Latch lock

Abstract

To provide a latch lock that can achieve a silence effect by providing an elastic member at only one location.SOLUTION: A latch lock 1, which has a lock case 6 and a latch bolt 7 and in which the latch bolt 7 moves in and out of the lock case 6 by operating handles provided on the front and back of a door 2, has an interlocking member 8 that moves together with the latch bolt 7 and an elastic member 9 as a one-piece elastic member provided between the interlocking member 8 and the lock case 6, and when the latch bolt 7 moves in the direction of protruding from the lock case 6 and retracting into the lock case 6, any part of the elastic member 9 contacts the interlocking member 8 or the lock case 6.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a latch lock that is provided on a door that rotates to open and close. [Background technology]

[0002] The latch lock has a lock case that is fitted with a latch bolt that protrudes from and retracts into the lock case. Also, inside the lock case is an operating part that is operated by operating a handle on the front and back of the door. Between the operating part and the latch bolt, there is provided an interlocking member (link member) that interlocks the operation of the handle and the latch bolt. Furthermore, the lock case is provided with a pressure spring that urges the latch bolt so that the latch bolt protrudes from the lock case. A stopper that abuts against the interlocking member is provided so that the operating part stops in its original position.

[0003] When a person opening or closing a door operates the handle, the latch bolt retracts into the lock case, disengaging the latch bolt (latch) from the recess (strike) on the structure, allowing the door to open or close. When the hand is released from the handle in this state, the handle returns to its original position due to the biasing force of the compression spring, and the latch bolt protrudes from the lock case. The latch bolt protruding from the lock case then engages with the recess (strike) on the structure, and the door enters a closed state where it cannot be rotated.

[0004] The latch bolt, pressed by the pressure spring, moves vigorously, and the interlocking member moves following the latch bolt. The interlocking member then comes into contact with the stopper and stops, and the latch bolt stops protruding. At that time, the interlocking member and the stopper collide, making a "click" sound. This is how the harsh sound that occurs when the door handle returns to its original position is produced.

[0005] Therefore, various efforts have been made in the past to prevent this collision sound. For example, in the latch lock disclosed in Patent Document 1, a configuration is disclosed in which the elastic force of an elastic member is used to cushion the impact of the collision between the members when the latch bolt protrudes from the lock box, thereby reducing the collision sound. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 5133825 Summary of the Invention [Problem to be solved by the invention]

[0007] Incidentally, in a conventional latch lock such as that disclosed in Patent Document 1, unless elastic members are provided at multiple locations on the interlocking member that reciprocates, it is not possible to suppress the generation of impact noise.

[0008] SUMMARY OF THE PRESENT EMBODIMENTS The present invention has an object to provide a latch lock that can achieve a noise-reduction effect by simply providing an elastic member in one location. [Means for solving the problem]

[0009] The first aspect of the invention for solving the above problems is a latch lock having a lock case and a latch bolt, in which the latch bolt advances and retreats relative to the lock case by operating a handle provided on the front and back of the door, and having an interlocking member that moves together with the latch bolt, with an integral elastic member provided between the interlocking member and the lock case, and when the latch bolt moves in the direction of protruding from the lock case or in the direction of retracting into the lock case, any part of the elastic member abuts against the interlocking member or the lock case.

[0010] According to this aspect, the latch lock has a lock case and a latch bolt, and the latch bolt advances and retreats relative to the lock case by operating a handle provided on the front and back of the door, and has an interlocking member that moves with the latch bolt, and an integral elastic member is provided between the interlocking member and the lock case. In other words, there is no need to install elastic members in multiple locations. When the latch bolt moves in the direction protruding from the lock case or retracting into the lock case, some part of the elastic member comes into contact with the interlocking member or the lock case, so noise is less likely to be generated when the latch bolt moves forward or backward. In other words, the one-piece elastic member can provide a sound-deadening effect. When the latch bolt retracts into the lock case, for example, the interlocking member abuts one side of the one-piece elastic member, and when the latch bolt protrudes from the lock case, the interlocking member abuts against the other side of the elastic member spaced from the one side. The "part on one side" and the "part on the other side" of these elastic members correspond to "any part of the elastic member." In addition, the term "interlocking member" includes a separate member that is integral with the "interlocking member." In addition, the term "lock case" includes a separate member that is fixed to the "lock case." Furthermore, the term "integral" includes not only the case where the elastic member is made of a single material, but also the case where the elastic member is made of two or more materials, and the multiple materials may include a material that does not have elasticity.

[0011] It is preferable that the elastic member is fixed to the lock case, and both sides of the elastic member in the advancing / retracting direction of the latch bolt form abutment portions that abut against the interlocking member.

[0012] This configuration simplifies the layout inside the lock case. Specifically, the interlocking members are arranged in the regions on both sides of the one-piece elastic member, and the moving interlocking member stops when it comes into contact with the elastic member between the two regions.

[0013] It is preferable that the elastic member is attached to the lock case or the interlocking member in a cantilever manner, and a portion on the free end side of the elastic member abuts against the interlocking member or the lock case, which moves relatively.

[0014] According to this configuration, the elastic member is attached to the lock case or interlocking member in a cantilever shape, and the free end of the elastic member abuts against the relatively moving interlocking member or lock case, so the elastic member is easily deformed when abutted against the lock case or interlocking member. This makes it easier to absorb the impact of a collision, and therefore provides a good sound deadening effect. Effect of the Invention

[0015] According to the latch lock of the present invention, a single elastic member can suppress the generation of impact noise that accompanies movement of the latch bolt during handle operation. [Brief description of the drawings]

[0016] [Figure 1] 1A and 1B are front views of a latch lock according to the present embodiment attached to a door, in which (a) shows a locked state and (b) shows an unlocked state. [Diagram 2] 1 is a perspective view of a latch lock according to this embodiment, showing a state in which the lid of the lock case has been removed. [Diagram 3] 3 is an exploded perspective view showing the latch lock of FIG. 2 disassembled into its individual members. FIG. [Figure 4] FIG. 2A is a perspective view showing a state in which the latch bolt and the interlocking member are separated, and FIG. 2B is a perspective view showing a state in which the latch bolt and the interlocking member are engaged with each other. [Diagram 5] A side view showing the lock case attached to the door. [Figure 6] 2A and 2B are front views of a latch lock according to another embodiment different from that of FIG. 1 attached to a door, where (a) shows a locked state and (b) shows an unlocked state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] The following description will be given with reference to the drawings. As shown in Figures 1(a) and 1(b), the latch lock 1 has a lock case 6, a latch bolt 7, and an interlocking member 8. The directions indicated by the arrows in Figures 1(a) and 1(b) are the front-to-rear directions of the latch lock 1. In other words, the direction in which the latch bolt 7 protrudes is the front, and the direction in which it retracts is the rear.

[0018] As shown in Fig. 2, the lock case 6 is composed of a main body 6a and a cover body 6b. The main body 6a constitutes a housing that houses each component of the latch lock 1. That is, as shown in Figs. 2 and 3, the main body 6a has a latch bolt arrangement region 16 in which a latch bolt 7 described below is arranged, an interlocking member arrangement region 17 in which an interlocking member 8 is arranged, and an elastic member fixing portion 18 that fixes an elastic member 9. The interlocking member arrangement region 17 is provided below the latch bolt arrangement region 16. In addition, the elastic member fixing portion 18 is provided at the lower portion near the center of the interlocking member arrangement region 17 (the bottom of the main body 6a).

[0019] The elastic member fixing part 18 is a part for fixing the elastic member 9, and is provided so as to protrude upward from the bottom wall of the lock case 6 (main body 6a). The elastic member fixing part 18 has a relatively large tip portion (upper end portion) and a small connection portion with the bottom wall of the lock case 6. In other words, the elastic member fixing part 18 has a constricted structure.

[0020] The elastic member 9 is an integral part made of a single elastic material such as synthetic rubber. Here, the term "integral part" refers to a single member, and includes not only the case where the elastic member 9 is made of a single material, but also the case where the elastic member 9 is made of two or more materials. In this embodiment, the elastic member 9 is made of a single material (elastic material), but the elastic member 9 may be made of multiple materials, and the multiple materials may include a material that does not have elasticity.

[0021] The elastic member 9 has a groove 21. The opening of the groove 21 is relatively narrow, and the inside of the groove 21 is relatively wide. The groove 21 can accommodate the elastic member fixing part 18. That is, the elastic member 9 is fitted onto the elastic member fixing part 18 so as to enclose the upwardly protruding elastic member fixing part 18 from above. The elastic member 9 fixed to the elastic member fixing part 18 is arranged in the interlocking member arrangement area 17 in the lock case 6.

[0022] The elastic member 9 has a front end 9a and a rear end 9b. The front end 9a and the rear end 9b are provided on one side (front side) and the other side (rear side) in the front-rear direction of the elastic member 9. The front end 9a and the rear end 9b form contact parts that come into contact with the interlocking member 8 (elastic member contact parts 11a, 11b described below).

[0023] Further, a plate-shaped mounting plate 14 for mounting a decorative plate 15 is provided on an end face of the lock case 6. The decorative plate 15 is a plate-shaped member that coincides with the end face of the door 2. The mounting plate 14 and the decorative plate 15 each have a through hole, and these through holes communicate with each other to form the escape hole 13. The escape hole 13 is provided in front of the latch bolt arrangement area 16.

[0024] The cover 6b (Figs. 2 and 3) is a member that is integrated with the main body 6a to close the main body 6a. The main body 6a and the cover 6b are provided with holes 20a and 20b. The holes 20a and 20b communicate with a through hole 8b of the interlocking member 8, which will be described later. The decorative plate 15 and the lock case 6 are fixed to the door 2 in the same manner as in a conventionally known latch lock.

[0025] The latch bolt 7 has a structure similar to that of conventionally known latch bolts. That is, the latch bolt 7 has a shaft shape, a latch 7a at its tip (front end), and an engagement portion 7b at its rear end. As shown in Fig. 3, the engagement portion 7b has a flange shape.

[0026] The latch bolt 7 is arranged in the latch bolt arrangement area 16 of the lock case 6. The latch bolt 7 can be housed within the latch bolt arrangement area 16, and can slide only in the front-rear direction along the latch bolt arrangement area 16. When the latch bolt 7 moves forward, the latch 7a at the tip protrudes from the latch hole 13 to the outside.

[0027] Furthermore, a coil spring 10 is provided in the latch bolt arrangement region 16. The coil spring 10 is a compression spring arranged between the latch bolt 7 and the lock case 6 (main body 6a). The latch bolt 7 is constantly biased toward the latch hole 13 by the biasing force of the coil spring 10. Therefore, the latch 7a at the tip protrudes to the outside from the latch hole 13 (FIG. 1(a)).

[0028] Next, the interlocking member 8 (link member) will be described. The interlocking member 8 is a member having, from the top, a latch bolt fixing portion 8a, a through hole 8b, and elastic member abutment portions 11a and 11b. The interlocking member 8 also has a function of interlocking the operation of the latch bolt 7 with that of handles 4a and 4b, which will be described later.

[0029] The latch bolt fixing portion 8a is a portion that forms a generally T-shaped groove that is open at the top. The engagement portion 7b at the rear end of the latch bolt 7 fits exactly into and engages with the latch bolt fixing portion 8a (FIG. 4(b)). In the state shown in FIG. 4(b), the latch bolt 7 and the interlocking member 8 move together in the front-rear direction. In other words, when the interlocking member 8 moves in the front-rear direction, the latch bolt 7 also moves in the front-rear direction.

[0030] The through hole 8b is a hole that penetrates the interlocking member 8 in a direction perpendicular to the front-rear direction (horizontal direction). The through hole 8b is provided in the center of the interlocking member 8, below the latch bolt fixing portion 8a. The rear side wall surface of the inner surface of the through hole 8b constitutes a pressed portion 12, which will be described in detail later.

[0031] Elastic member abutment portions 11a and 11b are provided below the through hole 8b of the interlocking member 8. The elastic member abutment portions 11a and 11b are portions that form wall surfaces that are spaced apart from each other in the front-rear direction (the direction in which the latch bolt 7 advances and retreats). In other words, a space 19 is formed between the elastic member abutment portions 11a and 11b.

[0032] In this embodiment, the elastic member abutment portions 11a, 11b protrude downward, and when the interlocking member 8 is viewed from above, the lower portion of the interlocking member 8 has a generally U-shape that is open downward.

[0033] The latch lock 1 is configured as follows. That is, the latch bolt 7 is arranged in a latch bolt arrangement region 16 of the lock case 6 (main body 6a), and the interlocking member 8 is arranged in an interlocking member arrangement region 17.

[0034] 4(b), the latch bolt 7 and the interlocking member 8 are engaged and integrated. In the space 19 of the interlocking member 8 arranged in the interlocking member arrangement region 17, one elastic member 9 is arranged.

[0035] The elastic member 9 has a lower portion fixed to the lock case 6 (main body 6a) and an upper portion not fixed. In other words, the upper portion of the elastic member 9 is a free end, and the elastic member 9 is fixed to the lock case 6 in a cantilever manner.

[0036] 1(a), in this embodiment, the upper end of the elastic member fixing portion 18 is lower than the lower ends of the elastic member abutment portions 11a, 11b of the interlocking member 8. In other words, if the elastic member 9 is not attached to the elastic member fixing portion 18, the interlocking member 8 can move above the elastic member fixing portion 18 without coming into contact with the elastic member fixing portion 18.

[0037] Regardless of this embodiment, the height of the upper end of the elastic member fixing portion 18 may be higher than the height of the lower ends of the elastic member abutment portions 11a, 11b of the interlocking member 8.

[0038] The latch bolt 7 is biased forward by the coil spring 10. Therefore, the latch bolt 7 moves to the front side of the latch bolt arrangement area 16, and the latch 7a protrudes from the latch hole 13 to the outside of the lock case 6.

[0039] The interlocking member 8 integrated with the latch bolt 7 also moves forward of the interlocking member arrangement region 17. As a result, the elastic member abutment portion 11b on the interlocking member 8 side abuts against the rear end portion 9b of the elastic member 9 attached to the elastic member fixing portion 18 on the lock case 6 (main body 6a) side. As shown in FIG. 1(a), since the elastic member abutment portion 11b abuts against the rear end portion 9b of the elastic member 9, the latch bolt 7 and the interlocking member 8 are prevented from moving forward any further.

[0040] The operation parts 5a, 5b of the handles 4a, 4b described below are disposed in the through hole 8b of the interlocking member 8. That is, the operation parts 5a, 5b pass through the hole 20a of the main body 6a of the lock case 6 and the hole 20b of the cover body 6b, and reach the through hole 8b of the interlocking member 8 inside the lock case 6.

[0041] The side wall surface on the retracted side (rear side) of the through hole 8b constitutes a pressed portion 12. The pressed portion 12 is a portion that is pressed by operation portions 5a, 5b described below.

[0042] Next, a state in which the latch lock 1 is attached to the door 2 will be described. FIG. 5 shows a state in which the latch lock 1 according to this embodiment is attached to a pivoting door 2.

[0043] The lock case 6 (latch lock 1) is built into the door 2 so that its end face is flush with the edge of the door 2. That is, as shown in FIG. 1(a), the decorative plate 15 on the lock case 6 side is flush with the end face of the door 2.

[0044] As shown in Fig. 5, handles 4a, 4b are provided on the front and back of the door 2. The handles 4a, 4b are push-pull type handles. The handles 4a, 4b are provided with operating parts 5a, 5b. The operating parts 5a, 5b penetrate the door 2 and the lock case 6 (hole 20a in the main body 6a and hole 20b in the cover body 6b shown in Fig. 3) and are arranged in the through hole 8b of the interlocking member 8. The operating parts 5a, 5b are well known and are configured to move backward as shown in Fig. 1(a) when the handles 4a, 4b are operated.

[0045] When the handle 4a (or 4b) is operated, the operating part 5a (or 5b) swings backward, and the pressed part 12 of the interlocking member 8 is pressed against the operating part 5a (or 5b). As a result, the interlocking member 8 moves backward (toward the retracting side) together with the latch bolt 7, and the latch 7a of the latch bolt 7 retracts into the lock case 6 (into the latch bolt arrangement area 16) (FIG. 1(b)).

[0046] When the elastic member abutment portion 11a of the interlocking member 8 abuts against the front end portion 9a of the elastic member 9, the rearward movement of the latch bolt 7 and the interlocking member 8 stops (FIG. 1(b)). At that time, the elastic member abutment portion 11a abuts against the front end portion 9a of the elastic member 9, so that the generation of the collision sound is suppressed.

[0047] When the person who operates the handle 4a (or 4b) releases the handle 4a (or 4b), the latch bolt 7 moves forward due to the biasing force of the coil spring 10, and the latch 7a protrudes from the lock case 6 (door 2). The interlocking member 8 also moves forward together with the latch bolt 7 (Fig. 1(a)).

[0048] Then, the elastic member abutment portion 11b of the interlocking member 8 moves relative to the elastic member 9 and abuts against the rear end portion 9b of the elastic member 9, and the forward movement of the latch bolt 7 and the interlocking member 8 stops (FIG. 1(a)). At that time, the elastic member abutment portion 11b abuts against the rear end portion 9b of the elastic member 9, so that the generation of the impact sound is suppressed.

[0049] Here, the elastic member 9 is attached to the lock case 6 in a cantilever manner, and the upper part of the elastic member 9 is a free end. The height of the upper end of the elastic member fixing part 18 is lower than the height of the lower ends of the elastic member abutment parts 11a, 11b of the interlocking member 8. Therefore, when the interlocking member 8 collides with the front end part 9a or the rear end part 9b of the upper part (free end side) of the elastic member 9, a shear force acts on the elastic member 9. The elastic member 9 withstands the shear force while deforming. Therefore, the impact when the interlocking member 8 collides with the elastic member 9 is well mitigated, and the generation of collision noise is well suppressed.

[0050] In this way, the range of reciprocating movement of the latch bolt 7 and the interlocking member 8 is limited by the abutment (collision) of the interlocking member 8 (elastic member abutment parts 11a, 11b) with the elastic member 9 (front end part 9a, rear end part 9b).

[0051] And because the elastic member 9 is an elastic member, the impact of the collision is mitigated and collision noise is less likely to occur. That is, a sound deadening effect is achieved by the integral elastic member 9. In other words, with the latch lock 1, the sound deadening effect can be achieved by providing the elastic member 9 in only one place, and there is no need to provide elastic members in multiple places as in conventional latch locks.

[0052] Specifically, the interlocking member 8 and the elastic member 9 effectively suppress the generation of the "click" collision noise that previously occurred when the interlocking member 8 (latch bolt 7) moves forward and the latch 7a protrudes from the lock case 6 (door 2), and when the interlocking member 8 (latch bolt 7) moves backward and the latch 7a retracts into the lock case 6 (door 2).

[0053] Furthermore, when the door 2 is in the closed state, if the latch bolt 7 protrudes, the tip (latch) of the latch bolt 7 engages with the recess 3a (strike) of the door stop 3 of the fixed structure. This disables the door 2 from opening. Then, when the latch bolt 7 retracts into the lock case 6 (inside the door 2) against the biasing force of the coil spring 10, the tip (latch) of the latch bolt 7 and the recess 3a (strike) are disengaged, allowing the door 2 to open.

[0054] In this embodiment, an example has been shown in which the elastic member 9 is provided in one location on the lock case 6 (main body 6a), but as shown in Figures 6(a) and 6(b), the elastic member 59 can also be provided on the interlocking member 58 side. The elastic member 59 is a buffer member having a similar structure to the elastic member 9.

[0055] The latch lock 51 shown in Figures 6(a) and 6(b) has a structure that is generally the same as the latch lock 1 shown in Figure 1(a), but the structures of the interlocking member 58 and the lock case 56 (main body 56a) are slightly different. Below, only the different configurations will be explained, and overlapping explanations will be omitted.

[0056] An elastic member fixing part 68 is provided at the lower part of the interlocking member 58. The elastic member fixing part 68 has a structure in which the orientation of the elastic member fixing part 18 shown in FIG. 1(a) is upside down and provided at the lower part of the interlocking member 58. The lower end of the elastic member fixing part 68 is higher than the upper ends of the elastic member abutment parts 61a, 61b. An elastic member 59, which is an integral part, is attached to this elastic member fixing part 68. In other words, the elastic member 59 is integrated with the interlocking member 58.

[0057] Meanwhile, a recess 61 is provided in the bottom wall of the lock case 56. The recess 61 extends in the front-rear direction, and elastic member abutment portions 61a, 61b are formed at the front and rear ends. The elastic member 59 attached to the interlocking member 58 is disposed in the recess 61. That is, the elastic member 59 is disposed between the elastic member abutment portions 61a, 61b.

[0058] When the latch 57a of the latch bolt 57 protrudes from the door 52 due to the biasing force of the coil spring 60, the front end 59a of the elastic member 59 abuts against the elastic member abutment portion 61a, as shown in Fig. 6(a). Also, the latch 57a protrudes from the door 52 and enters (engages) with the recess 53a of the door stopper 53.

[0059] In addition, when a handle (not shown) is operated, the operating portion 55a (or 55b) interlocked with the handle presses the interlocking member 58 backward. As a result, as shown in FIG. 6(b), the latch bolt 57 and the interlocking member 58 move backward, the latch 57a retracts into the door 52, and the rear end portion 59b of the elastic member 59 abuts against the elastic member abutment portion 61b. That is, the elastic member abutment portion 61b moves relative to the elastic member 59.

[0060] Here, the elastic member 59 is attached to the interlocking member 58 in a cantilever manner, and the lower end of the elastic member 59 is a free end. In addition, the height of the lower end of the elastic member fixing part 68 is higher than the elastic member abutment parts 61a and 61b of the lock case 56.

[0061] Then, the elastic member abutment portion 61a or 61b on the lock case 56 collides with the front end portion 59a or rear end portion 59b on the lower side, which is the free end side of the elastic member 59. That is, the upper side of the elastic member 59 is fixed, and the lower side collides with the elastic member abutment portion 61a or 61b, so a shear force acts on the elastic member 59. The elastic member 59 withstands the shear force while deforming. Therefore, the impact at the time of collision is well mitigated, and the generation of collision noise is well suppressed.

[0062] 6(a) and 6(b), the elastic member 59, which is a one-piece elastic member, moves and comes into contact with the elastic member contact portions 61a, 61b of the recess 61 of the stopped lock case 56. Even in this latch lock 51, the collision sound generated when the latch bolt 57 advances or retreats is effectively silenced. That is, in the latch lock 51, the elastic member 59 is provided in only one place, and thus a sound silencing effect can be achieved.

[0063] In the examples shown in Figures 1(a), 1(b), 6(a), and 6(b), both front-rear portions of the elastic members 9, 59 abut against the interlocking member 8 (elastic member abutment portions 11a, 11b) and the lock case 56 (elastic member abutment portions 61a, 61b). However, which portion of the elastic member abuts against the interlocking member or the lock case can be selected arbitrarily by devising the shapes and layout of the elastic member, interlocking member, and lock case. For example, the center portion of the elastic member may be hollowed out to create an internal space, and the interlocking member or the lock case may be inserted and abutted against the inner wall that divides the internal space. [Explanation of symbols]

[0064] 1, 51 Latch lock 2, 52 Doors 3,53 per household 3a, 53a recess 4a, 4b Handle 5a, 5b Operation section 6, 56 tablet case 7, 57 Latch bolt 8, 58 Interlocking members 9, 59 Elastic members 11a, 11b, 61a, 61b Elastic member contact portion

Claims

1. A lock case and a latch bolt are provided. A latch lock in which the latch bolt advances and retreats relative to the lock case by operating a handle provided on the front and back of the door, A linking member that moves together with the latch bolt in the forward and backward directions, An integral elastic member is provided between the interlocking member and the lock case, A latch lock characterized in that when the latch bolt moves in the direction of protruding from the lock case and in the direction of retracting into the lock case, any portion of the elastic member abuts against the interlocking member or the lock case.

2. A lock case and a latch bolt, A latch lock in which the latch bolt advances and retreats relative to the lock case by operating a handle provided on the front and back of the door, A linking member that moves together with the latch bolt, An integral elastic member is provided between the interlocking member and the lock case, When the latch bolt moves in a direction protruding from the lock case or in a direction retracting into the lock case, any portion of the elastic member comes into contact with the interlocking member or the lock case, and A latch lock characterized in that the elastic member is fixed to the side of the lock case, and both sides of the elastic member in the direction of the advancement and retreat of the latch bolt form a contact portion that abuts against the interlocking member.

3. A lock case and a latch bolt, A latch lock in which the latch bolt advances and retreats relative to the lock case by operating a handle provided on the front and back of the door, A linking member that moves together with the latch bolt, An integral elastic member is provided between the interlocking member and the lock case, When the latch bolt moves in a direction protruding from the lock case or in a direction retracting into the lock case, any portion of the elastic member comes into contact with the interlocking member or the lock case, and The elastic member is attached to the lock case or the interlocking member in a cantilever manner, A latch lock characterized in that a portion of the free end side of the elastic member abuts against the interlocking member or the lock case which moves relatively.

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