JP4727086B2 - Button-type latch lock - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a latch lock for locking and unlocking a box such as a mail box installed at a doorway of a condominium or the like, and in particular, appropriately operating a plurality of push buttons disposed on a cover plate of the box. It is related with the button type latch lock unlocked by this.
[0002]
[Prior art]
As a locking and unlocking device for a mail box or the like, a dial lock has been the most common and widely used.
[0003]
For example, as shown in FIG. 4 of the drawings attached to Japanese Patent Application No. 2001-111428 previously proposed by the present applicant, the dial lock has an outer notch formed on the outer cylinder of the dial mechanism and an inner side formed on the inner cylinder. When the notch is not aligned with the latch storage slit, the latch cannot be rotated when opening the cover plate and is locked, and the dial mechanism is properly operated to align the outer notch and the inner notch with the latch storage slit. Only in some cases, the latch can be turned and the cover plate is unlocked.
[0004]
In short, it has a structure in which whether or not the latch can be rotated is made a component of locking and unlocking, and a dial mechanism is used to operate the component.
[0005]
[Problems to be solved by the invention]
However, when unlocking, the dial mechanism needs to be rotated multiple times to rotate the dial clockwise or counterclockwise so that the scale displayed on the outer periphery of the dial matches the index. With difficulty.
[0006]
In particular, fine scale alignment is more difficult for the elderly and low vision, and the operation is complicated for small children.
[0007]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a latch lock that can be easily operated by an elderly person or a child, thereby eliminating the above-described disadvantages.
[0008]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention has a head having a head and a stem each having a symbol on the surface of the cover plate of the locked box, and the stem is formed with notches having different distances from the head. The A-type and B-type pushbuttons are arranged in a matrix according to the password, and the thickness of the lid plate is inserted through the openings of the stopper plate and the baffle plate that overlap each other at a position parallel to the lid plate. On the other hand, the lid plate is driven by a stopper plate that moves in parallel to the lid plate by rotating the lever with fingers and a stopper spring. A baffle plate is provided, and the latch plate formed on the baffle plate is engaged with the latch to prevent the latch from rotating, and all the A-type push buttons are not pushed. Press the B-type pushbutton As a result, the notches of all the push buttons are aligned with the position of the opening edge of the baffle plate so that the baffle plate can be moved, and the baffle plate is moved by the turning operation of the lever, and the locking plate is engaged with the latch. Thus, the cover plate is unlocked so that the cover plate can be rotated and the cover plate is unlocked.
[0009]
【Example】
Hereinafter, the present invention will be described based on embodiments shown in the drawings.
In FIG. 1, reference numeral 10 denotes a mailbox (hereinafter simply referred to as a mailbox). A lid plate 20 is rotatably attached to the mailbox 10 by a hinge, and a locking piece 11 formed at one end of the mailbox body. And the lid plate 20 is locked by the engagement of the latch 30 and the tip of the latch 30 disposed on the lid plate.
[0010]
That is, the latch 30 is rotatably supported around the shaft 31 inside the casing 21 formed integrally with the cover plate 20 and counterclockwise by the elasticity of the latch spring 32 as a long compression coil spring. As a result, the front end of the latch 30 faces the locking piece 11 so as to be able to come into contact therewith.
[0011]
On the other hand, a baffle plate 60, which will be described later, is disposed inside the casing 21, and a locking plate 61 formed on the baffle plate contacts the rear end portion 33 of the latch 30 from below in FIG. The lid plate 20 is in a locked state that cannot be opened.
[0012]
In other words, when the latch lock is unlocked, as shown in FIG. 9, the latch 30 is rotated clockwise by pulling the cover plate 20 toward the front, and the engagement between the front end of the latch and the locking piece 11 is engaged. Although it is necessary to unravel, in the locked state shown in FIG. 1, the latch 30 is prevented from rotating by the locking plate 61.
[0013]
On the other hand, as shown in FIG. 2, nine openings 22 are formed in a matrix on the front surface of the casing 21, and push buttons 40 are disposed in these openings.
[0014]
Each push button 40 has a structure in which a stem 42 is fixed to a head 41, and numbers 1 to 9 are respectively displayed on the surface of the head (see FIGS. 1, 2, 5, and 6).
[0015]
As shown in FIGS. 1 and 4, each push button 40 is urged outward by the elasticity of the button spring 45 as a compression coil spring, but has a flange 43 and an opening at the rear end of the head 41. Detachment is provided by engagement with the opening edge of 22 (see FIG. 7).
[0016]
Further, as shown in FIGS. 4 to 8, a locking projection 46 having a right-angled triangular cross-section is projected from the inner end portion of each stem 42, and the left side end in FIGS. A rectangular notch 44 is formed at the edge.
[0017]
As shown in FIG. 5, there are two types of notches 44, a notch having a large distance from the head surface (distance H1) and a notch having a small distance from the head surface (distance H2). A push button having a notch is assumed to be A type, and a push button having the latter notch is assumed to be B type.
[0018]
These A-type and B-type push buttons are arranged in different development patterns according to the code assigned to each button-type latch lock.
[0019]
On the other hand, as shown in FIG. 4, the guide plate 50, the baffle plate 60, and the stopper plate 70 are superposed in the casing 21 in a positional relationship perpendicular to the stem 42.
[0020]
These inner guide plates 50 have a structure in which nine first openings 51, 51 are formed in a flat plate in the same development pattern as the push button arrangement, and are fixed in the casing 21. It serves as a guide for movement.
[0021]
Further, the baffle plate 60 has a structure in which nine second openings 62 are formed in the flat plate in the same development pattern as the push button arrangement, and is guided so as to be movable in the left-right direction with respect to the guide plate 50.
[0022]
A locking plate 61 is cut and raised in a substantially central portion of the baffle plate 60. In a normal state, the locking plate is located at the same position as the rear end portion 33 of the latch 30 in a plan view. As described above, the clockwise rotation of the latch is prevented.
[0023]
Furthermore, the first and second flanges 64 and 66 are formed at one end edge (right end edge in FIG. 4) of the baffle plate 60 by bending in the front and rear and left and right directions.
[0024]
The first flange 64 has a connection hole 63 that is slidably fitted to the tip of a spring shaft 75 of a stopper plate 70, which will be described later. The outer surface of the second flange 66 has a return spring 65, which will be described later. It is a spring receiver at the end.
[0025]
Furthermore, the stopper plate 70 has a structure in which nine third openings 71, 71 are formed in a flat plate in the same development pattern as the push button arrangement, and a support 72 is suspended from the side edge of each opening. Yes.
[0026]
A spring shaft 75 around which a stopper spring 76 is wound protrudes from one end edge (right end edge in FIG. 4) of the stopper plate 70, and an arm 82 of a lever 80 described later is inserted therethrough. Two square holes 77, 77 are formed.
[0027]
On the other hand, as shown in FIG. 1, a lever 80 is rotatably supported on the casing 21 by a lever shaft 81, and arms 82 formed at both ends of the lever 80 are square holes of the stopper plate. 77 is inserted through.
[0028]
In the structure described above, the baffle plate 60 is urged to the left by the elastic force of the return spring 65 elastically mounted between the casing inner surface and the second flange 66, and the right edge 67 of the second opening 62 is the stem. It is elastically contacted to the right side edge of 42.
[0029]
Further, the stopper plate 70 is biased leftward by the elastic force of the stopper spring 76, and the right end edge 78 of the third opening 71 is also elastically contacted with the right end edge of the stem 42.
[0030]
In the above-described state, the stem 42 and the column 72 of the stopper plate are positioned adjacent to each other in plan view (see FIG. 7). When the push button 40 is pushed in this state, the lower surface of the stem locking projection 46 is The push button is held on the item surface 73 of the column 72 and held in a sunk state. (FIG. 8) At this time, the column 72 is restored to its original shape after being temporarily distorted to the left side by elasticity.
[0031]
Next, the mechanism of locking / unlocking by the latch lock will be described.
[0032]
As described above, there are two types of push buttons 40, A type and B type.
[0033]
Thus, in the A type having a notch with a large distance from the head, the position of the notch is aligned with the position of the baffle plate 60 in a normal state where the push button is not pressed, and the notch has a small distance from the head. In the B type, the position of the notch is set to be aligned with the position of the baffle plate when the push button is pressed. (Figs. 7 and 8)
[0034]
Therefore, the notches 44 of all the push buttons are aligned with the positions of the baffle plates 60 by pushing all the B type push buttons without pushing all the A type push buttons.
[0035]
Conversely, if the above condition is not satisfied, the notch of any push button is not aligned with the position of the baffle plate.
[0036]
When all the notches are aligned with the position of the baffle plate, when the lever 80 is hung with the fingertip 90 and pulled forward, the arm 82 moves to the right and the stopper plate 70 also moves to the right. (Fig. 9)
[0037]
The movement of the stopper plate 70 urges the baffle plate 60 to the right via the stopper spring 76. If the left end edge 68 of the second opening 62 of the baffle plate enters the notch 44 in advance, the entire baffle plate is moved to the right, and the locking plate 61 is also moved. As a result, the rear end 33 of the latch 30 is moved. Cleared.
[0038]
Accordingly, when the lid plate 20 is pulled forward while pulling the lever, the lid plate is opened as shown in FIG.
[0039]
Further, the length of the stopper plate third opening 71 in the left-right direction is set to be larger than the width dimension of the push button stem 42, and when the stopper plate is moved to the right hand, the push button locking projection 46 and the support column 72 is disengaged from the item surface 73, the fingertip is released from the lever, and the push button is returned to the original shape protruding from the opening 22 and reset.
[0040]
On the contrary, even if one lever of the push button is not aligned with the position of the baffle plate, the stopper plate 70 moves, but the left edge 68 of the second opening 62 of the baffle plate is in the notch 44. It cannot enter and the baffle is prevented from moving.
[0041]
Therefore, the locking plate 61 is maintained in the locked state without being cleared from the rear end portion 33 of the latch.
[0042]
Next, the number of combinations of the code numbers of the latch lock will be considered.
[0043]
If there is one B-type push button and all others are A-type push buttons, the number of passwords in this case is the number of combinations from which nine are selected, and 9 is obtained.
[0044]
If two B-type pushbuttons are used, the number of combinations is 36, 3 is 84, 4 is 126, 5 is 126, 6 is 84, 7 is 36, and 8 is 36. In this case, the total number of combinations is 510, which is sufficient for practical use as a mailbox lock.
[0045]
【The invention's effect】
As will be apparent from the above description, the present invention provides a plurality of push buttons on the surface of the cover plate of the mail box, and assigns A type and B type push buttons having different notch positions. Since the lid plate is unlocked by the appropriate push button operation according to the push button, there is no need to make a fine scale as with the conventional dial lock, and the elderly and amblyopia look at the push button number. An effect that even a person can operate easily is achieved.
[0046]
Moreover, since only the push button of the number according to a code code is pushed, even a small child can operate easily.
[0047]
Furthermore, since each push button is automatically reset and locked by opening the cover plate, there is no need to perform the locking operation one by one and there is no worry of forgetting to lock.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a button-type latch lock according to the present invention, showing a locked state.
FIG. 2 is a front view of a casing of a lid plate.
FIG. 3 is a rear view of the casing of the lid plate.
FIG. 4 is a perspective view showing configurations of a push button, a guide plate, a baffle plate, a stopper plate, a latch, and a lever.
FIG. 5 is a front view of an A-type push button.
FIG. 6 is a front view of a B-type push button.
FIG. 7 is an explanatory view showing a relationship between a stem and a support of an A-type push button.
FIG. 8 is an explanatory diagram showing a relationship between a stem and a support of a B-type push button.
9 shows the unlocked state in the same longitudinal sectional view as FIG.
[Explanation of symbols]
10 Locked box (post box)
20 Lid plate 21 Casing 22 Opening 30 Latch 33 Rear end portion 40 Push button 41 Head 42 Stem 44 Notch 46 Locking protrusion 50 Guide plate 60 Baffle plate 61 Locking plate 70 Stopper plate 72 Post 80 Lever 82 Arm

Claims (1)

On the surface of the cover plate of the lockable box, the A-type and B-type pushbuttons having a head and a stem with a symbol on the surface and having a notch with a different distance from the head on the stem The stopper plate and the baffle plate that are overlapped with each other at a position parallel to the lid plate are inserted through the openings of the stopper plate and the baffle plate so as to be movable in the thickness direction of the lid plate. A stopper plate that moves in parallel to the lid plate by rotating the lever with fingers is provided inside the plate, and a baffle plate that is driven by the stopper plate via a stopper spring is formed on the baffle plate. By locking the locking plate by engaging the latch plate with the latch, all the A-type pushbuttons are not pushed, and all the B-type pushbuttons are pushed, The push button notch is in the way The baffle plate can be moved in alignment with the position of the opening edge of the cover, and the baffle plate is moved by the lever turning operation so that the locking plate is disengaged from the latch. A button-type latch lock characterized in that the lid plate is unlocked to enable movement.

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