Folding knife

Abstract

To provide a folding kitchen knife with a thin handle and a large jaw part, which facilitates cooking, and which enables the free setting of combination of the thickness of the handle and the height of the jaw part.SOLUTION: A folding kitchen knife comprises a handle (4), and an edge (2) having a first supporting point (3) in a handle tail direction. The edge (2) can be housed inside the handle (4). A connection plate (6) for connecting the edge (2) and the handle (4) together is provided. The edge (2) and the connection plate (6) are connected together via the first supporting point (3). The connection plate (6) and the handle (4) are connected together via a second supporting point (7) that is provided in the handle tail direction of the connection plate (6).SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a folding knife, and more particularly to a folding knife that allows for a flexible combination of handle thickness and jaw height. [Background technology]

[0002] A kitchen knife typically has a blade and a handle, with the handle having a blade base (also known as a jaw in the industry) that protrudes from the handle. This jaw is used in cooking, for example, to remove sprouts from potatoes or peel the hollow parts of fruit. Traditionally, when carrying a kitchen knife for cooking while hiking, camping, or in outdoor activities, few foldable knives were available, so people would carry the knife wrapped in a cloth or use a folding knife instead.

[0003] However, if the blade is wrapped in a cloth or the like when carried, the task of wrapping it again after use is cumbersome. Furthermore, due to the structure of a folding knife, a blade with a large jaw and a wide blade width cannot be stored in the handle. For this reason, as shown in the side view of FIG. 7, which shows the blade of the folding chef's knife of Patent Document 1 in an unfolded state, a folding chef's knife (a) has been devised in which the rear end portion (g) of the blade portion (f) is pivotally attached (h) to the tip portion (e) of the handle portion (d) which has a storage groove (c) that opens to the underside (b) of the handle portion (d). The blade portion (f) can be folded by overlapping it with the handle portion (d) while stored in the storage groove (c), and can be unfolded so that it protrudes in a substantially linear manner from the handle portion (d). The blade portion (f) has a blade base (i) that protrudes from the underside (b) of the handle portion (d), and a cutting blade (k) is provided along the entire length from the blade base (i) to the blade tip (j). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Jitsuto No. 3040009 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in order to firmly grip the handle with the fingers, the thickness (height) of the handle's base is generally approximately 3 cm or less. It is also said that it is inconvenient to scoop out potato sprouts unless the jaw height is at least 2.5 cm. In Figure 8, which shows the folding kitchen knife in Patent Document 1 with the blade folded, for example, if the jaw height is 2.5 cm or more, the handle thickness must be 4 cm or more, and if the handle thickness is 3 cm or less, the jaw height must be 1.5 cm or less. For this reason, it is not possible to freely set the combination of handle thickness and jaw height, making it difficult to obtain a folding knife with a thin handle and a large jaw that is easy to use in cooking. [Means for solving the problem]

[0006] A first aspect of the present invention is a folding knife (1) comprising a blade (2) having a first fulcrum (3) in the direction of the butt end of the handle, and a handle (4), wherein the blade (2) can be stored inside the handle (4), and a connecting plate (6) that connects the blade (2) and the handle (4), the blade (2) and the connecting plate (6) are connected at the first fulcrum (3), and the connecting plate (6) and the handle (4) are connected at a second fulcrum (7) provided on the connecting plate (6) in the direction of the butt end of the handle. The first fulcrum (3) is formed by a first shaft (11) passing through a first hole (9) provided on the blade side of the connecting plate (6), and the second fulcrum (7) is formed by a second shaft (12) passing through a second hole (10) provided on the handle end side of the connecting plate (6) engaging with a groove (5) extending in the longitudinal direction provided on the handle (4). It is characterized by the presence of

[0007] A second aspect of the present invention is an invention based on the first aspect, characterized in that the blade (2) has a jaw portion (8) of 0.5 cm to 3.0 cm.

[0009] The present invention 3 The first point of view is or second View of To the point The invention is based on the above, characterized in that the connecting plate (6) has a convex portion (13) extending in the longitudinal direction, the handle (4) has a concave portion (14) extending in the direction of the handle end that slides along the convex portion (13), and the connecting plate (6) and the handle (4) can be fitted together by the convex portion (13) and the concave portion (14).

[0010] The present invention4 The viewpoints are the first and second 3 The invention is based on any one of the above aspects, characterized in that when the blade (2) is stored, the second axis (12) is located on the cutting edge side of the groove (5), and when the knife (1) is used, the second axis (12) moves to the handle end side of the groove (5).

[0011] The present invention 5 The aspect (1) is a folding knife (101) that has a blade (102) having a first fulcrum (103) in the direction of the butt end of the handle, and a handle (104), and the blade (102) can be stored inside the handle (104), and has a connecting plate (106) that connects the blade (102) and the handle (104), the blade (102) and the connecting plate (106) are connected at the first fulcrum (103), and the connecting plate (106) and the handle (104) are connected at a second fulcrum (107) provided in the direction of the butt end of the connecting plate (106), The blade (102) and the handle (104) are not directly connected, The blade (102) has a jaw portion (108) of 0.5 cm to 3.0 cm, the first fulcrum (103) is formed by a first axis (111) passing through a first hole (109) provided on the blade side of the connecting plate (106), and the second fulcrum (107) is formed by a second axis (112) passing through a second hole (110) provided on the handle end side of the connecting plate (106) engaging with a through hole (105) extending in the longitudinal direction provided in the handle (104). [Effects of the Invention]

[0012] In a first aspect of the present invention, a folding knife is provided which comprises a blade (2) having a first fulcrum (3) in the direction of the handle end, and a handle (4), the blade (2) can be housed inside the handle (4), and a connecting plate (6) that connects the blade (2) and the handle (4), the blade (2) and the connecting plate (6) are connected by the first fulcrum (3), and the connecting plate (6) and the handle (4) are connected by a second fulcrum (7) provided in the direction of the handle end of the connecting plate (6), so that a folding knife can be provided in which the combination of handle thickness and jaw height can be freely set. Furthermore, the first fulcrum (3) is constituted by a first axis (11) that passes through a first hole (9) provided on the blade side of the connecting plate (6), and the second fulcrum (7) is constituted by a second axis (12) that passes through a second hole (10) provided on the handle end side of the connecting plate (6) and engages with a longitudinally extending groove (5) provided on the handle (4), thereby providing a folding knife that can store a blade with a large jaw portion inside the handle.

[0013] In the second aspect of the present invention, the blade (2) has a jaw (8) of 0.5 cm to 3.0 cm, so that a blade having a jaw of a desired height can be stored inside the handle.

[0014] In a third aspect of the present invention, the first fulcrum (3) is constituted by a first axis (11) that passes through a first hole (9) provided on the blade side of the connecting plate (6), and the second fulcrum (7) is constituted by a second axis (12) that passes through a second hole (10) provided on the handle end side of the connecting plate (6) and engages with a longitudinally extending groove (5) provided in the handle (4), thereby providing a folding knife that can store a blade with a large jaw portion inside the handle.

[0015] The present invention 3 From this viewpoint, the connecting plate (6) has a convex portion (13) extending in the longitudinal direction, and the handle (4) has a concave portion (14) extending toward the end of the handle that slides along the convex portion (13), and the connecting plate (6) and the handle (4) can be fitted together by the convex portion (13) and the concave portion (14). Therefore, the connecting plate (6) can be stored so that it is not visible from the outside, and a folding knife with an excellent appearance can be provided.

[0016] The present invention 4 From this viewpoint, when the blade (2) is stored, the second axis (12) is located on the cutting edge side of the groove (5), and when the knife (1) is used, the second axis (12) moves to the rear end side of the groove (5) of the handle, so that even a blade with a large jaw portion can be stored inside the handle.

[0017] The present invention 5 From this viewpoint, the knife has a blade (102) having a first fulcrum (103) in the direction of the butt end of the handle, and a handle (104), and the blade (102) can be housed inside the handle (104), and has a connecting plate (106) that connects the blade (102) and the handle (104). However, the blade (102) and the handle (104) are not directly connected. This makes it possible to provide a folding knife in which the combination of handle thickness and jaw height can be freely set. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a perspective view showing a folding knife according to a first embodiment of the present invention. [Figure 2] 1 is a side view showing a state in which the blade of the folding knife of the first embodiment of the present invention is folded. FIG. [Figure 3] 1 is a side view showing a state in which the blade of the folding knife of the first embodiment of the present invention is in the middle of being unfolded. [Figure 4] 1 is a side view showing a state in which the blade of the folding knife of the first embodiment of the present invention is unfolded. [Figure 5] 1 is a side view showing a state in which the folding knife of the first embodiment of the present invention is in use. [Figure 6] FIG. 10 is a perspective view showing a folding knife according to a second embodiment of the present invention. [Figure 7] FIG. 1 is a side view showing the folding kitchen knife of Patent Document 1 in an unfolded state. [Figure 8] FIG. 1 is a side view showing the folding kitchen knife of Patent Document 1 in a folded state. DETAILED DESCRIPTION OF THE INVENTION

[0019] Next, an embodiment of the present invention will be described with reference to the drawings.

[0020] First Embodiment As shown in FIG. 1, in the first embodiment, the folding knife (1) includes a blade (2) having a first fulcrum (3) toward the handle end, and a handle (4). The folding knife (1) also includes connecting plates (6) that connect the blade (2) and the handle (4). The connecting plates (6) are provided on both sides of the blade (2), sandwiching the blade (2). The blade (2) and connecting plate (6) are connected by the first fulcrum (3), and the connecting plate (6) and handle (4) are connected by a second fulcrum (7) provided toward the handle end of the connecting plate (6). The blade (2) is preferably made of metal or ceramic. The handle (4) is preferably made of wood or plastic. The connecting plates (6) are preferably made of metal, wood, or plastic.

[0021] The base of the blade (2) has a jaw (8) that extends from the spine toward the blade. The height of the jaw is preferably 0.5 cm to 3.0 cm, and more preferably 2.0 cm to 2.8 cm. If it is less than 0.5 cm, the fingers cannot adequately hold the knife, and if it exceeds 3.0 cm, it becomes an obstacle when cutting food. The height of the jaw refers to the shortest distance H from the tip of the jaw to the joint between the handle and the blade (also called the "handle base" or "gusset") as shown in Figure 5.

[0022] The first fulcrum (3) is formed by a first shaft (11) passing through a first hole (9) on the blade side of the connecting plate (6), and the second fulcrum (7) is formed by a second shaft (12) passing through a second hole (10) on the butt end of the connecting plate (6) and engaging with a longitudinal groove (5) on the handle (4). The length of the first shaft (11) is the same as the combined thickness of the blade (2) and both connecting plates (6), and the length of the second shaft (12) must be longer than the first shaft (11) and long enough to engage with the grooves (5) on both sides. The first shaft (11) and the second shaft (12) are preferably made of metal.

[0023] The connecting plate (6) has a convex portion (13) extending in the longitudinal direction, and the handle (4) has a concave portion (14) extending toward the end of the handle that slides along the convex portion (13), so that the connecting plate (6) and the handle (4) can be fitted together by the convex portion (13) and the concave portion (14).

[0024] Next, the operation of the folding knife of the first embodiment will be described.

[0025] Fig. 2 is a side view showing the folding knife of the first embodiment of the present invention in a folded state. As shown in Fig. 2, when the blade (2) is housed inside the handle (4), the second axis (12) is on the cutting edge side of the groove (5) (left side in the figure). In addition, the connecting plate (6) is preferably inclined at an angle of 50° to 90° with respect to the longitudinal direction of the handle (4), and more preferably at an angle of 65° to 75°.

[0026] 3 is a side view showing the state in which the blade of the folding knife of the first embodiment of the present invention is being unfolded. The folded blade (2) is unfolded by rotating it clockwise.

[0027] Figure 4 is a side view showing the blade of the folding knife of the first embodiment of the present invention in an unfolded state. As shown in Figure 4, in the unfolded state, the second shaft (12) is on the cutting edge side of the groove (5). Also, the connecting plate (6) is approximately horizontal with the longitudinal direction of the handle (4).

[0028] 5 is a side view showing the folding knife of the first embodiment of the present invention in use. As shown in Fig. 5, in use, the second shaft (12) is moved to the handle end side of the groove (5).

[0029] In the folding knife of the first embodiment, a means for locking the blade 2 in the unfolded state can be added. For example, it is preferable to add a locking blade type locking means that holds the blade in place with a locking mechanism such as a pin or pawl, or a slip joint type locking means that does not have a locking mechanism but instead holds the blade in place with the elastic force of a spring mechanism.

[0030] <Second embodiment> Figure 6 shows a folding knife according to a second embodiment of the present invention. In the second embodiment, the folding knife (101) includes a blade (102) having a first fulcrum (103) toward the rear end of the handle, and a handle (104). The folding knife (101) also includes connecting plates (106) that connect the blade (102) and the handle (104). The connecting plates (106) are provided on both sides of the blade (102), sandwiching the blade (102). The blade (102) and connecting plate (106) are connected by the first fulcrum (103), and the connecting plate (106) and handle (104) are connected by a second fulcrum (107) provided toward the rear end of the connecting plate (106). The base of the blade (102) has a jaw portion (108) extending from the spine toward the blade, and the first fulcrum (103) is formed by a first axis (111) passing through a first hole (109) provided on the blade side of the connecting plate (106), and the second fulcrum (107) is formed by a second axis (112) passing through a second hole (110) provided on the handle end side of the connecting plate (106) engaging with a through hole (105) extending in the longitudinal direction provided in the handle (104).

[0031] The handle 104 is made up of side plates 113, reinforcing plates 114, and a center plate 115, which are joined together using round bars 116, 117, and 118. The side plates 113, reinforcing plates 114, and center plate 115 are preferably made of metal, but may also be made of wood or plastic.

[0032] In the second embodiment, the handle 104 is made of a plate-like member, so a folding knife with a small thickness can be provided. The operation of the folding knife of the second embodiment is the same as that of the folding knife of the first embodiment.

[0033] The first and second embodiments of the present invention make it possible to realize a folding knife with a handle thickness of 3 cm or less near the tip of the handle and a jaw height of 1.5 cm or more, which was previously difficult to achieve. In other words, it is possible to manufacture a folding knife with a freely set combination of handle thickness and jaw height, and to provide a folding knife with a handle thickness and jaw height that is easy to use when cooking. [Explanation of symbols]

[0034] 1,101 knives 2,102 blades 3,103 First Fulcrum 4,104 patterns 5 grooves 105 Through hole 6,106 Connecting plate 7,107 Second Fulcrum 8,108 Chin 9,109 First Hole 10,110 Second hole 11,111 First axis 12,112 Second axis 13,113 convex part 14,114 recesses

Claims

1. A folding knife (1) comprising a blade (2) having a first fulcrum (3) in the direction of the butt end of the handle, and a handle (4), wherein the blade (2) can be stored inside the handle (4), A folding knife having a connecting plate (6) that connects the blade (2) and the handle (4), the blade (2) and the connecting plate (6) being connected by the first fulcrum (3), the connecting plate (6) and the handle (4) being connected by a second fulcrum (7) provided on the connecting plate (6) toward the end of the handle, the first fulcrum (3) being formed by a first axis (11) that passes through a first hole (9) provided on the blade side of the connecting plate (6), and the second fulcrum (7) being formed by a second axis (12) that passes through a second hole (10) provided on the end of the handle of the connecting plate (6) and engages with a groove (5) extending in the longitudinal direction provided on the handle (4).

2. 2. The folding knife according to claim 1, wherein the blade (2) has a jaw portion (8) of 0.5 cm to 3.0 cm.

3. 3. A folding knife according to claim 1 or 2, characterized in that the connecting plate (6) has a convex portion (13) extending in the longitudinal direction, the handle (4) has a concave portion (14) extending in the direction of the handle end that slides along the convex portion (13), and the connecting plate (6) and the handle (4) can be fitted together by the convex portion (13) and the concave portion (14).

4. 4. The folding knife according to claim 1, wherein the second axis (12) is located on the cutting edge side of the groove (5) when the blade (2) is stored, and the second axis (12) moves to the handle end side of the groove (5) when the knife (1) is used.

5. A folding knife (101) comprising a blade (102) having a first fulcrum (103) in the direction of the butt end of the handle, and a handle (104), wherein the blade (102) can be stored inside the handle (104), The knife has a connecting plate (106) that connects the blade (102) and the handle (104), the blade (102) and the connecting plate (106) are connected at the first fulcrum (103), the connecting plate (106) and the handle (104) are connected at a second fulcrum (107) provided in the handle end direction of the connecting plate (106), and the blade (102) and the handle (104) are not directly connected, The blade (102) has a jaw (108) of 0.5 cm to 3.0 cm; The folding knife is characterized in that the first fulcrum (103) is formed by a first axis (111) passing through a first hole (109) provided on the blade side of the connecting plate (106), and the second fulcrum (107) is formed by a second axis (112) passing through a second hole (110) provided on the handle end side of the connecting plate (106) engaging with a through hole (105) extending in the longitudinal direction provided in the handle (104).

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