JP5402707B2 - Locking device - Google Patents

Description

  The present invention relates to a locking device. Specifically, the present invention relates to a locking device that is provided on one of two members that are locked to each other and that receives and locks a striker provided on the other member.

  As this type of locking device, for example, a technique disclosed in Patent Document 1 below is known. In this disclosure, the locking device includes a base plate having a recess capable of receiving a striker, and a hook and a pole that are rotatably supported by an individual support shaft with respect to the base plate. The hooks and poles described above are normally urged to rotate in directions opposite to each other by the biasing force of the spring, and the hook is rotated with a part of its shape protruding into the recess of the base plate by the biasing force. It is held in a posture state.

  The hook is pushed by a movement in which the striker is relatively pushed into the recess of the base plate, and a part of the shape is turned to the rear side of the striker to close the recess, and in this closed position, When the pole is engaged by urging, it is held in a state (locked state) in which rotation is stopped by the pole. Further, the locking device described above is provided with a driving-in plate that drives the hook in the locked state further in the rotation direction of the lock and closes the gap with the striker to eliminate backlash.

  The driving plate is rotatably supported by a support shaft different from the support shaft of the pole described above, and engages with the hook in conjunction with the movement of the pole engaging the hook by biasing. The hook is further pushed in the lock rotation direction and driven by this rotation.

JP 2009-57039 A

  However, the prior art disclosed above has a configuration in which a driving plate and a support shaft are separately added in order to drive the hook in the lock rotation direction, and there is a problem that the number of parts of the locking device increases. .

  The present invention has been devised as a solution to the above-described problems, and the problem to be solved by the present invention is to engage the hook with the striker without increasing the number of parts of the locking device. Then, it is driven further in the lock rotation direction to lock the striker in a loose state.

In order to solve the above problems, the locking device of the present invention takes the following means.
First, the first invention is a locking device that is provided on one of two members that are locked to each other and that receives and locks a striker provided on the other, and includes a base plate, a pole, and a hook. The base plate is configured to have a recess capable of receiving a striker, the pole is rotatably supported on the base plate by a first support shaft, and the hook is rotatable on the base plate by a second support shaft. It is provided to be supported by the shaft. The hook is configured to be in a state where the striker is pushed and rotated by the movement of entering the recess of the base plate, and the striker is sandwiched between the hook and the recess. When the hook rotates to the position where the striker is clamped, the pole rotates to a position where the engaging portion is engaged with the hook by urging, and the lock is in a locked state in which return rotation of the hook is restricted. With the rotation, the pushing surface is pressed against the driven surface formed on the hook to push the hook further in the direction of locking rotation, and the striker is pressed against the back side surface of the recess. Yes. The engaging portion of the pole comes into contact with the hook through deformation of the pole or hook when a strong force is applied between the striker and the hook so that the hook returns and is forced to move in the rotational direction. The movement in the return rotation direction is prevented to prevent the striker from moving out of the recess.

  According to the first invention, when the striker enters the recess of the base plate, the hook is pushed around, and the hook is sandwiched between the recess and the striker. And by this rotation of the hook, the pole is rotated by the biasing force, and the engaging portion is engaged with the hook and the return rotation of the hook is restricted (locked state), and the pushing surface is pushed into the hook. By pressing against the surface, the hook is further driven in the direction of locking rotation, and the striker is pressed against the back side surface of the recess and held. In this way, using the configuration of the hook and pole, without increasing the number of parts of the locking device, the hook is driven further from the engagement lock state with the striker in the lock rotation direction, and the striker is loosely packed. Thus, a configuration that can be locked can be obtained. Then, in the state where the hook is locked in the rotational posture position driven by the pole as described above, the hook is pressed with a strong force with forced displacement in the direction of returning and rotating by the striker. The pole or hook in contact with the surface is deformed, and the hook comes into contact with the engaging portion of the pole. Thereby, since the movement of the hook in the return rotation direction is blocked by the support force of the engaging portion of the pole, it is possible to prevent the striker from moving out of the recess.

  Next, according to a second aspect of the present invention, in the first aspect described above, the hook is exposed to the concave portion of the base plate in the initial state before the lock rotation, and is pushed by the striker that enters the concave portion, A lower jaw portion that is turned into the recess when the upper jaw portion is pushed and sandwiches the striker with the inner side surface of the recess. The engaging portion of the pole is configured to be engaged with an engaged portion formed on the outer peripheral lower surface of the lower jaw portion of the hook by rotation due to the biasing to restrict the return rotation of the hook. The driving surface is pressed against the driven surface formed on the upper jaw portion of the hook by the rotation by the biasing force, and as the biasing rotation proceeds, the driven surface is pressed to further lock and rotate the hook. It is configured to drive into. When a strong force is applied between the striker and the hook so that the hook returns and is pushed in the rotational direction with forced displacement, the upper jaw part of the hook or a part of the pole in contact with the upper jaw part is deformed, The engaged portion of the hook comes into contact with the engaging portion of the pole, and the hook is prevented from moving in the return rotation direction.

  According to the second aspect of the invention, in the state where the hook is driven and locked by the follow-up surface of the pole, a strong force with a forced displacement in the rotational direction is applied to the hook from the striker. Part of the pole that is in contact with the upper part or the upper jaw part is deformed, and the engaged part of the hook comes into contact with the engaging part of the pole, and the movement of the hook in the return rotation direction is prevented. In this way, the lower jaw portion of the hook is configured such that the hook is forcibly displaced in the return rotation direction without deforming the lower jaw portion of the hook and brought into contact with the engaging portion of the pole to prevent the return rotation. Therefore, the striker can be more reliably prevented from coming off.

It is a side view of the vehicle seat to which the locking device of Example 1 was applied. It is a disassembled perspective view of a locking device. It is a lock state figure of a locking device. It is a releasing state figure of a locking device. It is the state figure which showed the deformation | transformation aspect at the time of the heavy load effect | action of a locking device. It is a lock state figure of the locking device of Example 2. It is a releasing state figure of a locking device. It is the state figure which showed the deformation | transformation aspect at the time of the heavy load effect | action of a locking device.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.

  First, the configuration of the locking device 5 according to the first embodiment will be described with reference to FIGS. As shown in FIG. 1, the lock device 5 of the present embodiment is provided in the vehicle seat 1, and is engaged and locked with the striker S installed on the floor F, so that the vehicle The seat 1 is provided with a configuration that can be engaged and locked with the floor F. Here, the vehicle seat 1 is configured to include a seat back 2 that serves as a backrest and a seat cushion 3 that serves as a seating portion, and both left and right side portions on the front end side of the seat cushion 3 are fixedly installed on the floor F. The support base 4 is hingedly connected to the support base 4.

  The vehicle seat 1 is provided with the locking devices 5 described above on the left and right side portions on the rear end side of the seat cushion 3, and these locking devices 5 are normally engaged with the striker S on the floor F. By being in the locked state, the seat cushion 3 is locked and held in a posture state in which the seat cushion 3 is lying on the floor F. The lock devices 5 are configured to release the engagement lock state with respect to the striker S by operating a release lever (not shown) provided on the vehicle seat 1.

  Specifically, by operating the release lever (not shown) described above, the vehicle seat 1 is switched to a posture state in which the seat back 2 is tilted forward and folded into the upper surface portion of the seat cushion 3. The engagement lock state with respect to the striker S of the locking device 5 is released simultaneously. Thereby, the vehicle seat 1 is in a state of being flipped up from the floor F to the vehicle front side around the connection point 4A with the support base 4 described above.

  As a result, the vehicle seat 1 is stowed up from the floor F by being flipped up to the front side of the vehicle by the biasing force of a biasing spring (not shown) provided at the connecting portion with the support base 4. Is switched and held. Then, the vehicular seat 1 in the retracted posture is brought down onto the floor F against the force of the urging spring, and the respective locking devices 5 described above are brought into the respective strikers S on the floor F. By being pushed in and engaged and locked, it is held in the posture state of being pushed down on the floor F again.

  Specifically, each locking device 5 described above is configured to operate so as to be engaged and locked with each striker S by being pushed toward each striker S so that the internal lock structure is pushed by each striker S. It has become. Hereinafter, the configuration of each locking device 5 described above will be described in detail with reference to FIGS. 1 and 3 to 5, in order to show the configuration of the locking device 5 in an easy-to-understand manner, a plate piece on one side serving as a lid side of a base plate 10 formed by a set of two pieces (described later) (see FIG. 2) is omitted.

  Here, as shown in FIGS. 1 to 2, the locking device 5 is a pair of plate-like base plates 10 that are integrally fixed to the skeleton frame of the seat cushion 3, and the base plate 10. A hook 20 that is rotatably supported by the second support shaft 21, a pole 30 that is rotatably supported by the first support shaft 31 with respect to the base plate 10, and the pole 30 and the hook 20. And a tension spring 40 that acts to urge them in opposite directions of rotation.

  As shown in FIG. 4, the hook 20 is normally urged to rotate counterclockwise by the urging force of the tension spring 40 that is hooked between the hook 30 and the pole 30, and is formed on the base plate 10. The rotation is stopped and held at the initial rotation posture position that contacts the stopper 13. In this initial rotational posture state, the hook 20 is held in a state where the upper jaw portion 22 projects into the recess 11 of the base plate 10. As a result, the hook 20 receives the movement of the striker S entering the recess 11 of the base plate 10, and the upper jaw portion 22 is pressed by the striker S upward in the figure to rotate. As a result of this rotation, as shown in FIG. 3, the hook 20 enters the recess 11 of the base plate 10 so that the lower jaw 23 is turned to the back side of the striker S, and the striker S is moved to the upper jaw. The state is received in the receiving port 24 between the portion 22 and the lower jaw portion 23, and the rotation is stopped by the pole 30, and the striker S is prevented from coming off and is held in the locked state.

  On the other hand, as shown in FIG. 4, the pole 30 is normally urged to rotate clockwise by the urging force of the tension spring 40 hooked between the pole 30 and the upper jaw of the hook 20. It is held in a state in which the rotation is stopped at an initial rotation posture position that is pressed against and engaged with the front end surface of 22. 3, the hook 20 is pushed by the striker S as described above, and the upper jaw portion 22 is removed from the state in contact with the pole 30 as described above. The engaging convex portion 32 that is formed to project at the lower end portion of the hook 20 abuts on the outer peripheral lower surface (the engaged portion 23 </ b> A) of the lower jaw portion 23 of the hook 20 and is engaged with the hook 20. It will be in the state. Here, the engagement convex portion 32 corresponds to the engagement portion of the present invention.

  Accordingly, the engagement restricts the rotational movement of the hook 20 to be returned in the counterclockwise direction shown in the figure by the biasing force action of the tension spring 40, and the striker S is disengaged from the engagement state with the hook 20. It is locked in a state where it is not held. Further, as shown in FIG. 3, the above-described pole 30 has an inclination formed on the upper side surface thereof as the engaging convex portion 32 is pressed against the engaged portion 23 </ b> A of the hook 20 by urging. The planar follow-up surface 33 is pressed against the inclined follow-up surface 22A formed on the lower end surface of the upper jaw portion 22 of the hook 20, and the follow-up surface is accompanied with the progress of the urging rotation. 22A is gradually pushed upward, and the hook 20 is further driven in the direction of locking rotation.

  As a result, the hook 20 further moves from the state in which the engaging projection 32 of the pole 30 is pressed against the above-described engaged portion 23A and the above-described return rotation is restricted (engaged locked state). As a result, the lock rotation is deepened (turned into the direction side). Then, by this driving rotation, the hook 20 pushes up the striker S by the lower jaw part 23 and presses it against the back side surface 11A of the recess 11 of the base plate 10, and the striker S is pushed into the back side surface 11A of the lower jaw part 23 and the recess 11. It is held in a state where it is pressed and clamped so as not to rattle between.

  In this state, even if the hook 20 receives a force in the return rotation direction due to the urging force action of the tension spring 40, the hook 20 is locked so as not to return and rotate due to the contact structure between the upper jaw portion 22 and the follow-up surface 33 of the pole 30. It has come to be. That is, the hook 20 is in contact with the pole 30 in relation to the contact angle between the driven surface 22A of the upper jaw portion 22 and the driven surface 33 of the pole 30 (by the biasing rotation of the pole 30 in the clockwise direction). The driven surface 22A of the upper jaw 22 can be rotated around the second support shaft 21 by the relationship of the contact angle between the driven surface 22A and the driven surface 22A. Thus, even if the follow-up surface 33 of the pole 30 is pressed in the counterclockwise direction, the pole 30 cannot be pushed and moved in the counterclockwise direction.

  As a result, the blocking force for blocking the return rotation of the hook 20 that has been driven further in the lock rotation direction from the locked engagement state with the pawl 30 has a pushing surface 33 between the upper jaw portion 22 and the pawl 30. It is secured by the contact structure. The abutment structure of the hook 20 that prevents the return rotation of the hook 20 by the abutment of the upper jaw portion 22 of the hook 30 and the follow-up surface 33 of the pole 30 is a vibration load generated in a normal use environment such as when the vehicle is running. Due to the action of the above, the striker S has a supporting strength that can prevent the return rotation of the hook 20 with a stable force even when a force is applied to press the lower jaw portion 23 of the hook 20 in the return rotation direction. It is said that.

  However, the state where the return rotation of the hook 20 is prevented is destroyed by pressing the lower jaw portion 23 of the hook 20 with a strong force accompanied by a forced displacement in the direction of the return rotation by the striker S due to the occurrence of a vehicle collision or the like. . Specifically, as shown in FIG. 5, the hook 20 has a wall thickness greater than that of the lower jaw portion 23 when the lower jaw portion 23 is pressed in the return rotation direction by the striker S with a strong force accompanied by the forced displacement. Is deformed in a manner that the upper jaw portion 22 is formed in a thin shape and the tip end portion is supported from below by the pole 30 and is bent downward. Here, the upper jaw portion 22 of the hook 20 is formed in a straight shape in which an upper side surface and a lower side surface extending in an arm shape extend in parallel with each other, and when receiving a strong force with the forced displacement, It is easy to bend and deform.

  As a result of this deformation, the entire hook 20 returns and displaces in the rotational direction, and the engaged portion 23A formed on the outer peripheral lower surface of the lower jaw portion 23 of the hook 20 contacts the engaging convex portion 32 of the pole 30. It will be in the state. As a result, the movement of the hook 20 in the return rotation direction is locked while the lower jaw portion 23 is kept closed with the recess 11 of the base plate 10, and the striker S does not come out of the recess 11. The lock device 5 is kept engaged and locked.

  Here, the abutting structure in which the engaged portion 23A of the hook 20 is in contact with the engaging convex portion 32 of the pole 30 is determined so that the engaged portion 23A is the second due to the relationship between the abutting angles. Even if the engagement convex portion 32 is pressed counterclockwise by rotation around the support shaft 21, the pole 30 cannot be pushed and moved counterclockwise. Specifically, the engaging convex portion 32 is drawn around the first support shaft 31, which is the rotation center of the pole 30, with the outer peripheral surface serving as the contact surface of the hook 20 with the engaged portion 23 </ b> A. It is formed in a curved shape in the shape of an arc. Thereby, even if the engaged portion 23A of the hook 20 is pressed against the engaging convex portion 32, the load acts toward the first support shaft 31, and the pole 30 is affected by the load. It is not pushed and moved in the direction of rotation. And even if both the lower jaw part 23 in which the engaged part 23A of the hook 20 described above is formed and the engaging convex part 32 of the pole 30 are in contact with each other due to the action of the large load described above, It is formed in a shape having a sufficient shape and thickness so as not to be deformed, so that the large load described above can be reliably received.

  Hereinafter, each configuration of the locking device 5 will be described in order. First, the configuration of the base plate 10 will be described. As shown in FIG. 2, the base plate 10 is composed of a set of two pieces, and each base plate 10 is integrally connected to the skeleton frame of the seat cushion 3 (see FIG. 1). Then, sandwiched between the two base plates 10, the hook 20 and the pole 30 are rotatably connected to each other by a second support shaft 21 and a first support shaft 31. Each of the two base plates 10 is formed by cutting out a recess 11 capable of receiving the striker S described above.

  As shown in FIG. 4, the width of the lower end side opening that receives the striker S is larger than the cross-sectional diameter of the striker S, and the width of the recesses 11 increases toward the depth side that is the upper end side. It is formed in a tapered shape that is gradually narrowed to a width that becomes narrower than the cross-sectional diameter of the striker S. Next, returning to FIG. 2, the configuration of the hook 20 will be described. The hook 20 is provided on the base plate 10 so as to be rotatably connected to the base plate 10 by a second support shaft 21.

  As shown in FIG. 4, the hook 20 described above is normally in a state of being urged to rotate counterclockwise by the urging force of the tension spring 40 hooked between the hook 20 and the pole 30. At the initial stage before the striker S enters the recess 11 of the base plate 10, the rotational movement due to the biasing is locked at a position where the striker S is cut and raised at the right edge of the base plate 10. It is held in a state.

  In an initial state in which the hook 20 is prevented from rotating by the stopper 13, the hook 20 has an upper jaw portion 22 formed in the shape of an arm extending outwardly in the radial direction from the outer peripheral portion thereof, and the recess 11 of the base plate 10. It is held in a posture state projecting inside. As a result, when the striker S enters the recess 11 of the base plate 10 from the initial rotational position state described above, the upper jaw portion 22 is pressed by the striker S, and the tension spring 40 is attached. It is pushed in the clockwise direction in the figure against the force.

  Then, the hook 20 is rotated in the clockwise direction shown in the drawing by the tip portion of the upper jaw portion 22 so that the pole 30 pressed against the upper jaw portion 22 is pushed and released in the counterclockwise direction shown in the drawing. The part 22 rotates to a position where it goes over the pole 30 upward in the figure. As a result, the pole 30 is removed from the state in which it is pressed against the upper jaw 22 and can be rotated in the clockwise direction in the figure by the bias.

  On the other hand, the hook 20 rotates the lower jaw portion 23 that is formed in an arm shape separately from the upper jaw portion 22 to the rear side of the striker S by being rotated in the illustrated clockwise direction by the striker S. The striker S is received in the receiving port 24 between the upper jaw 22 and the striker S. The rotation of the hook 20 rotates to a position where the upper jaw portion 22 rides over the pole 30 upward in the figure, so that the pole 30 removed from contact with the upper jaw portion 22 is rotated in the clockwise direction in the figure by biasing. As a result of the movement, the engaging convex portion 32 of the pole 30 comes into contact with and engages with the engaged portion 23A formed on the outer peripheral lower surface of the lower jaw portion 23 of the hook 20. As a result, the hook 20 is in a state (engagement lock state) in which movement in the return rotation direction is restricted by the engagement between the engagement convex portion 32 and the engaged portion 23A.

  As the engaging protrusion 32 of the pole 30 is pressed against the engaged portion 23A of the hook 20 by the biasing force, an inclined driving surface 33 formed on the upper end side surface of the pole 30 is formed. Then, it is pressed against the inclined driven surface 22A formed on the lower surface of the upper jaw portion 22 of the hook 20 and gradually pushes the driven surface 22A upward as the biasing rotation proceeds. Then, the hook 20 is driven in the direction of further locking rotation from the engagement lock position.

  As a result, as shown in FIG. 3, the lower jaw portion 23 of the hook 20 pushes the striker S toward the back side of the recess 11 and presses the striker S against the back side surface 11 </ b> A of the recess 11. It will be in the state which pressed and clamped so that it may not rattle between 11A. In this state, the hook 20 is supported so as not to rotate back by the follow-up surface 33 of the pole 30 that presses the hook 20 in the push-in rotation direction so that the striker S is not rattled in the recess 11. Is held in a locked state.

  As shown in FIG. 2, the pole 30 described above is provided with an arm-like operation piece 34 so as to be integrated therewith, and one end 41 of the tension spring 40 is hooked on the operation piece 34. In addition, the end portion of the operation cable Ca for removing the pole 30 from the engaged state with the hook 20 is hooked. Specifically, the operation piece 34 is passed through the first support shaft 31 together with the pole 30 and is rotatably supported, and a projection 30A formed so as to protrude from the pole 30 in the axial direction has a hole 34A. It is configured so that it can be fitted with the pole 30 and overlapped with the pole 30 in a plate-like manner so that it can rotate integrally with the pole 30.

  Further, the operation piece 34 described above is formed in a shape extending longer than the pole 30, and one end 41 of the tension spring 40 is provided at a location projecting radially outward from the driving surface 33 of the pole 30. Is formed, and a cable hook 34C for hooking the end of the cable Ca is formed at the tip of the hole. Note that the other end 42 of the tension spring 40 is hooked and fixed to a hook-shaped spring hook 25 formed on the outer peripheral portion of the hook 20 on the upper side in the figure.

  As a result, the pole 30 is normally in a state of being urged to rotate in the clockwise direction shown in FIGS. 3 to 4 by the urging force of the tension spring 40 hooked between the pole 30 and the hook 20. As shown in FIG. 3, when the hook 20 is pushed clockwise by the striker S, the pawl 30 causes the engaging protrusion 32 to be engaged with the engaged portion 23A of the hook 20 by urging. In addition to being brought into contact with each other, the driving surface 33 is pressed against the driven surface 22A, and the hook 20 can be pushed up in the driving rotation direction by the action of the urging force.

  The engagement state between the pole 30 and the hook 20 is determined by pulling the cable Ca hooked on the operation piece 34 described above by operating the release lever (not shown). It is rotated counterclockwise in the figure against the urging force of the tension spring 40 and is released from the engaged state with the hook 20 (see FIG. 4), so that the engaged state of both is released. ing. Here, the cable Ca has a double structure in which a wire-like inner cable is inserted into an annular outer cable, and an end portion of the outer cable serving as a guide tube extends from the illustrated left side edge of the base plate 10. The end of the inner cable that is hooked and fixed to the cable hook 12 that is formed and is connected to the release lever is hooked to the cable hook 34C on the distal end side of the operation piece 34. It has a fixed configuration.

  Then, when the pole 30 is removed from the engaged state with the hook 20 by the operation of the cable Ca described above, the hook 20 is rotated in the clockwise direction shown in FIG. 4 by the urging force of the tension spring 40 as shown in FIG. Then, the hook 20 pushes out the striker S to the lower side in the figure by the upper jaw portion 22, and the lower jaw portion 23 is retracted to the outside of the recessed portion 11 to release the state where the striker S is pressed into the recessed portion 11. Then, by releasing the operation of the cable Ca after the release operation, the pole 30 is rotated again in the clockwise direction in the figure by the action of the urging force of the tension spring 40 and pressed against the distal end portion of the upper jaw portion 22 of the hook 20. The rotation is stopped and returned to the initial state and held.

  Thus, according to the locking device 5 of the present embodiment, the hook 20 is engaged with the striker S without increasing the number of parts of the locking device 5 using the configuration of the hook 20 and the pole 30. Further, it is possible to obtain a configuration that can be driven further in the lock rotation direction and locked in a state where the striker S is loosely packed. In the state where the hook 20 is locked in the rotational posture position driven by the pole 30 as described above, the hook 20 is pressed by the striker S with a strong force accompanied by a forced displacement in the rotating direction. The upper jaw portion 22 of the hook 20 that is in contact with the follow-up surface 33 of the hook 30 is deformed, and the engaged portion 23A of the hook 20 is in contact with the engaging protrusion of the pole 30.

  Thereby, since the movement of the hook 20 in the return rotation direction is blocked by the support force of the engaging portion of the pole 30, the movement of the striker S being removed from the recess 11 can be blocked. Therefore, in the configuration of the present embodiment, the upper jaw portion 22 is made thinner than the lower jaw portion 23 so as to promote deformation earlier than the lower jaw portion 23 when a large load is input, while the lower jaw portion 23 is The thick wall is formed so that the movement of the hook 20 in the return rotation direction can be surely stopped by the contact of the hook 20 with the engaging projection 32 of the pole 30 when the large load is input. Thereby, even when the said heavy load is input, the striker S can be more reliably prevented from coming off.

  Then, the structure of the locking device 5 of Example 2 is demonstrated using FIGS. In addition, in a present Example, about the location where the substantial structure and effect | action are the same as the locking device 5 demonstrated in Example 1, the same code | symbol is attached | subjected and description is abbreviate | omitted, About a different location This will be explained in detail. As shown in FIGS. 6 to 7, the locking device 5 of the present embodiment is formed such that the follow-up surface 35 </ b> A of the pole 30 protrudes from the upper end portion of the pole 30 in the biasing rotation direction (clockwise direction in the drawing). 8 is formed on the upper side surface of the deformation promoting portion 35, and as shown in FIG. 8, when a heavy load is input, the protruding front surface of the deformation promoting portion 35 that is in contact with the upper jaw portion 22 of the hook 20 The surface 35 A) is pressed downward by the upper jaw portion 22 of the hook 20, the deformation promoting portion 35 is pushed and bent downward, and the engaged portion 23 A of the hook 30 is engaged with the engaging convex portion 32 of the pole 30. It returns to the position where it abuts on the (engaging part) and is rotationally displaced in the rotational direction.

  As shown in FIG. 7, as described above, the deformation promoting portion 35 is formed to protrude from the upper end portion of the pole 30 so that the upper jaw portion 22 of the hook 20 is engaged with the deformation promoting portion 35 in the initial state. The distal end portion of the upper jaw portion 22 rides on the deformation promoting portion 35 so that the lock rotation in the clockwise direction in the drawing is not hindered by entering into the groove 35B between the convex portion 32. A warped portion 22B that warps the shape upward is formed. A driven surface 22A having a curved shape is formed on the outer peripheral side (lower side) between the warped portion 22B and the upper jaw portion 22 so as to round the corner surface.

  As mentioned above, although embodiment of this invention was described using two Examples, this invention can be implemented with various forms other than the said Example. For example, the locking device 5 of the present invention can be applied to a purpose other than the purpose for engaging and locking the vehicle seat 1 to the floor F as shown in the above embodiment. That is, the locking device of the present invention may be used as a locking device that is provided on one of the two members that are locked to each other and that receives and locks the striker provided on the other, and its usage is particularly limited. Is not to be done.

  Further, in each of the above-described embodiments, when a large load is input to the lock device 5, either the hook 20 or the pole 30 is deformed so that the engaged portion 23 </ b> A is engaged with the engagement convex portion 32 (engagement portion). ) Is illustrated as being configured to contact and be received, but both may be configured to be deformed together. Further, the shape of the contact surfaces of both of the follow-up surfaces 33 (35A) of the pole 30 abutting against the follow-up surface 22A of the hook 20 as the biasing rotation proceeds and pressing it in the follow-up rotation direction is at least One contact surface may be formed as a curved surface or a straight inclined surface, and the specific shape is not particularly limited.

  Further, when a large load is input to the locking device 5, the engaged portion 23A of the hook 20 abuts on the engaging convex portion 32 (engaging portion) of the pole 30, and the movement in the return rotation direction is prevented. Even if the pressing force accompanying the movement of the hook 20 in the return rotation direction from the engaged portion 23A of the hook 20 is applied to the engaging convex portion 32 of the pole 30, the pole 30 is pressed against this pressing force. The shape is not particularly limited as long as it has a shape that is not pushed by the screw.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat back 3 Seat cushion 4 Support stand 4A Connection point 5 Locking device 10 Base plate 11 Recess 11A Back side 12 Cable hook 13 Stopper 20 Hook 21 Second spindle 22 Upper jaw 22A Driven surface 22B Warping up Part 23 Lower jaw part 23A Engagement part 24 Receiving port 25 Spring hook part 30 Pole 30A Protrusion 31 First support shaft 32 Engagement convex part (engagement part)
33 Drive surface 34 Operation piece 34A Hole 34B Spring hook portion 34C Cable hook portion 35 Deformation promoting portion 35A Drive surface 35B Groove 40 Tension spring 41 One end 42 The other end Ca cable F Floor S Strike

Claims (1)

A locking device that is provided on one of two members that are locked to each other and that receives and locks a striker provided on the other,
A base plate having a recess capable of receiving the striker;
A pole rotatably supported on the base plate by a first support shaft;
A hook rotatably supported on the base plate by a second support shaft;
The hook is configured to be in a state where the striker is pushed by the movement of entering the recess of the base plate and rotates to sandwich the striker with the recess,
The pole is in a locked state in which the hook is rotated to a position where the striker is sandwiched to rotate to a position where the engaging portion is engaged with the hook by urging, and the return rotation of the hook is restricted. Along with the rotation by the urging force, the driven surface is pressed against the driven surface formed on the hook, and the hook is further driven to lock and keep the striker pressed against the back side surface of the recess. The engaging portion of the pole is applied with a strong force between the striker and the hook, and the hook is pushed and moved in the rotational direction with a forced displacement. The striker comes into contact with the hook through deformation of the hook to prevent the hook from moving in the return rotation direction, and the striker Movement is adapted to prevent that is issued,
The hook includes an upper jaw portion that is exposed to the recess of the base plate in an initial state before the lock rotation and is pushed by the striker that enters the recess, and the upper jaw portion is pushed to turn inside the recess. And a lower jaw part that sandwiches the striker with the back side surface of the recess,
The engaging portion of the pole is configured to engage with an engaged portion formed on an outer peripheral lower surface of the lower jaw portion of the hook by rotation due to the biasing, and to restrict the return rotation of the hook, A direction in which the hook is pressed against the driven surface formed in the upper jaw portion of the hook by rotation by the biasing force, and the hooked surface is further pressed by pressing the driven surface as the biasing rotation proceeds. It is configured to drive into,
A strong force is applied between the striker and the hook so that the hook is pushed and moved in the rotating direction with a forced displacement, so that the upper jaw portion of the hook or one of the poles in contact with the upper jaw portion is applied. The locking device is characterized in that the portion is deformed and the engaged portion of the hook comes into contact with the engaging portion of the pole to prevent the hook from moving in the return rotation direction .

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