Locking parts

Abstract

To provide a locking member capable of suppressing the occurrence of a problem caused by the unintended protrusion of a locking bolt.SOLUTION: A locking member, which has a locking case and a locking bolt 11 and in which a part of the locking bolt 11 moves in and out with respect to the locking case, shall have a protrusion restricting member 85. The protrusion restricting member 85 shall be arranged in the protrusion restricting position to be in a restricted state where the protrusion of the lock bolt 11 is restricted by the protrusion restricting member 85, and the protrusion restricting member 85 shall be arranged in the non-restricted position to be in a non-restricted state where the protrusion of the lock bolt 11 is not restricted by the protrusion restricting member 85. The protrusion restricting member 85 shall move from the non-restricting position to the protrusion restricting position by centrifugal force when the door moves.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a lock member, and more particularly to a lock member that can be suitably employed in a magnetic latch structure that moves a latch by magnetic force. [Background technology]

[0002] A widely known magnetic latch structure has a latch lock attached to the door and a latch receiver attached to the door frame, and when the door is moved from an open to a closed state and the latch lock approaches the latch receiver, the latch (latch bolt) protrudes from the lock case of the latch lock due to magnetic force. In this type of magnetic latch structure, a permanent magnet is installed on either the latch lock side or the latch receiver side. For example, if a permanent magnet is installed on the latch receiver side, when the door approaches the latch receiver, the latch is attracted by magnetic force and protrudes, locking (idle locking). In other words, a permanent magnet is installed on either the latch lock side or the latch receiver side, and a part that is attracted to this permanent magnet is installed on the other side, so the latch is operated by magnetic force. An example of such a magnetic latch structure (magnetic latch) is the magnetic latch lock disclosed in Patent Document 1.

[0003] In the magnetic latch lock of Patent Document 1, as the door is closed, the latch bolt protrudes from the lock box, and part of the latch bolt enters the housing through an opening formed in the housing on the strike side (latch receiving side), thereby locking the door. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 08-13884 Summary of the Invention [Problem to be solved by the invention]

[0005] When a door is slammed shut with a conventional magnetic latch, it can bounce off the door by hitting a doorstop or other obstacle. This means that the door can move quickly in the closing direction, reach the position where it should be when closed, and then immediately move quickly in the opening direction.

[0006] In such cases, conventional magnetic latch structures can cause the latch to protrude in an unexpected location. For example, the strike (latch receiver) has a hole (hereinafter also referred to as a "receiving hole") into which the latch is received when the door is closed. However, the latch may protrude upstream of the receiving hole in the door closing direction. In this case, the latch may come into contact with a component such as the metal plate (decorative panel) of the strike, resulting in an unintended loud noise.

[0007] Therefore, an object of the present invention is to provide a locking member that can prevent problems caused by unintended protrusion of the locking bolt. [Means for solving the problem]

[0008] One aspect of the present invention to solve the above problem is a lock element that is attached to a door and has a lock case and a lock bolt, with a portion of the lock bolt extending and retracting relative to the lock case, and has a protrusion restriction member, and when the protrusion restriction member is arranged in a protrusion restriction position, the lock element is in a restricted state where the protrusion of the lock bolt is restricted by the protrusion restriction member, and when the protrusion restriction member is arranged in a non-restriction position, the lock element is in a non-restriction state where the protrusion restriction member does not restrict the protrusion of the lock bolt, and the protrusion restriction member moves from the non-restriction position to the protrusion restriction position due to the centrifugal force when the door moves. The protrusion restricting member moves downward by its own weight, thereby moving from the protrusion restricting position to the non-restricting position, and transitioning from the restricting state to the non-restricting state. The lock member is characterized by the following:

[0009] With this locking device, when the door is slammed shut, the centrifugal force moves the protrusion-restricting member, which restricts the protrusion of the lock bolt. In other words, even if the door is slammed shut, the lock bolt will not protrude in an unintended position, thereby preventing problems caused by the unintended protrusion of the lock bolt. Furthermore, the locking element of this aspect has a simple structure that can be manufactured inexpensively without using a sensor or the like to detect the closing speed of the door, and can prevent problems caused by unintentional protrusion of the locking bolt.

[0010] In the above aspect, the protrusion restricting member moves downward due to its own weight, thereby moving from the protrusion restricting position to the non-restricting position, and transitioning from the restricting state to the non-restricting state. do.

[0011] According to this aspect, automatic transition from a restricted state to a non-restricted state is possible with a simple structure.

[0012] Another aspect of the present invention The situation is as follows: This locking element is attached to a door and has a lock case and a lock bolt, with a portion of the lock bolt extending and retracting relative to the lock case. It also has a protrusion-restricting member, which, when positioned in a protrusion-restricting position, enters a restricted state in which the protrusion of the lock bolt is restricted by the protrusion-restricting member, and, when positioned in a non-restricting position, enters a non-restricting state in which the protrusion-restricting member does not restrict the protrusion of the lock bolt. The protrusion-restricting member moves from the non-restricting position to the protrusion-restricting position due to the centrifugal force when the door moves. When the centrifugal force generated when the door moves is equal to or greater than a certain value, the protrusion restricting member moves upward against gravity and moves from the non-restricting position to the protrusion restricting position. The lock member is characterized by the following.

[0013] According to this aspect, the protrusion of the lock bolt is restricted only when the door is closed with a force equal to or greater than a certain level, thereby enabling more appropriate restriction of the protrusion of the lock bolt.

[0014] Another aspect of the present invention The situation is as follows: This locking element is attached to a door and has a lock case and a lock bolt, with a portion of the lock bolt extending and retracting relative to the lock case. It also has a protrusion-restricting member, which, when positioned in a protrusion-restricting position, enters a restricted state in which the protrusion of the lock bolt is restricted by the protrusion-restricting member, and, when positioned in a non-restricting position, enters a non-restricting state in which the protrusion-restricting member does not restrict the protrusion of the lock bolt. The protrusion-restricting member moves from the non-restricting position to the protrusion-restricting position due to the centrifugal force when the door moves. The lock bolt has a bolt groove portion, and the lock case or another member housed in the lock case is provided with a case groove portion, and when the lock bolt is retracted, the bolt groove portion and the case groove portion form a continuous connecting groove, and the protrusion restriction position includes a position that is a boundary between the bolt groove portion and the case groove portion within the connecting groove. The lock member is characterized by the following.

[0015] According to this aspect, the protrusion of the lock bolt can be appropriately restricted with a simple structure.

[0016] The preferred aspect described above is that the protrusion regulating member is a sphere, the connecting groove is a groove with at least a portion extending upward, and when the protrusion regulating member moves from the protrusion regulating position to the non-regulating position, it is more preferable that the protrusion regulating member moves along the connecting groove with at least a portion positioned within the connecting groove. It should be noted that the "sphere" referred to here does not necessarily have to be a perfect sphere, but rather it may have a spherical shape that allows it to move smoothly while engaging with the connecting groove, and for example, it may be acceptable for it to have minute irregularities on the surface.

[0017] According to this aspect, it is possible to smoothly transition from a restricted state to a non-restricted state. [Effects of the Invention]

[0018] According to the present invention, a locking member can be provided that can prevent problems caused by unintentional protrusion of the locking bolt. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is an exploded perspective view showing a state in which a latch lock according to an embodiment of the present invention is attached to a door. FIG. [Figure 2] 2 is a perspective view showing the latch lock of FIG. 1, showing a state in which the cover member has been removed from the case body of the lock case. FIG. [Figure 3] 3 is a front view showing the case body and the members housed in the case body of FIG. 2, with the restricting member in a non-restricting position, and is a partially enlarged view. FIG. [Figure 4] FIG. 4 is a perspective view showing the case body of FIG. 3. [Figure 5] FIG. 5 is a front view showing the case main body of FIG. [Figure 6] 4A to 4C are diagrams showing the latch bolt of FIG. 3, in which (a) is a perspective view, (b) is a front view, and (c) is a plan view. [Figure 7]This is an explanatory diagram showing how the regulating member moves when the door equipped with the latch lock in Figure 1 is slammed shut. The upper diagram shows the door equipped with the latch lock, and the lower diagram shows the area around the regulating member inside the latch lock. The door and regulating member move in the order of (a) to (c). [Figure 8] 3 is a front view showing the case body and the members housed in the case body of FIG. 2, with the regulating member placed in the regulating position, with a portion enlarged. FIG. [Figure 9] FIG. 2 is a front view showing a latch lock according to an embodiment different from that shown in FIG. 1, showing a state in which the lid body is removed from the case body. [Figure 10] 10 is an explanatory view schematically showing the case body and latch bolt of FIG. 9 cut along the AA plane. FIG. [Figure 11] 10A to 10C are explanatory views showing how the regulating member moves when the door to which the latch lock shown in FIG. 9 is attached is slammed shut, and the regulating member moves in the order of (a) to (c). DETAILED DESCRIPTION OF THE INVENTION

[0020] The latch lock 1 (lock member) according to an embodiment of the present invention will be described in detail below with reference to the drawings, but the present invention is not limited to these examples. Furthermore, the front-rear, up-down, and left-right directions will be described based on the state shown in Figure 3. That is, the width direction of the latch lock 1 is the front-rear direction, and the protruding direction of the latch bolt 11 is the direction toward the left in the left-right direction.

[0021] As shown in FIG. 1, the latch lock 1 of this embodiment is attached to a door 2 (a door member, a door) when in use.

[0022] The door 2 has a mounting hole 2a in which the latch lock 1 is housed. This mounting hole 2a has an opening on the end surface of the door 2 and is a hole recessed in a direction perpendicular to the thickness direction. The door 2 also has a handle attachment hole 2b and an operating piece attachment hole 2c on one side and the other side in the thickness direction, respectively (the other side is not shown). Both of these have openings on the main surface of the door, and are holes that communicate with the outside and the inside of the attachment hole 2a.

[0023] When attaching the latch lock 1, the latch lock 1 is inserted into the attachment hole 2a formed in the door 2, and the latch lock 1 is fixed to the door 2 with a fastening element such as a screw. The term "fastening element" as used herein is a broader concept than screws, nails, bolts, pins, etc., and is a mechanical component that can be fastened and released without, in principle, destroying the fastened object.

[0024] Then, a pair of handles 200, 201 are attached to both sides in the thickness direction of the door 2. At this time, a handle shaft 202 (square core in this embodiment) connecting the pair of handles 200, 201 is engaged with a hub member 12 of the latch lock 1 (described in detail later). More specifically, with the latch lock 1 housed in the mounting hole 2a, the handle shaft 202 is inserted into the handle mounting hole 2b. As a result, the handle shaft 202 extends from the outside of one main surface in the thickness direction of the door 2, through the inside of the mounting hole 2a, and to the outside of the other main surface in the thickness direction of the door 2. Then, a portion of the handle shaft 202 is inserted into the handle insertion hole 75 of the hub member 12 inside the mounting hole 2a. Therefore, when the handles 200, 201 are operated, the hub member 12 moves.

[0025] Furthermore, a pair of operation piece members 210, 211 are attached to both sides in the thickness direction of the door 2. At this time, a part of the operation piece members 210, 211 is inserted from the operation piece attachment hole 2c into the attachment hole 2a and engaged with the locking member 15. As a result, when the operation piece members 210, 211 are operated, the locking member 15 is actuated.

[0026] The latch lock 1 of this embodiment forms a magnetic latch together with a latch receiving member (strike) not shown. That is, a magnetic member is provided on one of the latch lock 1 and the latch receiving member (the latch receiving member in this embodiment), and when the latch lock 1 and the latch receiving member approach each other, for example, when the door 2 transitions from an open state to a closed state, the latch bolt 11 moves (protrudes) due to magnetic force. Note that, although a permanent magnet is provided on the latch receiving member in this embodiment, the latch bolt 11 may also have a structure having a permanent magnet.

[0027] 2 and 3, the latch lock 1 accommodates a latch bolt 11 (lock bolt), a hub member 12, a first biasing member 13, a second biasing member 14, and a locking member 15 inside a lock case 10. The latch lock 1 also has a decorative plate member 16.

[0028] As shown in FIG. 2, the lock case 10 has a case body 20 and a cover member 21. As shown in Figures 4 and 5, case body 20 has an upper wall 30, a lower wall 31, a left side wall 32, a right side wall 33, and a bottom wall forming portion 34, and is a box-shaped member with one side in the width direction of lock case 10, which is the front, open. That is, case body 20 has wall portions that separate five of its six sides, and has a structure in which the remaining side is open. Case body 20 also has a storage space 35 surrounded by the wall portions (upper wall 30, lower wall 31, left side wall 32, right side wall 33, and bottom wall forming portion 34) that separate the five sides.

[0029] The upper wall 30 and the lower wall 31 are wall portions that separate the upper and lower sections of the case main body 20, and form the top and bottom surfaces, respectively. That is, the upper wall 30 also forms the top surface, and the lower wall 31 also forms the bottom surface. The left side wall 32 forms the side portion located outermost when the lock case 10 is attached to the door 2. In other words, it is also the outer side portion that forms the outer side. The right side wall 33 forms the side portion located innermost when the lock case 10 is attached to the door 2. In other words, it is also the inner side portion that forms the inner side. The left side wall 32 and the right side wall 33 face each other and are spaced apart in the left-right direction (the direction in which the latch bolt 11 moves), and the left side wall 32 is longer in the up-down direction than the right side wall 33.

[0030] 4, the left side wall 32 has a portion located above the right side wall 33 and the upper wall 30, and a portion located below the right side wall 33 and the lower wall 31. Each of these portions has an attachment hole 32a. The attachment hole 32a is a hole that penetrates the left side wall 32 in the thickness direction. This left side wall portion 32 functions as a fixing member when fixing the latch lock 1 to the door 2 (see FIG. 1). That is, the two mounting holes 32a are holes through which fastening elements are inserted when the latch lock 1 is in contact with the door 2 (see FIG. 1). Furthermore, a latch insertion hole 32b that communicates with the outside and the storage space 35 is formed in the left side wall 32. Specifically, the left side wall 32 has a protruding portion 32c that is a protruding portion that protrudes outward from the outer main surface (left main surface) and continues in an annular (quadratic annular) shape. The latch insertion hole 32b is formed by connecting the inside of this protruding portion 32c to a through hole formed in the main body of the left side wall 32. This latch insertion hole 32b is a hole through which a part of the latch bolt 11 passes when the latch bolt 11 advances or retreats.

[0031] The bottom wall forming portion 34 is a wall portion that forms the bottom portion of the storage space 35, and forms a side portion that faces the lid member 21 when the case main body 20 and the lid member 21 are attached (see Figure 1, etc.). In other words, the lid member 21 is also a widthwise one-side side portion that forms a side portion on one side in the width direction of the lock case 10, and the bottom wall forming portion 34 is also a widthwise other-side side portion that forms a side portion on the other side.

[0032] As shown in FIGS. 4 and 5, the case body 20 of this embodiment has a first massive portion 45, a second massive portion 46, and a standing wall portion 47 within the accommodation space 35. The first massive portion 45 and the second massive portion 46 are both generally rectangular parallelepiped portions, and although not shown in detail, are appropriately hollowed out.

[0033] The first massive portion 45 is formed integrally with the upper wall portion 30, the left side wall portion 32, and the bottom wall forming portion 34, and also functions as a rib portion (reinforcing portion) for improving the strength of the case main body portion 20. The second massive portion 46 is formed integrally with the lower wall portion 31, the left side wall portion 32, and the bottom wall forming portion 34, and also functions as a rib portion (reinforcing portion) for improving the strength of the case main body portion 20.

[0034] The first massive portion 45 and the second massive portion 46 are provided at positions spaced apart in the vertical direction. As shown in Figure 3 and other figures, a portion of the latch bolt 11 is disposed between the first massive portion 45 and the second massive portion 46. Therefore, when the latch bolt 11 moves forward or backward, a portion of the latch bolt 11 moves between the first massive portion 45 and the second massive portion 46.

[0035] Here, a case side groove portion 50 is formed in the lower portion of the first massive portion 45 . In detail, the case groove 50 is a groove recessed upward from the lower surface (bottom surface) of the first massive portion 45, and in this embodiment, has a substantially semicircular shape when viewed from the front and extends in the front-to-rear direction. In other words, the case groove 50 in this embodiment is a short groove, or can also be said to be a recessed portion.

[0036] The standing wall portion 47 has a generally rectangular plate-like portion that protrudes forward from the bottom wall forming portion 34. As shown in FIG. 3 and other figures, the standing wall portion 47 is a portion against which one end of the second biasing member 14 abuts.

[0037] As shown in Figure 6, the latch bolt 11 has a tip side portion 60 located on the tip side (left side) in the protruding direction, and a base side portion 61 located on the base side (right side), which are formed integrally.

[0038] The tip side portion 60 has a tip side portion main body 60 a that has a substantially rectangular parallelepiped outer shape and extends in the left-right direction, an upper protrusion 65 , and a lower protrusion 66 . The upper protrusion 65 is formed on the upper portion of the base end side of the tip side body 60a and is a generally rectangular parallelepiped portion that protrudes upward. Therefore, in the tip side portion 60, the top surface of the tip side and the top surface of the base end are continuous with each other via a step, and the top surface of the base end is located higher than the top surface of the tip side. In addition, in the tip side portion 60, the base end portion is longer in the vertical direction than the tip side.

[0039] The lower protrusions 66 are formed on the lower part of the base end side of the tip side body 60a, and are approximately rectangular parallelepiped protrusions that protrude downward, and are formed one at a time at positions spaced apart in the front-to-back direction (width direction of the latch bolt 11) (one side is not shown).

[0040] The base end portion 61 has a base end portion main body 61 a and a base end side engagement portion 67 . The base end side body 61a is a portion that is formed to be thinner (shorter in the width direction of the latch bolt) than the tip end side portion 60, and is a roughly rectangular parallelepiped that extends in the left-right direction. Note that a portion of the base end side is shorter in the up-down direction than the tip end side. The base-side engaging portion 67 is formed around the base-side end (around the right end) of the base-side portion main body 61a and has protruding portions that protrude in both the front and rear directions. This base-side engaging portion 67 is the portion that engages with the hub member 12 (see FIG. 3, etc.).

[0041] Furthermore, as shown in FIG. 6(a) and the like, the latch bolt 11 of this embodiment is provided with a spring arrangement portion 70 and a bolt side groove portion 71 (restriction member arrangement portion).

[0042] The spring arrangement portion 70 is provided at the base end portion of the tip side portion 60, and is a through-hole with an opening shape that is substantially horizontally elongated and that penetrates the latch bolt 11 in the front-to-rear direction. As shown in Figure 3 and other figures, this spring arrangement portion 70 is the portion where the standing wall portion 47 and the second biasing member 14 are arranged. In other words, the latch bolt 11 has a biasing member arrangement portion in which a biasing member is arranged. In this embodiment, a part of the inner circumferential surface of the spring placement portion 70 is formed by the left end surface (the surface on the tip side) of the base end side portion 61.

[0043] The bolt groove 71 is located above the spring placement section 70 and is a groove formed across the tip side body 60a and the upper protrusion 65, with openings at the front and top. It is also a recessed portion extending from the front end of the latch bolt 11 toward the rear. 6(b), the bolt groove portion 71 has a rounded right end in a front view. In other words, in a plan view with the line of sight intersecting (perpendicular to) the protruding direction of the latch bolt 11, the portion on the base end side in the protruding direction of the latch bolt 11 has a rounded shape.

[0044] The bolt groove portion 71 becomes a groove portion that gradually extends upward as it moves toward the left side (the tip side in the protruding direction of the latch bolt 11) in the front view. In other words, it extends in a direction that has a component in the direction along the protruding direction of the latch bolt 11 (left-right direction) and a component in the direction intersecting the protruding direction of the latch bolt 11 (up-down direction). In this front view, the bolt groove 71 has a substantially hemispherical base end hemispherical portion 71a located on the right side and a tip end extension portion 71b located on the left side that extends while curving upward and to the left. The tip end extension portion 71b extends while describing an arc-shaped trajectory. Therefore, the inner surface of the bolt groove 71 has a curved surface 73 on the lower left side that gradually curves upward toward the left. Also, the upper opening of the bolt groove 71 is a substantially rectangular opening, as shown in Figure 6(c).

[0045] 1, 3, etc., the hub member 12 is a member that converts the rotational force received from the handles 200, 201 into a driving force for extending and retracting (extending and retracting) the latch bolt 11. In other words, it functions as a power transmission member that transmits the power from the handles 200, 201 to the latch bolt 11. In other words, when the door 2 is in the closed state and the movement of the latch bolt 11 is not restricted by the locking member 15, when the hub member 12 operates, the latch bolt 11 extends and retracts.

[0046] As shown in FIG. 3, the hub member 12 has a hub main body portion 12a, a hub side engaging portion 12b, and a hub side receiving portion 12c. The hub main body 12a is a generally cylindrical portion, and has a handle insertion hole 75 at the center thereof. The hub-side engagement portion 12b has two arms 76 (one of which is not shown) that can engage with the latch bolt 11. These two arms 76 are protruding pieces that protrude from the hub main body 12a in a direction away from the handle insertion hole 75, and are spaced apart in the front-to-rear direction. That is, when a part of the latch bolt 11 (the base end portion 61) is inserted between the two arms 76, the hub member 12 and the latch bolt 11 engage with each other. The hub-side receiving portion 12c has an upwardly recessed groove (not shown) capable of accommodating one longitudinal end of the first biasing member 13, and a pressed plate portion 77 located on the right side. This pressed plate portion 77 comes into contact with the end of the first biasing member 13 and is pressed rightward by the first biasing member 13.

[0047] 3, the first biasing member 13 is a member that constantly biases the hub member 12 (pressed plate portion 77) to the right, and in this embodiment, a coil spring is used. The first biasing member 13 is disposed with one longitudinal end in contact with the second massive portion 46 and the other end in contact with the hub member 12 (pressed plate portion 77).

[0048] 3, the second biasing member 14 is a member that constantly biases the latch bolt 11 to the right (retraction direction), and in this embodiment, a coil spring is used. The second biasing member 14 is disposed with one longitudinal end in contact with the standing wall portion 47 and the other end in contact with the latch bolt 11.

[0049] As shown in FIG. 3, the locking member 15 has a position maintaining member 15a, a key receiving member 15b, and an intervening member 15c.

[0050] The position maintaining member 15a is a member that maintains the position of the key receiving member 15b in a fixed position, and in this embodiment, a torsion spring is used.

[0051] The key receiving member 15b has an operation piece insertion hole 80 into which a portion of the operation piece members 210, 211 (see FIG. 1) is inserted. That is, when a portion of the operation piece members 210, 211 is inserted into the operation piece insertion hole 80, the operation piece members 210, 211 and the key receiving member 15b are engaged with each other. When the user operates the operation piece members 210, 211 in this state, a rotational force is transmitted to the intervening member 15c as the operation piece members 210, 211 rotate. That is, the key receiving member 15b is a member that converts the rotational force received from the operation piece members 210, 211 into a driving force for the intervening member 15c.

[0052] That is, when the operation piece members 210, 211 are operated while the latch bolt 11 is in the protruding state, the intervening member 15c moves downward. Then, the intervening member 15c enters between the right end portion (the end in the retracting direction) of the latch bolt 11 and the right side wall portion 33 of the lock case 10, thereby establishing a locked state in which the latch bolt 11 cannot be retracted. In other words, the latch bolt 11 of this embodiment also functions as a deadbolt when the operation piece members 210, 211 are operated (the locking member 15 operates). In other words, the bolt member (lock bolt) of this embodiment has the function of a deadbolt in addition to the function of a latch bolt.

[0053] As shown in FIG. 1, the decorative plate member 16 is a thin metal plate member having an outer shape of a vertically long, approximately rectangular plate. The decorative plate member 16 has two mounting holes 16a and a latch-passing hole 16b, both of which are through-holes that penetrate the decorative plate member 16 in the thickness direction. As shown in Figures 1 and 2, this decorative plate member 16 is arranged overlapping the left side wall portion 32 of the latch lock 1 so that the thickness direction is the same (left-right direction). At this time, the two mounting holes 16a overlap with the two mounting holes 32a of the left side wall portion 32, respectively, to form communicating holes through which fastening elements are inserted. In other words, they form holes through which fastening elements are inserted when fixing the latch lock 1 to the door 2. Meanwhile, the protrusion 32c of the left side wall portion 32 described above is fitted into the latch passage hole 16b. A portion of the latch insertion hole 32b of the left side wall portion 32 is positioned inside the latch passage hole 16b of the decorative plate member 16, and a portion of the latch bolt 11 passes inside these holes when the latch bolt 11 moves forward or backward.

[0054] As shown in FIG. 3, the latch lock 1 of this embodiment has a restricting member 85 (protrusion restricting member) as a characteristic structure. The restricting member 85 of this embodiment is a resin sphere, and is arranged in a freely movable state inside the bolt groove portion 71. In other words, when arranged inside the bolt groove portion 71, the restricting member 85 has a size that allows it to move inside the bolt groove portion 71.

[0055] Next, we will explain in detail the operation of the regulating member 85 when the latch bolt 11 of the latch lock 1 of this embodiment is retracted and the door 2 to which this latch lock 1 is attached is closed forcefully at a speed greater than a certain level.

[0056] In the latch lock 1 of this embodiment, when the latch bolt 11 is in a retracted state, as shown in Figure 3, the bolt side groove portion 71 of the latch bolt 11 and the case side groove portion 50 of the lock case 10 (first mass portion 45) form a continuous connecting groove 87. When the latch bolt 11 is in a protruding state, the upper opening of the bolt groove portion 71 and the lower opening of the case groove portion 50 are misaligned in the left-right direction (not shown), and the bolt groove portion 71 and the case groove portion 50 are not continuous. In other words, the connecting groove 87 is not formed when the latch bolt 11 is in a protruding state, but is formed when the latch bolt 11 is in a retracted state.

[0057] The connecting groove 87 has rounded longitudinal ends in a front view. The connecting groove 87 is a groove that extends while curving, and extends upward toward the right.

[0058] 3 and 7(a), when the door 2 is not moving, the restricting member 85 is disposed in a position below the connecting groove 87 due to its own weight. In this embodiment, the position where the restricting member 85 is disposed (hereinafter also referred to as the non-restricting position) is a position around one end of the connecting groove 87 in the extension direction (longitudinal direction), and is a position around the end of the connecting groove 87 on the latch bolt 11 side. In addition, the non-restricting position in this embodiment is also the lowest position within the movable range of the restricting member 85 within the connecting groove 87. When the restricting member 85 is placed in the non-restricting position, a part of the restricting member 85 is inserted into a rounded portion formed on one end side of the connecting groove 87 .

[0059] By disposing the restricting member 85 in the non-restricting position, the entire restricting member 85 is located inside the latch bolt 11, and the restricting member 85 does not interfere with the movement of the latch bolt 11 (hereinafter also referred to as the non-restricting state). In other words, this is a state in which the restricting member 85 does not interfere with the protruding and retracting movements of the latch bolt 11.

[0060] When the door 2 moves vigorously from the state in which the restricting member 85 is disposed in the non-restricting position, the latch lock 1 attached integrally to the door 2 also moves in conjunction with the rotation of the door 2. As a result, the restricting member 85 moves upward against its own weight due to centrifugal force, as shown in Figures 7(b) and 7(c). Specifically, inside the connecting groove 87, the restricting member 85 moves leftward and upward along the longitudinal direction of the connecting groove 87. 7(c) and 8, the regulating member 85 is disposed at a position above the connecting groove 87. In this embodiment, the position at which the regulating member 85 is disposed (hereinafter also referred to as the regulating position) is a position around the other end of the connecting groove 87 in the extension direction (longitudinal direction), that is, a position around the upper end of the connecting groove 87 (around the end on the first massive portion 45 side).

[0061] When the restricting member 85 is arranged in the restricting position, a part of the restricting member 85 is arranged inside the bolt groove portion 71, and another part is arranged inside the case groove portion 50. In other words, the restricting position is the position that is the boundary between the bolt groove portion 71 and the case groove portion 50 and its surrounding positions, and is a position that includes the position that is the boundary between the bolt groove portion 71 and the case groove portion 50. In other words, when the restricting member 85 is disposed in the restricting position, a portion of the restricting member 85 is located inside the latch bolt 11, and another portion of the restricting member 85 protrudes to the outside from the latch bolt 11. The portion protruding to the outside from the latch bolt 11 engages with the case side groove 50 formed in the case main body 20.

[0062] When the restricting member 85 is placed in the restricting position, the restricting member 85 enters a state (restricted state) in which it restricts the movement (protruding operation) of the latch bolt 11. 8, when the latch bolt 11 attempts to protrude (move leftward) with the restricting member 85 in the restricted position, a portion of the latch bolt 11 abuts against the restricting member 85 from the right side. At this time, the restricting member 85 is pressed leftward by the latch bolt 11, but the upper portion of the restricting member 85 abuts against the inner surface of the case groove 50 from the right side, preventing movement to the left. In other words, the restricting member 85 is caught in the case groove 50, preventing the restricting member 85 and the latch bolt 11 from moving leftward.

[0063] When the movement speed of the door 2 slows down or the movement of the door 2 stops while the regulating member 85 is in the regulating position, the regulating member 85 moves downward due to its own weight. That is, when the centrifugal force acting on the regulating member 85 due to the rotation of the door 2 becomes less than a certain value or disappears, the regulating member 85 moves downward and to the right inside the connecting groove 87 along the longitudinal direction of the connecting groove 87. That is, the regulating member 85 moves in the opposite direction to the upward movement described above. In this embodiment, the connecting groove 87 has the curved surface portion 73 and the restricting member 85 is spherical, so that the restricting member 85 moves smoothly downward. Furthermore, according to this embodiment, the door 2 automatically transitions from the restricted state to the non-restricted state when the moving speed of the door 2 drops below a certain level, without providing a complex mechanism.

[0064] As described above, the latch lock 1 of this embodiment has a characteristic configuration in which the movement of the latch bolt 11 is restricted by the restricting member 85. This movement restricting mechanism is provided separately from the mechanism for restricting the movement of the latch bolt 11 that is performed manually by a person (the movement restriction by the locking member 15 described above), and is a mechanism that automatically switches between a restricted state and a non-restricted state.

[0065] In the latch lock 1 described above, the shape of the groove, such as the length of the connecting groove 87 and the curvature of the curved, extending portion, can be changed as needed. This allows for the movement speed of the door 2 that enters the restricted state, i.e., the force with which the door 2 must be closed before the movement of the latch bolt 11 is restricted by the restricting member 85, to be changed as needed. In other words, it is possible to prevent the restricting member 85 from moving to the restricted position unless a greater centrifugal force is applied, or conversely, to allow the restricting member 85 to move to the restricted position even with a smaller centrifugal force.

[0066] In the above embodiment, the lock bolt has both the function of a latch bolt and the function of a deadbolt, but the present invention is not limited to this. The lock bolt of the present invention may be a latch bolt that does not have the function of a deadbolt.

[0067] In the above embodiment, an example was described in which the first massive portion 45 is part of the case main body portion 20 and is formed integrally with the wall portions of the case main body portion 20 (upper wall portion 30, left side wall portion 32, bottom wall forming portion 34), but the present invention is not limited to this. For example, the member (massive portion) in which the case groove is formed may be formed separately from the case main body and fixed integrally to the case main body with a fastening element such as a screw. In other words, the member in which the case groove is formed may be a member housed in the case main body, but a member different from the case main body and the lock bolt (a separate member). When the lock bolt is in the retracted position, a connection is formed between the groove formed in the lock bolt and the groove formed in the lock case or a member housed in the lock case.

[0068] Next, a latch lock 301 (lock member) according to an embodiment different from the above-described embodiment will be described. In the following description, the same parts as those described above will be given the same reference numerals, and duplicated descriptions will be omitted.

[0069] As shown in Figs. 9 and 10, the latch lock 301 of this embodiment differs from the above-described embodiments in the bottom wall forming portion 334 of the lock case 310, the latch bolt 311, and the cover member (not shown).

[0070] 10, an outwardly recessed engagement recess 350 is formed in the bottom wall forming portion 334 of the lock case 310. The engagement recess 350 is a recess into which a portion of the restricting member 85 can be fitted almost exactly.

[0071] The latch bolt 311 of this embodiment has a restriction member arrangement space 371, which is an internal space capable of accommodating the restriction member 85. This restriction member arrangement space 371 is a space formed above the inner bottom portion 372. The inner bottom 372 has two inclined surfaces. That is, the inner bottom 372 has an inclined surface that is lowest at the center in the width direction (front-rear direction) of the latch bolt 311 and that slopes upward from the center toward the front side (right side in FIG. 10). In addition, the inner bottom 372 has an inclined surface that slopes upward from the center toward the rear side (left side in FIG. 10). That is, the inner bottom 372 has a continuous surface that is roughly V-shaped in a cross section of the latch bolt 311 cut along a plane perpendicular to the protruding direction.

[0072] The restricting member arrangement space 371 is connected to the outside via two openings 380, 381. The openings 380, 381 are formed on the front and rear sides of the latch bolt 311, respectively, and are formed so as to face each other in the front-to-rear direction.

[0073] Here, when the latch bolt 311 of the latch lock 301 of this embodiment is in a retracted state, one opening 381 and the engagement recess 350 are aligned in the front-to-rear direction (left-to-right direction in FIG. 10). Although not shown, the other opening 380 and the engagement recess (not shown) provided in the cover member (not shown) are also aligned in the front-to-rear direction. The engagement recess (not shown) provided in the cover member is a recess that is recessed outward when the cover member is attached, similar to the engagement recess 350 described above, and a detailed description thereof will be omitted.

[0074] Next, we will explain in detail the operation of the regulating member 85 when the latch bolt 311 of the latch lock 301 of this embodiment is retracted and the door to which this latch lock 1 is attached is closed forcefully at a speed greater than a certain level. In this case, as shown in Figure 11, the action of centrifugal force accompanying the movement of the door causes the restricting member 85 to move upward on the inclined surface of the inner bottom portion 372. Then, a part of the restricting member 85 protrudes outward from the opening 381 and enters the engaging recess 350. At this time, another part of the restricting member 85 is positioned inside the latch bolt 311. This results in a restricted state in which the protruding movement of the latch bolt 311 is restricted. Depending on the direction in which the door is closed, the restricting member 85 moves upward on the other inclined surface, and a part of the restricting member 85 protrudes outward from the other opening 380. In this case, a part of the restricting member 85 enters an engaging recess formed in the cover member (not shown), and another part is positioned inside the latch bolt 311. This results in a restricted state in which the protruding movement of the latch bolt 311 is restricted.

[0075] Then, when the movement of the door slows down or stops, the restricting member 85 moves downward due to its own weight. That is, the restricting member 85 rolls down the inclined surface and moves downward. This causes a transition from the restricted state to the non-restricted state. That is, in this embodiment as well, the restricting member 85 moves between a non-restricting position where the entire restricting member 85 is located inside the latch bolt 311 and a restricting position where a portion of the restricting member 85 protrudes outside the latch bolt 311 and another portion of the restricting member 85 is located inside the latch bolt 311. This causes the restricting member 85 to switch between the non-restricting state and the restricting state.

[0076] As described above, when the latch lock is in the restricted state, the restricting member 85 may protrude upward from the latch bolt 11 (see FIG. 8), or may protrude forward or backward from the latch bolt 311 (see FIG. 11). In other words, it is sufficient that the restricting member 85 protrudes in a direction intersecting the direction of movement of the latch bolt 11 when it advances or retreats. Furthermore, the protruding portion of the latch bolt 11 may not only fit into the groove or recess, but may also abut against some other member or protrusion. In other words, it is sufficient if the movement of the latch bolt is restricted. However, from the viewpoint of more reliably restricting the movement of the latch bolt, it is preferable to have a structure in which the latch bolt fits into the groove or recess.

[0077] In each of the above-described embodiments, examples have been shown in which the connecting groove 87 (see Figure 3, etc.) is not formed when the latch bolt 11 is in a protruding state, and examples in which the engagement recess 350 and the opening 381 do not overlap in the front-to-rear direction. That is, in each of the above-described embodiments, when the latch bolt is in the retracted state, the restricting member can move to the restricting position. In other words, when in the retracted state, a movement path is formed along which the restricting member moves to the restricting position, and this movement path includes the restricting position. On the other hand, in each of the above-described embodiments, when the latch bolt moves from the retracted state in the protruding direction, the movement path including the restricting position is not formed, and the restricting member cannot move to the restricting position. With this structure, when the latch bolt moves from the retracted state in the protruding direction, the restricting member does not hinder the movement of the latch bolt. Therefore, the restricting member does not restrict the movement of the latch bolt when there is no need for the restricting member to restrict the movement of the latch bolt.

[0078] In the above-described embodiments, an example was shown in which a portion of the restricting member protrudes from the latch bolt side to the case side when the lock is in the restricted state, but it is also possible to configure it so that it protrudes from the case side to the latch bolt side. That is, a restricting member placement section for placing the restricting member is provided in part of the lock case or a member housed in the lock case, and a portion of the restricting member protrudes from inside the restricting member placement section due to centrifugal force. The portion of the restricting member protruding from the restricting member placement section is positioned further forward in the protruding direction (the protruding direction of the lock bolt) than a portion of the lock bolt in the retracted state, and is positioned so that they overlap in a plan view with the protruding direction as the line of sight. [Explanation of symbols]

[0079] 1,301 Latch lock (locking element) 2 doors 10,310 tablet cases 11,311 Latch bolt (lock bolt) 50 Case gutter 71 Bolt gutter section 85 Regulating member (protrusion regulating member) 87 Connection groove

Claims

1. A locking device that is attached to a door and has a lock case and a lock bolt, and a part of the lock bolt moves in and out of the lock case. The lock bolt has a protrusion-restricting member, and when the protrusion-restricting member is disposed in a protrusion-restricting position, the lock bolt is restricted from protruding by the protrusion-restricting member. When the protrusion restricting member is disposed in the non-restricting position, the protrusion restricting member is in a non-restricting state in which it does not restrict the protrusion of the lock bolt, The protrusion restricting member is moved from the non-restricting position to the protrusion restricting position by centrifugal force when the door moves, A lock member characterized in that the protrusion restricting member moves downward under its own weight, thereby moving from the protrusion restricting position to the non-restricting position and transitioning from the restricted state to the non-restricting state.

2. A locking member that is attached to a door and has a lock case and a lock bolt, and a part of the lock bolt moves in and out of the lock case, The lock bolt has a protrusion-restricting member, and when the protrusion-restricting member is disposed in a protrusion-restricting position, the lock bolt is restricted from protruding by the protrusion-restricting member. When the protrusion restricting member is disposed in the non-restricting position, the protrusion restricting member is in a non-restricting state in which it does not restrict the protrusion of the lock bolt, The protrusion restricting member is moved from the non-restricting position to the protrusion restricting position by centrifugal force when the door moves, A lock member characterized in that the protrusion control member moves upward against gravity when the centrifugal force generated when the door moves is equal to or greater than a certain level, and moves from the non-control position to the protrusion control position.

3. A locking member that is attached to a door and has a lock case and a lock bolt, and a part of the lock bolt moves in and out of the lock case, The lock bolt has a protrusion-restricting member, and when the protrusion-restricting member is disposed in a protrusion-restricting position, the lock bolt is restricted from protruding by the protrusion-restricting member. When the protrusion restricting member is disposed in the non-restricting position, the protrusion restricting member is in a non-restricting state in which it does not restrict the protrusion of the lock bolt, The protrusion restricting member is moved from the non-restricting position to the protrusion restricting position by centrifugal force when the door moves, The lock bolt has a bolt groove portion, The lock case or another member accommodated in the lock case is provided with a case side groove portion, When the lock bolt is retracted, the bolt groove and the case groove form a continuous connecting groove, A lock member characterized in that the protrusion restriction position includes a position that is a boundary between the bolt side groove portion and the case side groove portion within the connecting groove.

4. the protrusion restriction member is a sphere, the connecting groove is a groove at least part of which extends upward, A lock member as described in claim 3, characterized in that when the protrusion-restricting member moves from the protrusion-restricting position to the non-restricting position, the protrusion-restricting member moves along the connecting groove with at least a portion of the protrusion-restricting member positioned within the connecting groove.

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