Mashing device

Abstract

The utility model discloses a masher, which belongs to the technical field of masher and comprises a handle with a first end in the axial direction. The first mashing sheet is fixedly arranged at the first end; the second mashing piece is rotatably connected with the first end and / or the first mashing piece, and the second mashing piece can selectively rotate to form an included angle with the first mashing piece. According to the masher designed by the utility model, a user can control the angle between the first mashing sheet and the second mashing sheet according to actual requirements, so that food materials can be stir-fried or mashed by using the masher, the cooking efficiency of the user on the food materials is improved, and meanwhile, the user can conveniently use the masher. A user can control the first mashing piece and the second mashing piece to coincide so as to reduce the size of the masher, and therefore the masher can be conveniently contained and stored.

Description

Technical Field

[0001] The utility model belongs to the technical field of mashers, and in particular relates to a masher. Background Art

[0002] In the related art, a masher is used to mash ingredients when cooking. In the prior art, a traditional masher includes a handle and a mashing head fixedly arranged at the end of the handle. In the prior art, the contact surface between the mashing head and the ingredients is larger, but this also leads to a large size of the mashing head, which makes the masher inconvenient to store. At the same time, the masher has a single function and is only suitable for mashing ingredients, resulting in a poor user experience. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a masher. According to the masher designed by the utility model, the user can control the angle between the first masher pieces and the second masher pieces according to actual needs, so as to use the masher to stir-fry or mash the ingredients, thereby improving the cooking efficiency of the ingredients. At the same time, the user can control the overlap of the first masher pieces and the second masher pieces to reduce the volume of the masher, thereby facilitating the storage and storage of the masher.

[0004] In order to achieve the above object, the utility model provides the following technical solutions:

[0005] The utility model provides a masher, comprising: a handle, wherein the handle has a first end in the axial direction; a first masher, wherein the first masher is fixedly arranged at the first end; and a second masher, wherein the second masher is rotatably connected to the first end and / or the first masher, and the second masher can be selectively rotated to form an angle with the first masher.

[0006] According to the masher of the utility model, its second mashering piece is rotatably connected to the first end and / or the first mashering piece, and the second mashering piece can be selectively rotated to form an angle with the first mashering piece. The user can control the angle between the first mashering piece and the second mashering piece according to actual needs, so as to use the masher to stir-fry or mash the ingredients, thereby improving the user's cooking efficiency of the ingredients. At the same time, it can avoid the user from using a traditional spatula and a traditional masher at the same time when cooking, reducing the number of cooking utensils used by the user when cooking, thereby reducing the number of cooking tools that the user needs to clean, improving the user's usage experience, and at the same time, the user can reduce the volume of the masher by controlling the first mashering piece to overlap with the second mashering piece, thereby facilitating the storage and storage of the masher.

[0007] Furthermore, the handle includes: a first handle, in which a mounting channel is provided; a second handle, in which at least a portion of the second handle is rotatably disposed in the mounting channel, and an end of the second handle close to the first pounding piece is connected to the second pounding piece.

[0008] Furthermore, the first pounding piece includes: a first sheet and a second sheet, the first sheet and the second sheet having ends on the same side connected to the first handle respectively, an installation gap is formed between the first sheet and the second sheet, and at least a portion of the second pounding piece is arranged in the installation gap.

[0009] Furthermore, the second pounding piece includes: a connecting plate, which is connected to the second handle; a third sheet and a fourth sheet, which are respectively arranged on both sides of the connecting plate in the radial direction; wherein at least a part of the connecting plate is rotatably arranged in the installation gap.

[0010] Furthermore, a first receiving groove and a second receiving groove are formed on the first sheet and the second sheet respectively, and the first receiving groove and the second receiving groove are suitable for receiving the third sheet and the fourth sheet respectively.

[0011] Furthermore, the inner wall of the installation channel is provided with a slide groove, and the slide groove extends in the circumferential direction. The outer peripheral wall of the second handle is provided with a protrusion, and the protrusion is movably arranged in the slide groove.

[0012] Furthermore, a limiting groove is further provided on the inner wall of the installation channel, and the limiting groove and the sliding groove are spaced apart from each other in the circumferential direction, and the protrusion can be selectively received in the limiting groove to fix the first handle and the second handle.

[0013] Furthermore, the second handle includes: a first rod, which is rotatably received in the installation channel, and one end of the first rod is connected to the second pounding piece; a second rod, which is arranged outside the installation channel, and one end of the second rod is detachably connected to the other end of the first rod.

[0014] Furthermore, a plurality of first weight-reducing holes and a plurality of second weight-reducing holes are respectively formed on the first pounding pieces and the second pounding pieces.

[0015] Other advantages, objectives and features of the utility model will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art can be taught from the practice of the utility model. The objectives and other advantages of the utility model can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the purpose, technical solution and beneficial effects of the utility model clearer, the utility model is described with the following drawings:

[0017] Figure 1 It is a structural schematic diagram of the masher of the utility model;

[0018] Figure 2 This is a schematic structural diagram of the utility model in which the angle between the first pounding pieces and the second pounding pieces of the pounding device is 90°;

[0019] Figure 3 This is a schematic diagram of the connection between the first pounding piece and the first handle of the utility model;

[0020] Figure 4 for Figure 3 The middle circle shows an enlarged view of A;

[0021] Figure 5 This is a schematic diagram of the connection between the second pounding piece and the second handle of the utility model;

[0022] Figure 6 It is a bottom view of the masher of the utility model.

[0023] The following are marked in the accompanying drawings:

[0024] 1. Masher;

[0025] 10. handle; 11. first handle; 111. mounting channel; 112. slide groove; 113. limit groove; 12. second handle; 121. bump; 122. first rod; 123. second rod;

[0026] 20. First pounding piece; 21. First sheet body; 22. Second sheet body; 23. Installation gap; 24. First weight-reducing hole;

[0027] 30. Second pounding piece; 31. Connecting plate; 32. Third piece; 33. Fourth piece; 34. Second weight-reducing hole. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0029] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to those skilled in the art that these specific details are not necessary to implement the present invention. In other examples, in order to avoid obscuring the present invention, well-known structures, circuits, materials or methods are not specifically described.

[0030] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment," "an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. In addition, it will be appreciated by those of ordinary skill in the art that the figures provided herein are for illustrative purposes and that the figures are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] In the description of the present invention, it should be understood that the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the scope of protection of the present invention.

[0032] Embodiment 1:

[0033] like Figure 1-Figure 6 As shown, the utility model provides a masher 1, comprising: a handle 10, a first masher 20 and a second masher 30, the handle 10 has a first end in the axial direction, the first masher 20 is fixedly arranged at the first end, the second masher 30 is rotatably connected to the first end and / or the first masher 20, and the second masher 30 can be selectively rotated to form an angle with the first masher 20.

[0034] In some embodiments, the handle 10 extends in the axial direction, and has a first end and a second end in the axial direction. The first end is provided with a first pounding piece 20, and the first pounding piece 20 is fixedly connected to the first end, and the second pounding piece 30 is rotatably connected to the first end and / or the first pounding piece 20. The first pounding piece 20 can be selectively rotated to form an angle between itself and the second pounding piece 30. It is worth noting that the first pounding piece 20 extends in the axial direction and radial direction, and the second pounding piece 30 extends in the axial direction and radial direction.

[0035] Of course, the second pounding piece 30 may be rotatably connected to the handle 10; the second pounding piece 30 may be rotatably connected to the first pounding piece 20; or the second pounding piece 30 may be rotatably connected to the handle 10 and the first pounding piece 20, which is not limited here.

[0036] It is understandable that the user can control the angle between the first pounding piece 20 and the second pounding piece 30 according to different ingredients. For example, the angle between the first pounding piece 20 and the second pounding piece 30 is controlled to be 0°, 10°, 30°, 60°, 80° or 90°, etc., and the rotation angle of the second pounding piece 30 can be controlled according to different ingredients, and there is no limitation here.

[0037] It is worth mentioning that when the angle between the first pounding pieces 20 and the second pounding pieces 30 is greater than 0°, the first pounding pieces 20 and the second pounding pieces 30 are jointly constructed as a pounding head with an "X"-shaped or "T"-shaped cross-section. At this time, the user can use the pounding head to crush the food. Compared with the pounding head with an "I"-shaped cross-section, the pounding pieces of the present application have a larger contact area with the food, thereby achieving a higher crushing efficiency for the food.

[0038] Of course, when the angle between the first pounding pieces 20 and the second pounding pieces 30 of the present application is 0°, that is, when the first pounding pieces 20 and the second pounding pieces 30 overlap, the pounder 1 of the present application can be used to stir-fry ingredients when cooking, that is, the pounder 1 of the present application integrates the functions of pounding and cooking, and the pounder 1 has more functions, which is convenient for users to use and improves the user experience. At the same time, when the angle between the first pounding pieces 20 and the second pounding pieces 30 is 0°, the volume occupied by the pounder 1 is smaller, making it more convenient to store and store the pounder 1.

[0039] For example: when the masher 1 of the present application is used for cooking mashed potatoes, the first masher pieces 20 can be controlled to overlap with the second masher pieces 30. At this time, the user can use the masher 1 to stir-fry potato slices or potato cubes. After the potato slices or potato cubes are fried, the user can control the angle between the first masher pieces 20 and the second masher pieces 30 to be 30°, 60° or 90°, etc. At this time, the user can use the masher 1 to mash the potato slices or potato cubes, which is convenient for the user to make mashed potatoes, and can avoid the user using two cooking tools "a spatula and an ordinary masher 1", reducing the number of cooking tools that the user needs to clean, and further improving the user's experience.

[0040] According to the masher 1 of the present invention, the second masher 30 is rotatably connected to the first end and / or the first masher 20, and the second masher 30 can be selectively rotated to form an angle with the first masher 20. The user can control the angle between the first masher 20 and the second masher 30 according to actual needs, so as to use the masher 1 to stir-fry or mash the ingredients, thereby improving the user's cooking efficiency of the ingredients. At the same time, the user can avoid using a traditional spatula and a traditional masher 1 at the same time when cooking, reducing the number of cooking utensils used by the user when cooking, thereby reducing the number of cooking tools that the user needs to clean, and improving the user's experience. At the same time, the user can control the first masher 20 and the second masher 30 to overlap to reduce the volume of the masher 1, thereby facilitating the storage and storage of the masher 1.

[0041] Embodiment 2:

[0042] In this embodiment, on the basis of the first embodiment, the handle 10 comprises: a first handle 11 and a second handle 12. The first handle 11 is provided with a mounting channel 111. At least a portion of the second handle 12 is rotatably disposed in the mounting channel 111. An end of the second handle 12 close to the first pounding piece 20 is connected to the second pounding piece 30.

[0043] In some embodiments, a mounting channel 111 is formed in the first handle 11, and part of the second handle 12 is rotatably arranged to be accommodated in the mounting channel 111. A first pounding piece 20 is fixedly arranged on the first handle 11, and a second pounding piece 30 is arranged at the end of the part of the second handle 12 accommodated in the mounting channel 111. The first handle 11 can be rotated relative to the second handle 12 to control the first pounding piece 20 to rotate relative to the second pounding piece 30, thereby achieving control of the angle between the first pounding piece 20 and the second pounding piece 30. Therefore, the above arrangement can make the second pounding piece 30 more convenient to rotate relative to the first pounding piece 20, thereby improving the user's convenience in using the masher 1 and further improving the user's experience.

[0044] Embodiment three:

[0045] In this embodiment, based on the second embodiment, the first pounding piece 20 includes: a first sheet 21 and a second sheet 22, the same side ends of the first sheet 21 and the second sheet 22 are respectively connected to the first handle 11, an installation gap 23 is formed between the first sheet 21 and the second sheet 22, and at least a portion of the second pounding piece 30 is arranged in the installation gap 23.

[0046] In some embodiments, the first sheet 21 and the second sheet 22 are respectively connected to the first handle 11, and the first sheet 21 and the second sheet 22 are spaced apart from each other, a portion of the second pounding piece 30 is disposed in the installation gap 23, and the portion of the second pounding piece 30 disposed in the installation gap 23 is suitable for connecting to the second handle 12.

[0047] Therefore, through the above arrangement, when the first handle 11 rotates relative to the second handle 12 to control the second pounding piece 30 to rotate relative to the first pounding piece 20, the first pounding piece 20 and the second pounding piece 30 can be prevented from interfering with each other, so that the rotation of the second pounding piece 30 and the first pounding piece 20 is smoother, thereby improving the convenience of use of the pounder 1.

[0048] According to some embodiments of the utility model, the second pounding piece 30 includes: a connecting plate 31, a third sheet 32 ​​and a fourth sheet 33, the connecting plate 31 is connected to the second handle 12, the third sheet 32 ​​and the fourth sheet 33 are respectively arranged on both sides of the connecting plate 31 in the radial direction; wherein at least a portion of the connecting plate 31 is rotatably arranged in the installation gap 23.

[0049] In some embodiments, at least a portion of the connecting plate 31 is rotatably disposed in the installation gap 23, and in the axial direction, the portion of the connecting plate 31 that overlaps with the second handle 12 is suitable for connecting to the second handle 12, and the connecting plate 31 is provided with a third sheet 32 ​​and a fourth sheet 33 on both sides in the radial direction, respectively. The second handle 12 rotates to control the rotation of the connecting plate 31, thereby rotating the third sheet 32 ​​and the fourth sheet 33, thereby causing the first pounding pieces 20 and the second pounding pieces 30 to form an "X"-shaped structure, thereby increasing the contact area between the pounder 1 and the food, and further improving the pounding efficiency of the food.

[0050] According to some embodiments of the present invention, a first receiving groove and a second receiving groove are formed on the first sheet 21 and the second sheet 22 respectively, and the first receiving groove and the second receiving groove are suitable for receiving the third sheet 32 ​​and the fourth sheet 33 respectively.

[0051] In some embodiments, a first receiving groove and a second receiving groove are respectively provided on the side of the first sheet 21 and the second sheet 22 facing away from each other. The shape of the first receiving groove is adapted to the first sheet 21, and the shape of the second receiving groove is adapted to the second sheet 22. Therefore, when the second handle 12 is rotated relative to the first handle 11, the third sheet 32 ​​and the fourth sheet 33 can be respectively received in the first receiving groove and the second receiving groove. At this time, the shape of the masher 1 is almost the same as that of a traditional spatula, which beautifies the appearance of the masher 1, and the volume of the masher 1 is smaller at this time, which facilitates the storage and storage of the masher 1.

[0052] It is worth noting that the radial extension direction of the first sheet 21 is the first direction, the first sheet 21 and the second sheet 22 are arranged at intervals in the first direction, and the projections of the first sheet 21 and the second sheet 22 in the first direction are arranged alternately. After the third sheet 32 ​​and the fourth sheet 33 are respectively accommodated in the first receiving groove and the second receiving groove, the radial extension direction of the third sheet 32 ​​is parallel to the radial extension direction of the first sheet 21, the radial extension direction of the fourth sheet 33 is parallel to the radial extension direction of the second sheet 22, one end of the connecting plate 31 in the radial direction is connected to the third sheet 32, and the other end of the connecting plate 31 in the radial direction is inclined to extend toward the fourth sheet 33 and connected to the fourth sheet 33.

[0053] Therefore, the above arrangement can further prevent the first pounding pieces 20 and the second pounding pieces 30 from interfering with each other when the second pounding pieces 30 rotate relative to the first pounding pieces 20 , thereby further improving the convenience of use of the pounder 1 .

[0054] Embodiment 4:

[0055] In this embodiment, based on the second embodiment, the inner wall of the installation channel 111 is provided with a slide groove 112 , which extends in the circumferential direction, and the outer wall of the second handle 12 is provided with a protrusion 121 , which is movably arranged in the slide groove 112 .

[0056] It can be understood that the inner wall of the mounting channel 111 is provided with a slide groove 112, and the protrusion 121 on the outer peripheral wall of the second handle 12 can be movably accommodated in the slide groove 112. The inner peripheral wall of the slide groove 112 can limit the outer peripheral wall of the protrusion 121, so that the second handle 12 can be stably rotated relative to the first handle 11, and at the same time, the second handle 12 can be prevented from moving axially relative to the first handle 11, thereby improving the operational stability of the masher 1.

[0057] According to some embodiments of the utility model, the inner wall of the installation channel 111 is further provided with a limiting groove 113, and the limiting groove 113 and the sliding groove 112 are arranged to be spaced apart from each other in the circumferential direction. The protrusion 121 can be selectively received in the limiting groove 113 to fix the first handle 11 and the second handle 12.

[0058] In some embodiments, a first slide groove, a second slide groove, a third slide groove and a fourth slide groove are arranged in the installation channel 111. The first slide groove, the second slide groove, the third slide groove and the fourth slide groove are spaced apart from each other in the circumferential direction, and the first slide groove and the third slide groove are radially opposite to each other, and the second slide groove and the fourth slide groove are radially opposite to each other.

[0059] A first limiting groove is arranged between the first slide groove and the second slide groove, a second limiting groove is arranged between the second slide groove and the third slide groove, a third limiting groove is arranged between the third slide groove and the fourth slide groove, and a fourth limiting groove is arranged between the fourth slide groove and the first slide groove. The first limiting groove and the third limiting groove are opposite to each other in radial direction, and the second limiting groove and the fourth limiting groove are opposite to each other in radial direction.

[0060] The outer peripheral wall of the second handle 12 is provided with a first protrusion and a second protrusion which are opposite to each other in the radial direction. When the first protrusion and the second protrusion are respectively received in the first limiting groove and the third limiting groove, the second pounding piece 30 can be fixed in the first position. At this time, the first pounding piece 20 and the second pounding piece 30 overlap with each other, and the first pounding piece 20 and the second pounding piece 30 are jointly constructed as a pounding head with an "I"-shaped cross-section. At this time, the user can use the pounder 1 to stir-fry the food; when the first protrusion and the second protrusion are respectively received in the second limiting groove and the third limiting groove, the second pounding piece 30 can be fixed in the second position. At this time, the angle between the first pounding piece 20 and the second pounding piece 30 is 90°, and the first pounding piece 20 and the second pounding piece 30 are jointly constructed as a pounding head with an "X"-shaped cross-section. At this time, the user can use the pounder 1 to pound the food.

[0061] It is worth noting that the limiting groove 113 can be used to fix the position of the first handle 11 relative to the second handle 12, so that the relative position of the first pounding piece 20 and the second pounding piece 30 is fixed, preventing the second pounding piece 30 from rotating relative to the first pounding piece 20 when the user uses the pounder 1, thereby improving the stability of the pounder 1.

[0062] Embodiment five:

[0063] In this embodiment, based on the second embodiment, the second handle 12 includes: a first rod 122 and a second rod 123. The first rod 122 is rotatably received in the installation channel 111, one end of the first rod 122 is connected to the second pounding piece 30, and the second rod 123 is arranged outside the installation channel 111, and one end of the second rod 123 is detachably connected to the other end of the first rod 122.

[0064] In some embodiments, one end of the first rod 122 is connected to the second pounding piece 30. When assembling the masher 1, the end of the first rod 122 facing away from the second pounding piece 30 is inserted into the installation channel 111, and then the first rod 122 is connected to the second rod 123. This can facilitate the assembly of the masher 1 and improve the production efficiency of the masher 1.

[0065] It is understandable that the connection methods between the first rod 122 and the second rod 123 include but are not limited to clamping, bonding, threaded connection, or fixing by fasteners.

[0066] Embodiment five:

[0067] In this embodiment, on the basis of the first embodiment, a plurality of first weight-reducing holes 24 and second weight-reducing holes 34 are respectively formed on the first pounding piece 20 and the second pounding piece 30. It can be understood that the provision of the first weight-reducing holes 24 and the second weight-reducing holes 34 not only reduces the weight of the pounder 1 but also reduces the production cost of the pounder 1. At the same time, when the pounder 1 is used as a spatula, the first weight-reducing holes 24 and the second weight-reducing holes 34 can be used to drain excess water, so that it has the function of a leaking spatula.

[0068] In some embodiments, the radial length dimension of a portion of the first pounding pieces 20 gradually increases in the direction away from the handle 10, and the radial length dimension of a portion of the second pounding pieces 30 gradually increases in the direction away from the handle 10. Therefore, the above-mentioned arrangement can further reduce the gravity of the pounder 1 and reduce the production cost of the pounder 1.

[0069] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the utility model.

Claims

1. A masher, characterized in that: include: A handle (10), wherein the handle (10) has a first end in an axial direction; A first pounding piece (20), wherein the first pounding piece (20) is fixedly disposed at the first end; A second pounding piece (30), wherein the second pounding piece (30) is rotatably connected to the first end and / or the first pounding piece (20), and the second pounding piece (30) can be selectively rotated to form an angle with the first pounding piece (20).

2. The masher according to claim 1, characterized in that The handle (10) comprises: A first handle (11), wherein a mounting channel (111) is provided in the first handle (11); A second handle (12), at least a portion of which is rotatably disposed in the mounting channel (111), and an end of the second handle (12) close to the first pounding piece (20) is connected to the second pounding piece (30).

3. The masher according to claim 2, characterized in that The first pounding pieces (20) include: A first sheet (21) and a second sheet (22), wherein the first sheet (21) and the second sheet (22) are connected to the first handle (11) at the same end thereof, respectively, and an installation gap (23) is formed between the first sheet (21) and the second sheet (22), and at least a portion of the second pounding piece (30) is disposed in the installation gap (23).

4. The masher according to claim 3, characterized in that The second pounding pieces (30) include: A connecting plate (31), wherein the connecting plate (31) is connected to the second handle (12); A third sheet (32) and a fourth sheet (33), wherein the third sheet (32) and the fourth sheet (33) are respectively arranged on both sides of the connecting plate (31) in the radial direction; At least a portion of the connecting plate (31) is rotatably disposed in the installation gap (23).

5. The masher according to claim 4, characterized in that A first receiving groove and a second receiving groove are formed on the first sheet (21) and the second sheet (22), respectively. The first receiving groove and the second receiving groove are suitable for receiving the third sheet (32) and the fourth sheet (33), respectively.

6. The masher according to claim 2, characterized in that The inner wall of the installation channel (111) is provided with a slide groove (112), and the slide groove (112) extends in the circumferential direction. The outer wall of the second handle (12) is provided with a protrusion (121), and the protrusion (121) is movably arranged in the slide groove (112).

7. The masher according to claim 6, characterized in that The inner wall of the installation channel (111) is also provided with a limiting groove (113), the limiting groove (113) and the sliding groove (112) are arranged at intervals from each other in the circumferential direction, and the protrusion (121) can be selectively received in the limiting groove (113) to fix the first handle (11) and the second handle (12).

8. The masher according to claim 2, characterized in that The second handle (12) comprises: a first rod (122), the first rod (122) being rotatably received in the installation channel (111), one end of the first rod (122) being connected to the second pounding piece (30); A second rod (123), wherein the second rod (123) is arranged outside the installation channel (111), and one end of the second rod (123) is detachably connected to the other end of the first rod (122).

9. The masher according to claim 1, characterized in that A plurality of first weight-reducing holes (24) and a plurality of second weight-reducing holes (34) are respectively formed on the first pounding piece (20) and the second pounding piece (30).

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