JP3001644U - Safety scissors - Google Patents

Abstract

(57) [Summary] [Purpose] Develop safety scissors that allow both blades to be stowed and that allows the deployed blades to automatically close when released from the handle. [Structure] A storage groove 22 is provided on the inner edges of both handles 20, 20 'facing each other so that the left and right blades 30, 30' that have been pivotally closed can be stored in the storage groove, and the pivot metal 40, 40 'is attached so as to straddle the handles 20, 20' and is axially mounted on the rear end of the blade 30, 30 ',
Then, the pivot metal is slid along the inner edges of the handles 20 and 20 'and fitted into the fitting protrusion 212 at the rear end of the handles, so that the blade is stored in the storage groove. The blade can be used in an extended state by fitting it to the fitting protrusion 241 at the front end, and when the blade is further unfolded, the handle 2
When the hands are released from 0, 20 ', the blade can be automatically closed by a tension spring.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to safety scissors, and more particularly to safety scissors capable of storing the entire blade.

[0002]

[Prior art]

 Most of the conventional scissors have a pair of left and right scissors members integrally formed with a handle and a blade. As shown in FIG. 11, the blades 2 are superposed so as to face each other, and the blade 2 and the handle 1 of the scissors member are overlapped. The middle portion is pivotally connected by a pivot 4, and both the handle 1 and the blade 2 pivotally deploy at the same center. Further, the handle 1 is often too long than the blade 2, and the deployment width of the handle is larger than the deployment width of the blade 2, which makes the operation inconvenient.

In addition, during cutting, the blade 2 is not completely closed and the blade edge is left exposed, which is not so safe. For this reason, when not in use, the scissors sheath 3 is put on the blade 2, but the scissors sheath is easily lost, and the lengthwise dimension of the scissors is considerably long, and the volume is bulky, which makes it inconvenient to store and carry. is there.

[0004]

[Problems to be solved by the device]

 In view of the above problems, the present invention can store both blades of the scissors on the inner edges of the two hands of the scissors facing each other, and both hands are automatically closed when the hands are released even during use. The purpose is to provide safety scissors.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, according to the present invention, a storage groove extending to the front end of the handle is provided at the inner edges of the left and right handles facing each other, and a guide groove is provided along the inside of the storage groove. In addition, an arc end that is curved inward and can be fitted to each other is formed at the front end of each handle, and each arc support button pivotally supports the arc end to deploy or close both the handles. In addition to the pivot point, the left and right blades that are pivotally connected to each other are provided with small protrusions that can be slid in the guide groove, and upright at the center of one metal bottom of the pivot metal. The pivot metal that forms a rod and has a fitting tube at the center of the bottom surface of the other metal is straddled over both of the handles, and the upright rod is inserted into the pivoting position of both blades. U-shaped tension spring fitted with a fitting tube Two pieces are provided so as to act on each blade and handle, and both ends of each tension spring are attached so as to abut and press only one handle and the blade that is not fitted to the handle. Safety scissors are provided.

Further, more preferably, at the rear end of each of the both handles, fitting protrusions are provided on both side surfaces close to the inner edge, and fitting protrusions are formed on the outer side surface of the shaft support button. In addition, an enlarged space is provided at the front end of the handle by connecting to the guide groove, and a locking groove orthogonal to the longitudinal direction of the handle is provided on the inner wall of the enlarged space, and the shaft support metal. On the bottom surface of each handle, there are provided fitting protrusions and ring grooves capable of fitting and fixing provided at the front and rear ends of the handle. Further, one end of the U-shaped tension spring is attached to the handle of the handle. It is locked in a stop groove and the other end is formed into an arcuate end that curves so that the tip faces the centerline side of the scissors and abuts on the ridges of both blades, or both handles Protrusions are provided on the front and back sides that extend along the longitudinal direction of the handle, and the bottom surface of the pivot metal is contacted and supported. At the same time, an inclined surface that narrows toward the handle is formed on the peripheral edge of the pivot metal.

[0007]

[Action]

 With the safety scissors of the present invention configured as described above, when the user releases the hand from the handle, the blade springs of both blades are pressed by the tension springs so that the blades can be automatically closed. Since the engaging small protrusions at the rear end of the blade engage with the guide grooves along the inside of the storage grooves of both handles, the handles also rotate and close. The blade can be stored in the storage groove of the handle by pulling the support metal that is pivotally supported at the connection point toward the rear end of the handle, and the ring groove on the bottom of the support metal is located at the rear side of both handles. When fitted to the fitting ridges at the ends, the pivot metal cannot be easily moved and the blade can be stored tightly. To extend the blade, hold the pivot metal and push it toward the front end. Furthermore, by fitting the ring grooves on the bottom of both pivotal support metals at the rear end of the blade into the fitting protrusions of the pivot button of the handle, in combination with the regulation of the enlarged space at the front end of the handle, Both blades can be rotated and deployed in accordance with the rotational expansion of the blades. Since the position of the pivot button, which is the center of rotation of the handle, is in front of the position of the pivot metal, which is the center of rotation of the blade, conventional scissors that rotate and deploy the blade and the handle at the same center. Compared with the above, the safety scissors of the present invention have a wide range of rotational expansion of both blades in comparison with the rotational expansion of both handles.

[0008]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The safety scissors shown in FIGS. 1 and 2 are provided with handles 20, 20 ', blades 30, 30', pivot metal 40, 40 ', and tension spring 50.

One of the handles 20 is made of plastic by injection molding, and protrusions 211 are provided on the front and back surfaces of the handle 21 to project at appropriate heights and extend in the longitudinal direction of the handles. In addition, fitting protrusions 212 are respectively provided on the extension lines of the protrusions, and as shown in FIG. 3, a storage groove 22 having an appropriate width and depth is formed along the inner edge of the handle 21, A raceway 221 is integrally molded in the storage groove, a guide groove 222 is formed inside the raceway, an expansion space 223 extending from the guide groove 222 is provided at the front end of the handle portion 21, and the storage groove 22 is communicated with and expanded. A locking groove 224 is formed in the side wall of the space 223 so as to directly intersect the longitudinal direction of the handle, and a fixing groove 225 having an appropriate depth extending to the front end is also formed on the bottom surface of the expansion space 223. Axial to the tip side wall An active groove 226 having an appropriate width is formed so as to vertically penetrate therethrough, so that arcuate end portions 23 that curve inward and upward are formed above and below the front end of the handle portion 21, respectively, and at the same time, the outer surface is formed on the inner surface of the arcuate end portion. A recessed surface 231 having a beveled surface 232 is recessed in the peripheral edge, a stepped hole 233 is bored at a substantially central portion of the recessed surface, and both shaft support buttons 24 are fitted into the stepped hole. The shaft support button 24 has an upper end surface provided with a fitting projection 241 projecting outside the stepped hole 233 hole, and a bottom surface of the shaft support button 24 provided with a projection ring 242 fitted and pivotally fitted in the stepped hole 233. A pivot pin 243 is provided at the lower end of the support button 24 so as to project from the recessed surface 231 to an appropriate length.

The other handle 20 ′ is similarly integrally molded of plastic, and as shown in FIG. 2, corresponding to the one handle 20, a handle portion 21 ′ and convex ridges 211 on the front and back surfaces of the handle portion 21 ′. A fitting protrusion 212 and a track 221 are provided at the rear end of the handle portion. Unlike the one handle 20, the handle 20 'is provided with arcuate end portions 23' at the front end of the handle portion 21 'at appropriate intervals, and the concave surfaces of the upper and lower arc end portions 23 of the one handle 20. It is designed so that it can be fitted between 231. A pin hole 231 'is drilled in a substantially central portion of the circular arc end portion 23' to pivotally mount a pivot pin 243, and a fulcrum pivoted by the circular arc end portions 23, 23 'of the handles 20, 20' is formed. Has been done.

As shown in FIG. 2, each of the blades 30 and 30 ′ is provided so that it can be fitted into the storage groove 22 of the handle portions 21 and 21 ′. A penetrating hole 31 is formed near the rear end of the blade, a slightly narrower extension end 32 is formed at the rear end of the blade 30, and an outwardly bending protruding plate 33 is provided at the tip of the extension end. A small engaging protrusion 34 is provided on the protruding plate so as to be slidable while being engaged in the guide groove 222. The blades 30 and 30 'have shapes corresponding to each other. The difference is that the engaging small protrusions 34' of one blade 30 'are provided on the surface opposite to the protruding plate 33, and the blades 30 and 30' are also different. When the rear ends are overlapped, the through holes 31 are aligned with each other, and the hollow rivets 35 pivot the holes.

As shown in FIGS. 2, 4, and 6, the pivot metal 40, 40 ′ has a disk shape and is attached so as to straddle both handle portions 21, 21 ′. One of the pivotally supported metal 40 is provided with a tapered step-like upright rod 41 at the center of the bottom surface, and a fitting rod 411 extending from the upright rod and having a relatively small outer diameter is formed, and as shown in FIGS. Is provided with a ring groove 42 that is recessed in an arc shape having an appropriate radius, width and depth around the circumference with an appropriate distance from the upright rod, and narrows toward the handle at the periphery of the pivot support metal 40. The inclined surface 43 is formed, and the concave surface 44 is formed on the upper end surface of the pivot support metal 40. In addition, a fitting tube 46 having an appropriate inner and outer diameter and length is provided at the center of the bottom surface of the other pivot metal 40 ', corresponding to the one pivot metal 40. The pivot metal 40, 40 'is inserted into the hollow rivet 35 pivotally connected to the blade 30, 30' from between the inner edges of the pivotally closed handle parts 21, 21 ', and the fitting tube 46 and the fitting rod 411 are inserted. To fit and pivot.

As shown in FIGS. 2, 7 and 8, the tension spring 50 is curved in a U shape and is mounted in the fixing groove 225 of the enlarged space 223 of the handle portions 21 and 21 ′, and has the U shape. One of both side ends is formed as a long side end 52 and the other side is formed as a short side end 51, and the tip of the short side end is curved outward with respect to the center line side of the scissors and is engaged with the locking groove 224. 511, and the long-side end 52 is an arcuate end 521 that is curved so that its tip faces the centerline side of the scissors.

When assembling and using, as shown in FIGS. 2, 3, 4, and 6, the circular arc end portion 23 of one handle 20 and the circular arc end portion 23 ′ of the other handle 20 ′ face each other. Then, by utilizing the inclined surface 232 that is inclined and developed at the peripheral edge of the recessed surface 231 of the handle portion 21, both arc end portions 23 ′ of the other handle 20 ′ can be easily placed in the recessed surface 231 of the arc end portion 23. Mating. Since the outer surfaces of the upper and lower arc end portions 23 'of the other handle 20' are provided at appropriate intervals, they can be easily and accurately fitted into the recessed surface 231 of the arc end portion 23 '. In addition, since the protrusion ring 242 of the shaft support button 24 has an appropriate flexibility, it can be press-fitted into the stepped hole 232 to fit and firmly contact the protrusion ring 242 and the stepped hole 232. A pivot pin 243 that can be formed and extends from the bottom surface of the pivot button 24 is fitted into a pin hole 231 'on the other handle 20' side to form a pivot fulcrum of the superimposed handles 20, 20 '. Then, the handle can be pivotally deployed or pivotally closed about the pivot pin 243.

Subsequently, as shown in FIGS. 2, 4, 5, and 7, the hollow rivet 35 is inserted into the through holes 31 of both the blades 30 and 30 ′ that are overlapped and pivotally connected to each other, and the hollow rivets 35 of the blades are attached. The extended ends 32 of both blades are fitted into the storage grooves 22 of the respective handle parts so that the small engaging protrusions 34, 34 'are engaged in the guide grooves 222 of the handle parts 21, 21'. Then, one pivot support metal 40 is straddled over the pivotally closed handle portions 21, 21 ', and the fitting rod 411 of the upright rod 41 at the bottom end of the pivot support metal 40 is inserted into the hollow rivet 35. The other support metal 40 'is straddled over the handle portions 21 and 21', and the fitting tube 46 of the support metal 40 'is fitted and fixedly attached to the tip of the fitting rod 411. ′ Hold the bottom surface so that the ridges 211 of the hands 20, 20 ′ come into contact with and support.

Further, as shown in FIGS. 7 and 8, the U-shaped curved portion of the tension spring 50 is formed to have an appropriate thickness, and the projection end 511 of the short side end 51 of the tension spring is locked in the locking groove. The tension spring is installed in the fixing groove 225 of the expansion space 223 so as to engage with the 224 and bring the arc end 521 of the long end side 52 into contact with the edge of the blade. The long side end (52) of each tension spring (50) has a locking groove (224) with which the short side end (51) is engaged. It abuts on the blade of the blade not fitted to the handle. Has been done.

When the above assembling work is completed, as shown in FIGS. 4 and 5, the bottom surfaces of the pivotal metal members 40 and 40 'come into contact with the ridges 21 of the handle portions 21 and 21' so that the handle portions 21 and 21 'are in contact with each other. The inner surfaces of the support metal 21 and 21 'are not pressure-contacted, and the pivotal metal 40, 40' is easily protruded by reducing the resistance action by using the slope 43 which is narrowed toward the handle at the periphery thereof. 212 is slidable, and the pivot metal 40, 40 'can be slid smoothly and stably, and at the same time, the pivot metal allows the blades 30, 30' to be inserted into the grooves of both the handle parts 21, 21 '. It can be introduced and stored in 22. That is, the blades 30 and 30 'can be housed in the handles 20 and 20'.

When the pivot metal 40, 40 ′ is safely retracted into the handle portions 21, 21 ′ by manipulating the blades 30, 30 ′ safely, the pivot metal 40, 40 ′ is located at the ends of the handle portions 21, 21 ′. When it slides in, the ring grooves 42 on the bottom surface of the pivotal metal 40, 40 'will engage with the fitting protrusions 212, and the fitting protrusions 212 of the handles 20, 20' will ring to the left and right. Even if only one of the pivot support metals 40 is moved by fitting in the groove 42, the circumferential chord length of the ring groove becomes longer or shorter, so that the pivot support metals 40, 40 'can be pressed by an appropriate amount. Can be fitted and fixed to the fitting projection 212, whereby the handles 20, 20 ′ can be joined more and more tightly and cannot be easily rotated or deployed, so that the handles 20, 30 ′ can be attached to the stored blades 30, 30 ′. You can secure safety. In particular, since the blades 30 and 30 'are stored when not in use, there is no risk of being damaged by the blades, and the entire blades 30 and 30' are housed in the handles 30 and 30 ', so scissors The overall length is greatly shortened, making it convenient to store and carry.

When using the scissors of the present invention, when the concave surface 44 of the pivot metal 40, 40 ′ is pressed by the thumb and forefinger and slid in the direction of the cutting edge with an appropriate force, the blade 30, 30 ′ is pushed out. It can be used for cutting, and when the pivot metal 40, 40 'slides in the forward direction, it can easily slip over the fitting protrusion 212 due to the reduction of the above-mentioned resistance effect, and the ring groove 42 can be pivotally supported. By fitting and fixing to the fitting protrusion 241 on the upper end surface of the button 24, the blades 30 and 30 'extended to a predetermined length can be stably held, and cutting can be performed without shaking the handle. it can.

Further, as shown in FIGS. 7 and 9, the blades 30 and 30 ′ are extended to a certain length during cutting, the pivot pin 243 is separated from the hollow rivet 35 by a predetermined distance, and the handles 20 and 20 ′ are separated. The blades 30 and 30 'rotate around the hollow rivet 35 as a fulcrum, while ′ has a scissor structure and rotates around the pivot pin. That is, the handle and blade each have their own axis of rotation.

Therefore, when both handles 20, 20 'are unfolded, both blades 30, 30' are unfolded at the same time as shown in FIG. 10, and the roots of the blades 30, 30 'are almost active due to the movement at this time. Conventionally, the blades 30 and 30 'can be greatly expanded by being transferred into the groove 226, and the center of rotation of the blades 30 and 30' is completely transferred to the hollow rivet 35 so that the blade and the handle are deployed at the same center of rotation. Compared to the scissors, the deployment rotation of the blades 30 and 30 'of the present invention is obviously wider. That is, when the handles 20 and 20 'are unfolded to the same width and the closing operation is performed, the blades 30 and 30' of the present invention are spread more widely, and the cutting speed of the blade is relatively quick. .

Then, when the blades 30 and 30 ′ are extended and used for cutting, as shown in FIGS. 8 and 10, when the handles 20 and 20 ′ are unfolded, the blades 30 and 30 ′ also begin to unfold. However, at this time, the blade ridges of the blades move outwardly to more strongly press the arc end 521 of the long side end 52 of the tension spring 50. According to the present invention, when the force is released from both the handles 20, 20 'by this pressing, the blade return of both the blades 30, 30' is pressed by the elastic restoring force of the tension spring, and the blade 3 is automatically 0, 30 'can be closed.

[0023]

[Effect of device]

 With the safety scissors of the present invention configured as described above, when the use is temporarily suspended, both blades are pivotally closed by the elastic action of the tension spring when the force is released from the holding hand or when the hand is released. However, since the scissors of the blade are not exposed, safety can be ensured. After use, the closed blade can be stored in the storage groove of the handle by pivoting metal, making it convenient to store and carry. Also, when the blades are extended and used, the rotation center of both blades is located at the rear end of the rotation center of both handles, so it corresponds to the rotation expansion width of the handles. The swiveling width of the blade is wider than that of conventional scissors, and the cutting speed is higher.

[Brief description of drawings]

FIG. 1 is a perspective view of safety scissors according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the scissors.

FIG. 3 is a perspective view showing the handle of the scissors with a part thereof cut away.

FIG. 4 is a plan view showing a state in which the blade is stored in the scissors.

5 is a sectional view taken along line 6-6 of FIG.

6 is a sectional view taken along line 7-7 of FIG.

FIG. 7 is a plan view showing a state in which the blades of the scissors are closed.

FIG. 8 is a partially enlarged view of FIG. 7, showing a state in which the tension spring is in contact with the edge of the blade of the scissors.

FIG. 9 is a perspective view showing a state in which the blade of the scissors is extended from a handle.

FIG. 10 is a plan view showing a state in which the blade of the scissors is developed.

FIG. 11 is a perspective view of conventional scissors.

[Explanation of symbols]

 20 Handle 20 'Handle 211 Convex strip 212 Fitting protrusion 241 Fitting protrusion 22 Storage groove 222 Guide groove 23 Arc end 23' Arc end 223 Enlarged space 224 Locking groove 30 Blade 30 'Blade 34 Engagement Small protrusion 40 Pivot metal 40 'Pivot metal 41 Upright rod 42 Ring 43 Slope 46 Fitting tube 50 Extension spring 52 Arc end 24 Shaft support button

Claims (3)

[Scope of utility model registration request] 1. A storage groove (22) extending to a front end of each of the right and left handles (20, 20 ') facing each other at inner edges thereof.
And a guide groove (222) is provided along the inside of the storage groove, and arcuate end portions (23, 23) that can be fitted to each other by curving inwardly at the front end of each of the handles (20, 20 '). ′) Is formed, and the arcuate end portions are pivotally supported by the respective pivotal support buttons (24) to serve as rotation fulcrums for deploying or closing the both handles (20, 20 ′), and are pivoted with respect to each other. On the rear ends of the left and right blades (30, 30 ') that are in contact with each other, there are provided small engaging protrusions (34) that fit into the guide grooves and can slide, and one of the pivotal metal (40, 40'). The upright rod (41) is formed in the center of the bottom surface of the metal, and the pivot metal (40, 40 ') provided with the fitting tube (46) in the center of the bottom surface of the other metal is used for both handles (20, 20'). )
And the upright rod over both blades (3
2) so that the U-shaped tension spring (50) acts on the blades (30, 30 ′) and the handle by inserting the U-shaped tension spring (50) into the fitting tube. One piece is provided with both ends of each tension spring (50),
And a pair of safety scissors mounted so as to abut and press the blades that are not fitted to the handle. 2. The fitting protrusions (212) are provided on both side surfaces near the inner edge at the rear end of each of the two handles, and the fitting protrusions (212) are formed on the outer surface of the shaft support button (24). 241) and is connected to the guide groove (222) to form the handle (2).
0, 20 ') an enlarged space (223) is provided at the front end, and a locking groove (224) orthogonal to the longitudinal direction of the handle is provided on the inner wall of the enlarged space, and the shaft support metal (40, Four
0 ') has ring grooves (42) capable of fitting and fixing with fitting protrusions (241, 212) provided at the front and rear ends of the handles (20, 20'), respectively, on the bottom surface, One end of the U-shaped tension spring (50) is locked in the locking groove (224) of the handle, and the other end is formed into an arc end (52) which is curved so that its tip faces toward the center line of the scissors. Safety scissors according to claim 1, characterized in that they are formed so as to abut the ridges of the two blades (30, 30 '). 3. The convex strips (211) extending along the longitudinal direction of the handles are provided on the front and back surfaces of both the handles so that the bottom surfaces of the pivot support metal (40, 40 ') are abutted and supported.
The safety scissors according to claim 2, wherein an inclined surface (43) narrowing toward the handle is formed on the periphery of the pivot metal.