JP7022652B2 - Slide latch lock - Google Patents

Description

The present invention relates to a slide latch lock.

Some doors of toilet rooms, shower rooms, etc. are hung on the building side via hinges on the opposite side of the door. This type of door is installed so that it can open inwardly to open the door indoors and open outwards to open the door outwards. In the case of inward opening, when a person in the room opens the door, it is possible to prevent an accident in which the door hits another person outside the room. For this reason, inward-opening doors are often used in public facilities where an unspecified number of users enter and exit.

Conventionally, as a lock used for an inward-opening door, a pedestal attached to the indoor side of the door, a latch slidably supported by the pedestal, and a latch attached to the indoor side of the wall facing the door end of the door. A slide latch lock with a receiver is used. The latch is slidably provided between a locking position that locks the door to the latch receiver so that the door cannot be opened indoors, and an unlocking position that allows the door to escape from the latch receiver and be opened indoors. ..

Among them, slide latch locks with an emergency unlocking function are widespread. This type of slide latch lock further includes a motion conversion mechanism that converts the slide of the latch into the rotational motion of the rotary shaft, and the rotary shaft is rotated by the torque from the unlocking tool used from the outdoor side. Therefore, when an emergency occurs in which a person in the room cannot open the door by himself / herself due to injury or illness, the rescuer can slide the latch to the unlocking position by using the unlocking tool (for example, Patent Document). 1, 2).

Japanese Unexamined Patent Publication No. 2005-120767 Japanese Unexamined Patent Publication No. 2009-174176

However, even if the latch is slid to the unlocked position by the emergency unlocking function, the rescuer in the room leans against the door, and even if the rescuer outside the room pushes the door inward, the door cannot be opened inward. Things can happen.

In order to prepare for this situation, the door can be opened to the outside of the room, usually used as an inward opening door, and the door opening is restricted by a movable door stop attached to the building side. In an emergency when the rescuer cannot open the door inward, a booth is being constructed that can move the door stop to lift the door regulation and open the door outward. Installation cost will be a burden.

Therefore, an object to be solved by the present invention is to provide a slide latch lock suitable for using a door with an inward opening in a normal state and using the door with an outward opening in an emergency.

In order to solve the above-mentioned problems, the present invention has a pedestal attached to the indoor side of the door and a latch slidably supported by the pedestal and detachable with respect to a latch receiver provided on the door frame on the indoor side. In a slide latch lock that is provided with a motion conversion mechanism that converts the slide of the latch into the rotational motion of the rotary axis, and the rotary axis is rotated by the operation of the unlocking tool from the outdoor side, the slide of the latch is The latch is further provided with a stopper movably arranged between a lock position for stopping and an unlock position for allowing the latch to slide, and an elastic member for urging the stopper toward the lock position. However, a locking position that prevents the door from opening to the outdoor side and the indoor side, and an inward opening unlocking position that allows the door to open to the indoor side but prevents the door from opening to the outdoor side. The door is slidably provided between the unlocking position for opening outside and the unlocking position for opening to the outside of the room, and the locking position is set to a position where the latch is stopped at the unlocking position for opening inward. Therefore, a configuration is adopted in which the stopper is moved to the unlocking position and the latch is moved to the unlocking position for opening outward by pushing and turning the unlocking tool.

According to the above configuration, normally, the stopper at the lock position restricts the latch so that it cannot slide to the unlocked position for opening outward, so it is possible to use the door with the door open inward, but the latch outside the door. The opening can be regulated. When using the emergency unlocking function, the latch can be slid to the unlocking position for outward opening by pushing and turning the unlocking tool, and the door opening restriction can be released. For this reason, there is no need for a door stop to regulate the opening of the door in normal times.

For example, the pedestal has a guide groove that guides the latch in the sliding direction, the latch has a meshing wall that is guided by the guide groove, and the stopper is in the locked position. It is preferable to have a lock portion that faces the wall in the sliding direction and forms a path for the meshing wall when it is in the unlocked position. In this way, the latch slide can be restricted by the stopper using the latch guide structure.

Further, a display frame attached to the outdoor side of the door is further provided, and the display frame accommodates a display unit linked to the rotational movement of the rotation shaft, and the latch is stopped at the lock position. Even when the display unit displays the used display surface on the window of the display frame and the latch is stopped at either the inward opening unlocking position or the outward opening unlocking position, the display unit is the window. It is preferable to display the unused display surface. In this way, even when the door is normally closed, it is possible to indicate whether or not the door is locked outdoors.

As described above, in the present invention, by adopting the above configuration, the door is restricted to open inward by the slide restriction of the latch, and the door is restricted to open outward by the latch to eliminate the need for a door stop. A slide latch lock suitable for use with an inward opening and for use with an outward opening of the door in an emergency can be provided.

Longitudinal front view showing the usage state of the slide latch lock according to the embodiment of the present invention. Top view showing the latch receiver of FIG. 1 from the indoor side. Right side view showing the door side component of the slide latch lock of FIG. Bottom view showing the display frame of FIG. Bottom view showing a latch at the unlocking position for inward opening and a stopper at the locking position in FIG. Front view showing the pedestal and the stopper at the lock position in FIG. Bottom view showing a latch at the unlocking position for outward opening and a stopper at the unlocking position in FIG. FIG. 1 is a cross-sectional view showing a pedestal and a stopper at an unlocked position. Front view showing the pedestal and the stopper at the unlocked position in FIG.

An embodiment of the present invention will be described with reference to the accompanying drawings.

The slide latch lock shown in FIG. 1 has a pedestal 20 attached to the indoor side of the door 10, a latch receiver 31 provided on the door frame 30 on the indoor side, and a latch receiver 31 slidably supported by the pedestal 20. With an emergency unlocking function and a display, the latch 40 can be engaged with and detached from the door 10, a motion conversion mechanism for converting the slide of the latch 40 into a rotational motion of the rotary shaft 50, and a display frame 60 attached to the outdoor side of the door 10. It has a function. In the following, the direction along the rotation axis of the rotation axis 50 is referred to as "axial direction", and the direction perpendicular to the axis direction is referred to as "diametrical direction".

The door 10 is hung on the building side via a hinge (not shown) on the side opposite to the door tip 11 of the door 10. The door 10 can be installed so that it can be opened outward by rotating in the direction of arrow A around the hinge and opening to the outside of the room, or by rotating in the direction of arrow B around the hinge and opening to the inside of the room. It has become. The door 10 may be either a normally closed type or a normally open type. The normally closed type door means a door urged toward the closed position by an urging means such as a gravity hinge. In the closed position, the door end 11 of the door 10 faces the door frame 30 and can be locked with a slide latch lock. The normally open type door is a door in which the door 10 is urged in the opening direction by the above-mentioned urging means.

The pedestal 20 has an inner base 21 in contact with the indoor side of the door 10. The display frame 61 has an outer base 61 in contact with the outdoor side of the door 10. The pedestal 20 and the display frame 61 are attached to the door 10 by screwing the screw 70 from the indoor side into the screw boss portion of the outer base 61 and fastening the inner base 21, the outer base 61 and the door 10.

As shown in FIGS. 1 and 2, the latch receiver 31 is composed of a fixing member attached to the indoor side of the door frame 30. The latch receiver 31 is screwed to the door frame 30. The latch receiver 31 has a locking surface 32 protruding into the air. In addition, in FIG. 2, the illustration of the screw is omitted.

As shown in FIGS. 1 and 3, the inner base 21 has a pair of guide grooves 22 for guiding the latch 40 in the sliding direction, and a recess 23 surrounding the rotation shaft 50.

A stopper 80 and an elastic member 90 are housed in the recess 23. The stopper 80 is composed of an annular component that fits between the recess 23 and the rotating shaft 50. The elastic member 90 is made of a coil spring. The pedestal 20 has a holding plate 24 that receives the stopper 80 and the elastic member 90 in the axial direction. The presser plate 24 is screwed to the inner base 21. The axial movement of the stopper 80 is restricted by the bottom surface of the recess 23 and the holding plate 24, and the radial movement of the stopper 80 is restricted by the inner circumference of the recess 23. The elastic member 90 is interposed between the stopper 80 and the bottom surface of the recess 23. The radial movement of the elastic member 90 is limited by the inner circumference of the stopper 80.

The guide groove 22 extends in the left-right direction from the recess 23 to the right end surface of the inner base 21. The sliding direction of the latch 40 is the left-right direction in FIG.

As shown in FIGS. 1 to 3, the latch 40 has a latch cover 41 and a pair of meshing walls 42 guided by a guide groove 22.

The latch cover 41 has a shape that is long dented in the left-right direction on the pedestal 20 side, is closed at the left end portion thereof, and is opened at the right end portion thereof so as not to interfere with the latch receiver 31. The latch cover 41 serves as a gripping portion when the latch 40 is slid.

The pair of meshing walls 42 consist of a fixing member attached to the latch cover 41. The meshing wall 42 extends long in the left-right direction so as to always have a portion located in the guide groove 22.

The latch 40 allows a locking position that locks on the latch receiver 31 to prevent the door 10 from opening to the outdoor side and the indoor side, and allows the door 10 to escape from the latch receiver 31 and open to the indoor side. Slide between the inward opening unlocking position that straddles the door 10 and the door frame 30 to prevent the door 10 from opening to the outside, and the outward opening unlocking position that allows the door 10 to open to the outside. It is provided as possible. In FIGS. 1 and 2, the latch 40 at the inward opening unlocking position is indicated by a solid line, and the outer shape of the right end portion of the latch at the locking position is indicated by a dotted line with a reference numeral 40'. 40 ”is attached and the outer shape of the left and right ends of the latch at the unlocking position for outward opening is indicated by a alternate long and short dash line.

As shown in FIGS. 1 and 2, when the latch 40 is in the locked position, the right end portion of the meshing wall 42 enters the space between the locking surface 32 and the door frame 30 and faces the engaging surface 32. The latch cover 41 faces the door frame 30 side (latch receiver 31 and door frame 30). At this time, when the door 10 tries to open to the outdoor side, the latch 40 can come into contact with the latch receiver 31 to prevent the opening, and when the door 10 tries to open to the indoor side, the meshing wall It is possible that the 42 is caught on the locking surface 32 to prevent the opening.

When the latch 40 is in the inward opening unlock position, the meshing wall 42 escapes from the space between the locking surface 32 and the door frame 30, but the latch cover 41 faces the door frame 30 side. be. At this time, when the door 10 tries to open to the indoor side, the latch 40 abuts on the door frame 30 side to prevent the opening, but when the door 10 tries to open to the indoor side, the meshing wall The 42 cannot be caught by the latch receiver 31, and it is impossible to prevent the opening.

When the latch 40 is in the unlocking position for outward opening, the latch 40 is located inside the turning radius of the door 10 (the circumference including the arrows A and B in FIG. 1). At this time, even if the door 10 tries to open to either the outdoor side or the indoor side, the latch 40 cannot be caught on the door frame 30 side, and it is impossible to prevent the opening.

The rotary shaft 50 shown in FIG. 1 has a structure in which a square hole of the pinion shaft 51 on the indoor side and a square hole of the transmission shaft 52 on the outdoor side are connected via a square bar. A pinion gear 53 is connected to the pinion shaft 51. The pinion gear 53 meshes with the rack 54 attached to the latch 40. An emergency unlocking portion 55 exposed from the display frame 60 is connected to the transmission shaft 52. The pinion shaft 51 penetrates the inner base 21 and the stopper 80 in the axial direction, and the transmission shaft 52 penetrates the outer base 61 in the axial direction. The pinion shaft 51 is rotatably supported at the through hole of the inner base 21, and the transmission shaft 52 is rotatably supported at the through port of the outer base 61. The pinion shaft 51, the transmission shaft 52, the pinion gear 53, and the emergency unlocking portion 55 are integrally rotatably connected around the same axis.

As shown in FIGS. 1 and 4, the emergency unlocking portion 55 has a concave shape to which the unlocking tool K can be connected at a portion exposed axially from the opening formed in the display frame 61 to the outdoor side. Have. The rotation shaft 50 and the pinion 53 are integrally rotated by the torque of the rotation operation applied to the emergency unlocking portion 55 from the unlocking tool K on the outdoor side of the door 10. Although the key of a special product is exemplified as the unlocking tool K, it is not necessary to make it a special product, and for example, a general-purpose product such as a coin or a flat-blade screwdriver may be adopted.

The motion conversion mechanism described above comprises a rack and pinion mechanism that converts the left-right slide of the latch 40 into forward and reverse rotational motion of the rotation shaft 50 over the entire slide stroke of the latch 40 by the pinion gear 53 and the rack 54.

The display frame 61 has a display cover 62 that covers the outer base 61. The display cover 62 is attached to the outer base 61. The display frame 61 accommodates the display unit 63 interlocked with the rotational movement of the rotary shaft 50 and the spring member 91 between the outer base 61 and the display cover 62.

The display unit 63 is provided integrally with the transmission shaft 52. The spring member 91 is interposed between the transmission shaft 52 and the outer base 61. The spring member 91 is made of a coil spring. The spring member 91 is for returning the transmission shaft 52 to the axial position before the movement when the transmission shaft 52 moves in the axial direction.

As shown in FIG. 4, the display cover 62 is formed with a window 64 through which a part of the display unit 63 can be seen through. The display unit 63 has an annular plate shape concentric with the transmission shaft 52. The display unit 63 has a used display surface 65 for half a circumference and an unused display surface 66 for the other half of the annular surface region facing the window 64 in the axial direction. The used display surface 65 is, for example, a red surface and a character notation of "in use". The unused display surface 66 is, for example, a blue surface and a character display of "empty". In FIG. 4, "red" is written in the area of the used display surface 65, "blue" is written in the area of the unused display surface 66, and the boundary line between them is shown by a broken line.

The stopper 80 shown in FIG. 1 can move between a lock position for stopping the slide of the latch 40 (see FIGS. 5 and 6) and an unlock position for allowing the latch 40 to slide (see FIGS. 7 to 9). Is located in. The elastic member 90 urges the stopper 80 toward the lock position.

The stopper 80 faces the meshing wall 42 in the sliding direction when it is in the lock position shown in FIGS. 1, 5, and 6, and the path of the meshing wall 42 when it is in the unlock position shown in FIGS. 7 to 9. It has a lock portion 81 forming the 82.

As shown in FIGS. 1, 5, and 6, the lock position by the lock portion 81 is set to a position where the latch 40 is stopped at the inward opening unlock position. The lock portion 81 at the lock position faces the notch 43 formed in the meshing wall 42 in the left-right direction. Therefore, the meshing wall 42 cannot proceed to the left of the guide groove 22. This facing relationship holds when the latch is in either the inward opening unlocking position or the locking position. In addition, in FIG. 5, the state in which the lock portion 81 of the stopper 80 abuts on the recessed portion 43 of the meshing wall 42 in the slide direction (left direction) and is stopped at the unlocking position for inward opening is shown by a solid line, and the latch is shown. The position of the stopper when is in the locked position is indicated by a one-dot chain line with a reference numeral 80'.

As shown in FIGS. 7 to 9, the lock portion 81 at the unlocked position is located at an axial position that does not face the meshing wall 42 in the left-right direction, and forms a passage 82 between the meshing wall 42 and the inner base 21. The inner base 21 has a one-sided guide surface 25 facing the lock portion 81 in the axial direction, and an extension guide groove 24 extending on the left extension of the guide groove 22. The passage 82 is formed in a groove shape extending in the left-right direction between the lock portion 81 and the guide surface 25. The passage 82, the guide groove 22, and the extension guide groove 24 form a series of groove spaces in the left-right direction. This series of groove spaces is a moving space in which the meshing wall 42 can slide in the left-right direction. Only when this series of groove spaces is established, the latch can be slid to the unlocking position for outward opening as shown in FIGS. 1 and 7. In FIG. 7, the position of the stopper 80 when the latch is in the unlocking position for outward opening is shown by a solid line and a hidden line, and the stopper at the position of FIG. 5 is shown by a long-dotted chain line.

As shown in FIGS. 1 and 8, the rotating shaft 50 and the stopper 80 have engaging ring portions 56 and 82 that abut against each other in the axial direction. The engaging ring portion 82 of the stopper 80 is formed as a part of the inner circumference through which the rotating shaft 50 is passed. The engaging ring portion 56 of the rotating shaft 50 is formed as a part of the outer periphery of the pinion shaft 51. The rotating shaft 50 is arranged so as to be movable in the axial direction with respect to the pedestal 20 so as to allow the stopper 80 to move in the axial direction between the locked position and the unlocked position. The rotary shaft 50 has a structure in which torque is transmitted between the rotating portion (pinion gear 53) of the motion conversion mechanism and the emergency unlocking portion 55 on the outdoor side, and axial force is transmitted between the rotary shaft 50 and the stopper 80. All you need is.

That is, as shown in FIG. 1, when no external force is applied axially from the outdoor side to the indoor side with respect to the emergency unlocking portion 55, the stopper 80 is in the locked position, and the stopper 80 and the pedestal 20 ( There is an axial gap between the presser plate 24) and the presser plate 24). On the other hand, when the external force is applied to the emergency unlocking portion 55 and the rotating shaft 50 is pushed and moved in the axial direction against the spring member 91 and the elastic member 90, the rotating shaft 50 in the engaging ring portion 82 The stopper 80 pushed in the axial direction from the engaging ring portion 56 of the above is also pushed in the axial direction, and finally, as shown in FIG. 8, the stopper 80 is moved to the unlocked position in contact with the holding plate 24 side. Be done. When the external force is no longer applied, the stopper 80 and the rotating shaft 50 are returned to the positions shown in FIG. 1 by the elastic repulsive force of the spring member 91 and the elastic member 90.

Since the emergency unlocking portion 55 is not normally pushed, the stopper 80 is supported on the pedestal 20 in the axial direction via the rotating shaft 50, the elastic member 90, and the spring member 91 as described above. On the other hand, it is maintained in the locked position (see FIGS. 1 and 4 to 6 as appropriate below). Therefore, the latch 40 is slid between the locking position and the inward opening unlocking position. Therefore, when the latch 40 is slid to the right from the unlocking position for inward opening to the locking position, the slide is converted into the rotary motion of the rotary shaft 50 by the motion conversion mechanism, and the display unit 63 integrated with the rotary shaft 50 is generated. The portion displayed on the window 64 of the display frame 60 is switched from the unused display surface 66 to the used display surface 65 by the rotational movement of. Further, by sliding the latch 40 to the left from the locking position to the unlocking position for inward opening, the motion conversion mechanism converts the latch 40 into a reverse rotational motion, and the portion displayed on the window 64 of the display frame 60 is used. The display surface 65 can be switched to the unused display surface 66. When the latch 40 is further slid to the left from the inward opening unlocking position to the outward opening unlocking position, the lock portion 81 of the stopper 80 at the lock position comes into contact with the latch 40, and the latch 40 slides. Is stopped. Therefore, the latch 40 cannot slide to the unlocking position for outward opening, and is limited to the unlocking position for inward opening straddling between the door 10 and the door frame 30. Therefore, although it is possible to use the door 10 inwardly, the latch 40 can regulate the outward opening of the door 10.

On the other hand, in an emergency, when the rescuer connects the unlocking tool K to the emergency unlocking portion 55 and pushes and turns the unlocking tool K, the pushing force causes the elastic member 90 and the spring via the rotating shaft 50. The member 91 is compressed in the axial direction, and accordingly, the stopper 80 is moved from the locked position to the unlocked position and maintained in the unlocked position with respect to the pedestal 20 (hereinafter, as appropriate, FIGS. 1 and 4). , See FIGS. 7-9). Therefore, when the latch 40 is slid between the locking position and the unlocking position for outward opening, the locking portion 81 of the stopper 80 at the unlocking position does not come into contact with the meshing wall 42. At this time, the rotary torque of the pushing operation of the unlocking tool K causes the rotary shaft 50 to rotate, and the rotary motion of the rotary shaft 50 is converted into a slide to the left of the latch 40 in the motion conversion mechanism. Finally, the latch 40 is slid to the left from the locking position to the outward opening unlocking position. When the release tool K becomes unable to be pushed and turned, the latch 40 is in the unlocking position for outward opening. Further, while the latch 40 is slid from the locking position to the unlocking position for outward opening, the portion displayed on the window 64 of the display frame 60 is also switched by the rotational movement of the display unit 63 that rotates integrally with the rotation shaft 50. Be done. That is, in the process in which the latch 40 is slid from the locked position to the inward opening unlocking position, the used display surface 65 is switched to the unused display surface 66, and the latch 40 is unlocked from the inward opening unlocking position to the outward opening unlocking position. In the process of sliding to the position, the unused display surface 66 is switched to the used display surface 65, and then the unused display surface 66 is switched again. The rescuer learns that the door 10 can be opened inward at the time of displaying the first unused display surface 66, and at the time of displaying the unused display surface 66 after the release tool K cannot be pushed around. It can be known that the door 10 can be opened to the outside.

As described above, this slide latch lock is normally restricted by the stopper 80 at the lock position so that the latch 40 cannot slide to the unlock position for outward opening, so that the door 10 can be used with the door 10 opened inward. However, the latch 40 can restrict the outward opening of the door 10. Further, when using the emergency unlocking function, this slide latch lock can slide the latch 40 to the unlocking position for outward opening by pushing and turning the unlocking tool K, and release the outward opening restriction of the door 10. can. Therefore, a door stop for restricting the outward opening of the door 10 is not required at normal times. Therefore, this slide latch lock can be provided as suitable for using the door 10 with the door 10 open in the normal time and using the door 10 with the door open outward in an emergency.

Further, in this slide latch lock, the pedestal 20 has a guide groove 22 that guides the latch 40 in the slide direction, the latch 40 has a meshing wall 42 that is guided by the guide groove 22, and the stopper 80 is in the lock position. Since it has a lock portion 81 that sometimes faces the meshing wall 42 in the sliding direction and forms a passage 82 of the meshing wall 42 when it is in the unlocked position, the stopper 80 uses the latch guide structure (22, 42). The slide of the latch 40 can be restricted by the above.

Further, this slide latch lock includes a display frame 60 attached to the outdoor side of the door 10, the display frame 60 accommodates a display unit 63 interlocked with the rotational movement of the rotating shaft 50, and the latch 40 is in the locked position. In the stopped state, the display unit 63 displays the used display surface 65 on the window 64 of the display frame 60, and the display unit 63 is in a state where the latch is stopped at either the inward opening unlocking position or the outward opening unlocking position. Displays the unused display surface 66 on the window 64, so that even when the door 10 is normally closed, it can be displayed outdoors whether or not the door is locked.

In this slide latch lock, the rotation center of the display unit 63 is set as the rotation axis 50, and the slide stroke of the latch 40 and the rotation angle of the display unit 63 are determined only by the gear ratio between the rack 54 and the pinion gear 53. The center of rotation of the unit may be a rotation axis different from the rotation axis, and a reduction gear (for example, a gear reduction gear) may be interposed between these rotation shafts to suppress a plurality of rotations of the display unit. The embodiments disclosed this time should be considered to be exemplary and not restrictive in all respects. Therefore, the scope of the present invention is shown by the scope of claims rather than the above description, and it is intended that all modifications within the meaning and scope equivalent to the scope of claims are included.

10 Door 20 Pedestal 22 Guide groove 30 Door frame 31 Latch receiver 40 Latch 42 Mating wall 50 Rotating shaft 53 Pinion gear 54 Rack 55 Emergency unlocking unit 60 Display frame 63 Display unit 64 Window 65 Used display surface 66 Unused display surface 80 Stopper 81 Lock part 82 Path 90 Elastic member

Claims (3)

A pedestal that can be attached to the indoor side of the door,
A latch that is slidably supported by the pedestal and can be engaged with and detached from the latch receiver provided on the door frame on the indoor side.
A motion conversion mechanism that converts the slide of the latch into the rotational motion of the axis of rotation,
Equipped with
In a slide latch lock in which the rotation axis is rotated by operating the unlocking tool from the outdoor side.
A stopper arranged so as to be movable between a lock position for stopping the slide of the latch and an unlock position for allowing the slide of the latch.
Further provided with an elastic member that urges the stopper toward the lock position.
The locking position where the latch prevents the door from opening to the outdoor side and the indoor side, and the unlocking position for inward opening which allows the door to open to the indoor side but prevents the door from opening to the outdoor side. It is provided so as to be slidable between the door and the unlocking position for opening the door, which allows the door to be opened to the outside of the room.
The lock position is set to a position where the latch is stopped at the inward opening unlocking position.
A slide latch lock characterized in that the stopper is moved to the unlocked position and the latch is moved to the unlocked position for outward opening by pushing and turning the unlocking tool. The pedestal has a guide groove that guides the latch in the sliding direction.
The latch has a meshing wall guided by the guide groove.
The slide latch according to claim 1, wherein the stopper has a lock portion that faces the meshing wall in the sliding direction when the stopper is in the locked position and forms a path for the meshing wall when the stopper is in the unlocked position. Lock. Further equipped with a display frame attached to the outdoor side of the door,
The display frame accommodates a display unit linked to the rotational movement of the rotation axis.
In the state where the latch is stopped at the locking position, the display unit displays the used display surface on the window of the display frame, and the latch is set to either the inward opening unlocking position or the outward opening unlocking position. The slide latch lock according to claim 1 or 2, wherein the display unit displays an unused display surface on the window even when the lock is stopped.

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