JP2011098585A - Lock device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten a release operation stroke of a lock device provided with a play preventing function of a striker when locking. <P>SOLUTION: A pawl 30 composing the lock device 5 is rotatably journaled to a base plate 10 by a first spindle 31, and a hook 20 is rotatably journaled to the base plate 10 along with a driving plate 40 by a second spindle 21 and is interlockable with movement of the driving plate 40. The hook 20 rotates pressed by the movement of a striker S entering a recess 11 of the base plate 10 and becomes a state of holding the striker S between the hook and the recess 11. The pawl 30 rotates to a position engaging with the hook 20 energized by the rotation of the hook 20, and becomes a state restricting the returning rotation of the hook 20. The driving plate 40 rotates pressed by a force of the pawl 30 rotating to the lock direction by energizing, presses the striker S to the inside of the recess 11 and retains it in a state filling the play. <P>COPYRIGHT: (C)2011,JPO&INPIT

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 lock device provided in the seat body is configured to be engaged and locked with the striker installed on the floor. This locking device includes a base plate having a recess capable of receiving a striker, and a hook, a pole, and a driving plate that are rotatably supported by individual support shafts with respect to the base plate.

  The hook described above is normally held in a rotational posture in which a part of its shape projects into the recess of the base plate by the biasing force of the spring applied between the hook and the pole. The hook is pushed by the movement of the striker relatively pushed into the recess of the base plate, and a part of its shape is turned to the back side of the striker to close the recess, and the rotation is stopped by the pole. It is to be kept in the state that has been.

  In addition, the urging force of the spring is applied between the driving plate and the base plate. By applying the driving force in the direction in which the striker that has entered the recess of the base plate closed by the hook is further pushed into the recess, the striker Is pushed into the recess so that the striker does not rattle in the recess. The striker locked state by the locking device described above is released by pulling the cable hung on the drive-in plate, the pole is also pulled by the pulled drive-up plate, and the rotation of the hook by the pole is released. It is like that.

JP 2005-138785 A

  However, in the related art disclosed above, in order to release the lock state of the locking device, the above-described two springs are pulled in order by cable operation, and the components connected to the springs are respectively rotated. Thus, a long stroke is required for the release operation.

  The present invention was devised as a solution to the above-described problems, and the problem to be solved by the present invention is to shorten the release operation stroke of the locking device having a function of preventing the striker from loosening when locked. There is.

In order to solve the above problems, the locking device of the present invention takes the following means.
First, a 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, a driving plate, and a hook. Have. The base plate has a recess capable of receiving a striker. The pole is rotatably supported on the base plate by the first support shaft. The drive-in plate is rotatably supported by the base plate by the second support shaft. The hook is rotatably supported on the base plate by the second support shaft together with the driving plate, and is configured to be interlocked with the movement of the driving plate. The hook is pushed and rotated by the movement of the striker entering the recess of the base plate, and the striker is sandwiched between the hook and the recess. When the hook is rotated to a position where the striker is sandwiched, the pole is rotated to a position where the hook is engaged with the hook by urging, and a lock state in which the return rotation of the hook is restricted is obtained. The driving plate rotates when the pole is pushed by the force rotating in the locking direction by the urging force, and the striker is pushed into the recess and held in a loose state. The engaging surfaces of both the pole and the hook that are engaged with each other to be in a locked state are curved surface shapes in the shape of an arc around the first support shaft that is the center of rotation of the pole. Even if the rotation angle changes, the contact state with each other is maintained in the surface contact state. The contact surface of the two that the pole pushes the driving plate in the backlash direction and has a driving angle where the driving plate is driven in the backlash direction as the rotation of the pole in the lock direction progresses. The shape of the surface.

  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. Then, by the rotation of the hook, the pole is rotated by the urging force, and the locked state is established in which the hook is engaged and the return rotation of the hook is restricted. The pole is then held in a state in which the thrust plate is pushed in the backlash direction by the biasing rotation that engages with the hook, and the striker is pushed further into the back so that it does not rattle between the recesses. To do. The locked state of the hook by the pole and the driven state of the driving plate can be released by rotating the pole in a direction against the bias. As described above, the unlocking operation of the lock device having the striker backlash prevention function can be performed only by the rotation operation of the single pole, and the operation stroke for the unlocking can be shortened. In addition, the engaging surfaces of both the pole and the hook engaged with each other are locked to form a circular arc around the first support shaft that is the center of rotation of the pole, and the rotation angle of the pole changes. Even so, since the surfaces are kept in contact with each other, there is no gap between the two engagement surfaces so that a large load can be received by the contact structure of both engagement surfaces. Can do.

  Next, according to a second aspect of the present invention, in the first aspect described above, the rotational direction of backlashing of the driving plate and the rotational direction of the lock of the pole are both in the same rotational direction as the direction in which the hook is pushed by the striker. Is set. Between the pole and the driving plate, a spring is applied to urge the pole in the rotation direction of the lock and urge the driving plate in the rotation direction opposite to the rotation direction of backlash.

  According to the second aspect of the present invention, the spring for urging the pole in the rotation direction of the lock and the spring for urging the driving plate in the rotation direction opposite to the rotation direction of the backlash include the pole and the driving plate. The number of springs set can be rationalized and reduced by the springs between the two.

  Next, according to a third aspect of the present invention, in the second aspect described above, the spring has a radial distance from the first support shaft at one end hooked to the pole, and is hooked to the driving plate. It is set longer than the radial distance from the second support shaft at the other end.

  According to the third aspect of the present invention, the spring is hung between the pole and the driving plate so that a larger urging force is applied to the pole than the driving plate as described above. It can be pushed in the direction of driving.

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 drive-in state figure of a locking device. It is the VV sectional view taken on the line of FIG. It is a releasing state figure 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 on the vehicle seat 1 and can be engaged with and locked to the striker S installed on the floor F. It has a structure. Here, the vehicle seat 1 includes a seat back 2 serving as a backrest and a seat cushion 3 serving as a seating portion, and both side portions on the front end side of the seat cushion 3 are fixed on the floor F. The hinge is rotatably connected to the installed support base 4.

  And the locking device 5 mentioned above is provided in both the side parts of the rear end side of the seat cushion 3, and the seat cushion 3 is always floored by engaging and locking these locking devices 5 to the striker S. It is locked and held in a posture lying on F. The engagement lock state of the lock device 5 with respect to the striker S is released by operating a release lever (not shown) provided on the vehicle seat 1.

  By operating the release lever (not shown) described above, the vehicle seat 1 can be switched to a folded posture state in which the seat back 2 is folded forward and folded on the upper surface portion of the seat cushion 3. Yes. Therefore, the vehicle seat 1 is switched to the above-described folded posture state by operating the release lever described above, and the engagement lock state of the lock device 5 with respect to the striker S is released, It is switched to a state in which it can be flipped forward and rotated about the connecting point 4A.

  Thereby, the vehicle seat 1 is held in a posture state in which the vehicle seat 1 is flipped up to the front side and stored by an urging force of an urging spring (not shown) provided at a connecting portion with the support base 4. The retracted posture state of the vehicle seat 1 is such that the vehicle seat 1 is brought down on the floor F, and each locking device 5 is pushed into each striker S on the floor F to be engaged and locked. It is designed to be held back in a lying posture.

  Specifically, each lock device 5 described above is configured to operate so as to be pushed by each striker S and engaged and locked with each striker S by being pushed into each striker S. Hereinafter, the configuration of each locking device 5 described above will be described in detail with reference to FIGS. In addition, in each figure, in order to show the structure of the locking device 5 in an easy-to-understand manner, a lid plate that is integrally assembled to the base plate 10 described later is omitted.

  As shown in FIGS. 1 and 2, the lock device 5 described above is rotatable with a plate-like base plate 10 integrally fixed to the skeleton frame of the seat cushion 3 and a second support shaft 21 on the base plate 10. The hook 20 and the driving plate 40 that are pivotally supported, the pole 30 that is pivotally supported on the base plate 10 by the first supporting shaft 31, and the pole 30 and the thrusting plate 40 that are hung between them are mutually contradictory. And a torsion spring 27 that urges the hook 20 to rotate relative to the base plate 10.

  First, the schematic configuration of each component described above will be briefly described. As shown in FIG. 6, the hook 20 is in an initial rotational posture state in which the upper jaw portion 22 protrudes into the concave portion 11 of the base plate 10 by the urging force of the torsion spring 27 that is normally hooked between the hook 20 and the base plate 10. Is held in. The hook 20 rotates when the striker S enters the recess 11 of the base plate 10 and the upper jaw portion 22 is pressed by the striker S. As a result, as shown in FIG. 3, the lower jaw portion 23 of the hook 20 is turned to the back side of the striker S, and the striker S is placed in the receiving port 24 between the upper jaw portion 22 and the lower jaw portion 23. In this state, the rotation is stopped by the pole 30 and held.

  On the other hand, as shown in FIG. 6, the pole 30 is normally held in a state in which the corner portion 32 is pressed against the outer peripheral surface of the corner portion 26 of the hook 20 by the biasing force of the tension spring 50. As shown in FIG. 3, the pole 30 rotates to the position where the hook 20 holds the striker S as described above, and the corner portion 26 of the hook 20 is released from the engagement with the corner portion 32. Rotation is caused by the bias, and the corner portion 26 of the hook 20 is put on the outer peripheral surface (engagement surface 32A) of the corner portion 32. Thereby, the rotational movement in the return direction in which the hook 20 is energized is restricted, and the striker S is engaged with the hook 20 and locked.

  Further, as shown in FIG. 6, the push-in plate 40 has a pin 25 projecting from the hook 20 inserted into the engagement hole 41 so that it can rotate in conjunction with the hook 20. It is configured. Due to the biasing force of the tension spring 50 that is hooked between the driving plate 40 and the pole 30 described above, the inner peripheral surface of the engaging hole 41 is normally attached to the pin 25 of the hook 20 in the counterclockwise direction shown in the drawing. It is held in a pressed state.

  As shown in FIG. 3, the above-described driving plate 40 rotates when the hook 20 is pushed by the striker S and rotates so that the pole 30 engages the corner portion 26 of the hook 20 with the corner portion 26 (clockwise direction shown in the drawing). ), The corner portion 42 is pressed by the corner portion 32 of the pole 30 and rotates. As a result, the drive-in plate 40 presses the striker S from the back side by the legs 43 to drive the striker S further into the inward side of the recess 11 and press the striker S against the upper jaw 22 of the hook 20. Hold in state. Accordingly, the striker S is pressed between the upper jaw portion 22 of the hook 20 and the leg portion 43 of the driving plate 40, and is held so as not to rattle between them.

  Hereinafter, each configuration of the locking device 5 will be described in detail in order. First, the configuration of the base plate 10 will be described. As shown in FIG. 2, the base plate 10 is integrally connected to the skeleton frame of the seat cushion 3 (see FIG. 1), and each of the hook 20, the pole 30, the driving plate 40, etc. is provided on the plate. Actuating parts can be assembled. The base plate 10 is formed with a recess 11 that can receive the striker S. As shown in FIG. 6, the recess 11 is a recess having a cylindrical shape in which the lateral width for receiving the striker S is larger than the cross-sectional diameter of the striker S, and the lateral width is constant and extends inward. It is formed in a shape, and the striker S can be received up to a position where it abuts against the flat upper surface 11A.

  Next, returning to FIG. 2, the configuration of the hook 20 will be described. The hook 20 is provided on the plate of the base plate 10 so as to be rotatably connected by a second support shaft 21. The hook 20 is formed with a pin 25 projecting in the axial direction from the top of the plate, and the pin 25 is inserted into a circular engagement hole 41 formed in the driving plate 40, so that the hook 20 is configured to rotate integrally with the driving plate 40.

  As shown in FIG. 6, the above-described hook 20 is normally urged to rotate counterclockwise by the urging force of the torsion spring 27 hooked between the hook 20 and the base plate 10. Here, one end 27 </ b> A of the torsion spring 27 is hooked on the upper jaw 22 of the hook 20, and the other end 27 </ b> B is hooked integrally with the base plate 10. Thus, before the striker S enters the concave portion 11 of the base plate 10, the hook 20 is held at the initial rotational posture position where the corner portion 26 formed to protrude from the outer peripheral portion contacts the stopper surface 32 </ b> C of the pole 30. It is said that it was in the state.

  In this initial rotational posture position, the hook 20 is held in a posture state in which the upper jaw portion 22 formed to extend from the outer periphery of the hook 20 into an arm shape is projected into the recess 11 of the base plate 10. ing. As a result, when the striker S enters the recess 11 of the base plate 10 from the above state, the upper jaw portion 22 is pressed by the striker S and the hook 20 resists the biasing force of the torsion spring 27. It is pushed in the clockwise direction as shown (see FIG. 3).

  Then, by this rotation, the hook 20 turns the lower jaw portion 23 formed on the outer periphery of the hook 20 to the back side of the striker S, and the striker S is received between the lower jaw portion 23 and the upper jaw portion 22. 24 will be accepted. Then, with the rotation described above, the hook 20 is brought into a state in which the corner portion 26 is abutted in the rotation direction by the corner portion 32 of the pole 30 that is rotated out of engagement with the hook 20. The rotation in the return direction due to the urging of the torsion spring 27 is restricted.

  As a result, the striker S is sandwiched between the upper jaw portion 22 and the lower jaw portion 23 of the hook 20 in the recess 11 of the base plate 10, and is locked so as not to come out of the recess 11. Held. The striker S is locked by the hook 20 from a state in which the pole 30 is rotated counterclockwise by pulling the cable Ca and the corner 32 of the pole 30 hits the corner 26 of the hook 20. It is canceled by removing it. Specifically, when the corner portion 32 of the pole 30 is removed from the state where it abuts against the corner portion 26 of the hook 20 by the pulling operation of the cable Ca, the hook 20 is rotated counterclockwise in the figure by the urging force of the torsion spring 27. The upper jaw 22 rotates and the striker S is pushed out of the recess 11 and is disengaged from the striker S (see FIG. 6).

  Here, the cable Ca described above has a double structure in which a wire-like inner cable is inserted into an outer cable serving as a guide tube, and one end of the outer cable is hooked on a hanging portion 12 formed on the base plate. It is attached and fixed, and one end of the inner cable is hooked and fixed to the hook portion 33 of the pole 30. The cable Ca is connected to a release lever (not shown) on the other end side of the cable Ca. When the release lever is operated, the inner cable is pulled and the pole 30 is rotated counterclockwise in the drawing. It has become so.

  Next, returning to FIG. 2, the configuration of the pole 30 will be described. The pole 30 is provided on the base plate 10 so as to be rotatably connected by a first support shaft 31. As shown in FIG. 6, the pole 30 is normally in a state of being urged to rotate in the clockwise direction in the drawing by the urging force of the tension spring 50 hooked between the pole 30 and the driving plate 40. As a result, the pole 30 is in an initial state in which the corner portion 32 protruding from the outer periphery of the striker S comes into contact with the outer peripheral surface of the corner portion 26 of the hook 20 before the striker S enters the recess 11 of the base plate 10. It is in a state of being held at the rotational posture position.

  Here, as shown in FIGS. 2 and 5, the pole 30 described above has a plate thickness equal to or greater than the plate thickness obtained by adding the plate thickness in the axial direction of the hook 20 and the plate thickness in the axial direction of the driving plate 40. The hook 20 and the driving plate 40 are arranged so as to face each other in the radial direction. The corner 32 formed on the pole 30 has an outer peripheral surface that is pressed against the engagement surface 26A of the corner 26 of the hook 20 as the tension spring 50 of the pole 30 rotates. The surface 32 </ b> A and the driving surface 32 </ b> B applied to the pressed surface 42 </ b> A of the corner 42 of the driving plate 40 are formed by being divided into two in the axial direction. Here, the drive-in surface 32B and the pressed surface 42A correspond to the contact surfaces of the present invention.

  And the corner | angular part 32 mentioned above has the shape in which the arm part which the outer peripheral surface becomes the engaging surface 32A has the space part which can accept the corner | angular part 26 of the hook 20 in the step lower part of the arm. The outer peripheral surface of the lower step portion of the arm that forms this space is formed as a stopper surface 32C that can be brought into contact with the corner portion 26 of the hook 20 and locked (see FIG. 6). .

  In the pole 30 described above, when the striker S enters the recess 11 and the hook 20 is pushed and the corner portion 26 of the hook 20 is removed from the corner portion 32, the urging force of the tension spring 50 causes the illustrated timepiece to watch. Rotating in the turning direction, the corner 32 is dropped below the step of the corner 26 of the hook 20. As a result, as shown in FIG. 3, even if the movement of the striker S entering the recess 11 is finished and the hook 20 is about to return and rotate by the urging force of the torsion spring 27 as shown in FIG. The corner portion 26 is supported and held in a state in which the return rotation of the hook 20 is restricted.

  Here, the corner portion 32 of the pole 30 described above is an arc drawn around the center of the first support shaft 31 where the engaging surface 32A abutted against the corner portion 26 of the hook 20 is the rotation center of the pole 30. It is formed in a shape curved in the shape of In addition, the engagement surface 26A of the corner portion 26 of the hook 20 applied to the engagement surface 32A is also when the corner portion 32 of the pole 30 is dropped under the step of the corner portion 26 when the hook 20 rotates ( 3) is formed in a curved shape in the shape of an arc drawn around the center of the first support shaft 31 that is the center of rotation of the pole 30.

  That is, both the engagement surface 32A of the corner portion 32 of the pole 30 and the engagement surface 26A of the corner portion 26 of the hook 20 are formed in a curved shape in the shape of an arc drawn around the center of the first support shaft 31, respectively. Has been. Thereby, even if the corner portion 32 of the pole 30 changes the angle with respect to the corner portion 26 of the hook 20, the engagement surface 32 </ b> A of the corner portion 32 of the pole 30 is always changed to the engagement surface of the corner portion 26 of the hook 20. It can be maintained in a state of being in surface contact with 26A. In addition, due to the relationship between the engagement surfaces 32A and 26A described above, when the corner portion 32 of the pole 30 falls under the step of the corner portion 26 of the hook 20, the corner portion 32 of the pole 30 advances the angle of the depression. However, no matter how much it is rotated, the corner portion 26 of the hook 20 is not pushed in such a manner as to push it in the clockwise direction in the figure.

  Therefore, when the corner portion 26 of the hook 20 is removed from the corner portion 32 of the pole 30 by the rotation of the hook 20, the corner portion 32 of the pole 30 is smoothly dropped under the step of the corner portion 26 of the hook 20. The engagement surface 32A is held in a state where the engagement surface 32A is in surface contact with the engagement surface 26A of the corner portion 26 of the hook 20. Here, as shown in FIG. 3, the pole 30 of the driving plate 40 is moved by the driving surface 32 </ b> B with the rotation of the corner 32 of the pole 30 being dropped below the step of the corner 26 of the hook 20 as described above. The corner portion 42 is pressed, and the driving plate 40 is rotated so as to be driven in the clockwise direction as the rotation proceeds, and the striker S is pressed against the upper jaw portion 22 of the hook 20 by the driving plate 40. .

  Next, returning to FIG. 2, the configuration of the driving plate 40 will be described. The drive-in plate 40 is rotatably connected to the base plate 10 by the second support shaft 21 together with the hook 20 described above. Specifically, the drive-in plate 40 is in a state in which a pin 25 formed to protrude from the hook 20 is inserted into a circular engagement hole 41 formed through the plate portion. The engagement hole 41 is formed in a regular circle having a diameter larger than the diameter of the pin 25.

  Thus, within the range in which the pin 25 moves in the engagement hole 41, the hook 20 and the driving plate 40 do not interlock with each other, but the pin 25 comes into contact with the inner peripheral surface of the engagement hole 41, thereby 20 and the driving plate 40 are integrally rotated with each other. A tension spring 50 is hooked between the above-described driving plate 40 and the pole 30 described above. As shown in FIG. 6, the thrust plate 40 is normally rotated counterclockwise by the urging force of the tension spring 50. As a result, the inner peripheral surface of the engagement hole 41 comes into contact with the pin 25 of the hook 20 in a state where the rotation is stopped, and is held in a state where the rotation is stopped with respect to the hook 20.

  As shown in FIG. 3, the driving plate 40 rotates when the hook 20 is pressed by the striker S and rotates so that the pole 30 engages with the corner portion 26 of the hook 20. The surface (the pressed surface 42A) is pressed by the follow-up surface 32B of the corner portion 32 of the pole 30 and is rotated in the clockwise direction in the drawing. As a result, as shown in FIG. 4, the push-in plate 40 pushes the striker S further inwardly of the concave portion 11 by the push-in surface 43 </ b> A of the leg 43 curved in the rotation direction, and the upper jaw portion 22 of the hook 20. Is held in a pressed state. When the hook 20 is pushed around by the striker S and the upper jaw portion 22 reaches the upper surface 11A of the concave portion 11 of the base plate 10, the driving plate 40 causes the striker S to be inserted into the concave portion 11 by the driving surface 43A. It presses against the upper surface 11A.

  Here, the pressed surface 42A of the driving plate 40 described above gradually moves in the clockwise direction with the progress of the clockwise rotation of the pole 30 with respect to the driving surface 32B of the corner portion 32 of the pole 30. It is formed in a shape having a driving angle. Specifically, the above-described pressed surface 42A is not curved in the same circular arc shape as the driving surface 32B of the pole 30, and the driving plate 32B is moved by the movement of the driving surface 32B of the pole 30 entering. It is made into the shape which receives pressing force in the direction which rotates 40 in the clockwise direction shown in the figure.

  By the way, as shown in FIG. 4, the tension spring 50 hooked between the pole 30 and the driving plate 40 has a radius from the first support shaft 31 at one end 51 hooked to the pole 30. The separation distance L1 in the direction is set to be longer than the separation dimension L2 in the radial direction from the second support shaft 21 of the other end 52 hooked to the driving plate 40. Thereby, the torque that the pole 30 is rotated in the clockwise direction shown in the drawing is larger than the torque in which the driving plate 40 is rotated in the counterclockwise direction in the drawing due to the urging force of the tension spring 50. The driving plate 40 can be surely pushed in the driving direction by the pole 30.

  With the configuration described above, the striker S can be engaged with the lock device 5 and the striker plate 40 can be driven and held so as not to rattle. The state in which the striker S is engaged with the lock device 5 can be released by pulling the cable Ca connected to the pole 30 by operating a release lever (not shown) as described above. That is, by pulling the cable Ca, the pole 30 is rotated in the counterclockwise direction as shown in FIG. 6, and the corner portion 32 of the pole 30 becomes the corner portion 26 of the hook 20 and the corner portion 42 of the driving plate 40. The hook 20 and the drive-in plate 40 are rotated counterclockwise by the torsion spring 27 and the urging force of the tension spring 50, respectively, and the striker S is moved to the upper jaw portion 22 of the hook 20. Is pushed out of the state engaged with the hook 20.

  Thus, according to the locking device 5 of the present embodiment, when the striker S enters the recess 11 of the base plate 10, the hook 20 is pushed around and the hook 20 sandwiches the striker S with the recess 11. It will be in the state. Then, the rotation of the hook 20 causes the pole 30 to rotate by urging, and the hook 30 engages with the hook 20 to enter a locked state in which the return rotation of the hook 20 is restricted. Then, the pole 30 pushes the driving plate 40 in the backlash direction by the urging rotation that engages with the hook 20 so that the striker S is driven further back and does not rattle with the recess 11. Hold in a depressed state.

  The locked state of the hook 20 by the pole 30 and the driven state of the driving plate 40 can be released by rotating the pole 30 in a direction against the bias. As described above, the unlocking operation of the lock device 5 having the function of preventing the striker S from being loosened can be performed only by the rotation operation of the pole 30 alone, and the operation stroke for the release can be shortened. Further, the engaging surfaces 32A and 26A of the pole 30 and the hook 20 which are locked by being engaged with each other are formed in an arc shape around the first support shaft 31 which is the rotation center of the pole 30. Even if the rotation angle of the pole 30 is changed, the surfaces are kept in contact with each other, thereby eliminating the gap between the two engaging surfaces 32A and 26A, and the two engaging surfaces 32A and 26A. With this contact structure, a large load applied in the direction in which the striker S is removed from the recess 11 can be received with a stable force.

  That is, with reference to FIGS. 3 to 4, when the striker S receives a large load in the direction in which it is removed from the recess 11 (the downward direction in the figure), the hook 20 is likely to be rotated in the counterclockwise direction in the figure with a strong force. To do. However, this force is supported by a structure in which the engaging surface 32A of the pole 30 and the engaging surface 26A of the hook 20 are in surface contact with each other and formed in a circular arc shape with the first support shaft 31 as the center. Thus, the corner portion 32 of the pole 30 receives the force in the direction in which the corner portion 32 is disengaged from the engagement with the corner portion 26 of the hook 20 (counterclockwise direction in the drawing), and the above force is stably received. be able to.

  Further, a spring that urges the pole 30 in the rotation direction of the lock (clockwise direction in the figure) and a spring that urges the driving plate 40 in the rotation direction (the counterclockwise direction in the figure) opposite to the rotation direction of the backlash. However, since it is constituted by one tension spring 50 hung between the pole 30 and the driving plate 40, the set number of springs can be rationalized and reduced. In addition, since the driving plate 40 and the hook 20 are supported coaxially by the first support shaft 31, the number of rotation shafts set can be rationalized and reduced.

  As mentioned above, although the embodiment of the present invention has been described using one example, the present invention can be implemented in various forms in addition to the above example. For example, the locking device of the present invention can be applied to applications other than the use for 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.

  In the above embodiment, the hook 25 is provided with the pin 25 projecting and the driving plate 40 is formed with the engaging hole 41 for receiving the pin 25. However, the hook has an engaging hole formed therein. Alternatively, the reverse configuration in which the pins protrude from the driving plate may be employed. Moreover, the connection structure is not particularly limited as long as the hook and the driving plate can be connected to each other so as to be interlocked with each other without being limited to the combination of the pin and the hole described above.

  In the above embodiment, the stopper structure for holding the hook 20 in the initial rotation posture position is exemplified by the structure in which the corner portion 26 of the hook 20 is brought into contact with the stopper surface 32C of the pole 30 to stop the rotation. It may be configured to be provided with a stopper piece that stops the rotation by abutting the hook. Further, although the configuration in which the hook 20 is rotationally biased with respect to the base plate 10 by the torsion spring 27 is illustrated, the hook is rotationally biased with respect to the base plate by a spring hung between the pole and the driving plate. Also good. That is, using the fact that the hook is interlocked with the driving plate, the hook is rotated and biased by a spring hung between the pole and the driving plate. However, in this case, the spring hung between the pole and the driving plate needs to have a strong spring force.

  Further, the configuration in which the tension spring 50 is hooked between the pole 30 and the driving plate 40 is illustrated. However, the configuration is not limited to the tension spring, and a compression spring, a winding spring, or the like that is hooked on the pole and the driving plate individually. Various springs can be applied. Further, it is possible to urge the rotation by applying a tension spring between the hook and the base plate but not the driving plate.

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 Upper surface 12 Hanging part 20 Hook 21 Second spindle 22 Upper jaw part 23 Lower jaw part 24 Entrance 25 Pin 26 Corner part 26A engagement surface 27 torsion spring 27A one end 27B other end 30 pole 31 first support shaft 32 corner 32A engagement surface 32B driving surface (contact surface)
32C Stopper surface 33 Hanging portion 40 Drive-in plate 41 Engagement hole 42 Corner portion 42A Pressed surface (contact surface)
43 Leg 43A Driving surface 50 Tension spring (spring)
51 One end 52 Other end Ca cable F Floor S Striker L1, L2 Radial spacing

Claims (3)

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 driving plate rotatably supported on the base plate by a second support shaft;
A hook that is rotatably supported on the base plate by the second support shaft together with the driving plate, and that can be interlocked with the movement of the driving plate;
The hook is rotated by the movement of the striker entering the recess of the base plate, and the striker is held between the hook and the pole, and the pole is rotated to a position where the hook holds the striker. Rotating to a position where the hook engages with the hook by urging and restricting the return rotation of the hook is brought into a locked state, and the driving plate is pushed by the force of the pole rotating in the locking direction by the urging to rotate the striker. The first support shaft, which is the center of rotation of the pole, has the engaging surface of the pole and the hook engaged with each other to be locked. Even if the rotation angle of the pole changes, the contact state of each other is a surface contact state. The abutment surface of both of the poles that pushes and pushes the driving plate in the backlashing direction is loosened by the driving plate as the rotation of the pole proceeds in the locking direction. A locking device characterized by having a surface shape having a driving angle driven in a direction. The locking device according to claim 1,
Both the rotation direction of backlashing of the driving plate and the rotation direction of the lock of the pole are set to the same rotation direction as the direction in which the hook is pushed by the striker, and between the pole and the driving plate. A locking device characterized in that a spring is applied to urge the pole in the rotation direction of the lock and urge the drive plate in a rotation direction opposite to the rotation direction of the backlash. The locking device according to claim 2,
The spring has a radial distance from the first support shaft at one end hooked to the pole, and a radial distance from the second support shaft at the other end hooked to the driving plate. A locking device characterized in that it is set longer than the separation dimension.

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