Safety assembly for cutter and cutter thereof

Abstract

The safety assembly comprises a safety push button, the safety push button is arranged on one side of a cutter shell in a longitudinal moving mode, when the safety push button is located at a closing position, a cutter holder is prevented from rotating out of the cutter shell, and a clamping groove is formed in the safety push button; the clamping part is elastically and rotatably connected to the inner surface of the knife shell, the clamping part is suitable for being detachably jointed with the clamping groove, and when the clamping part is jointed with the clamping groove, the safety push button is kept at the opening position, and the knife holder can be rotated out of the knife shell; and the reset piece is elastically connected with the safety push button and the knife shell so as to provide acting force towards the front end of the knife shell for the safety push button, so that the safety push button is reset to a closing position to prevent the knife holder from rotating out of the knife shell, or the front end of the safety push button is propped against the knife holder to avoid the blade so as to enable the knife holder to rotate. And the use safety of the cutter is improved.

Description

Technical Field

[0001] The invention relates to the technical field of cutters, in particular to a safety component for cutters and the cutter. Background Art

[0002] Knives are mainly divided into cutting knives for side cutting and scrapers for scraping. A cutting knife is a tool for arts and crafts, mostly of a pull-out structure, consisting of a plastic handle and a blade. Usually the cutting edge of the blade is parallel to the axis of the handle or the shell, and is mainly used for cutting, such as cutting paper, cardboard, etc. A scraper usually has a blade that is perpendicular or orthogonal to the axis of the handle, and is used for scraping, such as scraping paint, glue marks, etc. from a flat surface. A cutting knife and a scraper are two separate hand tools, and they are often not interchangeable. It is usually necessary to purchase, store and carry these two separate tools, which brings inconvenience to the user.

[0003] The deformable tool drives the tool holder to rotate through a driving part, so that it can switch between multiple positions such as a cutting knife, a scraper, and even an oblique scraper. A deformable tool can meet multiple work needs such as cutting and scraping, and the multi-angle positioning of the tool can be quickly achieved with only one hand operation, which is conducive to improving work efficiency. Therefore, the demand and development of deformable tools are increasing.

[0004] The drive member of the existing deformable tool is pivotally connected to the tool holder. The tool holder is driven by the drive member to translate and / or rotate relative to the tool housing, and the tool holder and the drive member rotate relative to each other. However, when the tool is used as a cutting tool, if the drive member drives the tool holder to rotate due to accidental touch, and then the blade rotates out of the tool housing, it will be detrimental to the cutting operation and may even cause a safety accident. Summary of the invention

[0005] One object of the present invention is to provide a safety assembly for a knife, which is arranged on the side of a knife housing and below a knife seat, so as to stop the knife seat from rotating out of the knife housing, further prevent the blade from rotating out of the knife housing, and improve the safety of the knife.

[0006] Another object of the present invention is to provide a safety assembly for a knife, which can keep the safety push button in the open position through the cooperation of the locking member and the locking groove, so as to facilitate the knife holder to be rotated out of the knife housing.

[0007] Another object of the present invention is to provide a safety assembly for a knife, which can use a reset member to make the safety push button abut against the knife seat, preventing the safety push button from returning to the closed position, so that the knife seat can rotate smoothly; and when the knife seat is rotated back to the knife housing, the reset member can automatically reset the safety push button to stop the knife seat from rotating.

[0008] Another object of the present invention is to provide a knife that can retain the knife holder in the knife housing through a safety assembly to prevent the knife holder from accidentally rotating and causing safety accidents.

[0009] To achieve at least one of the above purposes, the technical solution adopted by the present invention is: a safety assembly for a knife, comprising: a safety push button, which can be longitudinally movably arranged on one side of a knife housing, so that when the safety push button is in the closed position, the knife holder can be stopped from rotating out of the knife housing, and a locking groove is provided on the safety push button; a locking piece, which can be elastically rotatably connected to the inner surface of the knife housing, the locking piece is suitable for being detachably engaged with the locking groove, and when the locking piece is engaged with the locking groove, the safety push button is kept in the open position, and the knife holder can be rotated out of the knife housing; a reset piece, which is elastically connected to the safety push button and the knife housing, so as to provide a force toward the front end of the knife housing to the safety push button, so that the safety push button is reset to the closed position to stop the knife holder from rotating out of the knife housing, or so that the front end of the safety push button is against the knife holder to avoid the blade and allow the knife holder to rotate.

[0010] As a preference, the safety push button includes a base extending longitudinally along the axial direction of the knife housing, the base can be longitudinally movably arranged in the knife housing, when the knife seat rotates, the front end of the base abuts against the knife seat under the action of the reset member, the locking groove is opened on the upper side of the base, the locking member can be elastically rotatably located above the base, when one end of the locking member engages with the locking groove, the other end of the locking member abuts against the driving member, when the driving member moves to drive the knife seat to rotate, the locking member rotates under the drive of the driving member to separate from the locking groove.

[0011] As a preference, the safety push button also includes a stop portion, which extends laterally from the rear end of the base to below the blade. When the safety push button is in the closed position, the stop portion is located below the rear end of the blade to stop the blade from rotating out of the blade housing.

[0012] Preferably, the safety push button also includes a bending portion, which extends integrally from the side of the base toward the outside of the knife housing so as to be exposed on the outside of the knife housing, and a sliding groove is formed between the bending portion and the base so that at least part of the knife housing is accommodated in the sliding groove.

[0013] As a preference, the safety assembly further comprises a guide member fixed to the blade housing, the guide member extending longitudinally along the axial direction of the blade housing, and the safety push button further comprises a guide groove, the guide groove being provided at the base and being suitable for cooperating with the guide member to enable the safety push button to move longitudinally.

[0014] As a preference, the reset member is a compression spring, which is accommodated in the guide groove and extends longitudinally, and elastically abuts between the safety push button and the knife housing, so as to provide a force to the safety push button toward the front end of the knife housing.

[0015] As a preference, the safety push button is further provided with a long card slot, and the long card slot and the locking slot are arranged at intervals on the upper side of the base, and the locking member is suitable for slidably abutting against the wall of the long card slot, or being locked in the locking slot.

[0016] As a preference, the front end of the safety push button is provided with an arc surface, which is suitable for relatively sliding against the knife seat, and the end of the locking member facing the driving member is provided with an arc surface, which is suitable for relatively sliding against the driving member.

[0017] As a preferred embodiment, the locking member can be elastically rotatably connected to the knife housing via a torsion spring, and abuts against the safety push button.

[0018] In order to achieve at least one of the above purposes, the technical solution adopted by the present invention is: a tool, comprising: a knife housing, the knife housing is provided with a accommodating cavity and a port, the port is opened at the front end of the knife housing; a knife seat, the knife seat carries a blade, and the knife seat is rotatably installed in the accommodating cavity; a driving member, the driving member is drivably connected to the knife seat so that the knife seat can be rotated out of or into the accommodating cavity; and the above-mentioned safety component for the knife, the safety component is installed on the knife housing to stop the knife seat from rotating out of the accommodating cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a safety component disposed on a knife housing according to some embodiments of the present application;

[0020] Figure 2 It is a partial exploded view of a safety component disposed on a knife housing according to some embodiments of the present application;

[0021] Figure 3 is a schematic structural diagram of a safety push button according to some embodiments of the present application;

[0022] Figure 4 is a cross-sectional view of a safety assembly disposed on a knife housing according to some embodiments of the present application;

[0023] Figure 5 is a schematic structural diagram of a tool according to some embodiments of the present application;

[0024] Figure 6 is a schematic structural diagram of a tool according to some embodiments of the present application;

[0025] Figure 7is a partial exploded view of a knife housing in which a safety assembly is disposed according to some embodiments of the present application;

[0026] Figure 8 A schematic diagram of a deformable tool in a longitudinal position according to some embodiments of the present application;

[0027] Fig. 9 A schematic diagram of a deformable tool in a longitudinal position ready to rotate according to some embodiments of the present application;

[0028] Fig.10 A schematic diagram of a deformable tool in a transition position according to some embodiments of the present application;

[0029] Fig.11 Schematic diagram of a deformable knife in a lateral position according to some embodiments of the present application.

[0030] In the figure: 10, safety assembly; 11, safety push button; 111, base; 112, positioning groove; 113, guide groove; 114, bending portion; 115, stop portion; 116, sliding groove; 117, long positioning groove; 12, reset member; 131, positioning member; 132, torsion spring; 14, guide member; 20, knife shell; 21, upper shell; 211, positioning groove; 2111, moving area; 2112, positioning area; 212, first guide rail; 22, lower shell; 221, second guide rail; 23, accommodating chamber; 24, port; 30, driving member; 31, positioning portion; 40, knife seat; 41, first guide member; 43, blade; 42, second guide member; 50, sliding assembly; 51, sliding bracket; 511, matching portion; 52, sliding spring. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0032] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present invention.

[0033] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0034] It should be noted that the terms "front", "back", etc. are used to indicate the orientation to facilitate the description of the present invention and simplify the description, rather than to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. It can also be expressed as "above", "below", or "one side", "the other side", etc., and cannot be understood as limiting the specific scope of protection of the present invention.

[0035] A safety assembly 10 for a tool, such as Figure 1-Figure 4 As shown, it comprises: a safety push button 11, a locking member 131 and a reset member 12. The safety push button 11 is longitudinally movably arranged on one side of the knife housing 20. When the safety push button 11 is in the closed position, it can stop the knife holder 40 from rotating out of the knife housing 20. A locking groove 112 is provided on the safety push button 11. The locking member 131 is elastically rotatably connected to the inner surface of the knife housing 20 and is suitable for being detachably engaged with the locking groove 112. When the locking member 131 is engaged with the locking groove 112, the safety push button 11 is kept in the open position, and the knife holder 40 can be rotated out of the knife housing 20. The reset member 12 is elastically connected to the safety push button 11 and the blade housing 20, so as to provide a force to the safety push button 11 toward the front end of the blade housing 20, so that the safety push button 11 is reset to the closed position to stop the blade holder 40 from rotating out of the blade housing 20, or so that the front end of the safety push button 11 abuts against the blade holder 40 to avoid the blade 43 and allow the blade holder 40 to rotate.

[0036] Specifically, when the knife holder 40 is in the longitudinal position, as shown in FIG. Figure 8 As shown, that is, when the blade edge of the blade 43 is parallel to the axis of the blade housing 20 and is used as a cutting knife, the retaining member 131 is separated from the retaining groove 112, and the safety push button 11 is kept in the closed position under the action of the reset member 12, so as to stop the blade holder 40 from driving the blade 43 out of the blade housing 20. When the blade holder 40 needs to be rotated out of the blade housing 20 so that the blade edge of the blade 43 is set at an angle to the axis of the blade housing 20 and is used as an oblique scraper or a scraper, the safety push button 11 is first pushed so that the retaining member 131 is engaged with the retaining groove 112, so that the safety push button 11 is kept in the open position, as shown in FIG. Fig. 9 As shown, the blade is avoided, so that the knife seat 40 can drive the blade 43 to rotate out of the knife housing 20. During the rotation of the knife seat 40, the reset member 12 makes the front end of the safety push button 11 abut against the knife seat 40. At the same time, due to the blocking of the safety push button 11 by the knife seat 40, it is possible to avoid the safety push button 11 returning to the closed position and interfering with the rotation of the blade 43. When the knife seat 40 fully returns to the longitudinal position, the front end of the safety push button 11 is separated from the knife seat 40, and the safety push button 11 is returned to the closed position under the action of the reset member 12.

[0037] In some embodiments, Figure 2-Figure 4 As shown, the safety push button 11 includes a base 111 extending longitudinally along the axis direction of the knife housing 20. The base 111 is longitudinally movably arranged in the knife housing 20. When the knife seat 40 rotates, the front end of the base 111 abuts against the knife seat 40 under the action of the reset member 12. The locking groove 112 is provided on the upper side of the base 111. The locking member 131 is elastically rotatably located above the base 111. When one end of the locking member 131 is engaged with the locking groove 112, the other end of the locking member 131 abuts against the driving member 30. When the driving member 30 moves to drive the knife seat 40 to rotate, the locking member 131 is driven by the driving member 30 to rotate and separate from the locking groove 112.

[0038] Specifically, Fig. 9 As shown, when the knife holder 40 needs to be rotated, the safety push button 11 is first pushed so that the end of the locking member 131 facing the base 111 engages with the locking groove 112, thereby overcoming the restoring force of the reset member 12, so that the safety push button 11 remains in the open position. At this time, the other end of the locking member 131 abuts against the driving member 30. When the driving member 30 translates and / or rotates to drive the knife holder 40 to rotate, the driving member 30 can push the locking member 131 to rotate, so that the locking member 131 is separated from the locking groove 112. Further, under the action of the reset member 12, the safety push button 11 moves toward the closed position. Fig.10 and Fig.11 As shown, because the front end of the base 111 abuts against the knife seat 40, the knife seat 40 is able to block the safety push button 11 from returning to the closed position. It is understandable that when the knife seat 40 rotates, the safety push button 11 moves longitudinally along the knife housing 20 with the rotation of the knife seat 40.

[0039] Further, such as Figure 8 As shown, when the knife holder 40 returns to the longitudinal position, the front end of the base 111 is separated from the knife holder 40, and the safety push button 11 is further returned to the closed position under the action of the reset member 12, so as to stop the knife holder 40 from driving the blade 43 to rotate out of the knife housing 20. In other words, when the knife holder 40 returns to the longitudinal position, the safety push button 11 is automatically reset without manually moving it to the closed position, which is convenient for operation and avoids forgetting to push the reset member 12 to the closed position to cause safety hazards.

[0040] Furthermore, if Figure 1-Figure 3As shown, the front end of the safety push button 11 is provided with an arc surface, which is suitable for relatively sliding against the knife seat 40. In other words, the corner of the front end of the base 111 suitable for abutting against the knife seat 40 is provided with an arc surface, so as to reduce the friction force when the safety push button 11 slides relative to the knife seat 40. The end of the locking member 131 facing the driving member 30 is provided with an arc surface, which is suitable for relatively sliding against the driving member 30, so as to avoid the locking member 131 and the driving member 30 from being stuck relative to each other.

[0041] In some embodiments, Figure 3 and Figure 4 As shown, the safety push button 11 also includes a stop portion 115, which extends laterally from the rear end of the base 111 to the bottom of the blade 43. When the safety push button 11 is in the closed position, the stop portion 115 is located below the rear end of the blade 43 to stop the blade 43 from rotating out of the blade housing 20.

[0042] It is understandable that when the blade holder 40 drives the blade 43 to rotate out of the blade housing 20, the rear end of the blade 43 rotates downward, and the stopper 115 is located below the rear end of the blade 43, thereby playing a role in stopping the rotation of the blade 43. In other words, the stopper 115 is only arranged below the rear end of the blade 43 to play a role in stopping the rotation of the blade 43, and does not need to be arranged below the entire blade, which is conducive to reducing the volume of the safety push button 11, making the structure of the safety assembly 10 more compact, and reducing the space occupied in the blade housing 20.

[0043] Furthermore, when the blade holder 40 needs to be rotated, the minimum distance that the safety push button 11 needs to move is: the overlapping length of the stop portion 115 and the blade 43 when the safety push button 11 is in the closed position. Compared with setting the stop portion 115 below the entire blade, in this embodiment, the stop portion 115 is set below the rear end of the blade 43, which can effectively stop the rotation of the blade 43 and reduce the moving distance of the safety push button 11 between the closed position and the open position, which is beneficial to reducing the active space occupied by the safety component 10 in the blade housing 20.

[0044] In some embodiments, Figure 1 As shown, the safety assembly 10 further includes a guide member 14 fixed to the knife housing 20, the guide member 14 extends longitudinally along the axis direction of the knife housing 20, and the safety push button 11 further includes a guide groove 113, the guide groove 113 is provided in the base 111, and is suitable for cooperating with the guide member 14 to make the safety push button 11 move longitudinally. In other words, the safety push button 11 cooperates with the guide member 14 through the guide groove 113, so as to be connected to the knife housing 20 in a longitudinally movable manner.

[0045] In an optional embodiment, the guide member 14 is cantileveredly connected to the blade housing 20, and the guide groove 113 is formed on the rear end surface of the base 111, so that the base 111 is sleeved on the outer periphery of the guide member 14 to move longitudinally along the guide member 14. It is understood that the matching length of the guide member 14 and the guide groove 113 is greater than the moving distance of the safety push button 11 between the open position and the closed position, so as to avoid the safety push button 11 from separating from the guide member 14. Preferably, the guide member 14 is made of metal to improve the strength of the guide member 14 and avoid the guide member 14 bending and causing the safety push button 11 to be unable to move smoothly.

[0046] It is understandable that the guide member 14 can also be fixedly connected to the blade housing 20 at both ends, and a longitudinally penetrating guide hole is opened in the base 111, so that the safety push button 11 is connected to the guide member 14 through the guide hole.

[0047] Further, such as Figure 2 and Figure 4 As shown, the reset member 12 is a compression spring, which is accommodated in the guide groove 113 and elastically abuts between the safety push button 11 and the knife housing 20, so as to provide a force for the safety push button 11 toward the front end of the knife housing 20. That is, when the safety push button 11 moves from the closed position to the open position, the compression spring is compressed, and at the same time, due to the combination of the locking member 131 and the locking groove 112, the safety push button 11 is kept in the open position. When the driving member 30 translates and / or rotates to drive the knife seat 40 to rotate, the locking member 131 is separated from the locking groove 112 under the action of the driving member 30, and the compression spring is stretched to push the safety push button 11 to move to the closed position. However, since the front end of the base 111 of the safety push button 11 is against the knife seat 40, the safety push button 11 cannot be completely restored to the closed position, and as the knife seat 40 rotates, the knife seat 40 is able to overcome the elastic force of the compression spring, so that the safety push button 11 moves between the open position and the closed position, until the knife seat 40 rotates back to the longitudinal position, the front end of the base 111 is separated from the knife seat 40, and the compression spring is stretched to restore the safety push button 11 to the closed position.

[0048] In a specific embodiment, the compression spring is sleeved on the outer periphery of the guide member 14, one end of the compression spring abuts against the wall surface at the front end of the guide groove 113, that is, against the base 111, and the other end of the compression spring abuts against the knife housing 20. It can be understood that, through the support of the guide member 14, the compression spring can be kept longitudinally compressed or stretched along the axial direction, avoiding the compression spring bending and blocking the guide groove 113 so that the base 111 cannot move smoothly along the guide member 14, which is conducive to ensuring the reliability of the longitudinal movement of the safety assembly 10.

[0049] In another specific embodiment, the compression spring is accommodated in the guide groove 113 and extends longitudinally along the axial direction of the blade housing 20. One end of the compression spring abuts against the wall surface at the front end of the guide groove 113, that is, against the base 111, and the other end of the compression spring abuts against the front end surface of the guide member 14, so as to prevent the compression spring from being exposed from the guide groove 113.

[0050] In some embodiments, Figure 3 and Figure 4 As shown, the safety push button 11 also includes a bending portion 114, which extends integrally from the side of the base 111 to the outside of the knife housing 20 so as to be exposed on the outside of the knife housing 20. A sliding groove 116 is formed between the bending portion 114 and the base 111, so that at least part of the knife housing 20 is accommodated in the sliding groove 116.

[0051] That is, the base 111 is accommodated in the knife housing 20 so as to be longitudinally movable, and the bent portion 114 extends from the side edge of the base 111 along the lower surface of the knife housing 20 to the outside of the knife housing 20 in a bent manner. Preferably, the bent portion 114 extends to the positive side of the knife housing 20, so that the base 111 can be moved in the knife housing 20 by pushing the bent portion 114, so that the safety push button 11 moves from the closed position to the open position. It is worth mentioning that the bent portion 114 extends to the outside of the knife housing 20, so as to play an indicating role, so that it is convenient to observe whether the safety push button 11 is in the open position or the closed position through the bent portion 114.

[0052] Furthermore, if Figure 3 and Figure 4 As shown, a sliding groove 116 is formed between the bending portion 114 and the base 111 to accommodate part of the knife housing 20. That is to say, part of the side edge of the knife housing 20 is connected to the safety push button 11 through the sliding groove 116, and the safety push button 11 is suitable for longitudinal movement along the side edge of the knife housing 20, thereby increasing the connection strength and connection reliability of the safety push button 11 and the knife housing 20.

[0053] In some embodiments, Figure 8-Figure 11As shown, the locking member 131 is elastically rotatably connected to the knife housing 20 through the torsion spring 132, and abuts against the safety push button 11. Specifically, the torsion spring 132 allows one end of the locking member 131 to always abut against the safety push button 11. When the safety push button 11 is in the open position, the torsion spring 132 causes the locking member 131 to fall into the locking groove 112, so that it can be combined with the locking groove 112. At the same time, the other end of the locking member 131 abuts against the driving member 30. When the driving member 30 translates and / or rotates, it can provide the locking member 131 with a force opposite to the torsion spring 132, so that the locking member 131 rotates in the opposite direction and disengages from the locking groove 112, and the safety push button 11 can move to the closed position under the action of the reset member 12. When the driving member 30 continues to translate and / or rotate, so that the driving member 30 is separated from the locking member 131, the locking member 131 rotates under the action of the torsion spring 132 and abuts against the safety push button 11 again, so as to be combined with the locking groove 112 next time.

[0054] In some embodiments, Figure 1 and Figure 3 As shown, the safety push button 11 is further provided with a long card slot 117, and the long card slot 117 and the card slot 112 are arranged at intervals on the upper side of the base 111, and the card slot 131 is suitable for slidably abutting against the wall of the long card slot 117, or being engaged with the card slot 112. It can be understood that the long card slot 117 and the card slot 112 are arranged at intervals, and a raised block is arranged between the long card slot 117 and the card slot 112, so as to prevent the card slot 131 from accidentally falling into the card slot 112 when the knife seat 40 rotates, so as to prevent the safety push button 11 from being automatically reset.

[0055] A tool such as Figure 5-Figure 11 As shown, it includes: a knife housing 20, the knife housing 20 is provided with a accommodating cavity 23 and a port 24, and the port 24 is opened at the front end of the knife housing 20; a knife seat 40, the knife seat 40 carries a blade 43, and the knife seat 40 is rotatably installed in the accommodating cavity 23; a driving member 30, the driving member 30 is drivably connected to the knife seat 40, so that the knife seat 40 is rotated out of or into the accommodating cavity 23; and the above-mentioned safety component 10 for the knife, the safety component 10 is installed in the knife housing 20, so as to stop the knife seat 40 from rotating out of the accommodating cavity 23.

[0056] In a specific embodiment, Figure 2 and Figure 7As shown, the knife housing 20 includes an upper shell 21 and a lower shell 22, and the driving member 30 is accommodated in the accommodating cavity 23 between the upper shell 21 and the lower shell 22, and is located between the upper shell 21 and the knife seat 40. The upper shell 21 is provided with a first guide rail 212 and a positioning groove 211. The first guide rail 212 is formed on the inner surface of the upper shell 21, and is pivotally connected to the first guide member 41 on the knife seat 40. The positioning groove 211 is opened on the surface of the upper shell 21 and extends along the axial direction. The driving member 30 can be elastically locked in the positioning groove 211, so that the blade 43 of the knife seat 40 is locked in the longitudinal position, the transverse position or the transition position between the longitudinal position and the transverse position, for example, at 30°, 45°, or 60° with the axis. The second guide rail 221 is opened on the surface of the lower shell 22, and is pivotally connected to the second guide member 42 on the knife seat 40. That is to say, the knife seat 40 is movably connected to the upper shell 21 and the lower shell 22 through the first guide member 41 and the second guide member 42.

[0057] The lower end of the sliding assembly 50 passes through the positioning slot 211 and is pivotally connected to the driving member 30, and the sliding assembly 50 is suitable for moving along the positioning slot 211, and further by pushing the sliding assembly 50, the driving member 30 is driven to drive the knife holder 40 to translate and / or rotate. Specifically, the sliding assembly 50 includes a sliding bracket 51 and a sliding spring 52, the sliding bracket 51 passes through the positioning slot 211 and is pivotally connected to the rear end of the driving member 30, the sliding spring 52 is connected to the sliding bracket 51, and abuts between the driving member 30 and the lower shell 22, and the driving member 30 can be movably locked in the positioning slot 211 by pressing the sliding bracket 51.

[0058] Further, such as Figure 7-Figure 11 As shown, the positioning groove 211 includes an elongated moving area 2111 extending longitudinally along the axial direction and a plurality of positioning areas 2112 distributed at intervals. The sliding bracket 51 is provided with an elongated matching portion 511 on the side facing the driving member 30. The matching portion 511 is suitable for moving along the moving area 2111 of the positioning groove 211. The driving member 30 is protrudingly provided with a positioning portion 31 on the side facing the positioning groove 211. The positioning portion 31 is suitable for matching with the positioning area 2112 to lock the driving member 30 so that the tool holder 40 is maintained in an optional position.

[0059] Specifically, if Figure 8As shown, the positioning portion 31 of the driving member 30 is located in the positioning area 2112 on the right side of the positioning groove 211 of the upper shell 21, and the driving member 30 is located at the rightmost side. It can be understood that the sliding assembly 50 is also located at the rightmost side, the first guide member 41 of the knife seat 40 is connected to the front end of the driving member 30, and the first guide member 41 of the knife seat 40 is located at the end of the upper right side of the first guide rail 212, and the second guide member 42 of the knife seat 40 is located at the end of the lower right side of the second guide rail 221. The knife seat 40 is located in a longitudinal position, so that the blade 43 is parallel to the axis, so that it can be used as a cutting knife. At this time, the safety push button 11 is located at the leftmost closed position, one end of the locking member 131 is against the driving member 30, and the other end of the locking member 131 is against the safety push button 11, and the contact point is located on the right side of the long slot 117, and the stopper 115 is located below the blade 43 to stop the blade 43 from rotating.

[0060] like Fig. 9 As shown, the safety push button 11 is moved to the right to the open position. At this time, one end of the locking member 131 abuts against the driving member 30, and the other end of the locking member 131 abuts against the safety push button 11, and is engaged with the locking groove 112, so that the stopper 115 deviates from the blade 43, avoiding interference with the blade 43 when the subsequent knife seat 40 drives the blade 43 to change direction and rotate.

[0061] like Fig.10 As shown, the sliding assembly 50 is pressed, so that the positioning portion 31 of the driving member 30 is separated from the positioning area 2112 of the positioning groove 211 of the upper shell 21, and the matching portion 511 of the sliding bracket 51 cooperates with the moving area 2111, so that the sliding assembly 50 can drive the driving member 30 to translate and / or rotate, and further make the first guide member 41 of the knife seat 40 turn and move along the first guide rail 212, and the second guide member 42 of the knife seat 40 turn and move along the second guide rail 221, so that the first guide member 41 moves To the middle area of ​​the first guide rail 212, the second guide member 42 moves to the middle area of ​​the second guide rail 221; the sliding assembly 50 is released, and the sliding spring 52 causes the sliding bracket 51 and the driving member 30 to move outward, and the positioning portion 31 of the driving member 30 cooperates with the positioning area 2112 in the middle of the sliding groove 116 of the upper shell 21, locking the knife seat 40 in the transition position, and the blade 43 is completely exposed from the knife housing 20, and forms an angle of 45° with the knife housing 20, so that it can be used as an oblique scraper.

[0062] It is understandable that when the driving member 30 moves and / or rotates, the blocking member 131 moves in a Fig.10By rotating counterclockwise in the direction shown, it is separated from the locking groove 112, and the force of the safety spring further causes the safety push button 11 to move forward, and the front end of the base 111 of the safety push button 11 abuts against the knife seat 40, so as to avoid the safety push button 11 from being completely reset to the closed position. At this time, the stopper 115 is still deviated from the blade 43, so as to avoid interference with the blade 43, thereby ensuring that the knife seat 40 can drive the blade 43 to change direction and rotate smoothly.

[0063] like Fig.11 As shown, the sliding assembly 50 is pressed, so that the positioning portion 31 of the driving member 30 is separated from the positioning area 2112 of the positioning groove 211 of the upper shell 21, and the matching portion 511 of the sliding bracket 51 cooperates with the moving area 2111, so that the sliding assembly 50 can drive the driving member 30 to translate and / or rotate, and further make the first guide member 41 of the knife seat 40 turn and move along the first guide rail 212, and the second guide member 42 of the knife seat 40 turn and move along the second guide rail 221, so that the first guide member 41 moves to the second guide rail 221. At the end of the lower left side of a guide rail 212, the second guide member 42 moves to the end of the upper left side of the second guide rail 221; the sliding assembly 50 is loosened, and the sliding spring 52 causes the sliding bracket 51 and the driving member 30 to move outward, and the positioning portion 31 of the driving member 30 cooperates with the positioning area 2112 on the left side of the sliding groove 116 of the upper shell 21, locking the knife seat 40 in a horizontal position, and the blade 43 is completely exposed from the knife housing 20, and forms a 90° angle with the knife housing 20, so that it can be used as a horizontal scraper.

[0064] It can be understood that when the driving member 30 translates and / or rotates, the force of the safety spring causes the safety push button 11 to move forward, the front end of the base 111 of the safety push button 11 abuts against the knife seat 40, and the locking member 131 is moved in a forward direction under the action of the locking spring. Fig.11 Rotating clockwise in the direction shown, one end of the locking member 131 abuts against the driving member 30, and the other end abuts against the safety push button 11, and the contact point moves to the right along the long slot 117, and the stopper 115 is still deviated from the blade 43 to avoid interference with the blade 43, so that the blade holder 40 drives the blade 43 to change direction and rotate smoothly.

[0065] Furthermore, when the sliding assembly 50 is pressed to move to the right, the knife seat 40 is able to rotate from the horizontal position to the longitudinal position via the transition position, and the knife seat 40 abuts against the front end of the base 111 of the safety push button 11. The rotation of the knife seat 40 allows the safety push button 11 to overcome the resistance of the safety spring and move to the right, thereby preventing the stopper 115 from interfering with the blade 43 and hindering the knife seat 40 from changing direction and rotating. At this time, the contact point between the locking member 131 and the safety push button 11 moves to the left along the long slot 117. When the knife seat 40 is close to the longitudinal position, the knife seat 40 is separated from the safety push button 11, and the force of the safety spring causes the safety push button 11 to move forward and reset. The contact point between the locking member 131 and the safety push button 11 is located at the rightmost side of the long slot 117, and the stopper 115 is located below the blade 43, thereby stopping the blade 43 from rotating.

[0066] The above describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention to be protected. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A safety assembly for a tool, characterized in that: include: A safety push button, which is longitudinally movably arranged on one side of the knife housing, and when the safety push button is in the closed position, it can stop the knife holder from rotating out of the knife housing, and a locking groove is provided on the safety push button; A locking member is elastically and rotatably connected to the inner surface of the knife housing, and the locking member is adapted to be detachably engaged with the locking groove. When the locking member is engaged with the locking groove, the safety push button is kept in the open position, and the knife holder can be rotated out of the knife housing; A reset member elastically connects the safety push button and the knife housing, and can provide a force to the safety push button toward the front end of the knife housing, so that the safety push button is reset to a closed position to stop the knife seat from rotating out of the knife housing, or the front end of the safety push button is against the knife seat to avoid the blade and allow the knife seat to rotate.

2. The safety assembly for a tool according to claim 1, characterized in that: The safety push button includes a base extending longitudinally along the axial direction of the knife housing, and the base can be longitudinally movably arranged in the knife housing. When the knife seat rotates, the front end of the base abuts against the knife seat under the action of the reset member, and the locking groove is opened on the upper side of the base. The locking member can be elastically rotatably located above the base. When one end of the locking member is engaged with the locking groove, the other end of the locking member abuts against the driving member. When the driving member moves to drive the knife seat to rotate, the locking member rotates under the drive of the driving member to separate from the locking groove.

3. The safety assembly for a tool according to claim 2, characterized in that: The safety push button also includes a stop portion, which extends laterally from the rear end of the base to the bottom of the blade. When the safety push button is in the closed position, the stop portion is located below the rear end of the blade to stop the blade from rotating out of the blade housing.

4. The safety assembly for a tool according to claim 2, characterized in that: The safety push button also includes a bending portion, which is integrally extended from the side of the base to the outside of the knife housing so as to be exposed on the outside of the knife housing. A sliding groove is formed between the bending portion and the base so that at least part of the knife housing is accommodated in the sliding groove.

5. The safety assembly for a tool according to claim 2, characterized in that: It also includes a guide member fixed to the knife housing, the guide member extends longitudinally along the axial direction of the knife housing, and the safety push button also includes a guide groove, the guide groove is opened in the base, and is suitable for cooperating with the guide member to enable the safety push button to move longitudinally.

6. The safety assembly for a tool according to claim 5, characterized in that: The reset member is a compression spring, which is accommodated in the guide groove and extends longitudinally, and elastically abuts between the safety push button and the knife housing, so as to provide a force acting on the safety push button toward the front end of the knife housing.

7. The safety assembly for a tool according to any one of claims 2 to 6, characterized in that: The safety push button is also provided with a long card slot, and the long card slot and the locking slot are arranged at intervals on the upper side of the base, and the locking member is suitable for slidably abutting against the wall of the long card slot, or being locked in the locking slot.

8. The safety assembly for a tool according to any one of claims 2 to 6, characterized in that: The front end of the safety push button is provided with an arc surface, which is suitable for relatively sliding against the knife seat, and the end of the positioning member facing the driving member is provided with an arc surface, which is suitable for relatively sliding against the driving member.

9. The safety assembly for a tool according to any one of claims 1 to 6, characterized in that: The blocking piece is elastically rotatably connected to the knife housing through a torsion spring and abuts against the safety push button.

10. A cutting tool, characterized in that: include: A knife housing, wherein the knife housing is provided with a receiving cavity and a port, and the port is opened at the front end of the knife housing; A knife seat, the knife seat carries a blade, and the knife seat is rotatably mounted in the accommodating cavity; A driving member, the driving member being drivably connected to the knife seat so that the knife seat is rotated out of or into the accommodating cavity; as well as The safety assembly for a cutting tool as described in any one of claims 1 to 9 is installed on the cutting tool housing to prevent the cutting tool holder from rotating out of the accommodating cavity.

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