JP2011052526A - Inverted latch lock for door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inverted latch lock reducing a collision noise of a latch generated when the latch enters into a strike when opening/closing a door. <P>SOLUTION: The inverted latch lock 1 for the door is equipped with: the latch 4 which is guided and supported so that a locking box component 3 such as a latch guard 5 inverses and slidably advances/retreats its both ends; and a latch spring 7 which is provided to the latch 4, and causes thrust and inverse forces for advancing and sliding the latch 4 toward the strike. The inverted latch lock 1 has a moving speed deceleration means for reducing a moving speed of the latch 4 in the latch 4 or the locking box components 3, 5. The moving speed deceleration means provided in the latch 4 is constituted of: a spring receiving member 6 which is received in the latch 4 so as to allow its relative displacement, and supports one end of the latch spring 7; and frictional resistance causing mechanisms 5, 6, 8, 9 which are provided in the spring receiving member 6, and constantly apply a biasing force to the locking box components 3, 5, thereby causing the frictional resistance with the locking box components. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a “door reversing latch lock” employed in a push-pull latch locking device having a latch that slides in a lock box so as to be reversible, and each time the door is opened and closed, from the retracted position toward the strike. A reversing latch for the door that reduces and suppresses the impact sound that is generated when the latch that reverses and returns to a fixed position when it slides forward (projects) collides with the decorative panel of the door while maintaining the locking and unlocking operation reliably. Regarding locks.

  Conventionally, there are techniques described in Patent Documents 1 to 3 as techniques related to a reverse latch lock of a door type that includes a latch that performs a reversing (swinging) motion. These are provided with a latch spring having a strong spring force in order to cause the latch to slide and reverse in the strike direction reliably and quickly. However, in the techniques of Patent Documents 1 to 3 above, when the door is opened, the latch is swung against the urging force of the latch spring and once retracted into the lock box, and then reversed again to return to the fixed position (door Return to the fully latched or fully closed position). At this time, the latch collides with the decorative plate provided on the door and makes an abnormal sound (impact sound) when reversing. Also, when closing the open door, the latch receives the external force from the strike side without reversing and forcibly moves backward against the urging force of the latch spring into the lock box, that is, after being pushed in, the external force is When is unloaded, the latch suddenly slides forward and returns to the fixed position. At this time, the latch that slides forward by the spring force of the latch spring collides with the decorative plate and emits an impact sound. As a technique for improving the operation feeling at the time of opening and closing the door, for example, there is a technique of a reverse latch lock described in Patent Document 4. This forms a gap in the frame member (side wall of the latch guide) at the periphery of the decorative plate opening, thereby mitigating the impact at the time of the collision of the latch and causing a silent effect.

Japanese Patent Laid-Open No. 1-210583 Utility Model Registration No. 2513703 JP 2008-50864 A JP 2007-138515 A

  However, in the technique of the above-mentioned patent document 4, when performing a locking / unlocking operation at the time of opening / closing the door using a latch spring having a large biasing force, a passive silent structure that only forms a gap in the frame member However, the impact noise reduction effect of the latch has a certain limit, and there has been a problem in maintaining and improving the door opening / closing operation feeling.

  The present invention has been made in order to solve the above-described problems, and in the door opening / closing operation, the reversing speed (swinging speed) of the latch in the case of forward sliding while reversing, and the forward sliding from the retracted position. In this case, the moving speed, such as the forward sliding speed of the latch, is decelerated by aggressive moving speed reduction means that decelerates the biasing force of the latch spring and reduces the latch crashing into the door side decorative plate or latch guard. Thus, an object of the present invention is to provide an inverted latch lock for a door that can effectively reduce impact noise.

  (1) The present invention provides a latch that is guided and supported by a lock box component such as a latch guard so that both sides are reversed and moved forward and backward, and a thrust that is provided in the latch and that slides forward and backward toward the strike. In the reverse latch lock of the door provided with a latch spring for inducing reversal force, movement speed reduction means for reducing the movement speed of the latch is provided in the latch or the lock box component, Inverted latch lock. The lock box component refers to a casing that accommodates the inverted latch lock, and the “lock box component such as a latch guard” refers to the latch guard and the function of the latch guard substantially integrated with the casing itself. It is a concept including a casing formed by molding.

  According to the present invention, the reversing speed (rotational speed or swinging) of the latch that reverses so as to swing by the urging force of the latch spring when the door is opened / closed by the moving speed reduction means provided in the lock box component such as the latch or the latch guard. Speed), and the moving speed of advancing and sliding toward the strike from the retracted position are decelerated. For this reason, when the latch enters the strike, the impact force of the latch on the latch guard and / or the decorative plate can be reduced. Therefore, even when a door with a normal size or a large door with a large spring force of the latch spring is manufactured, the impact sound can be reduced well while ensuring a reliable locking and unlocking function, and quietness is achieved. It is possible to realize a high-quality door reversing latch lock with excellent quality.

  (2) According to the present invention, the moving speed reduction means provided in the latch is received in the latch so as to be relatively displaceable, and is provided in the spring receiving member that supports one end of the latch spring; The door according to (1), characterized in that the door is configured with a frictional resistance inducing mechanism that constantly applies an urging force to the lockbox component to induce a frictional resistance with the lockbox component. Inverted latch lock.

  According to the present invention, the inversion speed of the latch and the moving speed of the forward slide can be reduced by the frictional resistance inducing mechanism provided in the spring receiving member. Thereby, the impact sound (abnormal noise) in which the latch collides with the lock box component such as the latch guard and / or the decorative plate can be reduced.

  (3) In the present invention, the frictional resistance inducing mechanism is accommodated by a guide hole penetrating through the spring receiving member in a direction substantially perpendicular to the direction of the slide, and being contracted in the guide hole. The door-inverted latch lock according to (2), characterized in that the door is formed by a frictional resistance-inducing spring and a friction element provided at both ends of the frictional resistance-inducing spring and elastically contacting the lock box component. .

  According to the present invention, the frictional resistance inducing mechanism is composed of a frictional resistance inducing spring and friction elements provided at both ends thereof, and these friction elements are elastically contacted with the latch guard. For this reason, the moving speed when the latch slides forward from the retracted position and the reversing speed when the latch is reversed are decelerated by the frictional resistance between the friction element and the lock box component such as the latch guard. Thereby, the impact force when the latch collides with a lock box component such as a latch guard is reduced, and the impact noise (abnormal noise) can be reduced.

  (4) According to the present invention, the frictional resistance inducing mechanism includes two guide holes that are formed in series in the spring receiving member so as to be bored from both sides in a direction substantially perpendicular to the sliding direction, and are reduced in the two guide holes. (2), characterized in that it is formed by two frictional resistance-inducing springs that are housed in the form of two frictional resistance-inducing springs, and frictional elements that are provided at both ends of the frictional resistance-inducing springs and elastically contact with the lock box components. It is the reverse latch lock of the described door.

  According to the present invention, the frictional resistance inducing mechanism is composed of two guide holes, two frictional resistance inducing springs contracted in each guide hole, and a friction element provided at the ends of both springs. Both friction elements were brought into elastic contact with a lock box component such as a latch guard. The moving speed when the latch slides forward from the retracted position, and the reversing speed (rotational speed or swinging speed) when the latch reverses depends on the frictional resistance between the friction element and the lock box component such as the latch guard. Decelerated efficiently. As a result, the impact force when the latch collides with a lock box component such as a latch guard is reduced, and the impact noise (abnormal noise) can be reduced in substantially the same manner as the invention of (4) above.

  (5) In the present invention, the frictional resistance inducing mechanism is accommodated in the spring receiving member in two guide holes which are formed in series in both directions in a direction substantially perpendicular to the sliding direction, and are arranged in both the guide holes. The door inversion latch lock according to (2), characterized in that it is formed by two frictional resistance-inducing magnets repelling each other and slidingly contacting the lock box component.

  According to the present invention, instead of the two frictional resistance inducing springs in the invention of (4) above, the frictional resistance inducing mechanism is configured by replacing the two frictional resistance inducing magnets. Is slid in contact with a lock box component such as a latch guard. Therefore, the moving speed when the latch is slid forward from the retracted position and the reversing speed when the latch is reversed are decelerated by the frictional resistance between the magnet and the lock box component such as the latch guard. As a result, the impact force when the latch collides with a lock box component such as a latch guard can be reduced and the impact sound (abnormal noise) can be reduced in substantially the same manner as the inventions of (4) and (6) above. Become.

  (6) In the present invention, the moving speed reduction means provided in the latch is received by the latch so as to be relatively displaceable, and is opposed to a spring receiving member that supports one end of the latch spring, a base, and the base. A U-shaped shock absorbing leaf spring having legs bent into a pair of rearwardly extending legs, and both legs of the leaf spring receiving the base in the spring receiving member are always elastically contacted with the holes. The door inversion latch lock according to (1), further comprising a guide plate that is passed through and supported by the guide plate.

  According to the present invention, since the leg portion of the leaf spring that is bent and formed in a U-shape is penetrated so as to always slide in contact with the hole of the guide plate, the frictional resistance generated between the leaf spring and the guide plate, Due to the elastic deformation caused by the leaf spring itself, the sliding speed and reversal movement speed of the latch can be reduced, and the impact sound can be mitigated.

  (7) In the present invention, the moving speed reduction means provided in the latch may include a spring receiving member provided in the latch so as to be relatively displaceable, and a coil-like member that is contracted between the spring receiving member and the guide plate. The latch spring, a spring guide that passes through the inside of the latch spring 7, one end is coupled to the spring receiving member 6, the other end extends rearward and penetrates the guide plate, and the spring guide free end and the guide plate The door inversion latch lock according to (1), characterized in that the door is formed with an impact absorbing member interposed therebetween.

  According to the present invention, when the external force acting on the latch spring compressed when the latch slides backward is unloaded, the spring biasing force of the latch spring is instantaneously released. Therefore, the latch slides forward, and the shock absorbing member is subjected to elastic compression deformation by the free end portion of the spring guide. At this time, the speed of the sliding movement and the reverse movement of the latch is reduced by the impact force absorbing function of the impact absorbing member. This makes it possible to reduce the impact sound (abnormal noise) when the latch collides with lock box components such as a decorative plate and a latch guard.

  (8) In the present invention, the moving speed reduction means provided in the lock box component is received by the latch so as to be relatively displaceable, and a spring receiving member that supports one end of the latch spring; and the spring receiving member A latch guard that is slidable forward and backward, and a torsion spring that is provided between the latch guard and the lock box and constantly biases the latch guard to a retracted position. The biasing force of the torsion spring is forcibly biased to the retracted position against the biasing force of the latch spring, but when the forcing force for retracting and sliding the latch is unloaded, the latch spring advances and slides forward. After the latch collides with the latch guard, the latch guard moves forward together with the latch guard against the spring biasing force of the torsion spring. Is an inverted latch lock the door of the (1), wherein the configured.

  According to the present invention, the torsion spring having a spring constant larger than that of the latch spring is provided between the latch guard and the lock box. For this reason, the latch engages with the latch guard when the latch that is in a fixed position (the door fully opened position and / or the fully closed position) protrudes outward from the decorative plate when the door is opened, that is, in the middle of forward sliding. . Thereafter, the latch slides forward together with the latch guard against the spring biasing force of the torsion spring. As a result, the sliding speed of the latch is reduced by the torsion spring, and the kinetic energy is reduced. That is, the rotation speed of the latch and the sliding movement speed are reduced, and the latch can be prevented from colliding with lock box components such as a decorative plate, a lock box, and a latch guard. After the latch has fully protruded from the lock box, the latch guard automatically returns to the fixed position by the spring biasing force of the torsion spring.

  According to the present invention, the moving speed reduction means provided on the latch is pivotally supported so as to swing on the latch, and is configured to be able to come into cam contact with the strike. An inversion of a door comprising an impact absorbing spring provided between the latch and configured to compressively elastically deform the impact absorbing spring when the swing lever abuts on the strike. It is a latch lock.

  According to the present invention, the moving speed reduction means is configured by the pivot lever being pivotally supported by the latch via the shock absorbing spring. For this reason, when the door is closed, when the latch strikes the latch, the swing lever makes a collision while compressing and elastically deforming the shock absorbing spring, so that the moving speed and swing speed of the latch are reduced. As a result, the sound generated when the latch collides with the strike can be effectively reduced.

  According to the present invention, by providing the moving speed decelerating means, at the time of door opening / closing operation, the reversing speed (swinging speed or rotating speed) of the latch in the case of forward sliding while reversing, and the case of forward sliding from the reverse position The moving speed, such as the forward slide speed of the latch, is reduced by reducing the biasing force of the latch spring, reducing the impact force that collides with lock box components such as the decorative plate on the door side and latch guard, and the impact sound is effective. Can be reduced.

1 is a side view showing a schematic configuration of a reverse latch lock of a door, and (b) is a plan view of the first embodiment of the present invention. Similarly, it is the external appearance perspective view which decomposed | disassembled and showed the inversion latch lock of 1st Embodiment. Similarly, in relation to the latch of the first embodiment, (a) to (d) are four views thereof, and (e) is a cross-sectional view taken along line AA in (a). Similarly, it is an explanatory view showing the action of the latch in a plan view. (A) is a side view of an inverted latch lock, (b) is a plan view thereof, and (c) is an external perspective view showing assembly and disassembly of the inverted latch lock according to the second embodiment. According to the third embodiment, (a) is a front view of an inverted latch lock, (b) is a side view, (c) is a plan view, (d) is a three-view drawing of a spring receiving member, and (e) is a two-side view of a magnet. FIG. According to the fourth embodiment, (a) is a front view of an inverted latch lock, (b) is a side view, (c) is a plan view, (e) is a front view of a guide plate, (f) is a side view thereof, (g) is a four-sided view of the spring receiving member. In relation to the fifth embodiment, (a) is a front view of an inverted latch lock, (b) is a side view, and (c) is a plan view. Similarly, (a) is a side view of the latch, (b) is a plan view thereof, (c) is a side view of the spring receiving member, (d) is a plan view thereof, (e) is a front view, and (f) is a guide. The front view of a plate and (g) are the side views. Similarly, it is an operation explanatory view of the reverse latch lock, (a) is a side view thereof, (b) is a plan view. In connection with the sixth embodiment, (a) is a side view of an inverted latch lock, and (b) is a side view thereof. Similarly, (a) is a side view of the latch, (b) is a plan view thereof, (c) is a three-side view of the latch guard, and (d) is a two-side view of the torsion spring. Similarly, it is action explanatory drawing of the inversion latch lock | rock which concerns on 6th Embodiment. In relation to the seventh embodiment, (a) is an external perspective view showing the assembly and disassembly, (b) and (c) are external perspective views of the latch, and (d) is an operation explanatory view showing the relationship between the strike and the latch. is there. FIG. 10A is a side view showing a schematic configuration of an inverted latch lock of a door according to an eighth embodiment of the present invention, and FIG.

  Hereinafter, the reverse latch lock of the door which concerns on this embodiment is explained in full detail using drawing.

  <First Embodiment>

  1 to 4 relate to the first embodiment, FIG. 1 (a) is a side view showing a schematic configuration of a reverse latch lock of a door, FIG. 2 (b) is a plan view thereof, and FIG. 2 is an exploded view of the reverse latch lock. 3 is a perspective view, FIG. 3 is related to a latch, (a) to (d) are four views thereof, (e) is a sectional view taken along line AA in (a), and FIG. 4 is a latch. It is explanatory drawing which showed this effect | action with the top view.

  <Outline configuration of reverse latch lock>

  1 will be described. A decorative plate (front plate) 2 is provided on a door end surface (not shown) so as to face a strike provided on a door opening edge (not shown). ing. The reverse latch lock 1 is housed in the lock box 3 on the inner side (rear) of the decorative plate 2, and the latch 4, which is the main component of the reverse latch lock 1, moves forward along the latch guard 5 while reversing toward the strike. The reversing latch lock 1 is locked and unlocked by sliding and reversing sliding, that is, when the latch 4 moves in and out of the lock box 3.

  As shown in FIGS. 2 and 3, the inversion latch lock 1 includes a latch 4 having a substantially parallelogram shape in plan view, a pair of latch guards 5 fixed to the decorative plate 2, and a latch 4 in the recess 4 a of the latch 4. A spring receiving member 6 provided in a relatively displaceable manner, a coil spring (hereinafter referred to as “latch spring”) 7 contracted between the spring receiving member 6 and the latch guard 5, and a latch 4 on the spring receiving member 6. A guide hole 6a drilled through in a direction substantially perpendicular to the sliding direction, a coiled frictional resistance inducing spring 8 that is received in a contracted manner in the guide hole 6a, a guide hole 6a, and It consists of elements with two pins 9 as friction elements provided at both ends of the spring 8.

  <Latch>

  Each element which comprises the inversion latch lock 1 is demonstrated more concretely. Similarly to the latch described in the above-mentioned patent document, the latch 4 performs a push-pull handle operation (not shown), for example, so that a link (not shown) interlocked with the handle operation is engaged and disengaged on the upper and lower surfaces of the latch 4. When the handle is not operated, the link engages with the latch 4 and restrains the inversion (swing, rotation) and slide operation of the latch 4. When the steering wheel is operated, the link is released from the latch 4 to be in a free state, and the reverse operation from the state shown in FIG. 4B to the state shown in FIG. The door can be opened and closed.

  Further, on both upper and lower surfaces of the latch 4, projections 4b capable of cam contact with a later-described latch guard 5 are formed, and the latch 4 is reversed by the spring biasing force of the latch spring 7 with the projection 4b serving as a swing center. Has been made.

  <Latch spring>

  The latch spring 7 is disposed on the central axis L of the latch 4 and the spring receiving member 6 shown in FIG. As a result, the latch 4 is always advanced (extruded) in the strike direction, whereby a thrust and a reversal force are induced in the latch 4. Therefore, when the door is fully closed or fully opened, the latch 4 is an L-shaped stopper formed by the protrusion 4b on the latch guard 5, as shown in FIGS. 1 (a), 1 (b) and 4 (a). It slides forward to the position where it engages with 5b, and the maximum protrusion amount is defined.

  When the door is opened in the direction of arrow A when the door is completely closed as shown in FIG. 4A, the latch 4 receives an external force F from a strike (not shown). Thereby, the latch 4 is forcibly rotated as shown in FIG. 4B with the protrusion 4b as the center of swinging while slightly retreating to the right. As soon as the external force F no longer acts on the latch 4, the latch 4 immediately rotates due to the spring biasing force of the latch spring 7 with the projection 4 b as the center of oscillation and the acting portion 4 c forming a curved surface diagonally opposite to the projection 4 b as the action point. Receive. As a result, the latch 4 automatically returns to the state shown in FIG.

  Further, assuming that FIG. 4A is in a state in which the door is fully opened, when the door is closed, the inclined surface portion 4d of the latch 4 receives an external force from the strike. Therefore, the latch 4 is slid back to the right by the maximum retraction amount without swinging. After overcoming the strike, the external force is unloaded, so the latch 4 instantaneously advances and slides to the position where the projection 4b abuts against the stopper portion 5b by the spring biasing force of the latch spring 7, as shown in FIG. 4 (a). The door is locked in the state.

  <Latch guard>

  Each latch guard 5 is formed with two guide slits 5a extending in the sliding direction. The slider part 6b formed in the spring receiving member 6 mentioned later engages with the guide slit 5a so that sliding is possible.

  <Spring receiving member>

  Two slider portions 6b project from both side surfaces of the spring receiving member 6 and are assembled so as to be slidably engaged with the guide slit 5a. The spring receiving member 6 has a deformed hexagonal longitudinal cross-sectional shape with the left side sharpened so that the spring biasing force of the latch spring 7 is efficiently transmitted to the latch 4. In this way, by holding the latch 4 and both sides of the spring receiving member 6 with the latch guard 5, the spring receiving member 6 is guided by the guide slit 5a and slides. As a result, the latch 4 can slide integrally with the spring receiving member 6.

  <Movement speed reduction means provided in the latch>

  The “moving speed reduction means provided in the latch” is formed by the spring receiving member 6 and a frictional resistance inducing mechanism described later. Therefore, the spring biasing force of the latch spring 7 acting on the latch 4 is reduced by the frictional resistance caused by the frictional resistance inducing mechanism when the latch 4 is reversed or slid by the frictional resistance inducing mechanism provided in the spring receiving member 6. The movement speed (movement speed) of the latch 4 can be reduced.

  <Friction resistance mechanism>

  Further, the two pins 9 accommodated in the guide holes 6a of the spring receiving member 6 are always elastically contacted with the inner surface of the latch guard 5 by the frictional resistance-inducing springs 8, so that the frictional resistance is induced when the latch 4 is slid. It has become. Thus, a frictional resistance inducing mechanism is formed by the guide hole 6a, the frictional resistance inducing spring 8, and the pin 9.

  Thus, the reverse latch lock of the door of 1st Embodiment shown in FIG. 1 is comprised by assembling said each element.

  According to the first embodiment, as shown in FIG. 4A, when the door in the closed state is opened, the latch 4 receives the external force F from the strike, and the projection 4b is set as the swing center. Swing while sliding backward as shown in 4 (b). After overcoming the strike, the external force F is unloaded from the latch 4, and the latch 4 is automatically returned to the state shown in FIG. At this time, the protrusion 4b collides with the stopper portion 5b and the inclined surface portion 4e collides with the inheritance plate 2, but the frictional resistance between the latch guard 5 and the pin 8 forming the moving speed reduction means, that is, the frictional resistance inducing mechanism. As a result, the reversing speed of the latch 4 and the moving speed of sliding forward from the retracted position toward the strike are decelerated. For this reason, the impact force of the latch 4 on the latch guard 5 when the latch enters a strike or the like is alleviated, and the generation of impact noise (abnormal noise) can be suppressed.

  Second Embodiment

  5A is a side view of the reverse latch lock of the door in the second embodiment, FIG. 5B is a plan view thereof, and FIG. 5C is an exploded view of the latch 4 and the spring receiving member 6. FIG.

  The second embodiment is different from the first embodiment in terms of configuration in the first embodiment in which one guide hole 6a is formed in the spring receiving member 6 and one friction resistance-inducing spring 8 is formed therein. However, in the second embodiment, two guide holes 6c that are drilled from both sides in a direction substantially orthogonal to the sliding direction and arranged in series, and two friction resistances that are accommodated corresponding to the respective guide holes 6c are provided. The difference is only in that the trigger spring 8a is provided, and the other configurations are substantially the same.

  According to the second embodiment, the frictional resistance-inducing mechanism includes two guide holes 6c formed in the spring receiving member 6 having a substantially rectangular vertical cross-sectional shape, and two frictions that are contracted in the guide holes 6c. A resistance-inducing spring 8a and a pin 9 as a friction element provided at the ends of both springs 8a are configured so that both pins 9 are always in elastic contact with the latch guard 5.

  For this reason, the moving speed and the reverse moving speed of the latch 4 can be reduced by the frictional resistance generated between the pin 9 and the latch guard 5, and the latch 4 is connected to the latch guard 5 or the decorative plate 2 in substantially the same manner as in the first embodiment. The impact force is reduced and the impact sound (abnormal noise) can be reduced.

  <Third Embodiment>

  6A and 6B relate to the three views of the third embodiment, where FIG. 6A is a front view, FIG. 6B is a side view, FIG. 6C is a plan view, FIG. 1 is a cross-sectional view of a frictional resistance-inducing magnet (hereinafter referred to as “magnet”) 10. In FIG. 6, the illustration of the latch spring 7 is omitted.

  The frictional resistance inducing mechanism in the third embodiment is accommodated in two guide holes 6a, which are formed in series in the spring receiving member 6 in a direction substantially perpendicular to the sliding direction, from both sides, and in both guide holes 6a. And the two magnets 10 that are in sliding contact with the latch guard. Other configurations are substantially the same as those of the first embodiment.

  That is, in the third embodiment, instead of the two frictional resistance-inducing springs 8a in the second embodiment, the two magnets 10 are replaced and the magnetic repulsive force is used so that the magnets 10 are magnetically coupled to each other. Were arranged in series in such a way that they separated from each other. For this reason, the magnet 10 is brought into sliding contact with the lock box component 3 such as a latch guard, and the moving speed when the latch moves forward from the retracted position and the reversing speed when the latch is reversed can be reduced. Thereby, the impact force when the latch 4 collides with the lock box component 3 such as a latch guard is reduced, and the impact sound (abnormal noise) can be reduced. It should be noted that the lock box component 3 such as a latch guard is made of metal and the like, and the movement speed when the latch is advanced and slid from the retracted position by utilizing the force with which the magnet 10 and the lock box component 3 attract each other, and The inversion speed when the latch is inverted may be reduced.

  <Fourth embodiment>

  FIGS. 7A to 7C relate to the three surfaces of the fourth embodiment, FIG. 7A is a front view, FIG. 7B is a side view, FIG. 7C is a plan view, and FIG. 7D is a shock absorbing leaf spring. (E) is a front view of the guide plate, (f) is a side view thereof, and (g) is a four-view view of the spring guide. 7A to 7C, the illustration of the latch spring 7 is omitted.

  In the fourth embodiment, “the moving speed reduction means provided in the latch” is opposed to the spring receiving member 6 that is received by the latch 4 and supports one end of a latch spring (not shown), the base portion 11a, and the base portion 11a. A U-shaped shock absorbing leaf spring (hereinafter referred to as “plate spring”) 11 having a leg portion 11b bent into a pair of rearwardly extending dog-legs, and a plate having the base portion 11a received in the spring receiving member 6 A guide plate 12 is provided, which supports both the leg portions 11b of the spring 11 so as to penetrate through the holes 12a so as to be always in sliding contact therewith. Other configurations are substantially the same as those of the first embodiment.

  According to the fourth embodiment, the base portion 11 b of the leaf spring 11 is fitted into the spring receiving member 6. The leg part 11b of the leaf spring 11 bent in a U-shape is penetrated so as to be always in sliding contact with the hole 12a of the guide plate 12. For this reason, the frictional resistance generated between the leaf spring 11 and the guide plate 12 can reduce the sliding speed of the latch and the speed of the reversal motion, and can mitigate the impact sound.

  <Fifth Embodiment>

  A fifth embodiment shown in FIGS. 8 to 10 will be described. The fifth embodiment is different from the above embodiments only in that the rubber cushion 14b is used as one element of the "moving speed reduction means provided in the latch", and the other configurations are common.

  That is, the moving speed reduction means provided in the latch 4 in the fifth embodiment includes a spring receiving member 6 provided in the latch 4 so as to be relatively displaceable, and a coil contracted between the spring receiving member 6 and the guide plate 13. Latch spring 7, a rod-shaped spring guide 14 that passes through the guide plate 13 with one end passing through the inside of the latch spring 7, one end coupled to the spring receiving member 6, and the other end extending rearward, and a free end portion of the spring guide 14 And a shock absorbing member 15 interposed between the guide plate 13 and the guide plate 13.

  More specifically, the spring guide 14 implanted in the spring receiving member 6 penetrates the hole 13a of the guide plate 13, and a stopper portion 14a is formed at the free end thereof. A rubber cushion 14b as an impact absorbing member is interposed between the stopper portion 14a and the guide plate 13. The latch spring 7 is contracted between the spring receiving member 6 and the guide plate 13, and the guide plate 13 is slidably guided along the latch guard 5. As a result, the latch 4 is constantly biased in a strike direction (not shown) by the spring biasing force of the latch spring 7.

  Thus, when no external force is applied to the latch 4, that is, when the door is fully opened or fully closed, the latch 4 is slid to the maximum forward position shown in FIGS. 8B and 8C. It is in. When the door is opened and closed, an external force acts on the latch 4 from the strike side, and as shown in FIGS. 10 (a) and 10 (b), the latch 4 is compressed and elastically deformed, while the latch 4 is locked to the lock box 3, that is, the guide. The spring guide 14 is forcibly slid to the back of the plate 13, and the spring guide 14 extends by striking the guide plate 13 to the right.

  Therefore, according to the fifth embodiment, when the latch 4 pushed into the guide plate 13 as shown in FIG. 10 protrudes outward and slides forward as shown in FIG. 8, the rubber cushion 14b is Compression elastic deformation is received between the guide plate 13 and the stopper portion 14a. As a result, the rubber cushion 14b can smoothly decelerate the moving speed at which the latch 4 slides and the swinging speed at which it reversely moves, due to its shock absorbing function. As a result, the impact sound (abnormal noise) when the latch collides with the lock box component can be reduced.

  <Sixth Embodiment>

  A sixth embodiment shown in FIGS. 11 to 13 will be described. In contrast to the first to fifth embodiments characterized in that the sixth embodiment is characterized by "moving speed reduction means provided in the latch", the moving guard speed reduction means is provided in the latch guard (one element of the lock box component). The configuration is greatly different in this respect. That is, the latch guard 15 can slide forward and backward with respect to the guide plate 16 that is a lock box component, and the spring constant is larger than that of the latch spring 7 between the guide plate 16 and the lock box casing that is the lock box component. A large torsion spring 17 is provided. The feature is that the moving speed of the latch 4 is decelerated by the torsion spring 17 by the “moving speed reducing means provided in the lock box component”. This will be specifically described below.

  As shown in FIGS. 12A and 12B, the latch 4 has substantially the same structure as that of each of the above embodiments. The spring receiving member 6 shown in FIG. 13 is received in the concave portion 4a of the latch 4 so as to be relatively displaceable. A latch spring 7 is contracted between the spring receiving member 6 and the lock box 2.

  <Latch guard>

  As shown in FIG. 12C, the latch guard 15 is formed with slits 15a, which are arranged on both sides of the latch 4 so as to be sandwiched between the upper and lower objects. The latch 4 is incorporated so as to slide forward and backward along the slit 15a, and slides the spring receiving member 6 forward and backward. Further, the latch guard 15 is engaged with a latching portion 15b that latches one end of the torsion spring 17, a slider portion 15c that slides along a slit (not shown) formed in the guide plate 16, and the latch 4 and the decorative plate 2. A square stopper portion 15d is provided.

  <Torsion spring>

  One end of the torsion spring 17 is locked to the locking portion 15 b and the other end is locked to the lock box 3. The latch guard 15 is urged so as to always slide backward by the spring urging force of the torsion spring 17.

  <Guide plate>

  As shown in FIGS. 12C and 13A, the slider portion 15c of the latch guard 15 is slidably contacted with a slit (not shown) formed in the guide plate 16 provided in the lock box 3, and the latch guard 15 is The guide plate 16 can slide forward and backward.

  In this way, when each component shown in FIG. 12 is incorporated in the guide plate 16, a sixth embodiment having “moving speed reduction means” in the form using the torsion spring 17 is obtained as shown in FIG.

  According to the sixth embodiment, the torsion spring 17 having a spring constant larger than that of the latch spring 67 is provided between the latch guard 15 and the lock box 3. For this reason, the relative positional relationship between the latch 4 and the latch guard 15 is in the state shown in FIG. 13A at the fixed position where the door is in the fully open position or the fully closed position. When an external force from the strike acts on the latch 4 and is pushed in, the latch 4 slides back together with the spring receiving member 6 along the latch guard 15 against the spring biasing force of the latch spring 7 as shown in FIG. . When the external force acting on the latch 4 is unloaded, the latch 4 advances and slides along the latch guard 15 by the spring biasing force of the latch spring 7 as shown in FIG. 15 and the stopper portion 15d. After the engagement, the latch 4 is integrated with the latch guard 15 and slides forward against the spring biasing force of the torsion spring 17, and the tip of the latch guard 15 protrudes from the decorative plate 2 and abuts on the decorative plate. Stop. After the latch 4 has fully protruded, the latch 4 returns to the state shown in FIG. 13D, that is, the fixed position by the spring biasing force of the torsion spring 17.

  In this manner, the sliding speed and the reversing speed of the latch 4 caused by the latch spring 7 are caused by the spring biasing force of the torsion spring 17 until the latch 4 is brought into contact with the decorative plate 2 in a state where the latch 4 is integrated with the latch guard 15. Decelerated. As a result, the impact force when the latch collides with the decorative plate, the latch guard or the like is alleviated. Therefore, it is possible to smoothly reduce the impact sound caused by the latch 4 when the door is opened and closed.

  <Seventh embodiment>

  The seventh embodiment shown in FIG. 14 is characterized in that the latch 4 itself is provided with a swing lever 19 that is applied with a spring reaction force by a coil spring 18 as an impact absorbing spring.

  That is, in the “moving speed reduction means provided in the latch” in the seventh embodiment, the swing arm 19 capable of abutting on the strike 20 is pivotally attached to the latch 4 via the pin portion 19a. The swing arm 19 is disposed so as to be able to enter and exit from a groove 4h formed at substantially the center of the inclined surface portion 4d. A coil spring 18 is provided between the recess 4 f formed in the latch 4 and the swing arm 19. Thereby, the swing arm 19 swings (rotates) with the pin portion 19a as the swing center. At this time, the swing arm 19 can swing within the range of the angle θ as shown in FIG. In this way, as shown in FIG. 14A, the latch case 4g is attached to the latch 4, and the latch 4 having the appearance shown in FIGS. 14B and 14C is configured. The seventh embodiment can also be applied to the latch 4 of the first to sixth embodiments.

  According to the seventh embodiment, when the latch 4 abuts the strike 20 when the door is closed, the swing arm 19 abuts while compressing and elastically deforming the coil spring 18. Thereby, the impact with respect to strike 20 can be relieved because the coil spring 18 carries out the compression elastic deformation of the moving speed and reversal speed of the latch 4. FIG. As a result, the sound generated when the latch 4 collides with the strike 20 can be effectively reduced.

  <Eighth Embodiment>

  Next, an eighth embodiment shown in FIG. 15 will be described. In addition, the figure is related with 8th Embodiment of this invention, (a) is a side view which shows schematic structure of the inversion latch lock of a door, (b) is sectional drawing of the arrow direction shown to (a).

  The reverse latch lock according to the eighth embodiment includes a geared spring receiving member 26 and a frictional resistance inducing mechanism described later, instead of the moving speed reduction means of the reverse latch lock according to the first embodiment described above. Moving speed reduction means.

  The basic structure of the geared spring receiving member 26 is substantially the same as that of the spring receiving member 6 except that a gear 26a is formed on the upper surface of the geared spring receiving member 26 along the longitudinal direction. Is different.

  The frictional resistance inducing mechanism is rotatably accommodated in a box-shaped first guide portion 28 and second guide portion 30 fixed to the bottom surface of the lock box 3 and a cylindrical recess formed inside the first guide portion 28. The first pin 32 to be supported is fitted to one end of the first pin 32 so as to be slidable in the longitudinal direction, and the other end is rotatable to a cylindrical recess formed inside the second guide portion 30. A second pin 34 housed and supported by the first pin 32 and a spring member 36 that is contracted between the first pin 32 and the second pin 34 and biases the first pin 32 and the second pin 34 away from each other. And is configured.

  A gear 34 a that can mesh with a gear 26 a formed on the geared spring receiving member 26 is formed on the outer peripheral surface of the second pin 34 over the entire circumference. Although not shown, grease is applied to the sliding portion between the first guide portion 28 and the first pin 32 and the sliding portion between the second guide portion 30 and the second pin 34.

  In the inverted latch lock according to the eighth embodiment, when the latch 4 is in the return state shown in FIG. 4B, the geared spring receiving member 26 faces the direction of the frictional resistance inducing mechanism (right direction in the figure). Slide. When the geared spring receiving member 26 slides, the second pin 34 is rotationally driven via the gear 26a of the geared spring receiving member 26 and the gear 34a of the second pin 34, and is fitted to the second pin 34. The formed first pin 32 is also rotationally driven together with the second pin 34. At this time, since the first pin 32 and the second pin 34 are urged away from each other by the spring 36, the first pin 32 is always pressed against the inner surface of the first guide portion 28. The rotation is restricted by the portion 28, and the rotation of the second pin 34 is restricted by the second guide portion 30 while being constantly pressed against the inner surface of the second guide portion 30. In this way, by restricting the rotation of the second pin 34, the sliding speed of the spring receiving member 26 is reduced, and the moving speed and the reverse moving speed of the latch 4 can be reduced, almost the same as in the first embodiment. When the latch 4 collides with the latch guard 5 or the decorative plate 2 or the like, the impact force is reduced, and the impact sound (abnormal noise) can be reduced.

  The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit and technical idea of the present invention.

  For example, in each of the above embodiments, the latch spring 7 has been described as being contracted between the spring receiving member 6 and the latch guards 5 and 15. However, instead of the latch guard, any element that forms a lock box may be used. There is no limitation, and any lock box component may be used.

  Further, although the spring receiving member 6 is formed in a deformed hexagonal shape as in the first embodiment, this may be a rectangular shape as in the second embodiment, and conversely in the second embodiment or the like. The spring receiving member 6 may be in the form of a deformed hexagon.

  INDUSTRIAL APPLICABILITY The present invention is used for a “door reversal latch lock” employed in a push-pull latch lock device having a latch that slides in a lock box so as to be reversible.

1 Inverted latch lock 2 Decorative plate 3 Lock box 4 Latch 4a Concave
4b Protrusion 4c Acting part 4d Inclined surface part 4e Inclined surface part 5 Latch guard 5a Slit 6 Spring receiving member 6a Guide hole 6b Slider part 6c Guide hole 7 Latch spring 8, 8a Friction resistance inducing spring 9 Pin 10 Friction resistance inducing magnet 11 Shock absorbing plate Spring 12 Guide plate 13 Guide plate 14 Spring guide 14a Stopper part 14b Rubber cushion 15 Latch guard 15a Slit 15d Stopper part 16 Guide plate 17 Torsion spring 18 Coil spring 19 Oscillating arm 26 Geared spring receiving member 28 First guide part 30 First 2 Guide part 32 1st pin 34 2nd pin 36 Spring member F External force L Center axis

Claims (10)

A latch which is guided and supported by a lock box component such as a latch guard so that both sides are reversed and moved forward and backward, and a latch spring which is provided in the latch and causes the latch to advance and slide toward the strike and to cause a reverse force In the reverse latch lock of the door provided, the movement speed reduction means for reducing the movement speed of the latch is provided in the latch or the lock box component,
Inverted latch lock on the door. The moving speed reduction means provided in the latch is received in the latch so as to be relatively displaceable, and is provided with a spring receiving member that supports one end of the latch spring, and provided in the spring receiving member, and is always attached to the lock box component. Characterized in that it is configured with a frictional resistance inducing mechanism that imparts a force to induce a frictional resistance with the lock box component,
The reverse latch lock of the door of Claim 1. The frictional resistance inducing mechanism includes a guide hole that penetrates the spring receiving member in a direction substantially orthogonal to the direction of the slide, a frictional resistance inducing spring that is retracted and accommodated in the guide hole, and the friction It is provided at both ends of the resistance-inducing spring, and is formed by a friction element that elastically contacts the lock box component,
The reverse latch lock of the door of Claim 2. The frictional resistance inducing mechanism includes two guide holes that are drilled from both sides in a direction substantially orthogonal to the sliding direction in the spring receiving member, and two guide holes that are contracted and accommodated in the two guide holes. It is formed by a frictional resistance inducing spring, and a friction element that is provided at the ends of both frictional resistance inducing springs and elastically contacts the lock box component,
The reverse latch lock of the door of Claim 2. The frictional resistance inducing mechanism includes two guide holes formed in series in the spring receiving member in a direction substantially orthogonal to the sliding direction and accommodated in both guide holes, and repels each other to repel the lock box It is formed by two frictional resistance-inducing magnets that are in sliding contact with the constituent elements,
The reverse latch lock of the door of Claim 2. The moving speed reduction means provided in the latch is received in a relatively displaceable manner in the latch, a spring receiving member that supports one end of the latch spring, and a pair of base portions and a pair extending rearward from the base portions. A U-shaped shock absorbing leaf spring having a bent leg portion, and a guide plate for penetrating and supporting both the leg portions of the leaf spring having the base portion received in the spring receiving member so as to be in elastic contact with the hole at all times. It is equipped with,
The reverse latch lock of the door of Claim 1. The moving speed reduction means provided in the latch includes a spring receiving member provided in the latch so as to be relatively displaceable, a coiled latch spring contracted between the spring receiving member and the guide plate, and an inside of the latch spring. A spring guide having one end coupled to the spring receiving member, the other end extending rearward and penetrating the guide plate, and an impact absorbing member interposed between the rear end of the spring guide and the guide plate. Characterized by being formed,
The reverse latch lock of the door of Claim 1. The moving speed reduction means provided in the lock box component is received by the latch so as to be relatively displaceable, and a spring guard member that supports one end of the latch spring, and a latch guard that is provided so that the spring receiver can be moved forward and backward. And a torsion spring that is provided between the latch guard and the lock box and constantly biases the latch guard to the retracted position. Normally, the latch guard resists the biasing force of the latch spring. The forcible spring is urged to the retracted position by the spring urging force, but when the forcible force to slide the latch backward is unloaded, the latch that slides forward by the latch spring collides with the latch guard. After that, it is configured to move forward together with the latch guard against the spring biasing force of the torsion spring. The butterfly,
The reverse latch lock of the door of Claim 1. The moving speed reduction means provided in the latch is received in the latch so as to be relatively displaceable, and is provided separately from a spring receiving member that supports one end of the latch spring, and the spring receiving member. A frictional resistance inducing mechanism that constantly applies an urging force to induce a frictional resistance with the lock box components;
The frictional resistance inducing mechanism includes a cylindrical pin that is rotationally driven as the spring receiving member slides, a guide portion that rotatably supports the pin, and constantly pressing the pin toward the guide portion. A spring member that restricts rotation of the pin, and
The reverse latch lock of the door of Claim 1. The moving speed reduction means provided in the latch is pivotally supported so as to swing on the latch, and is formed between a swing lever formed to be able to come into cam contact with the strike, and between the swing lever and the latch. An impact absorbing spring provided, wherein the shock absorbing spring is configured to compressively elastically deform when the swing lever abuts on the strike.
The reverse latch lock of the door in any one of Claims 1-9.

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