Cutter body and tool with replaceable blade

Abstract

The present invention provides a blade-replaceable knife body and a tool, the knife body comprising a knife handle (1) and a knife clamp (2) connected to the knife handle, the knife clamp (2) comprising two opposing clamping parts (21), a blade slot (23) for accommodating a blade (3) being formed between the two clamping parts (21); wherein the knife clamp (2) can rotate relative to the knife handle (1) to switch between a locked position and an unlocked position, in which the two clamping parts (21) clamp the blade (3) and the rotation of the knife clamp (2) relative to the knife handle is blocked; in the unlocked position, the width of the blade slot is greater than the thickness of the blade, so that the blade can be inserted into or removed from the blade slot. The knife body and the tool avoid the operation of sharpening the knife, so there is no need to carry a knife sharpener, which is convenient to carry, easy to operate and reduces costs; when the blade is worn, only the blade needs to be replaced, and the knife body itself can be reused to avoid waste.

Description

Technical Field

[0001] The invention relates to a tool, in particular to a tool body capable of conveniently replacing a blade and a tool comprising the tool body and the blade. Background Art

[0002] For existing knives with non-replaceable blades, the blade will be worn during use. When the blade is not sharp enough, it needs to be sharpened on a sharpener. Moreover, after multiple sharpenings, the blade will become narrower and narrower until the entire knife is discarded. Therefore, there are problems such as complicated operations for sharpening and waste caused by discarding the entire knife.

[0003] Moreover, for some knives, such as a reed trimmer knife (it should be noted that, although the present invention uses a reed trimmer knife as an example, the knives of the present invention are not limited to reed trimmer knives, and they can be used for various purposes and applications, and can be formed into various specifications as needed), users often need to carry the knives with them for use at any time, but the existing knives are not portable enough because they need to carry a sharpener at the same time.

[0004] The present invention aims to solve one of the above problems and / or other problems existing in the prior art. Summary of the invention

[0005] According to one aspect of the present invention, there is provided a knife body with replaceable blades, the knife body comprising a knife handle and a knife clamp connected to the knife handle, wherein the knife clamp comprises two opposing clamping parts, a blade slot for accommodating the blade is formed between the two clamping parts; wherein the knife clamp can rotate relative to the knife handle to switch between a locked position and an unlocked position, in which the two clamping parts clamp the blade and the rotation of the knife clamp relative to the knife handle is blocked; in the unlocked position, the width of the blade slot is greater than the thickness of the blade to allow the blade to be inserted into or removed from the blade slot.

[0006] As an example, a groove is formed on the end surface of the tool handle close to the tool holder, the groove being defined by its bottom and side, the end of the tool holder being accommodated in the groove, and the side of the groove being abuttable against the end of the tool holder to block the tool holder in the locked position.

[0007] As an example, the locking position includes a first locking position suitable for left-handed users and a second locking position suitable for right-handed users, the side includes a first side blocking the knife clamp in the first locking position and a second side blocking the knife clamp in the second locking position, and the unlocking position is located between the first locking position and the second locking position.

[0008] As an example, the knife handle includes a knife handle body and a knife handle hoop connected to the knife handle body, the knife clamp is connected to the knife handle hoop and the groove is provided on the knife handle hoop.

[0009] As an example, the tool body further comprises a spindle, one end of which is fixed in the tool holder hoop, and the other end of which extends into the tool holder, and the tool holder can rotate relative to the spindle.

[0010] As an example, the two clamping parts of the tool clamp are respectively formed with recesses at their relative positions to jointly constitute a receiving part for receiving the core shaft, and the outer contour of the core shaft includes a first contour part and a second contour part, wherein the core shaft can rotate in the receiving part so that the first contour part is combined with the receiving part to clamp the two clamping parts, and the second contour part is combined with the receiving part to loosen the two clamping parts.

[0011] As an example, the first contour portion is formed as two arc segments opposite to each other in the radial direction of the core shaft, the second contour portion is formed as two chord segments opposite to each other in the radial direction of the core shaft, and a first distance between the two arc segments is greater than a second distance between the two chord segments.

[0012] As an example, the inner contour of the receiving portion is formed to be complementary to the outer contour of the mandrel, wherein two opposite sections of the receiving portion in the tool holder thickness direction are chord sections, and the distance therebetween is equal to the second distance.

[0013] As an example, the mandrel includes a plurality of first contour portions and a plurality of second contour portions, which are arranged alternately in the circumferential direction of the mandrel.

[0014] As an example, the tool holder includes a connecting portion connecting two clamping portions, the connecting portion being located between a first end and a second end of the tool holder in a transverse direction of the tool holder, wherein the insert slot is formed at the first end.

[0015] As an example, the connecting portion and the two clamping portions jointly define a blade slot, wherein the position of the connecting portion is arranged to limit the insertion of the blade in the transverse direction.

[0016] As an example, an inner hole is formed in the tool handle band, and the inner contour of the inner hole is complementary to the outer contour of the mandrel to fix the mandrel in the tool handle band in a non-rotatable manner.

[0017] As an example, the mandrel is formed with a shoulder at one end thereof away from the tool holder, and the tool holder is formed with a step inside thereof that cooperates with the shoulder to position the tool holder in the longitudinal direction.

[0018] As an example, an end of each clamping portion close to the tool handle is formed with an arc-shaped portion on a side close to the blade slot.

[0019] According to another aspect of the present invention, a tool is provided. The tool comprises a tool body according to any one of the above examples and a blade replaceably disposed in a blade slot of the tool body.

[0020] In the knife body and the knife of each exemplary structure, since the knife clamp can be switched between the locked position and the unlocked position, the blade can be conveniently replaced and the operation of sharpening the knife can be avoided. Therefore, there is no need to carry a knife sharpener, and the knife is portable, easy to operate and reduces the cost. Moreover, when the blade is worn, only the blade needs to be replaced, and the knife body itself can be reused to avoid waste. When the knife is not in use, the blade can be removed from the knife body and stored to avoid accidental damage caused by the blade. Since the knife clamp can be unlocked by rotating it relative to the knife handle, the operation of replacing the blade is simple and easy. Furthermore, by setting the two side parts on the groove of the knife handle hoop to block the knife clamp in two different directions, the different operation requirements of left-handed and right-handed users are met, which is more user-friendly. The mandrel plays the role of connecting the knife clamp to the knife handle on the one hand, and plays the role of adjusting the two clamping parts of the knife clamp to loosen and clamp in a cam manner on the other hand. The design is exquisite, making the knife body compact. And the first contour part of the mandrel is formed as a relative arc section, the second contour part is formed as a relative chord section, and the two are arranged in a staggered structure, which is convenient for the manufacture of the mandrel and makes the conversion operation of the knife clamp between the loose and clamped states smoother. And because the connecting portion of the tool clamp is designed to be located between the first end and the second end of the tool clamp, it not only serves as a pivot point of the clamping portion, but also limits the insertion of the blade, facilitating the user's operation when inserting the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic front view of an exemplary tool according to the present invention is shown;

[0022] Figure 2 Show Figure 1 A schematic cross-sectional view of the tool shown;

[0023] Figure 3 Show Figure 2 A schematic diagram of a front view of a tool holder in a tool in FIG.

[0024] Figure 4 Show Figure 3 A schematic top view of the tool holder in FIG.

[0025] Figure 5 Show Figure 2 A schematic diagram of a main view of a mandrel in FIG.

[0026] Figure 6 Show Figure 5 A bottom view of the mandrel in FIG.

[0027] Figure 7 Show Figure 2 A schematic front view of a tool handle hoop in a tool in the embodiment of the present invention;

[0028] Figure 8 Show Figure 7A schematic top view of the knife handle hoop in FIG.

[0029] Fig. 9 Show Figure 2 a schematic diagram of a tool handle body in a tool in; and

[0030] Fig.10 A schematic front view of an exemplary blade is shown. DETAILED DESCRIPTION

[0031] The technical solution of the present invention is further specifically described below by way of examples and in conjunction with the accompanying drawings. It should be noted that the description of the embodiments of the present invention is intended to explain the overall concept of the present invention and should not be construed as a limitation of the present invention.

[0032] In addition, in the following detailed description, for the purpose of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. However, it is apparent that one or more embodiments may also be implemented without these specific details.

[0033] Figure 1-10 A schematic diagram of an exemplary cutting tool is shown. The cutting tool includes a cutting tool body and a blade 3 replaceably disposed in a blade groove of the cutting tool body. The cutting tool can be used, for example, to repair the reed of a musical instrument. Those skilled in the art will appreciate that, although the cutting tool for repairing reeds is mentioned in the diagram and description or is used as an example, the cutting tool body and the cutting tool of the present invention are not limited to being used for repairing reeds, and their structural features enable them to be applied to various occasions, such as daily knives, kitchen knives or other special occasions, and can obtain various advantages brought by their structure, such as convenient blade replacement and portability. The following text will take the cutting tool body and the cutting tool for repairing reeds as an example to describe the specific structure and advantages of the cutting tool body for clamping the blade and the cutting tool including the cutting tool body and the cutting tool.

[0034] like Figure 1 , 2 As shown, the knife body includes a knife handle 1 and a knife clamp 2 connected to the knife handle 1. Figure 4 As shown, the tool holder 2 includes two opposing clamping parts 21 and a connecting part 22 connecting the two clamping parts 21, and a blade slot 23 for accommodating the blade 3 is formed between the two clamping parts 21. Figure 1 , 2 The tool holder 2 can be rotated relative to the tool handle 1 to switch between a locked position and an unlocked position. In the locked position, the two clamping parts 21 clamp the blade 3 and the rotation of the tool holder 2 relative to the tool handle is blocked; in the unlocked position, the two clamping parts 21 are loosened, and the width of the blade slot 23 therebetween is therefore greater than the thickness of the blade to allow the blade to be inserted into or removed from the blade slot.

[0035] In this example, since the knife clamp 2 can be switched between the locked position and the unlocked position, the blade can be replaced in the unlocked position and the blade can be used in the locked position. The knife body makes it easy to replace the blade without the need for sharpening, so there is no need to carry a sharpener, making the knife portable, easy to operate and reducing costs; and when the blade is worn, only the blade needs to be replaced (a disposable blade can be used), the knife body itself can be reused to avoid waste, and the blade 3 can be removed from the knife body and stored when the knife is not in use, avoiding accidental damage caused by the blade 3. Further, the knife clamp 2 rotates relative to the knife handle 1 to switch between the locked position and the unlocked position, making the blade replacement operation simple and easy. Preferably, the unlocked position and the locked position can be marked on the knife handle in the form of graphics, letters or text (for example, it can also be subdivided into a locked position for left-handed users and a locked position for right-handed users, which will be further described below) to facilitate user operation.

[0036] As an example of a structure for blocking the tool holder 2 in the locked position, Figure 2 , 7 As shown in Figures 8 and 9, the knife handle 1 includes a knife handle body 11 and a knife handle hoop 12 fixedly connected to the knife handle body 11. A groove 13 is formed on the end surface of the knife handle hoop 12 close to the tool holder 2, and the groove is defined by its bottom and side. The end of the tool holder 2 is accommodated in the groove, and the side can abut against the end to block the tool holder 2 in the locked position. It should be pointed out that although the knife handle 1 is described as consisting of the knife handle body 11 and the knife handle hoop 12 in the description of this article and the accompanying drawings, it can be understood by those skilled in the art that the knife handle 1 can also be a one-piece piece, in which case the core shaft 4 is directly connected to the knife handle 1 and the groove can be formed in the end of the knife handle 1. Those skilled in the art can select the material of the knife handle or the knife handle body and the knife handle hoop as needed.

[0037] Exemplarily, in order to facilitate the use of the user, the locking position may include a first locking position suitable for left-handed users and a second locking position suitable for right-handed users. Figure 8 As shown, the side of the groove 13 on the end surface of the handle hoop 12 includes a first side 131 that blocks the knife clamp 2 in the first locking position and a second side 132 that blocks the knife clamp in the second locking position, and the unlocking position is located between the first locking position and the second locking position. This structure is particularly advantageous when the knife is used to repair the reed, because when repairing the reed, the blade needs to exert force in one direction relative to the reed, so it is necessary to block the knife clamp from rotating in the opposite direction, and left-handed users have different requirements for this direction. The use of this exemplary structure of the present invention meets the different operating requirements of left-handed users and is more user-friendly.

[0038] The following will be combined Figure 1-6, an example of a structure for realizing that the two clamping parts 21 of the tool holder 2 clamp or release the blade 3 is described. Figure 2 As shown, the tool body also includes a mandrel 4, the lower end of the mandrel 4 is fixed in the tool handle hoop 12, the upper end extends into the tool holder 2, and the upper end of the mandrel 4 is formed with a shoulder 33 (at Figure 5 ), the interior of the tool holder 2 is formed with a step that cooperates with the shaft shoulder 33, and the two abut against each other to position the tool holder 2 in the longitudinal direction, whereby the tool holder 2 is connected to the tool holder hoop 12 through the core shaft 4 and then connected to the tool holder 1.

[0039] like Figure 4 As shown, the two clamping parts 21 of the tool holder 2 are respectively formed with recesses at their opposite positions to jointly form a receiving part 211 for receiving the spindle 4. Figure 4 In the example shown, the connecting portion 22 is located at a first end of the tool holder 2 (i.e., an end where the insert slot is formed) in the transverse direction of the tool holder 2. Figure 4 middle left end) and the second end ( Figure 4 The accommodating portion 211 is formed at the second end. Therefore, the two clamping portions of the tool holder 2 can pivot with the connecting portion 22 as a fulcrum. The mandrel 4 can rotate in the accommodating portion 211, and its outer contour is combined with the inner contour of the accommodating portion 211 in the form of a cam to actuate the two clamping portions 21 to pivot around the connecting portion 22. In this exemplary structure of the present invention, the mandrel 4 plays the role of connecting the tool holder 2 to the tool handle 1 on the one hand, and plays the role of adjusting the loosening and clamping of the two clamping portions 21 of the tool holder 2 in the form of a cam on the other hand. The design is exquisite, making the tool body structure compact and beautiful.

[0040] exist Figure 4 , 6 In the specific example shown, the outer contour of the core shaft 4 is formed to include a first contour portion 41 and a second contour portion 42. The first contour portion 41 is formed as two arc segments opposite to each other in the radial direction of the core shaft (the two together constitute the first contour portion 41 in the form of a large diameter portion), and the diameter is d1. The second contour portion 42 is formed as two chord segments 42 opposite to each other in the radial direction of the core shaft (the two together constitute the second contour portion 42 in the form of a small diameter portion). The first distance between the two arc segments, i.e., the diameter d1, is greater than the second distance d2 between the two chord segments. Figure 6 In the example of , the outer contour includes three first contour portions 41, i.e., large diameter portions, and three second contour portions 42, i.e., small diameter portions, and the large diameter portions and the small diameter portions are arranged alternately. Figure 4 As shown, the inner contour of the receiving portion 211 in the tool holder 2 for receiving the mandrel 4 is formed to be complementary to the outer contour of the mandrel 4, and as shown in FIG. Figure 4 As shown, two sections 212 of the receiving portion 211 that are opposite to each other in the thickness direction of the tool holder 2 are chord sections, and the distance between the two is equal to the second distance d2.

[0041] When the tool holder 2 is twisted relative to the tool handle 1, the receiving portion 211 of the clamping portion 21 of the tool holder 2 rotates relative to the spindle 4. When the two sections 212 ( Figure 4 ) is combined with the first contour portion 41 on the outer contour of the mandrel 4, i.e., the two arc sections of the large diameter portion, because the diameter d1 of the large diameter portion is greater than the distance d2 between the two sections 212, the two clamping portions 21 are spread apart, the two clamping portions 21 pivot relative to the connecting portion 22, and the distance between the two is reduced at the first end (i.e., the end where the blade slot 23 is formed), and the blade 3 is clamped therein. When the accommodating portion 211 rotates relative to the mandrel 4 until the two sections 212 are combined with the second contour portion 42 of the mandrel 4, i.e., the two chord sections of the small diameter portion, the distance between the two is equal, and the loading of the mandrel 4 on the clamping portion 21 is released, i.e., the clamping portion is no longer spread apart, and the distance between the two clamping portions at the first end, i.e., the width of the blade slot, is increased, and at this time, the blade is allowed to be inserted into or removed from the blade slot 23.

[0042] In the above example, the first contour portion 41 of the core shaft 4 is formed into relative arc segments, and the second contour portion 42 is formed into relative chord segments, which are staggered to facilitate the manufacture of the core shaft and make the tool holder's switching operation between the loosened and clamped states smoother.

[0043] Those skilled in the art will understand that, although the above text describes the specific structure of the outer contour of the core shaft and the inner contour of the accommodating portion 211 of the tool holder 2 shown in the figure, the shape and number of the first contour portion 41 and the second contour portion 42 on the core shaft and the inner contour of the accommodating portion are not limited thereto, as long as the outer contour of the core shaft 4 can interact with the inner contour of the accommodating portion 211 in the form of a cam.

[0044] As described above, the positions of the first side portion 131 and the second side portion 132 of the groove 13 should be designed so that when the tool holder 2 is rotated to a position blocked by the first side portion 131 or the second side portion 132, the tool holder 2 can be in a clamped state of the two clamping portions 21, that is, the two opposite sections 212 of the accommodating portion 211 of the tool holder in the thickness direction are combined with the first contour portion 41 on the core shaft 4, that is, the two arc sections of the large diameter portion. This can be achieved by designing the shape of the groove 13, such as the positions of the first side portion 131 and the second side portion 132. Further, as Figure 8 As shown, the groove 13 may further include an arc portion 133 between the first side portion 131 and the second side portion 132 , and the arrangement of the arc portion facilitates the rotation of the second end of the tool holder.

[0045] As described above, the mandrel 4 is fixed in the handle 1, preferably in the handle hoop 12. Figure 8As shown, an inner hole 124 is formed in the tool handle hoop 12, and the inner contour of the inner hole is complementary to the outer contour of the mandrel 3 to fix the mandrel 3 non-rotatably in the tool handle hoop 12. Therefore, the positioning of the outer contour of the mandrel 4, that is, the orientation of the arc segment and the chord segment, is consistent with the positioning of the inner contour of the inner hole. Figure 8 In the example of FIG. 1 , the inner contour of the inner hole 124 is positioned so that Figure 8 The lateral direction of the core axis 4 is two opposite chord sections, so that the core axis 4 has the same orientation. Figure 4 When the tool holder 2 is rotated to a position approximately in the middle of the groove 13, two chord sections in the thickness direction of the tool holder 2 are combined with two chord sections of the spindle 4, so that the tool holder is in a loose state. This position can be identified as an unlocked position.

[0046] In addition, if Figure 1-3 As shown, an end of each clamping portion 21 of the tool holder 2 close to the tool handle is formed with an arc portion 213 on one side close to the blade slot. The arc portion 213 is arranged to leave a certain space, so that the user can operate the tool holder 2 by hand.

[0047] Further, in Figure 4 In the example shown, the connecting portion 22 is located between the first end and the second end of the tool holder 2. On the one hand, the connecting portion 22 plays the role of a pivot point as described above, and on the other hand, the connecting portion 22 can also limit the insertion of the blade. Figure 4 As shown, the connection portion 22 and the two clamping portions 21 together define the blade slot 23, and the position of the connection portion 22 can be designed to limit the insertion of the blade 3 along the lateral direction of the tool holder 2, that is, the blade 3 is inserted from the first end of the tool holder 2 into the blade slot 23 until it abuts against the connection portion 22, indicating that the blade 3 is inserted in place, and at this time, the blade edge 31 just exposes the first end of the tool holder 2 to achieve the required operation. Therefore, the setting of the connection portion 22 also facilitates the operation of the user when inserting the blade.

[0048] like Figure 4 As shown, the tool holder 2 has a thickness that decreases from the second end accommodating the core shaft 4 toward the end where the blade groove is located. On the one hand, this saves material, and on the other hand, it is adapted to the thickness of the blade at the front end of the tool holder (i.e., the first end), making the tool holder 2 more beautiful as a whole.

[0049] Although some embodiments of the present general inventive concept have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the present general inventive concept, the scope of which is defined in the claims and their equivalents.

Claims

1. A knife body with replaceable blades, characterized in that: The knife body comprises: a knife handle (1); and A knife clamp (2) connected to the knife handle (1), wherein the knife clamp (2) comprises two opposing clamping parts (21), and a blade groove (23) for accommodating the blade (3) is formed between the two clamping parts (21); The knife clamp (2) is capable of rotating relative to the knife handle (1) to switch between a locked position and an unlocked position, wherein in the locked position, the two clamping parts (21) clamp the blade (3) and the rotation of the knife clamp (2) relative to the knife handle is blocked; in the unlocked position, the distance between the two clamping parts (21) increases so that the width of the blade slot is greater than the thickness of the blade, thereby allowing the blade to be inserted into or removed from the blade slot; A groove (13) is formed on the end surface of the tool handle (1) close to the tool holder (2), and the groove (13) is defined by its bottom and side. The end of the tool holder (2) is accommodated in the groove, and the side of the groove (13) can abut against the end of the tool holder to block the tool holder (2) at the locking position.

2. The blade body according to claim 1, characterized in that: The locking position includes a first locking position suitable for left-handed users and a second locking position suitable for right-handed users, the side portion includes a first side portion (131) blocking the tool clamp in the first locking position and a second side portion (132) blocking the tool clamp in the second locking position, and the unlocking position is located between the first locking position and the second locking position.

3. The blade body according to claim 1 or 2, characterized in that: The knife handle (1) comprises a knife handle body (11) and a knife handle hoop (12) connected to the knife handle body (11), the knife clamp (2) is connected to the knife handle hoop (12) and the groove (13) is arranged on the knife handle hoop (12).

4. The blade body according to claim 3, characterized in that: The knife body also includes a core shaft (4), one end of which is fixed in the knife handle hoop (12), and the other end of which extends into the knife clamp (2), and the knife clamp (2) can rotate relative to the core shaft (4).

5. The blade body according to claim 4, characterized in that: The two clamping parts (21) are respectively formed with recesses at their relative positions to jointly constitute a receiving part (211) for receiving the core shaft, and the outer contour of the core shaft (4) includes a first contour part and a second contour part, wherein the core shaft (4) can rotate in the receiving part (211), so that the first contour part is combined with the receiving part to clamp the two clamping parts (21), and the second contour part is combined with the receiving part to loosen the two clamping parts (21).

6. The blade body according to claim 5, characterized in that: The first contour portion (41) is formed as two circular arc segments opposite to each other in the radial direction of the core shaft, and the second contour portion (42) is formed as two chord segments opposite to each other in the radial direction of the core shaft, and a first distance between the two circular arc segments is greater than a second distance between the two chord segments.

7. The blade body according to claim 6, characterized in that The inner contour of the receiving portion (211) is formed to be complementary to the outer contour of the core shaft (4), wherein two sections of the receiving portion (211) opposite to each other in the thickness direction of the tool holder (2) are chord sections, and the distance between the two is equal to the second distance.

8. The blade body according to claim 1, characterized in that: The tool holder (2) comprises a connecting portion (22) connecting two clamping portions (21), wherein the connecting portion (22) is located between a first end and a second end of the tool holder (2) in a transverse direction of the tool holder (2), wherein the blade groove (23) is formed at the first end.

9. The blade body according to claim 8, characterized in that: The connecting portion (22) and the two clamping portions (21) jointly define the blade slot (23), wherein the position of the connecting portion (22) is arranged to stop the insertion of the blade (3) along the transverse direction.

10. The blade according to any one of claims 4 to 7, characterized in that: An inner hole (124) is formed in the tool handle hoop (12), and an inner contour of the inner hole is complementary to an outer contour of the core shaft (4) so ​​as to fix the core shaft (4) in the tool handle hoop (12) in a non-rotatable manner.

11. A cutting tool, characterized in that: The tool comprises a tool body according to any one of claims 1 to 10 and a blade (3) replaceably arranged in a blade slot (23) of the tool body.

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