JP7250263B2 - grip, shape of grip - Google Patents

Description

TECHNICAL FIELD The present invention relates to a shape of a grip to be attached to a handle of a tool or the like having a rod-like handle. Tools having a rod-shaped handle to which the method is applied include hammers, hammers, saws, and the like, and also include cooking utensils such as kitchen knives, knives, and frying pans. Furthermore, it can also be applied to a pair of handles that are held with both hands, such as a handle for a bicycle or a push handle for a wheelchair.

Grips themselves, which are used by putting them on handles or handles of various tools, have been in widespread use for some time, and grips for handlebars of bicycles in particular are widely distributed as individual parts. However, these grips are basically designed to be gripped with all five fingers of the hand. Specifically, the four fingers from the index finger to the little finger are placed side by side without being separated from each other, and all the joints of the DIP joint (first joint), PIP joint (second joint), and MP joint (third joint) The thumb is made to bend the IP joint (first joint) and the MP joint (second joint) from the opposite side.

When you grip an object with your hand, the flexors of your hand, arm, and chest work. In addition, when moving a hand-held tool or cooking utensil, it is necessary to work not only the flexor muscles but also the extensor muscles of the arms and the back in a coordinated manner. However, when you hold a general object like a traditional grip, you mainly use the flexor muscles of the hand and arm: flexor digiti deep, adductor digitorum, flexor digitorum brevis, extensor digitorum brevis, and little finger brevis. The flexor, abductor little finger, flexor digitorum deep, flexor digitorum superficialis, brachioradialis, and biceps brachii muscles contract. On the other hand, the dorsal interosseous muscle, extensor thumb brevis, extensor pollicis longus, extensor digitorum digitorum, triceps brachii, teres major, teres minor, deltoid, upper trapezius, etc. The extensor muscles involved become less active.

In this case, the more force is applied to the gripping hand, the stronger the contraction of the flexor muscles on the inside of the arm, causing the entire arm to internally rotate, causing the elbow to move away from the midline of the body, limiting the range of motion of the joint. be done. Therefore, for example, when a tool such as a hammer is swung up or down, or when a cooking utensil such as a kitchen knife or a frying pan is pushed back and forth, the moving direction or trajectory of the object does not match the direction of the force. There was a problem that the axis of motion was not fixed, the accuracy of work (operability) was lacking, and the force could not be exerted efficiently. In addition, when the weight of the object to be grasped is large, or when a work with a large load is performed, the burden on the flexor muscles of the hands and arms increases, which accelerates fatigue.

By the way, when the DIP joint (first joint) and the PIP joint (second joint) of the index finger are inwardly flexed and the MP joint (third joint) is outwardly flexed, the index finger extensor muscle contracts. The extensor finger is an extensor muscle that literally extends the index finger, originating from the dorsal side between the forearm periosteum, the distal dorsal surface of the ulna, and stopping at the tip of the index finger. There is a digitorum extensor muscle that externally flexes all fingers, but when the other four fingers are flexed, the index finger extensor muscle becomes the main muscle of movement. In addition, the contraction of the extensor finger muscle works in conjunction with the brachioradialis muscle, which is a flexor muscle under the control of the same radial nerve, and the triceps brachii muscle, which is an extensor muscle, and acts to bend the elbow joint.

Therefore, if only the index finger is bent outward while gripping an object, a kinetic chain is generated in which not only the flexor muscles of the hand and arm but also the extensor muscles are recruited when moving the arm while gripping the object. . In particular, when the index finger is outwardly flexed away from the middle finger and away from the MP joint, rather than simply being outwardly flexed , the extensor digitorum muscle contracts more and the kinetic chain is strengthened. Not only does this increase the amount of muscle you can use to perform the same movement, but it also allows your flexors and extensors to work in a balanced manner. As a result, the internal rotation of the arm is suppressed, and the elbow does not easily move away from the midline of the body even when the force is applied to the fingers. work can be performed accurately. In addition, by using not only the flexor muscle group but also the extensor muscle group, the muscle output as a whole is increased, and fatigue becomes less likely.

In addition, as described above, when the thumb is inwardly bent so as to wrap around the grip and gripped, the flexor muscles such as the flexor thumb brevis muscle, the thumb adductor muscle, and the thumb opposite muscle contract, and the brachioradialis muscle, which is the flexor muscle group of the arm, contracts. , the biceps brachii, etc. contract through the kinetic chain, causing the entire arm to internally rotate, and a force acts in the direction in which the elbow moves away from the midline of the body. On the other hand, when the thumb is extended forward in the axial direction of the grip and pressed against the upper surface of the grip and fixed, the flexor muscles for inward bending of the thumb do not contract. Therefore, the kinetic chain of the flexor muscles of the arm does not occur, and the internal rotation of the entire arm and the opening of the elbow are suppressed. improve sexuality. In addition, if the thumb is extended forward and flexed from the MP joint, the flexor muscles on the upper surface of the forearm, such as the flexor carpi radialis, can be contracted more strongly when bending the elbow, so heavy tools can be raised. Increases muscle power output when exercising.

Various shapes and structures have been proposed for grips applied to rod-shaped handles. None exist with a configuration that flexes the joint inward and flexes the MP joint externally . For example, the ski pole grips disclosed in Patent Documents 1 to 4 have a shape that separates the index finger and the middle finger when gripped. It is a shape for flexing all the joints including inwardly to grasp the grip, and it is not a configuration for simultaneously working the flexor and extensor groups of the hand and arm when gripping. The grip of the tennis racket disclosed in Patent Document 5 and the grip of the walking assistance pole disclosed in Patent Document 6 also have a shape that separates the index finger and the middle finger when gripped. It is not a configuration in which the MP joint of the index finger is outwardly bent .
Japanese Patent Publication No. 2001-502932 Japanese Patent Publication No. 2003-530170 Japanese Patent Publication No. 2008-522678 Japanese Patent Publication No. 2008-529566 Japanese Patent Publication No. 8-502677 Japanese Unexamined Patent Application Publication No. 2016-30166

INDUSTRIAL APPLICABILITY The present invention can be attached to a bar-shaped handle such as a tool or cooking utensil, or applied to the structure of a bar-shaped handle such as a tool or cooking utensil, so that the tool or cooking utensil can be raised, lowered, or moved back and forth. To provide a grip or its structure capable of assisting movement in a direction, improving work accuracy, improving muscle output, and reducing fatigue.

In order to solve the above-mentioned problems, the grip described in claim 1 of the present invention is a grip to be attached to and gripped by a handle of a tool or the like having a bar-shaped handle, wherein the handle is inserted. A substantially cylindrical grip body having a coaxial insertion hole at the front end thereof, and a rod-shaped lower protrusion provided from the lower surface near the front end of the grip body so as to protrude obliquely forward and downward like a trigger of a gun. and the lower projection is fixed by hooking the ventral side of the first joint of the index finger to the front surface on the axis of the lower projection, and the third joint of the index finger is brought into close contact with the side surface of the grip body, When the rear part of the lower protrusion of the grip body is gripped from below with the middle finger, the ring finger, and the little finger, the lower protrusion completely separates the index finger and the middle finger and bends the first and second joints of the index finger inward. and having a shape capable of holding the third joint in a laterally bent state.

Further, the grip according to claim 2 is the grip described in claim 1, wherein the upper surface of the grip body is continuously increased toward the front end near the front end. an upper protrusion having an axially inclined surface formed thereon, the upper protrusion extending the thumb in the axial direction of the grip body and causing the pad of the fingertip of the thumb to abut against the inclined surface; When gripping the grip body with the palm side of the second joint of the thumb in close contact with the top surface of the grip body , both the first joint and the second joint of the thumb contacting the inclined surface are outwardly bent. It is characterized by having a shape that can be held in place .

And the invention described in claim 3 is a kitchen knife other than a hammer tool, a saw, an electric tool, a frying pan, a one-handed pan, and a sashimi knife having a handle in the shape of a grip according to either claim 1 or claim 2. kitchen utensils such as knives, walking sticks, or ski poles.

The grip according to the present invention is provided with an insertion hole corresponding to the cross-sectional shape of the handle to be attached and capable of securely fixing a tool or the like during use. Any material can be used for the grip, and silicon rubber, plastic, wood, or the like can be integrally molded. In addition, the grip body is almost cylindrical, but in order to fit the hand and prevent slipping, the cross section is slightly flattened in the left and right direction, and the cross section is slightly tapered from the front end to the rear end. , the middle finger, the ring finger, and the little finger may be provided with recesses corresponding to the pads of the fingers, or fine non-slip unevenness may be provided on the surface. It should be noted that the present invention does not exclude forming the handle portion of the tool itself into the shape of the grip.

Furthermore, the grip according to the present invention can also be applied to a pair of handles that are held with both hands, such as bicycle handles and wheelchair push handles. When applied to a bicycle handlebar, the grip is mounted on the handlebar with its upper surface inclined toward the user's shoulder. Moreover, when applying to the push hand handle of the wheelchair, it is similar to the case of attaching to a tool or the like.

The grip according to the present invention has the following effects.
(1) When raising or lowering a tool, etc., or moving it back and forth, the direction of arm force matches the direction and trajectory of movement, and the range of motion of the joints increases, so work can be performed accurately. .
(2) Both the flexor and extensor muscles work to raise and lower tools, and to move them back and forth. can be used as intended.
(3) Due to the effects of (1) and (2), the burden on the muscles is reduced, and the fatigue of the hands and arms due to work is suppressed.

An embodiment of the present invention will be described below with reference to the drawings. 1 is a perspective view showing one embodiment of a grip according to the present invention, FIG. 2 is a left side view, FIG. 3 is a top view, FIG. 4 is a bottom view, FIG. 5 is a front view, and FIG. 6 is a rear view. be. The grip 1 is integrally molded of silicon rubber, and has a substantially cylindrical grip body 10 with a cross section that is slightly flattened in the left-right direction and that gradually tapers in cross section from the front end to the rear end. A coaxial insertion hole 11 into which the hand S is inserted and fitted is provided. In this embodiment, the insertion hole 11 is a blind tube hole having a depth that allows the handle S to be securely inserted and fixed, but may be a through hole leading to the rear end side as necessary.

The grip 1 has a lower protrusion 12 on the lower surface of the grip body 10 near the front end. The lower protrusion 12 is gently raised from the lower surface of the grip body 10 and protrudes obliquely forward, and the front end side thereof forms a lower protrusion front surface 12a capable of inward bending by bringing the abdomen of the DIP joint of the index finger into close contact. are provided. In addition, the lower surface of the grip body 10 on the rear side of the lower projection 12 has a shape that allows the ventral sides of the MP joint, PIP joint, and DIP joint of the three fingers from the middle finger to the little finger to be brought into close contact with each other and bent inward.

The grip 1 is further provided with an axially inclined surface 13a near the front end of the upper surface of the grip body, the inclination angle of which is continuously increased with the height of the upper surface of the grip body toward the front end, and the inclined surface 13a is curved upward. An upper projection 13 is provided. The upper protrusion 13 is provided at a position where the abdomen of the IP joint of the thumb abuts against the inclined surface 13a when the grip 1 is gripped by extending the thumb in the axial direction of the grip body 10, and the abdomen of the thumb is displaced to the left and right. The surface of the inclined surface 13a is slightly recessed so that it does not fall. When the grip 1 is gripped with force while the thumb is pressed against the inclined surface 13a, the thumb is curved upward along the inclined surface, and the IP joint and the MP joint of the thumb are outwardly bent .

In this embodiment, the uppermost part of the upper projection 13 projects further forward from the front end of the grip body 10, but such projection is not essential. Other configurations of the grip 1 not specifically mentioned in this specification are optional as long as the orientation is as shown in FIGS. 7 and 8, which will be described later.

FIG. 7 is a schematic side view of the grip 1 of the present embodiment with a handle S attached to it, viewed from the left side of the body, and FIG. 8 is a schematic bottom view of the same state.

As shown in both figures, when the abdomen of the thumb is applied to the inclined surface 13a of the upper protrusion 13 and the grip 1 is gripped with the other four fingers, the lower protrusion 12 is sandwiched between the index finger and the middle finger. The grip body 10 is gripped with three fingers from the to the little finger. At this time, the index finger and the middle finger are completely separated by the lower projection 12, and since the lower projection 12 protrudes obliquely forward, the first joint (DIP joint) of the index finger hangs on the front surface 12a of the lower projection and bends inward. , the second joint (PIP joint) is inwardly bent in a manner of wrapping around the side surface of the lower projection 12, while the third joint (MP joint) is slightly outwardly bent.

By flexing the index finger, the extensor muscles of the index finger contract, creating a kinetic chain that recruits not only the flexor muscles of the hand and arm, but also the extensor muscles. In particular, since the index finger is completely separated forward from the middle finger by the lower projection 12, the contraction of the index finger extensor muscle is greater and the kinetic chain is strengthened. As a result, the internal rotation of the arm is suppressed, and the elbow does not easily move away from the midline of the body even when the force is applied to the fingers. work can be performed accurately. In addition, by using not only the flexor muscle group but also the extensor muscle group, the muscle output as a whole is increased, and fatigue can be suppressed.

The lower projection 12 has such a shape and thickness that when the index finger is put thereon, the first joint (DIP joint) abuts against the front surface 12a of the lower projection and bends inward. The reason is that if the shape and thickness of the lower protrusion is changed so that the tip of the index finger wraps around to the opposite side of the lower protrusion 12 and the first joint (DIP joint) exceeds the front surface 12a of the lower protrusion, the first joint ( DIP joint), not only the second joint (PIP joint), but also the third joint (MP joint), contracting the index finger extensor muscle. This is because the arm rotates inwardly due to the force of the group, and the effects of the present invention are not exhibited.

On the other hand, as for the thumb, both the first joint (IP joint) and the second joint (MP joint) extend along the curved surface of the inclined surface 13a of the upper projection 13, and the more force is applied to the thumb, the more It becomes a shape that bends outward. Then, since the flexor muscles that flex the thumb inward do not contract, the kinetic chain of the flexor muscles of the arm does not occur, and the internal rotation of the entire arm and the opening of the elbow are suppressed. Therefore, it is possible to improve the accuracy of swinging up, swinging down, and movement in the front-rear direction, which are main actions when tools and cooking utensils are used. In addition, when bending the elbow in this state, the flexor muscles on the upper surface of the forearm, such as the flexor carpi radialis, can be contracted more strongly than when the thumb is flexed inward, making it easier to lift heavy tools. It also improves muscle output.

Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not necessarily limited to the above-described configurations, and may be modified as appropriate within the scope of achieving the objects and effects of the present invention. As long as they can be modified and are within the scope of the technical idea of the present invention, they belong to the technical scope of the present invention.

INDUSTRIAL APPLICABILITY The grip according to the present invention can be applied to general tools and cooking utensils that have a bar-shaped handle and are operated by grasping the handle with one hand to swing it up and down, or to move it in the front-rear direction. Specifically, in addition to impact tools such as hammers and hammers, push-pull tools such as saws, frying pans, one-handed pots, and cooking utensils such as kitchen knives and knives (excluding sashimi knives), they are relatively heavy and require constant arm strength. It is suitable for application to grips such as electric tools that need to be held and operated by inserting. It can also be applied to a pair of grips that need to be gripped with a strong force and operated with the whole arm as necessary, such as a handle grip for a bicycle or a push hand grip for a wheelchair. Furthermore, it is suitable for application to a cane for assisting walking or a ski pole having a handle provided at the upper end. This is because when using a cane or pole, if the arm rotates internally when force is applied, the tip of the stick moves away from the axis of the body and cannot play the role of supporting the body weight. This is because the effect of preventing internal rotation is particularly effective.

Perspective view of the grip according to the embodiment Left side view of the grip according to the embodiment Top view of the grip according to the embodiment Bottom view of the grip according to the embodiment Front view of the grip according to the embodiment Rear view of the grip according to the embodiment Left side view of the grip according to the embodiment in use The bottom view of the usage state of the grip which concerns on embodiment

S handle 1 grip 10 grip body 11 insertion hole 12 lower protrusion 12a lower protrusion front surface 13 upper protrusion 13a inclined surface

Claims (3)

A grip to be attached to and held by a handle of a tool or the like having a bar-shaped handle, the grip body having a substantially cylindrical grip body having a coaxial insertion hole at the front end into which the handle is inserted and fitted; and a rod-shaped lower projection provided to protrude obliquely forward and downward like a trigger of a gun from the lower surface near the front end of the grip body, and the lower projection extends the belly side of the first joint of the index finger to the lower part. The third joint of the index finger is attached to the side surface of the grip body by hooking it on the front surface on the axis of the protrusion and fixed, and the back of the lower protrusion of the grip body is gripped from below with the middle finger, the ring finger and the little finger. In this case, the lower protrusion has a shape capable of holding the index finger and the middle finger completely apart, inwardly bending the first and second joints of the index finger, and outwardly bending the third joint. and grip. Near the front end of the upper surface of the grip body, there is further provided an upper projection provided with an axially inclined surface formed by continuously increasing the height of the upper surface of the grip body toward the front end, the upper projection being , the thumb is extended in the axial direction of the grip body, the belly side of the fingertip of the thumb is brought into contact with the inclined surface, and the palm side of the second joint of the thumb is brought into close contact with the upper surface of the grip body to hold the grip body. 2. A grip according to claim 1, characterized by having a shape capable of holding both the first joint and the second joint of the thumb in contact with said inclined surface in a state of being outwardly bent when gripped .
Percussion tools, saws, power tools, cooking utensils such as kitchen knives excluding frying pans, pans, and sashimi knives, sticks, or skis having a handle in the shape of the grip according to claim 1 or claim 2 stock.

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