JP2014105516A - Lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lock in which the number of parts can be reduced in comparison with that of the conventional one.SOLUTION: A lock has a locking member 8 which restricts movement of a latch bolt 3 and is lockable. The locking member 8 has a locking insertion member 71 interposed between a part of the latch bolt 3 and a lock case 2 and a state maintenance part 36 for maintaining the state of the locking insertion member 71 at the time of locking. The state maintenance part 36 is made of resin and is formed by molding integrally with the lock case 2. Since the state maintenance part 36 and the lock case 2 are integrally molded, the number of components can be reduced.

Description

  The present invention relates to a lock, and more particularly to a latch lock having a locking function.

The latch lock is attached to the end surface on the free end side of the door. That is, one side of the door is fixed to the door frame with a hinge, and the other end (the side opposite to the fixed side of the door frame) is a free end.
The latch lock is one in which the latch comes and goes from the lock case by operating the handle. For example, there is a latch lock described in Patent Document 1.
Further, among conventional latch locks, there is a latch lock having a locking function. For example, in the latch lock 100 shown in FIG. 20, the latch bolt 102 is retracted into the lock case 101 by interposing a fixing member 105 between the lock case 101 and the seat plate 103 of the latch bolt 102. It has a locking mechanism to prevent it.
More specifically, the locking mechanism is configured such that, when locking, the fixing member 105 is caused to enter the track in the moving direction of the latch bolt 102 by the urging force of the torsion spring 106, and the seat plate 103 abuts the fixing member 105 to latch the bolt. It is a mechanism that regulates and locks the movement of 102.

JP-A-8-21001

  As a matter of course, the latch lock provided with this locking mechanism has more parts than the latch lock provided with a normal locking mechanism, so the number of parts is increased, and the assembly process is increased. Become. Moreover, if each component is installed in the lock case of the latch lock, the installation space for the torsion spring becomes considerably narrow. In order to provide a locking mechanism, the torsion spring must be positioned in this narrow installation space, but the torsion spring has a repulsive force (restoring force) when it is positioned, so it is difficult to assemble and workability is poor. It was.

  Then, this invention makes it a subject to provide the lock | rock which can reduce a number of parts compared with the past.

  The inventor believes that, when the locking mechanism is provided in the latch lock, if the function of the torsion spring can be added to the lock case, the number of parts can be reduced and the troublesome assembly work due to the restoring force of the torsion spring can be eliminated. It was. However, since a normal lock case is made of metal, it is difficult to process a small member such as a lock case, and even if a metal lock case can be processed, it is expensive. There's a problem. Therefore, the inventor considered that the function of the torsion spring can be added to the lock case while suppressing the cost by molding the lock case having the function of the torsion spring with an inexpensive resin.

  The invention according to claim 1, which is derived based on this idea, is a lock attached to a door, and includes a lock case, an engagement piece for a door that engages with another member to close the door, In a lock having a drive mechanism related to the operation of the door engagement piece, the drive case is built in the lock case, and the drive mechanism includes an elastic member, the lock case is formed of resin. And one or more of the elastic members are resin-made elastic members, which are formed integrally with the lock case, and a fixed portion joined to the lock case and a free portion separated from the lock case The free part is engaged with a member constituting the drive mechanism or the door engagement piece.

According to the configuration of the present invention, one or more of the elastic members and the lock case are made of resin. Therefore, it can be manufactured at a lower cost than a conventional metal lock case.
According to the configuration of the present invention, one or more of the elastic members are formed integrally with the lock case. That is, since the lock case and the elastic member are inseparably integrated, the lock case and the resin elastic member do not deviate regardless of the posture of the resin elastic member. Therefore, the latch lock of the present invention can reduce the number of parts as compared with the conventional latch lock, and is easy to assemble without being detached from the lock case.
Furthermore, according to the structure of this invention, the free part of the said resin-made elastic member is engaging with the structural member of the said drive mechanism, or the engagement piece for doors. Therefore, the elastic force of the resin-made elastic member is transmitted to the constituent member of the drive mechanism or the door engagement piece, and the relative position of the drive mechanism constituent member or the door engagement piece with respect to the lock case can be positioned. .

  According to a second aspect of the present invention, the elastic member made of resin is a leaf spring, the width direction of the resin elastic member is formed so as to substantially coincide with the thickness direction of the lock case, and the whole is bent in a wave shape. The lock according to claim 1, wherein the lock is deformed in a direction in which the linear distance between the fixed portion and the free portion expands and contracts.

  The “wave shape” here includes not only a sine wave waveform but also a rectangular wave, a triangular wave, and a sawtooth waveform.

  According to the configuration of the present invention, the resin elastic member is formed in a posture in which the width direction of the resin elastic member substantially coincides with the thickness direction of the lock case, and is entirely bent in a wavy shape between the fixed portion and the free portion. The linear distance is deformed in the direction of expansion and contraction. Therefore, unlike metals, even a resin that does not have elasticity in the material itself can have elasticity.

  The invention according to claim 3 is a latch lock that allows a latch bolt to be taken in and out of the lock case in conjunction with the handle, and the drive mechanism includes a lock mechanism that can lock the lock by restricting the movement of the latch bolt. Includes an operation piece that is operated from the outside and a fixing member that is separate or integral with the operation piece. When the operation piece is operated, the fixing member moves and / or changes its posture, and a part of the latch bolt is locked. The free part of the elastic member made of resin protrudes and intrudes between the case and directly or indirectly engages with the operation piece or the fixing member to bias the operation piece or the fixing member in the orientation. The lock according to claim 1 or 2, wherein:

According to the configuration of the present invention, when the operation piece is operated, the fixing member moves and / or changes its posture, and appears and disappears between a part of the latch bolt and the lock case. That is, at the time of unlocking, the fixing member is retracted from a part of the latch bolt and the lock case, and a space into which the latch bolt can enter is formed between the latch bolt and the lock case. Therefore, it is possible to take a retracted posture in which most or all of the latch bolts are retracted into the lock case. Further, at the time of locking, the fixing member moves in a space between a part of the latch bolt and the lock case, so that the fixing member spatially blocks the movement of the latch bolt. Since the latch bolt cannot enter the space, it can be securely locked.
Further, according to the configuration of the present invention, the free portion of the resin elastic member is directly or indirectly engaged with the operation piece or the fixing member and biased in a direction to maintain the posture of the operation piece or the fixing member. To do. That is, unless the predetermined unlocking operation is performed, since the posture of the operation piece or the fixing member cannot be changed, the locked state is not released.

  According to a fourth aspect of the present invention, the operation piece is rotatable from the locking angle to the unlocking angle, the free portion of the resin elastic member is directly or indirectly engaged with the operation piece, and the operation piece is While rotating from one side of the locking angle and the unlocking angle to the other side, the elastic member made of resin passes through the thought point where it is most compressed, and after passing the thought point, the elastic force of the elastic member made of resin The lock according to claim 3, wherein the operation piece is urged to rotate to the other side.

  According to the configuration of the present invention, while the operation piece rotates from one side to the other side of the locking angle and the unlocking angle, the resin elastic member passes through the thought point where the compression state is the most compressed, and the thought point passes. Thereafter, the operation piece is biased so as to rotate to the other side by the elastic force of the resin elastic member. Therefore, it is easy to switch from the unlocked state to the locked state and / or from the locked state to the unlocked state.

  By the way, the length of the back lock (the length from the front to the center of the handle or the keyhole) is specified, and the latch lock can be formed without changing from the conventional size from the viewpoint of providing versatility. preferable. However, since the lock case of the present invention is made of resin, there is a concern about strength.

  Therefore, the invention according to claim 5 is the lock according to any one of claims 1 to 4, wherein the lock case has a rib for reinforcing the rigidity of the lock case.

  According to the structure of this invention, since the said lock case has the rib which reinforces the rigidity of a lock case, rigidity is reinforced and it is hard to break.

  According to a sixth aspect of the present invention, the lock case is formed of a first lock case and a second lock case, and the first lock case has a first engaging portion formed integrally. The second lock case has an integrally formed second engagement portion, and the first lock case and the second lock case are engaged by the engagement of the first engagement portion and the second engagement portion. Is a lock according to any one of claims 1 to 5.

  According to the configuration of the present invention, the first lock case and the second lock case are integrated by engaging the first engagement portion and the second engagement portion. That is, since the first lock case and the second lock case can be integrated without providing a fastening element such as a screw, the number of parts can be further reduced, and the assembling work is facilitated.

By the way, when the first lock case and the second lock case are not integrated by the fastening element, when the posture is changed, the movement of each member may cause the first lock case and the second lock case to swell away from each other. is there. Therefore, if the integrated strength is weak, the first lock case and the second lock case may be separated in the changed posture.
Further, if the lock case is reinforced with ribs or the like, the installation space for each member in the housing is reduced. Therefore, the movable area of each member is limited.
Therefore, the inventor sought a structure that further increases the integrated strength by utilizing the positional relationship within the movable region of each member.

  The invention according to claim 7 thus guided is capable of switching between an unlocking posture in which the latch bolt can be taken in and out and a locking posture in which the taking in and out of the latch bolt is restricted by the rotation of the key. The lock case is formed of a first lock case and a second lock case, and both the first lock case and the second lock case have protrusions, and the protrusions overlap each other. The fixing member has two locking engagement pieces arranged at a predetermined interval, and the locking engagement piece moves with the rotation of the key and is unlocked. The lock according to any one of claims 3 to 6, wherein in the posture or the locking posture, the protrusion fits into the interval in a state of overlapping.

  According to the configuration of the present invention, the locking engagement piece moves with the rotation of the key, and is fitted in the unlocked posture or the locked posture with the protruding portion overlapping between the locking engagement pieces. . That is, the protruding portion of the first lock case and the protruding portion of the second lock case are sandwiched by the locking engagement pieces of the fixing member in an overlapping state. Therefore, the integrated strength of the first lock case and the second lock case is reinforced by the rigidity of the fixing member, and the first lock case and the second lock case are not easily separated from each other.

  According to an eighth aspect of the present invention, the rotation of the handle switches between a protruding posture in which the latch bolt protrudes from the lock case and a retracted posture in which the latch bolt is retracted into the lock case. The lock case and the second lock case are both formed. The first lock case and the second lock case both have engaging pieces, and have a hub member that transmits the rotational force of the handle to the latch bolt. The hub member has two hub protruding pieces arranged at a predetermined interval, and the hub member moves as the handle rotates, and the engaging piece is in the protruding position or the retracted position. The lock according to any one of claims 3 to 7, wherein the lock is fitted into the gap in a close state.

  According to the structure of this invention, the said hub member moves with rotation of a handle | steering_wheel, and fits in the state which the said engagement piece adjoined between hub protrusion pieces in the protrusion attitude | position or the retracted attitude | position. That is, the engagement piece of the first lock case and the engagement piece of the second lock case are sandwiched by the hub protruding piece of the hub member in a state of being close to each other. Therefore, the integrated strength of the first lock case and the second lock case is reinforced by the rigidity of the hub member, and the first lock case and the second lock case are not easily separated from each other.

  According to a ninth aspect of the present invention, the first lock case or the second lock case has a through hole in the vicinity of the engagement piece, and the engagement piece has a tapered inclined surface. The lock according to claim 8, wherein the inclined surface abuts on the hub protruding piece when the posture is switched to a protruding posture or a retracted posture, and guides the hub protruding piece to the through hole.

  According to the configuration of the present invention, the inclined surface abuts each hub protruding piece of the hub member and guides the hub protruding piece to the through hole when switching the posture to the protruding posture or the retracted posture. The piece can be easily engaged (fitted) with the engagement piece, and the integral strength can be further reinforced.

  According to the lock of the present invention, the number of parts can be reduced as compared with the conventional lock, and workability at the time of assembly is improved.

It is a perspective view which shows the usage example of the latch lock in 1st Embodiment of this invention. It is a perspective view of the latch lock of FIG. It is a disassembled perspective view of the latch lock of FIG. It is a front view of the latch lock of FIG. 1, and represents the state which removed the 2nd lock case. It is an enlarged view of the 1st lock case of FIG. It is the perspective view which looked at the 1st lock case of Drawing 5 from another direction. It is the perspective view which looked at the 2nd lock case of Drawing 3 from another direction. It is the perspective view which looked at the 2nd lock case of FIG. 7 from the direction different from FIG. It is the perspective view which looked at the main member of Drawing 3 from another direction. It is a front view of each attitude | position of the latch lock of FIG. 1, and represents a protrusion attitude | position (unlocking attitude | position). It is a partially broken front view of the latch lock of the state of FIG. It is a front view of each attitude | position of the latch lock of FIG. 1, and represents a retracted attitude | position. It is a partially broken front view of the latch lock of the state of FIG. It is a cross-sectional view of the latch lock in the state of FIG. It is the partially broken front view of the latch lock of the state of FIG. 10, and is the front view which fractured | ruptured the site | part different from FIG. It is a front view of each attitude | position of the latch lock of FIG. 1, and represents a locking attitude | position. It is a partially broken front view of the latch lock of the state of FIG. 16, and represents a locking posture. It is a cross-sectional view of the state of FIG. It is explanatory drawing of the relationship of the force in each attitude | position of the latch lock of FIG. 1, (a) represents an unlocking attitude | position, (b) represents the process from an unlocking attitude | position to a locking attitude | position, (c) is a locking attitude | position. Represents. It is the front view of the conventional latch lock, and is the figure which removed the cover member.

Hereinafter, embodiments of the present invention will be described in detail.
In the following description, unless otherwise specified, the vertical positional relationship will be described based on the normal installation position (FIG. 1).

The latch lock 1 of 1st Embodiment of this invention is attached to the end surface of the free end side of a door with a vertical attitude | position like a normal latch lock like FIG.
Moreover, the latch lock 1 of 1st Embodiment of this invention incorporates the opening / closing mechanism (driving mechanism) which contributes to opening / closing of a door, and the locking / unlocking mechanism (driving mechanism) which contributes to locking / unlocking of a door. That is, the latch lock 1 is similar to the conventional latch lock, in addition to the operation (opening / closing operation) in which the latch bolt 3 (door engagement piece) protrudes and retracts from the front 9 with the rotation of the handle, An operation (locking / unlocking operation) for switching between an unlocking posture in which 3 freely moves and a locking posture in which the movement of the latch bolt 3 is restricted is possible.

  As shown in FIG. 3, the latch lock 1 includes a lock case 2, a latch bolt 3, a hub member 5, a compression spring 6, an auxiliary transmission member 7, a locking member 8, and a front 9.

2 and 3, the lock case 2 is formed of a first lock case 10 and a second lock case 11, and the first lock case 10 and the second lock case 11 are integrally formed. ing.
Both the first lock case 10 and the second lock case 11 are made of resin and are formed by injection molding. Specifically, the first lock case 10 and the second lock case 11 are made of polyacetal (POM).

  As shown in FIG. 5, the first lock case 10 has a substantially rectangular main body 15, a front mounting portion 16 erected from the front side of the main body 15, and a rear surface erected from the rear side. It has the side standing wall part 17, the upper surface side standing wall part 18 erected from the upper surface side, and the lower surface side standing wall part 19 erected from the lower surface side.

  The main body 15 is provided with a plurality of escape holes 22 and 23 as shown in FIGS. Specifically, an escape hole 22 is provided in the vicinity of the connection portion between the main body 15 and the rear side standing wall portion 17, and an escape hole 23 is provided in the vicinity of the first guide portion 50 described later.

  The front attachment part 16 is a part to which the front 9 is attached as shown in FIG.

As shown in FIGS. 5 and 6, the rear-side standing wall portion 17 is a portion facing the front mounting portion 16 in the front-rear direction l and has a plurality of first engaging portions 20. The rear surface side standing wall portion 17 of the present embodiment has two first engaging portions 20 (20a, 20b).
The first engaging portion 20 is a portion that can be engaged with second engaging portions 91 and 92 (see FIG. 7) of the second lock case 11 described later, and is a pair. Specifically, the first engagement portion 20 is a protrusion (engagement piece) having a substantially triangular cross section as shown in FIG.
The first engaging portions 20a and 20b are arranged at a predetermined interval. The first engaging portions 20a and 20b of the present embodiment are located in the vicinity of both end portions in the vertical direction h (vertical direction) of the rear side standing wall portion 17. That is, one first engagement portion 20 a is located in the vicinity of the upper surface side standing wall portion 18, and the other first engagement portion 20 b is located in the vicinity of the lower surface side standing wall portion 19.
Further, the first engagement portion 20 is located at one end portion (the end portion on the second lock case 11 side) in the left-right direction w (lateral direction) of the rear surface side standing wall portion 17. And the 1st engaging part 20 inclines below as it goes to the front end side (2nd lock case 11 side) from the center side of the rear surface side standing wall part 17. As shown in FIG.

Moreover, the rear surface side standing wall part 17 has the protrusion part 21 which protruded toward the inner side (space 96 side) of the 1st lock case 10 like FIG.
The protrusion 21 is a protrusion that extends in the vertical direction h, and is a part that forms one engagement portion integrally with the protrusion 83 (see FIG. 7) of the second lock case 11. The protrusion 21 can be engaged with one locking engagement piece 78 (see FIG. 3) of the locking insertion member 71 during locking.

  As shown in FIG. 5, the rear-side standing wall portion 17 is provided with a fixing hole 32 that can be fitted to the fixing protrusion 88 (see FIG. 7) of the second lock case 11. The fixing hole 32 is a bottomed hole extending from the front end surface in the protruding direction of the rear surface side standing wall portion 17 toward the base end side (main body portion 15 side).

The upper surface side standing wall portion 18 has a first engagement portion 25 as shown in FIG. The first engagement portion 25 is a pair of portions that can be engaged with a second engagement portion 93 (see FIG. 7) of the second lock case 11 described later. Specifically, the first engaging portion 25 is a protrusion whose longitudinal section has a substantially triangular shape.
The first engaging portion 25 is located at an intermediate portion in the front-rear direction l. Specifically, the first engagement portion 25 is located closer to the front attachment portion 16 than the center in the front-rear direction l. More specifically, the first engaging portion 25 is provided in a region within 1/3 of the length of the upper surface side standing wall portion 18 in the front-rear direction 1 from the connection portion of the upper surface side standing wall portion 18 with the front mounting portion 16. It has been.
The first engaging portion 25 is located at one end portion (the second lock case 11 side end portion) of the upper surface side standing wall portion 18 in the left-right direction w (lateral direction). And the 1st engaging part 25 inclines below as it goes to the front end side (2nd lock case 11 side) from the center side of the upper surface side standing wall part 18. As shown in FIG.

The lower surface side standing wall part 19 has the 1st engaging part 26 like FIG. 5, FIG. The first engaging portion 26 is a portion that can be engaged with a second engaging portion 94 (see FIG. 7) of the second lock case 11 to be described later and is a pair. Specifically, the first engaging portion 26 is a protrusion having a substantially triangular shape in longitudinal section, like the first engaging portion 25 of the upper surface side standing wall portion 18.
The first engaging portion 26 is provided at a position corresponding to the first engaging portion 25 and the vertical direction h. That is, the first engaging portion 26 is located at an intermediate portion in the front-rear direction l. Specifically, the first engagement portion 26 is located closer to the front attachment portion 16 than the center in the front-rear direction l. More specifically, the first engagement portion 26 is located on the lower surface side standing wall portion 19. It is provided in a region within 1/3 of the length in the front-rear direction l of the lower surface side standing wall portion 19 from the connection site with the front mounting portion 16.
The first engaging portion 26 is located at one end portion (the second lock case 11 side end portion) of the lower surface side standing wall portion 19 in the left-right direction w (lateral direction). The first engaging portion 26 is inclined downward from the center side of the lower surface side standing wall portion 19 toward the distal end side (second lock case 11 side).

When attention is paid to the inside of the first lock case 10, the first lock case 10 has a latch bolt accommodating portion 35 that forms a withdrawal path of the latch bolt 3 as shown in FIGS. The latch bolt housing portion 35 is a frame having a substantially “U” cross-sectional shape, and is connected to the front mounting portion 16. That is, the latch bolt accommodating portion 35 forms an accommodating space 40 that can accommodate most of the latch bolt 3. The accommodation space 40 is a space surrounded by each of an upper standing wall portion 37, a lower standing wall portion 38, and a rear standing wall portion 39, which are wall portions erected from the body portion 15.
The latch bolt housing part 35 is located in the center of the first lock case 10 in the vertical direction h. Further, the latch bolt accommodating portion 35 extends to substantially the center in the front-rear direction l.

As shown in FIGS. 5 and 6, the upper standing wall portion 37 is connected to a state maintaining portion 36 (elastic member) that maintains the posture of the locking hub member 70 of the locking member 8 during unlocking and locking. . Specifically, the state maintaining portion 36 is a part of the upper standing wall portion 37 and is connected to a portion (fixed portion 14) on the rear side of the upper rib 30 described later.
As shown in FIG. 5, the state maintaining unit 36 is a leaf spring formed by bending a single plate-like body a plurality of times, and has a wave shape when viewed from the front. That is, the state maintaining unit 36 has a shape in which a single plate-like body is alternately folded back in a substantially “U” shape in an obliquely upward direction.

The width w (lateral length) of the state maintaining portion 36 is smaller than the width (lateral length) of the upper standing wall portion 37 and is supported in a cantilever manner with respect to the upper standing wall portion 37.
Further, the width w (the length in the horizontal direction) of the state maintaining unit 36 is directed in a direction substantially coincident with the thickness direction w of the lock case 2. In the present embodiment, the width w of the state maintaining unit 36 faces the direction that matches the thickness direction w of the lock case 2.

On the free end side of the state maintaining portion 36 (the end portion on the opposite side to the fixed portion 14 that is the connection site of the upper standing wall portion 37), the transmission portion connectable with the connection portion 73 (see FIG. 9) of the locking hub member 70. 34 (free part). The transmission unit 34 is a columnar projection that protrudes outward in the lateral direction w from the tip of the state maintaining unit 36.
The entire state maintaining unit 36 can be deformed in a direction in which the linear distance between the fixed unit 14 and the transmission unit 34 expands and contracts. Specifically, the state maintaining unit 36 has a biasing force directed obliquely upward when the latch lock is assembled. This urging force includes a component of a vertical component (vertical component) and a component of a horizontal component (front-rear direction).

Turning to the lower standing wall portion 38, the lower standing wall portion 38 has an overhanging portion 49 projecting rearward from the middle portion of the rear standing wall portion 39 as shown in FIG. A first guide portion 50 that guides a part of the hub member 5 to the outside in the lateral direction w (outside of the first lock case 10) is formed at the end portion of the overhang portion 49 in the overhang direction.
Specifically, the first guide portion 50 is a portion that guides one hub protruding piece 56 (see FIG. 9) of the hub member 5 to the escape hole 23 of the main body portion 15. More specifically, the first guide portion 50 is a protrusion having a tapered surface as shown in FIG. 5 and has a substantially triangular cross section. It is inclined downward from the inner side (second lock case 11 side) to the outer side (main body part 15 side). And the escape hole 23 is located on the extension of the inclined surface of the 1st guidance | induction part 50. FIG.

  As shown in FIG. 5, the rear vertical wall 39 has a notch 45 through which the shaft 44 of the latch body 41 of the latch bolt 3 can be inserted. The cutout 45 is a “U” -shaped cutout when seen in a plan view.

As shown in FIG. 5, the first lock case 10 includes a plurality of ribs 27 protruding from the main body portion 15 toward the main body portion 80 side of the second lock case 11. In the present embodiment, a plurality of ribs 27 extending in a direction perpendicular to the inner surface of the main body portion 15 (lateral direction w) are provided.
Specifically, the rib 27 includes a vertical rib 28 extending in the vertical direction h and a front / rear rib 29 extending in the front / rear direction l.

  As shown in FIG. 5, the upper and lower ribs 28 vertically cut the first lock case 10 with the latch bolt accommodating portion 35 interposed therebetween. That is, the upper and lower ribs 28 are formed of an upper rib 30 that connects the upper standing wall portion 18 to the upper standing wall portion 37 and a lower rib 31 that connects the lower standing wall portion 19 and the lower standing wall portion 38. The upper rib 30 is connected to a portion on the opposite side of the first engaging portion 25 in the inner and outer directions (the member thickness direction of the upper surface side standing wall portion 18). The lower rib 31 is connected to the first engaging portion 26 and a portion on the opposite side in the inner and outer directions. An attachment portion 24 to which the compression spring 6 can be attached is provided on the rear surface of the lower rib 31.

  The front and rear ribs 29 are ribs extending so as to connect the front mounting portion 16 and the upper and lower ribs 28. The front and rear ribs 29 are connected to intermediate portions of the upper rib 30 and the lower rib 31, respectively. Specifically, the front and rear ribs 29 are located on the inner side (latch bolt housing portion 35 side) than the center of the upper rib 30 and the lower rib 31.

As shown in FIG. 5, the first lock case 10 has a transmission guide groove 51 that regulates the moving direction of the transmission shaft portion 66 of the auxiliary transmission member 7. The transmission guide groove 51 faces obliquely upward from the front to the rear.
The transmission guide groove 51 is located in the approximate center between the rear vertical wall portion 39 and the rear side vertical wall portion 17 in the front-rear direction l, and is somewhat the same height as the upper vertical wall portion 37 in the vertical direction h. It is formed at a high position.
Further, the first lock case 10 is formed with a raised portion 33 that is raised from the main body portion 15 along the upper edge of the transmission guide groove 51.
The raised portion 33 is a portion that comes into contact with the connection portion 73 of the locking hub member 70 in the unlocked state, and is a portion that restricts the movement of the locking hub member 70.

  Moreover, the 1st lock case 10 has the locking guide groove | channel 52 which regulates the moving direction of the locking projection part 76 (refer FIG. 9) of the locking insertion member 71 like FIG. The locking guide groove 52 extends in the up-down direction h, and extends substantially from the height of the upper standing wall portion 37 to the height of the latch bolt 3.

When the eyes are moved to the second lock case 11, the second lock case 11 has a substantially square-shaped main body portion 80 and a rear side standing wall portion 81 standing from the rear side as shown in FIG. Yes.
The main body portion 80 is provided with a standing portion 82 that is erected from the inner surface of the main body portion 80 at a position corresponding to the protruding portion 49 (see FIG. 5) of the first lock case 10 during assembly.
As shown in FIG. 8, a second guiding portion 90 that guides a part of the hub member 5 outward is formed at the rear end of the standing portion 82. Specifically, the second guide portion 90 is a portion that guides one hub protruding piece 57 (see FIG. 3) of the hub member 5 to the escape hole 85 of the main body portion 80. More specifically, the second guiding portion 90 is a protrusion having a tapered surface, and has a substantially triangular cross section. The second guiding portion 90 is inclined downward from the inner side (the first lock case 10 side) toward the outer side. And the escape hole 85 is located on the extension of the inclined surface of the 2nd guidance | induction part 90. As shown in FIG.

  The main body 80 has second engagement portions 91, 92, 93, 94 that can be engaged with the first engagement portions 20a, 20b, 25, 26 of the first lock case 10 as shown in FIG. ing. The second engaging portions 91, 92, 93, 94 are portions that can be engaged so as to individually surround the first engaging portions 20 a, 20 b, 25, 26.

Moreover, the rear surface side standing wall portion 81 has a protruding portion 83 that protrudes toward the inside (front) of the second lock case 11 as shown in FIG. 7.
The protrusion 83 is a protrusion extending in the vertical direction, and is a part that forms one engagement portion integrally with the protrusion 21 of the first lock case 10. The protrusion 83 can be engaged with one locking engagement piece 79 (see FIG. 3) of the locking insertion member 71 during locking.
The rear surface side standing wall portion 81 is a projection extending in the lateral direction w as shown in FIG. 7 and can be fitted into the fixing hole 32 (see FIG. 5) of the rear surface side wall portion 17 of the first lock case 10. Is provided. That is, the fixed protrusion 88 is a columnar protrusion that protrudes in the same direction from the front end surface of the rear side standing wall portion 81 in the protruding direction.

As shown in FIGS. 7 and 8, the second lock case 11 has a transmission guide groove 86 that regulates the moving direction of the transmission shaft portion 67 of the auxiliary transmission member 7. The transmission guide groove 86 has the same shape as the transmission guide groove 51 of the first lock case 10 and faces obliquely upward. The transmission guide groove 86 is located at a position facing the transmission guide groove 51 of the first lock case 10 during assembly.
Further, the second lock case 11 is formed with a raised portion 95 raised from the main body portion 80 along the upper edge of the transmission guide groove 86. That is, the raised portion 95 is located at a position facing the raised portion 33 of the first lock case 10 when the latch lock 1 is assembled.

  The second lock case 11 has a locking guide groove 87 that regulates the moving direction of the locking projection 77 of the locking insertion member 71. The locking guide groove 87 has the same shape as the locking guide groove 52 of the first lock case 10 and extends in the vertical direction h. The locking guide groove 87 is located at a position facing the locking guide groove 52 (see FIG. 6) of the first lock case 10 during assembly.

  The body portion 80 is provided with a plurality of escape holes 84 and 85 as shown in FIGS. Specifically, an escape hole 84 is provided in the vicinity of the connection portion between the main body 80 and the rear side standing wall 81 as shown in FIG. 7, and the escape hole is provided in the vicinity of the second guide portion 90 as shown in FIG. 85 is provided.

  Turning to the latch bolt 3, the latch bolt 3 is a known latch bolt, and is formed by a latch body 41 and a torsion spring 42 as shown in FIG.

The hub member 5 is a power transmission member that moves the latch bolt 3 in accordance with the movement of the handle. That is, it is a member that converts the rotational force received from the handle into the drive force of the latch bolt 3.
As shown in FIG. 3, the hub member 5 has a handle insertion hole 55 into which a shaft portion of the handle can be inserted, and is rotatable in the circumferential direction with the handle insertion hole 55 as a rotation axis.

As shown in FIGS. 3 and 9, the hub member 5 includes a receiving portion 60 that receives the urging force of the compression spring 6 and arm portions 58 and 59 that transmit the force to the auxiliary transmission member 7.
In the vicinity of the receiving portion 60, there are hub protruding pieces 56 and 57 provided so as to sandwich the receiving portion 60 therebetween. Specifically, the hub protruding pieces 56 and 57 are parallel to each other with a predetermined interval, and the receiving portion 60 is located inside thereof. The hub member 5 is capable of inserting the tip of the compression spring 6 between the hub protruding pieces 56 and 57.
The arm portions 58 and 59 protrude in a direction away from the handle insertion hole 55, and are in a position shifted in the circumferential direction with respect to the hub protruding pieces 56 and 57.
The arm portions 58 and 59 are parallel to each other at a predetermined interval in the width direction (left and right direction), and the shaft portion 44 (see FIG. 3) of the latch bolt 3 can be inserted between the arm portions 58 and 59. It has become.

  As shown in FIG. 3, the compression spring 6 is a known conical spring, and is a member that urges the receiving portion 60 of the hub member 5 in a direction away from the lower rib 31 during assembly.

As shown in FIGS. 3 and 9, the auxiliary transmission member 7 is a member that transmits the pressing force received from the arm portions 58 and 59 of the hub member 5 to the latch bolt 3.
The auxiliary transmission member 7 has a plurality of contact pieces 64 and 65 that can contact the seat plate 43 of the latch bolt 3. The contact pieces 64 and 65 are arranged at a predetermined interval in the width direction (lateral direction), and the shaft portion 44 of the latch bolt 3 can be inserted between the contact pieces 64 and 65.

Further, the auxiliary transmission member 7 has transmission shaft portions 66 and 67 projecting outward in the lateral direction as shown in FIGS. The transmission shaft portions 66 and 67 are cylindrical protrusions, are aligned on the same straight line in the lateral direction, and extend in directions away from each other.
The transmission shaft portion 66 can be inserted into the transmission guide groove 51 (see FIG. 5) of the first lock case 10, and the transmission shaft portion 67 can be inserted into the transmission guide groove 86 of the second lock case 11 (FIG. 7). Can be inserted).
Further, the transmission shaft portions 66 and 67 are located at positions opposite to the contact pieces 64 and 65 as shown in FIGS. Specifically, the transmission shaft portions 66 and 67 are provided in the vicinity of the lower end portion in the vertical direction of the auxiliary transmission member 7 on the basis of the unlocking posture described later, and the contact pieces 64 and 65 are the auxiliary transmission members 7. It is provided in the vicinity of the upper end portion.

As shown in FIGS. 3 and 9, the locking member 8 is formed of a locking hub member 70 (operation piece) and a locking insertion member 71 (fixing member).
The locking hub member 70 is a member that can be operated from the outside, and includes a key receiving portion 72 into which a key can be inserted, a connection portion 73 connected to the transmission portion 34 of the state maintaining portion 36, and a locking insertion member 71. It has a locking shaft portion 74 that can be pivotally supported.
Specifically, the connection part 73 is a hole into which the transmission part 34 of the state maintaining part 36 can be inserted.
The locking shaft portion 74 is a portion serving as a rotation shaft of the locking hub member 70 and is a columnar protrusion that can be inserted into the locking shaft hole 75 of the locking insertion member 71.
The connecting portion 73 and the locking shaft portion 74 are at positions shifted in the circumferential direction with the key receiving portion 72 as the center.

The locking insertion member 71 is a member that is interposed between the latch bolt 3 and the rear surface side wall portion 17 of the first lock case 10 during locking, and is a member that prevents the latch bolt 3 from retracting.
As shown in FIG. 9, the locking insertion member 71 includes a locking shaft hole 75, locking protrusions 76 and 77, and locking engagement pieces 78 and 79.

The locking shaft hole 75 is a hole into which the locking shaft portion 74 of the locking insertion member 71 can be inserted.
The locking protrusion 76 is a cylindrical protrusion that can be inserted into the locking guide groove 52 of the first lock case 10, and can slide within the locking guide groove 52.
The locking projection 77 is a columnar projection that can be inserted into the locking guide groove 87 of the second lock case 11, and can slide in the locking guide groove 87.
The locking engagement pieces 78 and 79 are portions that enhance the integrity of the first lock case 10 and the second lock case 11 during locking. The locking engagement pieces 78 and 79 are arranged in parallel with a predetermined interval in the width direction, and the protruding portion 21 of the first lock case 10 and the protruding portion 83 of the second lock case 11 overlap with each other. It can be inserted in the state.

  As shown in FIG. 3, the front 9 is a known front and has a through hole 47 through which the head of the latch bolt 3 can be projected and retracted.

Then, the positional relationship of each member in each attitude | position of the latch lock 1 accompanying the opening / closing operation | movement of a door is demonstrated.
That is, the latch lock 1 in an operation (opening / closing operation) for switching between a posture in which the latch bolt 3 protrudes from the front 9 (hereinafter also referred to as a protruding posture) and a posture in which the latch bolt 3 is retracted from the front 9 (hereinafter also referred to as a retracted posture). The positional relationship of each member will be described.

First, for convenience of explanation, the positional relationship of the latch lock 1 (normal installation position) in the protruding posture will be described.
As shown in FIG. 2, the latch lock 1 has a front 9 attached to a front attachment portion 16.
When attention is paid to the opening / closing mechanism that contributes to the opening / closing of the door, the latch lock 1 has a compression spring 6 attached to the attachment portion 24 of the first lock case 10 as shown in FIG. 60 is urged rearward. That is, the hub member 5 is biased in the circumferential direction around the handle insertion hole 55, and the arm portions 58 and 59 press the rear surface of the rear vertical wall portion 39 forward. The arm portions 58 and 59 are in contact with the front surfaces of the contact pieces 64 and 65 of the auxiliary transmission member 7. Further, the transmission shaft portion 66 of the auxiliary transmission member 7 is inserted into the transmission guide groove 51 of the first lock case 10 as shown in FIG. On the other hand, the transmission shaft portion 67 of the auxiliary transmission member 7 is inserted into the transmission guide groove 86 of the second lock case 11 and is located at the lowest position.

On the latch bolt 3 side, the latch body 41 is pushed forward by the restoring force of the torsion spring 42 of the latch bolt 3 as shown in FIG. In the latch lock 1, the rear surfaces of the contact pieces 64 and 65 of the auxiliary transmission member 7 are pressed forward by the seat plate 43. That is, the contact pieces 64 and 65 of the auxiliary transmission member 7 are sandwiched in the front-rear direction by the seat plate 43 of the latch body 41 and the rear standing wall 39.
The latch lock 1 is inside the lock case 2, and a space 96 is formed between the seat plate 43 of the latch bolt 3 and the rear side standing wall portion 17. That is, a space 96 into which the latch body 41 can enter is formed behind the seat plate 43 of the latch bolt 3.

  Paying attention to the locking mechanism that contributes to locking, the transmission part 34 of the state maintaining part 36 is inserted into the connection part 73 of the locking hub member 70. As shown in FIG. 10, the state maintaining unit 36 presses the connecting portion 73 of the locking hub member 70 against the raised portion 33 of the first lock case 10. In other words, the state maintaining part 36 urges the connecting part 73 of the locking hub member 70 rearward, and the connecting part 73 of the locking hub member 70 is blocked by the raised part 33.

  The locking shaft portion 74 of the locking hub member 70 is inserted into the locking shaft hole 75 of the locking insertion member 71. The locking projection 76 of the locking insertion member 71 is inserted into the locking guide groove 52 of the first lock case 10 as shown in FIG. 11 and is located at the uppermost part of the locking guide groove 52. Similarly, the locking projection 77 is inserted into the locking guide groove 87 of the second lock case 11 and is located at the uppermost part of the locking guide groove 87.

Here, paying attention to the relationship between the first lock case 10 and the second lock case 11, the latch lock 1 is integrated by covering the first lock case 10 with the second lock case 11 as shown in FIG. . Specifically, the first engaging portions 20a, 20b, 25, and 26 of the first lock case 10 are connected to the second engaging portions 91, 92, 93, and 94 of the second lock case 11 as shown in FIG. Is engaged. The fixing projection 88 of the rear side standing wall portion 81 of the second lock case 11 is fitted into the fixing hole 32 of the rear side standing wall portion 17 of the first lock case 10.
Thus, in the latch lock 1, the first lock case 10 and the second lock case 11 made of resin are integrated without using a fastening element such as a screw. Therefore, it is inexpensive and can be easily assembled.

Subsequently, the handle is rotated to change the protruding posture to the retracted posture.
Specifically, the hub member 5 is rotated in the circumferential direction around the handle insertion hole 55 by the rotation of the handle.
At this time, the receiving portion 60 of the hub member 5 presses the compression spring 6 forward as shown in FIG. 12, and the compression spring 6 is in a contracted state. The arm portions 58 and 59 press the front surfaces of the contact pieces 64 and 65 of the auxiliary transmission member 7.

  The auxiliary transmission member 7 receives the pressing of the arm portions 58 and 59 accompanying the rotation of the hub member 5 and transmits the transmission guide groove 51 of the first lock case 10 and the second lock case 11 as shown in FIG. It moves obliquely upward along the guide groove 86.

When the transmission shaft portions 66 and 67 are moved to the uppermost portions of the transmission guide groove 51 and the transmission guide groove 86 after the transmission shaft portions 66 and 67 are moved to the auxiliary transmission member 7, the transmission guide groove 51 is further applied. , 86 rotate in the circumferential direction around the transmission shaft portions 66, 67.
The rotation direction at this time is opposite to the rotation direction of the hub member 5. As the auxiliary transmission member 7 rotates, the seat plate 43 of the latch bolt 3 is pressed backward by the contact pieces 64 and 65. Therefore, as shown in FIG. 12, the latch main body 41 retracts against the urging force of the torsion spring 42, and the latch lock 1 assumes the retracted posture.

  In the process of changing from the protruding posture to the retracted posture, the hub protruding piece 56 of the hub member 5 is guided in the direction of approaching the escape hole 23 along the wall surface of the first guide portion 50 of the first lock case 10 as shown in FIG. It is burned. On the other hand, the hub protruding piece 57 of the hub member 5 is guided in the direction approaching the escape hole 85 along the wall surface of the second guide portion 90 of the second lock case 11. In other words, the escape holes 23 and 85 alleviate the spreading force in the outward direction of the tip portions of the hub protruding pieces 56 and 57 of the hub member 5. Further, as the hub projecting pieces 56 and 57 of the hub member 5 are guided to the escape holes 23 and 85, the first guide portion 50 and the second guide portion 90 are brought closer to each other by the hub projecting pieces 56 and 57 of the hub member 5. It is pressed by. That is, in the retracted position, the latch lock 1 has the first guide portion 50 and the second guide portion 90 sandwiched between the hub protruding pieces 56 and 57 of the hub member 5 as shown in FIG. The integrated strength of 10 and the second lock case 11 is reinforced.

  Since the changing operation from the retracted posture to the protruding posture is the same except that it is a reverse operation, the description thereof will be omitted.

Then, the positional relationship of each member in each attitude | position of the latch lock 1 accompanying the key opening / closing operation | movement is demonstrated.
For convenience of explanation, the positional relationship of each member accompanying the operation of switching from the unlocked state to the locked state will be described.

  The latch lock 1 in the unlocked state shown in FIG. 10 is in the same state as the latch lock 1 in the protruding position described above, and thus the description thereof is omitted.

The key is inserted into the key receiving portion 72 of the unlocked latch lock 1 and rotated to lock.
At this time, as the key rotates, the locking hub member 70 rotates in the circumferential direction around the key receiving portion 72. That is, the locking hub member 70 rotates from the locking angle (FIG. 15) to the unlocking angle (FIG. 17).
When attention is paid to the connecting portion 73 side of the locking hub member 70, the connecting portion 73 rotates in the circumferential direction around the key receiving portion 72, and a part of the connecting portion 73 is the upper surface side wall portion 18 of the first lock case 10. (FIG. 15 → FIG. 17).
Further, as the connecting portion 73 moves, the state maintaining portion 36 of the first lock case 10 rotates in the circumferential direction around the connecting portion with the upper standing wall portion 37, and the urging direction is changed.
That is, in the unlocked state, the state maintaining unit 36 urges the connecting portion 73 in a direction to press the raised portion 33 of the first lock case 10. However, in the locked state, the state maintaining portion 36 pushes the connecting portion 73 to the first lock case 10. It is urging | biasing in the direction pressed against the upper surface side standing wall part 18.

When attention is paid to the locking shaft portion 74, the locking shaft portion 74 rotates in the circumferential direction around the key receiving portion 72, and as shown in FIG. 16, the locking shaft portion 74 is on the center side (latch bolt 3 side). Moving.
With the movement of the locking shaft portion 74, the locking insertion member 71 has the locking projections 76 and 77 formed in the locking guide groove 52 of the first lock case 10 and the locking guide groove 87 of the second lock case 11. It is guided and moves downward as shown in FIG. Then, the locking insertion member 71 enters the space 96 located behind the latch bolt 3.
Therefore, the latch main body 41 cannot move into the space 96 due to the presence of the locking insertion member 71, and the latch bolt 3 cannot be retracted from the front 9.

Further, at this time, as shown in FIG. 18, the protruding portions 21 and 83 enter between the locking engagement pieces 78 and 79, and the protruding portions 21 and 83 are inserted into the locking engagement pieces 78 and 79. 79. That is, the integrated strength of the first lock case 10 and the second lock case 11 is reinforced by the locking engagement pieces 78 and 79 of the locking insertion member 71.
Further, the locking engagement piece 78 is guided to the escape hole 22 along the wall surface of the protruding portion 21 of the first lock case 10, and the spreading force in the outward direction of the distal end portion of the locking engagement piece 78 is exerted. It has been eased. The locking engagement piece 79 is guided to the relief hole 85 along the wall surface of the protruding portion 83 of the second lock case 11, and the outward spreading force of the distal end portion of the locking engagement piece 79 is reduced. ing.

The relationship of the force around the state maintaining unit 36 when switching from the unlocked posture to the locked posture will be described.
In the unlocked posture, the state maintaining unit 36 has a biasing force working obliquely upward as shown in FIG. That is, the urging force of the state maintaining unit 36 has a component force Fy of the vertical component (vertical component) and a component force Fx of the front-rear component (horizontal component). The urging force F1 of the state maintaining unit 36 in the unlocked posture is such that the component force Fx of the front-rear direction component is larger than the component force Fy of the vertical component. In other words, a force that urges the connecting portion 73 of the locking hub member 70 backward acts greatly, and the locking hub member 70 is difficult to rotate forward about the key receiving portion 72. Therefore, the latch lock 1 is not changed from the unlocked posture unless an external force is applied.

  When switching from the unlocked posture to the locked posture, the state maintaining unit 36 applies an external force (the rotational force of the locking hub member 70), but until the state maintaining unit 36 assumes a predetermined posture, the locking is performed. The hub member 70 is difficult to rotate forward about the key receiving portion 72. When the state maintaining portion 36 approaches a locking posture beyond a predetermined posture, the locking hub member 70 is moved to the key receiving portion 72. It becomes easy to rotate forward about 72. More specifically, the angle of the state maintaining unit 36 changes from the unlocking posture toward the locking posture, and the force relationship between the component force Fy of the vertical component of the urging force of the state maintaining unit 36 and the component force Fx of the front-rear direction component is It will change. Then, when the component force Fy of the vertical component of the urging force F2 of the state maintaining unit 36 and the component force Fx of the front-rear component are equal to each other as shown in FIG. The force relationship between the component force Fy and the component force Fx of the front-rear direction component is reversed, and the urging force acts in the direction of switching to the locked posture. That is, the latch lock 1 moves from the unlocked posture to the locked posture through the thought point where the state maintaining unit 36 is most compressed.

  And when it becomes a locking posture, the urging | biasing force works diagonally upward as shown in FIG.19 (c). That is, the urging force of the state maintaining unit 36 has a component force Fy of the vertical component and a component force Fx of the front-rear component. In the urging force F3 of the state maintaining unit 36 in the locked posture, the component force Fy in the vertical direction component is larger than the component force Fx in the front-rear direction component. In other words, the force that urges the connecting portion 73 of the locking hub member 70 upward acts greatly, and the locking hub member 70 is less likely to rotate backward about the key receiving portion 72. Therefore, the latch lock 1 is not changed from the locked posture unless an external force is applied.

  According to the latch lock 1 of the present invention, since the lock case 2 and the state maintaining portion 36 are made of resin and are integrally formed, they are formed at a lower cost than a conventional metal lock case. be able to. In addition, the number of parts can be reduced, and it is easy to assemble without being detached from the lock case.

  According to the latch lock 1 of the present invention, the rotational force of the hub member 5 is transmitted to the latch bolt 3 via the auxiliary transmission member 7, and the rotation direction of the hub member 5 and the rotation direction of the auxiliary transmission member 7 are reversed. As a result, the rotation angle of the handle is successfully reduced as compared with the case where the auxiliary transmission member 7 is not interposed. Therefore, it is possible to easily open and close the door.

  In the above-described embodiment, the rotational force of the hub member 5 is indirectly transmitted to the latch bolt 3 via the auxiliary transmission member 7, but the present invention is not limited to this, and is directly from the hub member 5. May be transmitted to the latch bolt 3.

  In the above-described embodiment, the state maintaining part 36 is connected to a part of the upper standing wall part 37, but the present invention is not limited to this, and is formed integrally with the lock case 2 and used for locking. It is only necessary that the position of the insertion member 71 can be fixed. For example, the state maintaining part 36 may be connected to a part of the upper surface side standing wall part 18.

  In the above-described embodiment, the lock case 2 and the locking insertion member 71 are engaged in the locking posture. However, the present invention is not limited to this, and the lock case 2 and the locking member in the unlocking posture. The insertion member 71 may be engaged.

  In the above-described embodiment, the lock case 2 and the hub member 5 are engaged in the retracted posture. However, the present invention is not limited to this, and the lock case 2 and the hub member 5 are in the protruding posture. It is good also as a structure to engage.

  In the above-described embodiment, the example in which the state maintaining unit 36 is adapted to the latch bolt driving mechanism has been described. However, the present invention is not limited to this, and the state maintaining unit may be a dead bolt driving mechanism or push-pull. You may adapt to the drive mechanism of a lock, and the drive mechanism of a sickle lock.

1 Latch lock (lock)
2 Lock case 3 Latch bolt (engagement piece for door)
8 Locking member 10 1st lock case 11 2nd lock case 20, 20a, 20b, 25, 26 1st engaging part 21,83 Protrusion part 27 Rib 34 Transmission part (free part)
36 State maintenance part (elastic member)
50 1st guide part (engagement piece)
56, 57 Hub protrusion 70 Locking hub member (operation piece)
71 Locking insertion member (fixing member)
78, 79 Locking engagement piece 22, 85 Relief hole (through hole)
90 Second guiding portion (engagement piece)
91, 92, 93, 94 Second engaging portion

Claims (9)

A lock attached to the door, comprising: a lock case; a door engagement piece that engages with another member to close the door; and a drive mechanism related to the operation of the door engagement piece. In the lock that includes a drive mechanism in the case and includes an elastic member in the drive mechanism,
The lock case is formed of resin,
One or a plurality of the elastic members are resin-made elastic members, which are formed integrally with the lock case and have a fixed portion joined to the lock case and a free portion separated from the lock case. And
The lock, wherein the free part is engaged with a member constituting the drive mechanism or the door engagement piece.   The resin elastic member is a leaf spring, and is formed in a posture in which the width direction thereof substantially coincides with the thickness direction of the lock case, and the whole is bent in a wave shape so that the fixed portion and the free portion The lock according to claim 1, wherein the lock is deformed in a direction in which a linear distance therebetween expands and contracts. It is a latch lock that moves the latch bolt in and out of the lock case in conjunction with the handle,
The drive mechanism includes a locking mechanism that can be locked by restricting the movement of the latch bolt,
The locking mechanism includes an operation piece that is operated from the outside, and a fixing member that is separate from or integral with the operation piece.
By moving the operation piece, the fixing member moves and / or changes its posture and appears and disappears between a part of the latch bolt and the lock case,
The free portion of the resin-made elastic member is directly or indirectly engaged with the operation piece or the fixing member and biased in a direction to maintain the posture of the operation piece or the fixing member. 2. The tablet according to 2. The operation piece can be rotated from the locking angle to the unlocking angle,
The free part of the elastic member made of resin is directly or indirectly engaged with the operation piece,
While the operation piece rotates from one side of the locking angle and the unlocking angle to the other side, the resin elastic member passes through a thought point where it is most compressed,
4. The lock according to claim 3, wherein the operation piece is biased so as to rotate to the other side by the elastic force of the resin elastic member after passing the thought point.   The lock according to any one of claims 1 to 4, wherein the lock case has a rib for reinforcing the rigidity of the lock case. The lock case is formed of a first lock case and a second lock case,
The first lock case has a first engaging portion formed integrally,
The second lock case has a second engaging portion formed integrally,
6. The first lock case and the second lock case are integrated by the engagement of the first engagement portion and the second engagement portion. 6. Tablets. By rotating the key, it is possible to switch between the unlocking posture where the latch bolt can be taken in and out and the locking posture where the latch bolt can be taken in and out,
The lock case is formed of a first lock case and a second lock case,
The first lock case and the second lock case both have protrusions, and are arranged in a state where the protrusions overlap with each other,
The fixing member has two locking engagement pieces arranged at a predetermined interval,
The locking engagement piece moves as the key rotates,
The lock according to any one of claims 3 to 6, wherein in the unlocked posture or the locked posture, the protrusion fits into the interval in a state of overlapping. By rotating the handle, the projecting posture in which the latch bolt protrudes from the lock case and the retracted posture in which the latch bolt is retracted into the lock case are switched.
The lock case is formed of a first lock case and a second lock case,
The first lock case and the second lock case both have engaging pieces,
It has a hub member that transmits the rotational force of the handle to the latch bolt,
The hub member has two hub projecting pieces arranged at a predetermined interval,
The hub member moves as the handle rotates,
The lock according to any one of claims 3 to 7, wherein in the protruding posture or the retracted posture, the engaging piece fits in the gap in a close state. The first lock case or the second lock case has a through hole in the vicinity of the engagement piece,
The engagement piece has a tapered inclined surface,
The lock according to claim 8, wherein the inclined surface abuts on the hub protruding piece and guides the hub protruding piece to the through hole when the posture is switched to the protruding posture or the retracted posture.

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