A blade turning structure for a folding knife

Abstract

The utility model discloses a folding knife's head turning structure, including drive part, knife head assembly and positioning structure, drive part axially movably set up in the knife shell, and the front end of drive part is equipped with a drive groove, the one side of knife head assembly is provided with first pin shaft corresponding drive part, and the other side of knife head assembly is provided with second pin shaft relative to drive part, and first pin shaft and second pin shaft are staggered and set up on the horizontal projection, and knife head assembly is rotatably connected in the knife shell through second pin shaft, and first pin shaft extends into the drive groove, positioning structure includes setting up the positioning part of button and setting up the first positioning slot and second positioning slot of knife shell, and the front end of second positioning slot is axially spaced and located at first positioning slot, and button is telescopically installed in drive part, and the elastic piece is arranged between button and drive part, and this turning structure is simple, and the adopted spare parts are fewer, and the operation is more efficient, convenient.

Description

Technical Field

[0001] This utility model relates to the technical field of cutting tools, and in particular to a blade tip turning structure for a folding knife. Background Technology

[0002] Utility knives and scrapers are usually used separately. Utility knives are used to cut softer objects, while scrapers are used to scrape off stickers, advertising paper, and other unwanted materials on flat surfaces. Both tools have limited functions, and both utility knives and scrapers are required to achieve the purpose of cutting and scraping, which is not only costly but also inconvenient to carry.

[0003] However, the existing folding knife has a complex blade turning structure, requiring a separate switching device to change the blade posture. This not only requires more parts but is also inconvenient to operate, so improvements are needed. Summary of the Invention

[0004] The purpose of this invention is to provide a blade tip steering structure for a folding knife. The steering structure is simple, uses fewer parts, and is more efficient and convenient to operate.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a blade tip steering structure for a folding knife, comprising a driving component, a blade tip assembly, and a positioning structure. The driving component is axially movably disposed within the blade housing, and a driving groove is provided at the front end of the driving component. A first pin is provided on one side of the blade tip assembly corresponding to the driving component, and a second pin is provided on the other side of the blade tip assembly relative to the driving component. The first pin and the second pin are offset in horizontal projection. The blade tip assembly is rotatably connected to the blade housing via the second pin, and the first pin extends into the driving groove. The positioning structure includes a positioning part disposed on a button and a first positioning groove and a second positioning groove disposed on the blade housing. The second positioning groove is axially... A button is retractably mounted on the drive unit, spaced at the front end of the first positioning groove, and an elastic element abuts against the button and the drive unit. In the initial state, the cutter assembly is arranged along the axial direction and the blade part of the cutter assembly is exposed outside the blade shell. It is positioned and locked in the first positioning groove by the positioning part to keep the cutter assembly in the utility knife posture. When it is necessary to switch the scraper posture, the button needs to be pressed down to release the positioning part from the second positioning groove, and then the drive unit is driven to retract by the button. The first pin shaft drives the cutter assembly to rotate around the second pin shaft as the rotation axis to the direction parallel to the axial direction under the drive groove wall, and is positioned and locked in the second positioning groove by the positioning part to keep the cutter assembly in the utility knife posture.

[0006] Furthermore, the driving component is provided with a sliding groove arranged along the axial direction, and the inner wall of the blade housing is provided with a fixing post extending into the sliding groove, the fixing post being adapted to the width of the sliding groove.

[0007] Furthermore, two fixing posts are provided and are axially spaced apart on the inner wall of the blade housing.

[0008] Furthermore, the driving groove is a horizontally arranged strip groove at the front end of the driving component, and the width of the strip groove is adapted to the first pin.

[0009] Furthermore, the length of the drive groove is equal to or equal to the distance by which the first pin rotates 90° around the second pin.

[0010] Furthermore, the blade housing is provided with a front limiting part and a rear limiting part. When the button abuts against the front limiting part, the button and the driving member are restricted from continuing to move forward. When the button abuts against the rear limiting part, the button and the driving member are restricted from continuing to move backward.

[0011] Furthermore, when the button abuts against the front limit portion, the second positioning groove is located directly above the positioning portion. At this time, the force applied to the button is removed, and the positioning portion abuts into the second positioning groove under the elastic force of the elastic member and is positioned and engaged with the second positioning groove. When the button abuts against the rear limit portion, the first positioning groove is located directly above the positioning portion. At this time, the force applied to the button is removed, and the positioning portion abuts into the first positioning groove under the elastic force of the elastic member and is positioned and engaged with the first positioning groove.

[0012] Furthermore, the positioning parts are symmetrically arranged on both sides of the button, and the blade shell is provided with a first positioning groove and a second positioning groove corresponding to the positioning parts on both sides.

[0013] Furthermore, the rear end of the drive unit is provided with a slot, and the button is provided with a plug portion that is adapted to the slot. The plug portion is inserted into the slot and can extend and retract along the slot in the height direction.

[0014] Furthermore, at least one third positioning groove is provided on the blade housing at the position between the first positioning groove and the second positioning groove. When the button is moved to the position of the positioning part corresponding to the third positioning groove and the button is released, the driving member is locked in the current position and the blade assembly is kept at the current angle.

[0015] In summary, this utility model has the following beneficial effects: The blade head steering structure of this utility model is simple, uses fewer parts, and is more efficient and convenient to operate. The specific operation steps are as follows: When it is necessary to switch from utility knife posture to scraper posture, the button needs to be pressed down to release the positioning part from the first positioning groove. Then, the driving component is driven forward by the button. The first pin shaft drives the blade head assembly to rotate about the second pin shaft as the rotation axis to the direction orthogonal to the axis, and is locked in the second positioning groove by the positioning part to keep the blade head assembly in scraper posture. When it is necessary to switch to scraper posture, the button needs to be pressed down to release the positioning part from the second positioning groove. Then, the driving component is driven back by the button. The first pin shaft drives the blade head assembly to rotate about the second pin shaft as the rotation axis to the direction parallel to the axis, and is locked in the second positioning groove by the positioning part to keep the blade head assembly in utility knife posture. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a folding knife.

[0017] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 3 This is the utility model Figure 2 Sectional view at point A.

[0019] Figure 4 This is an exploded view of the present invention.

[0020] Figure 5 This is a schematic diagram of the internal structure of the blade shell of this utility model.

[0021] Figure 6 This is a schematic diagram of the positioning groove of this utility model.

[0022] Figure 7 This is a schematic diagram of the button structure of this utility model.

[0023] Figure 8 This is a schematic diagram of the cutter head assembly of this utility model.

[0024] In the diagram: 10. Drive unit; 11. Drive groove; 12. Slide groove; 20. Cutter head assembly; 21. Tool holder; 211. First pin; 212. Second pin; 22. Blade; 30. Positioning structure; 31. Positioning part; 32. First positioning groove; 33. Second positioning groove; 34. Third positioning groove; 40. Tool housing; 41. Fixing post; 42. Front limit part; 43. Rear limit part; 44. Positioning groove; 50. Button; 51. Drive unit; 52. Plug-in part; 60. Elastic element; 70. Tool holder. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] For ease of understanding, the terms "upper," "lower," "left," "right," "front," and "rear" used in this utility model are as described in the appendix to the specification. Figure 5 Based on, the instruction manual is attached. Figure 5 The length of the central groove 12 is the axis of defense, and the direction of the cutter head is the front side.

[0029] like Figures 1-8 As shown, a folding knife's blade steering structure includes a drive member 10, a blade assembly 20, and a positioning structure 30. The drive member 10 is axially movably disposed within a blade housing 40, and a drive groove 11 is provided at the front end of the drive member 10. A first pin 211 is provided on one side of the blade assembly 20 corresponding to the drive member 10, and a second pin 212 is provided on the other side of the blade assembly 20 relative to the drive member 10. The first pin 211 and the second pin 212 are offset in horizontal projection. The blade assembly 20 is rotatably connected to the blade housing 40 via the second pin 212, and the first pin 211 extends into the drive groove 11. Specifically, the blade assembly 20 includes a blade holder 21 and a blade 22 mounted on the blade holder 21. The first pin 211 and the second pin 212 are disposed on both sides of the blade holder 21. A positioning groove 44 adapted to the second pin 212 is provided on the drive member 10, and the second pin 212 is rotatably connected within the positioning groove 44.

[0030] The positioning structure 30 includes a positioning part 31 disposed on the button 50 and a first positioning groove 32 and a second positioning groove 33 disposed on the blade housing 40. The second positioning groove 33 is axially spaced at the front end of the first positioning groove 32. The button 50 is telescopically mounted on the driving member 10. An elastic member 60 is provided between the button 50 and the driving member 10. Specifically, the button 50 includes a driving part 51 disposed outside the blade housing 40 and a plug-in part 52 for connecting the driving member 10. The blade housing 40 is provided with a clearance groove for the axial movement of the button 50. The elastic member 60 is disposed between the plug-in part 52 and the driving member 10.

[0031] When it is necessary to switch the scraper posture, the button 50 must be pressed down first to release the positioning part 31 from the first positioning groove 32. Then, the drive member 10 is driven forward by the button 50. The first pin 211, driven by the groove wall of the drive groove 11, drives the blade assembly 20 to rotate about the second pin 212 as the rotation axis to be orthogonal to the axis direction. The positioning part 31 then locks the blade assembly 20 in the second positioning groove 33 to keep the blade posture. Similarly, when it is necessary to switch the scraper posture, the button 50 must be pressed down first to release the positioning part 31 from the second positioning groove 33. Then, the drive member 10 is driven back by the button 50. The first pin 211, driven by the groove wall of the drive groove 11, drives the blade assembly 20 to rotate about the second pin 212 as the rotation axis to be parallel to the axis direction. The positioning part 31 then locks the blade assembly 20 in the second positioning groove 33 to keep the blade posture.

[0032] The folding knife includes a handle, and the blade shell 40 is rotatably connected to the handle 70 via a pivot. The handle 70 has a receiving cavity with one end open. The blade shell 40 can switch between a stored state where it is rotated into the receiving cavity and a used state where it is rotated out of the receiving cavity. In the initial state, the blade assembly 20 is arranged along the axial direction and the blade 22 of the blade assembly 20 is partially exposed outside the blade shell 40. It is positioned and locked in the first positioning groove 32 by the positioning part 31 so that the blade assembly 20 maintains the utility knife posture. In the stored state, the blade 22 of the blade assembly 20 is also partially exposed outside the blade shell 40. Since the exposed part of the blade 22 is covered by the handle 70, there is no safety hazard.

[0033] In some embodiments, the driving member 10 is provided with a sliding groove 12 arranged along the axial direction, and the inner wall of the blade housing 40 is provided with a fixing post 41 extending into the sliding groove 12. The width of the fixing post 41 is adapted to the width of the sliding groove 12. The fixing post 41 cooperates with the sliding groove 12 to limit the movement direction of the driving member 10, that is, to restrict the movement of the driving member 10 in the axial direction. Of course, the sliding cooperation between the fixing post 41 and the sliding groove 12 can also guide the movement of the driving member 10. In this embodiment, the cross-sectional shape of the fixing post 41 is preferably rectangular.

[0034] Furthermore, two fixing posts 41 are provided and axially spaced on the inner wall of the blade housing 40. The purpose of providing two fixing posts 41 is to make the axis of the driving component 10 move more smoothly. Since two fixing posts 41 are axially provided, the cross-section of the cylinder is preferably circular. Not only is the circular shape easier to process, but the sliding friction with the driving component 10 is also smaller.

[0035] In some embodiments, the drive groove 11 is a horizontally arranged strip-shaped groove at the front end of the drive member 10. The width of the strip-shaped groove is adapted to the first pin 211. When the drive member 10 moves forward, the drive member 10 drives the first pin 211 forward through the rear wall of the drive groove 11, so that the blade assembly 22 rotates in a direction orthogonal to the axis. When the drive member 10 moves backward, the drive member 10 drives the first pin 211 backward through the front wall of the drive groove 11, so that the blade assembly 22 rotates in a direction parallel to the axis. The purpose of setting the drive groove 11 as a strip-shaped groove that matches the first pin 211 is to ensure that the drive member 10 can drive the cutter head assembly 20 to move synchronously when moving forward or backward. Further, the length of the drive groove 11 is equal to or longer than the distance by which the first pin 211 rotates 90° around the second pin 212. This setting is to prevent the cutter head assembly 20 from not rotating into position.

[0036] In some embodiments, the cutter housing 40 is provided with a front limiting portion 42 and a rear limiting portion 43. When the button 50 abuts against the front limiting portion 42, the button 50 and the drive member 10 are restricted from continuing to move forward. When the button 50 abuts against the rear limiting portion 43, the button 50 and the drive member 10 are restricted from continuing to move backward. By providing the front limiting portion 42 and the rear limiting portion 43, the axial movement stroke of the button 50 is limited, thereby limiting the axial movement stroke of the drive member 10, and thus limiting the rotation angle range of the cutter head assembly 20.

[0037] In some embodiments, when the button 50 abuts against the front limit portion 42, the second positioning groove 33 is located directly above the positioning portion 31. At this time, the downward force on the button 50 is removed, and the positioning portion 31 abuts into the second positioning groove 33 under the elastic force of the elastic member 60 and is positioned and engaged with the second positioning groove 33. When the button 50 abuts against the rear limit portion 43, the first positioning groove 32 is located directly above the positioning portion 31. At this time, the downward force on the button 50 is removed, and the positioning portion 31 abuts into the first positioning groove 32 under the elastic force of the elastic member 60 and is positioned and engaged with the first positioning groove 32.

[0038] In some embodiments, the positioning parts 31 are symmetrically arranged on both sides of the button 50, and the blade shell 40 is provided with a first positioning groove 32 and a second positioning groove 33 corresponding to the positioning parts 31 on both sides. The purpose of this arrangement is to improve the positioning effect and solve the problem of unstable positioning on one side.

[0039] In some embodiments, the rear end of the drive member 10 is provided with a slot, and the button 50 is provided with a plug portion 52 adapted to the slot. The plug portion 52 is inserted into the slot and can extend and retract along the slot in the height direction. Under the action of the elastic member 60, the button 50 has a tendency to abut against the first positioning groove 32 or the second positioning groove 33.

[0040] In some embodiments, the blade housing 40 is further provided with at least one third positioning groove 34 at the position between the first positioning groove 32 and the second positioning groove 33. When the button 50 is moved to the position of the positioning part 31 corresponding to the third positioning groove 34 and the button 50 is released, the drive member 10 is locked in the current position and the blade assembly 20 is kept at the current angle. For example, the third positioning groove 34 is provided at the position between the first positioning groove 32 and the second positioning groove 33. When the positioning part 31 of the button 50 is positioned and abuts into the third positioning groove 34, the blade assembly 20 is set at 45° with the axial direction. Of course, it can also be positioned at other angles such as 30° and 60°. Only the position of the third positioning groove 34 needs to be adjusted.

[0041] In summary, this utility model has the following beneficial effects: The blade head steering structure of this utility model is simple, uses fewer parts, and is more efficient and convenient to operate. The specific operation steps are as follows: When it is necessary to switch from utility knife posture to scraper posture, the button 50 needs to be pressed down to release the positioning part 31 from the first positioning groove 32. Then, the driving part 10 is driven forward by the button 50. The first pin 211 drives the blade head assembly 20 to rotate about the second pin 212 as the rotation axis to be orthogonal to the axis direction, and passes through the positioning part 31. 1. The positioning part is locked in the second positioning groove 33 so that the blade assembly 20 maintains the scraper posture. When it is necessary to switch the scraper posture, the button 50 needs to be pressed down first to release the positioning part 31 from the second positioning groove 33. Then, the drive member 10 is driven to retract by the button 50. The first pin 211 drives the blade assembly 20 to rotate around the second pin 212 as the rotation axis to a direction parallel to the axis. The positioning part 31 is then locked in the second positioning groove 33 so that the blade assembly 20 maintains the utility knife posture.

[0042] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A blade-turning structure for a folding knife, characterized in that: include A driving component (10) is axially movable inside the cutter housing (40), and a driving groove (11) is provided at the front end of the driving component (10). The cutter head assembly (20) has a first pin (211) on one side of the drive member (10) and a second pin (212) on the other side of the cutter head assembly (20) relative to the drive member (10). The first pin (211) and the second pin (212) are offset in the horizontal projection. The cutter head assembly (20) is rotatably connected to the cutter housing (40) through the second pin (212). The first pin (211) extends into the drive groove (11). The positioning structure (30) includes a positioning part (31) disposed on the button (50) and a first positioning groove (32) and a second positioning groove (33) disposed on the blade shell (40). The second positioning groove (33) is axially spaced at the front end of the first positioning groove (32). The button (50) is telescopically mounted on the drive member (10). An elastic member (60) is abutted between the button (50) and the drive member (10). When it is necessary to switch from utility knife posture to scraper posture, the button (50) needs to be pressed down first to release the positioning part (31) from the first positioning groove (32), and then the driving part (10) is driven forward by the button (50). The first pin (211) drives the blade assembly (20) to rotate about the second pin (212) as the rotation axis to be orthogonal to the axis direction, and is locked in the second positioning groove (33) by the positioning part (31) so that the blade assembly (20) maintains the scraper posture. When it is necessary to switch from scraper posture to utility knife posture, the button (50) needs to be pressed down first to release the positioning part (31) from the second positioning groove (33). Then, the drive part (10) is driven back by the button (50). The first pin (211) drives the blade assembly (20) to rotate around the second pin (212) as the rotation axis to a direction parallel to the axis. The positioning part (31) locks the blade assembly (20) in the first positioning groove (32) so that the blade assembly (20) maintains the utility knife posture.

2. The blade turning structure of a folding knife according to claim 1, characterized in that: The drive unit (10) is provided with a slide groove (12) arranged along the axial direction, and the inner wall of the blade shell (40) is provided with a fixing post (41) extending into the slide groove (12), and the width of the fixing post (41) is adapted to the slide groove (12).

3. The blade turning structure of a folding knife according to claim 2, characterized in that: Two fixed columns (41) are provided and are axially spaced on the inner wall of the blade housing (40).

4. The blade turning structure of a folding knife according to claim 1, characterized in that: The drive groove (11) is a strip groove arranged laterally at the front end of the drive member (10), and the width of the strip groove is adapted to the first pin (211).

5. The blade turning structure of a folding knife according to claim 4, characterized in that: The length of the drive groove (11) is equal to or equal to the distance by which the first pin (211) rotates 90° around the second pin (212).

6. The blade turning structure of a folding knife according to claim 1, characterized in that: The blade housing (40) is provided with a front limiting part (42) and a rear limiting part (43). When the button (50) abuts against the front limiting part (42), the button (50) and the driving member (10) are restricted from continuing to move forward. When the button (50) abuts against the rear limiting part (43), the button (50) and the driving member (10) are restricted from continuing to move backward.

7. The blade turning structure of a folding knife according to claim 6, characterized in that: When the button (50) abuts against the front limit part (42), the second positioning groove (33) is located directly above the positioning part (31). At this time, the force of pressing down on the button (50) is released, and the positioning part (31) abuts into the second positioning groove (33) under the elastic force of the elastic member (60) and is positioned and engaged with the second positioning groove (33). When the button (50) abuts against the rear limit part (43), the first positioning groove (32) is located directly above the positioning part (31). At this time, the force of pressing down on the button (50) is released, and the positioning part (31) abuts into the first positioning groove (32) under the elastic force of the elastic member (60) and is positioned and engaged with the first positioning groove (32).

8. The blade turning structure of a folding knife according to claim 1, characterized in that: The positioning parts (31) are symmetrically arranged on both sides of the button (50), and the blade shell (40) is provided with a first positioning groove (32) and a second positioning groove (33) corresponding to the positioning parts (31) on both sides.

9. The blade turning structure of a folding knife according to claim 1, characterized in that: The drive unit (10) has a slot at its rear end, and the button (50) has a plug part (52) that is adapted to the slot. The plug part (52) is inserted into the slot and can extend and retract along the slot in the height direction.

10. A blade turning structure for a folding knife according to any one of claims 1-9, characterized in that: The blade housing (40) is provided with at least one third positioning groove (34) at the position between the first positioning groove (32) and the second positioning groove (33). When the button (50) is moved to the position of the positioning part (31) corresponding to the third positioning groove (34) and the button (50) is released, the drive member (10) is locked in the current position and the blade assembly (20) is kept at the current angle.

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