Strike lock

Abstract

To provide a latch lock with a child-lock function which can prevent a child lock from interfering with unlocking when forcibly unlocking from the outside with a simple structure.SOLUTION: It is configured as such that between a rotary shaft 70 for interlocking a lever 10 on the indoor side and a display on the outdoor side, and a slider 80 that can be engaged with the rotary shaft 70 for a child lock, at a door locking position of the lever 10 and a locking position of the slider 80, engagement between the rotary shaft 70 and the slider 80 is released when the rotary shaft is pushed in from the outside during emergency unlocking, a clutch is formed with which rotation of the rotary shaft 70 is allowed. When forcibly unlocking from the outdoor side, physical contact between the rotary shaft 70 and the slider 80 is released, and unlocking is performed smoothly.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a mortise lock that is attached to a wall panel that separates the interior and exterior of a room or to a door that opens and closes an entrance to a wall panel, and that locks and unlocks the door by swinging a lever. In particular, the present invention relates to a mortise lock with a child lock, which does not interfere with emergency unlocking from the exterior side of the room. [Background technology]

[0002] The entrance to a wall panel that separates the inside and outside of a toilet cubicle or the like is fitted with a door that can be opened and closed. A strike lock is known as a lock that locks and unlocks such doors by swinging a lever from inside the room. This mortise lock can be attached to either a wall panel or a door, but the following description will focus on an example where it is attached to a door.

[0003] The lever is supported on the interior side surface of the door so as to be rotatable about its inner end along the interior side surface of the door. The lever is swung and lowered until it is approximately parallel to the floor, and its outer end is engaged with a receiver provided on the interior side of the wall panel. Then, the lever is bridged between the interior side surface of the door and the interior side surface of the wall panel, the door is locked, and the entrance and exit of the wall panel is closed. Conversely, when the lever is raised until it is nearly perpendicular to the floor, its outer end is retracted from the interior side of the wall panel to the interior side of the door, unlocking the door and allowing the entrance and exit of the wall panel to be opened and closed.

[0004] On the other hand, a generally disk-shaped indicator is supported on the exterior side of the door so as to be rotatable along the exterior side of the door. On the surface of the indicator, a lock sign (for example, a fan-shaped red colored portion) indicating that the door is locked and an unlock sign (for example, a fan-shaped blue colored portion) indicating that the door is unlocked are arranged side by side in the rotational direction. This indicator is covered with a cover, and a sector-shaped indicator window is opened in the upper half of the cover, and the lock mark and unlock mark of the indicator can be seen through this indicator window.

[0005] Furthermore, a rotating shaft that passes through the door is disposed between the lever and the indicator, with the inside end of this rotating shaft fixed to the swing center of the lever and the outside end fixed to the circular center of the indicator. Therefore, when the lever is swung from inside the vehicle, the display body rotates together with the lever via the rotating shaft, causing the display window to alternate between a locked and unlocked sign, making it possible to tell from outside the vehicle whether the door is locked or unlocked.

[0006] Incidentally, in the event of an emergency, such as someone collapsing inside the room, it is necessary to forcibly unlock the strike lock from outside the room. For this reason, an emergency unlocking section is provided at the center of the circle of the display body, and by engaging an emergency unlocking key here and rotating the rotating shaft, the lever rises up from the floor surface and the door is unlocked.

[0007] On the other hand, even if a person with a child enters a toilet stall equipped with such a strike lock and locks the door from the inside, the child may swing the lever and unlock the door while the adult is not looking. If this happens, someone outside may see the unlocked sign in the indicator window and mistakenly think that the stall is vacant, causing awkwardness or causing a dispute.

[0008] In order to prevent such situations where children unlock the door from inside the room, attempts have been made to add a child lock function to the strike lock, as in Patent Documents 1 and 2, which prevents the lever from being swung when the door is locked. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2019-190139 A [Patent Document 2] JP 2020-147945 A Summary of the Invention [Problem to be solved by the invention]

[0010] However, if a child lock function is added to a strike lock, when it is necessary to forcibly unlock the strike lock from outside the room in an emergency, the child lock function may get in the way and prevent the forced unlocking from being carried out smoothly.

[0011] For example, in the case of the strike lock in Patent Document 1, the child lock function is achieved by providing a regulating body that can move forward and backward on the swinging trajectory of the lever, and when the regulating body moves forward it comes into contact with the lever, providing rotational resistance to the rotating shaft and preventing the lever from being swung.

[0012] For this reason, if you try to force-unlock the door from the outside, the rotational resistance of the restrictor is large, making it difficult to turn the lever smoothly. In addition, the emergency unlocking key or emergency unlocking part may bend or break if it cannot withstand the rotational resistance. Furthermore, in the case of the strike lock in Patent Document 1, the regulating body is positioned opposite the tip of the lever when in the locked state, which means that the installation space for the lock is large, making it difficult to replace an existing strike lock, to install in places where the wall panel is narrow, or to apply to sliding doors that have a strike embedded in the frame.

[0013] On the other hand, in the case of the strike lock of Patent Document 2, the child lock function is provided by providing a locking receiving part on the outer periphery of the inner end of the lever and a stop body that can move forward and backward relative to the lever on the interior seat, and when the pusher is pressed, the stop body moves forward and its tip engages with the locking receiving part. Dero When the release piece is pressed, the stop body retracts and its tip disengages from the locking receiving part, releasing the child lock.

[0014] For this reason, if you try to forcefully unlock the door from the outside while it is locked, you need to overcome the engagement force between the stop body and the locking part, and rotate the lever with enough force to pull the stop body out of the locking part, making it difficult to turn the lever smoothly. In addition, there is a risk that the emergency unlocking key or the emergency unlocking part will bend or break if it cannot withstand the rotation resistance. In addition, because there is physical contact between the stop body and the locking receiving portion, if excessive load is repeatedly applied to forcibly unlock the door, the tip of the stop body will wear down, losing the engagement with the locking receiving portion and causing the child lock to no longer function. Furthermore, in the case of the strike lock in Patent Document 2, a pusher is pressed to lock the child, and a release piece that is separate from the pusher is pressed to unlock the door, making the operation complicated, with many parts required, high costs, and a tendency for the lock to break down.

[0015] Therefore, an object of the present invention is to provide a strike lock with a child lock function that has a simple structure and prevents the child lock from interfering with unlocking when forced unlocking is attempted from the outside of the vehicle. [Means for solving the problem]

[0016] In order to solve the above-mentioned problems, the striker lock of the present invention is attached to a wall panel that separates indoors from outdoors, or to a door that opens and closes an entrance to the wall panel, and locks and unlocks the door by operation from inside the room, and comprises a lever rotatably supported along the indoor side surface of either the door or the wall panel, a rotating shaft that penetrates the side of either the door or the wall panel on which the lever is supported and rotates forward and backward in conjunction with the swinging operation of the lever, and a locking mechanism that is supported approximately parallel to the indoor side surface of either the door or the wall panel on which the lever is supported, and is slidable between a locked position where it engages with the rotating shaft to prevent its rotation, and an unlocked position where it allows the rotation of the rotating shaft. Nasuand a slider, wherein in an emergency, the rotating shaft can be rotated from outside the vehicle using an emergency unlocking key to swing the lever from the door locked position to the door unlocked position, and at least a part of the rotating shaft can be shifted axially between an original position away from the lever and a pushed-in position approaching the lever and is biased toward the original position, and a clutch is formed between the rotating shaft and the slider such that when the lever is in the door locking position and the slider is in the locking position, the engagement between the rotating shaft and the slider is released when the rotating shaft is in the pushed-in position, allowing the rotating shaft to rotate.

[0017] The strike lock according to the present invention is constructed as described above, and its lever and rotating shaft And Since a clutch is formed between the slider and the lever, even when the child lock is engaged, when the rotating shaft is in the pushed-in position by using an emergency unlocking key from outside the vehicle to push it in, the connection between the lever and the rotating shaft and the slider is cut off, and the rotating shaft can be rotated to perform emergency unlocking. During emergency unlocking, the clutch acts to cut off the connection between the lever and rotating shaft and the slider, allowing the lever to be smoothly swung from outside the room without receiving resistance from the slider. When the door is forcibly unlocked from the outside of the room, the lever and the rotary shaft are not in physical contact with the slider, so no load is applied to the slider, and the slider is prevented from becoming unlocked or from breaking down due to wear or the like. In addition, the forced unlocking operation is easy as it only requires pushing in and turning the rotating shaft from outside the room, and since it has a simple structure that only requires a clutch, there is no significant increase in the number of parts or costs, and it does not cause any malfunctions. Furthermore, because the lever and slider are close to each other, the installation space is almost the same as that of a typical strike lock, making it easy to replace an existing strike lock, install in places where the wall panel is narrow, and apply to sliding doors that have a strike embedded in the frame.

[0018] In the strike lock of the invention, it is preferable that the rotating shaft has an engaging portion protruding radially from its outer periphery, the slider has an engaged portion capable of engaging with the engaging portion of the rotating shaft, and the clutch is configured such that, when the lever is in the locking position and the slider is in the locking position, the engaging portion engages with the engaged portion when the rotating shaft is in the original position, and when the rotating shaft is in the pushed-in position, the engaging portion shifts axially relative to the engaged portion to release the engagement and allow rotation.

[0019] With this configuration, the clutch function can be achieved with a very simple structure and at relatively low cost.

[0020] In the strike lock of the invention, the slider can have a first abutment portion that can abut against the engagement portion when the lever is near the unlocked position and the slider is in the locked position, and a configuration can be adopted in which the engagement portion presses the first abutment portion as the pivot shaft rotates in the locking direction, thereby pushing the slider back from the locked position to the unlocked position.

[0021] With this configuration, even if an emergency unlocking operation is performed from outside the room and an abnormal state occurs in which the lever is in the unlocked position but only the slider is in the locked position, or if the lever is in the unlocked position and the slider is slid to the locked position due to tampering or other reasons, the next time the toilet is used, the lever is swung to the locked position from inside the room and the slider automatically returns to the unlocked position in conjunction with this (if child locking is desired, the slider is slid to the locked position again). This prevents any problems from occurring when using the room afterwards.

[0022] In the strike lock of the invention, the rotating shaft has a kick-out portion that protrudes radially from a position that is circumferentially out of phase with the engagement portion, and the slider has a second abutment portion with which the kick-out portion can abut when the rotating shaft is in the pushed-in position, and a configuration can be adopted in which, when the rotating shaft is in the pushed-in position, the kick-out portion presses the second abutment portion as the rotating shaft rotates in the unlocking direction, thereby kicking the slider out from the locked position to the unlocked position.

[0023] With this configuration, when an emergency unlocking operation is performed from outside the room, the slider also automatically returns to the unlocked position due to the action of the kick-out part, so after emergency unlocking, the abnormal state where only the slider is in the locked position while the lever is in the unlocked position is eliminated. Therefore, it is possible to prevent problems from occurring with normal indoor use from the next time onwards.

[0024] In the strike lock of the invention, a tapered surface inclined in the circumferential direction of the rotating shaft is formed on at least one of the radial outer edge of the engaging portion or the radial outer edge of the engaged portion, and when a predetermined torque is applied to the rotating shaft by operating the lever, the rotating shaft shifts axially against the bias so that the engaging portion disengages from the engaged portion, thereby releasing the engagement.

[0025] With this configuration, if you forget that you have set the child lock and try to forcefully swing the lever in the unlocking direction from inside the vehicle, the child lock will be automatically released by the action of the tapered surface. This allows the lever to be swung, preventing damage to the lever, slider, etc. Effect of the Invention

[0026] Regarding the invention Hit Since the lock is configured as described above, it is possible to prevent the child lock from interfering with the forced unlocking from the outside of the room with a simple structure. [Brief description of the drawings]

[0027] [Figure 1] (a) is a side view of the embodiment of the striker lock, and (b) is a front view. [Diagram 2] FIG. 2A is a cross-sectional view of the embodiment of the striker lock, and FIG. 2B is an exploded perspective view. [Diagram 3] FIG. 1 is a schematic diagram of a striking lock according to an embodiment, in which (a) is unlocked and (b) is child-locked. [Figure 4] FIG. 1 is a schematic diagram showing an emergency unlocking operation of the strike lock of the embodiment; [Diagram 5] FIG. 13 is a schematic diagram showing an operation of returning the slider to a normal position in the striking lock of the embodiment. [Figure 6] FIG. 13 is a schematic diagram showing an emergency unlocking operation in the first modified example of the strike lock of the embodiment; [Figure 7] FIG. 13 is a schematic diagram showing an unlocking operation of the lever while the latch is locked in the second modified example of the embodiment; [Figure 8] FIG. 3 is a perspective view of a third modified example of the striker of the embodiment; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 and 2, the striker lock 1 of the embodiment is attached to a wall panel P that separates the interior and exterior of a private room such as a toilet, or to a door D that opens and closes the entrance to the wall panel P, and is capable of locking and unlocking the door D by swinging a lever 10 arranged on the interior side. In the present invention, the term "door" refers to any structure that can be opened and closed to separate the interior and exterior, such as a hinged door, folding door, or sliding door.

[0029] In addition, in conjunction with the swinging of this lever 10, the display body 20 located on the outside of the vehicle rotates, and either the lock sign or the unlock sign arranged in parallel around the periphery of the display body 20 is displayed on the outside of the vehicle through a display window 31 opening in a cover 30 covering the display body, making it possible to distinguish the locked or unlocked state of the door D from the outside of the vehicle. Below, an example of attaching the strike lock 1 to a door D will be described, but the same effect will naturally be achieved when the strike lock 1 is attached to a wall panel P.

[0030] As shown in Figs. 1 and 2, an interior seat 50 is fixed to the interior side surface of the door D via a spacer 40, and the lever 10 is supported by the interior seat 50 so as to be swingable along the interior side surface. An exterior base 60 is fixed to the exterior side surface of the door D, and the display body 20 is rotatably supported by this exterior base 60. The cover 30 that covers the display body 20 is attached to the front of the outdoor seat 60, and a part of the display body 20 faces the display window 31 that opens in the upper half of the cover 30.

[0031] The indoor seat 50 and the outdoor seat 60 are fixed to the door D by screwing a bolt 61 that passes through the outdoor seat 60 into a threaded tube 51 formed on the indoor seat 50, thereby connecting the seats 50, 60 to each other with the spacer 40 and the door D in between.

[0032] 1 and 2, the spacer 40 is cylindrical and has an opening 41 at its center. Holes are provided on both sides of the opening 41, and the screw tube 51 of the indoor base 50 is inserted into these holes.

[0033] On the other hand, as shown in FIG. 1 and FIG. 2, the lever 10 has a rotating seat 11 fixed to its inner end, which is the end on the side that is attached to the indoor seat 50. A mounting shaft 12 protrudes from the inner surface of the rotating seat 11, and a square hole 13 is formed in the end face of the mounting shaft 12. Further, at the outer end of the lever 10, that is, the end opposite to the end to which the rotating base 11 is fixed, a slide 14 is fixed to the surface facing the door D or the wall panel P.

[0034] As shown in Figure 2, the mounting shaft 12 of this rotating seat 11 is inserted into and journalled in a bearing hole 52 of the indoor seat 50, so that the lever 10 is supported rotatably along the indoor side surface of the door D, centered on the indoor seat 50.

[0035] On the other hand, as shown in FIG. 1, a receiving device 2 is fixed to the indoor side surface of the wall panel P at a position slightly lower than the indoor base 50. When the lever 10 is swung and lowered to the locked position approximately parallel to the floor, and its outer end is engaged with the receiver 2 (i.e., the outer end is brought into contact with the interior side of the wall panel P), the lever 10 is bridged from the door D to the wall panel P, thereby locking the door D. On the other hand, when the lever 10 is swung and raised to the unlocked position, which is nearly perpendicular to the floor, the outer end retracts from the interior side of the wall panel P, unlocking the door D and allowing the entrance to be opened and closed. The swing angle of the lever 10 between the locked and unlocked positions is about 90 degrees. The lever 10 is lightly fixed at the locked and unlocked positions by a known click stop mechanism (not shown).

[0036] As shown in FIGS. 1 and 2, the rectangular hole 13 of the mounting shaft 12 is fitted with an inner end of the rotary shaft 70 that passes through the door D. Therefore, when the lever 10 is swung, the rotating shaft 70 rotates forward and backward together with the lever 10. The outer end of the rotating shaft 70 , which forms a square shaft, passes through the outdoor base 60 and is inserted into a square hole provided in the center of the back surface of the display body 20 . Therefore, when the lever 10 is swung, the display body 20 rotates forward and backward via the rotation shaft 70.

[0037] An emergency unlocking portion 21 that can be engaged with an emergency unlocking key is fitted in the center of the display body 20. The emergency unlocking key may be of a special shape or form, or may be a general-purpose hexagonal wrench-like key. The emergency unlocking portion 21 rotates integrally with the display body 20.

[0038] 2, the outdoor base 60 has a circular opening 62 formed in its center, and the outdoor end of the rotating shaft 70 passes through this opening 62. In addition, screw holes 63 into which the above-mentioned bolts 61 are inserted are formed on both sides of the opening 62.

[0039] On the surface of the indicator 20, a locked mark and an unlocked mark are formed side by side in the circumferential direction. Examples of such a lock sign include a semicircular red sign or the word "occupied." Examples of such an unlock sign include a semicircular blue sign or the word "vacant."

[0040] 1 and 2, a cover 30 that covers the outdoor end of the display body 20 is attached to the outdoor seat 60. A display window 31 is opened in the upper half of the cover 30, and a part of the display body 20 is exposed through the display window 31. Therefore, in conjunction with the swinging of the lever 10, a locked indicator is displayed through the display window 31 of the cover 30 when the lever 10 is in the locked position, and an unlocked indicator is displayed when the lever 10 is in the unlocked position.

[0041] As shown in Fig. 2, the emergency unlocking part 21 is exposed from the center of the cover 30. If the user is unable to unlock the door D from inside the room due to sudden illness or other reasons, a rescuer can engage an emergency unlocking key with the emergency unlocking part 21 and forcibly rotate the rotating shaft 70 to swing the lever 10 from outside the room, thereby unlocking the door D.

[0042] As shown in FIG. 2, the rotating shaft 70 is divided into a driving shaft 71 on the indoor side and a driven shaft 72 on the outdoor side. The columnar driving shaft 71 has a key 71a on its outer periphery, while the cylindrical driven shaft 72 has a key groove 72a extending in its axial direction, with the outside end of the driving shaft 71 being inserted into the inside end of the driven shaft 72, and the key 71a of the driving shaft fitting into the key groove 72a of the driven shaft. This allows the driven shaft 72 to be shifted in the axial direction between an original position in which it is separated from the driving shaft 71 and a pushed-in position in which it is closer to the driving shaft 71. Furthermore, the driven shaft 72 is prevented from rotating in the circumferential direction of the driving shaft 71 by the engagement of the key 71a with the key groove 72a.

[0043] 2, a spring 73 is loaded between the driving shaft 71 and the driven shaft 72. As a result, the driven shaft 72 is biased to be in the original position under normal conditions, and can be pushed into the pushed-in position against the biasing force of the spring 73. Here, an engagement portion 74 that protrudes in the radial direction is formed on the outer periphery of the driven shaft 72 as shown in FIG.

[0044] As shown in FIG. 3, the spacer 40 has an accommodation groove 42 formed therein, which extends radially from its outer periphery to its inside, and this accommodation groove 42 intersects with an opening 41 extending in the axial direction of the spacer 40 . A slider 80 for child lock is accommodated in the accommodation groove 42. The plate-like slider 80 has a tab 81 at its rear end, and its front end is bifurcated into a pair of arms 82. The driven shaft 72 of the rotating shaft 70 is positioned between the pair of arms 82. In addition, an engaged portion 83 that is recessed toward the tab 81 is formed between the pair of arms 82, and the engaging portion 74 of the driven shaft 72 is aligned so as to face this engaged portion 83 when the driven shaft 72 is in the original position and the lever 10 is in the locked position. Of the pair of bolts 61 for fixing the indoor and outdoor seats 50, 60, one of the bolts 61 passes through the inside of the engaged portion 83.

[0045] When the lever 10 is in the locked position, moving the slider 80 forward as shown in Figures 3(a) to 3(b) (below, Figures 3 to 7 are schematic views, and therefore the structures of the parts are simplified), the engaging portion 74 of the driven shaft 72 fits into the engaged portion 83 of the slider 80 due to the positional relationship described above, thereby disabling the rotation shaft 70. Therefore, the lever 10, which is linked to the rotation of the rotation shaft 70, cannot be swung, and the child lock is activated. 3(b) to (a), when the slider 80 is retracted, the engaging portion 74 of the driven shaft 72 comes out of the engaged portion 83 of the slider 80, and the rotating shaft 70 becomes rotatable. Therefore, the lever 10 can be swung, and the child lock is released. In this manner, the tab 81 of the slider 80 can be pinched and slid along the interior side surface of the door D between the locked position and the unlocked position. This child lock prevents a child inside the house from operating the lever and unlocking the door without your eyes on the door.

[0046] As shown in FIG. 2(b), a triangular ridge 84 is formed on the surface opposite to the opposing surfaces of the pair of arms 82, and a ball 43 is inserted into the opposing surface of the spacer 40 facing this ridge 84 and is pressed against the ridge 84 by a spring 44. This constitutes a biasing means in which, with the apex of the peak 84 serving as a biasing switching point, when the apex of the peak 84 of the slider 80 is located closer to the unlocked position than the ball 43, the slider 80 is biased toward the unlocked position, and when the apex of the peak 84 of the slider 80 is located closer to the locked position than the ball 43, the slider 80 is biased toward the locked position. Therefore, the slider 80 is guided by the force of the spring 44 to either the locked position or the unlocked position, and does not stop in an intermediate position.

[0047] 4(a), when the lever 10 is in the locked position and the slider 80 is in the locked position, if a key is engaged with the emergency unlocking part 21 from outside the room and a pushing force that overcomes the force of the spring 73 is applied, the driven shaft 72 shifts in the axial direction to the pushed-in position. Therefore, as shown in FIG. 4(b), the positional relationship between the engaging part 74 of the driven shaft 72 and the engaged part 83 of the slider 80 shifts in the axial direction, and the engaging part 74 comes out of the engaged part 83 in the axial direction. Therefore, even when the slider 80 is in the locked position, the lock is released and it is possible to unlock the door by rotating the rotating shaft 70 from the outside of the room and operating the lever 10 from the locked position to the unlocked position. That is, in this embodiment, a clutch is formed between the slider 80 and the driven shaft 72 of the rotating shaft 70 to connect and disconnect the two, and the child lock by the slider 80 does not function during emergency unlocking. This allows the lever 10 to be smoothly swung from outside the room, and since no load is applied to the slider, failure of the slider is also prevented.

[0048] Furthermore, in this embodiment, as shown in FIG. 4(d), a first contact portion 90 is provided on the opposing surfaces of the pair of arms 82 of the slider 80, against which the engagement portion 74 can come into contact when the driven shaft 72 is in the original position. As a result, even if the slider 80 remains in the locked position immediately after emergency unlocking, when the next user etc. operates the lever 10 from the unlocked position to the locked position, the engagement portion 74 presses the first abutment portion 90 of the slider 80 as the driven shaft 72 rotates in the locking direction, and the slider 80 is also pushed back from the locked position to the unlocked position, thereby returning the child lock to a state in which it is not used. Therefore, it is possible to avoid an abnormal situation in which the slider 80 remains in the locked position even though the next user has no intention of using the child lock function.

[0049] FIG. 4 illustrates the operation during emergency unlocking. FIG. 5 illustrates the operation when, due to mischief, erroneous operation, etc., the slider 80 is advanced from the unlocked position to the locked position after using the toilet and the user leaves the toilet. Even if the lever 10 is in the unlocked position, if the slider is slid to the locked position by tampering or other means as shown in Figure 5(b), the phase of the engaging portion 74 of the driven shaft 72 shifts circumferentially and no longer faces the engaged portion 83 of the slider 80. In this case, when the lever 10 is swung in the locking direction as shown in FIG. 5(c), the engagement portion 74 of the driven shaft 72 presses the first abutment portion 90 of the slider 80, so that the slider 80 is pushed back from the locked position to the unlocked position, and automatically returns to the unlocked position.

[0050] The pushing back of the slider 80 by the engaging portion 74 of the driven shaft 72 is limited to within a specified rotation angle where the engaging portion 74 abuts against the first abutment portion 90 of the slider 80, but before that abutment ends, the slider 80 is adjusted to be positioned closer to the unlocked position than the force switching point. Therefore, after the contact is completed, the slider 80 is automatically guided to the unlocked position by the bias of the spring 44.

[0051] Fig. 6 shows a first modified example of the embodiment. Description of the same configuration as in the embodiment shown in Figs. 1 to 5 will be omitted. In this example, the driven shaft 72 has a kick-out portion 75 on its outer periphery that protrudes from a position that is circumferentially shifted in phase from the engagement portion 74 by approximately 180 degrees (note that in FIG. 2, for convenience, the kick-out portion 75 is shown corresponding to the first modified example). The slider 80 also has a second contact portion 91 on the opposing surface of the pair of arms 82 against which the kick-out portion 75 can come into contact when the driven shaft 72 is in the pushed-in position. During emergency unlocking, when the driven shaft 72 is in the pushed-in position, as shown in Figures 6(c) to (d), as the driven shaft 72 rotates in the unlocking direction, the kick-out portion 75 presses the second abutment portion 91 of the slider 80, thereby kicking the slider 80 out from the locked position to the unlocked position. Therefore, when the door is unlocked from the outside, the lever 10 returns to the unlocked position and the slider 80 returns to the unlocked position at the same time.

[0052] 6(e), it is also possible to adjust the thickness, position, etc. of the kick-out portion 75 and the second abutment portion 91 of the driven shaft 72 so that the kick-out portion 75 can abut against the second abutment portion 91 of the slider 80 even when the driven shaft 72 is in the original position. In the drawing, the thickness of the kick-out portion 75 is made large. In this case, even if someone tries to slide the slider 80 to the lock position by mischief or the like when the lever 10 is in the unlocked position, the sliding operation cannot be completed because the kick-out portion 75 interferes with the second abutment portion 91. At this time, if the slider 80 is adjusted to be positioned closer to the unlocked position than the switching point of the biasing force, the slider 80 will automatically return to the unlocked position.

[0053] In addition, in this modified example 1 ,figure Like 4 Function to push slider 80 It is also possible to provide an embodiment that achieves both of the above.

[0054] Fig. 7 shows a second modified example of the embodiment. Description of the same configuration as in the embodiment shown in Figs. 1 to 5 will be omitted. In this example, at least one of the radial outer edge of the engaging portion 74 of the driven shaft 72 and the radial outer edge of the engaged portion 83 of the slider 80 forms a tapered surface that is inclined in the circumferential direction of the rotating shaft 70, and is configured to engage with each other via this tapered surface. In this example, the engaging portion 74 and the engaged portion 83 have tapered surfaces 74a and 83a that are inclined in the same direction. As a result, when the lever 10 is locked and the child lock is activated, if a predetermined torque is applied to the driven shaft 72 by operating the lever 10, the interaction between the tapered surfaces 74a, 83a causes the driven shaft 72 to shift axially from the original position toward the pushed-in position so that the engaging portion 74 comes out of the engaged portion 83. Therefore, even if you forget that you have set the child lock and try to forcefully swing the lever 10 in the unlocking direction from inside the room, the child lock is automatically released and you can swing the lever 10, without damaging the lever, slider, etc. Also, when trying to emergency unlock from outside the room while the child lock is set, even if you forget to press in the emergency unlocking key and forcefully turn it in the unlocking direction, it will still be unlocked, so in this case too, the lever, slider, etc. will not be damaged.

[0055] Fig. 8 shows a third modified example of the embodiment. Description of the same configuration as in the embodiment shown in Figs. 1 to 5 will be omitted. In this example, a lock mark 86 and an unlock mark 87 are provided in parallel in the sliding direction at the intermediate portion between a tab 81 and an arm 82 of a slider 80. Further, the spacer 40 is provided with a sleeve portion 45, and the sleeve portion 45 has a display window 46 formed therein. This constitutes a child lock display section, and in conjunction with the sliding operation of the slider 80, a lock sign 86 and an unlock sign 87 can be alternately displayed in the display window 46. This makes it easy to visually check again indoors whether the child lock is on or not. The lock mark 86 may be displayed in red or may display the text "Child Lock". The unlock mark 87 may be displayed in blue or may display the text "Child Lock Release".

[0056] The embodiments disclosed herein are illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, and includes all modifications and alterations within the scope and equivalent meanings. For example, in the embodiment, the striker 1 is provided with a mechanism consisting of an indicator 20 that displays whether the lock is locked or unlocked on the outside of the room, but the present invention is also applicable to striker locks that do not have such a mechanism. [Explanation of symbols]

[0057] 1 Strike Lock 2 Receptacle 10 Lever 11 Rotating seat 12 Mounting shaft 13 square hole 14 Surase 20 Display body 21 Emergency unlocking section 30 Cover 31 Display window 40 Spacer 41 Aperture 42 Storage Groove 43 Ball 44 Spring 45 Sleeves 46 Display window 50 Indoor seat 51 Screw Tube 52 Bearing hole 60 Outdoor seat 61 Volts 62 Aperture 63 Screw hole 70 Rotational Axis 71 Driving shaft 71a Key 72 Driven axis 72a Keyway 73 Spring 74 Engagement part 74a Tapered surface 75 Kick-out section 80 Slider 81 Tabs 82 Arm 83 Engaged part 83a Tapered surface 84 Yamabe 86 Rock Sign 87 Unlock Sign 90 First contact portion 91 Second contact part D Door P wall panel

Claims

1. A striker lock that is attached to a wall panel that separates an interior from an exterior, or to a door that opens and closes an entrance to the wall panel, and that locks and unlocks the door by operating it from the interior side of the room, a lever rotatably supported along an interior side surface of either the door or the wall panel; a rotating shaft that penetrates the side of either the door or the wall panel on which the lever is supported and rotates forward and backward in conjunction with the swing operation of the lever; a slider supported approximately parallel to the interior side surface of either the door or the wall panel on which the lever is supported, the slider being slidable between a lock position where the slider engages with the rotating shaft to prevent the rotating shaft from rotating and an unlock position where the slider allows the rotating shaft to rotate; In an emergency, the rotating shaft can be rotated from the outside of the room using an emergency unlocking key to swing the lever from the door lock position to the door unlock position. At least a portion of the rotation shaft is axially shiftable between an original position away from the lever and a pushed-in position approaching the lever, and is biased toward the original position, A strike lock in which a clutch is formed between the rotating shaft and the slider, such that when the lever is in the door locking position and the slider is in the locking position, the engagement between the rotating shaft and the slider is released and the rotation of the rotating shaft is permitted when the rotating shaft is in the pushed-in position.

2. The rotating shaft has an engagement portion protruding in a radial direction on an outer periphery thereof, the slider has an engaged portion that can be engaged with an engaging portion of the rotating shaft, The clutch is When the lever is in the locked position and the slider is in the locked position, 2. A strike lock as described in claim 1, wherein when the rotating shaft is in the original position, the engaging portion engages with the engaged portion, and when the rotating shaft is in the pushed-in position, the engaging portion shifts axially relative to the engaged portion to release the engagement, thereby allowing rotation.

3. the slider has a first abutment portion that can abut against the engagement portion when the lever is near the unlocked position and the slider is in the locked position, 3. The strike lock according to claim 2, wherein the slider is pushed back from the locked position to the unlocked position by the engagement portion pushing the first contact portion as the rotating shaft rotates in the locking direction.

4. The rotating shaft has a kick-out portion that protrudes in a radial direction from a position that is circumferentially out of phase with the engagement portion, the slider has a second abutment portion against which the kick-out portion can abut when the rotation shaft is in the pushed-in position, 3. The strike lock according to claim 2, wherein when the rotating shaft is in the pushed-in position, the kick-out portion presses the second abutment portion as the rotating shaft rotates in the unlocking direction, thereby kicking out the slider from the locked position to the unlocked position.

5. a tapered surface inclined in a circumferential direction of the rotating shaft is formed on at least one of a radial outer edge of the engaging portion and a radial outer edge of the engaged portion, A strike lock as described in any one of claims 2 to 4, wherein when a predetermined torque is applied to the rotating shaft by operating the lever, the interaction of the tapered surfaces between the radial outer edges of the engaging portion and the engaged portion causes the rotating shaft to shift axially against the bias so that the engaging portion disengages from the engaged portion, thereby releasing the engagement.

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