JPH1052578A - Scissors - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the usability of a pair of scissors by deforming the shape of a handle part. SOLUTION: A pair of scissor pieces 11 and 12 are turnably supported by a shaft 13, blade parts 14 and 15 are formed on a tip side from the shaft 13 and supporting rods 16 and 17 are formed on a base end side. One end part of the handle parts 18 and 19 is attached to the supporting rods 16 and 17 and the handle parts 18 and 19 are constituted of thermoplastic shape memory resin capable of being hardened at a normal temperature. That is, the shape memory resin is turned to a shape memory polymer for changing an elastic modulus accompanying temperature change. Then, in order to deform the handle parts 18 and 19, the handle parts 18 and 19 are heated in boiled water and softened. When they are softened, the shape of the handle parts 18 and 19 are deformed matched with the size of fingers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to scissors.

[0002]

2. Description of the Related Art Conventionally, there is scissors in which a synthetic resin handle portion for passing a finger is attached to a base end of a pair of rotatably supported scissors pieces.

[0003]

However, in the scissors described above, the size of the handle cannot be freely changed in accordance with the size of the finger. Therefore, if the size of the handle part does not fit the finger, the finger may hurt or be difficult to use.

Accordingly, an object of the present invention is to improve the ease of use of scissors by allowing the shape of the handle to be deformed according to the size of the finger or the like.

[0005]

According to the first aspect of the present invention, a tip of a handle portion is attached to a base end of a pair of scissors pieces rotatably supported, and the handle portion is made of a shape memory resin. That is the gist. Therefore, according to the first aspect of the present invention, the handle portion is heated to a temperature higher than the predetermined temperature and softened. In this state, the handle portion is bent and deformed into a desired shape so as to fit the size of a finger or the like. When the handle is cooled to a predetermined temperature or lower after the deformation, the handle is hardened and is maintained in the deformed shape.
Therefore, since the shape of the handle portion can be changed according to the size of the finger or the like, the finger does not hurt even if the finger is passed through the handle portion.

The gist of the present invention is that the handle portion is partially cut off. Therefore, according to the invention described in claim 2,
In addition to the effect of the first aspect of the present invention, when the handle is deformed, the handle is partially cut off, so that the handle can be significantly deformed.

According to a third aspect of the present invention, the gist of the present invention is that the handle portion has a thin portion in at least a part thereof. Therefore, according to the invention described in claim 3, in addition to the operation of the invention described in claim 1 or 2,
Since the handle portion is thinned by the thin portion, the handle portion is easily deformed.

According to a fourth aspect of the present invention, the handle portion has one or more branched finger hook portions. Therefore, according to the invention described in claim 4, in addition to the effects of the inventions described in claims 1 to 3, the operability of the handle portion is improved by deforming one or more finger hook portions branched from the handle portion. Can be done.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 and 2, a pair of scissor pieces 1
1 and 12 are rotatably supported by a shaft 13,
Blade portions 14 and 15 are formed on the distal end side, and support rods 16 and 17 are formed on the proximal end side with respect to the coaxial 13. These support rods 16 and 17 have handle portions 18 and
One end of 19 is attached.

The handles 18, 19 are made of a thermoplastic shape memory resin which can be cured at room temperature. That is, the shape memory resin in the present embodiment is a shape memory polymer whose elastic modulus changes with a change in temperature, and among them, a polyurethane shape memory polymer having a particularly excellent moldability (trade name “Diality”, Mitsubishi Heavy Industries, Ltd.) Co., Ltd.)
It has become. This polyurethane-based shape memory polymer has a glass transition region temperature (60 ° C. to 1 ° C. in this embodiment).
When the temperature reaches 00 ° C., the rubber softens, and when the temperature falls below a predetermined temperature (40 ° C. or less in the present embodiment), it hardens.

The handle portions 18 and 19 are connected to the scissor pieces 1.
Bases 18a, 19a extending along the longitudinal direction of
And finger hooks 18b, 19b which are curved in a semicircular shape from the base ends of the bases 18a, 19a to the distal end side.
The tips of the finger hooks 18b, 19b are connected to the bases 18a, 19a.
Disconnected from That is, a part of the handle portions 18, 19 is cut off. A guide groove 2 is provided on the outer surface of each base 18a, 19a on the distal end side of the finger hooks 18b, 19b.
1a and 21b are respectively recessed. Each guide groove 21
The leading ends of the finger hooks 18b and 19b are engaged with a and 21b. As shown in FIG. 3, a plurality of concave grooves (thin portions) 20 are formed at equal intervals on the outer surfaces of the finger hooks 18b and 19b of the handles 18 and 19. And this groove 20
The finger hooks 18b and 19b corresponding to are thin.

Next, the operation of the scissors constructed as described above will be described below. First, when the handle portions 18 and 19 are immersed in hot water for a predetermined time and warmed, the temperature is changed to a glass transition region temperature (60 ° C. to 100 ° C.). Then, both handle parts 18 and 19 are softened, respectively. When softened, the shapes of the handle portions 18 and 19 are deformed according to the size of the finger and the number of fingers passed through the finger hooks 18b and 19b. For example, as shown by a two-dot chain line in FIG.
8b and 19b are bent and deformed so that the right finger hook 18b is smaller than the left finger hook 19b. And
The tips of the finger hooks 18b and 19b are connected to the respective guide grooves 21.
a, 21b. In addition, as shown by a two-dot chain line in FIG. 2, by bending the vicinity of the center of the base portions 18a, 19a, the entire handle portions 18, 19 are deformed into a side-shape.

The finger hooks 18 of the handles 18, 19
When bending b and 19b, the bending is performed using the groove 20 as a guide. Moreover, the finger portions 18 b and 19 are formed by the groove portions 20.
Since b is thin, the finger hooks 18b and 19b can be easily deformed even by a weak child without applying force. After bending the handle portions 18, 19, the handle portions 18, 19
19 is immersed in cold water and cooled from the glass transition region temperature to a predetermined temperature or lower (40 ° C. or lower).
19 cures. By this hardening, the handle portions 18, 1
9 is kept in the shape after the bending deformation. If it is desired to deform the handle portions 18 and 19 again, the handle portions 18 and 19 can be deformed as many times as described above.

This embodiment has the following effects (1) to (5). (1) The handle portions 18 and 19 can be freely deformed according to the size of the finger and the number of fingers to be put in the finger hooks 18b and 19b. Therefore, the handle portions 18 and 19 are fitted to each finger, and the fingers do not hurt even if scissors are used for a long time. Therefore, usability of the scissors can be improved.

(2) Since the handle portions 18 and 19 are partially separated, the finger hooks 18b and 19b can be deformed by shifting the tip positions of the finger hooks 18b and 19b. Therefore, the deformed handle portions 18 and 19 can be deformed into completely different shapes. That is, the handle portions 18 and 19 can be deformed into any shape, and the degree of deformation of the handle portions 18 and 19 is greatly increased.

(3) Grooves 20 are formed on the outer surfaces of the handle portions 18 and 19, and the finger hooks 18 corresponding to the grooves 20 are formed.
Since b and 19b are thin, even a weak person such as a child can easily bend.

(4) Since the plurality of grooves 20 are formed at equal intervals, it can be used as a guide when bending the finger hooks 18b and 19b. When the finger hooks 18b and 19b are deformed into the same shape, the finger hooks 18b and 19b can be bent and deformed into the same shape by bending the groove 20 as a guide.

(5) Base 18 of each handle portion 18, 19
a and 19a are formed with guide grooves 21a and 21b,
When the finger hooks 18b and 19b are bent and deformed, their tips are engaged with the guide grooves 21a and 21b. Therefore, the tip ends of the finger hooks 18b and 19b can be easily positioned. Therefore, the work of deforming the finger hooks 18b and 19b can be performed smoothly.

(Second Embodiment) Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. In this embodiment, the same components as those in the first embodiment have the same reference numerals, and a detailed description thereof will be omitted.

As shown in FIG. 4 (a), the bases 18a, 19 of at least one of the handle portions 18, 19 (the right handle portion 18 in FIGS. 4 (a), 4 (b)).
a second finger hooks 18c, 1 having the same configuration as the finger hooks 18b, 19b branched from the handlebars 18 and 19 in the opening direction.
9c may be embodied.

As described above, according to the present embodiment, in addition to the same effects as those of the first embodiment, as shown in FIG.
By bending the second finger hook 18c in the distal direction to form a ring, it is possible to form a finger hook dedicated to the index finger by the second finger hook 18c separately from the finger hook 18b.

(Third Embodiment) Hereinafter, a third embodiment of the present invention will be described with reference to the drawings. In the present embodiment, the same components as those in the second embodiment have the same reference numerals, and a detailed description thereof will be omitted.

As shown in FIG. 5A, the bases 18a and 19a of at least one of the handle portions 18 and 19 (the right handle 18 in FIGS. 5A and 5B).
May be embodied as scissors having rings 18d and 19d.

As described above, according to this embodiment, in addition to the same effects as those of the first embodiment, as shown in FIG.
Since the index finger can be passed through the ring 18d, a scissor having a finger hook dedicated to the index finger can be realized.

(Fourth Embodiment) Hereinafter, a fourth embodiment of the present invention will be described with reference to the drawings. In this embodiment, the same components as those in the third embodiment have the same reference numerals, and a detailed description thereof will be omitted.

As shown in FIGS. 6A and 6B, at least one of the handle portions 18, 1 in the haircut scissors.
9 (the right handle 18 in FIGS. 6 (a) and 6 (b)) from the finger hooks 18b and 19b to the respective handles 18, 1
9 may be embodied as scissors having second finger hooks 18c, 19c branched in the closing direction.

As described above, according to the present embodiment, in addition to the same effects as in the first embodiment, as shown in FIG.
By bending the second finger hook 18c in the direction in which the handles 18 and 19 are opened, a little finger hook that supports the little finger by the second finger hook 18c can be formed.

(Fifth Embodiment) Hereinafter, a fifth embodiment of the present invention will be described with reference to the drawings. In the present embodiment, the same components as those in the fourth embodiment have the same reference numerals, and a detailed description thereof will be omitted.

As shown in FIGS. 7 (a), 7 (b) and 7 (c), at least one of the handle portions 18 and 19 (in FIGS. 7 (a), 7 (b) and 7 (c), Each of the handles 18, 18 from the finger hooks 18b, 19b of the handle 18)
It may be embodied as scissors having the second finger hooks 18c and 19c branched in the closing direction of 19.

As described above, according to the present embodiment, in addition to the same effects as those of the first embodiment, as shown in FIG.
By bending the second finger hook 18c in the opening direction of the handles 18 and 19, a little finger hook that supports the little finger with the second finger hook 18c can be formed.

The second finger hook 18c is connected to each handle 1
8 and 19 are bent so as to be sandwiched between the bases 18a and 19a. As described above, according to the present embodiment, in addition to the same effects as those of the first embodiment, as shown in FIG. 7C, the second finger hook portion 18c sandwiched between the handles 18, 19 allows When the handles 18 and 19 are closed, the collision at the time of closing is buffered, and when the handles are opened, they are urged in the opening direction.

The present invention may be configured as follows in addition to the above embodiments. (A) In the above embodiment, the tips of the finger hooks 18b and 19b are cut off, but the finger hooks 18b and 19b may be cut off in the middle. For example, as shown in FIG. 8A, the finger hooks 18b and 19b may be cut off near their base ends. Also, the base portion 18 is not cut off without separating a part of the handle portions 18 and 19.
The handle portions 18 and 19 may be formed so that the a and 19a and the finger hook portions 18b and 19b are connected.

(B) In the above embodiment, the finger hooks 18b,
Although a plurality of grooves 20 are formed on the outer surface of 19b, the grooves 20 may be omitted and a plurality of grooves 20 may be formed on the inner surfaces of finger hooks 18b and 19b. Also, the handle part 18, 1
It is also possible to form a plurality of grooves 20 on both inner and outer side surfaces of 9.

(C) In the above embodiment, each handle 1
8 and 19, the scissors have one finger hook portion 18b, 19b. For example, as shown in FIG. 8B, at least one of the handle portions 18, 19 (see FIG. 8C). May be embodied as scissors having two or more finger hooks 18b, 19b on the left handle 19).

(D) In the above embodiment, both handle portions 1
Although a part of the handle parts 8 and 19 is cut off, a part of one of the handle parts 18 and 19 may be cut off as shown in FIG. As shown in FIG.
After deforming 19, the cut-off portions may be clearly separated.

(E) In the above-described embodiment, the groove portion 20 has a concave shape. However, other than this shape, the groove portion 20 can be changed to a V shape or a wave shape. Also, the handle parts 18, 19
The groove 20 may be formed not only on the finger hooks 18b and 19b but also on the bases 18a and 19a.

(F) Any kind of scissors such as children's scissors, universal scissors, pruning scissors, office scissors, barber scissors, etc. (G) In the above embodiment, the finger hooks 18b and 19b are deformed to different sizes, but may be deformed to the same size. Further, each of the finger hooks 18b and 19b may be deformed into an arbitrary shape. Furthermore, if the finger hooks 18b, 19b are too large to fit the fingers of a child or the like, the finger hooks 18b, 19b
With b softened, the tips of the finger hooks 18b and 19b may be cut off. By doing so, the finger hooks 18b, 1
9b can be reliably reduced.

Next, technical ideas other than the claims that can be understood from the above embodiments will be described together with their effects. (A) The scissors according to claim 3, wherein a plurality of the thin portions are provided, and the thin portions are arranged at equal intervals.
According to this configuration, when it is desired to deform both handle portions in the same manner, the handle portions can be deformed by using the position of the thin portion corresponding to the deformed portion as a guide. Therefore, the accuracy when both handle portions are deformed to the same shape is high.

[0040]

According to the first aspect of the present invention, since the shape memory resin is used for the finger hook main body, the handle can be deformed into an arbitrary shape according to the size of the finger. The usability of the scissors can be improved.

According to the invention of claim 2, according to claim 1,
In addition to the effects of the invention described in (1), the handle portion can be significantly deformed. According to the third aspect of the invention, in addition to the effects of the first or second aspect, the thickness of the handle portion corresponding to the thin portion is reduced, so that the handle portion can be easily deformed. it can.

According to the fourth aspect of the present invention, the first aspect is provided.
In addition to the effects of the inventions described in 3 to 3, the operability of the handle portion can be improved by deforming one or more finger hook portions branched from the handle portion.

[Brief description of the drawings]

FIG. 1 is a front view of scissors showing a first embodiment of the present invention.

FIG. 2 is a right side view of the scissors.

FIG. 3 is a perspective view showing only a handle portion of the scissors.

FIG. 4 shows the second embodiment, and (a) and (b) are partially cutaway front views of scissors.

FIG. 5 shows the third embodiment, and (a) and (b) are partially cutaway front views of scissors.

FIG. 6 shows the fourth embodiment, and (a) and (b) are partially cutaway front views of scissors.

FIGS. 7A to 7C are front views of a pair of scissors with a partially cutaway view, showing a fifth embodiment;

FIG. 8 shows another embodiment, and (a) to (c) are partially cutaway front views of scissors.

[Description of Signs] 11, 12: Scissors, 18, 19: Handle, 20: Groove

Claims (4)

[Claims] 1. A scissors comprising a pair of scissor pieces rotatably supported, each having a handle end attached to a base end of the pair of scissor pieces, and the handle section made of a shape memory resin. 2. The scissors according to claim 1, wherein said handle portion is partially cut off. 3. The scissors according to claim 1, wherein said handle portion has a thin portion in at least a part thereof. 4. The scissors according to claim 1, wherein said handle has one or more branched finger hooks.