Electrically powered scissors

Abstract

The utility model provides electric scissors. The utility model discloses electric scissors capable of improving the persistence of sharpness and the durability of the cutting edge. The electric scissors (1) have: a first cutting edge; a second cutting edge; a shaft support member (7) that shaft supports the first cutting edge or / and the second cutting edge to be relatively rotatable; a motor (6) that rotates at least one of the first cutting edge and the second cutting edge to make the first cutting edge and the second cutting edge relatively open and close; an operation part (60) that receives the operation of an operator; and a control part (9) that makes the motor (6) operate according to the operation of the operation part (60). At least a part of the outer surface of one or both of the first cutting edge and the second cutting edge is formed with two or more layers of coating.

Description

Technical Field

[0001] This utility model relates to, for example, electric scissors for cutting a specified object. Background Technology

[0002] In the past, various pruning shears have been used in plant pruning. In recent years, as a type of electric shears, pruning shears that operate by electrically moving the blades have been proposed (electric pruning shears). For example, electric pruning shears that use the driving force of a motor to move the blades for pruning have been proposed (see Patent Document 1).

[0003] In this electric pruning shears, when the trigger is pulled and the shears are tilted, the motor starts, causing the movable blade to open and close relative to the fixed blade. In such electric shears, the consistency of sharpness and the durability of the blade become key considerations.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2-238819 Utility Model Content

[0005] In view of the above-mentioned problems, the present invention aims to provide an electric scissor that can improve the continuity of sharpness and the durability of the blade.

[0006] This utility model provides an electric scissor, characterized in that the electric scissor has: a first blade; a second blade; a shaft support portion that supports the first blade and / or the second blade so that they can rotate relative to each other; a drive source that rotates at least one of the first blade and the second blade to cause the first blade and the second blade to open and close relative to each other; an operation portion that receives operation from an operator; and a control portion that activates the drive source according to the operation of the operation portion, wherein at least a portion of the outer surface of one or both of the first blade and the second blade has two or more layers of coating.

[0007] In the aforementioned electric scissors, the two or more layers of coating include a metallic coating and a resin coating, wherein the metallic coating is formed on the entire outer surface of the first blade and the second blade.

[0008] In the aforementioned electric scissors, the first blade is a movable blade, the second blade is a fixed blade, and the resin coating is formed on the front and side of the movable blade.

[0009] In the aforementioned electric scissors, the metal coating is a hard chrome plating coating, and the resin coating is a fluoropolymer resin coating.

[0010] According to this invention, the sharpness of electric scissors can be improved and the durability of the blade can be enhanced. Attached Figure Description

[0011] Figure 1 This is a partial sectional view of the right side of an electric scissors with the movable blade in the open position.

[0012] Figure 2 This is a partial sectional view of the right side of an electric scissors with the movable blade in the closed position.

[0013] Figure 3 This is a front view showing the structure of the fixed blade of an electric scissors.

[0014] Figure 4 This is a front view showing the structure of the movable blade of an electric scissors.

[0015] Figure 5 This is a top view showing the structure of the fixed and movable blades of an electric scissors.

[0016] Label Explanation

[0017] 1: Electric scissors; 2: Main body; 3: Cutting part; 4: Movable blade; 5: Fixed blade; 6: Motor; 7: Shaft support part; 8: Power supply part; 9: Control part; 22: Transmission mechanism; 60: Operation part. Detailed Implementation

[0018] The following description, in conjunction with the accompanying drawings, describes one embodiment of the present invention. Figure 1 This is a partial sectional view of the right side of the electric scissors 1 of this invention in the open position, as shown in this embodiment. Figure 2 This is a partial right-side view of the movable blade 4 of the electric scissors 1 in this embodiment when it is in the closed position. Furthermore, in the following description, unless otherwise specified, descriptions of direction correspond to the accompanying drawings for the convenience of explanation and do not limit, for example, the embodiment, product, or scope of rights.

[0019] Furthermore, the electric scissors 1 of this invention cuts the object to be cut by using the driving force of a motor to open and close the blades. Hereinafter, embodiments of this invention will be described, but regarding the driving method of the electric scissors 1, an appropriate driving method can be adopted. In the embodiments described below, the electric scissors 1 are used as an example of electric pruning shears for cutting plants or other objects; however, this invention can also be applied to electric scissors other than electric pruning shears.

[0020] like Figure 1 and Figure 2As shown, the electric scissors 1 have: a main body 2 having a length direction; a cutting part 3 provided at one end (one end) of the main body 2 in the length direction; and an operation part 60 for receiving operation (input operation) from the operator (user) to cause the cutting part 3 to operate.

[0021] The cutting section 3 includes: a fixed blade 5, which is fixed to the main body 2; and a movable blade 4, which is configured to rotate relative to the main body 2 (fixed blade 5) and open and close opposite to the fixed blade 5. A fixing part for fixing the fixed blade 5 and a shaft support part (shaft support member) 7 for shaft support of the movable blade 4 are provided at one end (front end) along the length direction of the main body 2. To more securely fix the fixed blade 5, the fixing part preferably has two or more locations.

[0022] The main body 2 houses a motor 6, a power supply unit 8, a control unit 9, a motor shaft storage unit 31, and a transmission mechanism 22. The motor 6 outputs driving force to move the movable blade 4. The power supply unit 8 provides power (electricity) to the motor 6. The control unit 9 controls the various parts of the electric scissors 1. The motor shaft storage unit 31 houses the motor 6 and the motor shaft of the motor 6 (not shown). The transmission mechanism 22 is connected to the motor shaft of the motor 6.

[0023] Motor 6 is an electric motor driven by electricity supplied from power supply unit 8. A general-purpose electric motor can be used as motor 6. Motor 6 and power supply unit 8 are electrically connected to control unit 9, and the operation of motor 6 and power supply unit 8 is controlled by control unit 9.

[0024] The motor shaft housing 31 houses the motor shaft of the motor 6 and a motor shaft bearing (not shown). The outer periphery of the motor shaft bearing is fixed to the main body 2, and the motor shaft bearing supports the motor shaft so that it can rotate. Therefore, the motor shaft of the motor 6 is rotatably supported on the main body 2 via the motor shaft bearing. A gear (not shown) in the transmission mechanism 22 is connected to the end of the motor shaft on the movable blade 4 side.

[0025] The transmission mechanism 22 has multiple gears (gear train). In the transmission mechanism 22, the driving force applied from the motor shaft of the motor 6 is transmitted to the gear (rotary output gear 23) at the end of the movable blade 4 side of the motor shaft in the gear train.

[0026] The rotary output gear 23 is a bevel gear with a gear surface on the side of a truncated cone whose radius decreases from the base towards the front end. It meshes with a gear portion 84 on one surface of the gear plate 81 that acts on the movable blade 4. By rotating the rotary output gear 23 in both directions, the gear portion 84 moves from the meshing portion of the rotary output gear 23 in the tangential direction (vertical direction in the figure). The gear plate 81 is configured to rotate together with the movable blade 4 about the axis of the shaft support member 7. Therefore, by rotating the rotary output gear 23 in both directions, the gear plate 81 and the movable blade 4 rotate about the axis of the shaft support member 7. Thus, the driving force of the motor 6 is transmitted to the movable blade 4 via the transmission mechanism 22 (rotary output gear 23) and the gear plate 81. This performs the opening and closing action of the movable blade 4.

[0027] Furthermore, the structure of the transmission mechanism 22 is not particularly limited. Examples of transmission mechanisms include those that convert the rotational driving force of the electric motor into linear motion and use this linear motion to operate the linkage mechanism mechanically connected to the movable blade 4, and mechanisms that transmit the rotational driving force of the electric motor to the movable blade 4 via transmission components such as gear trains, pulleys, or conveyor belts. Additionally, the transmission mechanism 22 may sometimes include a speed reduction mechanism that slows down the rotational speed of the electric motor.

[0028] The power supply unit 8 includes at least one of the following: a built-in battery embedded in the main body 2, a removable battery that can be attached to or detached from the main body 2, and a power cable that connects to a commercial power source. In this embodiment, the power supply unit 8 includes a removable battery that can be attached to or detached from the main body 2 and a mounting part for mounting the battery.

[0029] The control unit 9 includes an arithmetic unit (e.g., a CPU) and a memory, and receives signals from various parts of the electric scissors 1, and sends control signals to each part of the electric scissors 1 to perform various controls. For example, the control unit 9 controls the motor 6 and the power supply unit 8 to perform the opening and closing control processing of the movable blade 4.

[0030] The operating part 60 includes a trigger lever 61, approximately half of which is located inside the main body 2 and the remaining part protrudes outward as a gripping part. The trigger lever 61 is located at the center of the width direction (left-right direction) of the main body 2 (electric scissors 1) and is formed symmetrically about the center of the width direction of the main body 2.

[0031] The trigger lever 61 is rotatably supported on the main body 2 and rotates by applying force to the grip. Furthermore, an operation detection sensor is installed inside the main body 2 to detect when the trigger lever 61 is operated (rotated). The operation detection sensor is electrically connected to the control unit 9 and sends a signal corresponding to the operation of the trigger lever 61 to the control unit 9. Alternatively, a trigger button may be provided instead of the trigger lever 61.

[0032] Figure 3 This is a front view showing the structure of the fixed blade 5 of the electric scissors 1. Figure 4 This is a front view showing the structure of the movable blade 4 of the electric scissors 1. Figure 5 This is a top view showing the structure of the fixed blade 5 and the movable blade 4 of the electric scissors 1.

[0033] like Figures 1-3 As shown, the fixed blade 5 is a plate-shaped metal component with a fixed blade shaft support hole 50, a fixed blade side cutting portion 51, a fixed blade cutting portion 52, and an anti-rotation hole 53. The fixed blade shaft support hole 50 is a generally circular through hole located at one end (rear end) of the main body 2. The anti-rotation hole 53 is a generally circular through hole separate from the fixed blade shaft support hole 50. The fixed blade shaft support hole 50 communicates with the movable blade shaft support hole 43 of the movable blade 4 and the gear plate shaft support hole 82, and a shaft support member 7 is inserted through the fixed blade shaft support hole 50. The anti-rotation hole 53 is fixed to the main body 2 by a predetermined fixing member. Thus, the fixed blade 5 is fixed so that it cannot rotate relative to the main body 2 (it does not displace relative to the main body 2). Furthermore, the fixed blade side cutting portion 51 is formed with a central concave shape on the side opposite to the movable blade 4. The fixed blade cutting portion 52 is formed in the fixed blade side blade portion 51 at a position opposite (close to or intersecting) the movable blade 4.

[0034] like Figure 1 , Figure 2 as well as Figure 4 As shown, the movable blade 4 is a plate-shaped metal component. A movable blade shaft support hole 43 is provided at one end (rear end) of the main body 2, and a gear plate fixing hole 44 is provided at a position inward of the movable blade shaft support hole 43. Furthermore, the movable blade 4 has a movable blade side cutting portion 41 extending towards the front end and a movable blade cutting portion 42 facing the fixed blade 5 within the movable blade side cutting portion 41. The movable blade 4 is supported by a shaft support member 7 inserted through the movable blade shaft support hole 43, allowing it to rotate relative to the main body 2 and the fixed blade 5. Additionally, a gear plate 81 is superimposed and fixed on the surface of the movable blade 4 opposite to the fixed blade 5. Furthermore, the movable blade cutting portion 42 has a shape corresponding to the shape of the fixed blade cutting portion 52.

[0035] like Figure 1 and Figure 2As shown, the gear plate 81 is a plate-shaped component made of metal or resin, having a gear plate shaft support hole 82 communicating with the fixed blade shaft support hole 50 and the movable blade shaft support hole 43, and a gear portion 84 formed in a wavy shape along the thickness direction on one surface. The gear plate 81 is arranged to overlap with the movable blade 4 in the thickness direction, and the gear plate fixing protrusion 83 is inserted into the gear plate fixing hole 44. In addition, the gear plate 81 is supported by a shaft support member 7 that passes through and is inserted into the gear plate shaft support hole 82 and the movable blade shaft support hole 43 communicating with the gear plate shaft support hole 82, so that it can rotate integrally with the movable blade 4. In addition, the gear portion 84 is formed at one end of the gear plate 81 (on the main body 2 side) and meshes with the rotary output gear 23 of the transmission mechanism 22. In addition, in this embodiment, the gear plate 81 is composed of a different component from the movable blade 4, but the movable blade 4 and the gear plate 81 can also be formed integrally.

[0036] like Figure 5 As shown, the movable cutting edge 4 is arranged to overlap with the fixed cutting edge 5 in the thickness direction (axial direction of the shaft support member 7) of the movable cutting edge 4 and the fixed cutting edge 5. In addition, the back surfaces of the movable cutting edge 4 and the fixed cutting edge 5 (the surfaces opposite to the cutting edge surfaces, i.e., the mating surfaces) are arranged to slide against each other (opposite to each other).

[0037] When the motor 6 is driven, the driving force applied from the motor shaft of the motor 6 is transmitted to the movable blade 4 via the transmission mechanism 22 (rotary output gear 23) and the gear plate 81, causing the movable blade 4 to rotate. Thus, the movable blade side edge 41 of the movable blade 4 and the fixed blade side edge 51 of the fixed blade 5 function as scissors, cutting the object to be cut (see reference). Figure 1 and Figure 2 ).

[0038] The movable blade 4 and the fixed blade 5 have three surfaces on their outer surfaces: a front surface, a side surface, and a back surface. The back surface refers to the mating surface where the movable blade side edge 41 and the fixed blade side edge 51 contact each other; it is the surface that can slide against the other blade body during use. The front surface is the surface located opposite to the back surface; it is the side of the movable blade 4 and the fixed blade 5 that protrudes outwards. The side surface refers to the side end face of the movable blade 4 and the fixed blade 5 in the thickness direction, extending along the length direction of the movable blade 4 and the fixed blade 5.

[0039] In this invention, at least a portion of the outer surface of one or both of the movable blade 4 and the fixed blade 5 is covered with two or more layers of film (coating). Specifically, the two or more layers of film include a metallic film and a resin film. That is, at least a portion of the outer surface of one or both of the movable blade 4 and the fixed blade 5 is covered with a metallic film and a resin film. In this embodiment, the metallic film is formed on the entire outer surface of the movable blade 4 and the fixed blade 5, and the resin film is formed on the outer side of the metallic film.

[0040] For metallic coatings, hard chrome plating, nickel plating, electroless nickel plating, chrome plating, cobalt plating, trivalent white plating, trivalent black plating, and blackening (iron oxide-based oxide coatings) can be used. For resin-based coatings, fluorine coatings and silicon coatings can be used.

[0041] As an example of the surface treatment of this utility model, hard chrome plating can be used as a metallic coating, and fluorine coating can be used as a resin coating.

[0042] Hard chrome plating is a process of forming a high-hardness, wear-resistant metallic coating on the surface of a substrate. The thickness of the hard chrome plating coating (hard chrome coating) can be set in the range of 3 μm to 10 μm, preferably 5 μm. This thickness range allows for improved wear resistance. The hardness of the hard chrome plating coating, measured in Vickers hardness (HV), can be in the range of approximately 800 to 850. This ensures both high wear resistance and surface strength.

[0043] Fluorine coating is a film formed by applying fluorine resin to the surface of a substrate and then firing it to impart functions such as non-adhesion, chemical resistance, and low friction. The film thickness of the fluorine coating can be set in the range of 10μm to 20μm, preferably 15μm. This film thickness range improves wear resistance. The hardness of the fluorine coating, measured with a pencil hardness tester, can be set in the range of 2H to 4H, preferably 3H or around 3H. This ensures high wear resistance.

[0044] Table 1 shows combinations of coatings (metallic coatings and resin coatings). As a prerequisite, the metallic coating is formed on all surfaces of the front, side, and back. Based on this, the resin coating is selectively formed (including all surfaces) on the front, side, and back. As shown in Table 1, there are seven patterns of combinations of metallic and resin coatings (with or without resin coating on each surface).

[0045] Table 1

[0046]

[0047] Model P1 is configured such that a resin-based coating is formed on all surfaces of the movable blade 4 and / or the fixed blade 5, including the front, side, and back sides. That is, in Model P1, the resin-based coating is applied over the entire surface of the metallic coating, which reduces overall blade friction and improves smoothness and durability of operation. Furthermore, since the color can be formed on the entire surface of the blade to match the resin color, design flexibility is improved, and the adhesion of dirt and resin (tar) is prevented.

[0048] Model P2 is configured such that a resin-based coating is formed on the front and sides of the movable blade 4 and / or the fixed blade 5, while the back is only coated with a metal-based coating. In Model P2, the front and sides can be coated with a color corresponding to the color of the resin, thus improving design flexibility and preventing the adhesion of dirt and sap (tar), while ensuring high durability and rust resistance on the back based on the metal coating.

[0049] Model P3 is configured such that a resin-based coating is formed on the sides and back of the movable blade 4 and / or the fixed blade 5, while the front side is only coated with a metallic coating. In Model P3, the sides and back can be coated with a color corresponding to the resin, thus improving design flexibility and preventing the adhesion of dirt and sap (tar). This reduces friction and improves sliding performance on the back side, which becomes the contact surface of the blade, while ensuring high durability and rust resistance based on the metallic coating on the front side.

[0050] Model P4 is configured such that a resin-based coating is formed on the front and back sides of the movable blade 4 and / or the fixed blade 5, while the sides are only coated with a metallic coating. In Model P4, the front and back sides can be coated with a color corresponding to the resin, thus improving design flexibility and preventing the adhesion of dirt and sap (tar). By applying a resin-based coating to the back side, which becomes the contact surface of the blade, friction is reduced, sliding performance is improved, and the high durability and rust resistance of the metallic coating on the sides are ensured.

[0051] Model P5 is configured such that a resin-based coating is formed only on the front side of the movable blade 4 and / or the fixed blade 5, while the sides and back are only coated with a metallic coating. In Model P5, the sliding ability of only the tip portion (front side) of the blade is enhanced, improving the design of the front side and preventing the adhesion of dirt and sap (tar) to the front side. It also ensures high durability and rust resistance based on the metallic coating on the sides and back.

[0052] Model P6 is configured such that a resin-based coating is formed only on the sides of the movable blade 4 and / or the fixed blade 5, while the front and back are only coated with a metallic coating. In Model P6, the sides can be coated with a color corresponding to the resin, thus improving design flexibility and preventing the adhesion of dirt and sap (tar). The metallic coating on the front and back ensures durability and rust resistance.

[0053] Model P7 is configured such that a resin-based coating is formed only on the back of the movable blade 4 and / or the fixed blade 5, while the front and sides are only coated with a metallic coating. In Model P7, the sliding properties of the back of the blade, which becomes the contact surface, are improved, while maintaining the overall strength of the blade.

[0054] Furthermore, the movable blade 4 and the fixed blade 5 can be coated in different ways, or either the movable blade 4 or the fixed blade 5 can have only a metallic coating (without a resin coating). In the above embodiment, the metallic coating is formed on the entire outer surface of the movable blade 4 and the fixed blade 5, but it can also be formed on a portion of the outer surface of the movable blade 4 and the fixed blade 5.

[0055] Thus, in this invention, at least a portion of the outer surface of one or both of the movable blade 4 and the fixed blade 5 is coated with two or more layers of film, including a metallic coating and a resin coating. This, through the combined effect of the two or more layers of film, improves the consistency of sharpness and the durability of the blade.

[0056] Furthermore, according to this invention, a metallic coating and a resin coating can be formed on the front and side surfaces of the movable blade 4. This ensures consistent sharpness. Additionally, it allows for the design to prevent sap and tar from adhering to the blade.

[0057] The electric scissors of this invention correspond to the electric scissors 1 of the above-described embodiment. Similarly, the first and second blades correspond to the movable blade 4 or the fixed blade 5, respectively; the shaft support portion corresponds to the shaft support component 7; the drive source corresponds to the motor 6; the operating portion corresponds to the operating portion 60; and the control portion corresponds to the control portion 9. However, this invention is not limited to this embodiment and various other embodiments can be adopted. Furthermore, the specific structure described in the above embodiments is just one example and can be appropriately modified according to the actual product.

[0058] Industrial availability

[0059] This invention can be applied to the industry of electric scissors used for cutting specified objects.

Claims

1. An electric scissors, characterized in that, This electric scissors has: First blade; Second blade; A shaft support portion that supports the first cutting edge and / or the second cutting edge so that they can rotate relative to each other; A driving source that causes at least one of the first cutting edge and the second cutting edge to rotate, thereby causing the first cutting edge and the second cutting edge to open and close relative to each other; The operating unit, which accepts operations from the operator; and The control unit causes the drive source to operate according to the operation of the operation unit. At least a portion of the outer surface of one or both of the first and second cutting edges is covered with two or more layers of film.

2. The electric scissors according to claim 1, characterized in that, The two or more layers of coating include metallic coatings and resin coatings. The metallic coating is formed on the entire outer surface of the first and second cutting edges.

3. The electric scissors according to claim 2, characterized in that, The first cutting edge is a movable cutting edge, and the second cutting edge is a fixed cutting edge. The resin coating is formed on the front and side of the movable blade.

4. The electric scissors according to claim 2 or 3, characterized in that, The metallic coating is a hard chrome plated coating. The resin coating is a fluorinated resin coating.

Images