TWI691265B - Manually operated cutting device - Google Patents

Abstract

The underlying invention in particular is related to manually operated secateurs (1) comprising at least one cutting blade (2, 3) pivotably secured at a pivot joint (6), comprising a locking lever assembly (8) operable to restrict the available opening angle of the cutting blade (2, 3) to an intermediate opening angle (α(i)) lying between the opening angles defined by the fully closed state and fully opened state of the blade (2, 3). The locking lever assembly (8) may comprise a stop pawl (13) that is attached to a manually operable slider (9) associated with a linear slide (10), to be moveable into and out of the intermediate locking position (A) by a movement in lengthwise direction of the cutting device (1).

Description

Manually operated cutting device

The invention relates to a manually operated cutting device, such as a manually operated trimmer.

Trimming machines are known in various structures. In some known trimmer configurations, it is possible to adjust the maximum effective opening angle of these cutting blades, so that, for example, the user can adjust to a certain angle so that the trimmer's operating mode matches the size of the hand, or to At a certain angle, the effective opening angle is matched to the diameter of the cut object.

For example, German Patent No. DE 10 2013 101 008 B3 describes that the opening angle of a cutting blade of a trimmer can be variably adjusted through a threaded connection mechanism. German Patent No. DE 1 180 273 B describes the pivoting assembly of the pruning shears including the handle on the side cheek, operable to limit the effective opening angle of the cutting blade to the middle opening angle, which is between these cutting blades Between fully closed and fully open. British Patent No. GB 2 182 879 describes garden shears, in which the pivoting mechanism is related to the cam and is used to change the position of the stop to limit the maximum effective opening angle. German Patent No. DE 10 2005 052 970 A1 describes a similar mechanism for limiting the maximum opening angle of the scissors.

The known technical solutions still have room for further improvement, especially for simplifying the design and/or improving the feel.

In view of this, the object of the present invention is to provide a manually operated cutting device, especially a pruning machine or pruning shears or garden shears, along with the implementation of other technical solutions, so that the user can adjust the operation mode in a friendly manner. In particular, the effective opening angle of the cutting blade is adjusted friendly, and at the same time, it is a relatively simple and direct mechanical design.

According to the embodiments of the present invention, especially under the technical characteristics of the independent items, this object can be achieved. Further embodiments and/or alternatives are derived from ancillary items, and can also be derived from the description below.

An embodiment of the present invention provides a manually operated cutting device or cutting tool, which can be implemented on, for example, a pruning machine, a pruning shear, or a garden shear.

The characteristics of manual operation can be understood as, for example, by pressing together or releasing the cutting device handle associated with the cutting blade, thereby moving the cutting blade toward and away from each other according to the application action of the hand, allowing the user to manually Operate the cutting blade of the cutting device to perform the cutting action on a branch, branch or the like, for example.

In an embodiment, at least one cutting blade is provided at a pivot joint that is pivotally fixed or assembled to the cutting device. The pivot joint may be, for example, a screw, a bolt, a rivet or the like, which is suitable for sufficiently stabilizing the cutting blades next to each other.

The cutting device may include a locking lever assembly, which can be operated to a first locking position, to limit the effective opening angle of the cutting blade to an intermediate opening angle, which is between the fully closed state and the fully open state of the blade These opening angles are defined.

For example, the first locking position may be expressed as a position for a specific operation or work of the locking lever assembly, and the maximum opening angle of the cutting blade at the foregoing position is limited to the middle opening angle.

For example, the fully closed state may correspond to an operating condition or state of the cutting device whose cutting blades rotate as far as possible toward each other, so that no further movement toward each other is possible.

For example, the fully open state may correspond to an operating condition: pivotal movement through a pivot joint so that the cutting blade or its cutting edge are as far away from each other as possible. That is, no pivoting restriction is imposed on the cutting blade.

In the embodiment proposed in connection with the present invention, the lock lever assembly may include a brake claw, for example, a stopper or stop pointer, beam, protrusion or bracket arm, latch or latch pointer, beam, protrusion Or bracket arm.

The brake claw can be attached to a manually operated slide, which is coupled or combined with a linear slide rail, and moves into and out of the first locked position by a movement in the longitudinal direction of the cutting device.

For example, the linear slide rail may include a linear cut or through opening that runs in the longitudinal direction of the cutting device, for example, corresponding to a handle or a grip when the cutting configuration is in a closed configuration Portrait orientation. The linear slide rail may include linear or linear sliding elements, such as grooves and/or configuration protrusions, to guide the linear movement of the slide member along the linear slide rail by a user's manual operation.

It is possible to provide a cutting device accompanied by such a locking lever assembly and a brake claw, so that it is possible to adjust the effective opening angle of the cutting blade to the desired angle, for example, in a relatively simple way to meet the user's hand size and/or The size or diameter of the object to be cut is especially used with one hand, wherein the object to be cut is, for example, a branch or a branch. In this way, improved operating performance can be obtained. In addition, the locking lever assembly can be implemented on a simpler mechanical design.

In an embodiment, the locking lever assembly may be further implemented or configured to be operable to a second locking position to lock the cutting blade in the closed state and to a third locking position to allow the cutting blade to be in full position Unrestricted rotation between closed and fully open.

In particular, this means that the locking lever assembly can be configured to position: (1) in the second locking position, the operation of the cutting device is blocked, for example, the cutting blade is unusable and locked in the closed state, (2) in the first locking position, cutting The effective pivoting angle range of the blade is limited between the closed state and the middle opening angle, and (3) in the third locked position or in the unlocked operating state, unrestricted rotation of the cutting blade between the closed and fully open states is possible And feasible.

Therefore, the locking lever or slider in these embodiments provides a multi-function operating element that can be operated in a simple manner, for example by hand, for example with one hand like a thumb.

In an embodiment, the sliding member may have an arched cross section, for example, a sliding member from an integral cylindrical vault or vault structure. The slider may be configured to be slidably coupled to an elongated arched groove, such as in such a cylindrical arched structure or design. The arched groove in the embodiment may be implemented on the outer side of the operating arm, such as the outer side of the handle or grip combined with a corresponding cutting blade.

The proposed shape and cross section, especially the design of the cylindrical vault and the cylindrical arch form, are beneficial to the operational operability, slidability and stability.

In an embodiment, the slider may include a locking profile, for example, an index profile. The index profile can be implemented, for example, with grooves and/or protrusions and certain structures or morphologies similar thereto.

An index or locking profile can be implemented and configured to lock the slider at least in the first locking position related to an intermediate locking position. Here, for example, the first locking position is configured as such a locking lever, and in particular, the detent is positioned at a position where the cutting blade or the opening angle is restricted from rotation of the intermediate opening angle.

For example, the index profile in the embodiment may be implemented or provided on at least one of the two lateral arms, for example, the lateral arms in the downward direction protrude from a top of the slider.

In an embodiment, the index structure may include at least one of a second locked position and a third locked position respectively assigned to the fully closed state and the fully open state. In this embodiment, for example, where the slider can be latched or locked in the second locked position, it can be provided and latched or locked in the second locked position, so that the cutting blades are in the closed state. In the third locking position, the slider can be latched or locked at the aforementioned position, and the detent pawl so positioned so as not to hinder the rotation of the cutting blades, that is, these cutting blades are free to operate between the fully closed state and the fully open state.

It may be beneficial to provide respective locking positions for the operation of the cutting device. In particular, the automatic locking at the place where the slider is in the locked position can promote the operation and use of the cutting device. The locking structure may include, for example, a protrusion and a groove-shaped arrangement, for example, the protrusion and the groove corresponding to the protrusion are provided on the sliding member, for example, at least one of the operating arm and the arched groove are slidably received in the installed state Slider under.

In an embodiment, the linear guide may include a linear guide seat, such as a linear protrusion, protrusion, or flange, and the aforementioned guide seat may be implemented on at least one side of the distal end toward the inside of the arm, or on both sides of the distal end Of the lateral arm. The linear guide can be implemented and designed to engage the corresponding guide seat, wherein it can be implemented in an arched groove. Therefore, the configuration of the guide rail structure may provide a configuration for guiding the slider stably within the along and arched grooves. Especially in the embodiment, the linear guide rail and the corresponding linear guide rail are implemented as a guide bar and guide rail structure. Obviously, a linear guide is suitable to provide sufficient guidance of the slider to avoid undesirable interference during operation.

In an embodiment, the locking lever may include at least one cantilever beam, such as a cantilever beam or protrusion. The cantilever beam is oriented parallel to the direction of the opening surface defined by the cutting blade. For example, the opening surface may be a plane parallel to a rotating surface, wherein the rotating surface is the edge of the cutting blade that rotates and moves. For example, the cantilever beam can protrude toward the pivot joint and move toward and away from the pivot joint by operating the slider back and forth, thereby engaging or disengaging a corresponding engagement or locking structure, such as engagement with a cutting blade combination Or lock the structure.

In the embodiment, the cantilever beam may have a locking surface at its free end, for example, the end outside the spaced connection point, which is used to abut on a corresponding locking surface at the mid-angle rotation position of the cutting blade, thereby limiting The rotation angle of the cutting blade to the middle angle.

The locking surface and the corresponding locking surface can be implemented as corresponding surfaces, for example, in a direction perpendicular to the opening surface or the rotating surface of the cutting blade. For example, these surfaces may be provided on respective abutment and corresponding abutment shoulders.

In an embodiment, the respective locking surfaces or abutting shoulders are provided, for example the limitation of the maximum pivot angle to the intermediate angle may obtain an extension of the intermediate angle as soon as these locking surfaces or abutting shoulders are against each other. This principle can also be applied to the lock function in the fully closed state, and can also be applied to multiple first lock positions.

In an embodiment, the locking lever may include a locking surface as one of at least one cantilever beam for locking engagement with a corresponding locking surface, thereby locking the cutting blade in a fully closed state. Therefore, the locking or latching of the cutting blade in the closed state to limit the pivotal movement of the intermediate angle can be based on the same functional principle and can be used to simplify the structure of the overall cutting device.

In an embodiment, at least one of the locking surface, the corresponding locking surface and the corresponding locking surface are inclined in the longitudinal direction relative to the corresponding cantilever beam or the operating arm, so as to generate a self-locking effect between these locking surfaces and the corresponding corresponding locking surface . For example, the respective locking surfaces may only be tilted in such a way that they are partially engaged, generating a driving force to apply or drive the corresponding engaging or locking portion or surface to full engagement.

In an embodiment, the handle or grip combined with the cutting blades can be spring loaded, thus urging the cutting blades to be fully open.

In an embodiment, it is feasible to load the spring in this way, and a corresponding spring force can force these surfaces to abut each other, so that the pawl or slider enters into proper engagement. Therefore, an operation of cutting the device friendly to the user is obtained.

The brake claw and the slider in the embodiment are implemented as separate components fixed to each other. It should be noted that in other embodiments, the brake pawl and the slider may be implemented as an integrated body.

In the embodiment, the brake claw and the slider are implemented as separate components. The brake claw may include a fixed head, for example, a platform, or a rectangular shape.

The fixing head can be configured and arranged for fixing the pawl to the slider. In an embodiment, the implementation of the detent pawl and the fixed head thus protrudes from the opposite side of the groove-shaped guide recess provided on the handle of the cutting device. For example, the groove-shaped guide recess may be provided in the arched groove. Especially at the top end of the arched groove. A neck or the like interconnected with the detent pawl and the fixed head can lead to the groove-shaped guide recess to support the sliding of the lock lever assembly.

The fixed head, especially when implemented as a platform, can provide stability for additional guidance of the slider and thus increase the operability of the brake pawl.

In the embodiment, when the fixing head is implemented as a rectangular form, for example, it may include a sliding profile for sliding engagement with the groove-shaped guide recess, the aforementioned groove is provided or implemented in a handle, such as an arched groove , Where the engagement can be so fixed that the head can be guided to move the groove-shaped guide recess in the longitudinal direction. Such a sliding profile helps to avoid interference of the sliding member during adjustment or setting of the sliding member to one of the dispensing positions or is related to the closed state, the middle opening angle, or the fully opened state.

In an embodiment, the locking lever may have an integral L-shaped configuration, for example, an L-shaped form, cross-section, or structure. The L-shaped configuration may include a rod-shaped neck interconnected with the fixing head, for example, provided at an axial or longitudinal end of the locking rod, accompanied by at least one cantilever beam, for example, provided at other axial or other longitudinal directions of the locking rod end. Embodiments using an L-shaped configuration may be advantageous in which the locking lever provides multiple locking structures such as assigned to a fully closed state, an intermediate opening angle, and a fully open state.

In an embodiment, the at least one cantilever beam is implemented to protrude from the neck of the lock lever toward the pivot joint, for example, in a direction substantially facing the pivot joint. For example, the cantilever beam or the pawl of the lock lever may protrude from the neck in a direction parallel to the movement of the slider, wherein the slider may be configured to slide in a direction of linear motion toward and away from the pivot joint.

In an embodiment, the brake claw and the fixed head protrude from opposite sides of the groove-shaped guide recess provided in the handle of the cutting device, preferably on the top of the arched groove, the configuration of the groove-shaped guide recess makes the brake claw Move in a linear motion towards and away from the pivot joint. In such an embodiment, a corresponding locking element is implemented for engagement with the brake pawl, for example as a tooth, ratchet or frame wheel, which can be designed integrally with the cutting blade.

In an embodiment, at least one first locking position may be related to at least one intermediate locking position, and the effective opening angle of the blade is limited to the intermediate angle of the intermediate locking position. At least one first locking position can be positioned between the second and third locking positions. The second locking position can be located closest to the pivot The position of the joint is related to the fully closed state. The third locking position can be located at the position farthest from the pivot joint and is related to the unlocking position of the cutting blade. The first to third locking positions in the embodiment are set in reverse order.

In an embodiment, the locking lever assembly includes at least one arc-shaped groove, for example, implemented as a tooth segment element or a serrated element. In the case of multiple arc-shaped grooves, an arc-shaped groove structure may be provided with a plurality of separate and combined grooves.

In the embodiment, the arc-shaped groove(s) extends in the circumferential direction relative to the pivot joint, and is parallel to the opening surface or the rotation surface(s) of the cutting blade(s) or the edge(s) of the cutting blade.

For example, the arc-shaped groove is integrally formed with the cutting blade. The arc groove(s) may be defined at least one circumferential end with respect to the pivot joint, a corresponding locking surface, or the circumferential direction of these corresponding locking surfaces, for example, implemented on the corresponding abutting shoulder(s).

The corresponding locking surface in the embodiment is implemented such that it abuts or abuts a locking surface or shoulder of the pawl. In this case, the actual opening angle of the cutting blade corresponds to the middle opening angle or the fully closed state. In an embodiment, the normal vector of the locking surface and the corresponding locking surface may be oriented in a direction parallel to the opening surface or pivoting surface of the cutting blade(s).

The use or provision of an arc-shaped groove, for example in the form of a ring-shaped groove as a corresponding locking or latching element, can make a simpler mechanical design.

In an embodiment, one of the at least one arc-shaped groove may be related to the fully closed state and is defined at the circumferential end of the locking surface for locking engagement with the locking surface of the brake claw in the fully closed state of the cutting blade .

In an embodiment, for example, the maximum opening angle corresponds to a cutting blade with a fully open configuration of approximately 36 degrees, and the intermediate opening angle is approximately 22 degrees.

In an embodiment, the locking lever may be further combined with the handle of the cutting blade as a corresponding cutting blade of the cutting blade. For example, the locking levers can be provided or attached to the lever portions of the respective handles. Therefore, the locking lever can be combined with the handle or lever portion of the corresponding cutting blade, and a corresponding engagement or locking structure is suitable for combination with the locking lever, especially the brake claw, can be provided on the cutting blade, for example, a concave wheel form or the like form.

As can be seen from the above description, the object of the present invention described above can also be obtained from the exemplary embodiments of the present invention described below.

1: pruning machine

2: cutting blade

3: Corresponding cutting blade

4: The first handle

5: Second handle

6: pivot joint

7: Spring

8: Lock lever assembly

9: Slider

10: Arched groove

11: Lateral arm

12: Top part

13: Brake claw

14: fixed head

15: neck

16: Cantilever

17: fastening structure

18: Groove guide recess

19: Locking surface

20: Adjacent shoulder

21: Corresponding to the first locking surface

22: Curved groove

23: Ratchet wheel segment

24: arc-promoting groove

25: corresponds to the second locking surface

26: hook

27: Index structure

28: buckle

29: snap groove

A: The first locked position

B: second locked position

C: third locked position

α (i): middle opening angle

α (max): maximum opening angle

Exemplary embodiments of the present invention will now be described in conjunction with the accompanying drawings, where Figure 1 shows a perspective view of a trimmer according to an embodiment of the present invention; Figure 2 shows a longitudinal cross-sectional view of the trimmer in a fully closed state; Figure 3 shows Longitudinal cross-sectional view of the trimmer in the middle opening position; Figure 4 shows a longitudinal cross-sectional view of the trimmer in the fully open position; Figure 5 shows a side view of the trimmer handle; Figure 6 shows the sliding member of the lock lever assembly in the trimmer; Figure 7 shows a cross-sectional view of the slider according to the line BB of Figure 5; Figure 8 shows the brake claw of the lock lever assembly in the trimmer; Figure 9 shows a longitudinal cross-sectional view of one of the trimmer handles; Fig. 9 shows a top view of the handle of Fig. 9; and Fig. 11 shows a cross-sectional view of a partial locking lever assembly of another embodiment.

According to an embodiment of the present invention, FIG. 1 shows a perspective view of the trimmer 1 as an example of a cutting device. The trimmer 1 may include a cutting blade 2 and a corresponding cutting blade 3, which are respectively coupled to a first handle 4 and a second handle 5 for manually operating the trimmer 1.

The blades 2, 3 are pivotally fixed at a pivot joint 6 to rotate the cutting blades 2, 3, and their cutting edges are disposed opposite to each other. A cutting surface (not shown), for example, when operating the trimmer, the cutting edges of these cutting blades move on the cutting surface, and can correspond to a plane parallel to the center plane of the trimmer 1 relative to the longitudinal direction of the trimmer 1.

The trimmer 1 may include a spring 7, which acts on the handles 4, 5 of the trimmer 1, and generates a spring force to urge the handles 4, 5 to be separated from each other, thereby opening the cutting blades 2, 3. It should be noted that in the configuration of FIG. 1, the trimmer 1 is in a closed position, for example, the blades 2, 3 in this position pivot as close to each other as possible, and the spring 7 is in a compressed state. A corresponding opening angle can be defined as an opening angle of zero degrees.

The trimmer 1 may further include a locking lever assembly 8, which is suitable and configured for latching or locking the cutting blades 2, 3 in the closed state, and for limiting the cutting blades The effective opening angle of 2, 3 to the middle opening angle, where the middle opening angle is between the fully closed state and the fully open state as shown in Figure 1 (refer to Figure 4).

The lock lever assembly 8 may include (as can be seen from FIG. 1) a manually operated slider 9 for manually setting the lock lever assembly 8 to: the first lock position A related to the middle opening angle, the cutting blade 2, 3 The pivot angle at the first locking position A is limited between the fully closed state and the middle opening angle, where the middle opening angle is between the fully closed position and the fully open position; a second locked position B, and the fully closed state Related; and a third locking position C, related to the unrestricted pivoting movement of the cutting blades 2,3.

As indicated in the illustration in the area of the slider 9, the first locked position A may correspond to an operation mode suitable for a smaller hand. The second locking position B may correspond to prohibiting the operation of these cutting blades in the locked state. The unrestricted pivoting movement of the cutting blades 2, 3 in the third locking position C can correspond to an operating mode suitable for larger hands.

The second handle 5 provided on the sliding member 9 on the lock lever assembly 8 includes an elongated arched groove 10 extending longitudinally with respect to the trimmer 1, the sliding member 9 has a corresponding arched cross section, The linear guidance in the back and forth directions in the groove 10 is shown by the double arrows in FIG. 1.

The sliding member 9 can be seen from the perspective and cross-sectional views shown in Figures 6 and 7, respectively, and the arched groove 10 can be implemented in a saddle-like structure, such that the sliding member 9 accompanies the arms 11 from both sides to the top of the sliding member The portion 12 surrounds the arched groove 10 in such a manner that it extends downward. The saddle-shaped coupling joint surface of the sliding member 9 and the arched groove 10 can be implemented in a cylindrical dome and a cylindrical arch structure. When the sliding member 9 moves back and forth in the arched groove 10, it is helpful to avoid the sliding member 9 interference.

Figure 2 shows a cross-sectional view of the trimmer of Figure 1 in the fully closed state. Some details of the lock lever assembly 8 can be inferred from Figure 2. The lock lever assembly 8 may include a brake pawl 13 connected to the slider 9 or implemented integrally with the slider 9.

The brake claw 13 can be seen in detail from FIG. 8, which may include a fixed head 14, a neck 15 and a cantilever beam 16 interconnected with each other, so that the brake claw 13 has an overall L shape or cross section. The fixed head 14 or the platform may include a fastening structure 17 (refer to FIG. 8). In this case, the brake pawl 13 and the slider 9 are implemented as two separate parts, and the slider 9 may include a corresponding correspondence The fastening structures (not shown) are separately configured so that the slider 9 and the pawl 13 can be mechanically coupled to each other.

It can also be seen from FIGS. 1 and 2 that the fixing head 14 is located outside the arched groove 10, while the detent 13 is located inside the arched groove 10, and the neck 15 is guided through a groove The recess 18 (refer to FIG. 1) and the longitudinal direction are guided.

As shown in the locked state shown in FIG. 2, a locking surface 19 (refer to FIG. 8) provided on the shoulder 20 of the brake pawl 13 is engaged with the first arc-shaped groove 22 in such a manner as to approach or abut One corresponds to the shape of the first locking surface 21, in particular the ring segment shape of the ratchet wheel segments 23 of the cutting blades 2 shown by broken lines.

The ratchet wheel segment 23 of the cutting blade 2 further includes an arc-shaped groove 24. The arc-shaped groove 24 is also in the shape of a ring segment as shown by the dotted line in FIG. 2, which is located in the arc-shaped concave relative to the radial direction of the pivot joint 6 The groove 22 is outside and longer than the arc-shaped groove 22 with respect to the circumferential direction.

A further arc-shaped groove 24 is defined in the circumferential direction at the end corresponding to the second locking surface 25, the aforementioned second locking surface 25 is adapted to abut on the locking surface 19 of the cantilever beam 16 in the first locking position A, in the first locking position The pivoting movement of the cutting blade 2 on A is limited to the middle opening angle ( α (i)) (alpha-I, see Figure 3).

Fig. 3 shows a cross-sectional view of the trimmer 1 of Fig. 1 arranged at the middle opening position as described above. It can be seen from FIG. 3 that the locking surface 19 of the cantilever beam 16 abuts the corresponding second locking surface 25 of the ratchet-type wheel segment 23 on the cutting blade 2. In such a configuration, the slider is positioned at the first lock position A. An opening angle corresponds to the middle opening angle ( α (i)), which may be approximately 22 degrees, for example.

The sliding member comes to the third locking position C, at which the cutting blade 2 can pivot unrestricted. As shown in FIG. 4, it shows a cross-sectional view of the trimmer 1 in the fully open state. The sliding member 9 is In the third locking position farthest from the pivot joint 6. That is, the slider 9 is retracted as much as possible with respect to the pivot joint 6 so that the locking surface 19 of the cantilever beam 16 is located outside the arc-shaped groove 22 relative to the radial direction of the pivot joint 6 and is also promoting arc The shape of the groove 24 is external so that there is no interference between them. In such a configuration, these cutting blades 2, 3 can be fully opened, in this case meaning that a hook 26 engages the corresponding second locking surface 25. For example, the hook 26 can be implemented or arranged such that the maximum opening angle α (max) (alpha-max) of these cutting blades 2, 3 is about 36 degrees in the fully open state.

FIG. 5 shows a side view of the second handle 5 on the trimmer 1, and the lock lever assembly 8 and the slider 9 are provided on the second handle 5. As can be seen from FIG. 5, the corresponding part of the lateral arm 11 of the slider 9 and the arc-shaped groove 10 (should be an arch-shaped groove 10), especially the lower edge thereof, may include an index structure 27, which is used Come in or snap into the slider at the first to third locking positions AC. In the configuration shown in FIG. 5, the slider 9 is locked at the first locking position A as shown in FIG. 1, and the effective opening angle is limited to the middle locking angle ( α (i)).

The index structure 27 can also be inferred from the cross-sectional view of the slider 9 in FIG. 7 and the cross-sectional view of the second handle 5 in FIG. 9, which can include a buckle 28 or a buckle protrusion and a corresponding buckle groove 29 or recess along The longitudinal direction of the arc-shaped groove 10 is provided. The embodiment of the buckle 28 and the snap groove 29 allows the slider 9 to be locked at the first to third locking positions A-C.

FIG. 10 shows a top view of the second handle 5 accompanied by the slider 9 in the first locked position A. FIG. From FIG. 10, but also from FIGS. 5 and 9, it can be inferred in particular that the sliding member 9 in the arched groove 10 moves in the longitudinal direction substantially corresponding to the cutting shape 1 and/or the second handle 5 Or at least a part of them (refer to the double arrow in FIG. 10).

The sliding member 9 is coupled to the arched groove 10 so that the user can move between different locking positions A to C, for example, a finger of a hand, such as a thumb, actually holds the trimmer 1. Therefore, adjusting the opening angle in the closed state to different opening angles or locking these cutting blades 2 and 3 can be done with relatively easy manual operation.

FIG. 11 shows a cross-sectional view of the lock lever assembly 8 part of the trimmer 1 in other embodiments, which is mainly different from the embodiment shown in FIGS. 1 to 10 in that the ratchet wheel segment 23 of this embodiment includes only A single arched groove 22, and the brake pawl 13 includes a plurality of locking surfaces 30.1 and 30.2, which are provided on respective shoulders. These locking surfaces 30.1 and 30.2 correspond to the locked position in the fully closed state, and the first locked position allows the pivotal movement of the cutting blade 2 to reach the intermediate opening angle α (i).

The configuration shown in FIG. 11 represents the same solution as in FIGS. 1 to 10, which is accompanied by slightly twisted lock surfaces 30.1, 30.2 and corresponding lock surfaces 21. It is not a ratchet wheel segment 23, which includes a plurality of corresponding locking surfaces, but its brake claw 13 includes a plurality of or more locking surfaces 30.1, 30.2, the aforementioned locking surfaces 30.1, 30.2 can be selectively The sliding member 9 along the arc groove 10 uniformly slides into engagement with the single arc groove 22.

In other words, in other embodiments, the brake pawl 13 includes a hierarchical locking surface 30.1, 30.2 designed to engage. By locking the slider (not shown) in the respective locking configuration, the corresponding locking surface 21 is provided in the ratchet type Wheel segment 23.

In such a configuration, the depth of these locking surfaces 30.1, 30.2 on the pawl 13 may be between 2 mm and 3 mm relative to the longitudinal direction of the trimmer 1 in the closed configuration, or relative to the radial direction of the pivot joint, for example .

Referring again to FIG. 8, it can be inferred from FIG. 8 that the locking surface 19 is inclined so that the height of the cantilever beam 16 in the region adjacent to the shoulder 20 increases toward the distal free end of the cantilever beam 16. These corresponding locking surfaces 21, 25 may have a corresponding inclination, so that the braking pawl 13 and the ratchet wheel segment 23 urge each other, in which case, the locking surface 19 and the corresponding locking surfaces 21, 25 are close to or abut each other. Therefore, these inclined surfaces provide a self-locking connection. This leads to additional stability of the machine due to external action on the cutting device, preventing the cutting device from opening unnecessarily (for example when the cutting device falls to the ground). It is mentioned here that although not shown in FIG. 11, correspondingly inclined surfaces may be provided for the embodiment shown in FIG. 11, such as the locking surfaces 30.1, 30.2 and the corresponding locking surface 21.

In particular, it can be inferred from the above-mentioned exemplary embodiments of the present invention that the purpose of the above description can be easily obtained.

1: pruning machine

2: cutting blade

3: Corresponding cutting blade

4: The first handle

5: Second handle

6: pivot joint

7: Spring

8: Lock lever assembly

9: Slider

10: Arched groove

18: Groove guide recess

Claims (14)

A manually operated cutting device, which is a pruning machine (1) or a pruning shear, includes at least one cutting blade (2), and is pivotally fixed to a pivot joint (6), and the cutting device further includes A locking lever assembly (8) can be operated to a first locking position (A) to limit the effective opening angle ( α (max)) of the cutting blade (2) to the middle opening angle ( α (i)), The intermediate opening angle ( α (i)) is between the opening angles defined by the cutting blade (2) between the fully closed state and the fully open state, and the lock lever assembly (8) includes a manual operation slide A brake claw (13) of the member (9), the sliding member (9) is combined with a linear slide (10) to move in and out of the first lock by a movement in the longitudinal direction of the cutting device Position (A), wherein the locking lever assembly (8, 13) includes at least one cantilever beam (16), oriented parallel to the opening face defined by the cutting blade (2), the cantilever beam (16) is in its The distal free end has a locking surface (19, 30.2) for abutting a corresponding locking surface (21) at the intermediate rotational position of the cutting blade (2), thereby limiting the cutting blade (2) to the intermediate opening angle ( α (i)) rotation, wherein the brake claw (13) and the slider (9) are implemented as separate parts fixed to each other, the brake claw (13) includes a fixed head (14) for The brake claw (13) is fixed to the slider (9), wherein the brake claw (13) has an integral L-shaped configuration with the fixed head (14) and the at least one cantilever beam ( 16) A rod-shaped neck (15) interconnected. The manually operated cutting device as described in item 1 of the patent application scope, wherein the locking lever assembly (8, 13) includes a locking surface (19, 30.1) as one of the at least one cantilever beam (16), used The locking engagement with a corresponding locking surface (21) locks the cutting blade (2) in a fully closed state. The manually operated cutting device as described in item 1 or item 2 of the patent application scope, wherein the locking surface (19, 30.1, 30.2) and the corresponding locking surface (21, 25) are relative to their corresponding cantilever beams (16) The longitudinal direction of is inclined to facilitate a self-locking effect between the locking surface (19, 30.1, 30.2) and the corresponding corresponding locking surface (21, 25). The manually operated cutting device as described in item 1 or item 2 of the patent application scope, wherein the locking lever assembly (8) is further operable to a second locking position (B) to cut the cutting blade (2) Locked in the closed state and to a third locked position (C), so that the cutting blade (2) rotates unrestricted between the fully closed state and the fully open state. The manually operated cutting device as described in item 1 or item 2 of the patent application, wherein the sliding member (9) has an arched cross section and is slidably coupled to an elongated arched groove (10) The arched groove (10) is implemented on the outer side of the operating arm (5) combined with a corresponding cutting blade (3). The manually operated cutting device as described in item 1 or item 2 of the patent application scope, wherein the slider (9) includes an index profile (27) for at least the first relative to an intermediate locking position The locking position (A) locks the slider (9), the index profile (27) is implemented on at least one of the two lateral arms (11), the lateral arms (11) from the slider (9) A top (12) protrudes, and further the index profile (27) includes at least one of a second locked position (B) and a third locked position (C) respectively assigned to the fully closed state and the fully open state. The manually operated cutting device as described in item 5 of the patent application scope, wherein the linear guide rail engagement of the linear slide rail implemented on at least one side toward the inner side of the distal end of the arm (11) is implemented on the arched groove (10) A corresponding linear guide rail, the linear guide rail and the corresponding linear guide rail are implemented as a combination of a guide rod and a guide rail. According to the manually operated cutting device described in item 1 of the patent application scope, the braking pawl (13) and the fixed head (14) protrude from opposite sides of a groove-shaped guide recess (18), and the groove-shaped guide recess (18) A handle (5) provided in the device (1), the fixing head (14) includes a sliding profile for sliding engagement with the groove-shaped guide recess (18) so that it can move in the longitudinal direction. According to the manually operated cutting device described in item 1 of the patent application scope, the at least one cantilever beam (16) protrudes from the rod-shaped neck (15) toward the pivot joint (6). A manually operated cutting device as described in item 8 or 9 of the patent application range, wherein the brake claw (13) and the fixed head (14) are removed from the groove shape provided on the handle (5) of the cutting device The opposite sides of the guide recess (18) protrude, and the groove-shaped guide recess (18) is configured so that the pawl (13) moves in a linear motion toward and away from the pivot joint (6), wherein a second The locked position (B) is located closest to the pivot joint (6) and is related to the fully closed state; one of the third locked positions (C) is located farthest from the pivot joint (6) and cut A position related to the unlocking position of the blade (2); and wherein the first locking position (A) between the second locking position (B) and the third locking position (C) is related to an intermediate locking position, The effective opening angle of the cutting blade (2) is limited to the middle opening angle ( α (i)). The manually operated cutting device as described in item 3 of the patent application range, wherein the locking lever assembly (8) includes at least one arc-shaped groove (22, 24), which is circumferentially opposite to the pivot joint (6) Extending and parallel to the opening surface of the cutting blade (2) and combined with the cutting blade (2) or integrally formed with the cutting blade (2), the groove (22, 24) is defined on the corresponding locking surface (21, 25) At least one circumferential end in the circumferential direction, the corresponding locking surface (21, 25) is implemented such that the aforementioned corresponding locking surface (21, 25) abuts the locking surface (19) of the brake pawl (13) , 30.2), in this case, the actual opening angle of the cutting blade (2) corresponds to the middle opening angle ( α (i)), where the corresponding locking surface (21, 25) and the locking surface (19, 30.2) The normal vector of is oriented parallel to the opening face of the cutting blade (2). A manually operated cutting device as described in item 11 of the patent application range, wherein one of the at least one arc-shaped groove (22) is related to a fully closed state, and the locking surface (21) is defined at the circumferential end thereof, For locking engagement with the locking surface (19) of the brake claw (13) in the fully closed state of the cutting blade (2). According to the manually operated cutting device described in item 1 of the patent application range, the maximum opening angle ( α (max)) corresponds to about 36 degrees in the fully open state, and the intermediate opening angle ( α (i)) is about 22 degrees. As in the manual operation of the cutting device described in item 1, the locking lever assembly (8) is combined with a handle (5) of a corresponding cutting blade (3) or a lever portion of the handle (5) Combination, wherein the corresponding cutting blade (3) serves as the corresponding cutting blade of the cutting blade (2).

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