diagram of the opening device 100 in the process of opening, Figure 6B is a cross-sectional view of the opening device 100 in the opening process. Figure 7 yes Figure 1A A perspective view showing the opening device in an open state.

[0063] like Fig. 6A and 6B As shown, when the threaded engagement of the cap 120 and the base 110 reaches the end of the stroke, the front edge 422 of the engagement portion 420 also moves to the end of the second edge 375 of the driving edge 372, and the cap 120 can be removed from the base 110 (as shown in FIG. Figure 7 shown).

[0064] When the device 100 is turned on, Figure 5A and 5B The status shown reaches Fig. 6A and 6B During the process of the state shown, as the cutter 130 gradually cuts the sealing layer, the cutter 130 gradually enters the packaging box 10 and folds the cut sealing layer toward the outside thereof. Since the sealing layer is connected to the package at a small section and is blocked outside the cutter 130, the sealing layer will not fall into the package and will not block the contents in the package from being poured out from the outlet.

[0065] The inventors of the present application have discovered that there are three schemes for driving the cutter in the existing opening device, as follows: in the first scheme, when the cutter cuts the sealing layer, it first performs a pure linear motion and then a pure rotational motion; in the second scheme, when the cutter cuts the sealing layer, it first performs a spiral motion and then a pure rotational motion; in the third scheme, when the cutter cuts the sealing layer, it first performs a pure linear motion and then a spiral motion.

[0066] After observation and research, the inventors of the present disclosure found that the above existing cutter movement methods have shortcomings. The reason is that the process of cutting the sealing layer is divided into two stages: (1) the stage of puncturing the sealing layer with a cutter, and in this stage it is hoped that the punctured sealing layer has a wider puncture opening to facilitate the next step of cutting, and in this stage it is hoped that the cutter has a larger downward (axial) force to make the cutting at this stage easier; (2) the stage of cutting the sealing layer from the punctured part along the rotation direction with the cutter. Although the cutter has different functions in these two cutting stages, a downward (axial) force is required, especially considering that the cutting portion of the cutter is provided with generally triangular cutting teeth along its circumference.

[0067] The inventor now specifically analyzes the defects of the three driving schemes in the prior art as follows:

[0068] The defects of the first solution include: (i) when the cutter is used to puncture the sealing layer, the cutter can only move linearly downward along the axial direction without rotational motion, the punctured portion on the sealing layer is small, and the blade of the cutting tooth cannot fully play its role; (ii) when the cutter is used to cut from the punctured portion of the sealing layer in the rotational direction, since only pure rotational motion is performed and no linear motion is performed linearly downward along the axial direction, the cutting resistance is relatively large.

[0069] The defects of the second solution include: (i) it does not take into account the need to apply downward force in both the puncture stage and the cutting stage, and (ii) in a simple horizontal rotation, the cutting resistance is large because no downward force is applied.

[0070] The defects of the third solution include: (i) it does not take into account that downward force needs to be applied in both the puncturing stage and the cutting stage, and the entire sealing layer cutting process cannot be optimized.

[0071] In order to overcome the defects of the above three solutions in the prior art, the technical solution of this application is as follows:

[0072] The solution disclosed in the present invention is to divide the predetermined motion trajectory of the cutter into two sections, namely, a first starting spiral section and a second subsequent spiral section, by setting a guide slot on the base. When moving along the first starting spiral section and the second subsequent spiral section, the cutter rotates around the axis X while moving along the axis X of the base. In addition, in response to the cap rotating a specific angle, the distance moved by the cutter in the direction of the axis X when moving along the first starting spiral section is greater than the distance moved in the direction of the axis X when moving along the second subsequent spiral section, but the angle of rotation of the cutter around the axis X when moving along the first starting spiral section is less than the angle of rotation around the axis X when moving along the second subsequent spiral section.

[0073] By adopting the above technical solution, the present invention overcomes the defects of the above prior art, because the setting of the present invention adapts to the different needs of the puncture stage and the cutting stage of the sealing layer, and optimizes the cutting process of the sealing layer. Specifically, in the stage of mainly puncturing the sealing layer (i.e., the movement of the cutter along the first starting spiral section), the cutter not only makes a linear motion along the axis toward the sealing layer, but also makes a rotational motion around the axis, and the amplitude of the linear motion is large, and the amplitude of the rotational motion is small, so that the driving force of the cap is mainly used to drive the cutter to move linearly, so as to facilitate the puncture operation, but because the cutter also makes a rotational motion, it is easier to puncture the sealing layer. In the stage of mainly cutting the sealing layer (i.e., the movement of the cutter along the second subsequent starting spiral section), the cutter not only makes a rotational motion around the axis, but also makes a linear motion along the axis toward the sealing layer, and the amplitude of the rotational motion is large, and the amplitude of the linear motion is small, so that the driving force of the cap is mainly used to drive the cutter to move linearly, so as to facilitate the cutting operation, but because the cutter also makes a linear motion, it is easier to cut the sealing layer.

[0074] In addition, the present disclosure sets the cutting edge of each cutting tooth so that the head of the first cutting edge located in front of the rotation direction is steeper and the tail is relatively gentle, which is more conducive to the puncturing and cutting operations of the cutting teeth. This is because, in the stage of mainly puncturing the sealing layer (i.e., the movement of the cutter along the first starting spiral section), the head of the first cutting edge plays a major role, and the first cutting edge head is set to be steeper to make the puncturing operation easier, and in the stage of mainly cutting the sealing layer (i.e., the movement of the cutter along the second subsequent starting spiral section), the tail of the first cutting edge plays a major role, and the tail of the first cutting edge is set to be relatively gentle to make the cutting operation easier. In addition, the second cutting edge of the present disclosure is set to be protruding away from the first cutting edge, so that the cutting tooth can still maintain a certain strength when the first cutting edge is concave toward the second cutting edge.

[0075] Although the present disclosure has been described in conjunction with the examples of the embodiments summarized above, various alternatives, modifications, changes, improvements and / or substantially equivalent solutions, whether known or currently or foreseeable in the near future, may be apparent to those of ordinary skill in the art. In addition, the technical effects and / or technical problems described in this specification are exemplary rather than restrictive; so the disclosure in this specification may be used to solve other technical problems and have other technical effects and / or may solve other technical problems. Therefore, the examples of the embodiments of the present disclosure as stated above are intended to be illustrative rather than restrictive. Various changes may be made without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is intended to include all known or earlier developed alternatives, modifications, changes, improvements and / or substantially equivalent solutions.

Claims

1. An opening device (100) for a package, characterized in that include: a base (110) defining an opening (215) having an axis (X); a cap (120) threadably connected to the base (110) to close and open the opening (215); a cutter (130), the cutter (130) being cylindrical and having a cutting portion (435) disposed at a distal end thereof, the cutter (130) being at least partially disposed in the opening (215) of the base (110); a drive connection device, the drive connection device connects the cutter (130) to the cap (120) and is configured so that when the cap (120) is initially loosened to open the opening (215), the rotation of the cap (120) drives the cutter (130) to move to cut the sealing layer of the package; a guide device, the guide device connects the cutter (130) to the base (110) and is configured to guide the cutter (130) to move along a predetermined path under the drive of the cap (120); wherein the predetermined path comprises a first starting spiral segment and a second subsequent spiral segment, and when moving along the first starting spiral segment and the second subsequent spiral segment, the cutter (130) moves along the axis (X) and rotates around the axis (X); and In which, in response to the cap (120) rotating a specific angle, the distance moved by the cutter (130) in the direction of the axis (X) when moving along the first starting spiral segment is greater than the distance moved in the direction of the axis (X) when moving along the second subsequent spiral segment, but the angle of rotation of the cutter (130) around the axis (X) when moving along the first starting spiral segment is smaller than the angle of rotation around the axis (X) when moving along the second subsequent spiral segment.

2. The opening device (100) according to claim 1, characterized in that: The guide device comprises at least one guide slot (252) and at least one guide slide block (453) accommodated in the at least one guide slot (252), wherein the at least one guide slot (252) is arranged on the inner surface of the base (110), and the at least one guide slide block (453) is arranged on the outer surface of the cutter (130).

3. The opening device (100) according to claim 2, characterized in that: The guide chute (252) comprises a first chute section (254) and a second chute section (256) connected to each other, the first chute section (254) forming the first starting spiral section, and the second chute section (256) forming the second subsequent spiral section; Wherein, viewed from the axis (X) direction, the first slide groove section (254) is steeper than the second slide groove section (256).

4. The opening device (100) according to claim 3, characterized in that Also includes: At least one limiting portion (257), the at least one limiting portion (257) being arranged in the first slide groove section (254) of the at least one guiding slide groove (252) and close to the starting position of the at least one guiding slide groove (252); Wherein, the at least one limiting portion (257) is configured to cooperate with the at least one guide slider (453) to limit the cutter (130) to its initial position when the cutter (130) has not been driven by the cap (120), and is configured to allow the at least one guide slider (453) to pass over the at least one limiting portion (257) to cut the sealing layer of the package when the cutter (130) is driven by the cap (120).

5. The opening device (100) according to claim 4, characterized in that: The at least one limiting portion (257) is at least one limiting protrusion.

6. The opening device (100) according to claim 3, characterized in that Also includes: At least one stop portion (259), wherein the at least one stop portion (257) is arranged in the second slide groove section (256) of the at least one guide slide groove (252) and defines an end position of the at least one guide slide groove (252).

7. The opening device (100) according to claim 3, characterized in that: The at least one guide slot (252) comprises four guide slots (252), and the first slot sections (254) of the four guide slots (252) are evenly arranged around the axis (X); The at least one guide slider (453) includes four guide sliders (453), and the four guide sliders (453) are evenly arranged on the outer surface of the cutter (130) around the axis (X) and are respectively accommodated in the four guide slots (252).

8. The opening device (100) according to claim 2, characterized in that: The at least one guide slide (453) protrudes from the outer surface of the cutter (130) and gradually contracts as it moves away from the cutter (130).

9. The opening device (100) according to claim 1, characterized in that: The cutting portion (435) of the cutter (130) comprises a plurality of cutting teeth (460), each cutting tooth (460) comprising a first cutting edge (463) and a second cutting edge (465) located on opposite sides of the cutting tooth (460), the first cutting edge (463) being located in front of the second cutting edge (465) in the rotation direction of the cutter (130), and the first cutting edge (463) and the second cutting edge (465) intersecting to form a tip (462); Wherein, the first cutting blade (463) includes a first cutting blade head (471) close to the tip (462) and a first cutting blade tail (472) away from the tip (462), and wherein, viewed from the axis (X) direction, the first cutting blade head (471) is steeper than the first cutting blade tail (472).

10. The opening device (100) according to claim 9, characterized in that: The second cutting blade (465) includes a second cutting blade head (476) close to the tip (462) and a second cutting blade tail (477) away from the tip (462), wherein the second cutting blade head (476) and the second cutting blade tail (477) together form a shape protruding away from the first cutting blade (463).

11. The opening device (100) according to claim 1, characterized in that: The driving connection device includes a propulsion column (370) arranged on the cap (120) and a coupling portion (420) arranged on the cutter (130), and the propulsion column (370) cooperates with the coupling portion (420) so that the movement of the cap (120) drives the cutter (130) to move toward the sealing layer.

12. The opening device (100) according to claim 1, characterized in that: Two cap threads (383) are provided on the inner surface of the cap (120) for threadedly connecting the cap (120) to the base (110), wherein the starting points of the two cap threads (383) differ by 180 degrees.

13. A package (1), characterized in that include: Packaging box (10); as well as According to the opening device (100) according to any one of the preceding claims 1 to 12, the base (110) of the opening device (100) is connected to the packaging box (10).

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