JP4251479B2 - Silent locking device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a silencer locking device, and more particularly to a silencer locking device that silences noise generated by restoring a latch of a dial lock biased by a spring when a lid door of a mail box or the like is opened.
[0002]
[Prior art]
Mailboxes with a dial lock on the lid door are well known. One problem with such mailboxes is the generation of noise. In other words, the dial lock has a latch that is locked to a locking protrusion provided on the mail box. When the dial door of the dial lock is opened and the lid door is opened, the latch resists the biased spring. Overcoming the locking ridge to release the opening and closing restraint, and then the latch quickly returns to its original position by the bias of the spring, but at that time the latch sharply strikes the containing shell holding it A collision sound is generated. As a measure to reduce the occurrence of this collision noise, the outer edge of the buffer piece of the latch head is formed in an arc shape, and when the door is opened, the outer edge of the buffer piece and the latch locking piece attached to the mailbox are A technique has been developed for reducing the impact sound by sliding and reducing the restoring speed of the latch (see, for example, Patent Document 1). However, this technology does not fully utilize the stress in the direction of the lid lid of the latch that occurs when the door is opened to mute the sound, and the head of the latch has a relatively long sickle shape. Allow the latch to get out of the way, or to operate the long latch head in the closed state by unlocking it by inserting a finger or a tool through the mail insertion port on the lid door. There are problems such as.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-303063
[Problems to be solved by the invention]
The problem to be solved by the present invention is to provide a silencing locking device that can obtain a sufficient silencing effect in spite of the use of a short depth latch to solve the above-mentioned problems. .
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, in the present invention, an arc edge is formed on each tail portion on the opposite side of the latch head to be in contact with the locking protrusion of the box, and the dial mechanism is disengaged when the door is opened. When locking and opening the lid of the box body, by continuously sliding the head arc edge and the locking protrusion protruding from the box body, the head arc edge and the locking protrusion To increase the braking effect of the latch and enhance the silencing effect by sliding the tail arc edge and the opening edge of the dial lock housing shell by the pressure on the tail side of the latch that occurs in contact with the strip. I have to.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The silencer locking device according to the present invention includes a latch that penetrates perpendicularly to the depth direction of the housing shell extended from the dial lock body behind the dial mechanism of the dial lock attached to the lid door pivotally attached to the box. A storage groove is formed, a spring storage recess is formed adjacent to the latch storage groove, and a vertical guide shaft is erected in the vicinity of the center of the latch storage groove to open one side of the latch storage groove A slot that has a head protruding outward from the head and a tail that can protrude outward from the other opening of the latch receiving groove, and extends in a direction connecting the head and the tail and is inserted into the guide shaft The latch in which the hole is perforated is urged in a direction in which the head protrudes out of the housing shell and in a direction to rotate forward by the elasticity of a spring disposed in the spring housing recess. The front of the head of the latch is inside the box when locked. A head step edge that is locked forward with respect to the protruding locking protrusion and a head arc edge that is centered on a position behind the slot are then fringed, and the head A tail arc edge centered on the axis when the guide shaft is present at the tail side end of the slot, and a front opening of the other side opening of the housing shell. The edge is located on an arc formed by the tail arc edge, and when the dial mechanism is unlocked and the lid door is opened, a sudden rotation in the restoring direction of the latch by the elastic force of the spring is performed. By continuously sliding the head arc edge and the locking ridge, and in the direction of the tail of the latch that is generated when the head arc edge and the locking ridge slide. Lord be alleviated by sliding the該尾portion arc edge was a non-contact state by the pressing force and the front side opening edge of the other side opening And features.
[0007]
In addition, when the head of the latch rides over the latching ridge when the door is opened, the head step edge and the head step edge are secured in order to ensure smooth operation and to apply a strong pressing force to the latch by the ride over the latch. The subsequent head arc edge is continuous by a head curve edge.
[0008]
Further, when the door is opened, the tail arc edge is trimmed in a direction along the tail arc edge and the slot so that the front opening edge of the other side opening can smoothly transition from the non-contact state to the sliding state. The leading edge of the latch is continuous by a tail curved edge.
[0009]
Also, when the door is opened, the contact time between the latch head and the locking ridge is kept long to make it easier to convert the rotational force generated by the spring force into friction, and when the door is closed, the latch moves in the hinge direction of the lid door. In order to perform smoothly, in order to make the latch fully locked to the locking protrusion in the closed state, the locking protrusion has a horizontal cross section at least from the front of the box. An inclined surface facing the inner side of the box body is formed toward the rear, and a rear end surface substantially perpendicular to the side surface of the box body is formed.
[0010]
【Example】
Embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows a box 1 in which the present invention is used, specifically a mail box. A lid door 2 having an insertion port is pivotally attached to the box body 1 at one side. A dial lock 3 having a dial mechanism as shown in FIG. 2 is attached to the other side of the lid door 2, and a later-described latch 4 of the dial lock 3 is fixed to the inner side of the box 1. The lid door 2 can be locked by being locked to the locking protrusion 5. FIG. 3 shows a horizontal cross section of the dial lock 3 attached to the lid door 2 in a state in which the lid door 2 is pulled when unlocked and the latch 4 gets over the locking protrusion 5. In the present invention, since there is no essential point in the dial mechanism of the dial lock 3, the description of the mechanism is omitted. The general function will be described. When a predetermined rotation is applied to the knob 6, the interlocking first ring 7 and second ring 8 rotate, and the first ring 7 and the second ring 8 are notched in the unlocked state. When the lid 6 is opened by pulling the knob 6 at the position where the positions 7a and 8a coincide with each other, the tail portion of the latch 4 housed in the housing shell 10 extending rearward of the dial mechanism 9 is cut out 7a. As a result, the latch 4 can rotate around a guide shaft 17 existing in a slot 16 which will be described later, and the latch 4 is latched from the locking protrusion 5 by the clockwise rotation of the latch 4. It becomes possible to open the door by releasing the restriction of 4. A push-type dial lock may be used as the dial lock.
[0011]
Inside the housing shell 10, a latch housing groove 11 penetrating the housing shell 10 perpendicular to the depth direction is formed, and the latch 4 is housed in this groove. The latch 4 includes a head 13 that protrudes from one side opening 12 of the latch housing groove 11 and a tail 15 that can protrude from the other side opening 14 on the opposite side. A slot 16 extending in the direction connecting the head 13 and the tail 15 is formed. A guide shaft 17 erected in the vertical direction from the housing shell 10 is inserted in the groove hole 16 near the center of the corresponding latch housing groove 11. A spring housing cave 18 is formed in the housing shell 10 adjacent to the latch housing groove 11 and a spring 19 is housed. One end of the spring 19 is engaged with a spring stop projection 20 provided on the side edge of the latch 4, so that the head 13 of the latch 4 protrudes out of the housing shell 10 and rotates forward by the elasticity of the spring 19. It is energized. The head portion 13 of the latch 4 includes a head step edge 21 for locking the front side of the head portion 13 forwardly with respect to the locking protrusion 5 provided on the inner side of the box 1 at the time of locking. When the head arc edge 23 centered on the position 22 behind the slot 16 is centered, and the tail 15 on the side opposite to the head 13 is provided with the guide shaft 17 at the tail side end of the slot 16. A tail circular arc edge 24 centered on the axis is trimmed.
[0012]
The head step edge 21 and the following head arc edge 23 are continuous by a head curve edge 25, and the latch arc edge 24 and the latch front edge 26 edged in the direction along the slot 16 are the tail curve edge. 27 is continuous. Again, in the housing shell 10, the front opening edge 28 of the other opening 14 is positioned on an arc formed by the tail arc edge 24. Next, the structure of the locking ridge 5 fixed to the box 1 will be described. In FIG. 4, which is an exploded perspective view of the locking protrusion 5, and in FIG. 5, which is an explanatory sectional view of the door opening state, the mouth piece 29 protrudes at an intermediate position along the front edge at the inner side of the box 1. The provided corner bracket 30 is fixed. A locking member 5 is formed by covering and fitting a covering member 32 made of synthetic resin to the front crosspiece 31 having a rectangular cross section of the mouthpiece 29. The covering member 32 has a U-shaped cross section with an opposing locking edge following the front hollow triangular cross-section, and the U-shaped cross-section portion is fitted to the front rail 31 and is fixed to the mouthpiece 29. . The important point of the locking ridge 5 is that the slope of the inner side of the hollow triangular cross section of the covering member 32 faces the inner side of the box 1 from the front to the rear of the box 1, in particular, the slope of the convex arcuate cross section. That is, the rear surface of the U-shaped cross-section portion is a rear end surface 34 that is perpendicular to the inner surface of the box 1. The latch 4 according to the present invention has a relatively short head arc edge 23 so that the latch 4 is completely accommodated in the space in the mouthpiece 29 when locked. It becomes impossible to operate the latch 4 by inserting an instrument, and the act of opening the door by such an operation can be prevented.
[0013]
Next, operations related to the latch will be described. As described above, FIG. 5 shows an open state. At this time, the latch 4 is in a state where the guide shaft 17 reaches the tail side end of the slot 16 due to the bias of the spring 19. Projecting out of the housing shell 10. FIG. 6 shows a state in the middle of shifting from the open state to the closed state. When the lid door 2 is pushed in for closing, the head arc edge 23 in the head 13 of the latch 4 comes into contact with the inclined surface 33 of the locking ridge 5 fixed to the box 1. If the pushing is continued as it is, the locking protrusion 5 will press the head arc edge 23 of the head 13, and the head 4 of the latch 4 is pulled into the housing shell 10 against the bias of the spring 19. Thus, the lid door 2 moves in the hinge direction. The inclined surface 33 of the locking ridge 5 smoothly contacts the head arc edge 23. In particular, when the inclined surface 33 is formed in a convex arc shape in cross section, smoother contact can be obtained. The movement of the latch 4 in the cover door 2 in the hinge direction is also performed smoothly. When the protrusion 5 passes the head curved edge 25 over the head arc edge 23 and reaches the head step edge 21, the head 13 of the latch 4 is biased by the spring 19 as shown in FIG. Returns to the state of projecting out of the housing shell 10, and the head step edge 21 is locked to the rear end face 34 of the locking protrusion 5, thereby completing the locking of the lid door 2.
[0014]
In order to close and open the locked lid 2, first, as already described with reference to FIG. 3, the knob 6 of the dial lock 3 is first rotated to the unlocked state. When the lid 2 is pulled in the unlocked state, as shown in FIG. 8, the rear end surface 34 of the locking ridge 5 presses the head step edge 21 in the head 13 of the latch 4 as shown in FIG. Since the restraint of the tail portion 15 of the latch 4 is released by this, the latch 4 biases the spring 19 while maintaining the state where the guide shaft 17 reaches the tail side end of the slot 16 by the bias of the spring 19. In contrast, clockwise rotation about the guide shaft 17 is started. The latch 4 released from the locking ridge 5 is moved out of the housing shell 10 by the elasticity of the spring 19 as soon as the locking ridge 5 has passed over the head step edge 21. Initiates a return motion that rotates in a protruding direction and counterclockwise. However, since the movement speed of the lightweight latch 4 by the spring 19 is sufficiently high compared to the pulling speed of the cover plate 2 by a human hand, as shown in FIG. The curved edge 25 abuts against the head arc edge 23, and this abutment exerts a stress in the tail direction on the latch 4, so that the tail arc edge 24 abuts on the front opening edge 28 of the other side opening 14. Become.
[0015]
When the head step edge 21 of the latch 4 and the following head arc edge 23 are made continuous by the head curved edge 25, when the head 13 gets over the locking protrusion 5, a smooth operation is ensured, A strong pressing force in the direction of the tail 15 can be applied to the latch 4 by getting over. Further, since the tail arc edge 24 and the latch front edge 26 bordered in the direction along the slot 16 are continuous by the tail curved edge 27, the tail arc edge 24 becomes the front opening edge 28 of the other side opening 14 when the door is opened. On the other hand, it is possible to smoothly shift from the non-contact state to the sliding state. The return movement of the latch 4 due to the abutment described above causes friction between the locking projection edge 5 and the head curved edge 25 to the head arc edge 23 and between the front opening edge 28 and the tail arc edge 24. These frictions reduce the speed of the return movement of the latch 4 and reliably reduce the collision sound generated when the latch 4 hits the housing shell 10 and others when the door is opened as shown in FIG. By providing two friction points in this way, it is possible to sufficiently mute even with the latch 4 in which the head arc edge 23 is formed relatively short, or without covering the contact edge of the latch 4 with synthetic resin or the like. . The inclined surface 33 of the locking ridge 5 keeps the contact time between the head 13 and the locking ridge 5 long so that the rotational force generated by the bias of the spring 19 can be easily converted into friction. The rear end surface 34 perpendicular to the inner surface of the box 1 serves to completely lock the latch 4 with respect to the locking protrusion 5 in the closed state.
[0016]
【The invention's effect】
The present invention has the following effects.
A. When the lid door continues to be pulled, the latch released from the locking ridge as soon as the locking ridge has passed over the head step edge, the direction in which the head protrudes out of the housing shell due to the elasticity of the spring, and The return movement that rotates counterclockwise is started, but the movement speed of the light spring of the latch is sufficiently high compared to the speed of pulling the lid plate by the hand of the person, so the locking ridge is on the arc edge of the head Since the contact causes a stress in the tail direction on the latch, the tail arc edge contacts the front opening edge of the other opening, so the return movement of the latch is the same as the locking protrusion and the head. Friction between the front arc edge and between the front opening edge and the tail arc edge, and the friction reduces the speed of the return movement of the latch. Reduces the impact sound that occurs when it hits .
B. By providing two friction points, it is possible to sufficiently mute even with a latch in which the head arc edge is formed to be relatively short or without covering the contact edge of the latch with synthetic resin or the like.
[0017]
C. If the head step edge of the latch and the following head arc edge are made continuous by the head curved edge, when the latch head goes over the locking ridge when the door is opened, smooth operation is ensured and A strong pressing force in the tail direction can be applied to the latch.
D. When the tail arc edge and the latch leading edge bordered in the direction along the slot are made continuous by the tail curved edge, the tail arc edge smoothly slides from the non-contact state to the sliding opening state with respect to the front opening edge of the other opening when the door is opened. Can be migrated to.
E. If the locking ridge is formed with an inclined surface facing the inner side of the box body from the front to the rear of the box body in a horizontal cross section, and a rear end surface substantially perpendicular to the side surface of the box body is formed. Keeping the contact time between the latch head and the locking ridge long when opening the door makes it easier to convert the rotational force generated by the spring force into friction, and also when the door is closed, the latch moves in the hinge direction of the lid door. In addition to being able to perform smoothly, the latch is completely locked to the locking protrusion when the door is closed.
[Brief description of the drawings]
FIG. 1 is a partial perspective view of a box with a dial lock mounted on a lid door.
FIG. 2 is a perspective view of a dial lock used.
FIG. 3 is a horizontal sectional view of the dial lock in the unlocked state.
FIG. 4 is a partial exploded perspective view showing a latching protrusion for latching that is fastened to the box.
FIG. 5 is an explanatory horizontal sectional view of a dial lock portion showing a latch-related operation in the opened state.
6 is a cross-sectional view having the same concept as in FIG. 5, showing a latch-related operation in the middle of closing the door.
FIG. 7 is a cross-sectional view having the same concept as in FIG. 5 and showing latch-related operations in the closed state.
FIG. 8 is a cross-sectional view having the same concept as in FIG. 5, showing latch-related operations in the initial opening state.
9 is a cross-sectional view having the same concept as in FIG. 5, showing latch-related operations in the middle stage of opening the door.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Box body 2 Lid door 3 Dial lock 4 Latch 5 Locking protrusion 9 Dial mechanism 10 Housing shell 11 Latch accommodation groove 12 One side opening 13 Head 14 Other side opening 15 Tail part 16 Groove hole 17 Guide shaft 18 Spring accommodation recess 19 Spring 20 Spring stop projection 21 Head step edge 22 Rear position 23 Head arc edge 24 Tail arc edge 25 Head curved edge 26 Latch front edge 27 Tail curved edge 28 Front opening edge 33 Inclined surface 34 Rear end surface

Claims (4)

The housing shell extended from the dial lock body is formed behind the dial mechanism of the dial lock attached to the lid door pivotally attached to the box, and a latch housing groove penetrating perpendicularly to the depth direction is formed. A spring storage recess is formed adjacent to the storage groove, and a vertical guide shaft is erected in the vicinity of the center of the latch storage groove, and the head projects outward from one side opening of the latch storage groove; The latch having a tail portion that can project outward from the other opening of the latch housing groove and extending in a direction connecting the head portion and the tail portion and having a groove hole through which the guide shaft is inserted is provided by the spring. The elastic force of a spring arranged in the storage recess causes the head to be biased in a direction protruding out of the storage shell and in a direction rotating forward. The head of the latch is locked to the head of the latch when locked. The front of the part is forward with respect to the locking ridge protruding inside the box. The head step edge to be locked in the direction and the head arc edge centering on the position behind the slot are then bordered, and the tail portion on the opposite side of the head has an edge of the slot. When the guide shaft is present at the tail side end, the tail arc edge centered on the axis is trimmed, and the front opening edge of the other side opening in the housing shell is positioned on the arc formed by the tail arc edge. When the dial mechanism is unlocked and the lid door is opened, a sudden rotation in the restoring direction of the latch due to the resilient force of the spring causes the head arc edge and the locking ridge to The tail arc that has been in a non-contact state by the pressing force in the tail direction of the latch generated by the sliding of the head arc edge and the locking protrusion. A silencer locking device characterized by relaxing by sliding an edge and the front opening edge of the other side opening .   The silencer locking device according to claim 1, wherein the head step edge and the succeeding head arc edge are continuous by a head curved edge.   The silencer locking device according to claim 1 or 2, wherein the tail arc edge and the latch front edge bordered in a direction along the slot are continuous by a tail curved edge.   The locking ridge is formed with an inclined surface facing the inner side of the box body from the front to the rear of the box body in a horizontal section, and a rear end surface substantially perpendicular to the side surface of the box body is formed. The silencer locking device according to any one of claims 1 to 3, wherein the silencer locking device is provided.

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