A spring-loaded pair of scissors that can be transformed into four different shapes for people with upper limb disabilities

Abstract

To provide a spring-loaded stick-type scissors that can be changed into four different modes: carry mode, power grip mode, finger grip mode, and table mode. [Solution] Stick-type scissors with a structure that allows the outer half of the grip part to be rotated (rotating handle), and one of the grips is equipped with a rotating spring, allowing one pair of scissors to be changed into four different forms: carry mode (when both rotating handles are parallel to the blades of the scissors and the springs are folded down so that they can be carried), power grip mode (when both rotating handles are parallel to the blades of the scissors and the springs are raised so that they can be used as scissors), finger grip mode (when only one of the rotating handles is rotated 90 degrees, a state in which fingers can be hooked on the rotating handle and used to cut), and table mode (when both rotating handles are rotated 90 degrees, the scissors are placed on a table and fingers can be hooked on the rotating handles and used to push through).

Description

[Technical field]

[0001] The present invention aims to create a pair of spring-loaded scissors that can be changed into four different modes: carry mode, power grip mode, finger grip mode, and table mode. [Background technology]

[0002] Patients with upper limb dysfunction, such as those suffering from stroke, head injury, spinal cord disease, cerebral palsy, and dystonia, are often unable to use ordinary scissors due to motor disorders and muscle weakness.

[0003] JP 2006-102280 A discloses scissors with a universal design that can be used by people with disabilities such as the elderly and people with disabilities, but the rings are large and difficult to carry, and they can only be used while placed on the floor. Another pair of scissors with a universal design is reported in JP 2004-154206 A, but it enhances safety by allowing cutting with a protective cover attached to the blade, and is not designed for use by people with disabilities. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2006-102280 A [Patent Document 2] JP 2004-154206 A Summary of the Invention [Problem to be solved by the invention]

[0005] When there is functional impairment of the upper limbs, it is often difficult to insert the fingers into the loop of the handle of normal scissors and open the scissors. If the gripping motion is possible, spring-loaded stick-type scissors are an option. When using scissors with a power grip, which is gripped by bending the MP joint of the fingers, the grip of commercially available scissors is often thin and difficult to grip well, so the grip needs to be made thicker. If you cannot grip with a power grip but can pinch with your fingers, you can use a finger grip, which pinches your fingers parallel to the grip of the scissors, but with commercially available scissors, only one finger can be placed on the grip part and you cannot apply force. In order to fit two or more fingers to the grip, the grip needs to be at a right angle to the blade of the scissors. If you cannot use either a power grip or finger grip but can push objects with the movement of your wrist or elbow joint, you can use the scissors by placing them on a table and pushing the grip, but the grip of commercially available scissors is thin and they fall over easily. Also, the grip used for pushing is thin, so you can only fit one finger on it. [Means for solving the problem]

[0006] This invention solves these problems by designing a design that incorporates the features of (1) to (5), namely: (1) a thick grip that is easy to hold in power grip mode; (2) a rotating handle that can rotate the outer part of the grip 90 degrees relative to the blades of the scissors and is long enough to accommodate two or more fingers; (3) a rotating handle with a cylindrical contact surface that allows the lower handle to move smoothly on the table when pushing in table mode; (4) a rotating spring made of highly elastic plastic and installed in the center of one of the grips; and (5) a total design that can be easily changed into four different modes: carry mode, power grip mode, finger grip mode, and table mode. Effect of the Invention

[0007] By using the spring-loaded scissors of this invention, it is possible that patients with upper limb dysfunction can use scissors. In addition, the design features are expected to have the following effects (1) to (5). (1) People with upper limb dysfunction often cannot hold the thin grip of regular scissors due to motor disabilities or muscle weakness. By designing the grip width to be wider, it becomes easier to hold and apply force when using a power grip. (2) When using a finger grip, where the fingers are parallel to the grip of the scissors and the scissors are pinched together, commercially available scissors only allow one finger to be placed on the grip, making it difficult to apply force. By designing the outer part of the grip to be able to rotate 90 degrees relative to the blade of the scissors and to be long enough to allow two or more fingers to be placed on the grip, it becomes easier to grip and apply force when using a finger grip. (3) The contact surface of the handle that is facing down when using the table mode is designed to be cylindrical, which helps the rotating handle move smoothly across the table when pushed. (4) By making the rotating spring installed in the center of one of the grips out of highly elastic plastic, it is possible to obtain the same spring effect as a metal spring. (5) The total design allows the device to be easily transformed into four different modes: carry mode, power grip mode, finger grip mode, and table mode, making it a convenient and compact product that can be easily carried in a pencil case or other portable item. [Brief description of the drawings]

[0008] [Figure 1] This is an overall view of the spring-loaded scissors of the present invention, which can be changed into four different forms: carry mode, power grip mode, finger grip mode, and table mode. [Diagram 2] FIG. 1 is an exploded view of the power grip mode. [Diagram 3] This is the design drawing for the power grip mode. [Figure 4] FIG. 13 is a schematic diagram showing a change in the position of a spring. [Diagram 5]11A and 11B are schematic diagrams illustrating a change in the position of a rotary handle. [Figure 6] These are the four ways to actually hold the scissors: carry mode, power grip mode, finger grip mode, and table mode. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Explain how to use it. When carrying it in a pencil case, etc., set the spring to the position along the spring grip and set it to carry mode. When using in power grip mode, move the spring to the spring state position, hold it as if holding pliers, and use it by flexing and extending the MP joints of the fingers. When it is not possible to use it in power grip mode due to upper limb dysfunction, transform it into finger grip mode, which rotates the rotating handle of the grip without the spring by 90 degrees, and use it by hooking two or more fingers on the rotating handle and pinching it. If you cannot use either power grip or finger grip, but can push objects with the movement of your wrist or elbow joint, transform it into table mode, which rotates both rotating handles by 90 degrees, so that you can place it on a table and push the rotating handles. EXAMPLES

[0010] An embodiment will be described below with reference to the attached drawings. Each part was designed as a prototype using 3D-CAD and printed using a 3D printer. Design: 1. Scissor blades x 2 2. Spring grips x 2 3. Grips x 2 4. Rotating handles x 2 5. Spring and spring fixing screw 6. Central screw 7. Grip fixing screws x 4 8. Rotating handle fixing screws x 2 5 parts (each part was printed in half and fixed with screws) and 7 screws were designed to be assembled. The grip was designed to be 65 mm long x 15 mm wide, and the rotating handle was designed to be 50 mm long x 15 mm wide in cylindrical shape. The spring was slightly curved with a length that allows the scissors blades to open 30 degrees. The grip with spring was designed to follow the shape of the spring, and a stopper was designed to stop it at a 25 degree open position. 3D printer output results: Print time was 60 minutes per piece, running costs were 40 yen per piece, and weight was 30 g per piece (excluding pen). [Explanation of symbols]

[0011] 1 Scissor Blades - 1 2 Scissor Blades-2 3 Central screw 4 Spring-loaded grip-1 5. Spring-loaded grip-2 6 Spring fixing screw 7. Spring 8 Grip fixing screw-1 9 Grip fixing screw-2 10 Rotating Handle-1 11 Rotating handle fixing screw-1 12 Grip-1 13 Grip-2 14 Grip fixing screw-3 15 Grip fixing screw-4 16 Rotating Handle-2 17 Rotating handle fixing screw-2

Claims

1. A pair of spring-loaded scissors that can be changed into four different modes: carry mode, power grip mode, finger grip mode, and table mode.

2. The rotating handle of spring-loaded scissors according to claim 1, wherein the outer half of the grip can rotate 360 ​​degrees.

3. The rotating handle of the spring-loaded scissors according to claim 1 is thick and straight, making it easy to grip in power grip mode and not digging into the fingers even when gripped with strong force.

4. The rotating handle of the spring-loaded scissors according to claim 1, which is long enough to allow two fingers to be securely hooked even when the outer half is rotated 90 degrees and the fingers are hooked in the handle in finger grip mode.

5. The rotating handle of the spring-loaded scissors according to claim 1 has a semi-cylindrical shape that can move smoothly across the table contact surface when pushing and cutting in table mode.

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