JP5277147B2 - 緩衝 buffer structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shock absorber of scissors for gardening or the like, which make little shock even when they are closed strongly and are gentle to the hands. <P>SOLUTION: A buffer member 6 is projected towards a holding handle of the other side in the inner surface of a holding handle 4. When blades are closed, the buffer member 6 contacts the other holding handle and demonstrates buffer effect. The buffer member 6 is made of flexible materials such as polyurethane resin and synthetic rubber which can make elastic deformation and is shape of a cap which fits the projection 7 projected in the inner side surface of the holding handle 4 and a fitting hole 8 of the buffer member extends axially to be longer than the length of the projection 7 and forms an air pool 9 ahead of the projection. The buffer member 6 is pressed axially when blade bodies are closed strongly and the buffer member 6 touches a part of the other holding handle, shock is absorbed by deformation of the buffer member itself and compressive deformation of the air pool 9. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  This invention cuts an object to be cut by opening / closing operation of a grip handle that pivotally supports a pair of blade bodies and is attached to the base of the blade body, like a pruning shear for gardening, It is an invention relating to a shock absorbing structure for a collar in which a cushioning member is projected toward a gripping handle, and when the blade body is closed, the cushioning member comes into contact with a part of the inner surface of the other gripping handle and exhibits a cushioning effect. .

In gardening pruning shears or the like, a buffer member is widely projected on the inner surface of the grip handle toward the other grip handle for the purpose of reducing the impact when the blade body is opened and closed.
Patent Document 1 discloses a concept in which impact is absorbed by disposing a contact at a position facing the inner surface of the gripping handle in a state in which the protruding dimension can be adjusted, and using the gripping handle as a soft plastic or rubber. .
Japanese Patent Laid-Open No. 2004-228561 discloses a concept of cushioning an impact by disposing an elastic portion at a location acting as a stopper on the opposite inner side surface of the gripping handle and forming a two-stage contact elastic portion having different elasticity. .
Patent Document 3 discloses a concept of disposing a buffer member made of a soft elastic material such as rubber or silicon resin at a position facing the base end of the gripping handle.

Japanese Patent Publication No. 07-45166 Utility Model Registration No. 3123343 JP 2008-43578 A

The invention disclosed in Patent Document 1 is an idea that the gripping handle absorbs the impact of collision of the hits 4 and 4, which causes a problem in the strength of the gripping handle and does not cause a buffering action to be performed.
The inventions described in Patent Documents 2 and 3 absorb shocks due to the opening and closing of the blade body with the buffer body (contact elastic portion), but absorb the shock by deformation of the buffer body itself, Due to the difference in the magnitude of the impact and the material of the buffer body, a sufficient buffering effect against the impact in various usage modes is not exhibited.

In view of the above disadvantages of the prior art, the present invention does not rely on shock absorption due to deformation of the cushioning member itself, but uses the principle of an air cushion to provide a cushioning structure for the bag that has a greater cushioning effect and is gentle on the hand and less tiring. It has been realized.
The force for cutting differs depending on the condition of the workpiece, and the impact transmitted to the hand also differs. The present invention intends to realize a wrinkle that exhibits an excellent buffering effect against any impact and is less likely to get tired.

  In the present invention, a pair of blade bodies 1 and 2 are pivotally supported by a shaft 3, and an object to be cut is cut by opening and closing operations of grip handles 4 and 5 formed on the bases of the blade bodies 1 and 2, The buffer member 6 protrudes toward the other gripping handle on the inner surface of 5 and when the blades 4 and 5 are closed, the buffer member 6 comes into contact with a part of the inner surface of the other gripping handle. It relates to a bag that exhibits a buffering effect.

  In order to achieve the above object, the invention according to claim 1 is characterized in that the buffer member 6 is formed of a flexible material such as polyurethane resin or synthetic rubber that can be elastically deformed, and the other grip is provided on the inner surface of the grip handles 4 and 5. Let it be cap shape fitted to the protrusion 7 made to protrude toward the inner surface of the handles 5 and 4. The fitting hole 8 of the buffer member 6 fitted to the protrusion 7 extends in the axial direction longer than the length of the protrusion 7, thereby forming an air reservoir 9 in front of the protrusion 7 in the mounted state. As a result, when the blades 1 and 2 are strongly closed and the buffer member 6 comes into contact with a part of the other gripping handle, the buffer member 6 is pressed in the axial direction, and the shock is absorbed by the compression deformation of the air reservoir 9. It is what you do.

  The buffer member 6 exhibits a buffering effect when formed on any one of the gripping handles 4 and 5, but the invention according to claim 2 is formed at the base of the pair of blade bodies 1 and 2. The cushioning members 6 and 6 are arranged on the same turning locus that is separated from the shaft support position of the blade body by the shaft 3 on both of the gripping handles 4 and 5, respectively, so that the cushioning members are in contact with each other. It is.

  According to the third aspect of the present invention, the buffer members 17 and 17 are arranged on the same inner surface of the pair of gripping handles 4 and 5 on the same rotation trajectory away from the axial support position of the blades 1 and 2, respectively. The buffer members 17 and 17 are positioned within the inner diameter of the coil spring 10 that biases the blade bodies 1 and 2 in the opening direction.

When the object to be cut is cut by firmly grasping the grips 4 and 5, the grips 4 and 5 collide vigorously at the moment when the object to be cut is cut. At this time, according to the first aspect of the present invention, the tip end portion of the buffer member 6 collides with the inner side surface of the grip handle. The shock at this time is absorbed by the compressive deformation of the air reservoir 9 as shown in FIG. 4 in addition to the buffer effect by the elastic deformation of the buffer member 6 itself. That is, the air reservoir 9 functions as an air cushion or an air damper and effectively absorbs the impact force.
Since the force necessary for the deformation of the air reservoir 9 increases rapidly as the volume of the air reservoir decreases, an effective buffering effect is exhibited regardless of whether the impact is due to a relatively small force or a large force. .

It is preferable that the protrusion 7 and the cushioning member 6 projectingly formed on the gripping handles 4 and 5 are fitted so strongly that the cushioning member does not fall off. However, the fitting hole 8 of the protrusion 7 and the buffer member 6 does not have to be in a completely close state, and the internal pressure of the air pocket 9 is increased by pressing the tip of the buffer member 6, and the air is increased to some extent as the internal pressure increases. It is preferable that the amount of leaked air flows into the air reservoir 9 when the pressure is released and the pressure is released.
The air reservoir 9 may be completely sealed. However, when the air reservoir 9 is completely sealed, when the volume of the air reservoir 9 is reduced, the repulsive force increases rapidly, and in some cases, it is felt shocking. However, if air leaks to some extent, the air reservoir 9 can be deformed more greatly, and the buffering effect can be improved.

  According to the second aspect of the present invention, when the pair of blade bodies are closed, the buffer members are brought into contact with each other on both grip handles formed on the base of the blade bodies. Therefore, the buffering effect is improved as a synergistic effect by the two buffering members.

  According to the third aspect of the present invention, since the buffer member 6 is located inside the coil spring 10 that urges the blade body in the opening direction, the buffer member 6 does not stand out in appearance, and the buffer member 6 does not get in the way. Further, the repulsive force generated by the coil spring 10 generated when the blade is closed weakens the impact force and enhances the buffering effect.

FIG. 1 is a front view of the entire scissors with the blade body open, FIG. 2 is a front view of the entire rod with the blade body closed, 3 is a cross-sectional view taken along line III-III in FIG. FIG. 4 is a cross-sectional view taken along the line III-III in FIG. 1, showing a state where the buffer member is deformed by closing the blade body. FIG. 5 is a front view of the entire ridge showing a state in which a blade body showing another embodiment is opened, 6 is a cross-sectional view taken along line VI-VI in FIG. 7 is a cross-sectional view showing a state in which the blade body is closed from the state shown in FIG. FIG. 8 is a cross-sectional view of a fitting hole portion of the grip handle showing a state where the buffer member is separated.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a bag buffer structure according to the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a front view of the entire scissors in a state where the blade body showing the first embodiment is opened, and FIG. 2 is a front view of the entire scissors showing a state where the blade body is closed from the state shown in FIG.

The scissors shown in FIG. 1 and FIG. 2 are scissors mainly used for gardening, in which a pair of blade bodies 1 and 2 are pivotally supported by a shaft 3, and a sharp cutting blade 1a ahead of the shaft support position, 2a is formed, and the object to be cut is cut by opening and closing operations of the grips 4 and 5 attached to the base rather than the shaft support position.
The grip handles 4 and 5 attached to the bases of the blade bodies 1 and 2 are formed in an annular shape by continuously connecting the inner grip portions 4a and 5a and the outer guard portions 4b and 5b, and the grip handle grip portion 4a to which a finger hits. A cushioning material 11 such as rubber is disposed on the outer surface of 5a.

Buffer members 6 and 6 projecting toward the other grip handle 5 and 4 are arranged on the inner side surface of the grip end 4 and 5 attached to the base rather than the shaft support position of the blades 1 and 2. Yes. More specifically, the buffer members 6 and 6 are respectively arranged on the same rotation trajectory that is separated from the shaft support position of the blade bodies 1 and 2 by a certain dimension, and the buffer members 6 and 6 are closed when the blade bodies 1 and 2 are closed. 6 are in contact with each other.
The buffer member 6 may be provided only on one of the grip patterns 4 and 5, but if it is arranged on the same rotation locus of both the grip patterns 4 and 5 as in the illustrated embodiment, FIG. When the blades 1 and 2 are closed as shown in FIG. 3, the buffer members 6 and 6 come into contact with each other.

  Even when the cushioning member 6 of the air cushion according to the present invention is provided only on one of the gripping handles 4, 5, it is preferable that the cushioning member abuts on the other gripping handle reliably. A protrusion having the same outer shape as that of the member 6 or a solid buffer member having no air pocket can be attached.

  The buffer member 6 is made of a flexible and buffering material such as urethane resin, rubber, or soft vinyl chloride resin. The buffer member 6 of the illustrated embodiment has a cylindrical shape, and is formed with a substantially half of the tip in a tapered shape, and a fitting hole 8 that does not penetrate from the large diameter portion toward the tip is formed in the center portion. Yes. The tip of the fitting hole 8 is formed in a dome shape.

  In order to attach the buffer member 6 to the gripping handles 4 and 5, as shown in FIG. 3, as shown in FIG. 3, an attachment hole 12 into which the buffer member 6 fits is provided, and a projection 7 is formed in the mounting hole 12. To do. The inner diameter of the mounting hole 12 is a dimension that allows the outer shape of the buffer member 6 to be freely fitted, and the outer diameter of the protrusion 7 is a dimension that fits into the fitting hole 8 of the buffer member 6. The length of the fitting hole 8 is longer than the projection 7 and extends in the axial direction so that the air reservoir 9 is formed in front of the projection 7 in the fitted state. In FIG. 3, a substantially hemispherical air reservoir 9 is formed.

  When the cutting operation is performed by the scissors having the buffer members 6 and 6 attached to the inner side surfaces of the gripping handles 4 and 5, the buffer members 6 and 6 come into contact with each other when the gripping handles 4 and 5 are closed and the cutting is completed. When the cutting is completed, the grip handle is strongly closed by impact due to the force applied during cutting, and the buffer member 6 is pressed in the axial direction by this force. When the buffer member 6 is pressed in the axial direction, the air reservoir 9 is deformed and compressed so as to be crushed as shown in FIG. 4, and the impact force is absorbed by the deformation. In the compressive deformation shown in FIG. 4, both the elastic deformation of the buffer member 6 itself and the compressive deformation of the air reservoir 9 act synergistically to exhibit an excellent buffer effect.

  The air reservoir 9 is compressed by the pressing force even in a completely closed space and exhibits a buffering effect. However, the pressing force necessary for the compression suddenly increases and is recognized as an impact, so that the sufficient buffering effect is obtained. May not be possible. On the other hand, if the fitting state is such that the air in the air pool leaks to some extent, an excellent buffering effect is exhibited by part of the air leaking even against a stronger impact or pressing force. That is, as shown in FIG. 4, when the air reservoir 9 is compressed, air leaks from between the protrusion 7 and the fitting hole 8 due to an increase in internal pressure of the air reservoir 9 and compression deformation of the buffer member 6. When the compressive force is released, air flows into the air reservoir 9 due to the restoring force of the buffer member 6.

  The state where the complete close state is not maintained can be realized by setting the inner diameter of the buffer member 6 made of an elastic member and the outer diameter of the protrusion 7. Further, it can also be realized by forming axial ventilation grooves 12 or 13 communicating with the outside indicated by a two-dot chain line in FIG. 4 on the outer surface of the protrusion 7 or the inner surface of the buffer member 6. Further, as shown by a two-dot chain line in FIG. 3, it can be realized by forming a small through hole 15 communicating with the air reservoir 9 in the buffer member 6.

  The scissors in the embodiment shown in FIG. 5 are pruning scissors for gardening, where the blade body 1 is a receiving blade and the blade body 2 is a cutting blade. In the scissors of this embodiment, a coil spring 10 for urging the blades 1 and 2 in the opening direction is attached to the opposing inner side surfaces of the gripping handles 4 and 5, and the cushion material 11 is attached to the outer surfaces of the gripping handles 4 and 5 that the fingers touch. Is arranged. In order to mount the coil spring 10 between the grips 4 and 5, as shown in FIG. 8, a mounting hole 16 into which the tip of the coil spring 10 is fitted is formed to support the coil spring.

  A projection 18 is provided at the center of the mounting hole 16 for mounting a buffer member 17 made of a flexible material such as urethane resin. The shock-absorbing member 17 attached to the protrusion 18 has a cylindrical shape with an outer flange 17a at the base end, and a fitting hole 19 that does not penetrate from the base end toward the front is formed at the center. The tip of the fitting hole 19 is formed in a dome shape.

  The relationship between the protrusion 18 and the buffer member 17 in the second embodiment shown in FIGS. 6 to 8 functions in the same manner as in the first embodiment described above with reference to FIGS. That is, when the fitting hole 19 of the buffer member 17 is fitted to the protrusion 18, a substantially hemispherical air pocket 20 is formed in front of the protrusion 7, and the gripping handles 4 and 5 are gripped to perform the cutting operation. When this is done, the blades 1 and 2, that is, the gripping handles 4 and 5 are closed against the elasticity of the coil spring 10, the buffer members 17 and 17 come into contact with each other as shown in FIG. 7, and the buffer member is further compressed. As a result, the impact associated with the cutting of the object to be cut is absorbed, and an excellent buffering effect is exhibited. Also in this embodiment, for example, the buffer member according to the present invention can be disposed only on one grip handle, and a simple contact can be formed on the other grip handle.

  The difference between the first embodiment shown in FIGS. 1 to 4 and the second embodiment shown in FIGS. 5 to 8 is that the buffer member 6 of the first embodiment is exposed as a protrusion and is separated from the shaft 3. In contrast to being arranged at the base end of the grip handle, the buffer member 17 of the second embodiment is located close to the shaft 3 and is located inside the coil spring 10. As a specific shape of the buffer member 17 of the second embodiment, the base end portion is provided with an outer flange 17a so as to stably contact the end surface of the attachment hole 16 of the coil spring 10, and the outer periphery of the outer flange 17a and the inner periphery of the attachment hole 16 are provided. A gap through which the filament of the coil spring 10 passes is formed.

  By adopting the above configuration, in the second embodiment, since the buffer member 17 is not located and exposed inside the coil spring 10 that biases the blade bodies 1 and 2 in the opening direction, the buffer member 17 is not exposed in the cutting operation or the like. It does not get in the way. Furthermore, since an external force such as a finger hitting the buffer member 17 does not act, a large mounting strength is not required, so the axial dimension of the projection 18 for mounting the buffer member 17 is the same as in the first embodiment. It can be made short compared.

  In the second embodiment in which the buffer member 17 is positioned inward of the coil spring 10, the coil spring 10 is compressed and its elasticity is increased as the gripping handles 4, 5 are closed. The buffer member 17 comes into contact with the repulsive force of the coil spring 10 being maximized, and exhibits a buffer effect by elastic deformation. That is, the elastic force itself of the coil spring 10 functions as a part of the buffering action, and has a higher buffering effect.

  The conventional shock absorbing structure provided with a contact on the opposite inner surface of the gripping handle is only shock-absorbing due to the elastic deformation of the shock absorber, so that it cannot sufficiently cope with the impact force. However, according to the present invention, not only the elastic deformation of the buffer body but also the effect of the air cushion acts synergistically to realize a hand-friendly bag.

DESCRIPTION OF SYMBOLS 1, 2 ... Blade body, 1a, 1b ... Cutting blade, 3 ... Shaft, 4, 5 ... Grip handle, 6 ... Buffer member, 7 ... Projection, 8 ... Fitting hole, 9 ... Air reservoir, 10 ... Coil spring, 11 ... Cushion material, 12 ... Mounting hole, 13, 14 ... Vent hole, 15 ... Through hole, 16 ... Mounting hole, 17 ... Buffer member, 17a ... Outer casing, 18 ... Projection, 19 ... Fitting hole, 20 ... Air reservoir.

Claims (3)

The object to be cut is cut by opening / closing operation of the grip handle formed on the base of the blade body by pivotally supporting the pair of blade bodies, and the buffer member protrudes toward the other grip handle on the inner surface of the grip handle, When the blade is closed, the buffer member abuts against a part of the inner side surface of the other gripping handle and exhibits a buffering effect.
The buffer member is made of a flexible material such as polyurethane resin or synthetic rubber that can be elastically deformed, and is a cap-like shape that fits on the inner surface of the grip handle and protrudes toward the inner surface of the other grip handle The fitting hole of the buffer member that fits into the projection extends in the axial direction longer than the length of the projection, forms an air pocket in front of the projection in the mounted state, and strongly closes the blade body to cushion the member A shock absorbing structure for a bag, wherein the shock absorbing member is pressed in the axial direction when it comes into contact with a part of the other gripping handle and absorbs an impact by compressive deformation of the air pocket.   In both gripping handles formed at the base of the pair of blades, the buffer members are arranged on the same rotation trajectory separated by a certain distance from the axial support position of the blades, and the buffer members are closed when the blades are closed. 2. The bag cushioning structure according to claim 1, wherein:   A buffer member is disposed on the same inner surface of the pair of gripping handles on the same rotation locus separated from the pivotal support position of the blade body, and the buffer member has an inner diameter of a coil spring that biases the blade body in the opening direction. The bag cushioning structure according to claim 1 or 2, wherein the cushioning structure is disposed inside.

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