JP7601385B2 - Door and window locks - Google Patents

Description

The present invention relates to a fixture lock that is attached to the door of a private room used in a toilet or the like, and that can open the door by operating it from outside even if the door is locked and cannot be opened because the private room is in use.

Conventionally, various types of fitting locks are known that are attached to the doors of stalls used in toilets and the like, and that, even if the stall is locked and cannot be opened because the stall is in use, in the event of an emergency where the occupant is unable to open the door themselves due to illness or other reasons, the door can be opened by someone else operating it from outside, allowing the occupant to be rescued, etc.

For example, Patent Document 1 discloses an invention relating to such a fitting lock, which includes a locking device 1 fixed to the inner surface of a door D, which is locked or unlocked by operating an operating part 11 to engage or disengage with a receiving part 13, an indicator member 2 whose tip end 21 protrudes from the outer surface side of the door D in response to the locking operation of the locking device 1, and a rod-shaped engaging member 3 juxtaposed to the indicator member 2, and further, the operating part 11 has an inclined surface 112a that can come into contact with the base end 32 of the engaging member 3. Note that the symbols in this paragraph are the symbols in Patent Document 1.

JP 2018-145731 A

However, in the fitting lock of Patent Document 1, as described in paragraph 0029 of the specification, "In the locked state shown in Figure 6, the inclined portion 33 of the engaging member 3 presses the inclined surface 112a of the operating base 112, so that the abutment point between the inclined portion 33 of the engaging member 3 and the inclined surface 112a of the operating base 112 moves from the lock base 12 side toward the operating frame 111 side, causing the operating portion 11 to move relative to the lock base 12, disengaging the operating portion 11 from the receiving portion 13, and the lock device 1 enters the unlocked state shown in Figure 5." In an emergency, the inclined portion 33 of the engaging member 3 abuts against the inclined surface 112a of the operating base 112 while moving the lock base 112 to unlock and open the door D, but there was an issue that the inclined portion 33 may not be able to slide smoothly against the inclined surface 112a due to changes in various components over time. Note that the symbols in this paragraph are those in Patent Document 1.

In view of the above problems, the present invention aims to provide a fitting lock that can be used on the doors of private rooms used in toilets, etc., and that can be smoothly unlocked and opened by someone operating it from outside without having to move the operating part or the like in a substantially horizontal direction in an emergency situation in which the door cannot be opened by the person in the private room due to poor health or other reasons, even if the door is locked and cannot be opened because the private room is in use.

[1] That is, the present invention relates to a lock base (1) having a pivot shaft (11) protruding from one surface (1A) and a through hole (12), a lock base (2) having a locking hole (21) communicating with the through hole (12) and supporting the pivot shaft (11), an operating part (3) that is movable in a substantially horizontal direction along the lock base (2) and has a notch (31) at either the lower or upper end of one end, and a locking part (3) that is capable of passing through the notch (31) and is a part of the operating part (3). This is a lock for fittings, characterized by having a receiving part (4) that is locked by engaging with the end side or unlocked by disengaging, and a locking piece (51) on one end that is inserted through the through hole (12) and the locking hole (21) and can be locked at the edge (22) of the locking hole (21) and can be released from the locking at the edge (22) of the locking hole (21) by rotating, and a connecting part (52) on the other end that can be connected to the tip of an external member (T).

[2] The fitting lock described in [1] above is characterized in that it is provided with an elastic member (6) that is located on the other surface (1B) of the lock seat (1) and biases the locking portion (5) in the opposite direction to the direction in which the pivot shaft (11) protrudes.

[3] The lock for fittings according to [1] or [2] is characterized in that the notch (31) is provided at the bottom of one end of the operating part (3), and the pivot shaft (11) supported by the lock base (2) is provided in a direction closer to the receiving part (4) than the center of gravity of the lock base (2) and the operating part (3), or the notch (31) is provided at the top of one end of the operating part (3), and the pivot shaft (11) supported by the lock base (2) is provided in a direction farther from the receiving part (4) than the center of gravity of the lock base (2) and the operating part (3).

[4] The fitting lock according to any one of [1] to [3] above is characterized in that it is provided with a cylindrical portion (7) that protrudes from the other surface (1B) of the lock seat portion (1) in the opposite direction to the direction in which the pivot shaft (11) protrudes and that contains the locking portion (5).

[5] A lock for building fixtures as described in any one of [1] to [4], characterized in that the approximately horizontal length of the cutout portion (31) is longer than the approximately horizontal length of the receiving portion (4).
It is.

[6] The fitting lock according to any one of [1] to [5], characterized in that the tip of the external member (T) is rod-shaped and the connecting part (52) has a fitting hole (521) that fits with the tip of the external member (R).

According to the present invention, when used for doors of private rooms used in restrooms, etc., even if the door cannot be opened because the private room is in use and locked, in an emergency situation where a person in the private room is unable to open the door themselves due to poor health or other reasons, it is possible for another person to operate the door from outside to smoothly unlock and open the door without having to move the operating part or the like in an approximately horizontal direction.

FIG. 2 is an exploded perspective view of the fixture lock of one embodiment of the present invention as viewed from outside the door. FIG. 2 is an exploded perspective view of the fixture lock of one embodiment of the present invention as viewed from inside the door. 1 is a perspective view showing a normal unlocked state of a door in accordance with one embodiment of the present invention, as viewed from outside the door. FIG. 1 is a perspective view showing a normal locked state and external members of a door lock according to one embodiment of the present invention, as viewed from outside the door. FIG. 1 is a perspective view showing the start of an emergency unlocking operation in an embodiment of the building fixture lock of the present invention, as viewed from outside the door. FIG. 1 is a perspective view showing an emergency unlocking operation in progress in a fitting lock according to one embodiment of the present invention, as viewed from outside the door. FIG. FIG. 2 is a perspective view showing an emergency unlocked state of the building fixture lock of one embodiment of the present invention as viewed from outside the door. 1 is a horizontal cross-sectional view showing the start of an emergency unlocking operation in a locked state of a fixture lock according to one embodiment of the present invention. FIG. 1 is a horizontal cross-sectional view showing an emergency unlocking operation in the middle of a locked state of a fixture lock according to one embodiment of the present invention. FIG. 1 is a horizontal cross-sectional view showing the end of an emergency unlocking operation in a locked state of a fixture lock according to one embodiment of the present invention. FIG. FIG. 2 is a horizontal cross-sectional view showing an emergency unlocked state in a locked state of the building fixture lock of one embodiment of the present invention. 1 is a partial cross-sectional view showing the relative positional relationship between the lock base 2 and the engaging portion 5 of a fixture lock according to one embodiment of the present invention. FIG.

The following is a detailed explanation of the embodiments of the fitting lock according to the present invention. Note that the embodiments described below are preferred examples of the present invention, and therefore various technical limitations are imposed on them. However, the present invention is not limited to these forms unless otherwise specified in the following explanation to limit the invention.

Figures 1 to 12 show the components of one embodiment of the fitting lock of the present invention, the assembled state, the normal locking and unlocking states, the series of states of the emergency unlocking operation, and the emergency unlocking state. In this embodiment, the fitting lock is composed of a lock seat 1, a lock base 2, an operating part 3, a receiving part 4, an engaging part 5, an elastic member 6, a cylindrical part 7, etc.

The lock base 1 is a member having a pivot 11 protruding from one surface, the front surface 1A, and a through hole 12. The lock base 1 is a plate-shaped member, and is fixed to the inside surface of the door D on the other surface, the back surface 1B, which is located opposite the front surface 1A. The inside surface of the door D is the inside side of the private room separated by the door D. In the present invention, the lock base 1 is fixed to the door D by two screws 14 through screw holes 13 drilled in the lock base 1, but in other embodiments, the lock base 1 may be fixed to the door D by an adhesive attached to the back surface 1B.

The pivot shaft 11 is a columnar or cylindrical member that protrudes approximately perpendicularly from the surface 1A of the lock base 1 and has a circular outer shape in a cross section perpendicular to the protruding direction. The pivot shaft 11 allows the lock base 2, which supports the pivot shaft 11, to rotate relative to the lock base 1. The pivot shaft 11 includes a pivot shaft body 11a, a first pivot shaft fixing portion 11b that is screwed onto one end of the pivot shaft 11 so as to sandwich the lock base 1 between the pivot shaft body 11a, and a second pivot shaft fixing portion 11c that is screwed onto the other end of the pivot shaft 11 so as to sandwich the lock base 2 between the pivot shaft body 11a. The pivot shaft body 11a, the first pivot shaft fixing portion 11b, and the second pivot shaft fixing portion 11c connect the lock base 1 and the lock base 2 so that the lock base 2 can rotate relative to the lock base 1. In this embodiment, the pivot shaft 11 is a separate component from the lock seat 1 and is attached to the lock seat 1 to form an integrated unit, but in other embodiments, it may be molded in advance to form an integrated unit with the lock seat 1.

Through hole 12 is a hole that penetrates front surface 1A and back surface 1B of lock seat 1. Through hole 12 is a hole that allows at least locking piece 51 of locking part 5 to be inserted, and in this embodiment, it is a long hole that is long in the longitudinal direction of lock seat 1, but it can be a round hole or a polygonal hole as long as locking piece 51 can be inserted. In this embodiment, through hole 12 is drilled at a position on lock seat 1 that is farther away from receiver 4 than pivot axis 11, or farther away from receiver 4, but in other embodiments, it may be drilled at a position closer to receiver 4 than pivot axis 11, or closer to receiver 4.

The lock base 2 has a locking hole 21 that communicates with the through hole 12, rotatably supports the pivot 11, and is a member to which the operating part 3 that is operated by the user can be attached. The lock base 2 is provided on the surface 1A side of the lock seat 1, and is connected to the lock seat 1 by the pivot 11. Under normal circumstances, the lock base 2 is restricted from rotating relative to the lock seat 1 by the locking part 5 that engages with the edge 22 that is the edge of the locking hole 21, but in an emergency, the edge 22 and the locking part 5 are released from the locking hole 21, allowing the locking part 5 to rotate relative to the lock seat 1.

The locking hole 21 is a hole drilled at a position that can communicate with the through hole 12 when the lock base 2 is supported by the lock seat 1, and has a shape that allows at least one end of the locking part 5 to be inserted through it. The edge part 22 is the edge of the locking hole 21, and is a part of the lock base 2 that can be engaged with one end of the locking part 5 inserted through the locking hole 21. In this embodiment, the locking hole 21 is a long hole that is long in the horizontal direction H, but it can be of various shapes such as a long hole that is long in other directions, a polygon such as a triangle or a square, or a star-shaped polygon, as long as one end of the locking part 5 can be inserted through it and engaged with the edge part 22.

The pivot hole 23 is a hole that is drilled in the lock base 2 and supports the pivot shaft 11. The pivot hole 23 is circular and aligned with the outer periphery of the pivot shaft 11, so it can rotate relative to the lock seat 1 via the pivot shaft 11.

The sliding restriction piece 24 is a generally cylindrical member that is biased toward the operating part 3 via a spring from a recess provided in the lock base 2, and can slide along a sliding groove 33 provided in the operating part 3 and move a predetermined distance in the horizontal direction H. The sliding restriction piece 24 restricts the operating part 3 to only be able to move within a range in which the sliding restriction piece 24 can fit into the sliding groove 33, preventing the operating part 3 from falling off the lock base 2.

The operating part 3 is a member that can move in a substantially horizontal direction along the lock base 2 and has a notch 31 at either the bottom or top of one end. The operating part 3 is a member that the user touches directly with his or her hand from inside the private room separated by the door D to operate it. The operating part 3 is substantially rectangular in shape, elongated in the horizontal direction H, and has an angular, substantially C-shaped cross section perpendicular to the longitudinal direction, and can engage with the receiving part 4 at the engagement part 32 that protrudes like a plate at the tip of the substantially C-shape. In normal use, the user slides the operating part 3 in the horizontal direction H relative to the lock base 2, and the engagement part 32 provided at the top or bottom of one end of the operating part 3 engages with the receiving part 4, thereby entering a locked state and preventing the door D from being opened from either the inside or the outside.

As described above, the notch 31 is provided at either the lower or upper part of one end of the operating unit 3. Therefore, even if the operating unit 3 is engaged with the receiving part 4 and thus in a locked state, in an emergency the receiving part 4 passes through the notch 31 and the operating unit 3 etc. rotates to unlock. In this embodiment, the notch 31 is provided at the lower part of one end of the operating unit 3 so as to be less noticeable to the user. It is preferable that the length of the notch 31 in the approximately horizontal direction is longer than the length of the receiving part 4 in the approximately horizontal direction. With such dimensions, even if the operating unit 3 is engaged with the receiving part 4 and thus in a locked state, the receiving part 4 passes through the notch 31 and the operating unit 3 etc. rotates to unlock, and the receiving part 4 can be covered and concealed by the operating unit 3 to ensure a locked state. In this embodiment, the notch 31 is provided in an L-shape at the bottom of the operating unit 3 so that it is open in the horizontal direction H at one end of the operating unit 3. In other embodiments, however, the notch 31 may be provided in a U-shape at the bottom of the operating unit 3 so that it is not open in the horizontal direction H, as long as the receiving portion 4 can pass through the notch 31.

The sliding groove 33 is provided on the inner surface of the operating part 3, facing the lock base 2, and is a recess extending in the longitudinal direction of the operating part 3 into which the sliding restriction piece 24 fits loosely. In this embodiment, the sliding groove 33 is provided as a long hole with a length of about one-quarter of the longitudinal direction of the operating part 3, and the sliding restriction piece 24 can only slide within this range. For this reason, the operating part 3 can move so as to be locked by engaging with the receiving part 4 or unlocked by engaging and disengaging, but is designed not to fall off the lock base 2.

The receiving part 4 is a member that can pass through the notch 31 and is locked by engaging with one end side of the operating part 3, or unlocked by disengaging. In this embodiment, the engaging part 32 of the operating part 3 is moved in the horizontal direction H and enters an engaging groove 41 provided on the outer peripheral side surface of the receiving part 4, thereby engaging the operating part 3 and the receiving part 4. In other embodiments, the receiving part 4 does not necessarily have to be provided with an engaging groove 41, and one surface of the receiving part 4 may be engaged with the engaging part 32 to enable locking. The receiving part 4 is attached to a wall W located on approximately the same plane as D by a fixing means such as a screw 42.

The positional relationship between the lock base 2 and the operation unit 3 is preferably as follows. That is, it is preferable that the notch 31 is provided at the bottom of one end of the operation unit 3, and the pivot shaft 11 supported by the lock base 2 is provided in a direction closer to the receiving unit 4 than the center of gravity of the lock base 2 and the operation unit 3. When the lock base 2 and the operation unit 3 are provided in such a positional relationship, the other end side of the operation unit 3 becomes heavy, and when the edge 22 and the locking unit 5 are released from the locking hole 21 and the lock base 2 and the operation unit 3 can be rotated relative to the lock seat 1, the lock base 2 and the operation unit 3 are automatically rotated relative to the lock seat 1 by gravity and unlocked, so that the door D can be opened from the outside of the private room. Alternatively, it is preferable that the notch 31 is provided at the top of one end of the operation unit 3, and the pivot shaft 11 supported by the lock base 2 is provided in a direction farther from the receiving unit 4 than the center of gravity of the lock base 2 and the operation unit 3. When the lock base 2 and operating unit 3 are positioned in this way, one end of the operating unit 3 becomes heavy, and similarly, the lock base 2 and operating unit 3 rotate automatically and reliably relative to the lock seat 1 due to gravity, unlocking the door D, allowing it to be opened from outside the private room.

The locking part 5 is a member having a part 1 at one end that can be inserted through the through hole 12 and the locking hole 21 and locked at the edge 22 of the locking hole 21, and can be released from the locking with the edge 22 of the locking hole 21 by rotating, and a connecting part 52 at the other end that can be connected to the tip of an external member T inserted from the outside of the door D. Under normal circumstances, the locking part 5 locks with the edge 22, which is the edge of the locking hole 21, thereby restricting the lock base 2 from rotating relative to the lock seat 1, and in an emergency, the locking with the edge 22 is released and the locking part 5 is removed from the locking hole 21, allowing the lock base 2 to rotate relative to the lock seat 1, and the door D can be opened from the outside of the private room even when it is locked.

The locking portion 5 is a generally rod-shaped member arranged generally parallel to the pivot shaft 11, with a generally T-shaped locking piece 51 at one end and a connecting portion 52 with a fitting hole 521 at the other end. In this embodiment, the locking portion 5 is formed from two members, the locking portion main body 5a and the connecting portion 52, but in other embodiments, the locking portion main body 5a and the connecting portion 52 may be integrally molded in advance. In this embodiment, the locking piece 51 is generally T-shaped, but it can be of various shapes, such as generally L-shaped, generally J-shaped, or star-shaped polygonal, as long as it can be engaged with and disengaged from the edge portion 22, which is the edge of the locking hole 21. The connecting part 52 is a part for connecting to the tip of an external member T such as a tool to rotate the locking part 5. In this embodiment, the connecting part 52 is provided with a hexagonal fitting hole 521 that can fit with the tip of the external member T, which is a tool such as a hexagonal wrench. In other embodiments, the connecting part 52 may be provided with a hole of another polygonal shape, or may be provided as various members such as a hook or magnet, as long as it can connect to the tip of the external member T to rotate the locking part 5.

The elastic member 6 is located on the back surface 1B side, which is the other surface of the lock seat 1, and is a member that biases the locking portion 5 in the opposite direction to the direction in which the pivot shaft 11 protrudes. The locking piece 51 is inserted into the through hole 12 and the locking hole 21 against the biasing force of the elastic member 6 during normal times when it is engaged with the edge portion 22, which is the edge of the locking hole 21, but in an emergency when it is released from the edge portion 22, it is released from the through hole 12 and the locking hole 21 by the biasing force of the elastic member 6, and the lock base 2 can rotate relative to the lock seat 1, so that the door D can be opened more quickly from the outside of the private room even in the locked state. In this way, the elastic member 6 allows the door D to be opened more quickly from the outside of the private room even in the locked state. In addition, although the elastic member 6 is a member that is preferably provided, it is not necessarily a member that must be provided because the above-mentioned locking portion 5 can be operated. In this embodiment, the elastic member 6 is a coil spring located inside the cylindrical portion 7, with one end abutting the back surface 1B of the lock seat 1 and the other end abutting the flange of the locking portion 5, and is provided to bias the locking portion 5 outward; however, in other embodiments, a leaf spring, torsion spring, or elastic rubber can also be used as long as it biases the locking portion 5 outward.

The cylindrical portion 7 is a member that protrudes from the back surface 1B, which is the other surface of the lock base 1, in the direction opposite to the direction in which the pivot shaft 11 protrudes, and contains the locking portion 5. The cylindrical portion 7 is composed of a hollow cylindrical portion main body 7a having a volume that contains the locking portion 5, and a cylindrical portion cover 7b that seals the other end of the cylindrical portion main body 7a. The inside of the cylindrical portion 7 protrudes from the back surface 1B of the lock base 1 so as to communicate with the through hole 12 and the locking hole 21. When the building lock of the present invention is installed on the door D, the cylindrical portion main body 7a is embedded so as to penetrate the inside of the door D, so that users cannot see the cylindrical portion main body 7a, and can only see the cylindrical portion cover 7b from the outer surface of the door D. The insertion hole 71 drilled near the center of the cylindrical portion cover 7b allows the external member T to be inserted from the outside of the door D in order to connect one end of the external member T to the connecting portion 52 of the locking portion 5 in an emergency. The cylindrical portion 7 integrates the lock seat 1, locking portion 5, and cylindrical portion 7 of the building lock of the present invention, making installation at the construction site easier. In addition, by providing only the cylindrical portion main body 7a and forming a hole corresponding to the insertion hole 71 on the outer surface of the door D, it is possible to make it possible to insert the external member T from the outside of the door D. Furthermore, although the cylindrical portion 7 is a member that is preferably provided, it is not necessarily a member that must be provided, since it can be substituted by providing a cylindrical hole recessed from the inner surface to the outer surface of the door D and forming a hole corresponding to the insertion hole 71 on the outer surface of the door D.

Next, we will explain how to use the building lock of the present invention.

First, the normal operation will be described. The state in Figure 3 shows the door in an unlocked state, so the door D can be opened from both the inside and outside. Then, by moving the operating part in the horizontal direction H along the lock base 2 from the state shown in Figure 3, the engaging part 32 provided at the top of one end of the operating part 3 engages with the engaging groove 41 of the receiving part 4, as shown in Figure 4, resulting in a locked state and door D being unable to be opened.

Next, the operation in an emergency will be described. First, as shown in Fig. 4, the tip of the external member T, which is a tool such as a hexagonal wrench, is inserted into the insertion hole 71 of the tubular portion 7. Then, as shown in Figs. 5 and 8, the tip of the external member T is fitted into the connecting portion 52 of the locking portion 5. Then, as shown in Figs. 6 and 9, when the external member T is rotated at an angle of 90 degrees, the locking piece 51 of the locking portion 5 also rotates at an angle of 90 degrees, and the locking piece 51 and the edge portion 22 are released from the locking piece 51. Then, as shown in Fig. 10, when the tip of the external member T is released from the connecting portion 52 of the locking portion 5, the locking portion 5 is released from the through hole 12 and the locking hole 21 by the biasing force of the elastic member 6. As a result, the only part connecting the lock seat 1 and the lock base 2 is the pivot 11, and furthermore, the pivot 11 supported by the lock base 2 is located closer to the receiver 4 than the center of gravity of the integrated lock base 2 and operating unit 3, making the other end of the operating unit 3 heavier. As a result, as shown in Figures 7 and 11, the receiver 4 passes through the notch 31, and the lock base 2 and operating unit 3 naturally rotate relative to the lock seat 1 to unlock. This allows the door D to be opened from outside the private room, making it possible to rescue the occupant of the private room, etc.

In addition, in FIG. 12, the state where the locking piece 51 of the locking portion 5 and the edge portion 22, which is the edge of the locking hole 21, are locked and unlocked are partially shown for easy understanding. In FIG. 12(a) and (a'), the state corresponds to the normal state of FIG. 3 and FIG. 4, and shows the state where the locking piece 51 and the edge portion 22 are locked. In FIG. 12(b) and (b'), the state corresponds to the emergency state of FIG. 6 and FIG. 9, and shows the state where the locking piece 51 and the edge portion 22 are unlocked. In FIG. 12(c) and (c'), the state corresponds to the emergency state of FIG. 10, and shows the state where the locking portion 5 is detached from the locking hole 21 after the locking piece 51 and the edge portion 22 are unlocked. In this way, in normal times, the locking piece 51 and the edge portion 22 are locked, but in emergency times, the locking piece 51 and the edge portion 22 are unlocked.

Therefore, with the building lock of the present invention, even if the private room to which it is attached is locked and the door cannot be opened because it is in use, in an emergency situation where the person in the private room is unable to open the door themselves due to poor health or other reasons, another person can smoothly unlock and open the door by simply rotating the door from outside using the external member T, without having to move the operating part or the like in an approximately horizontal direction.

1: Lock seat portion 11: Rotation shaft 12: Through hole 13: Screw hole 1A: Surface (first surface)
1B: Back side (other side)
2: Lock base 21: Locking hole 22: Edge 23: Rotation hole 24: Slide restriction piece 3: Operation part 31: Notch 32: Engagement part 33: Slide groove 4: Receiving part 41: Engagement groove 5: Locking part 51: Locking piece 52: Connection part 521: Fitting hole 6: Elastic member 7: Cylindrical part 71: Insertion hole T: Tool (external member)
D...Door W...Wall H...Horizontal direction

Claims (6)

A lock base portion (1) having a pivot shaft (11) protruding from one surface (1A) and a through hole (12);
a lock base (2) having a locking hole (21) communicating with the through hole (12) and supporting the pivot shaft (11);
an operating part (3) that is movable in a substantially horizontal direction along the lock base (2) and has a notch (31) at either the lower or upper end of one end;
a receiving portion (4) that can pass through the notch portion (31) and that is locked by engaging with one end side of the operating portion (3) or unlocked by engaging and disengaging with the one end side of the operating portion (3);
a locking portion (5) having a locking piece (51) at one end that is inserted through the through hole (12) and the locking hole (21) and can be locked at the edge portion (22) of the locking hole (21) and can be released from the locking with the edge portion (22) of the locking hole (21) by rotating, and a connecting portion (52) at the other end that can be connected to the tip of an external member (T);
A lock for building fixtures, comprising: The fixture lock according to claim 1, characterized in that it is provided with an elastic member (6) located on the other surface (1B) of the lock seat portion (1) and biasing the engagement portion (5) in the direction opposite to the direction in which the pivot shaft (11) protrudes. The lock for fittings according to claim 1 or 2, characterized in that the notch (31) is provided at the bottom of one end of the operating part (3), and the pivot shaft (11) supported by the lock base (2) is provided in a direction closer to the receiving part (4) than the center of gravity of the lock base (2) and the operating part (3), or the notch (31) is provided at the top of one end of the operating part (3), and the pivot shaft (11) supported by the lock base (2) is provided in a direction farther from the receiving part (4) than the center of gravity of the lock base (2) and the operating part (3). A fitting lock as described in any one of claims 1 to 3, characterized in that it has a tubular portion (7) that protrudes from another surface (1B) of the lock seat portion (1) in the opposite direction to the direction in which the pivot shaft (11) protrudes, and that contains the engaging portion (5). A lock for fittings according to any one of claims 1 to 4, characterized in that the approximately horizontal length of the notch (31) is longer than the approximately horizontal length of the receiving portion (4). A lock for fittings according to any one of claims 1 to 5, characterized in that the tip of the external member (T) is rod-shaped, and the connecting part (52) is provided with a fitting hole (521) that fits with the tip of the external member (R).

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