JPH08289664A - Spare blade type electric scissors - Google Patents

Abstract

PURPOSE: To provide electric scissors whose blade body is a detachable spare blade type, capable of readily attaching and detaching the blade body and always pressing the attached blade body by definite force and not needing adjustment of the blade body in automatic scissors capable of automatically opening and closing the blade body by operating an operating switch. CONSTITUTION: An inserting hole 6 for inserting blade bodies 2 and 3 is provided on the top of a body 1 and a power-transmitting mechanism is housed in the body 1 in a state communicating with the inner depth of the inserting holes. These blade bodies 2 and 3 are used as a pair and integrally retained by a definite pressure from a pressing spring 5 and freely insertible into the inserting hole by the pressing spring 5 and an engaging part of base ends of the blade bodies 2 and 3 is engaged with the power transmitting mechanism in the inserted state. Then, a shaft 7 is generated into the body 1 and a pair of blade bodies 2 and 3 to pivotally support the blade bodies 2, 3 on the shaft 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electric scissors in which a blade is opened and closed by operating a switch, and is a replaceable blade type in which the blade can be replaced according to the application, the wear condition of the blade and the like. The invention relates to electric scissors.

[0002]

2. Description of the Related Art Electric scissors have been put to practical use as scissors for agriculture or general horticulture in fruit tree cultivation and tree pruning. In the conventional electric scissors, a set of blades is generally rotatably attached by caulking a screw or a pin, and the gap between the blades and the tightening force of the blade are adjusted by the caulking condition or the screw tightening condition.

[0003]

With the conventional electric scissors in which the blade body is axially attached by caulking the pin to adjust the clearance and tightening force, it is difficult to adjust and the blade body cannot be freely replaced. Different types of blades cannot be used properly. In addition, when the sharpness of the blade body deteriorates due to abrasion or the rubbed state deteriorates, the blade body cannot be removed and re-polished.

Further, in the conventional electric scissors in which a pair of blades are tightened with screws to adjust the clearance and tightening force, the blades can be removed by loosening the screws and can be used as a replaceable blade type. However, it was troublesome to make fine adjustments when installing it. In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to obtain electric scissors in which the blade body can be easily attached to and detached from the main body and which does not require delicate adjustment.

[0005]

According to the present invention, a set of blades is first pressed and held by a spring having a substantially U-shaped cross section, which is inserted into a mounting hole formed at the tip of the main body. Then, the two blade bodies 2 and 3 are pivotally supported by a detachable shaft 7 that penetrates the main body 1 and the two blade bodies 2 and 3.

[0006]

The pair of blades 2 and 3 are pressed and held by the pressing spring 5 to be brought into close contact with each other with a constant force, and can be inserted into the mounting hole 6 of the main body 1 as they are. After that, when the shaft 7 is penetrated from the side surface of the main body, the pair of blade bodies 2 and 3 can be opened and closed centering on the shaft 7. At this time, the set of blades serves as a fulcrum of rotation in a floating state in the axial direction of the shaft 7, and the tightened state of the set of blades is held constant by the force of the pressing spring 5.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the replaceable blade type electric scissors of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, the replaceable blade type electric scissors according to the embodiment of the present invention has a mounting hole 6 formed in a tip portion of a main body 1, and a set of blade bodies 2, 3 is inserted into the mounting hole 6 from the tip. However, the shaft 7 is pivotally supported.

A power transmission mechanism such as a motor 4 and a speed reducer 11 and a control device 12 are housed in the main body 1 and a main switch is provided.
By operating the upper and lower operation switches 14 and 14 at the same time with 13 inserted, a set of blades 2 and 3 is opened and closed. That is, as shown in FIG. 4, the cam 16 is rotated by the output shaft 15 of the speed reducer 11, and the rotation of the cam 16 is converted into the opening / closing motion of the blade bodies 2 and 3.

As can be seen from FIGS. 4 and 8, the cam 16 has a cam groove 17 formed on the front surface thereof, in which engaging portions 2c and 3c at the base ends of the blades 2 and 3 are engaged, The blades 2 and 3 are opened and closed according to the rotation of the cam 16. In the shape of the cam groove 17 shown in FIG. 8, the large angle α ₁ is the step of closing the blade, and the small angle α ₁ is
₂ is the process of opening the blade body, which operates slowly to obtain a large cutting force with a small torque and performs a reliable cutting action, so that the blade body can be released quickly to prepare for the next work. ing.

Although the cam 16 may be integrally formed, in the illustrated embodiment, a female cam 16a having a cam groove-shaped outer peripheral portion and having a recessed portion entirely inside the cam groove is formed. ,
A male cam 16b whose outer peripheral edge forms a cam groove-shaped inner peripheral portion is combined to facilitate manufacture. At the center of the female cam 16a and the male cam 16b, the rearward projecting portion of the male cam 16b fits into the non-circular deformation hole of the female cam 16a, so there is no need for alignment, and the cams are reliably formed. And the protruding portion of the male cam 16b toward the rear is the output shaft 15
To ensure reliable power transmission. And
The female cam 16a, the male cam 16b, and the output shaft 15 have a structure in which the pin 18 maintains the coupling state in the axial direction and can be separated from each other by pulling out the pin 18.

FIG. 5 is a side view of a pressing spring 5 for holding a set of blades, and FIG. 6 is a front view thereof. The pressing spring 5 is formed by bending a leaf spring into a substantially U-shaped cross section, and has a side plate 5a following a top plate 5e having a constant length L and a constant width W.
5b has a rounded shape protruding forward in accordance with the side shape of the tip of the main body, and inward bent pieces 5c and 5d are formed at the lower end so that a pair of blades can be held. There is. Side plate 5a,
As shown in FIG. 6, each of 5b is curved inward, and a slightly larger diameter through hole 19 through which a shaft 7 for pivotally attaching the blade body is loosely penetrated in a rounded portion protruding forward of the side plate. And the side plate 5a, at the position above the through hole 19,
Protrusions 9 and 9 are formed inwardly facing each of 5b.

FIG. 7 is a side view showing an example of the blade body 2 or 3. The blade bodies 2 and 3 have blade portions 2b and 3b ahead of the main body portions 2a and 3a in which the shaft holes 8 are formed, and engaging portions 2c and 3c with the cam 16 at the base end thereof. , 3a are provided with notches 10 at the upper and lower (back side and blade side) concentric circles centering on the shaft hole 8. The notch 10 has a size such that the protrusion 9 formed on the pressing spring 5 is engaged with the notch 10 so that the notch 10 can rotate within the range of the angle β. With the above configuration, the blades 2 and 3 are the same and are inverted and used as a set, and each blade has a cutout portion 10 on either the back side or the blade side.
Engages with the protrusion 9 of the pressing spring. As for the opening / closing angle of the blade body as the scissors, each of the blade bodies 2 and 3 can be opened / closed within the range of the angle β. The shapes of the blade portions 2b and 3b of the blade body are
It can be made into an arbitrary shape according to the purpose and application.
By setting the relational dimensions of the engagement portions 2c and 3c of the base ends 2a and 3a to be the same, they can be freely attached to the main body 1.

The procedure for attaching the blade will be described with reference to FIG. As shown in FIG. 3 (a), the side plate of the pressing spring 5 is forcibly opened, and a pair of blades having the blades 2 and 3 superposed on each other is inserted from the open portion at the lower end. Then, the set of blades is held by the pressing springs 5 so as not to come apart, and the elastic force of the springs makes a close contact with each other, and the projections 9 and 9 of the pressing springs 5 are attached to the blades 2 and 3. The blade body is held in a state where it engages with the notch portions 10 and 10 and does not open and close unnecessarily.

As shown in FIG. 3B, a set of blades integrally held by the pressing spring 5 is inserted into the mounting hole 6 of the main body 1 to open and close the two blades to some extent. While engaging the engaging portions 2c and 3c at the base end with the cam groove 17 of the cam 16,
The blade is set in place on the body. That is, the main body 1
Shaft hole 20, the through hole 19 of the pressing spring 5, and the shaft hole 8 of the blade body.
The positions are aligned with each other, and the shaft 7 is passed through and the retaining pin 21 is attached to the tip end to complete the assembly as shown in FIG. 3 (c). When the blade is removed, it can be easily removed by reversing the above procedure.

In the above-mentioned work of attaching and detaching the blade body, the blade bodies 2 and 3 and the pressing spring 5 are provided with the projection 9 and the notch portion.
Since they are engaged with each other, they can be integrally attached to and detached from the main body, and there is no fear that the pressing spring 5 will be left in the mounting hole 6 of the main body. As a result, the outer dimensions of the pressing spring 5 and the inner dimensions of the mounting hole 6 can be made tight, and the blade body can be prevented from rattling. More specifically, although it is related to the radius of curvature of the side plate of the curved pressing spring 5, the width of the lower end portion of the pressing spring 5 is wider than the mounting hole 6 in the combined state of the pressing spring 5 and the blade body. The main body 1, the pressing spring 5 and the set of blades are firmly attached by setting the state and forcibly inserting. At this time, the elastic force of the pressing spring 5 acts on both the mounting state with the main body and the pressing force of the blade.

In the illustrated embodiment, seats 22 are formed on both left and right side surfaces of the tip of the main body 1 where the mounting hole 6 is formed, and a step is formed at the back end of the side surface where the shaft head 7a is located. While forming the portion 23, the shaft head 7a is chamfered 7b to prevent the shaft from rotating in a deviated manner. Further, a hole 7c for mounting a pin 21 for preventing the shaft 7 from coming off is formed at the tip of the shaft 7. These structures can be arbitrarily designed as long as the shaft 7 can be mounted.

[0017]

According to the replaceable blade-type electric scissors of the present invention as set forth in claim 1, a set of blades held by a pressing spring is simply put into and taken out of a mounting hole of the main body. Since it can be attached and detached, anyone can easily change the blade body for different purposes or exchange the blade body for polishing. And since a set of blades is pressed by the constant force of the pressing spring, it is not necessary to adjust it by screw tightening or caulking as in the past, and even if the blade conditions change due to wear etc. Even if the type of blade body is changed, it is possible to maintain a preferable blade body rubbing state with a constant pressing force. In addition, the spare blade itself can be stored and handled in a unified state with a pressing spring, so it is safe, and if it is desired to separate it for polishing, etc., it can be easily separated by removing the pressing spring. be able to.

According to the second aspect of the present invention, the force for pressing and closely contacting the set of blades is performed at the center of the blades, the force effectively acts, and the pressing force is well balanced as scissors. The function of can be exhibited well.

According to the third aspect of the present invention, the set of blades held by the pressing spring does not fall apart and is lost, and the blades of the held blades open unnecessarily large. It can be safely handled without being damaged, and the pressing spring and the blade body are not separated when mounted on the main body, and for example, there is no fear that the pressing spring remains in the mounting hole of the main body.

According to the invention described in claim 4, in addition to the effect of the invention described in claim 3, the blade bodies can be held more securely, and one blade body is used in combination with the same blade body. It can be manufactured efficiently.

[Brief description of drawings]

FIG. 1 is an overall vertical cross-sectional view showing an embodiment of a replaceable blade electric scissors of the present invention,

FIG. 2 is an exploded perspective view of only a main body and a spare blade portion of the embodiment of FIG.

3 is a cross-sectional view showing the assembly procedure of the blade body of the embodiment of FIG. 1 in the order of steps,

FIG. 4 is a vertical cross-sectional view showing the blade body and the power transmission mechanism of the embodiment of FIG.

FIG. 5 is a side view of only the pressing spring,

FIG. 6 is a front view of only the pressing spring,

FIG. 7 is a side view of only the blade body,

FIG. 8 is a front view of a cam that drives a blade.

[Explanation of symbols]

1 ... Main body, 2, 3 ... Blade, 2a, 3a ... Main part, 2b,
3b ... Blade portion, 2c, 3c ... Engaging portion, 4 ... Motor, 5 ... Pressing spring, 5a, 5b ... Side plate, 5c, 5d ... Bending piece, 6 ...
Mounting hole, 7 ... Shaft, 8 ... Shaft hole, 9 ... Protrusion, 10 ... Notch, 11 ... Reducer, 15 ... Output shaft, 16 ... Cam, 16
a ... Female cam, 16b ... Male cam, 17 ... Cam groove, 18 ... Pin, 19 ... Through hole, 20 ... Shaft hole, 21 ... Pin, 22 ...
seat.

Claims (4)

[Claims] 1. A set of blades 2 mounted on the tip of a main body 1.
In the electric scissors for opening and closing 3 by rotating the motor 4, a pair of blades 2 and 3 are pressed and held by a pressing spring 5 having a substantially U-shaped cross section, and the main body 1 is pressed and held. Insert into the mounting hole 6 provided at the tip of the
3 is a replaceable blade type electric scissors characterized by being supported by a detachable shaft 7 penetrating through the shaft hole 8 of the main body 1 and a pair of blade bodies 2, 3. 2. A pressing spring 5 having a substantially U-shaped cross section is formed by bending a leaf spring into a U-shape, and the left and right side plates 5a and 5b are formed in a concave arc shape in which an intermediate portion is curved inward. , Presser spring 5
The blade bodies (2, 3) combined with the inner side surfaces of the side plates (5a, 5b) of the main body (1) are in contact with each other from the left and right sides on the extension line passing through the shaft hole (8) in the axial direction of the mounting hole (6) of the main body (1). Blade type electric scissors. 3. A pressing spring 5 having a substantially U-shaped cross section is provided with an engaging means which engages with a part of the blade bodies 2 and 3 and allows the blade body to rotate only at a constant angle. Replacement blade type electric scissors according to claim 1 or 2. 4. Left and right side plates of a holding spring 5 having a substantially U-shaped cross section.
The lower ends of 5a and 5b are formed to be bent inwardly 5c and 5d, respectively, so as to be able to enclose a pair of blades 2 and 3, and the left and right side plates 5a of the pressing spring 5 are At the top of 5b,
Protrusions 9 and 9 projecting inward are formed at the facing positions, and the protrusions 9 and 9 are formed on the blades 2 and 3 on the back side and the blade side facing each other 180 degrees about the shaft hole 8. The replaceable blade type electric scissors according to claim 3, wherein the engaging notch portions (10, 10) are provided.