JPH057510B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a locking mechanism for setting a locking bolt in a locked state and in a movable state to an unlocked position based on a push button operation.

Prior art and its problems This type of lock mechanism has several to ten locks that can be operated in a vertical direction relative to a flat casing surface.
A notch is formed in the inner part of the casing of the first group of pushbuttons to reach a position through which one tumbler plate is passed when the pushbuttons are recessed, and the other pushbuttons of the second group A notch is provided in the inner part of the casing of the button at a position through which the tumbler plate can pass through when the pushbutton is in the protruding state, and the tumbler plate passes through all the notches only when the first group of pushbuttons is pushed in. It is known that the basic structure is that the lock bolt is moved along with the lock bolt to form a movable state. However, with this locking mechanism, the lock is unlocked if the first group of pushbuttons is selected as the target for operation, regardless of the order in which the first group of pushbuttons are pressed. It is difficult to prevent this, and for this reason, it has been necessary to increase the number of push buttons to reduce the probability of unauthorized unlocking.

The present invention solves the problems of the prior art,
To provide a push button type locking mechanism which can strictly prevent unauthorized unlocking even if the number of push buttons is small.

Means for Solving the Problems The object of the present invention is to provide a push-button locking mechanism in which a lock bolt can be moved to a locked state and a movable state to an unlocked position by moving an internal stopper. a casing to be accommodated; a plurality of push buttons elastically protruding from a substantially flat surface of the casing; and a plurality of push buttons that are coupled to the push buttons and inserted into the casing when the casing is vertically positioned with the flat surface facing forward. a plurality of blades that each move back and forth in the casing; a slide plate that is slidable while being guided in the vertical direction within the casing and has an opening that allows each of the blades to pass through at any sliding position; a tumbler plate that can be guided and slid in left and right positions with respect to the slide plate; and a tumbler plate that is guided and slidable in the vertical direction within the casing and that engages with the slide member when lowered from the raised position. a reset member for moving the slide member downward; and a reset operation button connected to the reset member and extending outside the casing for vertically moving the reset member; The tip side is shaped like a square pyramid, with an upper surface that descends, a right side surface that slopes to the left toward the tip, and a lower and left side surface that extend vertically and horizontally to the tip, and the tumbler plate corresponds to each of the blades. a plurality of vertical grooves extending vertically and having a width that allows the blade to pass through to the bottom of the quadrangular pyramid shape at any vertical position; The tumbler includes a plurality of horizontal grooves having a vertical width corresponding to a bottom cross section of the square pyramid shape of the blade, and a locking part extending leftward from a part of the tumbler plate and having an end face extending in the vertical direction. The plate is held in a position moved to the left by an elastic member supported by the slide plate, and in the tumbler plate in this held state, the right end edge of the lateral groove is located on the right side surface of the blade. The upper end edge of the first lateral groove is located further to the right, and the upper end edge of the first lateral groove cooperates with the first blade coupled to the push button to be pressed at the beginning of the unlocking operation. The upper end edge of the second lateral groove is in contact with the tip of the upper surface of the tumbler plate when the tumbler plate is raised based on the slope of the upper surface of the blade due to entry of the blade into the first lateral groove. The upper end edge of the second lateral groove is provided at a position where it contacts the tip of the inclined upper surface of the second blade, and the upper end edge of each of the third and subsequent lateral grooves also extends from the blade to the lateral groove preceding the lateral groove. The horizontal grooves in the tumbler plate are sequentially provided so that when the tumbler plate is further raised by the entry of the blade, the horizontal grooves in the tumbler plate come into contact with the tips of the inclined upper surfaces of the corresponding blades, and the vertical grooves The right edge is in contact with the tip of the inclined right side surface of each of the blades, and a detent member that is elastically movably supported is attached to the slide plate, and the detent member is attached to the tumbler. When the tumbler is in the holding position to the left, it is held in the non-operating position by the tumbler against the elastic force, and when the tumbler moves to the right, it moves to the operating position based on the elastic force and the tumbler The internal stopper is configured to prevent the reset member from returning to the left position and to be brought into contact with the reset member and moved to the inoperative position again when the reset member is lowered, and the internal stopper is provided with a locking bolt for the locking bolt. In order to enable movement to the release position, an engaging portion is provided for contacting a part of the slide plate and moving the internal stopper when the slide plate reaches the uppermost position. This is achieved by the characteristic push-button locking mechanism.

It should be understood that the indications of top, bottom, left, and right in the description of the means for achieving the objective and the claims are merely directional settings for convenience to clarify the structure of the present invention, and that they change depending on the installation situation of the lock mechanism. It is necessary to

Examples Hereinafter, a case where the locking mechanism of the present invention is applied to a locking device for a center cover fixing cap nut fixed to a wheel disk of an automobile will be exemplified.
This will be explained with drawings.

23 to 25 show a tire 200 and a wheel disc 201 mounted on an axle, and a cap nut 202 to which a locking device 1 is mounted is fixed to the wheel disc 201. The wheel disc 201 is mounted on an axle 210 via a ball bearing 211 and a hub 212 with bolts and nuts 213 in the usual manner. The bag nut 202 is a bolt nut 213
Ring plate-shaped center cover 20 that covers
5, and is fixed on the wheel disk by screwing the female threaded portion on the inner surface of the cap nut to a male threaded inner cylinder 203 fixed to the disk 201. The lock device 1 is fixed in advance to the inner end surface of the cap nut 202. Inner cylinder 203
The inner surface of the locking device 1 is provided with ratchet teeth at a position corresponding to the locking device 1.
The dead bolt is provided with an engaging pawl 121 that engages with the ratchet teeth. The dead bolt is biased in a direction that causes the engagement claw 121 to protrude,
As a result, when the cap nut 202 is screwed in, rotation of the cap nut 202 with respect to the inner cylinder 203 is allowed, and rotation in the opposite direction is prevented by engagement of the ratchet teeth and pawls 121, and the cap nut 202 is prevented from rotating in the opposite direction. This is intended to prevent the nut 202 from loosening and theft. The locking state required for removing the cap nut 202 can be released by operating the push button 20 and the operation button 21 of the locking device 1 to move the engagement pawl 121 backward.

The structure of the lock device 1 will be explained below.

1 and 2 show the locking device 1 in an exploded state. The locking device 1 basically consists of:
Moving the internal stopper 100 (see FIG. 4) based on the unlocking operation of pressing the pushbuttons 20 in a predetermined order,
A two-step lock structure is adopted in which the operating piece 70 is then slid to move the dead bolt (lock bolt) 120 to the unlocked position. The casing 10 that accommodates these dead bolts and internal stoppers includes a shallow cylindrical casing body 11, a cover 12 that covers the back side of the casing body, and a cap 13 fixed to the front side of the casing body with screws. are provided with apertures 14 and 15, respectively, for passage of blades and operating buttons, which will be described below. In the following explanation, for convenience, the directions of up, down, left, and right are basically described with the front end surface of the casing 10 vertically positioned toward the front (therefore, the left and right directions in the drawings do not necessarily correspond to each other). ). The operation button 21 is located at the center of the cap 13, and four push buttons 20 are provided surrounding this operation button, each of which partially protrudes from the cap 13 toward the front side. The push buttons 20 are each connected to a blade 30 via a flat plate 22, and the flat plate pieces 2
2, the coil springs 23 are in contact with each other, and the push button 2
It acts in the direction of making 0 stick out. The four blades 30 are arranged at approximately equal intervals in the left-right direction and slightly shifted in the vertical direction. Of course, this arrangement can be changed as necessary by changing the positions and shapes of the push button 20 and the flat plate piece 22. The operation button 21 can be slid vertically along the surface of the cap 13, and has an operation piece 7 on its inner surface.
0 are engaged and slid together. The tip portions of the blade 30 and the operating piece 70 project into the inside of the casing body 11 through the openings 14 and 15, respectively. Each blade 30 has an upper surface that descends toward the tip, a right side that slopes to the left as it approaches the tip, and a lower and left side that extend vertically and horizontally to the tip, so that the tip side is shaped like a square pyramid. .

Inside the casing body 11, the tumbler plate 5
0 is in a position where it engages with the blade 30 as described below, and this engagement causes the tumbler plate 50 to rise together with the slide plate 40. A reset member 60 is engaged with the operating piece 70, and is used for returning (resetting) from a state in which the lock cannot be unlocked due to an erroneous or unauthorized operation, and for moving the detachment bolt 120 via the operating portion 110. These structures will be explained below. As shown in FIG. 1, the four corners of the casing body 11 are thick-walled parts 16 for screw fixing and guide purposes, and the dead bolt 120 is guided by being sandwiched from above and below by the thick-walled parts 16, so that it can be moved left and right inside the casing body 11. The sliding range is determined by the convex portion 122 on the inner surface of the dead bolt and the recess 17 on the inner surface of the casing body, and the engaging claw 121 can slide within the range where it is in a protruding and recessed state with respect to the casing 10. Compression coil spring 12
3, the engaging claw is biased in the direction of protrusion. The dead bolt 120 has a roughly U-shape in plan view, and has a vertical wall 1 that protrudes at the left end (as mentioned above, the reference is the arrangement with the front side of the casing in front).
24 (see FIG. 4) constitutes a guide surface for the slide plate 40, and a leaf spring 125 is attached to the right end portion to press the slide plate 40 toward the vertical wall 124. The slide plate 40 has a thickness such that it is substantially tightly sandwiched between the dead bolt 120 and the casing body 11, and is guided by the vertical wall 124 to slide vertically within the casing. As shown in FIG. 3, the slide plate 40
has four openings 41a, 41b, 41c, 4 for passing the blade 30 rearward at any sliding position.
1d, a notch 42 for receiving a reset member is formed in the upper part, and a groove 45 for receiving a detent member is formed in the left end. Also slide plate 40
A recess 44 is formed in the front surface of the casing, and a compression coil spring 47 and a small ball 48 are housed in the recess. This ensures that it is held in the sliding position. A contact piece 46 is protruded from the lower end of the rear surface of the slide plate 40 to engage with an internal stopper 100, which will be described later. Slide plate 40
The entire center part of the front surface except the upper and lower ends is recessed, and a step part 43 is provided at an intermediate position between the upper and lower end front surfaces and the recessed fitting surface. Slide plate 50
consists of a main plate 51 and a sub-plate 55, the sub-plate 55 is guided by a vertical plane rising from the upper and lower ends of the front recessed fitting surface of the slide plate 40, and the main plate 51
They each slide in the left and right directions relative to the slide plate 40 while being guided by vertical surfaces rising from the top. The main plate 51 has four vertical grooves 52a, 52b, 52c with a width that allows the blades to pass through the positions corresponding to each blade 30.
52d is provided. Although the vertical groove 52a does not have a wall portion surrounding the left side of the vertical groove 52a, the blade 3
Since it has the same function as other vertical grooves in that it has a space for passing 0, it will be called a ``vertical groove'' like these. A horizontal groove is formed from a predetermined position of the vertical groove with a vertical width that allows the blade 30 to pass through. The longitudinal groove is
They are provided at positions corresponding to the order of operation of the push buttons 20, and in this example, there are five push buttons 20 as shown in FIG.
They are provided at positions 3b, 53c, and 53d.
The sub-plate 55 also has vertical grooves 56a, 56b, 56c, 56.
d are provided, and the width of these vertical grooves is the width including the vertical grooves and horizontal grooves in the main plate 51. As with the main plate 51, the vertical groove 56a has no wall surrounding the left side thereof. The sub-plate 55 is provided with protrusions at predetermined positions. These protrusions are also provided in accordance with the order in which the push buttons 20 are operated, and in this example, a protrusion 57 as shown is provided. The main plate 51 and the sub-plate 55 are usually located at the left side position with their lower left ends in contact with the corner of the slide plate 40, and in this position, their right ends coincide with the right end of the slide plate 40, and these three Both of them are in contact with the leaf spring 125 of the dead bolt 120 and are receiving spring force to the left. A detent member 80 and a compression coil spring 81 are inserted into the groove 45 on the left side of the slide plate 40. The groove 45 becomes narrower at the top and opens toward the upper surface of the slide plate 40. The detent member 80 has a width varying from a wide part corresponding to the lower part of the groove 45 to a narrow part symmetrical to the upper part of the groove 45 through a shoulder part, and its front surface extends slightly beyond the shoulder part from the wide part. At this position, as shown in FIG. 3, a notch 83 is formed with a protrusion 82 remaining. The upper end of the main plate 51 of the tumbler plate extends leftward and has a vertical end face to form a locking portion 59, and when the tumbler plate is in the left position, the projection 8 of the detent member
2 is positioned so as to abut the lower surface of the locking member 59, and when the locking portion 59 moves to the right as described later, the end surface of the locking portion 59 comes off the protrusion 82, and the shoulder of the detent member 80 rises due to the spring force. (See Figure 14).
The reset member 60 has a substantially T-shape as shown in FIG. 1, and its hanging central portion extends through the notch 42 of the slide plate 40, and its lower end is provided with a through hole 62 for receiving the operating piece 70. ing. The left and right wing portions 63, 64 of the reset member 60 come in contact with the upper end surface of the slide plate 40 when the reset member 60 is lowered, and serve to push down the slide plate, and the left wing portion 63 serves to push the slide plate downward when the reset member is lowered. It serves to push down the detent member 80 in the position.

Here, a more detailed explanation of the structure described above and the operation based thereon will be explained. 5 to 8 show each stage from before the unlocking operation to the unlocked state (detbolt movable state), and illustrate the state in which the cover 12, the detbolt 120, etc. are removed from the locking device. In the explanation of these figures, for convenience, the reference in the left and right direction will be in the state shown in the drawing, and will be expressed as "left (top of the figure)" to distinguish it from the above-mentioned reference. As mentioned above, the tumbler plate 50 is always in the right position (as shown in the figure) under the action of the leaf spring 125 of the dead bolt 120, but before the unlocking operation begins, the vertical and horizontal grooves are as shown in Fig. 5. Each one is located like this. These positions will be explained in detail together with the actions based on the unlocking operation. Condition before starting unlocking operation (5th
In the case shown in FIG. 9, the upper edge of the lateral groove 53d is in contact with the tip of the inclined upper surface of the blade 30d (see also FIG. 9). When the push button 20 is pressed and the blade 30d enters the inside of the casing,
The main plate 51 has the upper edge of the horizontal groove 53d connected to the blade 30d.
The blade slides on the sloped upper surface of the blade 30d and reaches a position where its upper edge touches the uppermost edge of the blade 30d (see FIG. 10). Along with this, the sub plate 55 and the slide plate 40 also rise by the same amount, The state shown in FIG. 6 is reached. In this state, the lateral groove 53b is in contact with the tip of the inclined upper surface of the blade 30b, and when the corresponding push button 20 is pressed to move the blade 30b into the casing, the main plate 51 is moved into the lateral groove 53b in the same manner as described above. The upper edge slides on the upper surface of the blade until it reaches a position where it touches the uppermost edge of the blade, and the secondary plate 55 and slide plate 40 are accordingly in the state shown in FIG. 7.
The relationship between the main plate 51 and the blade 30d in this state is shown in detail in FIG. 11. As is clear from this figure, the left edge (top of the diagram) of the vertical groove 52d is in contact with the tip of the inclined left side surface (top of the diagram) of the blade 30d. In the state shown in FIG. 7, the next button to be operated is the push button 20 corresponding to the blade 30c, but if another push button is pressed due to an erroneous or unauthorized operation and the blade 30d enters the casing. The main plate 51 slides the left edge of the longitudinal groove (on the figure) on the left side surface (on the figure) of the inclined blade 30d, so that the left edge of the blade 30d
0d reaches the position touching the leftmost end (see Fig. 12). In this case, the main plate 51 moves to the right against the force of the leaf spring 125, leaving the secondary plate 55 and the slide plate 40 in their original positions, as shown in FIG. is the protrusion 8 of the detent member 80
2, and the detent member is raised based on the spring 81. Even if the push button 20 is released from this state and the blade 30d is moved backward, the main plate 51 will not return to its original position because the end surface of the locking portion 59 is in contact with the side surface of the protrusion 82. . Therefore, as is clear from FIG. 12, the blade 30
d does not move the main plate 51 in any direction even if it enters again. Vertical grooves 52a, 52b, 5
The positional relationship with respect to each blade of 2c is also the vertical groove 52d.
As is clear from FIG. 14, in this state, no matter which push button is pressed to advance the blade, the main plate 51 does not move in any direction. Therefore, once an erroneous or unauthorized operation occurs, the lock will no longer be unlocked no matter which push button is pressed. To release this state where the lock cannot be unlocked, press the operation button 2.
1 to lower the reset member 60. As a result, as shown in FIG. 15, the wing portion 63 of the reset member pushes down the detent member to bring the protrusion 82 below the locking portion 59, and the main plate 5
1 is returned to its original left position based on the action of the leaf spring 125. The next thing to be operated from the state shown in FIG. 7 is the push button 20 corresponding to the blade 30c, and by that operation the blade 30c is
Go inside. In this case, there is a secondary plate 5 in the horizontal groove 53c.
A protruding piece 57 of No. 5 protrudes to cover the upper half of the horizontal groove, and both the main plate 51 and the sub-plate 55 are moved as shown in FIGS. 16 to 19 below.
FIG. 16 shows the state before the blade 30c enters, where the upper edge of the lateral groove 53c is in contact with the tip of the slanted upper surface of the blade 30c, and the protrusion 57 is on the slanted left side surface of the blade 30c. It is located in contact with the tip of the (above figure). Therefore, when the blade 30c enters the inside of the casing, the main plate 51 aligns the upper edge of the lateral groove 53b with the blade 30c.
c The sub-plate 55 slides on the upper surface and rises, while the sub-plate 55 slides the right edge of the projecting piece 57 (on the figure) on the left side surface (on the figure) of the blade 32 and moves to the left (on the figure).
When the blade 30c enters the innermost part, the main plate 5
1 rises to a position where the upper edge of the lateral groove 53c touches the uppermost edge of the blade 30c, and the sub-plate 55 moves to a position where the right edge of the protrusion 57 (top of the figure) touches the left edge of the blade 30c (top of the figure) (Fig. 18). reference). Since the rise of the main plate 51 is accompanied by the sub-plate 55 and the slide plate 40, the sub-plate 55 moves to the left (on the figure) against the force of the leaf spring 125 while rising. When the push button 20 is released and the blade 30c is moved backward, only the sub plate 55 is moved in parallel to the right by the action of the leaf spring 125 without changing the vertical positions of the main plate 51, sub plate 55, and slide plate 40. (See Figure 19).
In this state, the lower end of the protrusion 57 is connected to the blade 30c.
The blade 30c is in contact with the tip of the inclined upper surface of the blade 30c.
When the blade 30c enters, the sub-plate 55 slides the lower edge of the projection 57 on the upper surface of the blade 30c and rises. Vice plate 5
The rise of 5 is accompanied by the rise of the slide plate 40 and the main plate 51, whereby the slide plate reaches the uppermost position. As is clear from comparing FIG. 22 and FIG. 20, when the slide plate 40 reaches this uppermost position, the contact piece 46 comes into contact with the engagement portion formed as a tip inclined surface of the internal stopper 100. , the internal stopper 100 is moved to the left (upward in the figure) to create a movable state of the dead bolt as will be described later.

Next, details of the moving mechanism of the dead bolt 120 and its operation will be explained. Det bolt 120
The movement is performed via the actuator 110 based on the operation of the operation button 21. The actuating portion 110 includes a ring 111 and a cam 112. ring 11
1 is passed through the tip of the operation piece 70, and the slide plate 4
0 and a dead bolt 120, and can be moved up and down using an operation button 21.
The cam 112 has a substantially inverted L shape, and has a first
As shown in the figure, the lower edge 113 of the upper part extends substantially horizontally and touches the upper surface of the ring 111, and the lower edge curves and extends downward to the right side of the ring 111 (as shown in the upper figure).
Inclined surface 1 touching a position slightly below the center of
14, and the lower part of the cam 112 is an elongated leg 115. When the operation button 21 is in the raised position before and during unlocking, the actuating part 110 is in the position shown in FIG. 20,
The cam 112 has its right side (on the diagram) in contact with a vertically elongated contact portion 126 provided on the inner surface of the dead bolt 120. The internal stopper 100 has an engaging portion 101 with one end inclined as shown in FIG. A guide groove 12 provided in the dead bolt 120 is provided with a convex portion 103 for limiting the sliding range.
Sliding within 7. The internal stopper 100 is closed until the dead bolt can be moved due to unlocking.
is located at the right position (upper part of the figure) as shown in FIG. and the internal stopper 100
is the compression coil spring 1 inserted into the guide groove 127
04 to the right position. 20th
When the operation button 21 is slid downward from the state shown in the figure, the ring 111 is lowered via the operation piece 70.
The cam 112 is guided by the contact portion 126 and the ring 11
1 pushes the inclined surface 114 and descends. At this time, the cam 112 moves the leg 115 into the recess 1 of the internal stopper.
02, the lowering is allowed. Therefore, this operation does not move the deadbolt 120, and only resets the lock from the unlockable state by lowering the reset member 60. On the other hand, the slide plate 40 reaches the uppermost position and the contact piece 46 comes into contact with the engaging part 101, pushing the internal stopper 100 to the left (top of the figure) against the force of the spring 104.
When the dead bolt 120 is moved to , the dead bolt 120 can be moved by sliding the operating button 21 downward. That is, by moving the internal stopper 100 to the left (upward in the figure), the recess 102 is moved to the leg 11 of the cam.
5, and when the ring 111 is lowered based on the sliding of the operation button 21 in this state, the cam 112 cannot be lowered because the legs 115 come into contact with the upper surface of the internal stopper 100. moves to the right (upward in the figure) while lowering the ring 111 along the inclined surface 114, and the contact portion 12
6 to move the dead bolt 120 to the right (upward in the figure) (see Fig. 22).
As a result, the engaging pawl 121 is buried within the casing 10, releasing the lock.

In order to obtain the locked state again, the operation button may be slid upward once from this state and then slid downward again. When the operation button 21 is raised, the pressing force on the cam 112 is released and the bolt 120 is released.
is moved to the left (upward in the figure) by the spring 123 with the cam to the position shown in FIG. When the operation button 21 is lowered again, the reset member 60 lowers the slide plate 40 together with the tumbler plate 50 to the lowest position. At this time, the cam 112 passes the leg portion 115 through the recess 102 of the internal stopper and descends as described above. This operation results in the state before unlocking as described at the beginning.

As the detent member, in addition to the member 80 that slides up and down as in the above embodiment, it is supported so as to be rotatable up and down in response to an upward biasing force, and when the tumbler is in the left position, the tumbler plate When the tumbler is moved to the right, the tumbler is rotated upward to a substantially horizontal position based on the biasing force, and prevents the tumbler from returning to the left.
The tumbler is configured to be rotated downward again by lowering the reset member 60, or configured to be protruded and buried in the front-rear direction by moving the tumbler to the right and lowering the reset member, respectively. You can use the following items as appropriate. In short, by moving the tumbler to the right,
It is sufficient that the detent is moved from the non-operating position to the operating position under a biasing force, and then moved back to the non-operating position by lowering the reset member.

In the embodiments described above, the tumbler plate includes a main plate and a sub-plate, but the sub-plate may be omitted and the tumbler plate may be configured only by what corresponds to the main plate. However, in this case, since the lateral grooves 53 cannot be provided vertically and continuously, it is not possible to create a lock that requires an unlocking operation by successively pressing a specific push button.

It goes without saying that the locking mechanism of the present invention can be applied to various locks other than the aforementioned locking device for automobile wheels.

FIG. 26 shows an example in which the locking mechanism of the present invention is applied to a padlock. The unlocking mechanism itself in this example is the same as in the previous embodiment, and similar members are designated by the same numbers as in the previous embodiment. In this example, a shackle 140 is attached to the casing 10 so as to be movable up and down, and a hook 128 is provided at the top of the lock bolt 120, which corresponds to the dead bolt in the previous embodiment, so that it can be engaged with and detached from the hook at the tip of the shank 140. is being used. The unlocking operation of this padlock is the same as in the previous embodiment, and the locking operation is the same as that of a normal padlock.

The tip of the operation piece 70 is made long enough to be locked only to the reset member 60, and another shaft 150 is passed through the ring 111, and the shaft 150 is moved up and down by an operation section 160 that is separate from the operation piece 70. It can also be done. In this case, only the creation of the unlocking start state and the reset operation are performed using the operating button 21, and the movement of the lock bolt 120 to the unlocked position is performed separately by pressing down the operating section 160. Of course, such a structure in which separate operating members are provided can also be applied to the embodiments described above.

FIG. 27 shows another example in which the locking mechanism of the present invention is applied to a padlock, in which the same members as in the first embodiment are given the same numbers. The shackle 140 in this example is rotated 90 DEG from that in the example of FIG. In this example, there is no member corresponding to the ring 111 and cam 112 in the first example, and the member corresponding to the dead bolt 120 in the first example is a support member 120' fixed to the casing 10. However, the support member 120' does not slide left or right as in the previous example, but the internal stopper 100,
This example is similar to the first example in that it includes a leaf spring 125 and the like. Lock bolt 150 in this example
is positioned in cooperation with the internal stop 100, like the cam 112 in the first example. However, in the locked state, the leg portion 151 is in a position removed from the recess 102 of the internal stopper to the left (top of the diagram), and the internal stopper 100 is moved to the left (top of the diagram) by the contact piece 46 of the slide plate 40. It is provided in such a position that it can enter into the recess 102 when it is moved. The lock bolt 150 is guided by the casing 10 and the contact portion 126 of the support member and is slidable up and down, and its right end portion is a hook 152 that extends upward and engages with the tip hook portion of the shackle 140. There is. rock bolt 150
is biased upward by a compression coil spring 153. The casing 10 includes a rod-shaped operating section 1.
70 is mounted so as to be able to slide up and down and is biased upward by a spring, and the lower end of the operating section is in contact with the lock bolt 150.

This padlock is similar to the first example with respect to the unlocking operation that makes the lock bolt 150 movable, and this operation causes the internal stopper 100 to move to the second
From the state shown in FIG. 7, it is moved to the left (upward in the diagram). Movement of the lock bolt 150 is obtained by subsequently pressing down on the operating portion 170. As a result, the lock bolt 150 passes the leg 151 through the recess 102 and descends, removing the hook 152 from the hook of the shackle 140, and the shank 140 flies out to the right (upward in the figure) based on the spring force. The locking operation is the same as a normal padlock.

As can be understood from these examples, the locking mechanism of the present invention can be applied to locks having various structures for moving the lock bolt to the unlocked position.

Effects of the Invention As is clear from the above, according to the present invention, it is possible to provide a push-button locking mechanism that has the following effects. That is, the tumbler plate that is moved by the pushbuttons is provided with a transverse groove located at a position that cooperates with the pushbuttons only when the pushbuttons are pushed in the proper order, and the slide member that is raised together with the tumbler plate is , it is possible to move the lock bolt to the unlock position when reaching the highest position, so the lock can be unlocked only if both the combination of buttons to be operated and the order of operations are correct.
Even if the number of push buttons is small, it is possible to strictly prevent unauthorized lock opening. In addition, due to unauthorized operation, the tumbler plate moves to the right and moves the detent member, creating a state in which the tumbler plate does not rise even if the push button is operated. The lock is effectively prevented.

[Brief explanation of the drawing]

The figures show an example of a lock equipped with the locking mechanism of the present invention. Fig. 1 is an exploded perspective view of the main body side of the locking device attached to the wheel disk of an automobile, and Fig. 2 is an exploded perspective view of the locking device. Figure 3 is a perspective view showing the slide plate and tumbler member in an exploded state; Figure 4 is a perspective view showing the lock bolt and associated members in an exploded state. Figures 5 to 8 are rear views of the main parts of the locking device, showing the rising state of the slide member in sequence during the unlocking operation, and Figures 9 to 1 are rear views of the main parts of the lock device;
Figure 2 is an explanatory diagram of the operation of the blade and tumbler plate, Figures 13 to 15 are front views of the main parts of the lock device showing each step of the unauthorized unlocking operation and its reset operation, and Figure 16. 19 are explanatory diagrams of the operation of the blade and tumbler plate (main plate and sub-plate), FIGS. 20 to 22 are rear views of the main parts of the lock device showing the moving states of the lock bolt in order, and FIG. Figure 24 is a front view of an automobile tire equipped with this locking device, Figure 24 is a longitudinal sectional front view of the center of the wheel disc portion of the tire shown in Figure 23, Figure 25 is a longitudinal sectional side view thereof, and Figure 26 is a lock according to the invention. FIG. 27 is a front view showing the inside of an example of a padlock equipped with the mechanism, and FIG. 27 is a front view showing the inside of another example of the padlock. 1... Lock device, 10... Casing, 20
... Push button, 21 ... Operation button, 30 ... Blade, 40 ... Slide plate, 41 ... Opening, 5
0...Tumbler board, 52a, 52b, 52c, 5
2d...Vertical groove, 53a, 53b, 53c, 53d
... Horizontal groove, 80 ... Detent member, 100 ... Internal stopper, 101 ... Engagement part, 110 ... Actuation part, 120 ... Lock bolt (det bolt),
125...Plate spring, 140...Shackle, 16
0... Operating unit, 170... Operating unit, 200... Tire, 201... Wheel disc, 202...
Fukuro Natsuto.

Claims (1)

[Scope of Claims] 1. A push-button locking mechanism in which a lock bolt can be moved to a locked state and a movable state to an unlocked position by moving an internal stopper, comprising: a casing that accommodates the internal stopper and the lock bolt; a plurality of push buttons elastically protruding from a substantially flat surface; and a plurality of blades coupled to the push buttons and each movable back and forth within the casing when the casing is vertically positioned with the flat surface facing toward you. a slide plate that is slidable while being guided in the vertical direction within the casing and has an opening through which each of the blades can pass at any sliding position; a tumbler plate that can slide in left and right positions; and a tumbler plate that is guided in the vertical direction within the casing to be slidable and engages with the slide member to move the slide member downward when lowered from the raised position. a reset member; and a reset operation button connected to the reset member and extending outside the casing for vertically moving the reset member; The tip side has a square pyramid shape with a right side surface that slopes to the left, a lower surface and a left side surface that extend vertically and horizontally to the tip, and the tumbler plate is provided corresponding to each of the blades and can freely control the blades. a plurality of vertical grooves extending in the vertical direction and having a width that allows the passage to reach the bottom of the square pyramid shape at the upper and lower positions of the blade; the tumbler plate is supported by the slide plate, and includes a plurality of lateral grooves having a vertical width corresponding to The tumbler plate is elastically held at a position moved to the left by an elastic member, and in the tumbler plate in the held state, the right end edge of the lateral groove is located to the right of the right side surface of the blade. , the upper edge of the first lateral groove is such that the upper edge of the first lateral groove cooperates with the first blade coupled to the push button to be pressed at the beginning of the unlocking operation, and the upper edge of the first lateral groove is at the tip of the inclined upper surface of the blade. The upper end edge of the second lateral groove is in contact with the upper end of the second lateral groove in the tumbler plate when the tumbler plate is raised based on the slope of the upper surface of the blade due to entry of the blade into the first lateral groove. The tumbler plate is provided so that the edge is in contact with the tip of the inclined upper surface of the second blade, and the upper edge of each of the third and subsequent lateral grooves is also connected to the tumbler plate as the blade enters the lateral groove preceding the lateral groove. The horizontal grooves in the tumbler plate are provided in sequence so that when the tumbler plate is further raised, the horizontal grooves are in contact with the tips of the inclined upper surfaces of the corresponding blades, and the right edge of the vertical grooves A detent member is mounted on the slide plate and is elastically movably supported, and the detent member prevents the tumbler from moving to the left. When in the holding position, the tumbler holds the tumbler in the non-operating position against the elastic force, and when the tumbler moves to the right, the tumbler moves to the operating position based on the elastic force and returns to the left position of the tumbler. When the reset member is lowered, the reset member contacts the reset member and is moved to the non-operating position again. The push button type is characterized in that it is provided with an engaging portion for moving the internal stopper by contacting a part of the slide plate when the slide plate reaches the uppermost position. Lock mechanism.