Can lids, can bodies and filled cans

Abstract

To provide a can tip that intermittently generates a breaking sound of a score when opened.SOLUTION: There is provided a can top comprising: a panel member 10; an opening part 20 provided in the panel member; a tab 30 which is provided in the panel member and used to open the opening part; a main score 40 having an initial breaking part 41 which is broken by lifting the tab from its initial position, and a latter breaking part 42 which is broken in opening operation after the initial breaking part is broken; and oscillation parts 60a to 60e which are oscillated to intermittently generate a breaking sound of the latter breaking part. There may be provided a can body that comprises the can top and a container body part fitted with the can top.SELECTED DRAWING: Figure 1A

Description

[Technical Field]

[0001] The present invention relates to a can lid, a can body, and a filled can. [Background technology]

[0002] BACKGROUND ART Conventionally, can lids that are opened by operating a tab are known (see, for example, Patent Document 1). [Prior art document] [Patent documents] [Patent Document 1] Japanese Patent Application Laid-Open No. 11-334735 [Patent Document 2] Japanese Patent Publication No. 8-029779 [Patent Document 3] Japanese Patent Application Laid-Open No. 2-008401 [Patent Document 4] Japanese Patent Application Laid-Open No. 10-101104 Summary of the Invention [Problem to be solved by the invention]

[0003] To provide a can lid which intermittently emits a score breaking sound when opened. [Means for solving the problem]

[0004] In a first aspect of the present invention, there is provided a can lid comprising a panel member, an opening provided in the panel member, a tab provided on the panel member for opening the opening, a main score having an initial breaking portion that is broken by lifting the tab from its initial position, and a later breaking portion that is broken during an opening operation after the initial breaking portion is broken, and an oscillator that oscillates to intermittently produce a breaking sound of the later breaking portion.

[0005] The latter breaking portion may have a predetermined first thickness, and the oscillation portion may be provided in the latter breaking portion and have a second thickness different from the first thickness.

[0006] The second thickness may be greater than the first thickness and may be 105% or more and 130% or less of the first thickness.

[0007] The second thickness may be thinner than the first thickness and may be 80% or more and 95% or less of the first thickness.

[0008] The oscillation section may be provided in the latter breaking section and may have a second thickness different from the first thickness and a third thickness different from the first thickness and the second thickness.

[0009] The latter breaking portion may have a predetermined first width, and the oscillation portion may be provided in the latter breaking portion and have a second width different from the first width.

[0010] The oscillation section may be provided on the panel member and may have a protruding section that protrudes from the front surface or the back surface of the panel member.

[0011] The oscillation section may have a step section that is a step provided in the latter breaking section.

[0012] At least a part of the oscillation section may be provided on the panel member.

[0013] The can lid may include a back surface coating layer provided on the back surface of the panel member and having a predetermined fourth thickness. The oscillation portion may be provided in the back surface coating layer at a position corresponding to the back side of the final breaking portion and have a fifth thickness different from the fourth thickness.

[0014] The can lid may include a back surface coating layer provided on the back surface of the panel member and having a predetermined first material, and the oscillation portion may be provided in the back surface coating layer at a position corresponding to the back side of the final break portion and having a second material having a strength different from that of the first material.

[0015] The oscillator may have a branch score provided on the panel member and connected to the final breaking portion.

[0016] The oscillation portion may be provided in the latter breaking portion, and may have a substantially straight portion and a substantially apex portion when viewed from above the plane of the panel member.

[0017] The oscillation section may have a first oscillation region that emits the breaking sound at predetermined intervals along the later breaking section, and a second oscillation region that emits the breaking sound at intervals different from those of the first oscillation region along the later breaking section.

[0018] The latter breaking portion may have a first path and a second path that are respectively broken when the tab is opened, and the oscillator may emit breaking sounds for the first path and the second path.

[0019] The can lid may emit an opening sound made up of a rupture sound of the initial rupture portion and a rupture sound of the later rupture portion.

[0020] In a second aspect of the present invention, there is provided a can body including the can lid and a container body to which the can lid is attached.

[0021] In a third aspect of the present invention, there is provided a filled can in which a predetermined content is filled in the can body.

[0022] The above summary of the invention does not list all of the necessary features of the present invention, and subcombinations of these features may also constitute inventions. [Brief explanation of the drawings]

[0023] [Figure 1A] An example of the configuration of the can body 200 is shown. [Figure 1B] An example of a cross section of a can lid 100 is shown. [Figure 2A] 4 is a diagram for explaining an initial breaking portion 41 and a later breaking portion 42. FIG. [Figure 2B] 10A and 10B are diagrams for explaining the state of an initial breaking portion 41 before and after breaking. [Figure 2C] 10A and 10B are diagrams for explaining the state of the latter breaking portion 42 before and after breaking. [Figure 3A] A modified example of the can body 200 is shown. [Figure 3B] 1 shows an example of a cross section in the vicinity of the latter fracture portion 42. [Figure 3C] 1 shows an example of a cross section of a region of the latter breaking portion 42 where the oscillation portion 60 is provided. [Figure 3D] 1 shows an example of a cross section of an oscillation section 60 having a side wall section 62. [Figure 4A] 10 is a diagram for explaining how the fracture of the latter fracture portion 42 progresses. FIG. [Figure 4B] 10 is an example of a sound waveform of an opening sound generated when the can lid 100 is opened. [Figure 5A] 10A and 10B are diagrams for explaining how fracture progresses in a latter fracture portion 542 of the comparative example. [Figure 5B] 10 is an example of a sound waveform of an opening sound generated when a can lid of a comparative example is opened. [Figure 6A] A modified example of the can body 200 is shown. [Figure 6B] 1 shows an example of a cross section in the vicinity of the latter fracture portion 42. [Figure 6C] 1 shows an example of a cross section of a region of the latter breaking portion 42 where the oscillation portion 60 is provided. [Figure 6D] 10 is a diagram for explaining how the fracture of the latter fracture portion 42 progresses. FIG. [Figure 7A] A modified example of the can body 200 is shown. [Figure 7B] 1 shows an example of a cross section in the vicinity of the latter fracture portion 42. [Figure 7C] 1 shows an example of a cross section of a region of the latter breaking portion 42 where the oscillation portion 60 is provided. [Figure 8A] A modified example of the can body 200 is shown. [Figure 8B] 10 is a diagram for explaining how the fracture of the latter fracture portion 42 progresses. FIG. [Figure 8C] 10 shows a modified example of the protruding portion 63. [Figure 9A] A modified example of the can body 200 is shown. [Figure 9B]10 is a diagram for explaining how the fracture of the latter fracture portion 42 progresses. FIG. [Figure 10A] A modified example of the can body 200 is shown. [Figure 10B] A modified example of the can body 200 is shown. [Figure 11] A modified example of the can body 200 is shown. [Figure 12] A modified example of the can body 200 is shown. [Figure 13] A modified example of the can body 200 is shown. [Figure 14A] A modified example of the can body 200 is shown. [Figure 14B] An example of a perspective view of a can body 200 is shown. [Figure 15] 10A and 10B are diagrams for explaining the states of the initial breaking portion 41 and the auxiliary breaking portion 43 before and after breaking. [Figure 16] A modified example of the can body 200 is shown. [Figure 17] An example of a can body 200 is shown. [Figure 18] An example of the configuration of a filled can 300 is shown. DETAILED DESCRIPTION OF THE INVENTION

[0024] The present invention will be described below through embodiments of the invention, but the following embodiments do not limit the scope of the invention according to the claims. Furthermore, not all of the combinations of features described in the embodiments are necessarily essential to the solution of the invention.

[0025] 1A shows an example of the configuration of a can body 200. The can body 200 includes a container body 210 and a can lid 100. The can body 200 in this example is a metal can for beverages, but is not limited to this. The can body 200 may also be a metal can for food.

[0026] The can lid 100 is attached to the container body 210 and functions as a lid for the openable can body 200. The container body 210 is the can body of the can body 200. A bottom lid may be provided on the container body 210. The can lid 100 includes a panel member 10, an opening 20, a tab 30, a rivet 35, a main score 40, and a secondary score 50.

[0027] The panel member 10 is a generally plate-shaped member provided on the top surface of the container body 210. The panel member 10 has an inner panel portion 12 and an outer panel portion 14. The inner panel portion 12 is provided inside the outer panel portion 14. The outer panel portion 14 is provided to surround the outer periphery of the area where the tab 30, main score 40, etc. are provided. By providing the inner panel portion 12, distortion caused when forming scores such as the main score 40 can be suppressed. Note that any letters and figures may be written on the panel member 10 by providing it with an indented surface.

[0028] The opening 20 is provided in the panel member 10 and is opened in response to the opening operation of the tab 30. In other words, the can lid 100 functions as an easy-open-end can lid that does not require a can opener. The opening 20 may function as a drinking spout for drinking the beverage filled in the can body 200. The opening 20 may be part of the inner panel portion 12. The opening 20 may be formed with an annular protrusion to increase rigidity.

[0029] The tab 30 is provided on the panel member 10 and is used to open the opening 20. The tab 30 is fixed to the panel member 10 by a rivet 35 provided on the panel member 10. A recess 16 may be provided near the tab 30 to make it easier to hook a finger when lifting the tab 30 from its initial position.

[0030] The main score 40 is a score that breaks when the tab 30 is raised from its initial position and an opening operation is performed. The main score 40 is formed by processing the panel member 10. The main score 40 has an initial breaking portion 41 and a later breaking portion 42.

[0031] The initial breaking portion 41 is broken when the tab 30 is pulled up from its initial position. The initial breaking portion 41 is a main score 40 near the rivet 35. By providing the initial breaking portion 41, it is possible to prevent the contents of the can body 200 from spraying out when the opening 20 is opened. The initial breaking portion 41 will be described later.

[0032] The final breaking portion 42 is broken during the opening operation after breaking the initial breaking portion 41. The opening operation refers to lifting the tab 30 to break the initial breaking portion 41, and then further lifting the tab 30 to open the opening 20. The final breaking portion 42 may be connected to the initial breaking portion 41.

[0033] The secondary score 50 is a score provided adjacent to the main score 40. In this example, the secondary score 50 is provided inside the main score 40. The secondary score 50 may be provided in the inner panel portion 12. By providing the secondary score 50, the rigidity in the vicinity of the main score 40 is improved, making it easier to open the opening 20.

[0034] The oscillator 60 oscillates to intermittently generate breaking sounds of the latter breaking portion 42. In this example, the oscillator 60 includes five oscillators 60a to 60e along the latter breaking portion 42. The oscillators 60 may be arranged at any intervals along the latter breaking portion 42. The specific structure of the oscillator 60 will be described later.

[0035] Oscillating section 60 may be a hard-to-break section that is more difficult to break than later breaking section 42, or an easy-to-break section that is more easily broken than later breaking section 42. By changing the ease of breaking of later breaking section 42, the sound pressure (loudness), pitch (height) and tone of the opening sound can be changed, allowing any opening sound to be emitted from can lid 100. For example, if the interval between occurrences of the breaking sounds is short, the opening sound will be higher, and if the interval between occurrences of the breaking sounds is long, the opening sound will be lower.

[0036] 1B shows an example of a cross section of a can lid 100. The can lid 100 has a curled portion 70, a panel wall portion 72, and an annular groove 74.

[0037] The curled portion 70 is joined to the container body 210 by double seaming. In double seaming, the curled portion 70 wraps around and crimps the flange of the container body 210, joining the can lid 100 and the container body 210. The panel wall 72 is provided between the curled portion 70 and the panel member 10 and forms the side wall of the can lid 100. The annular groove 74 is provided on the outer periphery of the panel member 10 and suppresses deformation of the can lid 100 when the can is filled with contents with high internal pressure, such as carbonated beverages.

[0038] 2A is a diagram for explaining the initial breaking portion 41 and the later breaking portion 42. In this figure, the tab 30 is omitted in order to illustrate the initial breaking portion 41.

[0039] The initial breaking portion 41 is provided adjacent to the rivet 35. In this example, the initial breaking portion 41 has a semicircular shape that follows the outer periphery of the rivet 35. In this example, the initial breaking portion 41 is the region between points P1 and P2 of the main score 40. In this example, points P1 and P2 are points where the direction of travel of the main score 40 changes, but the positions of points P1 and P2 are not limited to these. In other words, the initial breaking portion 41 may be any portion that breaks first when the tab 30 is pulled up, and the ends of the initial breaking portion 41 are not limited to points P1 and P2.

[0040] The later breaking portion 42 is a region of the main score 40 that breaks after the initial breaking portion 41 breaks. In this example, the later breaking portion 42 is provided after point P2 in the direction in which the main score 40 breaks. The later breaking portion 42 may be a score provided continuously with the initial breaking portion 41. In this example, the later breaking portion 42 is formed in a substantially circular shape along the drinking spout, but is not limited to this.

[0041] 2B is a diagram for explaining the state before and after the rupture of the initial rupture portion 41. This diagram is an enlarged cross-sectional view of the periphery of the tab 30 and the rivet 35.

[0042] When the tab 30 is raised to lift the rivet 35, the opening 20 is pushed downward by the principle of leverage. Before the initial rupture portion 41 breaks, the tip of the tab 30 serves as a fulcrum, and the rivet 35 serves as a point of application. The initial rupture portion 41 breaks due to shear stress generated by the opening 20 being pushed down and the rivet 35 being lifted. Because no notch has formed in the panel member 10 before the initial rupture portion 41 breaks, a strong force is required to break the initial rupture portion 41. Therefore, before the initial rupture portion 41 breaks, a large elastic strain is generated in the panel member 10, including the opening 20. When the initial rupture portion 41 breaks, this strain is released, causing vibrations in the panel member 10 and a loud breaking sound. Furthermore, if the can body 200 is filled with a high-pressure content, such as a carbonated beverage, the rupture of the initial rupture portion 41 causes the gas inside to rapidly escape. At this time, the sound of gas leaking out is generated at the same time as the breaking sound.

[0043] It should be noted that the later breaking portion 42 does not have to be broken after the initial breaking portion 41 is broken by raising the tab 30 and before the opening operation of the opening 20. After the initial breaking portion 41 is broken, the rivet 35 serves as a fulcrum and the tip of the tab 30 serves as a point of action, causing the later breaking portion 42 to break.

[0044] 2C is a diagram for explaining the state before and after the rupture of the latter rupture portion 42. This diagram is an enlarged cross-sectional view of the periphery of the latter rupture portion 42.

[0045] The panel member 10 includes an inner panel portion 111 and an outer panel portion 112. The inner panel portion 111 is the panel member 10 on the side where the opening 20 is provided relative to the final breaking portion 42. The outer panel portion 112 is the panel member 10 on the side where the outer panel portion 14 is provided relative to the final breaking portion 42. The outer panel portion 112 may include a portion of the inner panel portion 12.

[0046] In this specification, the cross section of the can lid 100 may be described using the X, Y, and Z axes. The X-axis direction may be the direction in which the main score 40 breaks. Since the direction in which the main score 40 breaks changes depending on the position of the main score 40, the X-axis direction may also change depending on the position of the main score 40. The Y-axis direction may be perpendicular to the X-axis direction. The side of the main score 40 on which the outer panel portion 112 is provided may be the positive side in the Y-axis direction, and the side of the main score 40 on which the inner panel portion 111 is provided may be the negative side in the Y-axis direction. The Z-axis direction may be the height direction of the can body 200. In other words, the Z-axis direction may be perpendicular to the top or bottom surface of the panel member 10. In this example, the side of the can body 200 on which the can lid 100 is provided is the positive side in the Z-axis direction.

[0047] When the tip of the tab 30 presses down on the inner panel portion 111, elastic strain Es occurs around the final break portion 42. When the final break portion 42 breaks due to shear stress, a breaking sound is generated due to vibrations caused when the elastic strain around the final break portion 42 returns. By providing the oscillator 60, the can lid 100 can intentionally generate a breaking sound due to the generation and release of such elastic strain. At this time, the greater the generated elastic strain, the more likely it is that a louder breaking sound will be generated. Furthermore, the greater the amount of elastic strain released, the more likely it is that a louder breaking sound will be generated.

[0048] Fig. 3A shows a modified example of the can body 200. The oscillation section 60 of this example has an oscillation processed section 61. In this example, differences from the can body 200 of Fig. 1A will be particularly described.

[0049] The oscillation processing section 61 is provided near the latter fracture portion 42. The oscillation section 60 in this example has a plurality of oscillation sections 60 provided at arbitrary intervals along the latter fracture portion 42. The plurality of oscillation sections 60 may be provided at equal intervals along the latter fracture portion 42, or may be provided at different intervals. The plurality of oscillation sections 60 may be arranged so that the intervals between them gradually increase along the latter fracture portion 42, or so that the intervals between them gradually decrease along the latter fracture portion 42.

[0050] At least a portion of the oscillation section 60 may be provided on the panel member 10. In this example, the oscillation processing section 61 is provided outside the latter breaking section 42. The oscillation processing section 61 may also be provided inside the latter breaking section 42. The specific structure of the oscillation processing section 61 will be described later.

[0051] 3B shows an example of a cross section in the vicinity of the latter breaking portion 42. This figure is a cross section of a region of the latter breaking portion 42 where the oscillation portion 60 is not provided.

[0052] The final breaking portion 42 may be a recess formed in the panel member 10 using a score blade with a predetermined cutting edge shape. In this example, the final breaking portion 42 has a trapezoidal cross section in which the upper base is larger than the lower base in the YZ cross section, but is not limited to this. The final breaking portion 42 may have a polygonal cross section formed by a combination of straight lines, such as a trapezoid, or may have a cross section formed by using curves.

[0053] The panel member 10 has a predetermined thickness D10. The thickness D10 of the panel member 10 may be 0.1 mm or more and 0.6 mm or less. For example, the thickness D10 of the panel member 10 is 0.235 mm. The thicknesses of the inner panel portion 111 and the outer panel portion 112 may both be the thickness D10.

[0054] The final breaking portion 42 has a predetermined first thickness D1. In this example, the final breaking portion 42 has the first thickness D1 that is thinner than the thickness D10 of the panel member 10. The first thickness D1 may be 0.05 mm or more and 0.5 mm or less. The first thickness D1 may be 0.1 mm, 0.09 mm, or 0.08 mm.

[0055] If the thickness of the oscillation section 60 is made thicker than the latter breaking section 42, it becomes difficult to break, and the accumulated elastic strain increases, making it more likely to produce a loud breaking sound.

[0056] 3C shows an example of a cross section of a region of the latter breaking portion 42 where the oscillation portion 60 is provided. The oscillation portion 60 of this example has an oscillation-processed portion 61.

[0057] The oscillation-processed portion 61 is a recessed region provided adjacent to the final breaking portion 42. By providing the oscillation-processed portion 61, material of the panel member 10 is gathered, deforming the final breaking portion 42 so that the thickness thereof increases. The oscillation-processed portion 61 may be formed by coining the panel member 10 after forming the final breaking portion 42. A compressive force is generated in the final breaking portion 42 during the coining process, forming the final breaking portion 42 with a second thickness D2. This allows the formation of a break-resistant portion as the oscillation portion 60 that is more difficult to break than the other final breaking portions 42. The oscillation-processed portion 61 in this example is formed in the outer panel portion 112, but it may also be formed in the inner panel portion 111.

[0058] The second thickness D2 is the thickness of the oscillation section 60 at the final breakage section 42. The second thickness D2 is different from the first thickness D1. The second thickness D2 may be thicker than the first thickness D1. The second thickness D2 may be 105% or more and 130% or less of the first thickness D1. The second thickness D2 may be 0.06 mm or more and 0.6 mm or less. The second thickness D2 may be 0.11 mm, 0.099 mm, or 0.088 mm.

[0059] The oscillator 60 may have a third thickness D3 different from the first thickness D1 and the second thickness D2. The oscillators 60a to 60e may have different thicknesses. The oscillators 60a to 60e may be designed so that their thickness gradually increases as the fracture progresses, or may be designed so that their thickness gradually approaches the first thickness D1 as the fracture progresses. Since the latter fracture portion 42 becomes gradually less likely to fracture as the fracture progresses, the volume can be balanced by reducing the thickness of the oscillator 60.

[0060] 3D shows an example of a cross section of an oscillation section 60 having a side wall portion 62. This figure shows an XZ cross section of the oscillation section 60. The latter breaking portion 42 has a region with a first thickness D1 and a second thickness D2.

[0061] The side wall 62 is provided at the boundary between the region with the first thickness D1 and the region with the second thickness D2. That is, the final breaking portion 42 may have a thickness that changes from the first thickness D1 to the second thickness D2 so as to have the side wall 62. The inclination of the side wall 62 with respect to the XY plane may be constant or may vary.

[0062] 4A is a diagram for explaining the progression of fracture in the latter fracture portion 42. In this example, a case will be described in which the oscillation portion 60 is a fracture-resistant portion that is more difficult to fracture than the latter fracture portion 42.

[0063] In state (a), the opening operation of the tab 30 generates a stress F in the fracture tip region of the latter fracture portion 42 that is counter to the stress F42 required for fracture of the latter fracture portion 42. In state (b), the opening operation of the tab 30 applies a larger stress F until the stress F60 required for fracture progression of the oscillation portion 60 acts, and elastic strain accumulates near the latter fracture portion 42. In state (c), when a stress F greater than the stress F60 required for fracture progression of the oscillation portion 60 is applied, fracture of the oscillation portion 60 progresses. As fracture of the oscillation portion 60 progresses, the fracture also progresses to the further latter fracture portion 42, so the accumulated elastic strain is suddenly released and a fracture sound is generated.

[0064] 4B is an example of an audio waveform of the opening sound emitted when the can lid 100 is opened. The vertical axis represents volume, and the horizontal axis represents time. The opening sound of the can lid 100 may be composed of the breaking sound of the initial breaking portion 41 and the breaking sound of the later breaking portion 42.

[0065] Initial opening sound S41 is a rupture sound emitted when initial rupture portion 41 ruptures. If the content of can body 200 is a carbonated beverage, initial opening sound S41 may include a "psh" sound of gas being released.

[0066] The late opening sound S60 is a breaking sound emitted when the late breaking portion 42 breaks near the oscillator 60. The late opening sound S60 may be a sound perceived as a single sound. The can lid 100 of this example emits breaking sounds S60a to S60e near the oscillators 60a to 60e, respectively. In this example, the late opening sound S60 is composed of multiple breaking sounds S60a to S60e, but because they are generated in a short period of approximately 0.055 seconds, they are perceived as a single sound. The breaking sounds S60a to S60e may be generated at approximately equal intervals. For example, if breaking sounds occur at intervals of approximately 0.014 seconds, they constitute a frequency of approximately 70 Hz. By shortening the interval between the breaking sounds, an opening sound with a higher pitch can be generated. By lengthening the interval between the breaking sounds, an opening sound with a lower pitch can be generated. The opening sound of the can lid 100 may include a sound S20 that is generated when the rupture of the latter rupture portion 42 is completed and the opening portion 20 is pushed down.

[0067] The breaking sound S60 may gradually increase as the breaking of the latter breaking portion 42 progresses. That is, as the oscillator 60 moves away from the position where the tab 30 presses down on the panel member 10, the restraining force of the panel member 10 decreases, and stress concentration on the score is alleviated, making it less likely to break. Therefore, the amount of operation of the tab 30 required to break the score increases, and the amount of strain until the score breaks increases, which tends to make the breaking sound louder.

[0068] The tone of the opening sound of the can lid 100 may be further adjusted by changing the thickness of the oscillator 60 in the latter breaking portion 42. Changing the thickness of the oscillator 60 changes the amount of elastic strain that occurs as the breaking of the latter breaking portion 42 progresses, and therefore the volume of the breaking sound that occurs when the elastic strain is released can be adjusted. For example, by gradually changing the third thickness D3 of the oscillators 60b to 60e in the latter breaking portion 42 from the second thickness D2 of the oscillator 60a to approach the first thickness D1, the volume of the breaking sounds S60a to S60e, which differed in this example, can be adjusted to a constant value.

[0069] In this way, the can lid 100 can emit an opening sound made up of any breaking sound by adjusting the shape and arrangement of the oscillator 60. Note that the sound pressure, pitch, and tone of the opening sound can be adjusted by providing the can lid 100 with a difficult-to-break portion or an easy-to-break portion, so the structure of the oscillator 60 is not limited to one that adjusts the thickness.

[0070] 5A is a diagram illustrating the progression of fracture in a later fracture portion 542 of the comparative example. A later fracture portion 542 is formed in a panel member 510 of the comparative example. In this example, too, by pressing down on opening 520 with tab 30, later fracture portion 542 can be broken to open opening 520.

[0071] In state (a), opening the tab 30 generates a stress F in the fracture tip region of the latter fracture portion 542 that counteracts the stress F542 required to fracture the latter fracture portion 542. In state (b), lifting the tab 30 generates a small elastic strain near the latter fracture portion 542. However, in state (c), because the oscillation portion 60 is not provided in the latter fracture portion 542, the elastic strain is released by the fracture of the score while it is still small. Thus, in the latter fracture portion 542 of the comparative example, a stress F that is approximately balanced with the stress F542 required to cause the fracture of the latter fracture portion 542 to progress continuously is applied, and the fracture of the score progresses continuously, resulting in a continuous, faint crackling sound.

[0072] 5B is an example of an audio waveform of an opening sound emitted when a can lid of a comparative example is opened. In the comparative example, after the initial opening sound S41 is generated, a breaking sound S542 is generated in a short time due to the breaking of the latter breaking portion 542. After that, the breaking of the latter breaking portion 542 is completed, and the opening 20 is pushed down, generating sound S20. In this example, since strain energy does not accumulate, a breaking sound due to the sudden release of elastic strain is not generated.

[0073] 6A shows a modified example of the can body 200. The oscillation section 60 of this example has a structure with a different cross-sectional shape from that of the latter breaking section 42.

[0074] The oscillation section 60 has two regions, oscillation section 60a and oscillation section 60b. In this example, the oscillation section 60 may be an easily breakable section that is more likely to break than the other latter-stage breakable sections 42. That is, the oscillation section 60 may have a thickness thinner than the latter-stage breakable sections 42. The oscillation section 60 may be provided by extending along the latter-stage breakable sections 42. At least one region of the oscillation section 60 may have a length of 5% to 30% of the length of the latter-stage breakable sections 42, or may have a length of 10% to 20%.

[0075] 6B shows an example of a cross section in the vicinity of the final breaking portion 42. This figure is a cross section of a region of the final breaking portion 42 where the oscillator 60 is not provided. The first thickness D1 of the final breaking portion 42 in this example may be thicker than that in the example of FIG. 3B. The first thickness D1 may be thicker than half the thickness D10 of the panel member 10.

[0076] 6C shows an example of a cross section of a region of the latter breaking portion 42 where the oscillation portion 60 is provided. The oscillation portion 60 in this example functions as an easy-to-break portion that is more likely to break than the latter breaking portion 42. The oscillation portion 60 has a second thickness D2 that is different from the first thickness D1 of the latter breaking portion 42.

[0077] The second thickness D2 may be thinner than the first thickness D1. The second thickness D2 may be 80% or more and 95% or less of the first thickness D1. The second thickness D2 may be 80% or more and 90% or less of the first thickness D1. The second thickness D2 may be 0.04 mm or more and 0.45 mm or less. The second thickness D2 may be 0.09 mm, 0.075 mm, or 0.06 mm.

[0078] The oscillation section 60 may be formed in the same process as the latter breaking section 42, or in a process after the formation of the latter breaking section 42. After the formation of the latter breaking section 42, the oscillation section 60 may be formed to a second thickness D2 thinner than the first thickness D1 by burning the metal material of the score by laser processing. Furthermore, the thickness of the oscillation section 60 may be made thinner than the latter breaking section 42 by partially providing a convex portion on the mold used to form the latter breaking section 42.

[0079] 6D is a diagram for explaining the progression of fracture in the latter fracture portion 42. In this example, a case will be described in which the oscillation portion 60 is an easy-to-fracture portion that is more likely to fracture than the latter fracture portion 42.

[0080] In state (a), the opening operation of the tab 30 generates a stress F in the fracture tip region of the late fracture portion 42 that is equivalent to the stress F42 required to fracture the late fracture portion 42. In state (b), elastic strain accumulates near the late fracture portion 42. In state (c), the stress F42 required to fracture the late fracture portion 42 is greater than the stress F60 required to cause fracture to progress in the oscillation portion 60. Therefore, when fracture of the score progresses up to the oscillation portion 60, the oscillation portion 60 breaks all at once. When the oscillation portion 60, which is a susceptible fracture portion, breaks, a large amount of elastic strain is released, generating a loud fracture sound. In this way, even if the oscillation portion 60 is a susceptible fracture portion that is more susceptible to fracture than the late fracture portion 42, a fracture sound can be generated.

[0081] The thicknesses of the oscillator 60a and the oscillator 60b may be different. By changing the thickness of the oscillator 60, the breaking speed of the oscillator 60 can be adjusted, and therefore the volume of the breaking sound can be adjusted. As described above, as the breaking position of the latter breaking portion 42 moves away from the tab 30, the stress concentration on the score is alleviated and the amount of elastic strain around the breaking position increases. Therefore, by making the third thickness of the oscillator 60b thicker than the second thickness of the oscillator 60a, the breaking speeds of the oscillator 60a and the oscillator 60b can be matched, and the volume of the breaking sound can be made uniform.

[0082] 7A shows a modified example of the can body 200. The oscillation portion 60 in this example has a width different from that of the final breaking portion 42. In this example, differences from the can body 200 in FIG. 1A will be particularly described.

[0083] The oscillation section 60 has three oscillation sections 60a to 60c. The oscillation section 60 has a width greater than the latter breaking section 42, and functions as a hard-to-break section that is less likely to break than the latter breaking section 42. By making the width of the oscillation section 60 narrower than the latter breaking section 42, it may function as an easy-to-break section that is more likely to break than the latter breaking section 42. The oscillation section 60 of this example includes three oscillation sections 60a to 60c along the latter breaking section 42. The oscillation sections 60 may be arranged at any intervals along the latter breaking section 42. The specific structure of the oscillation section 60 will be described later.

[0084] 7B shows an example of a cross section in the vicinity of the latter breaking portion 42. This figure is a cross section of a region of the latter breaking portion 42 where the oscillation portion 60 is not provided. The latter breaking portion 42 in this example has a predetermined first width W1.

[0085] The first width W1 is the width in the Y-axis direction of the latter breaking portion 42 on the upper surface of the panel member 10. The upper surface of the panel member 10 may be the upper surface of the inner panel portion 111 or the upper surface of the outer panel portion 112. When the latter breaking portion 42 has a trapezoidal cross section, the first width W1 corresponds to the upper base of the trapezoid of the latter breaking portion 42. However, the first width W1 may also be the size of the lower base of the trapezoid of the latter breaking portion 42.

[0086] 7C shows an example of a cross section of the region of the latter breaking portion 42 where the oscillation portion 60 is provided. The oscillation portion 60 of this example is provided in the latter breaking portion 42 and has a second width W2 that is different from the first width W1 of the latter breaking portion 42. The second width W2 of this example is greater than the first width W1. That is, the oscillation portion 60 of this example functions as a break-resistant portion that is less likely to break than the latter breaking portion 42. The oscillation portion 60 of this example has a U-shaped cross section, but is not limited to this.

[0087] 8A shows a modified example of the can body 200. The oscillation section 60 of this example has a protruding section 63. In this example, differences from the can body 200 of FIG. 1A will be particularly described.

[0088] The protruding portion 63 protrudes from the front or back surface of the panel member 10. The protruding portion 63 is provided on the panel member 10. The protruding portion 63 may be provided inside the final breaking portion 42, or outside the final breaking portion 42. In this example, the protruding portion 63 is provided between the secondary score 50 and the final breaking portion 42. The protruding portion 63 can be formed relatively easily by performing protruding processing before forming the final breaking portion 42.

[0089] The can lid 100 of this example can change the breakability of the final break portion 42 by providing the protruding portion 63. By providing the protruding portion 63, the strength of the panel member 10 adjacent to the final break portion 42 can be improved. This increases the vibration frequency when the breaking sound is generated, making it easier to generate a higher-pitched sound.

[0090] 8B is a diagram for explaining the progression of fracture of the latter fracture portion 42. In this example, a case will be described in which the oscillation portion 60 has a protruding portion 63. In this example, the protruding portion 63 protrudes from the inner panel portion 111 toward the front surface of the panel member 10.

[0091] In state (a), the opening operation of the tab 30 generates a stress F in the fracture tip region of the final fracture portion 42 that is equivalent to the stress F42 required to fracture the final fracture portion 42. In state (b), the opening operation of the tab 30 applies a larger stress F until the stress F60 required to cause fracture progression in the oscillation portion 60 acts, and elastic strain accumulates near the final fracture portion 42. Furthermore, the region where the protruding portion 63 is provided has a higher strength than the rest of the final fracture portion 42, so fracture does not progress continuously in a small section. In state (c), when a stress F greater than the stress F60 required to cause fracture progression in the oscillation portion 60 is applied, fracture of the oscillation portion 60 progresses. However, since a stress is required to simultaneously fracture the score in accordance with the protrusion of the protruding portion 63, a greater stress is required than in the final fracture portion 42.

[0092] 8C shows a modified example of the protruding portion 63. In this example, the protruding portion 63 is provided on the outer panel portion 112. When the protruding portion 63 is provided on the outer panel portion 112, it acts in the opposite manner to when the protruding portion 63 is provided on the inner panel portion 111. That is, when the protruding portion 63 is provided on the outer panel portion 112, the deflection of the outer panel portion 112 is reduced, which makes it easier for stress to concentrate on the final fracture portion 42, making it easier for the oscillation portion 60 to fracture.

[0093] In this way, the can lid 100 can change the breakability of the oscillation section 60 by changing the position of the protruding section 63. The can lid 100 may have the oscillation section 60 function as a hard-to-break section that is less likely to break than the latter breaking section 42, or as an easy-to-break section that is more likely to break than the latter breaking section 42.

[0094] 9A shows a modified example of the can body 200. The can body 200 of this example has a step portion 64. In this example, differences from the can body 200 of FIG. 1A will be particularly described.

[0095] The step portion 64 is a step provided in the latter breaking portion 42. The step portion 64 may be a convex portion or a concave portion provided in the latter breaking portion 42. At least a part of the oscillation portion 60 may be provided in the panel member 10. The step portion 64 may be provided so as to extend inward from the latter breaking portion 42 or outward from the latter breaking portion 42. The step portion 64 in this example is provided so as to cross the latter breaking portion 42 from inside the latter breaking portion 42 to outside the latter breaking portion 42. The can lid 100 in this example has three step portions 64a to 64c corresponding to the oscillation portions 60a to 60c.

[0096] 9B is a diagram illustrating the progression of fracture in the latter fracture portion 42. In this example, a case will be described in which a step portion 64 is provided in the latter fracture portion 42. In this example, the step portion 64 is provided in the inner panel portion 111 and the outer panel portion 112. In this example, the step portion 64 deforms like a hinge, thereby alleviating the stress generated in the latter fracture portion 42 and making the latter fracture portion 42 less likely to fracture.

[0097] 10A shows a modified example of the can body 200. This figure shows an example of a cross section of the region of the final breaking portion 42 where the oscillation portion 60 is provided. The can lid 100 of this example has a back surface coating layer 80 on the back surface of the panel member 10.

[0098] The back coating layer 80 is provided on the back surfaces of the inner panel portion 111 and the outer panel portion 112. The back coating layer 80 has a fourth predetermined thickness D4. The back coating layer 80 may be any paint or coating resin. For example, the material of the back coating layer 80 is polyethylene terephthalate.

[0099] The oscillation section 60 is provided in the back surface coating layer 80. The oscillation section 60 is provided in the back surface coating layer 80 at a position corresponding to the back surface side of the late fracture section 42, and has a fifth thickness D5 different from the fourth thickness D4. The fifth thickness D5 may be thicker or thinner than the fourth thickness D4. The oscillation section 60 may be formed by applying a thick layer of the back surface coating layer 80. The oscillation section 60 may also be formed thin by making cuts after forming the back surface coating layer 80. In this example, the oscillation section 60 functions as a fracture-resistant section that is less likely to fracture than the late fracture section 42 by forming the back surface coating layer 80 thicker than the late fracture section 42.

[0100] 10B shows a modified example of the can body 200. The can lid 100 of this example has a back surface covering layer 80 on the back surface of the panel member 10. The back surface covering layer 80 of this example is made up of a first material 81 and a second material 82.

[0101] The first material 81 is provided on the back surface of the panel member 10. In this example, the first material 81 is provided on the back surfaces of the inner panel portion 111 and the outer panel portion 112. The first material 81 may be provided so as to cover substantially the entire back surface of the panel member 10.

[0102] The second material 82 is a material having a different strength from the first material 81. The second material 82 may be provided in the back surface coating layer 80 at a position corresponding to the back surface side of the late breaking portion 42. The second material 82 may have a strength greater than or less than that of the first material 81. The second material 82 in this example has a strength greater than that of the first material 81. By increasing the strength of the back surface coating layer 80, the oscillation portion 60 in this example functions as a breaking-resistant portion that is less likely to break than the late breaking portion 42.

[0103] Fig. 11 shows a modified can body 200. The can lid 100 of this example has a branch score 65. In this example, differences from the can body 200 of Fig. 1A will be particularly described.

[0104] The branch score 65 is provided on the panel member 10 and is connected to the final break portion 42. The branch score 65 branches the fracture progression of the final break portion 42 to the branch score 65, thereby dispersing the force from the tab 30 to the final break portion 42 and the branch score 65. When the fracture progression of the branch score 65 reaches the end of the branch score 65, the force from the tab 30 is again concentrated on the fracture progression of the final break portion 42, causing a rapid fracture progression and a breaking sound due to the release of strain. The can lid 100 of this example has three branch scores 65a to 65c corresponding to the oscillation portions 60a to 60c. The oscillation portion 60 of this example functions as a fracture-resistant portion that is more difficult to fracture than the final break portion 42 by releasing stress to the branch score 65. The number of branch scores 65 is not limited to this example. In this example, the branch score 65 branches one score into two, but one score may also branch into three or more.

[0105] Fig. 12 shows a modified example of the can body 200. The can lid 100 of this example has a substantially straight portion 66 and a substantially apex portion 67. In this example, differences from the can body 200 of Fig. 1A will be particularly described.

[0106] The substantially straight portion 66 is provided in the latter breaking portion 42, and is a region that is substantially straight when viewed from the plane of the panel member 10. The substantially straight line does not only mean a perfect straight line, but may also include a curve with a relatively large radius of curvature. The substantially straight portion 66 is a region where the progression of fracture in the latter breaking portion 42 proceeds stably, and may be a region where fracture progresses with relatively light stress. In other words, the substantially straight portion 66 may be an easy-to-break portion. The oscillation portion 60 of this example includes multiple substantially straight portions 66. The lengths of the multiple substantially straight portions 66 may be the same or different.

[0107] The approximate vertex portion 67 is provided in the final breaking portion 42 and is a region that forms an approximate vertex when viewed from above the panel member 10. The approximate vertex portion 67 may be a region sandwiched between the approximate straight portions 66. At the approximate vertex portion 67, the stress directional component required for breaking the final breaking portion 42 changes suddenly, thereby impeding the progression of breakage of the score. In other words, the approximate vertex portion 67 may be a portion that is difficult to break. The approximate vertex portion 67 may include a narrow curve, i.e., a curve with a small radius of curvature. The oscillation portion 60 of this example includes five approximate straight portions 66a to 66e and four approximate vertices 67a to 67d. However, the number of approximate straight portions 66 and approximate vertices 67 is not limited to this.

[0108] Figure 13 shows a modified example of the can body 200. The can lid 100 of this example has a first oscillating region 68 and a second oscillating region 69 with different intervals between the oscillating portions 60. In this example, differences from the can body 200 of Figure 1A will be particularly described.

[0109] The first oscillation region 68 emits breaking sounds at predetermined intervals along the latter breaking portion 42. In this example, the first oscillation region 68 has five oscillation portions 60a to 60e. The oscillation portions 60 of the first oscillation region 68 may be arranged at equal intervals or at different intervals.

[0110] The second oscillating region 69 emits breaking sounds at intervals different from those of the first oscillating region 68 along the latter rupture portion 42. The second oscillating region 69 is provided after the first oscillating region 68 in the rupture direction of the latter rupture portion 42. The second oscillating region 69 may be provided so that the intervals between the oscillating portions 60 are greater than those in the first oscillating region 68. In this example, the second oscillating region 69 has three oscillating portions 60f to 60h. The oscillating portions 60 in the second oscillating region 69 may be arranged at the same intervals or at different intervals. In the first oscillating region 68 and the second oscillating region 69, the intervals between the oscillating portions 60 may be gradually changed.

[0111] The can lid 100 of this example can adjust the sound pressure, pitch, and tone of the opening sound by arranging the oscillators 60 in a sparsely packed manner. For example, the can lid 100 can produce a humming opening sound by arranging the oscillators 60 in a sparsely packed manner. The can lid 100 can change the tone, such as gradually lowering the sound, by adjusting the spacing between the oscillators 60. The oscillators 60 of this example have a width greater than the final breaking portion 42, but the type of oscillators 60 is not limited to this.

[0112] 14A shows a modified example of a can body 200. The can body 200 of this example is an example of a metal can for food. The can body 200 includes a container body 210 and a can lid 100.

[0113] The can lid 100 includes a panel member 10, an opening 20, a tab 30, a rivet 35, a main score 40, and a secondary score 50. When the tab 30 is opened, the main score 40 formed around the entire periphery of the panel member 10 breaks, and the panel member 10 is separated from the can lid 100. In other words, the entire panel member 10 functions as the opening 20. The can lid 100 may include an auxiliary breaking portion 43.

[0114] The auxiliary breaking portion 43 is a score that breaks before the main score 40 breaks. That is, the auxiliary breaking portion 43 breaks before the initial breaking portion 41 breaks by lifting the tab 30. By providing the auxiliary breaking portion 43, the force required to lift the tab 30 can be reduced. This makes it easier to break the initial breaking portion 41.

[0115] The final breaking portion 42 has a first path 142 and a second path 242. The first path 142 and the second path 242 are each broken during the opening operation of the tab 30. After the initial breaking portion 41 breaks, the first path 142 breaks counterclockwise as viewed from the top surface of the can lid 100. After the initial breaking portion 41 breaks, the second path 242 breaks clockwise as viewed from the top surface of the can lid 100.

[0116] The oscillator 60 may emit breaking sounds for the first path 142 and the second path 242, respectively. In this example, the oscillator 60 may be provided symmetrically in the first path 142 and the second path 242. "Provided symmetrically" may mean that the oscillator 60 is arranged so that the first path 142 and the second path 242 break at approximately the same time as the breakage progresses. This allows the can lid 100 to generate a chord sound. However, the oscillator 60 may be provided asymmetrically in the first path 142 and the second path 242.

[0117] The can lid 100 includes four oscillators 60a to 60d in the first path 142. The can lid 100 includes four oscillators 60a' to 60d' in the second path 242. The four oscillators 60a to 60d may be provided symmetrically to the four oscillators 60a' to 60d'. The four oscillators 60a to 60d may have the same structure as the four oscillators 60a' to 60d', or may have a different structure.

[0118] The protrusions 18 are intended to make contact with the bottoms of other can bodies 200, thereby stably stacking the can bodies 200. The can lid 100 of this example has four protrusions 18, but is not limited to this.

[0119] 14B shows an example of a perspective view of the can body 200. The can lid 100 may include a curled portion 70 and a panel wall portion 72. The curled portion 70 may be joined to the flange portion of the container body portion 210 by a double seaming process.

[0120] 15 is a diagram for explaining the state before and after the rupture of the initial rupture portion 41 and the auxiliary rupture portion 43. This diagram is an enlarged cross-sectional view of the periphery of the tab 30 and the rivet 35.

[0121] In state (a), the tab 30 is positioned in its initial position. In state (b), when the tab 30 is raised to lift the rivet 35, the panel member 10 is pushed downward by the principle of leverage, causing the auxiliary breaking portion 43 to break. In state (c), when the auxiliary breaking portion 43 breaks, the tab 30 becomes easier to lift, and further pushing the panel member 10 downward causes the initial breaking portion 41 to break. After the initial breaking portion 41 has broken, but before the opening operation of the opening 20 is performed, the final breaking portion 42 does not need to be broken.

[0122] Figure 16 shows a modified example of can body 200. Can body 200 of this example differs from can body 200 of Figure 14A in that it has an asymmetrically arranged oscillation section 60. In this example, the differences from can body 200 of Figure 14A will be particularly described.

[0123] The can lid 100 has twelve oscillators 60a to 60l in the first path 142. The can lid 100 has six oscillators 60a' to 60f' in the second path 242. The twelve oscillators 60a to 60l may be arranged asymmetrically with respect to the six oscillators 60a' to 60f', or some may be arranged symmetrically. The oscillators 60 in the first path 142 and the second path 242 may have the same structure or may be different. The can body 200 of this example can produce any opening sound by varying the tone, for example by including chords.

[0124] FIG. 17 shows an example of a can body 200. The can body 200 includes a can lid 100 and a container body 210. The can lid 100 may be attached to the container body 210. The can body 200 may be in a state before the can lid 100 is attached to the container body 210. The can body 200 may be a two-piece can or a three-piece can. The can body 200 may be an aluminum can or a steel can.

[0125] When the can body 200 is composed of multiple components, the components do not need to be joined together. For example, when the can body 200 is composed of three components, a bottom lid, a can body, and a top cover, the bottom lid does not need to be attached to the can body. The bottom lid may be joined to the can body after the contents are filled. Any image may be printed on the container main body 210.

[0126] 18 shows an example of the configuration of a filled can 300. In the filled can 300, a can body 200 is filled with a predetermined content 310. The content 310 may be a beverage, a food product, or any other item.

[0127] Although the present invention has been described above using embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It will be apparent to those skilled in the art that various modifications and improvements can be made to the above embodiments. It is clear from the claims that such modifications and improvements can also be included within the technical scope of the present invention.

[0128] It should be noted that the execution order of each process, such as operations, procedures, steps, and stages, in the devices, systems, programs, and methods shown in the claims, specifications, and drawings is not specifically stated as "before," "prior to," etc., and that the processes can be performed in any order unless the output of a previous process is used in a subsequent process. Even if the operational flow in the claims, specifications, and drawings is described using "first," "next," etc. for convenience, this does not mean that the processes must be performed in this order. [Explanation of symbols]

[0129] 10 Panel member, 12 Inner panel portion, 14 Outer panel portion, 16 Recess, 18 Convex portion, 20 Opening, 30 Tab, 35 Rivet, 40 Main score, 41 Initial break portion, 42 Late break portion, 43 Auxiliary break portion, 50 Sub-score, 60 Oscillation portion, 61 Oscillation processed portion, 62 Side wall portion, 63 Projection portion, 64 Step portion, 65 Branch score, 66 Straight portion, 67 Vertex portion, 68 1st 1 oscillation region, 69... second oscillation region, 70... curled portion, 72... panel wall portion, 74... annular groove, 80... back surface coating layer, 81... first material, 82... second material, 100... can lid, 111... inner panel portion, 112... outer panel portion, 142... first path, 200... can body, 210... container main body portion, 242... second path, 300... filled can, 310... contents, 510... panel member, 520... opening, 542... later break portion

Claims

1. A panel member; an opening provided in the panel member; a tab provided on the panel member for opening the opening; a main score having an initial breaking portion that is broken by pulling the tab from its initial position and a later breaking portion that is broken during an opening operation after breaking the initial breaking portion; an oscillator that oscillates so as to intermittently generate a breaking sound of the latter breaking portion; Equipped with the latter breaking portion has a predetermined first thickness, The oscillation portion is provided in the latter breaking portion and has a second thickness different from the first thickness.

2. The second thickness is greater than the first thickness and is 105% or more and 130% or less of the first thickness. The can lid according to claim 1.

3. The second thickness is thinner than the first thickness and is 80% or more and 95% or less of the first thickness. The can lid according to claim 1.

4. The oscillation portion is provided in the latter breaking portion and has a second thickness different from the first thickness and a third thickness different from the first thickness and the second thickness. A can lid according to any one of claims 1 to 3.

5. A panel member; an opening provided in the panel member; a tab provided on the panel member for opening the opening; a main score having an initial breaking portion that is broken by pulling the tab from its initial position and a later breaking portion that is broken during an opening operation after breaking the initial breaking portion; an oscillator that oscillates so as to intermittently generate a breaking sound of the latter breaking portion; Equipped with the latter breaking portion has a predetermined first width, The oscillation portion is provided in the latter breaking portion and has a second width different from the first width. Can lid.

6. A panel member; an opening provided in the panel member; a tab provided on the panel member for opening the opening; a main score having an initial breaking portion that is broken by pulling the tab from its initial position and a later breaking portion that is broken during an opening operation after breaking the initial breaking portion; an oscillator that oscillates so as to intermittently generate a breaking sound of the latter breaking portion; Equipped with The oscillation section is provided on the panel member and has a protruding section that protrudes from the front surface or the back surface of the panel member. Can lid.

7. A panel member; an opening provided in the panel member; a tab provided on the panel member for opening the opening; a main score having an initial breaking portion that is broken by pulling the tab from its initial position and a later breaking portion that is broken during an opening operation after breaking the initial breaking portion; an oscillator that oscillates so as to intermittently generate a breaking sound of the latter breaking portion; Equipped with The oscillation section has a step section that is a step provided in the latter breaking section. Can lid.

8. At least a part of the oscillation section is provided on the panel member. A can lid according to any one of claims 1 to 7.

9. A panel member; an opening provided in the panel member; a tab provided on the panel member for opening the opening; a main score having an initial breaking portion that is broken by pulling the tab from its initial position and a later breaking portion that is broken during an opening operation after breaking the initial breaking portion; an oscillator that oscillates so as to intermittently generate a breaking sound of the latter breaking portion; Equipped with a back surface covering layer provided on a back surface of the panel member and having a fourth predetermined thickness; The oscillation portion is provided in the back surface covering layer at a position corresponding to the rear surface side of the final breaking portion, and has a fifth thickness different from the fourth thickness. Can lid.

10. A panel member; an opening provided in the panel member; a tab provided on the panel member for opening the opening; a main score having an initial breaking portion that is broken by pulling the tab from its initial position and a later breaking portion that is broken during an opening operation after breaking the initial breaking portion; an oscillator that oscillates so as to intermittently generate a breaking sound of the latter breaking portion; Equipped with a back surface covering layer provided on a back surface of the panel member and having a predetermined first material; The oscillation section is provided in the rear surface covering layer at a position corresponding to the rear surface side of the final fracture section, and has a second material having a strength different from that of the first material. Can lid.

11. A panel member; an opening provided in the panel member; a tab provided on the panel member for opening the opening; a main score having an initial breaking portion that is broken by pulling the tab from its initial position and a later breaking portion that is broken during an opening operation after breaking the initial breaking portion; an oscillator that oscillates so as to intermittently generate a breaking sound of the latter breaking portion; Equipped with The oscillation portion is provided on the panel member and has a branch score connected to the final breaking portion. Can lid.

12. A panel member; an opening provided in the panel member; a tab provided on the panel member for opening the opening; a main score having an initial breaking portion that is broken by pulling the tab from its initial position and a later breaking portion that is broken during an opening operation after breaking the initial breaking portion; an oscillator that oscillates so as to intermittently generate a breaking sound of the latter breaking portion; Equipped with The oscillation portion is provided in the latter breaking portion, and has a substantially straight portion and a substantially vertex portion when viewed from above the plane of the panel member. Can lid.

13. The oscillation unit is a first oscillation region that generates the breaking sound at predetermined intervals along the latter breaking portion; a second oscillation region that generates the breaking sound at intervals different from those of the first oscillation region along the latter breaking portion; 13. A can lid according to any one of claims 1 to 12, comprising:

14. A panel member; an opening provided in the panel member; a tab provided on the panel member for opening the opening; a main score having an initial breaking portion that is broken by pulling the tab from its initial position and a later breaking portion that is broken during an opening operation after breaking the initial breaking portion; an oscillator that oscillates so as to intermittently generate a breaking sound of the latter breaking portion; Equipped with the latter breaking portion has a first path and a second path that are respectively broken during the opening operation of the tab; the oscillator generates breaking sounds for the first path and the second path, The oscillation portion of the first path is disposed asymmetrically with respect to the oscillation portion of the second path. Can lid.

15. A panel member; an opening provided in the panel member; a tab provided on the panel member for opening the opening; a main score having an initial breaking portion that is broken by pulling the tab from its initial position and a later breaking portion that is broken during an opening operation after breaking the initial breaking portion; an oscillator that oscillates so as to intermittently generate a breaking sound of the latter breaking portion; Equipped with An opening sound is generated that is composed of a breaking sound of the initial breaking portion and a breaking sound of the later breaking portion. Can lid.

16. A panel member; an opening provided in the panel member; a tab provided on the panel member for opening the opening; a main score having an initial breaking portion that is broken by pulling the tab from its initial position and a later breaking portion that is broken during an opening operation after breaking the initial breaking portion; an oscillator that oscillates so as to intermittently generate a breaking sound of the latter breaking portion; Equipped with The oscillation section has a hard-to-break section that is harder to break than the later-break section. Can lid.

17. A panel member; an opening provided in the panel member; a tab provided on the panel member for opening the opening; a main score having an initial breaking portion that is broken by pulling the tab from its initial position and a later breaking portion that is broken during an opening operation after breaking the initial breaking portion; an oscillator that oscillates so as to intermittently generate a breaking sound of the latter breaking portion; Equipped with The oscillation portions are arranged so that the intervals between them gradually decrease along the latter breaking portion. Can lid.

18. A can lid according to any one of claims 1 to 17; a container body to which the can lid is attached; A can body comprising:

19. A filled can comprising the can body according to claim 18 filled with a predetermined content.

Images