JP5473052B2 - Folding tools - Google Patents

Description

  The present invention relates to improvements of various folding tools used mainly in general households.

  Examples of the folding tools used in general households include a folding toothbrush, a folding fruit knife, a folding knife-type pencil sharpener, a folding nail file, a folding comb, or a folding razor. Each of these tools is composed of a tool body having a functional part and a handle, and the tool main body and the handle are connected to each other so as to be foldable around an axis, and when the tool is folded, the functional part of the tool body is placed inside the handle. It is a structure that fits.

  In addition, these tools are used in a straight line by spreading until the tool body and the handle form approximately 180 ° when used. When using the tool in a straight line, it is preferable that the tool body is securely fixed to the handle. Even if the rotation of the tool body in one direction with respect to the handle can be reliably controlled, it is difficult to use because the tool body must work so that it does not rotate when there is no restriction in the other direction and the tool body rotates freely. There is a drawback.

  Further, as another structure for restricting the rotation of the tool body with respect to the handle, there is a tool that is elastically locked by providing irregularities at the contact portion between the tool body and the handle around the shaft. In this structure, when closing the tool body opened linearly, the tool body is rotated with a force larger than the locking force due to the unevenness to release the locking. Therefore, the locking by unevenness does not reliably restrict the rotation of the tool body, but effectively controls the rotation when a force below a certain force is applied, but when a force larger than that is applied, the tool There is a risk that the body will rotate. When the folding tool is a blade such as a razor or a claw file, it is very dangerous that the tool body rotates unexpectedly during use, and it is preferable to securely fix the tool body during use. .

Japanese Utility Model Publication No. 2-149520 No. 7-47092

  The problem to be solved by the present invention is that the tool body of the conventional folding tool cannot be securely fixed to the handle.

Claim 1 of the present invention is a foldable tool that has at least two members and the shaft hole and the shaft are folded together so that the two members can be opened and closed, and the first member is a shaft hole. And a second member coupled to the first member has a shaft, and the first member can be moved relative to the shaft hole. The member is provided with a shaft movement area connected to the shaft hole, and is provided with a regulating means for restricting relative rotation of the first member and the second member when the shaft is moved to the shaft movement area. And detent means for preventing the shaft from moving naturally between the shaft hole and the shaft movement area, the detent means having a width between the shaft hole and the shaft movement area. A narrow part is formed and the shaft can pass through the narrow part only when the shaft is elastically deformed by the force received from the narrow part. It is a certain configuration.

  According to a second aspect of the present invention, the shaft includes a rigid shaft main body and an elastic shaft sleeve attached around the shaft main body. The shaft has a gap at least between the shaft main body and the shaft sleeve. The sleeve passes through the narrow portion by being deformed by being pressed in the direction of closing the gap in the narrow portion.

  According to a third aspect of the present invention, when the first member and the second member are opened, the shaft can move from the shaft hole to the shaft movement area.

  According to a fourth aspect of the present invention, the second member has two stoppers for preventing the relative rotation of the first member, and the first stopper is opened when both the members are opened until they are aligned. Locks to one member to prevent rotation of the first member to prevent further opening of both members, and the second stopper moves the shaft to the axis movement area after opening both members in a straight line In this configuration, the first member is locked when the first member is moved, the first member is prevented from rotating in the closing direction, and the two members are fixed in a straight line in cooperation with the first stopper.

In the first aspect, the first member has a shaft hole, the second member coupled to the first member has a shaft, and the shaft is relatively positioned with respect to the shaft hole. The first member is provided with an axial movement area connected to the shaft hole so that the first member and the second member are relatively moved when the shaft is moved to the axial movement area. And a detent means for preventing the shaft from moving naturally between the shaft hole and the shaft movement area. A narrow portion is formed between the shaft hole and the shaft movement area, and the shaft can pass through the narrow portion only when the shaft is elastically deformed by the force received from the narrow portion. Therefore, when the shaft is moved to the axial movement area and the tool becomes ready for use, both members are relatively relatively unrotatable, so that both members are relatively securely fixed. Even if a large force is applied between them, the member does not rotate, so that it can be used safely. Also, by providing a detent means to prevent the shaft from moving naturally between the shaft hole and the shaft movement area, the tool can be safely prevented by preventing the shaft from returning to the shaft hole during use. Can be used. Further, a narrow portion is formed between the shaft hole and the shaft movement area, and detent means is provided that allows the shaft to pass through the narrow portion only when the shaft is elastically deformed by the force received from the narrow portion. . And the detent means forms a narrow portion between the shaft hole and the shaft movement area, and the shaft can pass through the narrow portion only when the shaft is elastically deformed by the force received from the narrow portion. It is a thing. Therefore, if the shaft is not elastically deformed, the shaft cannot move between the shaft hole and the axial movement area, and a certain amount of force is required to elastically deform the shaft. Can be prevented from moving naturally between the axis and the axis movement area. That is, when moving the shaft engaged with the shaft hole to the shaft movement area, hold the first member and the second member in their hands so that the shaft moves in the direction of the shaft movement area. When a force is applied to the shaft, the shaft hits the narrow part. Therefore, the shaft passes through the narrow portion by applying a further force to deform the shaft so as to be crushed by the stress from the narrow portion. Thus, by making the shaft elastically deformable, it is possible to prevent the shaft from moving naturally.

According to a second aspect of the present invention, the shaft includes a rigid shaft main body and an elastic shaft sleeve attached around the shaft main body. The shaft has a gap at least between the shaft main body and the shaft sleeve. When the sleeve is pressed and deformed in the narrow portion in the direction of closing the gap, the shaft passes through the narrow portion. Therefore, for example, the shaft sleeve is formed in a cylindrical shape, and the shaft main body can be chamfered by chamfering a part of the surface of the column, so that the natural movement of the shaft can be prevented with a simple structure.

According to a third aspect of the present invention, when the first member and the second member are opened, the shaft can move from the shaft hole to the shaft movement area. Therefore, since it can fix reliably so that both members may not rotate when opening both members and using a tool, it can be used smoothly and safely.

According to a fourth aspect of the present invention, the second member has two stoppers for preventing the relative rotation of the first member, and the first stopper is the first stopper when both the members are opened until they are aligned. Lock one member to prevent rotation of the first member so that both members do not open any further, the second stopper moves the shaft to the axis movement area after opening both members in a straight line When the first member is moved, the first member is locked to prevent the first member from rotating in the closing direction, and the two members are fixed in a straight line in cooperation with the first stopper. In this section, it is necessary to open both members in a straight line when moving the shaft to the axis movement area, but the second member is engaged with the first stopper when both members are opened in a straight line. Since it stops, the linear state of both members can be recognized and the state can be maintained. Therefore, it is possible to easily perform the operation of moving the shaft to the axial movement area by making both the members straight. Moreover, both members can be reliably fixed in a straight line by the first stopper and the second stopper.

FIG. 1 is a front view showing a state in which a file plate as a first member and a handle as a second member are opened in a straight line. FIG. 2 is an exploded view of the present invention. FIG. 3 is an enlarged view of the vicinity of the bearing of one side plate of the second member. FIG. 4 is an enlarged view of the vicinity of the shaft hole of the first member. FIG. 5 is an enlarged view of the vicinity of the bearing of the other side plate of the second member. 6 is an enlarged back view of the first member in FIG. FIG. 7 is an exploded perspective view of the shaft. FIG. 8 is an exploded view showing a state where the shaft is engaged with the shaft hole. FIG. 9 is an exploded view showing a state where the shaft has moved to the axis movement area. FIG. 10 is a partial perspective view showing a state in which the first member is locked to the first stopper.

  The embodiment relates to a foldable nail file in which a first member is a file plate 1 and a second member is a handle 2 so that they can be opened and closed. The file plate 1 is stored in a file plate storage portion 7 formed by a gap between the side plates 4 and 5 of the handle 2 when folded.

  As described above, the handle 2 is formed by overlapping the side plates 4 and 5 and joining the contact portions. The contact portion is a joint portion 6 provided on one side plate 4 from the back to the end of the inner surface. A portion surrounded by the joint portion 6 is formed lower than that, and the lower portion constitutes one of the file plate storage portions 7. A hole-shaped bearing 8 is formed in the base 11 of the side plate 4. The shape of the bearing 8 is an oval shape in which both sides of a circle are cut by parallel straight lines. The parallel straight lines extend in the length direction of the handle 2, and thus the oval shape also extends in the length direction of the handle 2.

  An arcuate guide groove 9 is formed outside the peripheral portion 19 of the bearing 8, and a linear guide groove 10 that communicates with the arcuate guide groove 9 and extends in the length direction is formed. The peripheral portion 19 of the bearing 8 is formed so as to be higher than the bottom of the arc-shaped guide groove 9 and slightly lower than the inner surface of the side plate 4. A protruding first stopper 12 is formed on the back end of the base 11 of the side plate 4. A second stopper 31 is formed at the end of the joint portion 6.

  The contact portion of the both side plates 4 and 5 described above is the joint portion 13 provided from the inner surface to the end portion of the other side plate 5. And the part surrounded by the joint part 13 is formed lower than that, and the part formed so low constitutes the other side of the file board storage part 7. Further, a hole-like bearing 15 is formed in the base portion 14 of the side plate 5. The shape of the bearing 15 is an oval shape extending in the length direction of the handle 2 in the same manner as the one of the bearings 8.

  A recess 16 is formed in the distal direction from the base portion 14 leaving the peripheral portion 20 of the bearing 15. The recess 16 constitutes a space for mounting a torsion spring 17 to be described later. A locking groove 18 is formed in the back of the recess 16. The locking groove 18 is for locking one bent end 43 of the torsion spring 17. The peripheral portion 20 of the bearing 15 is formed so as to be higher than the bottom of the recess 16 and slightly lower than the inner surface of the side plate 5. A protruding first stopper 21 is formed on the back end of the base 14 of the side plate 5. A second stopper 32 is formed at the end of the joint portion 13. The side plates 4 and 5 are manufactured by aluminum die casting, but are not limited thereto.

  The file plate 1 has file surfaces 22 and 23 on both sides. The roughness of the file surfaces 22 and 23 may be different or the same. A shaft hole 25 and an axial movement area 26 are connected to the base portion 24 of the file plate 1 through a narrow portion 27 so as to extend in the length direction. Both the axial hole 25 and the axial movement area 26 have a shape forming a part of a circle having the same size. Therefore, the overall shape obtained by combining the shaft hole 25 and the shaft movement area 26 is a gourd shape that is symmetrical in the vertical direction extending in the length direction. The constricted portion of the gourd is the narrow constituent portions 28, 28, and the narrow portion 27 is formed between the narrow constituent portions 28, 28. An elongated protrusion 29 is formed near the shaft hole 25, and a spring hole 30 is formed in the protrusion 29. The spring hole 30 passes through the file plate 1, and the other bent end portion 42 of the torsion spring 17 is inserted from the other side of the spring hole 30. A stopper receiving portion 33 for the second stoppers 31 and 32 is formed at one corner of the base portion 24 of the file plate 1. Further, a finger hook 34 for rotating the file plate 1 is provided on the side of the base 24. The total length of the file plate 1 is about 79 mm, and the width is about 10.5 mm. Moreover, the length a shown in FIG. 6 is about 6.0 mm, the length b is about 5.6 mm, and the length c is about 12.0 mm.

  The shaft 35 includes a shaft main body 36, a shaft sleeve 37, and a shaft bolt 38. The shaft main body 36 and the shaft bolt 38 are both made of metal, and a bolt hole 44 for screwing the shaft bolt 38 into the shaft main body 36 is formed. Planar portions 40 and 40 having chamfered both sides of the cylinder are formed on the body portion 39 of the shaft body 36. These two planar portions 40 and 40 are parallel and have the same oval shape as the bearings 8 and 15. . Therefore, when the shaft main body 36 is inserted into the bearings 8 and 15, the shaft main body 36 cannot rotate with respect to the bearings 8 and 15. When the body 39 is inserted into the shaft sleeve 37, a space allowing deformation of the shaft sleeve 37 is formed between the shaft sleeve 37 and the flat portions 40, 40 of the shaft body 36 as shown in FIG. 8 or 9. A certain gap 41 is generated. The maximum width of the gap 41 is about 0.6 mm. Further, the width between the flat portions 40 of the shaft body 36 is smaller than the width of the narrow portion 27. The width between the flat portions 40 and 40 is about 3.0 mm, and the width of the narrow portion 27 is about 5.6 mm.

The shaft sleeve 37 is made of flexible plastic. The outer diameter of the shaft sleeve 37 is about 6.0 mm, which is substantially the same as the inner diameter of the shaft hole 25 and the shaft movement area 26, and when the shaft sleeve 37 is fitted in the shaft hole 25 or the shaft movement area 26. In addition, it is preferable that the shaft sleeve 37 be in a slightly pressure contact state and generate a frictional force. The total length from the shaft hole 25 of the file plate 1 to the shaft movement area 26 is preferably 1.5 times or more and 3 times or less of the outer diameter of the shaft sleeve 37. The inner diameter of the shaft sleeve 37 is preferably slightly larger than the outer diameter of the arc portion of the shaft body 36. That is, the inner surface of the shaft sleeve 37 is preferably close to the surface of the arc portion of the shaft body 36. Here, proximity means a state where there is a slight gap or is in contact. Further, the outer diameter of the shaft sleeve 37 is larger than the width of the narrow portion 27. The outer diameter of the shaft sleeve 37 is about 6.0 mm, the inner diameter is about 4.2 mm, and thus the thickness of the shaft sleeve 37 is about 0.9 mm. When the portion of the shaft sleeve 37 that is separated from the shaft main body 36 is pressed with the gap 41 interposed therebetween, the portion of the shaft sleeve 37 is deformed so as to be crushed toward the gap 41 that is a deformation allowable space. As a result, the lateral width of the shaft sleeve 37, that is, the width of the shaft sleeve 37 in the direction perpendicular to the length direction of the file plate 1 is reduced. The width is reduced to a length of about 93% of the original width. The rate of decrease is preferably about 80 to 95% of the original width. By reducing the width of the shaft sleeve 37, the shaft sleeve 37 becomes an ellipse that is slightly longer in the length direction of the file plate 1, and the shaft sleeve 37, that is, the shaft 35 can pass through the narrow portion 27 of the file plate 1. .

As described above, the shape of the bearings 8 and 15 is an oval shape extending in the length direction of the handle 2, and the cross section of the body portion 39 of the shaft body 36 inserted through the bearings 8 and 15 is similarly the length of the handle 2. It is an oval shape extending in the vertical direction. The shaft hole 25 and the axial movement area 26 of the file plate 1 are connected so as to extend in the length direction of the file plate 1 through a narrow portion 27, and form a gourd shape extending in the length direction as a whole. Yes. Therefore, the shaft sleeve 37, that is, the shaft 35 can pass through the narrow portion 27 only when the file plate 1 and the handle 2 are in a straight line, and cannot pass during the rotation of the file plate 1. is there. When the file plate 1 is closed, the file plate 1 is stored in the storage portion 7 of the handle 2 and it is difficult to give the file plate 1 the force to move the file plate 1 in the length direction. It cannot pass.

  Next, assembly of the claw file 3 will be described. FIG. 2 is an exploded view of the claw file 3 disassembled with the file plate 1 closed. Four components of the claw file 3 are shown, and are one side plate 4, the file plate 1, the other side plate 5 and a decorative plate 47 in order from the top. The side surface of the decorative plate 47 is shown on the right side of the decorative plate 47. The shaft body 36 and the shaft bolt 38 are omitted. The claw file 3 is sandwiched between the side plate 4 and the side plate 5 so that the torsion spring 17 attached to the file plate 1 is received in the recess 16 of the side plate 5. In order to connect the side plate 4 and the side plate 5, pins (not shown) are fitted between the three pin holes 49 provided in the side plate 4 and the three pin holes 50 provided in the side plate 5. A shaft body 36 is inserted through the bearing 8, the bearing 15, and the sleeve 37, and the shaft body 36 and the shaft bolt 38 are screwed together. The decorative plate 47 is attached to the surfaces of the side plates 4 and 5.

Furthermore, the assembly method will be described in detail. First, the shaft body 36 is inserted from below into the bearing 15 of the other side plate 5 in the state shown in FIG. Next, as shown in FIG. 4, the shaft sleeve 37 is fitted into the shaft hole 25. Since the length of the shaft sleeve 37 is longer than the thickness of the file plate 1, both end portions of the shaft sleeve 37 protrude from the file plate 1. Next, as shown in FIG. 4, the bent end portion 42 of the torsion spring 17 is inserted into the spring hole 30 from the side where the protruding portion 29 of the file plate 1 is not provided. Then, with the bent end 42 of the torsion spring 17 inserted into the spring hole 30, the file plate 1 is placed on the side of the side plate 5 while the shaft body 36 is inserted through the sleeve 37 with the torsion spring 17 on the lower side. Put it on top. At that time, the other bent end 43 of the torsion spring 17 is engaged with the locking groove 18 formed in the side plate 5. Both ends of the torsion spring 17 are fixed, and the two linear portions of the torsion spring 17 that are opened in the shape of an eight are slightly closed to generate a biasing force.

  Next, the side plate 4 is stacked from above the file plate 1 while the shaft body 36 is inserted through the bearing 8 of the side plate 4. Then, pins (not shown) are fitted into the respective pin holes 49 and 50 provided in the joint portions 6 and 13 of the both side plates 4 and 5 to couple the both side plates 4 and 5. As described above, the peripheral portion 19 of the bearing 8 is formed to be slightly lower than the inner surface of the side plate 4, and the peripheral portion 20 of the bearing 15 is formed to be slightly lower than the inner surface of the side plate 5. As the peripheral portions 19 and 20 are lowered, the steps 45 and 46 are generated, so that both end portions of the shaft sleeve 37 protruding from the file plate 1 are filled with the steps 45 and 46. As a result, the length of the shaft sleeve 37 can be increased by an amount corresponding to the level difference, so that a sufficient elastic force can be obtained even with the shaft sleeve 37 that is thin and easily deformed.

  After the side plates 4 and 5 are joined to both sides of the file plate 1, the shaft bolt 38 is screwed into the shaft body 36. After the shaft bolt 38 is attached, a decorative plate 47 having a U-shaped cross section made of plastic is attached to the surfaces of the side plates 4 and 5. The decorative plate 47 functions to prevent the side plates 4 and 5 from peeling off and the handle 2 from cracking. In place of the decorative plate 47, a synthetic leather or genuine leather sheet may be attached. By attaching the shaft 35, the file plate 1 can be rotated with respect to the handle 2. Along with the rotation of the file plate 1, the elongated protrusion 29 formed on the file plate 1 moves in the guide groove 9 of the side plate 4. Thus, when the shaft sleeve 37 of the shaft 35 is fitted in the shaft hole 25, the file plate 1 can be rotated with respect to the handle 2, and the file plate 1 is closed in the storage portion 7. The file 1 and the handle 2 can be opened until they are in a straight line. When the file plate 1 and the handle 2 are opened in a straight line, as shown in FIG. 10, the edge of the file plate 1 opposite to the finger-hanging portion 34 is locked to the first stoppers 12, 21, and the file plate Restrict 1 from rotating further. Therefore, the user can clearly recognize that the file plate 1 and the handle 2 are aligned. When the file plate 1 is closed in the storage portion 7, as described above, the two straight portions of the torsion spring 17 are slightly closed to generate a biasing force. Since the urging force acts in a direction in which the file plate 1 is intended to be closed, the closed file plate 1 can be prevented from opening naturally. When the file plate 1 is closed, the elongated protrusion 29 formed on the file plate 1 moves in the guide groove 9 of the side plate 4, and the protrusion 29 is guided when the file plate 1 is completely closed. It hits the end of the groove 9. When the protrusion 29 hits the end, it helps to prevent the file plate 1 from moving in the length direction. The total length of the claw file 3 with the file plate 1 closed is about 85 mm.

  Next, the usage method of the nail file 3 which is an Example of this invention is demonstrated. When opening the file plate 1, first, the file plate 1 is gradually opened while applying a force in the direction in which the file plate 1 is opened with the fingertips being directed to the finger hooks 34. Then, the two linear portions forming the eight-shaped shape of the torsion spring 17 are gradually closed, and the fingertip receives an elastic reaction force from the torsion spring 17, so that the file plate 1 is opened against the elastic force. Then, when the file plate 1 is opened approximately 60 ° from the closed state, the two straight portions of the torsion spring 17 that has been biased in the direction of closing the file plate 1 start to rotate and elastically open. The file plate 1 is automatically opened by the elastic force of the torsion spring 17 without applying a force to the portion 34. When the file plate 1 automatically opens 180 °, the rotation of the file plate 1 is restricted there. However, in that state, the torsion spring 17 is biased in the direction to open the file plate 1 so that the file plate 1 is opened. The state can be maintained. When the file plate 1 is closed, conversely, when a fingertip is applied to the finger hook 34 and a force is applied in the direction in which the file plate 1 is closed by the fingertip, the file plate 1 is opened to an angle of about 120 °. When closed, the file plate 1 is automatically closed by the action of the torsion spring 17. Thereby, both opening and closing of the file board 1 can be operated with one hand.

  FIG. 8 shows the positional relationship among the file plate 1, the side plate 4, and the shaft 35 when the file plate 1 is completely opened and aligned with the handle 2. The shaft 35 is fitted in the shaft hole 25. The edge of the file plate 1 opposite to the finger-hanging portion 34 is locked to the first stopper 12 and further rotation is restricted. In this state, the file plate 1 rotates in the closing direction, that is, in the clockwise direction. FIG. 9 shows a state in which the rotation is restricted. In order to obtain the state shown in FIG. 9 after the file plate 1 is completely opened, the file plate 1 and the handle 2 are held with different hands in the state shown in FIG. 8, and the file plate 1 is moved along the length direction. Press in the direction of. Alternatively, the handle 2 is grasped with one hand, the thumb of the hand is directed to the finger hook 34, and the file board 1 is pulled in the direction of the handle 2. Then, the shaft sleeve 37 is deformed so as to collide with the narrow structure portions 28 and 28 and passes through the narrow portion 27, and the shaft 35 moves to the shaft movement area 26. The narrow components 28, 28 are formed in a smooth arc shape and the shaft sleeve 37 has moderate elasticity, so that the shaft sleeve 37 is compressed by the narrow components 28, 28 when moving to the axial movement area 26. It is deformed, and when it moves to the axis movement area 26, it returns to its original shape at once. This series of deformations of the shaft sleeve 37 gives a comfortable feeling to the user. When the shaft sleeve 37 moves to the shaft movement area 26, the stopper receiving portion 33 of the file plate 1 is engaged with the second stopper 31, and the rotation of the file plate 1 in the closing direction is restricted. That is, the file plate 1 is restricted from rotating in any direction with respect to the handle 2. The stopper receiving portion 33 also engages with the second stopper 32 of the other side plate 5.

In this way, the file plate 1 is in a closed state, a second state in which the file plate 1 is rotated from the first state, and a file plate from the second state. The three states of the third state in which 1 is linearly pushed in the direction of the handle 2 and locked in any rotation direction are taken. Then, the operation of the file plate 1 when moving from the first state to the second state is a rotational motion, and the operation when moving from the second state to the third state is a linear motion, and is in a use state. Therefore, the file plate 1 takes a plurality of operations of rotational movement and linear movement. Since the state of the file plate 1 is shifted by different operations, the change of the operation and the change of the state of the file plate 1 are interlocked, and the user perceives the state of the file plate 1 sensuously without looking at the file plate 1. be able to.

  As described above, the operation of the file plate 1 when moving from the first state to the second state is a rotational motion, and the operation when moving from the second state to the third state is a linear motion, In order to obtain a state, the file plate 1 takes a plurality of operations of rotational motion and linear motion. These rotational movements and linear movements can be performed by operating the fingertips addressed to the finger hanging portion 34. Since the finger-hanging portion 34 has an arc shape, the fingertip can be directed to both the front and rear sides of the file plate 1 in the longitudinal direction. For this reason, any one of the rotary motion that opens the file plate 1, the linear motion that locks the file plate 1, the linear motion that releases the lock, and the rotary motion that closes the file plate 1 is a finger-hanging unit as one operation unit. Can be done by. As described above, the reason why both the rotational movement and the linear movement m of the file plate 1 can be performed by operating the finger hanging portion 34 is that when the file plate 1 is opened, as shown in FIG. 2 protrudes from one side in the width direction (upper side in FIG. 1), and when the file plate 1 is closed, the finger hook 34 protrudes from the other side in the width direction of the handle 2 (lower side in FIG. 1). This is because it is possible to apply a finger to the protruding finger-hanging portion 34 at any time of opening and closing. Further, as shown in FIG. 6, the finger hook portion 34 is located close to the side of the shaft hole 25 (upward in FIG. 6). Therefore, although the fingertip addressed to the finger-hanging portion 34 starts with a linear motion, it can be connected to a subsequent smooth rotational motion.

When the nail file 3 is polished, the nail file 3 is used while being moved in various directions with respect to the nail. However, the nail file 3 is often used while being reciprocated in the length direction. At this time, if the file plate 1 moves in the length direction with respect to the handle 2, the nail cannot be polished smoothly. In the present invention, even if the shaft 35 tries to return to the shaft hole 25 during use of the claw file 3 or the like, the shaft sleeve 37 and the narrow structure portion 28 cooperate to prevent the shaft 35 from moving. The plate 1 is prevented from moving in the length direction with respect to the handle 2. Therefore, even if the nail file 3 is reciprocated in the length direction during use of the nail file 3, the file plate 1 does not move in the length direction with respect to the handle 2 and does not rotate. In addition, the linear guide groove 10 shown in FIG. 8 is a groove for receiving the protrusion 29 provided on the back surface of the file plate 1 when the file plate 1 of FIG. 9 is fixed. . That is, it is a relief groove of the protrusion 29. The protrusion 29 is placed in the guide groove 10 to assist in preventing the file plate 1 from rotating and moving in the handle 2 direction.

FIG. 8 shows a state in which the file plate 1 is opened as described above. From this state, the file plate 1 can be rotated and closed in the clockwise direction. When the file plate 1 is completely closed, the first stoppers 12 and 21 are inserted into the notches 48 of the finger pad 34 to help prevent the file plate 1 from moving in the length direction.

In addition, this invention can take a various aspect based on the structure mentioned above. For example, the tool is not limited to a nail file, and may be, for example, a folding toothbrush, a folding fruit knife, a folding knife-type pencil sharpener, a folding comb, or a folding razor. Further, the shaft 35 does not use a separate shaft sleeve, the body 39 of the shaft main body 36 is formed of a two-layer material with a circular cross section, and the central portion is made of metal or hard plastic, and the outer layer May be configured to deform the outer layer as a flexible plastic . The shaft body 36 may be formed integrally with one side plate. In the embodiment, the shaft 35 moves relative to the file plate 1, but the shaft 35 may move relative to the side plates 4, 5. In this case, the shape of the bearings 8 and 15 of the side plates 4 and 5 is the same gourd shape as the shaft hole 25 and the shaft movement area 26, and the shape of the shaft hole 25 and the shaft movement area 26 of the file plate 1 is the same as that of the bearing 8. Form. The numerical values of the present invention are as described above, but the present invention is not limited to these numerical values.

Since the nail file 3 does not rotate unexpectedly during use, the nail can be polished smoothly. When the tool is a blade, it is very safe because the blade can be fixed.

DESCRIPTION OF SYMBOLS 1 File plate 2 Handle 3 Claw file 4 Side plate 5 Side plate 6 Joint part 7 Storage part 8 Bearing 9 Guide groove 10 Guide groove 11 Base part 12 First stopper 13 Joint part 14 Base part 15 Bearing 16 Recess 17 Torsion spring 18 Engagement Stop groove 19 Peripheral portion 20 Peripheral portion 21 First stopper 22 File surface 23 File surface 24 Base portion 25 Shaft hole 26 Shaft moving area 27 Narrow portion 28 Narrow component portion 29 Projection portion 30 Spring hole 31 Second stopper 32 Second stopper 33 Stopper receiving portion 34 Finger hook portion 35 Shaft 36 Shaft body 37 Shaft sleeve 38 Shaft bolt 39 Body portion 40 Flat portion 41 Gap 42 Bending portion 43 Bending portion 44 Bolt hole 45 Step 46 Step 47 Decorative plate 48 Notch 49 Pin hole 50 Pin hole

Claims (4)

A collapsible tool having at least two members, the shaft hole and the shaft being collaboratively folded so that the two members can be opened and closed, wherein the first member has a shaft hole, and the first member The second member coupled to the member has a shaft, and the first member has a shaft connected to the shaft hole so that the shaft can be moved relative to the shaft hole. A movement section is provided, and when the shaft is moved to the shaft movement section, there is provided a regulation means for regulating the relative rotation of the first member and the second member, and the shaft is a shaft hole and a shaft. A detent means for preventing natural movement between the movement area, the detent means forming a narrow portion between the shaft hole and the axis movement area, the shaft being be characterized by a force received from the narrow portion is configured to the shaft only when elastically deformed and can pass through the narrow portion Folding tool. The shaft includes a rigid shaft main body and an elastic shaft sleeve attached around the shaft main body, and has a gap in at least a part between the shaft main body and the shaft sleeve. The tool according to claim 1 , wherein the shaft passes through the narrow portion by being deformed by being pressed in the direction of closing the gap. The tool according to claim 1 or 2, wherein the shaft is movable from the shaft hole to the shaft movement area when the first member and the second member are opened. The second member has two stoppers for preventing relative rotation of the first member, and the first stopper is engaged with the first member when both members are opened until they are aligned. To prevent the first member from rotating further so that the two members do not open any further, and the second stopper is used when the shaft is moved to the axial movement area after both members are opened in a straight line. The tool according to claim 3 , wherein the tool is locked to one member to prevent the first member from rotating in the closing direction and cooperates with the first stopper to fix both members in a straight line.

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