JPH033789B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a digital lock configured to be unlocked by pressing several push buttons inscribed with numbers, letters, symbols, etc. in a certain order.

Digital locks, which are unlocked by pressing several push buttons in a certain order, are extremely convenient because there is no need to carry a key around, and there is no need to turn and unscrew the grip as with multi-lock locks. It is conceivable to create such digital locks using microcomputer devices, but since microcomputer devices are sensitive to moisture and heat, locks with built-in microcomputer devices are limited in the places they can be used, and locks are difficult to miniaturize and are expensive. In addition, a battery of considerable capacity is required, and care must be taken to check the battery.

The purpose of the present invention is to provide a digital lock that solves these problems, and includes several push buttons, a return button, and an opening button using a claw piece, a locking piece, a return link, a locking plate, and a locking button. A digital lock is constructed by linking parts such as plates and locking keys, and by combining these parts and using only mechanical means, and when the push buttons are pressed in a certain order and the open button is pressed, the lock piece releases. If the button comes off and the lock can be unlocked, and the wrong push button is pressed, the locking plate will catch on the locking key and prevent the lock from being unlocked.In this case, by pressing the return button and raising the return link,
By making it impossible to open the lock unless the locking plate and locking key are removed, we have developed a digital lock that is compact, easy to use, durable, and convenient.

An embodiment of the present invention will be described with respect to a padlock.

In the embodiment shown in FIGS. 1 to 6, 10 is a padlock case, which is made in the shape of a flat rectangular tube, has a closed top surface, and has three recesses 11 facing each other on the longitudinal side of the bottom edge. Six push buttons 1 to 6 with numbers "1" to "6" engraved on the bottom surface 12 are arranged in two rows, front and back, and placed between the recesses 11, 11, and the letter "R" is marked on the right and left sides respectively. An engraved return button 7 and an opening button 8 engraved with the character "0" are arranged. It is also possible to have 10 or more push buttons with numbers 0 to 9 engraved on them, but the mechanism becomes too complicated if there are too many push buttons, and even with 6 push buttons, the number of different keys will be enormous. , there is no need to push so many buttons. 1
3 is a lock rod curved in a J-shape, the tip of which has a notch 14 enters and exits a through hole 15 on the top surface of the case 10;
A flat surface 16 is provided on the inside near the lower end of the long base, and an annular groove 17 is provided below the flat surface 16. This base is deeply inserted into the right side of the case 10 and secured with a pin 18, and the length of the flat surface 16 is Only lock rod 13 and case 10
At this time, the pin 18 enters the annular groove 17 to allow rotation of the lock rod.

A plate-shaped lock body 2 is located approximately at the rear half of the case 10.
Enter 0. As shown in FIGS. 4, 7, and 11, the lock body 20 is constructed by connecting the bottom surface 12 of the case to the lower edge, making eight button holes 21, and cutting out a semicircular groove 23 in the side wall 22 of the right edge. Insert the base of the lock rod 13 between it and the semicircular groove 19 on the right side wall, and make a recess 25 at the far end of the semicircular groove 23 to receive the push spring 24 of the lock rod.
A vertical slit 26 for a spring insertion is cut in the center, and a slit 27 is provided at the upper end of the slit 26. Lock body 2
0 is made with a thick center bottom and three square spaces 2
8, and house the push buttons 4, 5, 6 of the rear row and the push spring 29 placed in the recess in the end face of these in this space.A band-shaped step 30 is provided along the entire length along the right side wall, and a narrow step is provided at the lower end. A short field wall 31 is raised, and a slightly bent short leg piece 32 of a return button 7 and a push spring 33 are housed between this field wall and the right side wall. Lock body 20
In this case, the lower half 34 near the left edge is made thicker to form the wall 3.
5, and place the straight leg piece 36 and push spring 37 of the open button 8 between this field wall and the left edge, make this leg piece long, and push the tip (upper end) diagonally to the left. A protruding piece 38 is provided. In addition, push buttons 1 to 6 and return button 7
The opening button 8 is shown in FIGS. 13, 14, 15, and 16.

40 is a stop piece for the opening button leg 36, which is attached to the lock body 20 as shown in FIGS.
It is placed in a horizontal groove 41 bored in the middle of the left side of the body, and a spring 42 is inserted into the space on the back side, and the tip (left end) 43 is made into a trapezoidal shape as shown in FIG. This protrusion receives the upper end of the leg piece 36 to stop the opening button 8 from entering, and the stop piece 4
0 moves to the right and the protrusion 44 comes off the leg piece 36, the opening button 8 can be pushed. It is a locking piece installed directly above the 45mm stop piece, and as shown in Fig. 18, the right side of the top end is rounded and the notch 1 of the locking rod is formed.
4, cut out the stepped surface 46 that is caught on the lock body, and attach the end shaft 47 near the lower end to the lock body and the front plate that covers this (described later).
It is fitted into a round hole in the upper left corner of the button so that it can swing.Normally, when the button is in an upright position, the protruding piece 48 at the lower end diagonally to the left is opened and brought into contact with the protruding piece 38 of the button leg.
is caught in the notch 14 of the lock rod and prevents the lock rod 13 from being pulled out.

50 is a sliding plate attached to the center of the lock body 20, as shown in FIG.
This protrusion 52 is fitted into a slit 26 cut in the center of the lock body to guide the vertical movement of the sliding plate. At this time, the tip 43 of the stop piece slides against the left edge of the sliding plate, and the groove 51 and slit A spring 53 extending over 26 tensions the projections 27 and 52 to constantly push down the sliding plate. The sliding plate 50 has a small trapezoidal notch 54 near the lower end of the left side edge, and when the sliding plate moves upward a predetermined length, the notch 54 faces the tip 43 of the stop piece, and at this time the stop The piece is pushed by the spring 42 and moves to the left, and the tip 43 is inserted into the notch 54, so that the protrusion 44 of the stop piece opens and is removed from the upper end of the button leg 36. Reference numeral 60 designates a lock plate stacked on the front surface of the sliding plate 50, which is placed between the upper and lower low edges 55, 55 of the sliding plate, and eliminates lateral deviation by the protrusion 56 on the upper edge and the notch in the lock plate. As shown in FIG. 20, square receiving holes 61 to 66 into which the claws (described later) that engage with push buttons 1 to 6 are inserted and one stopper hole 67 are bored, and this lock plate 60 is replaced. Make a key difference by.

A front plate 68 is placed over the front surface of the lock body 20, and the uneven surfaces of both side edges are fitted together to prevent rattling. As shown in Figures 4, 8, 9, and 12, this front plate has three rectangular cavities 69 in the lower center to house the push buttons 1 to 3 of the front row and the push springs 70 placed in the recesses on the end faces of these. The upper part is made thicker and a side wall is provided in the upper half of the right side, and a slightly deep rectangular recess 71 is carved out in the upper part on the right side of the front side, and a narrow stepped surface 72 is left on both sides of the recess 71, and the middle part on the right side of the front side. A shallow rectangular recess 73 is cut out, a slit 74 is cut on the right side of the recess 73, and a slightly wide convex window hole 75 is cut out in the part where the two recesses 71 and 73 are continuous to communicate the front and back sides.

A thin plate return link 76 is attached to the lower edge of the locking plate 60. The return link 76 has triangular hanging pieces 77, 7 rising from both ends as shown in FIG.
7' are provided with supporting shafts 78, 78, the hanging piece 77 on the right side is made thick, and a part 79 of the upper surface is cut off.
The support shafts 78, 78 are fitted into the recesses 57, 57 in the right side wall 22 and the left side wall 35 of the lock body, and are suspended freely to swing. Reference numeral 58 denotes a spring piece for the return link 76, which is bent into a U-shape as shown in FIG. Link hanging piece 77
Return the lower surface of the button so that it comes into contact with the upper end of the button leg 32. Normally, the return link 76 rests against the lower edge of the lock plate 60, and when the return button 7 is pushed in, its leg piece 32 pushes up the hanging piece 77 against the spring piece 58, so the return link 76 rests on the support shaft 78, While rising up using 78 as a fulcrum, it moves away from the lock plate 60 a little.

As shown in FIGS. 5 and 10, one elongated lock claw 80 and six elongated claw pieces 81 to 86 are arranged side by side along the front surface of the lock plate 60, and these lock claws and claw pieces are connected to the lock plate 60. Return link 7
6 to intervene. As shown in FIG. 23, the lock pawl 80 has a protruding piece 89 rearward at the base end (lower end) and a key-shaped piece 90 bent slightly forward at the distal end (upper end). The key-shaped piece 90 is loosely fitted into the recess 99 on the right side at the lower center of the key-shaped piece 90, and the tip thereof is slightly extended beyond the lock plate 60, so that the key-shaped piece 90 projects forward and upward. As shown in FIG. 24, the claw pieces 81 to 83 have a protruding piece 87 extending forward at the base end and a wedge-shaped claw tip 9 extending backward at the distal end.
1 to 93, and the protruding piece 87 at the base end is connected to the push button 1 in the front row.
Loosely fit it into the half-width recess of No. 3 to 3, and press the push button so that the toes 91 to 93 of the tip are brought into contact with the front surface of the lock plate 60. As shown in FIG. 25, the claw pieces 84 to 86 have rearward protruding pieces 88 at their base ends and rearward wedge-shaped claws 94 to 96 at their tips, and the protruding pieces 88 at the base end are connected to the push buttons 4 in the rear row. Loosely fit it into the half-width recess of ~6, link it to the push button, and place the tip claws 94-96 against the front surface of the lock plate 60. A comb-shaped spring piece 94 is attached to the back surface of the front plate 68 and serves to press down the lock pawl 80 and the pawl pieces 81 to 86 to prevent them from lifting up. Reference numeral 98 denotes a short protrusion provided on the back surface of the front plate 68, which lightly contacts the lock plate 60 at the portion without the claw piece and serves to prevent the lock plate 60 from lifting up.

Here, the positions of the receiving holes 61 to 66 on the lock plate are related to the order in which the push buttons 1 to 6 are pressed, and in this embodiment, as shown in FIG.
has fallen into the receiving hole 61, and when the push button 1 is pressed, the lock plate 60 moves one pitch (the amount the push button is pressed) together with the sliding plate 50, and at this time the toe 92 falls into the receiving hole 62. When push button 2 is pressed a second time, the lock plate 60 moves one pitch. At this time, the toe 9
6 falls into the receiving hole 66, so when push button 6 is pressed third, the lock plate 60 moves one pitch, and at this time, the toe 93 falls into the receiving hole 63, so when push button 3 is pressed fourth, the lock plate 60 moves one pitch. moves one pitch. At this time, the toe 95 falls into the receiving hole 65, so when the push button 5 is pressed fifth, the lock plate 60 moves one pitch.
At this time, the toe 94 falls into the receiving hole 64, so when the push button 4 is pressed sixth, the lock plate 60 moves one pitch. When push buttons 1, 2, 6, 3, 5, and 4 are pressed in this order, the lock plate 60 moves a total of 6 pitches together with the sliding plate 50, and as a result, the notch 54 in the sliding plate is moved. Since it is directed toward the tip 43 of the stop piece, the stop piece 40 moves to the right, allowing the opening button leg 36 to move and opening the lock. When the lock plate 60 moves six pitches, the toe 93 falls into the stop hole 67 formed in the lock plate 60 to hold the lock plate 60 and the sliding plate 50 in the moving position. Note that this stop hole is located at the tip of the toe 91-9.
It may be provided for any of 6.

A rectangular locking plate 100 is fitted across the recesses 71 and 73 on the front surface of the front plate 68 and the window hole 75, leaving a gap C equal to the pushing amount of one pitch of the push buttons 1 to 6 at its upper edge. Allows movement upwards. Locking plate 1
00 has a rectangular hole 101 cut out almost completely in the upper half and a slit 1 in the center of the lower half.
02 and fit the protrusion 103 protruding from the shallow recess 73 of the front plate 68 and the tension spring 104.
Push down the locking plate 100 so that there is always a gap C at its upper edge. The locking plate 100 is made with a thick upper edge 105 on the back side, aligned with the deep recess 71 of the front plate, cut off both ends of the thick part, placed on the step surfaces 72, 72, and placed in the center of the back side of the thick part. A protrusion 106 is provided and fitted into a groove 107 cut in the center of the recess 71 of the front plate.

Reference numeral 110 denotes an intermediary piece loosely fitted into the rectangular hole 101 of the locking plate.As shown in FIG. Recess 10 on the upper edge of the square hole 101
8 and a presser pin 112 is placed thereon, the intermediary piece 110 is supported in a freely swingable manner using the protrusions 111, 111 as fulcrums, and its front surface is pressed by a spring piece 113 attached to the locking plate 100. Both ends 114, 114 of the lower edge of the intermediate piece 110 protrude long to the side, and by bending the midsection toward the rear, this lower edge fits into the window hole 75 of the front plate, and the front side is pressed by the spring piece 113. The lower edge will protrude to the rear of the front plate,
The protrusions 114, 114 on the lower edge face the rear surface of the locking plate 100 with some gap. Claw pieces 81-86
has its upper end facing the lower edge of the intermediary piece 110, and the lock claw 80 has its upper end key-shaped piece 90 facing the slit 7 of the front plate.
4 and place it on one piece at the bottom edge of the intermediate piece.

115 is a horizontal groove cut on the upper surface of the front plate 70, which communicates with a split groove 107 cut in the center of the recess 71, so that when the locking plate 100 moves upward and closes the gap C, the protrusion 106 is inserted into the horizontal groove 115. rush into. 116 is a locking key which has a notch 117 near the rear end as shown in FIG. , normally the notch 117 is the groove 1 of the front plate.
07, and can move backward in the horizontal groove against the force of the spring 118. In this state, the locking piece 45 is rotatable to the right, and the protrusion 1 of the locking plate
06 enters the horizontal groove 115, it is caught in the notch 117 and prevents the locking key 116 from retreating, so that the locking plate 45 becomes unable to rotate.

When the wrong push button is pressed, the upper end of the claw presses the lower edge of the intermediate piece 110, and the intermediate piece springs 10.
4 moves upward together with the locking plate 100, so the lock pawl 80 pressed by the spring piece 97 moves rearward, and the key-shaped piece 90 catches and locks the lower edge of the intermediate piece 110. The plate 100 is held in a moving position with a gap C closed. At this time, the protrusion 106 of the locking plate catches the notch 117 of the locking key to stop its retreat, so the locking piece 45 is prevented from rotating and cannot be unlocked. Next, when the return button 7 is pressed to raise the return link 76, the lock pawl 80 moves forward, and the key-shaped piece 90 is inserted into the slit 74 of the front plate and the intermediate piece 110 is removed.
Since the locking plate 100 is separated from the lower edge of the spring 104
Due to the elasticity of the intermediary piece 110, it moves downward and returns to its normal state with the key-shaped piece 90 of the locking pawl placed on its lower edge, and the protrusion 106 of the locking plate disengages from the locking key 116 to open the lock. Operation becomes possible. At this time, the claw pieces 81-86 also move away from the lock plate 60 all at once, cutting off the relationship between the receiving holes 61-66 and the claw tips 91-96.

An example of a padlock that implements a digital lock according to the present invention has the above-mentioned configuration. To assemble this padlock, first attach the push buttons 4 to 6 in the rear row, the return button 7, the opening button 8, the stop piece 40, and the lock main body 20. Incorporate the piece 45 and these push springs 29, 33, 37, 42, place the sliding plate 50 on which the lock plate 60 is stacked on the center of the lock body, insert the spring 53 into the groove 51 and the slit 26, and then close the lock plate. Return link 7 to the lower edge of
6 and fit the supporting shafts 78, 78 into the left and right recesses 57, 57 of the lock book, and the return link 76 is suspended on the front surface of the lock plate 60 so that it can swing freely. Next, lock claw 80 and claw pieces 81 to 86 are attached to the front of the lock plate.
are arranged side by side on the left and right, and the protrusions 89 of the lock pawls are fitted into the recesses 99 on the right side of the lock body, and the protrusions 88 of the pawl pieces 84-86 are fitted into the recesses of the push buttons 4-6, and the lock plate 60 and these locks are A return link 76 is interposed between the claw 80 and the claw pieces 81 to 86 to adjust the claw pieces 81 to 86 to predetermined positions.

Next, the front plate 68 incorporating the push buttons 1 to 3 in the front row and the push spring 70 is stacked on the lock body 20, and the uneven edges of both are fitted together, and the protruding pieces 87 of the claw pieces 81 to 86 are attached to the push buttons 1 to 3 in the front row. At the same time, the front plate holds down the support shafts 78, 78 of the return link, and the comb tooth-shaped spring pieces 97 attached to the back of the front plate hold down the lock pawl 80 and the pawl pieces 81 to 86 to secure the toes 91 to 96. Place it on the lock plate 60, prevent the lock plate 60 from lifting up with the protrusion 98 on the back of the front plate, insert a U-shaped spring piece 58 into the cut-out surface 59 of the front plate, and return the hanging piece 7 of the link.
7 is returned and brought into contact with the button leg 32. Next, fit the intermediary piece 110 into the rectangular hole 101 of the locking plate, put the protrusions 111, 111 on the upper edge and the presser pin 112 into the recess on the edge of the hole to pivot the intermediary piece, and move the intermediary piece backward at the midsection. By bending the lower edge of the window hole 75 in the front plate.
the protrusions 114, 114 on the lower edge of the locking plate 1.
An intermediary piece 110 is supported so as to be freely swingable back and forth toward the back surface of 00.

The locking plate 100 with the intermediary piece 110 pivotally supported in this manner is placed in the recesses 71 and 73 of the front plate, and the spring 113 attached to the locking plate presses the intermediary piece, thereby moving the lower edge of the intermediary piece to the front plate 68. Insert the spring 104 into the slit 102 of the locking plate and push down the locking plate 100 so that the tips of the claw pieces 81 to 86 face the lower edge of the intermediary piece 110. Put the key-shaped piece 90 at the tip into the slit 74 of the front plate, place it on the front of the lower edge of the intermediary piece 110, and insert the key-shaped piece 90 into the slit 74.
This allows the lock pawl 80 to move back and forth with some leeway.

Next, insert the push spring 24 of the lock lever into the recess 25 of the lock body, fit the locking key 116 and push spring 118 into the horizontal groove 115 on the top of the front plate, and place the front plate 68 and lock body 20, which are stacked one on top of the other, into the case. 10, insert the lock rod 13 from the top of the case, push its base fully into the semicircular groove 23 of the lock body,
Insert pin 1 into the pin hole drilled in the side wall of case 10.
8, firmly insert it into the stop hole 120 of the lock body, and swage both ends of the pin to fix the lock body 20 and front plate 68 to the case, so that this pin crosses the upper end of the flat surface 16 of the lock plate. The lock plate 13 can be pulled out.

In this embodiment, normally the locking plate 100 is the spring 1
04 to create a gap C at the upper edge, and the protrusion 1
06 is withdrawn from the notch 117 of the locking key to enable the locking key 116 to be retracted. In this state, when the tip of the lock rod 13 is pushed into the through hole 15 of the case, the lock lever advances with the locking piece 45 tilted to the right, and when the tip of the locking rod is fully inserted, the locking piece 45 engages. Stop key 1
17 and caught in the notch 14, locking rod 13
This prevents the user from removing the lock and secures the locked state.

When attempting to unlock the lock, push buttons 1 to 6 in a predetermined order. That is, in this embodiment, the toe 91 is depressed into the receiving hole 61 of the lock plate, so the push button 1 is pressed first. When this push button is pressed, the lock plate 60 moves one pitch (the amount by which the push button is pressed) together with the sliding plate 50, and at this time, the toe 92 falls into the receiving hole 62, so when push button 2 is pressed second, the lock is Board 60 is toe 9
1 from the receiving hole 61 and moving one pitch, and at this time the toe 96 falls into the receiving hole 66. When the push button 6 is pressed third, the lock plate 60 moves the toe 92 into the receiving hole 6.
Pull out from 2 and move 1 pitch, at this time the toe 9
3 falls into the receiving hole 63, so when push button 3 is pressed fourth, the lock plate 60 pulls the toe 96 out of the receiving hole 66 and moves one pitch. At this time, the toe 95 falls into the receiving hole 65, so when push button 5 is pressed fifth, the lock plate 60 pulls the toe 93 out of the receiving hole 63 and moves one pitch, and at this time, the toe 94 falls into the receiving hole 64. When the push button 4 is pressed the sixth time, the lock plate 60 pulls out the toe 95 from the receiving hole 65 and moves one pitch.

By pressing the push buttons 1, 2, 6, 3, 5, and 4 in this order, the lock plate 60 is moved from the sliding plate 5.
As a result, the notch 54 of the sliding plate moves toward the tip 43 of the stop piece, so the stop piece 40 moves to the right by the push spring 42 and moves the tip 43 of the sliding plate. Insert it into the notch 54, open the protrusion 44 near the tip, and remove it from the tip of the button leg 36 to allow its movement. When the lock plate has moved six pitches, the toe 93 falls into the stop hole 67 in the lock plate to hold the lock plate 60 and sliding plate 50 in the moving position. When the opening button 8 is pushed in, the protrusion 38 at the tip of the leg tilts the locking piece 45 to the right, causing the locking piece 4
6 is removed from the notch 14 of the lock rod, the lock rod 13 can be removed from the case 10 and the lock can be unlocked. When the lock rod 13 is fully pulled out, the pin 18 enters the circular groove 17 at the base end, allowing the lock rod to be rotated. After pulling out the lock rod 13, push the return button 7 to raise the return link 76, move the claws 81 to 86 away from the lock plate 60, break off the relationship between the claws 91 to 96 and the lock plate 60, and release the slide by the spring 53. The moving plate 50 and lock plate 60 are lowered to return to the normal state.

If you accidentally press an unspecified push button when unlocking, the tip of the claw presses the lower edge of the intermediary piece 110, and the intermediary piece moves upward together with the locking plate 100 against the spring 104, and the spring Lock claw 80 pressed by piece 97
moves rearward and receives the lower edge of the intermediary piece with its key-shaped piece 90, thereby holding the locking plate 100 in the moving position with the gap C closed. At this time, the protrusion 106 of the locking plate enters the horizontal groove 115 and catches on the notch 117 of the locking key, stopping its retreat, so that the locking piece 45 is prevented from rotating and cannot be unlocked. In this case, when the return button 7 is pressed and the return link 76 is raised, the lock claw 8
0 moves forward and inserts the key-shaped piece 90 into the slit 7 of the front plate.
4 and away from the lower edge of the intermediary piece 110, the locking plate 100 is moved by the elasticity of the spring 104 into the intermediary piece 11.
0, and returns to the normal state with the key-shaped piece 90 of the lock pawl placed on its lower edge, and the protrusion 106 of the locking plate is disengaged from the locking key 116, allowing unlocking operation. .

The above is an example of a padlock in which the digital lock according to the present invention is implemented, and the present invention is not limited to this embodiment, and the design can be changed within the gist of the invention. You can play with some of them and apply them to locks other than padlocks.

In the present invention, several push buttons, a return button, and an opening button are replaced with a claw piece, a lock piece, a return link, a lock plate,
A digital lock is constructed by linking parts such as a locking plate and a locking key, and by combining these parts with only mechanical means, and locks when the push buttons are pressed in a certain order and then the open button is pressed. The piece comes off and the lock can be unlocked,
If you press the wrong push button, the locking plate will catch on the locking key and prevent the lock from being unlocked. In this case, by pressing the return button and raising the return link, the lock will open unless the locking plate is removed from the locking key. This digital lock is compact, easy to use, durable, and convenient because it is made impossible to operate and can be unlocked only by mechanical means and actions, and it prevents unlocking in the event of erroneous operation and releases this inhibition. It has the effect of providing

[Brief explanation of the drawing]

The drawings show an example of a padlock in which the digital lock according to the present invention is implemented. Figure 1 is a front view of the embodiment with the front of the case cut away, Figure 2 is a bottom view of the embodiment, and Figure 3 is a diagram of the embodiment. 1 is an enlarged cross-sectional view taken along line A-A in Figure 1, Figure 4 is a sectional view taken along line B-B in Figure 1, Figure 5 is a front view of the embodiment with the front plate removed, and Figure 6 is the front plate and claw pieces. Figure 7 is a front view of the lock body, Figure 8 is a front view of the front plate, Figure 9 is a rear view of the front plate, and Figure 10 is the relationship between the lock plate and the claw piece. Fig. 11 is a perspective view of the lock body, Fig. 12 is an enlarged front view showing the lock body.
The figure is a perspective view of the front plate, Figures 13 and 14 are perspective views of the push button, Figure 15 is a perspective view of the return button, Figure 16 is a perspective view of the opening button, and Figure 17 is a perspective view of the stop piece. , Fig. 18 is a perspective view of the locking piece, Fig. 19 is a perspective view of the sliding plate, Fig. 20 is a perspective view of the locking plate, and Fig. 20 is a perspective view of the locking plate.
Fig. 1 is a perspective view of the return link, Fig. 22 is a perspective view of the U-shaped spring piece, Fig. 23 is a perspective view of the lock pawl, Figs. 24 and 25 are perspective views of the pawl piece, and Fig. 26 is a perspective view of the U-shaped spring piece. FIG. 27 is a perspective view of the stop plate, and FIG. 27 is a perspective view of the intermediate piece.
FIG. 8 is a perspective view of the locking key. Note that 1 to 6 are push buttons, 7 is a return button, 8 is an open button,
10 is a case, 12 is an end plate thereof, 13 is a lock lever, 1
8 is the pin, 20 is the lock body, 32 is the return button leg,
36 is an opening button leg, 38 is a protruding piece thereof, 40 is a stop piece, 43 is a tip thereof, 45 is a locking piece, 48 is a protruding piece, 50 is a sliding plate, 54 is a notch, 58 is a spring piece, 59 is the cut surface of the front plate, 60 is the lock plate, 6
1 to 66 are receiving holes, 68 is a front plate, 71 and 73 are recesses, 75 is a window hole, 76 is a return link, 77 and 7
7' is a hanging piece, 80 is a lock pawl, 81 to 86 are pawl pieces, 87 and 88 are protruding pieces thereof, 89 is a protruding piece of the lock pawl, 90 is a key-shaped piece thereof, 91 to 96 are toe tips, 97
98 is a comb-shaped spring piece, 98 is a protrusion, 99 is a recess in the lock body, 100 is a locking plate, 101 is a square hole, 1
04 is a spring, C is a gap, 106 is a projection of a locking plate,
107 is a split groove, 110 is an intermediate piece, 113 is a spring piece, 115 is a horizontal groove, 116 is a locking key, 117 is a notch thereof, and 118 is a push spring.

Claims (1)

[Claims] 1. Insert a plate-shaped lock body and a front plate placed over it into a flat case, fix with pins, connect the end plate of the case to the lock body or front plate, and attach several push buttons to this end plate. A return button and an opening button are arranged, and a stop piece is movably provided at the end of the long leg of the opening button to stop its entry. At the same time, the tip of the open button leg is engaged with the protruding piece, and the lock plate for changing the key is overlapped and interlocked with the vertically movable sliding plate along the lock body, and the sliding plate Alternatively, provide a notch on the side edge of the lock plate to receive the short end of the stop piece when the lock plate moves a predetermined length, and attach a narrow return link to the lower edge of the lock plate, so that the hanging pieces at both ends Insert a spring piece into the cut-out surface of the front plate, bring one hanging piece into contact with the leg piece of the return button, and connect the lock pawl and several pawl pieces to the front of the lock plate through the return link. Place the protrusions on the front plate and press them with the comb-shaped spring piece on the back of the front plate, loosely fit the protrusion at the base of the lock pawl into the recess at the bottom center of the lock body, and press the protrusion at the base of each pawl on the push button. Loosely fit it into the recess and place the wedge-shaped toe against the lock plate, and create a hole in the lock plate into which the toe of one push button is placed, and a receptacle in which the toe of one push button is received in sequence when the remaining push buttons are pressed in a predetermined order. Drill a hole so that the lock plate and sliding plate move one pitch at a time with each push button, moving a predetermined length in total, and at this time, the stop piece inserts its tip into the notch in the sliding plate and opens. It is set to allow the entry of the button leg, and when the opening button leg enters, the locking piece comes off the lock lever, making it possible to open the lock.A rectangular recess is cut out at the top and midsection of the front of the front plate, and the lock is opened in the middle. Cut out a window hole leading to the back of the locking plate, press down the rectangular locking plate placed in this recess with a spring, leave a gap on the upper edge equal to the amount of push of one push button, and then Provide a protrusion on the upper edge and fit it into the groove cut in the recess of the front plate, cut a square hole almost completely in the upper half of the locking plate, loosely fit the intermediary piece, and then The edge is pivoted and the midsection is bent to the rear to fit the lower edge into the window hole of the front plate, and the front of the intermediate piece is pressed by a spring piece attached to the front plate so that the lower edge protrudes to the rear of the front plate. The tip of each pawl piece faces this lower edge, and the key-shaped piece at the tip of the lock pawl is placed on it, and a lateral groove communicating with the split groove of the front recess is cut on the top surface of the front plate to form a lock having a notch. Insert the key and push spring, and place the tip of the locking key against the back of the above-mentioned locking piece so that the notch faces the split groove in the front plate, so that when you press the wrong push button, the upper end of the claw piece will mediate. The locking plate is moved through the locking tab, and its protrusion is hooked on the notch of the locking key to prevent the locking key from moving back, making it impossible to open the lock. This digital lock is characterized in that the locking plate is held in a moving position by receiving the piece, and when a return button is pressed, the return link releases the locking pawl from the intermediary piece and returns to the normal state.