Abstract:
A gardening shears structure comprised of a main member, an extension member, a lock sleeve, an upper connecting rod, a coupler, and a lower connecting rod, a handle and a blade mechanism respectively assembled to the upper connecting rod and the lower connecting rod and, furthermore, a mount conjoined onto the handle and an auxiliary handle situated in the mount. During usage, the user grasps the handle with one hand and holds the auxiliary handle in the other hand to increase garden shears operating stability, while the lock sleeve and the coupler provides for control over the extension member and lower connecting rod to vary overall length, thereby providing for length adjustable and even grass trimming performance.

Description:
BACKGROUND OF THE INVENTION 
     1) Field of the Invention 
     The invention herein relates to gardening tools, specifically a gardening shears structure capable of increased operating and grasping stability, while a lock sleeve and a coupler affords control over an extension member and a lower connecting rod to vary overall length, thereby providing for length adjustable and even grass trimming performance. 
     2) Description of the Prior Art 
     Conventional gardening shears are typically of a fixed length and not suitable for operation and utilization by users of different physical height. Since the user has to bend at the waist to match the height of the gardening shears when its total length is insufficient, the user experiences waist and back pain. Furthermore, one-handed operation is unsteady and increases grass trimming difficulty, resulting in fatigue as well as aches and pains. As such, grass trimming remains unpleasant work. 
     In view of the said disadvantageous factors, the inventor of the invention herein conducted extensive research into improvements that culminated in the successful development of the present invention, which is now submitted to the patent bureau as a new patent application. 
     SUMMARY OF THE INVENTION 
     The primary objective of the invention herein is to provide a gardening shears structure comprised of comprised of a main member, an extension member, a lock sleeve, an upper connecting rod, a coupler, and a lower connecting rod; a handle and a blade mechanism respectively assembled to the upper connecting rod and the lower connecting rod and, furthermore, a mount conjoined onto the handle and an auxiliary handle situated in the mount. During usage, the user grasps the handle with one hand and holds the auxiliary handle in the other hand to increase garden shears operating stability, while the lock sleeve and the coupler provides for control over the extension member and lower connecting rod to vary overall length, thereby providing for length adjustable and level grass trimming performance. 
     To provide a further understanding of the structural features and other particulars of the present invention, the brief description of the drawings below are followed by the detailed description of the invention herein. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1-A is an exploded drawing of the invention herein. 
     FIG. 1-B is an exploded drawing of the lock sleeve of the invention herein. 
     FIG. 1-C is an exploded drawing of the coupler of the invention herein. 
     FIG. 1-D is an exploded drawing of section between the handle and the auxiliary handle of the invention herein 
     FIG. 1-E is a cross-sectional drawing of the handle and the auxiliary handle of the invention herein following assembly. 
     FIG. 1-F is an exploded drawing of the invention herein when equipped with an auxiliary handle of another shape. 
     FIG. 2-A is an isometric drawing of the invention herein after assembly. 
     FIG. 2-B is a cross-sectional drawing of the invention herein after assembly. 
     FIG. 2-C is an isometric drawing of the invention during cutting operation. 
     FIG. 2-D is a cross-sectional drawing of the invention during cutting operation. 
     FIG. 3-A is an isometric drawing of the invention herein when the lock sleeve is actuated downward. 
     FIG. 3-B is a cross-sectional drawing of the invention herein when the lock sleeve is actuated downward. 
     FIG. 3-C is a cross-sectional drawing of the invention herein when retracted. 
     FIG. 3-D is an isometric drawing of the invention herein when retracted. 
     FIG. 4 is an isometric drawing of the invention herein configured for high branch pruning. 
     FIG. 5-A is an isometric drawing of the invention herein illustrating the bottom section of the blade mechanism. 
     FIG. 5-B is an isometric drawing of the invention herein illustrating another bottom section of the blade mechanism. 
     FIG. 6-A is an isometric drawing of a rotary embodiment of the invention herein. 
     FIG. 6-B is an isometric drawing of a rotary embodiment of the invention herein, as view from a different angle. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Referring to FIG. 1-A, FIG. 1-B, and FIG. 1-C, the gardening shears structure of the invention herein is comprised of a lock sleeve  3  assembled between a main member  1  and an extension member  2  of a smaller width, with an upper connecting rod  4 , a coupler  5 , and a lower connecting rod  6  disposed within their interior hollow sections such that the upper connecting rod  4  and the lower connecting rod  6  are respectively assembled to a handle  7  and a blade mechanism  8  and, furthermore, a mount  9  conjoined onto the handle  7  and an auxiliary handle  71  situated in the mount  9 , wherein the said main member  1  is a hollow tubular construct having an insertion hole  11  and an inwardly protruding section  12  at its lower extremity and the extension member  2  is also a hollow tubular construct having holes  21  disposed a certain interval apart along its surface and an outwardly protruding section  22  emerging from its upper extremity; the lock sleeve  3  consists of a lever  31 , a torque spring  32 , and a latch column  33  (as shown in FIG.  1 -B); the latch column  33  is pivotably linked to one end of the lever  31  and the lever  31  is hinged to the lock sleeve  3  by insertion through the torque spring  32 , and based on the principle of applying force to such a projecting element, when one end of the lever  31  is pushed downward, the other end of the lever  31  pushes the latch column  33  inward; the upper connecting rod  4 , a coupler  5 , and a lower connecting rod  6  within the interior space of the main member  1  and the extension member  2  are of an arrangement wherein there are two hollow posts  5 ′ inside the said coupler  5  and following the sleeving of coil springs  5 A, an upper push bar  51  and a lower push bar  52  each having a respective upward and downward squared bend are placed thereon, after which they are fastened to the two hollow posts  5 ′ in the coupler  5  with screws  5 B; two locating holes  5 ″ are formed between the two hollow posts  5 ′ of the coupler  5  to provide for the insertion of two positioning posts  521  under the lower push bar  52  (as shown in FIG.  1 -C), which are then inserted into holes  41  and  61  respectively disposed at a certain interval apart in the upper connecting rod  4  and lower connecting rod  6  such that the upper connecting rod  4  is secured to the coupler  5 ; the auxiliary handle  71  is situated between the handle  7  and the mount  9 , as indicated in FIG. 1-D, and has a spheroid end  711 ; the said mount  9  has a recessed opening  91  and, furthermore, a socket  911  is disposed within the interior walls of the opening  91 , and a three-way slot  912  is formed along the outer periphery of the opening  91 , enabling the placement of the auxiliary handle  71  spheroid end  711  into the mount  9  opening  91 , ensconcing within the interior walls of the socket  911 , and assembly to the handle  7  as a permanently attached component (as shown in FIG. 1-E) or, as indicated in FIG. 1-F the auxiliary handle  71  is installed onto the main member  1  by means of a U-shaped bracket  9 A and the mount  9 . 
     Following the assembly of the said structural components, the latch column  33  on the lock sleeve  3  lever  31  is articulated into a main member  1  insertion hole  11  and an extension member  2  insertion hole  21 , pressing the upper push bar  51  and the lower push bar  52  inside the coupler  5  such that the lower push bar  52  positioning posts  521  are inserted into the upper connecting rod  4  holes  41  and the lower connecting rod  6  holes  61 , resulting in the conjoinment of the upper connecting rod  4  to the lower connecting rod  6  by the coupler  5 , as indicated in FIG. 2-A and FIG. 2-B, while the main member  1  protruding section  12  engages the extension member  2  protruding section  22  to prevent the extension member  2  from being drawn out too far and separating from the main member  1 ; when the handle  7  is grasped to pull the upper connecting rod  4 , the coupler  5  and the lower connecting rod  6  conjoined to the upper connecting rod  4  are moved along with it (while the lock sleeve  3  remains stationary) to drive the cutting operation of the blade mechanism  8 , as indicated in FIG. 2-C and FIG. 2-D. 
     When the user adjusts the overall length of the gardening shears, since the lever  31  is hinged to the lock sleeve  3  by insertion through the torque spring  32 , when the lever  31  on the said lock sleeve  3  is depressed, as indicated in FIG. 3-A and FIG. 3-B, based on the principle of applying force to such a projecting element, the latch column  33  at the other end of the lever  31  is moved outward such that the latch column  33  originally slid into a main member  1  insertion hole  11  and an extension member  2  insertion hole  21  is no longer in the extension member  2  insertion hole  21 , while extracting the latch column  33  originally pressing the upper push bar  51  and the lower push bar  52  inside the coupler  5  such that the lower push bar  52  positioning posts  521  were inserted into the upper connecting rod  4  holes  41  and the lower connecting rod  6  holes  61  results in the elastic force of the coil springs  5 A disengaging the upper push bar  51  and the lower push bar  52  positioning posts  521  from the upper connecting rod  4  holes  41  and the lower connecting rod  6  holes  61 ; as such, the extension member  2  and the lower connecting rod  6  can be moved towards the main member  1  and the upper connecting rod  4  to gradually shorten the length of the garden shears, as indicated in FIG. 3-C and FIG. 3-D; since the coupler  5  and the upper connecting rod  4  are conjoined into a single structural entity, the coupler  5  is maintained at its original position and is not affected by movement and after the extension member  2  and the lower connecting rod  6  are shortened to an appropriate length, the lever  31  is released and the torque spring  32  returns the lever  31  to its original position, at which time the latch column  33  slides into a main member  1  insertion hole  11  and another extension member  2  insertion hole  21 , while also once again pressing the upper push bar  51  and the lower push bar  52  inside the coupler  5  such that the lower push bar  52  positioning posts  521  are inserted into the upper connecting rod  4  holes  41  and the lower connecting rod  6  holes  61  (as shown in FIG.  2 -B), with the gardening shears ready for cutting operation and thereby capable of achieving the objective of the length adjustment. 
     The invention herein can of course be utilized and assembled as a high branch pruning shear  1 ′ and similarly capable of variable length adjustment, as indicated in FIG.  4 . Furthermore, wheels  81  (as shown in FIG. 5-A) or runners  82  (as shown in FIG. 5-B) of a suitable height can be installed to the bottom section of the blade mechanism  8  such that after two blades  83  are assembled to the front end of the blade mechanism  8 , they are not affected by stones or other obstructions on the ground during cutting operation. 
     At the same time, when the user (or a left-handed person) operates the present invention, the handle  7  is grasped in one hand and the auxiliary handle  71  is folded out at a level angle and held in the other hand, following which it can be rotated to the left or to the right (as shown in FIG. 6-A and FIG. 6-B) such that when the handle  7  is operating the blade mechanism  8 , the auxiliary handle  71  and the handle  7  are situated at virtually the same height to increase operating stability for efficient and easily grass trimming that does not require the user to strenuously bend the waist or back and thereby reduces the physical effort involved. 
     In summation of the foregoing section, since the present invention is progressive and meets new patent application requirements, the invention herein is submitted to the patent bureau for review and the granting of the commensurate patent rights.