JP6467984B2 - rivet - Google Patents

Description

  This application relates to rivets.

  Conventionally, a rivet is known as a fastening member for fastening two plates. A rivet inserts a pin into the opening of a cylindrical body made of resin with a dome-shaped tip, and pushes the head of the pin to project the pin shaft from the tip. A simple fastener that spreads and fixes a plurality of plates and the like. This type of rivet is also called a push rivet. Unlike conventional fixing methods using screws, rivets can be used to easily fix printed boards and multiple boards simply by pressing pins.

  As a comparative technique for such rivets, for example, Patent Document 1 discloses a clip for attaching a member to be attached such that a member to be attached such as an interior part of an automobile is detachably attached to the body. In the clip disclosed in Patent Document 1, the leg portion in the open leg state provided on the clip body contracts and closes when passing through the hole on the attachment surface, and opens after passing, so the attached member is attached to the attachment surface. It is done. When removing the clip, if the push pin inserted into the clip body is pressed, the leg of the clip body that is opened by the movement of the push pin will lock in the closed state, so The joint is released and the mounted member can be removed from the mounting surface.

JP-A-5-034331

  However, since the clip in Patent Document 1 does not have a locking mechanism in the leg portion in the open leg state, there is a possibility that the clip body may come out of the hole in the mounting surface when the leg leg in the open leg state is closed by the vibration in the vertical direction. There is. Further, when the clip is removed after being attached, the leg portion is locked in a closed state, so that it is difficult to reuse the clip body. Furthermore, the clip in Patent Document 1 cannot be mounted with variations in the thickness of the mounting surface to which the mounted member is mounted.

  In one aspect, the present application allows a plurality of plate materials to be fastened even if the plate thickness is different, and does not come off by a lock mechanism after attachment, and can be easily removed by a removal operation and reused after removal. The purpose is to provide rivets that can be used.

  According to one embodiment, the first cylindrical member provided with a closed tip portion, a trunk portion, and a rear end portion provided with a bulging portion, and provided with a plurality of slits from the tip portion toward the trunk portion; The front end of the first cylindrical member has a total length longer than that of the first cylindrical member, moves in the first cylindrical member, and the front end of the first cylindrical member protrudes from the front end of the first cylindrical member. A second cylindrical member that expands the portion, and a second cylinder that is incorporated in the distal peripheral portion of the second cylindrical member, and the distal peripheral portion of the second cylindrical member protrudes from the distal end portion of the first cylindrical member. The leg portion protruding from the outer peripheral surface of the peripheral portion of the tip end of the cylindrical member engages with the tip end portion of the first cylindrical member, and the tip end portion of the second cylindrical member protrudes from the tip end portion of the first cylindrical member. A locking member that is locked in a state where the second cylindrical member is moved, and the second cylindrical member that is movably provided inside the second cylindrical member and is pushed from the rear end side of the second cylindrical member And a pin member that releases the locking of the second cylindrical member by the lock member in a state where the tip portion protrudes from the tip side of the second cylindrical member, and is provided on the plurality of coupled members. The first tubular member is inserted into the coupling hole, the second tubular member is moved, the second tubular member is locked to the first tubular member by the lock member, and a plurality of coupled members are coupled. When releasing the connection, a rivet is provided that moves the pin member to protrude from the tip end side of the second cylindrical member.

  The disclosed rivet can be fastened with multiple plates regardless of the plate thickness. After fastening, the rivet will not come off, improving the reliability of the product using the rivet, and being easily removed by the removal operation. Has the effect of being reusable as it is.

(A) is sectional drawing which shows the state which inserted the rivet of the comparison technique in the through-hole provided in the board material to fasten two sheets, (b) is two board materials fastened by the rivet shown to (a). It is sectional drawing which shows a state. (A) is an exploded perspective view of the rivet showing the components of the rivet of the first embodiment, (b) is a sectional view of the assembled rivet shown in (a), and (c) is a part A of (b). FIG. (A) is the perspective view which looked at the socket which is a 1st cylindrical member from the rear end side, (b) is sectional drawing of the socket shown to (a). (A) is a front view of the 2nd cylindrical member, lock member, and pin member before assembling a rivet, (b) shows the assembly process of the 2nd cylindrical member, lock member, and pin member which were shown to (a). Side view, (c) is a side view after assembling the second cylindrical member, lock member and pin member shown in (b), (d) is the second cylindrical member, lock member shown in (b) It is a front view after assembling the pin member. (A) is the exploded view which shows the structural member of one Example of a locking member, (b) is a perspective view which shows the process of assembling a locking member using the member shown to (a), (c) is (b) The perspective view which shows the state by which the lock member shown to (4) was assembled, (d) is a perspective view which shows the other Example of a lock member. (A) is an assembly perspective view which shows a mode that a circuit board is mounted in housing | casings, such as an electronic device, (b) is a use place of the disclosed rivet at the time of fixing a circuit board to the housing | casing shown to (a). It is a perspective view shown. (A) shows the state which inserted the 1st cylindrical member of the disclosed rivet in the attachment hole provided in the sheet metal and the circuit board, when attaching and fixing a circuit board to the sheet metal shown in FIG.6 (b). Sectional drawing, (b) is a state where the second tubular member is pushed together with the pin member from the state shown in (a) to move the second tubular member within the first tubular member, and the tip of the first tubular member is moved. (C) is a cross-sectional view for explaining the opening operation, and (c) shows that the second cylindrical member and the pin member are further moved from the state shown in (b), and the leg portion of the locking member is moved from the tip of the second cylindrical member Sectional drawing which shows the state which protruded, (d) is sectional drawing which shows the same state as (c) in case the board thickness of a circuit board differs. 7A is a cross-sectional view showing a state where the pin member is pushed to move the inside of the second cylindrical member in the state shown in FIG. 7C, and the tip end portion of the pin member presses the lock member, and FIG. Sectional drawing which shows the state which pulled up the 2nd cylindrical member and the lock member from the state shown to (a), and canceled engagement with the 1st cylindrical member of a lock member, (c) showed in (b) Sectional drawing which shows the state which the pin member moved in the 2nd cylindrical member with the urging | biasing force of the spring from the state, (d) is drawing out the 2nd cylindrical member from the 1st cylindrical member from the state shown in (c). It is sectional drawing which shows the state which the lock member engaged with the 1st cylindrical member when it moved to the direction. (A) is a partial enlarged perspective view of the rear end portion side of the rivet of the first embodiment, and (b) is a partial enlarged perspective view of the rear end portion side of the rivet of the second embodiment. (A) is a sectional view corresponding to FIG. 7 (a) when the rivet of the first embodiment is used, showing a state in which the circuit board is fixed to the sheet metal using the rivet of the second embodiment, (b) Sectional drawing corresponding to FIG.7 (c) at the time of using the rivet of 1st Example which shows the state which fixes a circuit board to sheet metal using the rivet of 2nd Example, (c) is 2nd Example. FIG. 8D is a cross-sectional view corresponding to FIG. 8A when the rivet of the first embodiment is used, showing a state where the rivet of the second embodiment is released, and FIG. 8D is a state of releasing the rivet of the second embodiment. FIG. 8B is a cross-sectional view corresponding to FIG. 8B when the rivet of the first embodiment is used, and FIG. 8E shows the rivet of the first embodiment showing a state in which the fastening of the rivet of the second embodiment is released. FIG. 8C is a sectional view corresponding to FIG. 8C, and FIG. 8F is a second cylindrical member of the rivet of the second embodiment. And showing a locking operation of the locking member when pulled out of the first tubular member, a cross-sectional view corresponding to FIG. 8 (d) in the case of using a rivet in the first embodiment. It is sectional drawing which shows the modification Example of the rivet of 2nd Example.

  Hereinafter, embodiments of the present application will be described in detail based on specific examples with reference to the accompanying drawings.

FIG. 1A shows a rivet 9 of a comparative technique used for joining a plate-like first member 71 and a second member 72. The rivet 9 has a socket 80 and a push pin 90, and is generally formed of a synthetic resin. A through-hole 84 is provided in the distal end portion 81 of the socket 80, and a plurality of slits (cuts) are provided from the through-hole 84 to the trunk portion 82. The slit is not shown in the figure. Further, the rear end portion 83 of the socket 80 is bulged to form a flange 85. The push pin 90 has a head portion 91 projecting from a shaft portion 92, and a tip portion 93 and a shaft portion 92 are inserted into the socket 80.

  The first member 71 and the second member 72 to be fastened each have a through hole 73.74, and the body portion 82 of the socket 80 of the rivet 9 is inserted into the through hole 73.74. The socket 80 is inserted into the through hole 73.74 until the flange 85 reaches the surface of the second member 72. In this state, the distal end portion 81 of the socket 80 protrudes from the through hole 73. When the first member 71 and the second member 72 are coupled, when the head 91 of the push pin 90 is pushed, the tip portion 93 of the shaft portion 92 becomes the tip portion 81 of the socket 80 as shown in FIG. Is expanded to increase the diameter of the body portion 82 of the socket 80. As a result, the socket 80 cannot be removed from the through holes 73 and 74, and the first member 71 and the second member 72 are coupled.

  In the rivet 9 of the comparative technique, when the fastening of the first member 71 and the second member 72 is released, the head 91 of the push pin 90 is grasped and pulled with a tool such as pliers, and the shaft portion 92 is pulled out from the socket 80. . Thus, although the rivet 9 of the comparative technique can be easily attached and detached, there is a problem that the push pin 90 is easily detached from the socket 80 due to a disturbance or the like. Further, when the head portion 91 of the push pin 90 is grasped with a tool and the shaft portion 92 is pulled out, the head portion 91 is crushed by the tool and the rivet 9 cannot be reused.

(Rivets of the first embodiment)
The present application provides a rivet that solves the problem of the rivet 9 of the comparative technique. Fig.2 (a) has shown the structural member of the rivet 1 of 1st Example. The rivet 1 according to the first embodiment includes a first tubular member 10, a second tubular member 20, a lock member 30, and a pin member 40. As shown in FIG. 2B, the second tubular member 20 is inserted into the first tubular member 10 from the rear end portion 13 with the lock member 30 and the pin member 40 built therein. FIG. 2 (c) is an enlarged view of portion A in FIG. 2 (a). First, the structure of each of the first cylindrical member 10, the second cylindrical member 20, the lock member 30, and the pin member 40 will be described.

(First cylindrical member)
The structure of the first tubular member 10 is shown in FIGS. 2 (a), 2 (b), 3 (a), 3 (b), and the like. The first tubular member 10 includes a front end portion 11, a body portion 12 and a rear end portion 13. As long as the material of the 1st cylindrical member 10 is the material which the front-end | tip part 11 spreads, resin or a metal may be sufficient. The distal end portion 11 has a dome shape, and a through hole 14 is provided at the most distal end portion. A plurality of slits (cuts) 15 are provided from the edge of the through hole 14 toward the body 12. In this embodiment, the slit 15 is provided so as to extend to the middle of the body portion 12, but the length of the slit 15 is not limited, and can be adjusted to the plate thickness of the plate-like member to which the rivet 1 is coupled. It ’s fine. The slit 15 is in a state where nothing is inserted into the passageway 18 is a gap absence, there may be a gap.

  Further, the rear end portion 13 is bulged to form a flange 16. The first cylindrical member 10 of the rivet 1 in which the distal end portion 11 and the body portion 12 are inserted into the mounting holes of the plurality of plate members to be fastened is locked by the flange 16. On the other hand, a locking groove 17 is provided near the rear end portion 13 on the inner peripheral surface of the passage 18 for moving the second cylindrical member inside the trunk portion 12. The locking groove 17 has a surface perpendicular to the passage 18 on the rear end 13 side, and a tapered surface on the front end 11 side. The function of the locking groove 17 will be described later.

(Second cylindrical member)
The structure of the second cylindrical member 20 is shown in FIG. 2A, FIG. 2B, FIG. 4A to FIG. The second cylindrical member 20 includes a front end portion 21, a body portion 22 and a rear end portion 23. The material of the second cylindrical member 20 may be resin or metal. As shown in FIG. 2A, the distal end portion 21 has a dome shape, and a tapered distal end peripheral portion 24 is provided between the distal end portion 21 and the trunk portion 22. The distal end peripheral portion 24 is provided with a lock member accommodation hole 25 for accommodating the lock member 30. The trunk portion 22 has a cylindrical shape, and a rear end portion 23 has a tapered portion 23T that is bulged with respect to the trunk portion 22 and gradually increases in diameter.

  As shown in FIG. 4A to FIG. 4C, the second cylindrical member 20 can be divided into left and right parts on a plane passing through the axis. This is because the pin member 40 cannot be accommodated inside unless divided into two. Inside the second cylindrical member 20, as shown in FIG. 4A, there is a lock member accommodation hole 25 in the distal end peripheral portion 24, and the base of the lock member 30 is freely rotatable in the lock member accommodation hole 25. There is a stopper 25S that holds the shaft hole 25H held in the shaft and a rotation of a leg portion of the lock member described later. An internal passage 26 extending to the rear end portion 23 of the second tubular member 20 is formed in the lock member accommodation hole 25, and a diameter-expanded portion 26 </ b> E is provided in the middle of the internal passage 26. Further, the rear end portion 23 side of the internal passage 26 is gradually enlarged in diameter to form a tapered portion 26T.

(Pin member)
The structure of the pin member 40 is shown in FIG. 2 (a), FIG. 2 (b), FIG. 4 (a), FIG. The pin member 40 includes a front end portion 41, a body portion 42 and a rear end portion 43. The material of the pin member 40 may be resin or metal. As shown in FIG. 2A, a spring locking flange 44 is provided at an intermediate portion of the body portion 42 of the pin member 40, and a spring 45 inserted into the body portion 42 from the tip portion 41 of the pin member 40. Is locked by a spring locking flange 44. The body portion 42 has a cylindrical shape, and the front end portion 41 is an end surface perpendicular to the body portion 42, but the rear end portion 43 has a tapered portion 43 </ b> T whose diameter gradually increases with respect to the body portion 42. The inclination angle of the taper portion 43T of the pin member 40 is equal to the inclination angle of the taper portion 23T of the second tubular member 20.

(Lock member)
The structure of the locking member 30 is shown in detail in FIGS. 5 (a) to 5 (c). The lock member 30 can be formed of two resin leg members 31 and a metal leaf spring 33. The leg member 31 includes a main body 31H having an inverted triangular shape when viewed from the side, and the inside thereof is a cavity 31C. 5A shows two side views of the two leg members 31 as viewed from the side, and one common front view of the two leg members 31. FIG. A rotating shaft 32 is formed at the lower end of the main body 31H, and a stopper piece 31S is projected from the upper end of the main body 31H. Attachment shafts 34 are provided at both ends of the leaf spring 33.

  As shown in FIG. 5B, the lid member 36 on the outer portion of the main body 31H can be removed with the leg member 31 facing the cavity 31C, and when the lid member 36 is removed from the main body 31H, The leaf spring mounting groove 35 is exposed. When attaching the leaf springs 33 to the two leg members 31, the lid member 36 is removed from the main body 31H, the leaf spring 33 is inserted into the cavity 31C, and the attachment shaft 34 is inserted into the leaf spring attachment groove 35. The cavity 31C is sealed. FIG. 5C shows the lock member 30 after the leg member 31 is assembled. In this state, the leaf spring 33 can be bent about the attachment shaft 34.

  The lock member 30 shown in FIGS. 5A to 5C is formed of two resin leg members 31 and a metal leaf spring 33. The lock member 30 is not shown in FIG. As shown in d), the two leg members 31 and the leaf springs 33 can all be made by resin molding. The main body 31H does not need the cavity 31C, but is provided with the rotating shaft 32 and the stopper piece 31S, and the plate spring 33 is formed of resin to form a plate spring portion 33A.

(Assembly of the second cylindrical member)
The assembly of the rivet 1 including the first tubular member 10, the second tubular member 20, the lock member 30, and the pin member 40 will be described. When assembling the rivet 1, first, the lock member 30 shown in FIG. 4A is put into the lock member accommodation hole 25 of the second cylindrical member 20 as shown in FIG. 4B. At this time, the rotation shaft 32 of the lock member 30 is inserted into the shaft hole 25H provided on the distal end side of the lock member accommodation hole 25 of the second cylindrical member 20, and the stopper piece 31S of the lock member 30 is the lock member accommodation hole. 25 is positioned inside a stopper 25S provided on the rear end side.

  Next, the body portion 42 and the rear end portion 43 of the pin member 40, the spring locking flange 44 and the spring 45 are aligned with the enlarged diameter portion 26E of the second tubular member 20, and one second tubular member 20 is aligned. Into the internal passage 26. In this state, the other second cylindrical member 20 is overlapped with one second cylindrical member 20. FIG. 4C shows a state in which the two second cylindrical members 20 divided into two with the lock member 30 and the pin member 40 interposed therebetween are joined. FIG. 4D shows a state in which the second cylindrical member 20 shown in FIG.

(Rivet assembly)
The second cylindrical member 20 assembled as described above is, as shown in FIG. 2B, the rear end portion 23 of the second cylindrical member 20 in the passage 18 of the first cylindrical member 10. Insert while pressing. When the second tubular member 20 is inserted into the passage 18 of the first tubular member 10, no force is applied to the rear end portion 43 of the pin member 40. When the second cylindrical member 20 is outside the first cylindrical member 10, the two leg members 31 of the locking member 30 built in the distal end peripheral portion 24 of the second cylindrical member 20 are shown in FIG. As shown in FIG. 3, the second cylindrical member 20 protrudes outward from the peripheral portion 24 at the front end.

  On the other hand, when the second cylindrical member 20 is inserted into the passage 18 of the first cylindrical member 10, as shown in FIG. The two leg members 31 of the lock member 30 that has been pushed are pushed by the passage 18. As a result, the two leg members 31 of the lock member 30 rotate around the rotation shaft 32 and are immersed in the lock member accommodation hole 25. At this time, the leaf spring 33 of the lock member 30 rotates around the mounting shaft 34 and is curved downwardly as shown in FIG.

(Combination of plate members using rivets)
Here, the joining operation of the plate-like members using the rivet 1 will be described. Here, the case where the circuit board 7 is attached to the board metal 6 for supporting the board provided at the four corners of the bottom surface 5 of the casing 4 of the electronic device as shown in FIG. The sheet metal 6 is provided in a state of being bent in an L shape from the bottom surface 5, and a mounting hole 6 </ b> H is provided in a portion parallel to the bottom surface 5. An attachment hole 7H is also provided on the circuit board 7 side at a position corresponding to the attachment hole 6H of the sheet metal 6. When the circuit board 7 is mounted on the sheet metal 6, the circuit board 7 is aligned on the sheet metal 6 and the mounting hole 7 H of the circuit board 7 is aligned with the mounting hole 6 H of the sheet metal 6, as shown in FIG. The rivet 1 is inserted into the mounting hole 7H of the circuit board 7 and the mounting hole 6H of the sheet metal 6.

  7A shows a case where the rivet 1 is inserted into the mounting holes 6H and 7H provided in the metal plate 6 and the circuit board 7 when the circuit board 7 is attached and fixed to the metal plate 6 shown in FIG. The state which inserted the 1 cylindrical member 10 is shown. The first tubular member 10 can be inserted into the mounting holes 6H and 7H until the flange 16 is in contact with the circuit board 7. In this state, the second cylindrical member 20 is pushed into the first cylindrical member 10 by pushing the rear end 23 of the second cylindrical member 20 together with the rear end 43 of the pin member 40. At this time, the rear end portion 43 of the pin member 40 is pushed together with the rear end portion 23 of the second tubular member 20 as indicated by the symbol P in FIG. Is prevented from moving relative to the second tubular member 20.

  7B, the second cylindrical member 20 is pushed together with the pin member 40 from the state shown in FIG. 7A to move the second cylindrical member 20 in the passage 18 of the first cylindrical member 10. The operation of opening the distal end portion 11 of the first tubular member 10 is shown. When the distal end portion 21 of the second cylindrical member 20 abuts on the inner surface of the distal end portion 11 of the first tubular member 10, the dome-shaped distal end portion 21 presses the inner surface of the distal end portion 11 of the first tubular member 10. . Since the first cylindrical member 10 is provided with the slit 15 from the distal end portion 11 to the body portion 12, the dome-shaped distal end portion 21 expands the width of the slit 15 and the first cylindrical member 10. The front end portion 11 is pushed open. At this time, the leg member 31 of the lock member 30 is still inside the lock member accommodation hole 25 of the second cylindrical member 20.

  When the second cylindrical member 20 is further pressed, the tapered portion 23T of the second cylindrical member 20 comes into contact with the flange 16 of the first cylindrical member 10. In this state, the second cylindrical member 20 can no longer be pressed, and the distal peripheral portion 24 of the second cylindrical member 20 moves away from the distal end portion 11 of the first cylindrical member 10 as shown in FIG. Protruding. When the distal end peripheral portion 24 of the second tubular member 20 protrudes from the distal end portion 11 of the first tubular member 10, there is nothing to push the leg member 31 of the lock member 30, and the leg member 31 has a restoring force of the leaf spring 33. Projecting outward from the lock member receiving hole 25.

  Thus, in the state where the distal end peripheral portion 24 of the second tubular member 20 protrudes from the distal end portion 11 of the first tubular member 10, the body portion 12 extends from the distal end portion 11 of the first tubular member 10 to the slit 15. Is pushed to the position of the sheet metal 6. As a result, the sheet metal 6 and the circuit board 7 are fastened and fixed by the body 12 of the first cylindrical member 10. Further, in the state where the distal end peripheral portion 24 of the second cylindrical member 20 protrudes from the distal end portion 11 of the first cylindrical member 10, the attachment shaft 34 of the leaf spring 33 rotates and the leaf spring 33 is linearly changed from the curved state. Return to. As a result, the leg member 31 of the lock member 30 rotates around the rotation shaft 32 and opens to the outside of the through hole 14 in the distal end portion 11 of the pushed first tubular member 10. For this reason, even if it is going to pull out the 2nd cylindrical member 20 from the 1st cylindrical member 10 in the state shown in Drawing 7 (c), leg member 31 is a penetration hole in tip part 11 of the 1st cylindrical member 10 14, the second tubular member 20 cannot be pulled out from the first tubular member 10.

  When the leaf spring 33 returns to the linear shape from the curved state and the leg member 31 of the lock member 30 rotates about the rotation shaft 32, the stopper piece 31S of the leg member 31 shown in FIG. It abuts against a stopper 25 </ b> S provided in the member accommodation hole 25. For this reason, the maximum protrusion amount of the leg member 31 from the lock member accommodation hole 25 is always the same even if there is an error in the length of the leaf spring 33. Further, as shown in FIG. 7D, even if the plate thickness T2 of the circuit board 7 is smaller than the plate thickness T1 of the circuit board 7 shown in FIG. From 11, the body 12 is pushed in the same way by the slit 15 to the position of the sheet metal 6. Therefore, the sheet metal 6 and the circuit board 7 are fastened and fixed by the body 12 of the first tubular member 10 regardless of the thickness of the circuit board 7 by setting the length of the slit 15.

(Removal of rivets)
Next, an operation of pulling out the rivet 1 in order to release the coupling of the plate-like member by the rivet 1 will be described. Here, the case where the rivet 1 is pulled out from the state shown in FIG. 7C and the coupling between the sheet metal 6 and the circuit board 7 is released will be described. When pulling out the rivet 1, as shown in FIG. 8A, the rear end portion 43 of the pin member 40 located inside the rear end portion 23 of the second tubular member 20 is pushed as indicated by an arrow Q. The pin member 40 is pushed into the second cylindrical member 20. At this time, the pin member 40 contracts the spring 45 in the enlarged diameter portion 25E and moves the internal passage 26 of the second cylindrical member 20 toward the distal end portion 21 side of the second cylindrical member 20.

  Then, the front end portion 41 of the pin member 40 protrudes into the lock member accommodation hole 25 of the second cylindrical member 20, and is straight outside the through hole 14 at the front end portion 11 of the pushed first cylindrical member 10. The leaf spring 33 extending in a shape is pushed and curved downward. When the leaf spring 33 is convexly curved downward, the leg member 31 of the lock member 30 rotates about the rotation shaft 32, is immersed in the lock member accommodation hole 25, and the leg member 31 is in the first tubular member 10. No longer engages with the through hole 14 in the tip 11.

  When the second tubular member 20 is pulled up with respect to the first tubular member 10 in a state where the pin member 40 is pushed into the second tubular member 20, as indicated by reference numeral R in FIG. The second cylindrical member 20 in which the leg member 31 is immersed is not locked by the through hole 14 of the first cylindrical member 10. For this reason, the second tubular member 20 can move in the internal passage 26 toward the rear end portion 13 of the first tubular member 10 while shrinking the tip portion 11 of the opened first tubular member 10. . Then, the pressing of the pin member 40 is stopped in a state in which the distal end portion 21 of the second tubular member 20 enters the inside of the distal end portion 11 of the first tubular member 10. Then, the pin member 40 moves in the internal passage 26 of the second cylindrical member 20 to the rear end portion 23 side of the second cylindrical member 20 by the biasing force of the spring 45. The movement of the pin member 40 continues until the spring 45 extends and the spring locking flange 44 contacts the end of the enlarged diameter portion 26E, and when the spring locking flange 44 contacts the end of the enlarged diameter portion 26E, FIG. The state shown in FIG.

  Thereafter, when the second tubular member 20 is moved in the direction of being pulled out from the first tubular member 10, the lock member 30 eventually opposes the locking groove 17 provided in the passage 18 of the first tubular member 10. The leg member 31 of the lock member 30 is rotated by the urging force of the leaf spring 33 and engages with the locking groove 17. Therefore, the second cylindrical member 20 can no longer be pulled out with respect to the first cylindrical member 10, and when the second cylindrical member 20 is further pulled, the first cylindrical member 10 is moved to the sheet metal 6 and the circuit board 7. The mounting holes 6H and 7H can be removed. After the rivet 1 is removed from the joint between the sheet metal 6 and the circuit board 7 by the above operation, the rivet 1 is not damaged and can be reused. When only the second tubular member 20 is to be pulled out from the first tubular member 10, the pin member 40 may be pushed into the second tubular member 20 again in the state shown in FIG.

(Rivets of the second embodiment)
In the rivet 1 of the first embodiment, as shown in FIG. 9A, the rear end portion 23 of the second tubular member 20 has a trumpet shape with a taper portion 23T, and the rear end of the pin member 40 is in the opening. The end 43 is exposed. On the other hand, as shown in FIGS. 9B and 10A, the rivet 2 of the second embodiment has the structure of the rear end portion 23 of the second cylindrical member 20A that is the rivet of the first embodiment. This is different from the structure of the rear end portion 23 of one second cylindrical member 20. That is, in the structure of the rivet 2 of the second embodiment shown in FIG. 10A, the structure below the line DD is the same as the structure of the rivet 1 of the first embodiment. Therefore, members having the same structure as that of the rivet 1 of the first embodiment in the structure of the rivet 2 of the second embodiment are denoted by the same reference numerals as those of the rivet 1 of the first embodiment described with reference to FIGS. The description thereof will be omitted, and only the parts with different structures will be described.

  As shown in FIGS. 9B and 10A, the rear end portion 23 of the second cylindrical member 20A of the second cylindrical member 20A is provided with a large-diameter portion 27 that bulges into a cylindrical shape. The large diameter portion 27 has an end face 27F perpendicular to the axis of the second tubular member 20A. The rear end portion 43 of the pin member 40 is bent at a right angle, and the bent rear end portion 43 protrudes outward from the opening 29 provided on the side surface of the large diameter portion 27 of the second cylindrical member 20A. .

(Combination of plate members using rivets)
FIG. 10 (a) corresponds to FIG. 7 (a) when the rivet 1 of the first embodiment is used, and in the mounting holes 6H, 7H provided in the sheet metal 6 and the circuit board 7, the second embodiment. The state where the first cylindrical member 10 of the rivet 2 is inserted is shown. In the rivet 2 of the second embodiment, in this state, the end surface 27F of the large-diameter portion 27 at the rear end portion 23 of the second cylindrical member 20A is pushed as indicated by the arrow P, so that the second cylindrical member 20A is One cylindrical member 10 may be pushed.

  FIG. 10B corresponds to FIG. 7C when the rivet 1 of the first embodiment is used, and the lower end portion of the large diameter portion 27 of the second cylindrical member 20A is the first cylindrical member 10. The state which contact | abutted to the flange 16 of this is shown. In this state, the second cylindrical member 20 </ b> A can no longer be pressed, and the distal peripheral portion 24 of the second cylindrical member 20 </ b> A protrudes from the distal end portion 11 of the first cylindrical member 10. When the distal end peripheral portion 24 of the second cylindrical member 20A protrudes from the distal end portion 11 of the first cylindrical member 10, there is no thing pushing the leg member 31 of the lock member 30, and the leg member 31 has a restoring force of the leaf spring 33. Projecting outward from the lock member receiving hole 25.

  In the state shown in FIG. 10B, the distal end peripheral portion 24 of the second cylindrical member 20 </ b> A protrudes from the distal end portion 11 of the first cylindrical member 10, and the trunk portion extends from the distal end portion 11 of the first cylindrical member 10. 12 is pushed open to the position of the sheet metal 6 by the slit 15. As a result, the sheet metal 6 and the circuit board 7 are fastened and fixed by the body 12 of the first cylindrical member 10. Further, in a state where the distal end peripheral portion 24 of the second cylindrical member 20A protrudes from the distal end portion 11 of the first cylindrical member 10, the leaf spring 33 is changed from a curved state to a linear shape, and the leg member 31 of the lock member 30 is The first cylindrical member 10 that has been pushed open is opened to the outside of the through hole 14 in the distal end portion 11. For this reason, the second cylindrical member 20 </ b> A cannot be pulled out from the first cylindrical member 10.

(Removal of rivets)
Next, the case where the rivet 2 is pulled out from the state shown in FIG. 10B and the coupling between the sheet metal 6 and the circuit board 7 is released will be described. When the rivet 2 is pulled out, the rear end portion 43 of the pin member 40 located inside the opening 29 of the large diameter portion 27 of the second cylindrical member 20A is indicated by an arrow Q as shown in FIG. The rear end portion 43 of the pin member 40 is moved to the lowermost portion of the opening 29 by pushing. Then, the pin member 40 contracts the spring 45 in the enlarged diameter portion 25E, and moves the internal passage 26 of the second cylindrical member 20A toward the distal end portion 21 side of the second cylindrical member 20A.

  By the movement of the pin member 40, the tip end portion 41 of the pin member 40 protrudes into the lock member accommodation hole 25 of the second cylindrical member 20A, and the leaf spring 33 is pushed to be bent downward. When the leaf spring 33 is curved downward, the leg member 31 of the lock member 30 is immersed in the lock member receiving hole 25, and the leg member 31 is engaged with the through hole 14 at the distal end portion 11 of the first tubular member 10. It will not match.

  In a state where the pin member 40 is pushed into the second cylindrical member 20, the large-diameter portion 27 of the second cylindrical member 20 is formed on the first cylindrical member 10 as indicated by a symbol R in FIG. Pull up against it. At this time, since the second cylindrical member 20A in which the leg member 31 is immersed is not locked by the through hole 14 of the first cylindrical member 10, the second cylindrical member 20A is The inside of the internal passage 26 can be moved toward the rear end portion 13 of the first tubular member 10 while the front end portion 11 is contracted. When the distal end portion 21 of the second tubular member 20A enters the interior of the distal end portion 11 of the first tubular member 10, the pin member 40 is moved into the internal passage 26 of the second tubular member 20A by the biasing force of the spring 45. Is automatically moved to the rear end portion 23 side of the second tubular member 20. When the spring locking flange 44 comes into contact with the end of the enlarged diameter portion 26E, the state shown in FIG.

  After that, when the second tubular member 20A is moved in the direction of being pulled out from the first tubular member 10, the lock member 30 faces the locking groove 17 provided in the passage 18 of the first tubular member 10. The leg member 31 of the lock member 30 is rotated by the urging force of the leaf spring 33 and engages with the locking groove 17. For this reason, the second cylindrical member 20A can no longer be pulled out with respect to the first cylindrical member 10, and when the second cylindrical member 20A is further pulled, the first cylindrical member 10 is removed from the sheet metal 6 and the circuit board 7. The mounting holes 6H and 7H can be removed. After the rivet 2 is removed from the joint between the sheet metal 6 and the circuit board 7 by the above operation, the rivet 2 is not damaged and can be reused. When only the second tubular member 20A is to be pulled out from the first tubular member 10, the rear end portion 43 of the pin member 40 is again placed inside the opening 29 in the state shown in FIG. What is necessary is just to move to the front-end | tip part 21 side of 20-A of shaped members.

  FIG. 11 shows a rivet 2A of a modified embodiment of the rivet 2 of the second embodiment. The rivet 2A of the modified embodiment is different from the rivet 2 of the second embodiment in the position of the spring 45 that returns the pin member 40 to the original position. In the rivet 2 of the second embodiment, similarly to the rivet 1 of the first embodiment, the spring 45 for returning the pin member 40 to the original position is the enlarged diameter portion 26E in the internal passage 26 of the second cylindrical member 20A. And is engaged with the spring locking flange 44 of the pin member 40.

  On the other hand, in the rivet 2A of the modified embodiment, the axial length of the large diameter portion 27 of the second cylindrical member 20B is extended, and the spring 45 is wound around the body portion 42 of the pin member 40 in the opening 29. . The length of the large diameter portion 27 in the axial direction is extended by the entire length when the spring 45 contracts. Since the operation of the rivet 2A of the modified embodiment is the same as that of the rivet 2 of the second embodiment, the description thereof is omitted. Thus, the position and type of the spring 45 for returning the pin member 40 to the original position are not particularly limited. In addition to the spring, the spring 45 may be a plate spring or a rubber member.

  The present application has been described in detail with particular reference to preferred embodiments thereof. For easy understanding of the present application, specific forms of the present application are appended below.

(Supplementary Note 1) A first tubular member that includes a closed front end portion and a body portion and a rear end portion that bulges, and is provided with a plurality of slits from the front end portion toward the body portion;
The first cylindrical member has an overall length longer than the first cylindrical member, moves in the first cylindrical member, and the first projecting portion projects from the distal end portion of the first cylindrical member through the slit. A second cylindrical member that widens the tip of the cylindrical member;
The second cylindrical member is incorporated in the periphery of the distal end of the second cylindrical member, and the distal end of the second cylindrical member is protruded from the distal end of the first cylindrical member. A leg protruding from the outer peripheral surface engages with a widened tip of the first cylindrical member, and the second cylindrical member is engaged with the tip protruding from the tip of the first cylindrical member. A locking member to stop;
The second cylindrical member is movably provided inside the second cylindrical member, is moved from the rear end side of the second cylindrical member and moves in the second cylindrical member, and a tip portion thereof is the second cylindrical member. A pin member that releases the locking of the second tubular member by the lock member in a state of protruding from the distal end side of
The first tubular member is inserted into a coupling hole provided in a plurality of coupled members, the second tubular member is moved, and the second tubular member is moved to the first tubular member by the lock member. A rivet that locks against and couples the plurality of members to be coupled, and moves the pin member to project from the distal end side of the second tubular member when the coupling is released.
(Supplementary Note 2) The first cylindrical member includes a through hole in the closed tip portion, and the slit is provided radially from the edge of the through hole toward the body portion,
The second cylindrical member has a tapered shape at the tip periphery.
The locking member is configured such that when the tapered peripheral portion of the tip is located in the first tubular member, the leg portion is positioned in the tapered peripheral portion of the tip by contraction of the biasing member, The leg portion protrudes from the tapered tip peripheral portion by the extension of the biasing member in a state where the tip peripheral portion protrudes from the tip portion of the first cylindrical member,
The rivet according to supplementary note 1, wherein a tip portion of the pin member protrudes from a tip side of the second tubular member and presses the biasing member to contract the biasing member.
(Additional remark 3) Two said leg parts of the said lock member are provided so that it may protrude from the opening part provided in the opposing position of the said front-end | tip peripheral part of a tapered shape, The base part is the front-end | tip of a said 2nd cylindrical member It is rotatably supported by the opening on the side, and its free end is connected by a leaf spring,
When the peripheral portion of the distal end of the tapered spring is located in the first tubular member, the distal end portion of the leg portion is pressed against the inner wall of the first tubular member and contracts to form a tapered shape. The rivet according to appendix 2, wherein when the peripheral portion of the tip protrudes from the tip of the first cylindrical member, the pin member protrudes from the tip of the second cylindrical member and contracts.
(Supplementary note 4) The rivet according to supplementary note 3, wherein the lock member is formed of a synthetic resin, and the leaf spring is formed integrally with the two leg portions.
(Supplementary note 5) The rivet according to supplementary note 3, wherein two leg portions of the lock member are formed of synthetic resin, and both end portions of the leaf spring are pivotally supported by a rotation shaft between tip ends of the two leg portions. .

(Additional remark 6) The said pin member is hold | maintained in the said 2nd cylindrical member in the state urged | biased by the said urging member, and the edge part of the front end side of the said pin member leaves | separates from the said lock member in this state The rivet according to any one of appendices 1 to 5 in the above position.
(Additional remark 7) The rear-end part side of the said 2nd cylindrical member is bulged, The end surface of the rear-end side of the said pin member is the same surface as the rear-end surface of the said 2nd cylindrical member, or the said 2nd cylindrical location The rivet according to appendix 6, which is located on the front end side of the rear end surface of the member.
(Supplementary Note 8) The rear end portion side of the second cylindrical member is closed to form an end surface, and the second cylindrical member is disposed on the body portion in the vicinity of the end surface on the rear end portion side of the second cylindrical member. A slide hole extending in the axial direction is provided,
The end portion on the rear end side of the pin member is bent to form a lever portion,
The rivet according to appendix 6, wherein the free end of the lever portion is located on the rear end side of the slide hole and can be moved to the front end side of the slide hole by an external slide operation.
(Additional remark 9) The said biasing member is a rivet of Additional remark 6 accommodated in the space formed by expanding the inner peripheral surface in a said 2nd cylindrical member.
(Additional remark 10) The said 2nd cylindrical member is formed in the state divided into right and left by the surface which passes along the axis line, and the said additional pin is combined in the state accommodated in the said 2nd cylindrical member. The rivet according to any one of 1 to 9.

  (Additional remark 11) When the said 2nd cylindrical member moves to the internal peripheral surface at the said rear end part side of the said trunk | drum of the said 1st cylindrical member in the direction pulled out from the said 1st cylindrical member, 11. The rivet according to any one of appendices 1 to 10, wherein a locking groove that receives the leg portion of the locking member and locks the further movement of the second cylindrical member is provided.

1, 2, 2A Rivet 6 Sheet metal 6H, 7H Mounting hole 7 Circuit board 10 First cylindrical member 14 Through hole 15 Slit 17 Locking groove 20 Second cylindrical member 25 Lock member accommodation hole 30 Lock member 31 Leg member 33 Plate Spring 40 Pin member

Claims (6)

A first cylindrical member provided with a closed front end portion, a trunk portion, and a rear end portion provided with a bulging portion, and provided with a plurality of slits from the front end portion toward the trunk portion;
The first cylindrical member has an overall length longer than the first cylindrical member, moves in the first cylindrical member, and the first projecting portion projects from the distal end portion of the first cylindrical member through the slit. A second cylindrical member that widens the tip of the cylindrical member;
The second cylindrical member is incorporated in the periphery of the distal end of the second cylindrical member, and the distal end of the second cylindrical member is protruded from the distal end of the first cylindrical member. A leg protruding from the outer peripheral surface engages with a widened tip of the first cylindrical member, and the second cylindrical member is engaged with the tip protruding from the tip of the first cylindrical member. A locking member to stop;
The second cylindrical member is movably provided inside the second cylindrical member, is moved from the rear end side of the second cylindrical member and moves in the second cylindrical member, and a tip portion thereof is the second cylindrical member. A pin member that releases the locking of the second tubular member by the lock member in a state of protruding from the distal end side of
The first tubular member is inserted into a coupling hole provided in a plurality of coupled members, the second tubular member is moved, and the second tubular member is moved to the first tubular member by the lock member. A rivet that locks against and couples the plurality of members to be coupled, and moves the pin member to project from the distal end side of the second tubular member when the coupling is released. The first tubular member includes a through hole at the closed tip, and the slits are provided radially from the edge of the through hole toward the body part,
The second cylindrical member has a tapered shape at the tip periphery.
The locking member is configured such that when the tapered peripheral portion of the distal end is positioned in the first cylindrical member, the leg portion is positioned in the tapered peripheral portion of the distal end by contraction of a leaf spring , and the tapered distal end In a state where the peripheral portion protrudes from the distal end portion of the first tubular member, the leg portion protrudes from the distal peripheral portion of the tapered shape by extension of the leaf spring ,
It said pin member is a rivet according to claim 1 for contracting said leaf spring by the distal end pushes the plate spring projects from the distal end side of the second tubular member. Two of the leg portions of the lock member are provided so as to protrude from an opening provided at a position opposed to the tapered peripheral portion of the tip, and the base thereof is the opening on the tip side of the second cylindrical member. rotatably is supported by a part, its free end is connected with the leaf spring,
When the peripheral portion of the distal end of the tapered spring is located in the first tubular member, the distal end portion of the leg portion is pressed against the inner wall of the first tubular member and contracts to form a tapered shape. 3. The rivet according to claim 2, wherein when the tip peripheral portion of the first cylindrical member protrudes from the tip end portion of the first cylindrical member, the pin member protrudes from the tip side of the second cylindrical member and contracts. . The pin member is held in the second cylindrical member in a state of being urged by a urging member , and in this state, an end portion on the tip side of the pin member is located at a position away from the lock member. Item 4. The rivet according to any one of items 1 to 3.   The said 2nd cylindrical member is formed in the state divided into right and left by the surface which passes along the axis line, and it couple | bonds in the state in which the said pin member was accommodated in the said 2nd cylindrical member. The rivet according to any one of the above.   On the inner peripheral surface of the first tubular member on the rear end side of the body portion, when the second tubular member moves in the direction of being pulled out from the first tubular member, the lock member The rivet according to any one of claims 1 to 5, further comprising a locking groove that receives the leg portion and locks the further movement of the second cylindrical member.

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