CN106105802B

CN106105802B - Pruning shears

Info

Publication number: CN106105802B
Application number: CN201610600885.8A
Authority: CN
Inventors: 李道焱; 任联营; 朱振杰
Original assignee: Zhejiang YAT Electrical Appliance Co Ltd
Current assignee: Zhejiang YAT Electrical Appliance Co Ltd
Priority date: 2016-07-27
Filing date: 2016-07-27
Publication date: 2022-08-30
Anticipated expiration: 2036-07-27
Also published as: CN106105802A

Abstract

The invention discloses a pruning shear, belonging to the technical field of electric tools and solving the technical problems of complex structure and inconvenient disassembly and assembly of the pruning shear in the prior art, the pruning shear comprises a shell and a blade assembly, wherein a motor for driving the blade assembly and a switch for controlling the motor are arranged in the shell, a rear handle with a rear trigger and a front handle with a front trigger are also arranged on the shell, the front trigger is slidably arranged in an installation cavity of the front handle, a trigger rod is rotatably connected on the rear trigger, a transmission mechanism is connected between the front trigger and the trigger rod, when the front trigger is held, the preceding trigger produces ascending sliding displacement and drives the drive mechanism motion so that the trigger end of trigger bar rotates towards the switch direction before the preceding trigger is relative handle body, grips the back trigger so that the trigger bar moves towards the switch, grips preceding trigger and back trigger so that the trigger bar triggers switch simultaneously.

Description

Pruning shears

[ technical field ] A

The invention belongs to the technical field of electric tools, and particularly relates to pruning shears.

[ background of the invention ]

The pruning shears comprise manual pruning shears and electric pruning shears, wherein the electric pruning shears generally need to be held by two hands for working, a front handle and a rear handle are usually arranged, switch trigger devices are respectively arranged on the two handles, the two switch trigger devices need to be pressed simultaneously, the pruning shears can only work, any one switch trigger device is loosened, and the pruning shears can stop running to meet the requirement of safe use. In the actual use process, the direction of the trimming action is frequently changed, in order to improve the use comfort and ensure that the front handle can normally work under different holding postures (such as leftward inclination and rightward inclination), the trimming shears are also provided with the annular front handle, the switch trigger of the annular front handle can be divided into a rotating rod type trigger and a built-in sliding type trigger, the existing rotating rod type trigger has the problems that the gap is large, the hand is easy to clamp, the strokes of opening the switches on two side surfaces are not enough, and the like, and the built-in sliding type trigger is considered to be a style which is more in line with the ergonomics.

For example, chinese patent CN102047815 discloses a pruning shears, which provides a front handle and a rear handle that can be held by both hands, and the front handle is a ring-shaped built-in trigger structure, and the front trigger can be triggered by pressing a switch trigger on the side of the front handle. The mode that this patent was realized preceding handle and was triggered drives the linear motion that the slider made progress through the rotary motion of preceding handle trigger, through the link gear of slider and dwang, turns into the rotary motion of dwang with linear motion to drive the linkage of follow-up mechanism and open the switch. The pruning shear mechanism is complex in triggering linkage mechanism, multiple in parts and high in cost, and the difference of mechanisms used for pressing the switch at the upper part and pressing the switch at the side surface is large, so that the difference of force for opening the switch in different holding modes is large, and the difference of operation comfort degree is large. In addition, the front handle of the structure is complex to assemble and disassemble and is not suitable for being disassembled and packaged.

For example, chinese patent CN202622752 discloses a structure of a front handle of a built-in trigger of a rotary pruning shears, which realizes the fixing of an auxiliary handle by a screw rod provided with a locking wrench, wherein the screw rod passes through an auxiliary handle and a main body casing and is fastened by a screw rod nut, and the screw rod can be taken out without a tool to detach the auxiliary handle and the main body casing. Although handle angle can be adjusted before this structure, the mechanical linkage of trigger and back trigger before being difficult to realize still need additionally to increase a switch in the handle to only be fit for using in DC pruning scissors product, in addition, there is the wire to link the machine after preceding handle dismantlement, causes the wire to damage and assemble the difficulty easily among the dismouting process.

[ summary of the invention ]

The technical problem to be solved by the invention is to overcome the defects of the prior art and provide the pruning shears which have the characteristics of simple structure and easy disassembly and assembly.

The technical scheme adopted by the invention is as follows:

the utility model provides a pruning scissors, includes casing and blade subassembly, be equipped with in the casing and be used for the drive the motor of blade subassembly with be used for controlling the switch of motor, still be equipped with the back handle of trigger after taking and the preceding handle of trigger before taking on the casing, preceding trigger slidable mounting is in the installation cavity of front handle, it is connected with the trigger bar to rotate on the back trigger, preceding trigger with be connected with drive mechanism between the trigger bar, grip during the preceding trigger, preceding trigger is relative preceding handle body produces ascending slide displacement and drives the drive mechanism motion so that the trigger end of trigger bar towards switch direction rotates, grips back trigger is so that the trigger bar towards switch movement grips simultaneously preceding trigger and back trigger are so that the trigger bar triggers the switch.

Further scheme: the installation cavity wall is provided with a first installation groove, the front trigger comprises a first holding portion, a first protrusion which slides in the first installation groove is arranged on the first holding portion, and when the first holding portion is held, the first protrusion generates upward sliding displacement in the first installation groove.

According to a further scheme, the front trigger further comprises second holding parts positioned on the left side and the right side of the first holding part, a second protrusion is arranged on the second holding part, a second installation groove matched with the second protrusion is formed in the wall of the installation cavity, and when the second holding part is held, the second protrusion slides upwards along the groove wall of the second installation groove in an inclined mode.

In a further aspect, the first mounting groove and the second mounting groove are inverted triangular mounting grooves.

In a further scheme, a third mounting groove is formed in the front trigger, a third bulge defined in the third mounting groove is formed in the wall of the mounting cavity, and in an initial state, the third bulge is located at the top angle of the third mounting groove and is held by the front trigger so that the third mounting groove can generate upward sliding displacement relative to the third bulge.

In a further scheme, the transmission mechanism comprises a connecting piece and a middle rotating rod which is rotatably connected to the shell, the front end of the middle rotating rod is connected with the front trigger, the rear end of the middle rotating rod is rotatably connected with the connecting piece, and the trigger rod is rotatably connected with the connecting piece.

In a further scheme, the front trigger further comprises a screw rod, the screw rod is connected with the front end of the middle rotating rod, and the front trigger drives the screw rod to move up and down to enable the middle rotating rod to rotate.

In a further scheme, a first elastic piece for driving the front trigger to reset is further installed between the front trigger and the installation cavity wall.

In a further aspect, the housing is detachably connected to the front handle.

In a further scheme, a second elastic piece used for driving the rear trigger to reset is further installed between the rear trigger and the rear handle.

The invention has the beneficial effects that:

the front trigger of the pruning shears is slidably arranged in the installation cavity of the front handle, the rear trigger is rotatably connected with the trigger rod, a transmission mechanism is connected between the front trigger and the trigger rod, when the front trigger is held, the front trigger generates upward sliding displacement relative to the front handle body and drives the transmission mechanism to move so as to enable the trigger end of the trigger rod to rotate towards the switch direction, the rear trigger is held so as to enable the trigger rod to move towards the switch, and meanwhile, the front trigger and the rear trigger are held so as to enable the trigger rod to trigger the switch. Compared with the prior art, the front trigger slides to directly drive the transmission mechanism to move, and other sliding parts do not need to be arranged to drive the transmission mechanism to move, so that the overall structure of the pruning shears is simplified, and in addition, the front handle is simpler and more convenient to disassemble.

A first elastic piece used for driving the front trigger to reset is further arranged between the front trigger and the mounting cavity wall. By the design, the front trigger can be quickly reset after the external force disappears.

The shell is detachably connected with the front handle. By the design, later-stage disassembly is facilitated, the packaging volume is reduced, and the boxing quantity is increased.

And a second elastic piece for driving the rear trigger to reset is also arranged between the rear trigger and the rear handle. By the design, the rear trigger can be quickly reset after the external force disappears.

These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

[ description of the drawings ]

The invention is further described below with reference to the accompanying drawings:

FIG. 1 is a schematic view showing the internal structure of pruning shears according to the preferred embodiment of the present invention;

FIG. 2 is an exploded view of the rear handle, transmission and front handle in a preferred embodiment of the present invention;

FIG. 3 is a front elevational view of the front handle with the second handle shell broken away and the front trigger in an initial state in accordance with the preferred embodiment of the present invention;

FIG. 4 is a state diagram of the position of the front trigger when the second operation portion on the left side of the front trigger is held in the preferred embodiment of the present invention;

FIG. 5 is a state diagram of the position of the front trigger when the first operating portion of the front trigger is held in the preferred embodiment of the present invention;

FIG. 6 is a view showing a state in which the front trigger is positioned while the second operation portion on the right side of the front trigger is held in accordance with the preferred embodiment of the present invention;

FIG. 7 is a schematic view of the assembly of the front handle to the housing in the preferred embodiment of the invention.

[ detailed description ] embodiments

The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and not all of them. Other embodiments obtained by persons skilled in the art without making creative efforts based on the embodiments in the implementation belong to the protection scope of the invention.

Referring to fig. 1 to 2, the pruning shears in this embodiment include a housing 1 and a blade assembly 4 for cutting, the blade assembly 4 is installed at the front end of the housing 1, a motor 2, a gear transmission mechanism 3 and a switch 5 are arranged in the housing 1, the switch 5 is used for controlling the opening and closing of the motor 2, and the motor 2 drives the blade assembly 4 to work through the gear transmission mechanism 3. The shell 1 is further provided with a rear handle 6 and a front handle 7, a user can trigger the switch 5 when holding the rear handle 6 and the front handle 7 at the same time, the motor 2 drives the blade assembly 4 to work, when the user releases the rear handle 6 and/or the front handle 7, the switch 5 turns off the motor 2, and the blade assembly 4 stops working at the moment. The rear handle 6 in the present invention is preferably integrally formed with the housing 1. For the sake of convenience of the following description, the end of the front handle 7 is defined as the front end, and the end of the rear handle 6 is defined as the rear end. The specific structure and the working principle of the pruning shears are well known in the art, and the embodiment does not give any detailed description, and only needs to refer to the conventional pruning shears.

Be equipped with back trigger 61 on the back handle 6, the rear end of back trigger 61 rotates through the pivot to be connected on back handle 6, still be connected with second elastic component 63 between back trigger 61 and the back handle 6, second elastic component 63 can be the spring, the shell fragment etc., the front end of back trigger 61 rotates and is connected with the trigger bar 62, when the user grips back trigger 61, the front end of back trigger 61 rotates round back trigger 6 rear end, and drive trigger bar 62 and move towards the direction that is close to switch 5, the trigger end of trigger bar 62 can not contact switch 5's contact this moment. When the external force disappears, the second elastic member 63 drives the rear trigger 61 to reset rapidly, and the front end of the rear trigger 61 rotates around the rear end of the rear trigger 6 and drives the trigger rod 62 to move away from the switch 5.

The front handle 7 comprises a front handle body and a front trigger 73, the front handle body comprises a first handle shell 71 and a second handle shell 72, the first handle shell 71 and the second handle shell 72 are buckled through screws to form an installation cavity for installing the front trigger 73, the front trigger 73 is slidably installed in the installation cavity, a transmission mechanism 8 is connected between the front trigger 73 and the trigger rod 62, the transmission mechanism 8 comprises a connecting piece 81 and an intermediate rotating rod 82, the connecting piece 81 can be a connecting rod, a steel wire pull rope or a steel wire zipper and the like, when the connecting piece 81 adopts the connecting rod, the rear end of the connecting rod is rotatably connected with the front end of the trigger rod 62, the front end of the connecting rod is rotatably connected with the rear end of the intermediate rotating rod 82, the front end of the intermediate rotating rod 82 is connected with the front trigger 73, and the intermediate rotating rod 82 is rotatably connected on the shell 1 through a rotating shaft. Of course, in other embodiments of the present invention, if the connecting member employs a steel wire rope, the steel wire rope is flexibly connected between the trigger bar and the intermediate rotating bar; if the steel wire zipper is adopted, two ends of the steel wire zipper are rotatably connected between the trigger rod and the middle rotating rod.

When the front trigger 73 is held, the front trigger 73 generates upward sliding displacement relative to the front handle body and drives the front end of the middle rotating rod 82 to rotate upwards, at the moment, the rear end of the middle rotating rod 82 pulls the connecting piece 81 to move downwards and drives the front end of the trigger rod 62 to rotate downwards, the trigger end of the trigger rod 62 rotates upwards, but a certain distance still exists between the trigger end of the trigger rod 62 and the contact of the switch 5 at the moment, and the switch 5 cannot be triggered, but the rear trigger 61 is held at the same time, then the front end of the rear trigger 61 drives the trigger rod 62 to move towards the switch 5, and at the moment, the trigger end of the trigger rod 62 triggers the contact of the switch 5. When the user releases the rear trigger 61 and/or the front trigger 73, the switch 5 turns off the motor 2, and the blade assembly 4 stops operating. Compared with the prior art, the sliding of the front trigger 73 can directly drive the transmission mechanism 8 to move, and other sliding parts do not need to be arranged to drive the transmission mechanism 8 to move, so that the overall structure of the pruning shears is simplified, and in addition, the front handle 7 is simpler and more convenient to disassemble and assemble.

As shown in fig. 2 to 3, a first mounting groove 710 is formed on the mounting cavity wall, specifically, the first mounting grooves 710 with the same size are correspondingly formed on the first handle shell 71 and the second handle shell 72, the front trigger 73 includes a first holding portion 730, and first protrusions 731 sliding in the first mounting grooves 710 are formed on the front side and the rear side of the first holding portion 730. The front trigger 73 further includes second grip parts 733 located on both left and right sides of the first grip part 730, second protrusions 732 are provided on both front and rear sides of the second grip parts 733, second mounting grooves 711 having the same size are provided in the first and

second handle cases

71 and 72, respectively, and the second protrusions 732 are slidably mounted in the second mounting grooves 711. The first and

second mounting grooves

710 and 711 are inverted triangular mounting grooves having the same size, and when the front trigger 73 is in an initial state, the first protrusion 731 is located at the bottom of the first mounting groove 710, and the second protrusion 732 is located at the bottom of the second mounting groove 711.

In order to enable the front trigger 73 to be quickly reset to the initial position after the external force disappears, a first elastic member 75 is further installed between the front trigger 73 and the installation cavity wall in this embodiment, specifically, the first elastic member 75 is connected between the top end and two sides of the front trigger 73 and the side wall of the first handle shell 71, the first elastic member 75 may be a spring, an elastic sheet, or the like, and the first elastic member 75 is used for driving the front trigger 73 to return to the initial position after the external force disappears. Of course, it will be apparent to those skilled in the art that the first resilient member may be further installed between the front trigger and the second handle case, which also achieves the basic effects of the present invention and will not be described in detail herein.

As shown in fig. 4, when the user grips the left second grip 733, the left and right second protrusions 732 slide obliquely upward along the left groove wall of the second mounting groove 711 and undergo upward sliding displacement, and the first protrusion 731 slides obliquely upward along the left groove wall of the first mounting groove 710 and undergoes upward sliding displacement, thereby causing the upward sliding displacement L1 of the front trigger 73 with respect to the front handle body.

As shown in fig. 5, when the user grips the first grip portion 730, the second protrusions 732 at the left and right sides slide upward in the second mounting groove 711, and the first protrusions 731 slide upward in the first mounting groove 710, so that the front trigger 73 generates an upward sliding displacement L2 with respect to the front handle body.

As shown in fig. 6, when the user grips the right second grip 733, the left and right second protrusions 732 slide obliquely upward along the right groove wall of the second mounting groove 711 and undergo upward sliding displacement, and the first protrusion 731 slides obliquely upward along the right groove wall of the first mounting groove 710 and undergoes upward sliding displacement, thereby causing upward sliding displacement L3 of the front trigger 73 with respect to the front handle body.

The minimum value of the sliding displacement L1, L2, L3, L1, L2, L3 is 3mm, so as to ensure that the trigger end of the trigger lever 62 can trigger the switch 5. In order to further improve the use comfort of the user, the lengths of the left groove wall and the right groove wall of the inverted triangular mounting groove are equal, and the elastic forces of the three first elastic members 75 are the same. Of course, those skilled in the art can also design the first mounting groove and the second mounting groove as a diamond-shaped mounting groove or a fan-shaped mounting groove, as long as it is ensured that the left groove wall of the mounting groove is inclined from the bottom of the front handle to the top and from right to left, the right groove wall is inclined from the bottom of the front handle to the top and from left to right, and the mounting groove has a top wall limited to the upward movement displacement of the front trigger, which are all within the protection scope of the present invention.

The front handle 7 of the present invention further comprises a screw 74, the screw 74 is screwed into a nut at the bottom of the front trigger 73 and moves up and down together with the front trigger 73, that is, the screw can displace along the central symmetry line X of the front handle 7, and the front end of the middle rotating rod 82 is sleeved on the screw 74.

As shown in fig. 1, 4, 5 and 6, when the user holds the rear trigger 6 and the front trigger 7 at the same time, the front trigger 73 slides upwards relative to the front handle body, so the front trigger 73 drives the trigger end of the trigger rod 62 to rotate upwards through the transmission mechanism 8, and at this time, the front end of the rear trigger 61 also drives the trigger rod 62 to rotate towards the switch 5, so that the trigger end of the trigger rod 62 presses the contact of the switch 5 to turn on the motor 2. When the user releases the rear trigger 62 and/or the front trigger 73, the trigger end of the trigger lever 62 moves away from the switch 5, and the motor 2 is turned off.

Of course, in other embodiments of the present invention, the front trigger may be slidably mounted on the front handle in other manners, for example, a third mounting groove is formed on the front trigger, the third mounting groove is formed on the left, right, and upper sides of the front trigger, the third mounting groove is in a regular triangle shape, a third protrusion is formed on the mounting cavity wall, the third protrusion is defined in the third mounting groove, when the front trigger is at the initial position, the third protrusion is located at the vertex angle of the third mounting groove, and the front trigger is held to enable the third mounting groove to generate an upward sliding displacement relative to the third protrusion. Or the front trigger and the front handle are mounted in a manner of adopting a sliding block and a sliding rail, the technical effects of the invention can be achieved by the two schemes, and the scheme of the invention according to the preferred embodiment of the invention is easy to be understood by the skilled person, so the detailed description is omitted.

As shown in fig. 3 and 7, the front handle 7 of the present invention is rotatably connected to the housing 1 through a screw 9, specifically, positioning grooves 10 for mounting the front handle 7 are provided at two sides of the housing 1, the positioning grooves 10 are provided with positioning holes 11, the screw 9 fixedly mounts the front handle 7 on the positioning holes 11 of the housing 1, when a user detaches the front handle 7, the user only needs to detach the screw 9 to detach the front handle 7 from the housing 1, the detachment is simple and convenient, the packaging volume is reduced, and the packing amount is increased. Of course, in other embodiments of the present invention, a screw may be further fixedly connected to the housing by a person skilled in the art to realize the fixed connection between the front handle and the housing, and the positioning hole is a kidney-shaped hole.

While the invention has been described with reference to specific embodiments thereof, it will be understood by those skilled in the art that the invention is not limited thereto, and may be embodied in many different forms without departing from the spirit and scope of the invention as set forth in the following claims. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.

Claims

1. The utility model provides a pruning scissors, includes casing and blade subassembly, be equipped with in the casing and be used for the drive the motor of blade subassembly with be used for controlling the switch of motor, still be equipped with the back handle of trigger after taking and take the preceding handle of trigger before taking on the casing, its characterized in that: the switch is arranged in the shell, the front trigger is arranged in the installation cavity of the front handle in a sliding mode, the rear trigger is connected with the trigger rod in a rotating mode, a transmission mechanism is connected between the front trigger and the trigger rod, when the front trigger is held, the front trigger generates upward sliding displacement relative to the front handle body and drives the transmission mechanism to move so that the trigger end of the trigger rod rotates towards the direction of the switch, the rear trigger is held so that the trigger rod moves towards the switch, and meanwhile the front trigger and the rear trigger are held so that the trigger rod triggers the switch; drive mechanism includes the connecting piece and rotates the middle bull stick of connection on the casing, the front end of middle bull stick with preceding trigger is connected, the rear end of middle bull stick with the connecting piece rotates to be connected, the trigger bar with the connecting piece rotates to be connected, be equipped with first mounting groove on the installation cavity wall, preceding trigger includes the first portion of gripping, just be equipped with in the first portion of gripping gliding first arch in first mounting groove, when gripping the first portion of gripping, first arch is in produce ascending sliding displacement in the first mounting groove.

2. The pruning shears according to claim 1, wherein: the front trigger further comprises second holding parts positioned on the left side and the right side of the first holding part, second protrusions are arranged on the second holding parts, second mounting grooves matched with the second protrusions are further formed in the wall of the mounting cavity, and when the second holding parts are held, the second protrusions slide obliquely upwards along the groove walls of the second mounting grooves.

3. The pruning shears according to claim 2, wherein: the first mounting groove and the second mounting groove are inverted triangular mounting grooves.

4. The pruning shears according to claim 1, wherein: the front trigger is provided with a third mounting groove, a third bulge limited in the third mounting groove is arranged on the wall of the mounting cavity, and in an initial state, the third bulge is positioned at the vertex angle of the third mounting groove and is held so that the third mounting groove can generate upward sliding displacement relative to the third bulge.

5. The pruning shears according to claim 4, wherein: the front trigger further comprises a screw rod, the screw rod is connected with the front end of the middle rotating rod, and the front trigger drives the screw rod to move up and down to enable the middle rotating rod to rotate.

6. Pruning shear according to any one of claims 1 to 5, wherein: and a first elastic piece for driving the front trigger to reset is further arranged between the front trigger and the mounting cavity wall.

7. Pruning shear according to any one of claims 1 to 5, wherein: the housing is detachably connected with the front handle.

8. The pruning shears according to any one of claims 1 to 5, wherein: and a second elastic piece for driving the rear trigger to reset is further arranged between the rear trigger and the rear handle.