Safety scissors

Abstract

The utility model relates to a pair of safety scissors, which comprises a front scissor piece and a rear scissor piece hinged with the front scissor piece. A limiting device is arranged between the scissor front piece and the scissor rear piece so as to limit the opening degree of scissor blades within a specific small range, and the scissor blade overlapping area of the scissor front piece and the scissor rear piece is limited between 0 mm and 2 mm. According to the scissors, the inherent thought of original scissors all the time is broken through, the mode that the front portion of a blade overlapping area is narrow and the rear portion of the blade overlapping area is wide when common scissors are closed is changed into the mode that the front portion and the rear portion of the overlapping area are consistent and narrow, and a sheared object can be conveyed to the inner ends of the two scissor blades only through small opening degree, so that shearing operation is more labor-saving, and shearing efficiency is improved. And some objects which are high in hardness, high in toughness and easy to slide out can be more conveniently sheared. And the limiting device is matched to limit the opening degree of the scissors, so that the safety is greatly improved, the safety purpose that the hands are not easily cut and scratched is achieved, and even children can also safely and conveniently operate the scissors.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of scissors, in particular to a safe scissors. BACKGROUND

[0002] The statements in this section merely provide background information related to the present disclosure and can constitute the prior art. During the implementation of the utility model, the inventors found at least the following problems in the prior art.

[0003] The history of scissors is long. According to research, the earliest scissors in China were discovered in the early Western Han Dynasty, and they evolved from cross-stock scissors to double-stock scissors. The earliest scissors were iron cross-stock scissors, which were characterized by short handles and long blades, with double blades running parallel to each other and no obvious blade parts. They were simple to make. By the late Western Han Dynasty, double-stock scissors appeared, which were connected in the middle of the two stocks with rivets, making the structure more reasonable.

[0004] The ancient Greeks and Romans invented scissors with two blades connected in a "U" shape in the second half of the 11th century BC. Ancient Roman paintings depict scenes of shearing sheep with such scissors.

[0005] The ancient Egyptians began using bronze-cast scissors in the 15th century BC. Archaeological discoveries show that they used such tools in surgical operations.

[0006] Scissors have not changed much in their main structure since modern times. As shown in Figure 1 , rivets are still used to connect the front and back pieces of the scissors and maintain the form of the overlapping area of the blades, which is narrower in front and wider in back when closed. Modern scissors are mainly improved in material to make them sharper and longer-lasting, and are designed with various functions to meet different needs.

[0007] With increasing concerns about safety, especially the safety of young children, scissors have also begun to develop in terms of safety. For example, the patent with application number 201821743151.6, entitled "A safety scissors to prevent injury", designs the tip of the blade B of the second handle as a blunt tip to avoid people being pricked by the scissors head. Not only that, but the product also has a limiting pin to limit the opening angle of the scissors, so as to avoid the fingers and other parts from entering the blade of the scissors by controlling the opening angle of the scissors, thereby reducing the damage of the blade edge to the fingers, especially the fingers of young children.

[0008] Similarly, the patent with application number 201910965086.4, entitled "A safety scissors", is a U-shaped scissors, but it also has a limiting pin to limit the opening degree of the two blades to avoid the fingers and other parts from being injured by the blade.

[0009] However, the applicant found in the actual use of the scissors that although controlling the opening degree of the scissors can avoid the fingers and other parts from being inserted into the scissors to cause injury to a certain extent, since the blade of the scissors adopts the form of narrow in the front and wide in the back in the overlapping area, the cutting operation can only be performed through the front end of the scissors head under the condition of limiting the opening angle of the scissors, which is very laborious, and the cut object is easy to slip out of the scissors, resulting in that the cutting operation becomes more difficult.

[0010] For example, the double-bladed scissors with the patent name "Safety scissors" in the application number 201821743151.6, since the scissors work through the handle at the rear end, the rivet (i.e. the scissors pin) in the middle as the center point, and the cutting is performed by using the principle of lever. If the opening degree of the scissors is small, the front end of the scissors head can only be used to cut the object. At this time, since the distance from the rivet to the cutting point is long, the moment of force is large, which will cause the work of the handle part of the user to increase greatly, and the user (especially children) is very laborious when cutting. And if some objects with smooth surface and toughness are cut, since the cutting position is close to the scissors tip, the cut object is easy to slip out of the scissors, resulting in that the cutting operation fails. And if the opening degree of the scissors is designed to be large, the limiting pin will lose its effect, and the fingers and other parts (especially the fingers of children) still have the risk of being inserted into the scissors and being injured.

[0011] Although the U-shaped scissors in the application number 201910965086.4 does not use the principle of lever for cutting, the force point is located on the outside of the blade, and the above-mentioned laborious problem does not exist. But it still has the problem that the cut object is easy to slip out of the tip when cutting smooth and tough objects. SUMMARY

[0012] In view of the above problems, the purpose of the utility model is to solve some problems in the prior art, or at least alleviate these problems.

[0013] A safety scissors, comprising a scissors front piece and a scissors rear piece with scissors blades at the front end; the scissors front piece is hinged with the scissors rear piece through a scissors pin; a limiting device is further arranged between the scissors front piece and the scissors rear piece to limit the opening degree of the scissors front piece and the scissors rear piece within a certain range; when the scissors are closed, the overlapping area of the scissors blades of the scissors front piece and the scissors rear piece is between 0 and 2 mm.

[0014] Preferably, the overlapping width of the overlapping area of the scissors blades of the scissors front piece and the scissors rear piece is consistent front and back; the edge of the blade of the scissors blade of the scissors front piece and the scissors rear piece is parallel to the line connecting the center of the scissors pin and the front piece limiting hole or the rear piece limiting hole, and is about 0-1 mm more than the line connecting the center of the scissors pin and the limiting pin.

[0015] Preferably, the overlapping area is 1 mm.

[0016] The limiting device limits the opening degree of the scissor front piece and the scissor back piece to a specific range of 6-20 mm.

[0017] The scissor front piece and the scissor back piece are double-strand scissors, and the back ends of the two are provided with handles.

[0018] Optionally, the limiting device comprises a front piece limiting hole arranged on the scissor front piece, a back piece limiting hole arranged on the scissor back piece, and a limiting pin; the first end of the limiting pin is connected with the back piece limiting hole, and the second end of the limiting pin moves in the front piece limiting hole; the diameter of the front piece limiting hole is larger than the diameter of the second end of the limiting pin, so that the opening degree of the scissors is limited to a specific range.

[0019] Further, the front piece limiting hole is located at the back end of the front piece scissor hole by 5-6 mm; the back piece limiting hole is located at the back piece scissor hole by 5-6 mm, and the diameter of the back piece limiting hole is 2 mm; the limiting pin is fixedly connected with the back piece limiting hole.

[0020] Further, the second end of the limiting pin exceeds the back piece limiting hole by 1 mm, so that the second end of the limiting pin moves in the front piece limiting hole. The rod part of the limiting pin can pass through the limiting pin hole on the back of the contact surface of the scissors and extend out of the contact surface by 1-2 mm, so that the second end of the limiting pin moves in the front piece limiting hole.

[0021] The utility model has the following beneficial effects:

[0022] The safety scissors of the present application breaks through the inherent design thinking of the original scissors, changes the form that the overlapping area of the blades of the ordinary scissors is narrow in front and wide in back to the form that the overlapping width is consistent and very narrow in front and back, and only needs a small opening of the front and back pieces of the scissors to send the cut object to the inner end of the two blades of the scissors, which not only makes the cutting operation more labor-saving, but also is more convenient for cutting some objects with large hardness, strong toughness and easy to slide out. In combination with the limitation of the opening degree of the scissors by the limiting device, the safety is greatly improved, the safety purpose of not easily cutting and scratching the hand is achieved, and even infants can operate safely and conveniently. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above structure of the utility model can be further illustrated by the following non-limiting embodiments shown in the drawings.

[0024] Figure 1 It is a schematic view of the existing double-strand scissors;

[0025] Figure 2 It is a schematic view of the scissors of the utility model when the scissors are closed;

[0026] Figure 3 It is a schematic view of the scissors of the utility model when the scissors are opened;

[0027] Figure 4 Figure 2 is an enlarged schematic view of the A area of the utility model;

[0028] Figure 5 Figure 3 is a schematic view of the front piece of the scissors of the utility model;

[0029] Figure 6 Figure 4 is a schematic view of the rear piece of the scissors of the utility model.

[0030] Wherein: 1-rear piece of scissors; 2-scissors pin; 3-limiting pin; 4-front piece of scissors; 5-coincidence area; 6-front piece limiting hole; 7-front piece scissors hole; 8-rear piece limiting hole; 9-rear piece scissors hole; 10-scissors cutting edge; 11-handle. DETAILED DESCRIPTION

[0031] The utility model will be further described below in combination with the drawings, and the embodiments of the utility model are only used for illustrating the utility model but not limiting the utility model, and various substitutions and changes can be made according to the ordinary technical knowledge and conventional means in the art without departing from the technical thought of the utility model, which should be included in the scope of the utility model.

[0032] The applicant finds that no matter which culture the scissors are under, the main structure of the scissors has not changed, that is, the form of the scissors blade coincidence area being narrow in front and wide at back is still maintained when the scissors are closed. According to the query of Baidu, because the material hardness of the scissors blade is low at that time, the scissors blade is designed into the form of the coincidence area being narrow in front and wide at back, so that even if the wear and tear, the scissors can continue to be used after polishing, thereby prolonging the service life of the scissors. Moreover, the wider blade is also convenient for shearing some hard objects. However, according to the research of the applicant, the greater the width of such blade is, the greater the opening degree required is, and the greater the force required when shearing is, thereby increasing the shearing difficulty. Moreover, the existing scissors blade can already use materials such as high-carbon steel, and the factors such as hardness and wear resistance are no longer shackles.

[0033] Based on this, the applicant designs the following scheme.

[0034] As shown in Figure 2 or 5 or 6, a safety scissors comprises a front piece of scissors 4 with a scissors blade at the front end and a rear piece of scissors 1; the front piece of scissors 4 is hinged with the rear piece of scissors 1 through a scissors pin 2; a limiting device is further arranged between the front piece of scissors 4 and the rear piece of scissors 1 to limit the opening degree of the front piece of scissors 4 and the rear piece of scissors 1 within a specific range; when the scissors are closed, as shown in Figure 2 , the scissors blade coincidence area 5 of the front piece of scissors 4 and the rear piece of scissors 1 is between 0 and 2 mm.

[0035] The scissors pin 2 of the scissors is identical with general scissors, and both make the front and rear pieces of the scissors be respectively provided with a front piece scissors hole 7 and a rear piece scissors hole 9 to cooperate with them.

[0036] The specific range of the opening degree of the front and rear blades of the scissors described above can be set according to different situations. For example, for safety scissors used for young children, the range of the opening degree can be designed according to the size of the child's fingers and other parts. At the same time, the present application makes the scissors blades of the front blade 4 and the rear blade 1 thinner, so that the overlapping area 5 when closed is reduced to between 0 and 2 mm. Compared with the structure of the existing scissors in which the overlapping area 5 of the blades is narrow in front and wide in the back when closed, the safety scissors of the present application only need to open a small opening to send the object to be cut to the inner end of the scissors blade. Not only is it not easy to cut or scratch the hand, and the safety requirements are met, but also because the distance between the shearing point and the scissors pin 2 is short, the torque is reduced, making the shearing operation more labor-saving. Not only that, because the shearing point is closer to the inner end of the scissors blade, some hard and tough objects will not slide out of the scissors tip when shearing, making the shearing operation simpler and safer and more convenient for young children to operate.

[0037] Preferably, the overlapping width of the scissors blade overlapping area 5 of the scissors front piece 4 and the scissors rear piece 1 is consistent and very narrow, so that the cut object can be delivered to the innermost end of the two scissors blades by only opening a small opening. Figure 3 As shown. Figure 5 Or 6, the cutting edges of the scissors blades of the front piece 4 and the rear piece 1 are parallel to the line connecting the scissors pin 2 and the center of the circle of the front piece limiting hole 6 or the rear piece limiting hole 8, thereby achieving the consistency of the overlapping width of the overlapping area 5 of the front and rear pieces of the scissors.

[0038] According to the applicant's actual test, if you want to maximize the protection of children, the overlap area 5 is 1mm, which is the best solution. This solution can not only maximize the safety of children, but also allow children to cut some small items that are suitable for them.

[0039] In the above scheme, the overlap region 5 is between 0 and 2 mm. If the overlap region 5 is too small, the object may not be cut. If the overlap region 5 is too large, it will be difficult to deliver the object to the inner end of the scissors blades when the scissors are limited in opening. Of course, a value greater than 2 mm is also possible, but the opening of the scissors must be increased accordingly, which will reduce safety to a certain extent.

[0040] The above solution is mainly used on double-pronged scissors. Figure 2 As shown in FIG3, the front scissors 4 and the rear scissors 1 are double-stranded scissors, and the rear ends thereof are provided with handles 11. Since only a small opening is opened, the cut object can be delivered to the inner end of the two scissors blades. Figure 3As shown, the moment from the object to be sheared to the scissors pin 2 is reduced, thereby saving effort.

[0041] The limiting device primarily serves to restrict the opening of the front and rear blades of the scissors to a specific range. According to the applicant's experimental testing, the limiting device's specific range for limiting the opening of the front and rear blades 4 and 1 is ideally between 6 and 20 mm, effectively preventing injury to users (especially young children). Of course, a range exceeding 20 mm is also feasible, but safety will be compromised. Designers can tailor the design based on the intended user population.

[0042] The limiting device can be implemented in a variety of ways. For example, a highly elastic member can be installed at the junction of the two handles 11 and the scissors blades. When the handles 11 are opened to a certain extent, a strong restoring force will be applied, making it difficult to open the scissors further. Alternatively, a sliding groove can be provided on both handles 11, and the limiting mechanism can be implemented by a U-shaped limiting rod located in the sliding groove of the left and right handles 11 at both ends. Alternatively, a limiting frame can be directly installed on the outer side of the two scissors blades, so that the scissors are directly restrained by the limiting frame after opening to a certain extent. All of these are feasible.

[0043] Of course, a simpler way is Figure 2 As shown in 5 or 6, the limiting device includes a front piece limiting hole 6 provided on the front piece 4 of the scissors, a rear piece limiting hole 8 provided on the rear piece 1 of the scissors, and a limiting pin 3; the first end of the limiting pin 3 is connected to the rear piece limiting hole 8, and the second end is located in the front piece limiting hole 6 and moves; the diameter of the front piece limiting hole 6 is larger than the diameter of the second end of the limiting pin 3, so that the opening degree of the scissors is limited to a specific range.

[0044] The first end of the limit pin 3 can be fixedly connected to the rear plate limit hole 8, or can be interference fit. The second end of the limit pin 3 can extend slightly beyond the rear plate limit hole 8, about 1 mm, so that the second end can move within the front plate limit hole 6. Since the diameter of the front plate limit hole 6 is larger than the limit pin 3, Figure 3 As shown, the movement of the limiting pin 3 can be limited by setting the aperture size of the front plate limiting hole 6, and the distance between the limiting pin 3 and the scissor pin 2 can be coordinated to limit the opening degree of the scissors.

[0045] Specifically, such as Figure 2 As shown in FIG3 , the front piece limiting hole 6 can be located 5-6 mm from the rear end of the front piece scissor hole 7 ; the diameter of the rear piece limiting hole 8 is 2 mm, and the limiting pin 3 is adapted to the rear piece limiting hole 8 .

[0046] The centers of the front piece limiting hole 6 and the rear piece limiting hole 8 are almost located on the same vertical line, so that the limiting pin 3 can move better in the front piece limiting hole 6. The front piece limiting hole 6 can also adopt a sliding groove or the like. The rear piece limiting hole 8 can also not be provided, and the limiting pin 3 is directly fixedly connected with the rear piece 1 by welding, bonding or the like.

[0047] The limiting pin 3 as the limiting device can also be used on a U-shaped scissors. Although the force point of the U-shaped scissors is located at the front end outside of the front and rear pieces of the scissors, the U-shaped scissors cannot save labor by not using the lever principle, but since only a small opening can make the cut object be sent to the inner end of the two scissors blades, when cutting some objects with large hardness, strong toughness and easy sliding, the objects can be well prevented from sliding out of the scissors under the condition of ensuring safety, and the cutting operation efficiency is improved.

[0048] The safety scissors of the present application breaks through the inherent design thinking of the original scissors, changes the form that the blade overlap area is narrow in front and wide at back when the ordinary scissors is closed into the form that the overlap width is consistent and very narrow in front and back, and only needs a small opening of the front and rear pieces of the scissors to send the cut object to the inner end of the two scissors blades, so that the cutting operation is more labor-saving, and some objects with large hardness, strong toughness and easy sliding can be more easily cut. In cooperation with the limiting device to limit the opening degree of the scissors, the safety is greatly improved, the purpose of not easily cutting and scratching the hand is achieved, and even infants can safely and conveniently operate.

[0049] The above-mentioned fixed connection without specification can be riveting, welding, bolt connection or the like, and the movable connection can be hinged or the like.

Claims

1. A safety scissors comprising a scissors front blade (4) having a front end in the form of a scissors blade and a scissors back blade (1); the scissors front blade (4) being hingedly connected to the scissors back blade (1) by means of a scissors pin (2); characterized in that, The scissors front piece (4) and the scissors rear piece (1) are further provided with a limiting device to limit the opening degree of the scissors front piece (4) and the scissors rear piece (1) within a certain range; when the scissors are closed, the overlapping area (5) of the scissors blades of the scissors front piece (4) and the scissors rear piece (1) is between 0 and 2 mm.

2. The safety scissors of claim 1, wherein, The overlapping width of the overlapping area (5) of the scissors blades of the scissors front piece (4) and the scissors rear piece (1) is consistent front and back; the edge of the blade of the scissors blades of the scissors front piece (4) and the scissors rear piece (1) is parallel to the line connecting the center of the scissors pin (2) and the front piece limiting hole (6) or the rear piece limiting hole (8).

3. Safety scissors according to claim 1 or 2, characterized in that The overlapping area (5) is 1 mm.

4. The safety scissors of claim 1, wherein, The limiting device limits the opening degree of the scissors front piece (4) and the scissors rear piece (1) within a certain range of 6 to 20 mm.

5. The safety scissors of claim 1, wherein, The scissors front piece (4) and the scissors rear piece (1) are double-bladed scissors, and the rear ends of the scissors are provided with handles (11).

6. The safety scissors according to claim 1 or 5, characterized in that The limiting device includes a front piece limiting hole (6) provided on the scissors front piece (4), a rear piece limiting hole (8) provided on the scissors rear piece (1), and a limiting pin (3); the first end of the limiting pin (3) is connected with the rear piece limiting hole (8), and the second end moves within the front piece limiting hole (6); the diameter of the front piece limiting hole (6) is greater than the diameter of the second end of the limiting pin (3), so that the opening degree of the scissors is limited within a certain range.

7. The safety scissors of claim 6, wherein, The front piece limiting hole (6) is located 5-6 mm behind the front piece scissors hole (7); the diameter of the rear piece limiting hole (8) is 2 mm, and the limiting pin (3) is fixedly connected with the rear piece limiting hole (8).

8. The safety scissors of claim 6, wherein, The second end of the limiting pin (3) exceeds the rear piece limiting hole (8) by 1 mm, so that the second end moves within the front piece limiting hole (6).

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