GB2343481A - Push-button lock with combination reset - Google Patents

Abstract

A push-button lock has locking pins <B>2</B> certain of which (code pins) must be depressed to allow sliding movement of a plate <B>4</B> by a handle <B>71</B>. Each pin has an upper <B>22</B> projection which engages in a slot <B>41</B> of plate <B>4</B> when the pin is depressed and a lower <B>23</B> projection which otherwise engages in the slot <B>41</B>. The projections have the same shape but extend in opposite directions from the pin axis and the direction determines whether the projection interacts with the slot <B>41</B> to allow or block movement of the plate <B>4</B>. Each pin can be rotated through 180 degrees (from the rear of the lock eg by a screwdriver) and the required code pins are turned to align the upper projection <B>22</B> to the non-blocking direction (consequently setting the lower projection to the blocking direction).

Description

NUMERAL LOCK WITH RESETTABLE FEATURE BACKGROUND OF THE INVENTION The present invention relates to numeral lock for a door, and the like, and especially to a numeral lock mechanism which has pin numbers capable of being reset so that the user can change the pin numbers to a predetermined set of numbers according to his/her demand.

One purpose of using a numeral lock is to lock and unlock the door lock without having to use a key, eliminating the risk of losing the key after locking the lock.

One kind of numeral lock that is often used has several push buttons, each of which has a corresponding numeral. When the correct one of the push buttons are pressed by the user, i. e. the corresponding numbers of the pressed push buttons are the same as the predetermined pin numbers, the door lock can be unlocked.

Furthermore, one main purpose of devising a numeral lock with resettable pin numbers is to prevent a thief to become aware of the pin numbers by means of observing the push buttons to tell ones with corresponding numerals same as the numerals of the pin number from the others in light of the fact that push buttons with pin numerals, being constantly pressed by the user's fingers, have more polished surface than the others. Therefore, it is very important to develop a kind of numeral lock with resettable pin numbers to overcome the above said disadvantages and to provide homes or offices more security.

A heretofore known numeral lock with resettable pin numbers, referring to Figs. 18 and 19, consists of a lock 10, an outside housing 101, an inside cover 20, a knob 30 as the main parts; the lock 10 is housed within the outside housing 101 and fixed to outer side of a door 40 ; the knob 30, operationally associated with a dead bolt 301, is provided for permitting a user to lock or unlock the door 40.

The outside housing 101 of the lock 10 has plurality of rectangular holes 102 each represented with a numeral or a symbol.

Each rectangular hole 102 houses a respective rectangular push button 103, one of the rectangular push buttons 103 is provided for permitting the push buttons 103, after pressed downwardly, to recover their original position (we name this button clear button).

Each rectangular push button 103 has a cylindrical hole, housing a respective spring 106 therein. Furthermore, a main body 104 is housed within the outside housing 101; referring to Fig. 19, the main body 104 has plurality of through holes 105 each corresponding to a respective one of the rectangular holes 102 of the outside housing 101. Each through hole 105 is inserted with a respective locking chip 50. The locking chips 50 have two kind of shapes; those 50 of the first kind have each a first gap 501 provided at one side at upper portion thereof and two second gaps 502 provided at the other side thereof; the other kind of locking chips 50 have each a first gap 501 at one side at lower portion thereof and two second gaps at the other side as shown in Fig. 20. Each locking chip 50 has a slope hook 503 between the second gaps 502 thereof.

An engaging member 60 is housed inside the outside housing 101; referring to Figs. 20 and 21, the engaging member 60 has plurality of resilient hooked members 601 each corresponding to an adjacent slope 501 of the locking chip 50.

Furthermore, an engaging plate 70 is provided within the outside housing 101, having an engaging gap set 701, which consists of plurality of engaging gap 702; in combination, the engaging gaps 702 are each operationally associated with a respective locking chip 50 whereby the locking chips 50, which have the upper gaps 501, can engage the engaging plate 70. On the other hand, those locking chips 50, which have the lower gaps 501, do not engage the engaging plate 70, i. e. the engaging plate 70 can pass through the lower gaps 501.

In combination, referring to Fig. 20, the locking chips 50 are mounted on the respective rectangular push buttons 103 and spring 106 at one end, and mounted on respective springs 107 at the other end.

Finally, a bottom plate 108 is fixed to the outside housing 101, and the lock is fixed to the door. Because there are two kinds of locking chips 50 as earlier mentioned, the user has to press those of the push buttons 103 operationally associated with those locking chips 50 having upper gaps 501 such that the upper gaps 501 can communicate with the engaging gaps 702 of the engaging member 60, i. e. the engaging member 60 disengage from the locking chips 50 with upper gaps 501. The pressed locking chips 50 will engage the resilient hooked members 601 of the engaging member 60 from the slope hooks 503 thereof and will not move upward until the clear button is pressed.

Thus, after the engaging plate 70 disengage from the locking chips 50, the knob 30 can be turned to retreat the dead bolt 301 to unlock the door.

To reset the pin number, the user first has to remove the lock 10 from the door 40, and remove the bottom plate 108 and the springs 107 from the lock 10. Then the user has to remove the locking chips 50 from the through holes 105 of the main body 104 with a tweezers.

Finally, the two kinds of locking chips 50, i. e. with upper gaps 501 and lower gaps 501, are inserted into the through holes 105 according to a newly determined set of numerals; those locking chips 50 with upper gaps 501 have to be inserted into positions which correspond to numerals of the new pin number. Finally, the lock with the new pin number is again fixed to the door.

However, it is found that the above mentioned numeral lock has following disadvantage.

1. In resetting the numeral locks, it is likely that the user forgets the positions where the locking chip 50 with upper gaps 501 are inserted and has to inspect or remove the locking chips 50 again, making the resetting action very labor costing.

2. The user has to use a tweezers to remove the locking chips 50, because the through holes 105 are very narrow, making the resetting activity very inconvenient.

3. The springs 107 are likely to get lost in removing process.

4. The locking chips 50 can not be removed easily because the slope hooks 503 thereof will engage the resilient hooked members 601 of the engaging member 60 in removing process; and moreover, the locking chips 50 are likely to wear away and get deformed after many times of resetting process.

5. The rectangular push buttons, being rectangular, have to be disposed suitably in order for the outside housing 101 to mount thereon easily. So, it is not very easy for the production line worker to assemble the same.

Therefore, it is a main object of the present invention to provide a numeral lock which can be reset very easily.

SUMARY The present invention relates to a numeral lock with resettable features, and particularly one that can be reset very easily, not having to dismantle the lock.

The numeral lock mainly comprises an engaging plate having several locking holes thereon; each locking hole is inserted with a locking pin having an upper engaging protrusion and a lower engaging protrusion. Both engaging protrusions have same shape but are arranged in opposite direction, and the locking pins can be turned by a screwdriver to arrange position of the engaging protrusions thereof; when an upper engaging protrusion faces inward, i. e. the corresponding lower engaging protrusion faces outward, the upper engaging protrusion will engage the corresponding locking hole to stop the engaging plate from moving. To unlock the lock, i. e. to disengage the above said upper engaging protrusion from the locking hole, one has to depress the locking pin; thus, the lower engaging protrusion thereof will be received within the corresponding locking hole, not able to engage the locking hole due to its direction. On the other hand, those locking pins, which have their upper engaging protrusions facing outward, do not have to be depressed for permitting the lock to be unlocked because such upper engaging protrusions do not stop the engaging plate from moving.

To reset the number back, one only has to turn the locking pins with a screwdriver according to his/her predetermined pin numbers; the corresponding numerals of those locking pins with upper engaging protrusions facing inward become the pin number.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be better understood by reference to the drawings, wherein: Fig. 1 is an exploded perspective view of a numeral lock of the present invention; Fig. 2 is a perspective view of a locking pin of the present invention; Fig. 3 is a perspective view of a confining plate of the present invention; Fig. 4 is a bottom view of a covering block and an associated activating rod of the present invention; Fig. 5 is a perspective view of the covering block and the associated activating rod of the present invention; Fig. 6 is a sectional view of the numeral lock of the present invention; Fig. 7 is another bottom view of the covering block and the associated activating rod of the present invention ; Fig. 8 is a cross-section view of the numeral lock of the present invention; Fig. 9 is a front view of the numeral lock of the present invention with the engaging plate fitted thereto; Fig. 10 is a view of the numeral lock of the present invention with the locating plate fitted thereto; Fig. 11 is a side view of the numeral lock of the present invention, when fitted to a door ; Fig. 12 is a top view of the numeral lock of the present invention, when fitted to a door ; Fig. 13 is a section view of the numeral lock with a depressed press button; Fig. 14 is a view of the numeral lock with press handle being turned; Fig. 15 is a view showing the movement of the activating rod when the indoor. handle is depressed; Fig. 16 is a view showing a recovering button which is not depressed; Fig. 17 is a view showing the recovering button, which is depressed ; Fig. 18 is a front view of a prior art numeral lock as described in the Background ; Fig. 19 is a sectional view of the prior art numeral lock; Fig. 20 is a cross-sectional view of the prior art numeral lock; and, Fig. 21 is a sectional view of the prior art numeral lock.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A numeral lock of the present invention, referring to Fig. 1, consists of a housing 1, plurality of locking pins 2, a confining plate 3, an engaging plate 4, a locating plate 5, a bottom plate 6, and a press handle 7 as the main parts; the numeral lock, in combination, is fastened to a door; and, when the numeral lock is unlock, the press handle 7 can be depressed to move an activating rod 76 thereof and thereby to pull an associated dead bolt (not shown in the figures) of the numeral lock for the door to be opened.

The housing 1 has plurality of round holes 11 ; the round holes 11 are suitably arranged on one side thereof; and, in this preferred embodiment, there are two rows of round holes 11. Each round hole 11 holds a respective press button 12 and is represented with a respective numeral. Each press button 12 is associated with a depressing member 13 and a spring 131; the depressing members 13 each has two guide chips 132 at two opposing edges thereof. Furthermore, a round hole 14 is provided on the housing 1 for permitting a recovering button 141 to be received therein; the recovering button 141 is used for permitting the press buttons 12 to move to their original positions after depressed. A hat member 142 and spring 143 are received within the recovering button 141. A recovering rod 15 is passed through the spring 143 and is held within the recovering button 141; the recovering rod 15 has a contact slope 151 projecting from the intermediate portion thereof, and is passed through a spring 152 from the portion above the contact slope 151 as shown in Figs. 1, 16 and 17.

A round hole 16 is provided on the housing 1 for permitting the press handle 7 to be operationally associated therewith. The housing 1 further has a confining block 17, and plurality of screw holes 18, 18'.

Each locking pin 2, referring to Figs. 1 and 2, has a connecting bar portion 21 at lower portion thereof; the connecting bar portion 21 has square cross-section. Each locking pin 2 further has an upper engaging protrusion 22 and a lower engaging protrusion 23; the engaging protrusions 22 and 23 are shaped like truncated sectors and arranged in opposite direction. A locating rim 24 is provided on each locking pin 2 above the upper engaging protrusion 23; each locating rim 24 has a slope 241 there around. An engaging trench 242 is formed on each locking pin 2 between the upper engaging protrusion 23 and the locating rim 24 as shown in Fig. 6. Moreover, each locking pin 2 has a turning slot 25 and a directing slot 26 on the top of the cylindrical upper portion; the turning slot 25 is provided for a user to change the direction thereof with a screwdriver ; the directing slot 26 is provided to indicate the direction of the upper engaging protrusion 22 of the locking pin 2. Each locking pin 2 is passed into a spring 152 are prevented from move further downward by means of the locating rims 24.

The confining plate 3 has screw holes 31 and plurality of locating recesses 32 at positions corresponding with the round holes 11 of the housing 1 ; each locating recess 32 is shaped for permitting a respective one of the lower engaging protrusions 23 to be received therein, and has a central hole 321 and two guide holes 322. The central hole 321 is provided for a respective on of the connecting bar portions 21 of the locking pins 2 to be passed therethrough, and the guide holes 322 are provided for the guide chips 132 of the respective depressing member 13 to be passed therethrough.

Furthermore, a confining protrusion 323 is provided at one edge of each locating recess 32; the confining protrusion 323 will engage one of two sides of the respective lower engaging protrusion 23 such that the lower engaging protrusion 23 can only turn for one hundred and eighty degrees due to the confining protrusion 323. Referring to Fig.

4, the confining plate 3 has holding cavities 33 at opposite sides of the locating recesses 32; each holding cavity 33 has two protruding portions 331 and houses a locating chip 34 therein ; each locating chip 34 has two recess portions 341, which engage the respective protruding portions 331 of the holding cavity 33. The locating chips 34 each has a square hole 342 for permitting a respective connecting bar portion 21 of the locking pins 2 to pass therethrough; thus, the locating chips 34 can rotate along with the locking pins 2.

The confining plate 3 further has a through hole 35 corresponding with the round hole 14 of the housing 1 for the recovering rod 15 to pass therethrough.

The engaging plate 4 is disposed next to the confining plate 3, and has locking holes 41 corresponding to the locating recesses 32 of the confining plate 3; each locking hole 41 has a gap 42 at one end.

Each gap 42 forms a curved passing portion 421, which is a curved edge of the gap, and an engaging portion 422, which is shaped like a step and opposes the curved passing portion 421. Each locking hole 41 further has two opposing side holes 44 and a confining projection 43 as shown in Fig. 1; the side holes 44 are provided for permitting the guide chips 132 of the depressing members 13 to pass therethrough; the confining projection 43 can, when the respective locking pin 2 is passed through the locking hole 4, in combination, engage either one of two sides of the upper engaging protrusion 22 in order to confine the movement of locking pin 2. Furthermore, the engaging plate 4 has a through hole 45 corresponding to the through hole 35 of the confining plate 3 for the recovering rod 15 to pass therethrough. The engaging plate 4 is bent at lower end besides the through hole 45 in order to form two locating portions 451. Springs 452 are retained between the locating portions 451 and inner wall of the housing 1 ; thus, the engaging plate 4 is normally biased downwardly by the springs 452.

The locating plate 5 is disposed next to the engaging plate 4, and has locating holes 51 corresponding to the locking holes 41 of the engaging plate 4 for the locking pins 2 to pass therethrough.

Each locating hole 51 has an elastic string 511 fitted thereto; each elastic string 511 has one end movable inside the respective locating hole 51. When the locking pins 2 are depressed, the elastic strings 511 will engage the engaging trenches 242 of the locking pins 2 to prevent the locking pins 2 from unwarily moving upward after depressed. The locating plate 5 further has a through hole 52 corresponding to the through hole 45 of the engaging plate 4; the through hole 52 has, referring to Fig. 16, a slope portion 521 corresponding to the contact slope 151 of the recovering rod 15 such that the locating plate 5 can move upward when the recovering rod 15 is depressed, by means of the pushing action of the contact slope 151 upon the slope portion 521. A projection 53 is provided at upper end of the locating plate 5; a spring 54 is located by means of the projection 53, and is retained between the locating plate 5 and inner wall of the housing 1 in order to bias the locating plate 5 downwardly.

The bottom plate 6 has screw holes 61, a through hole 63 and through holes 62; the through holes 62 correspond to the locking holes 41 of the engaging plate 4; the through hole 63 is provided for the cylindrical end of recovering rod 15 to pass therethrough. Each through hole 62 is marked with a numeral 64 same as the corresponding round hole 11 of the housing 1. The bottom plate 6 further has a round hole 65.

The press handle 7 has a handle member 71, a square cavity 711 and a bolt hole 712; the bolt hole 712 communicates with the square cavity 711. A square bolt 72 is inserted into the square cavity 711 at one end and fixed thereto by means of a bolt 713 connected to the bolt hole 712. The square bolt 72 is connected to an elastic member 74 and a turning member 73 at the other end; the elastic member 74 and the turning member 73 are connected such that both does move relative to each other; the turning member 73 has a pushing portion 733 at one side, a square hole 731 and two curved portions 732 adjacent to the pushing portion 733; the elastic member 74 has two engaging projections 741, which will engage the confining block 17 of the housing when the square bolt 72 is fitted to the housing 1 and the press handle 7. The elastic member 74 forces the handle 7 to move to the original position after being pushed. A covering block 75 is provided; the covering block 75 has a central hole 751 and a rim 752 at one side, and a holding cavity 753 at the other side; referring to Fig. 4, the holding cavity 753 is shaped to have two curved sides opposing each other and two opposing blocking portions 754. The activating rod 76 has a connecting portion 761 is associated with the covering block 75 by inserting an engaging rod 763 into the through hole 762 and retaining the engaging rod 763 within the holding cavity 753 of the covering block 75. Another press handle 71'arranged on the inner side of the door can connected to the activating rod 76.

In combination, referring to Figs. 1 and 6, the square bolt 72 is passed through the round hole 16 of the housing 1 and then connected to the press handle 7 by means of the bolt 713. The upper portion of the square bolt 72 is passed through the elastic member 74 and the turning member 73; then, the covering block 75 coupled to the activating rod 76, is received in the square hole 731 of the turning member 73. Because the lock can fitted to right side or left side of a door, depending on the position of the door. In this preferred embodiment, the lock is fitted to the right side of the door. If the lock is to be fitted to left side of a door, we only have to separate the handle 7 from the square bolt 72 and turn the handle 7 for one hundred and eighty degrees and combine both again; and, we also have to turn the covering block 75 for ninety degrees after separating the same from the activating rod 76 and combine both again as shown in Fig. 7.

Secondly, the press buttons 12, the depressing members 13, and the springs, combined in the way as earlier mentloned, are put into the round holes 11 of the housing 1. The recovering button 141, the hat member 142, and the spring 143 are also held in the round hole 14.

Then the confining plate 3 associated with the locating chips 34 is disposed in the housing 1 with the guide chips 132 passing through the guide holes 322 of the confining plate 3 as shown in Figs. 8; thus, the springs 13 contact the locating chips 34. Thirdly, the engaging plate 4 is disposed on the confining plate 3 with the locking holes 41 communicating with the respective locating recesses 32 of the confining plate 3. Next, the springs 452 are disposed between the locating portions 451 of the engaging plate 4 and the inner wall of the housing 1, as shown in Fig. 9. Then, referring to Fig. 8, the locking pins 2 are passed through the locking holes 41 and passed into the spring s 131 at the same time, the locking pins 2 are arranged such that the directing slots 26 thereof direct outwardly as shown in Fig. 10, i. e. the upper engaging protrusions 22 face outward, and the lower engaging protrusion 23 are suitably fitted into the locating recesses 32 of the confining plate 3. The recovering rod 15 is passed through the through hole 45 with the contact slope 151 facing upper end of the housing 1.

Then, the locating plate 5 is disposed on the engaging plate 4 with the locating holes each 51 associated with the respective locking pin 2, and the slope portion 521 thereof contacting the contact slope 151 of the recovering rod 15. Springs 27 and 152 are connected to the locking pins 2 and the recovering rod 15 respectively. The lower ends of both the engaging plate 4 and the locating plate 5 contact the pushing portion 733 of the turning member 73 such that the turning member 73 cannot move when the engaging plate 4 is stopped from moving by the engaging protrusions 22 and 23 of the locking pins 2. Finally, the bottom plate 6 is fixed to the housing 1 by means of the screws 181'. The position of the directing slots 26 can be observed from the through holes 62 of the bottom plate 6.

In setting a predetermined pin number, referring to Figs. 6 and 8, we can use a screwdriver to turn those of the locking pins 2 which have their corresponding numerals included in the predetermined pin number to be set; such locking pins 2 are turned for one hundred and eighty degrees, i. e. the directing slots 26 thereof will move to inward direction. In turning the locking pins 2, the recess portions 341 of the locating chips 34 will first disengage from the protruding portions 331 of the holding cavities 3, and then will engage the same again when the desired turning amount is achieved. At the end of such turning, the upper engaging protrusions 22 of such turned locking pins 2 engage the engaging portions 422 of the locking holes 41 of the engaging plate 4, stopping the engaging plate 4 from moving. All the lower engaging protrusions 23 are received within the locating recesses 32 of the confining plate 3. Referring to Fig. 9, those locking pins 2 which are not turned will have their upper engaging protrusions 22 disposed next to the curved passing portions 421; such locking pins 2 will not stop the engaging plate from moving. Then the lock is fixed to the door and is further connected to another press handle 71'from inside of the door as shown in Figs. 10 and 11.

Thus, when one wants to unlock the lock, he/she has to depress the correct press buttons 12 according to the set pin numbers in order to push those turned locking pins 2 downward ; thus, the depressed locking pins 2 will have their upper engaging protrusions 22 separated from the respective locking holes 41, and lower engaging protrusions 22 received within the locking holes 41 instead. Thus, the engaging plate 4 is no longer stopped from moving by the locking pins 2 because all the engaging protrusions 22 and 23 received in the locking holes 41 do not engage the engaging portions 422. Then, the user can press the press handle 7 to open the door, referring to Fig.

14, the turning member 73 being now able to push the engaging plate 4 upward, and turn to bring the activating rod 76 into action. When the locking pins 2 are depressed, the elastic strings 511 will engage the engaging trenches 242 of the locking pins 2, and thus will prevent the depressed locking pins 2 from unwarily moving upward.

When the correct ones of the locking pins 2 are depressed and the press handle 7 is pressed to open the door, the elastic strings 511 will separate from the engaging trenches 242, allowing the depressed locking pins to move upward to the original positions by means of the springs 27. Then, when the press handle 7 is released, the handle 7 will move to the original position by means of the elastic member 74, and both the engaging plate 4 and the locating plate 5 will also be moved to the original positions by means of the springs 452 and 54 respectively.

Referring again to Fig. 4 and Fig. 15, when the press handle 71 is depressed to open the door, the covering block 75 operationally associated therewith will also turn in a direction as shown in Fig. 4, causing the activating rod 76 to turn, due to the engagement between the engaging rod 763 of the activating rod 76 and the blocking portion 754 of the covering block 75; thus, consequently the indoor handle 71'connected to the activating rod 76 will turn in the same direction. On the other hand, when the indoor handle 71'is depressed to open the door from inside of the house, the engaging rod 763 of the activating rod 76 is able to turn, in a direction as shown in Fig. 15, being not stopped by the blocking portion 754 of the covering block 75; thus, when the indoor handle 71'is depressed, the press handle 7 will not move.

As for the recovering button 141, referring to Figs. 16 and 17, when the user depresses wrong press buttons 12 and wants to bring these wrongly depressed buttons 12 to their original position, he/she can depress the recovering button 141, causing the contact slope 151 of the recovering rod 15 associated therewith to push the locating plate 5 upward from the slope portion 521 of the locating plate 5; thus, the engaging trenches 242 of the wrongly depressed locking pins 2 will disengage from the elastic strings 511 of the locating plate 5, and the wrongly depressed locking pins 2 are able to move to their original position.

To reset the numeral lock of the present invention, the user only has to remove the lock from the door and turn the locking pins with a screwdriver through the through holes 62 of the bottom plate 6 according to his/her predetermined pin number.

From the above description, it can be understood the numeral lock with the resettable features in the present invention has following advantages.

1. It is very easy to reset the numeral lock; only a screwdriver will do.

2. The numeral lock of the present invention has overcome the disadvantage of the prior art as described in the Background; the prior art numeral lock nearly has to be dismantled.

3. Because the numeral lock of the present invention does not have to be dismantled in resetting, the possibility of losing the parts, e. g. the springs, is eliminated.

4. Very little friction and obstacle occurs when the locking pins are turned, so the locking pins have longer life expectancy than the locking chips of the prior art numeral lock.

5. All the locking pins have same shape, while the locking chips of the prior art numeral lock have two kind of shapes; so, the production is more economical and labor cost lower.

6. When the indoor handle is depressed to open the door, the outside press handle does not move, and so people standing outside will not be aware of the door being open, increasing safety of the user.

7. Being round instead of being rectangular, the press buttons of the present invention are easier to be fitted to the lock than those the prior art lock.

Claims (6)

1. WHAT IS CLAIMED IS: 1. A numeral lock with resettable feature, comprising: (a) a housing having a plurality of round holes thereon, each round hole holding a press button therein; (b) a confining plate having locating recesses corresponding to said round holes, each locating recess having a central hole, said confining plate being fixedly disposed on said press buttons with springs being disposed between other side of each locating recess and a respective one of said press button; (c) an engaging plate having locking holes corresponding to said round holes, each locking hole having a curved passing portion and an engaging portion; said engaging plate being movably disposed on said confining plate and biased by a spring located between an upper end thereof and said housing; (d) a locating plate having locating holes corresponding to said round holes of said housing, each locating hole having an elastic string with one end capable of moving therein; said locating plate being movably disposed on said engaging plate within said housing, and being biased by a spring located between an upper end thereof and said housing; (e) a plurality of locking pins, each locking pin having a connecting bar portion at one end, a turning slot at other end, a first engaging protrusion, a second engaging protrusion, a locating rim, and an engaging trench between said first engaging protrusion and said locating rim; said locking pins being each inserted into a respective one of said press button through said locating hole of said locating plate; said first and second engaging protrusions having sector shape and being arranged in opposite direction; (f) a recovering rod having a contact slope, said contact slope contacting a slope portion of a through hole of said engaging plate for permitting said engaging plate to be moved when said recovering rod is depressed; (g) a bottom plate having through holes corresponding to said round holes of said housing, said bottom plate being fitted on said locating plate; springs being disposed between each of said through hole of said bottom plate and a respective one of said locating rims of said locking pins to bias said locking pins toward said press buttons; said locking pins being capable of being turned from said turning slots to change position of said first and second engaging protrusions thereof; said second protrusions being received within said locating recesses of said confining plate; said first engaging protrusions being received within said locking holes of said engaging plate; said first protrusions being capable of engaging said engaging portions of said locking holes when directing inwardly of said housing in order to stop said engaging plate from moving; those locking pins having said inward directing first protrusions needing to be depressed to bring said inward first protrusions to separate from said locking holes, and bring related second protrusions, which direct outwardly, into said locking holes; said related second protrusions being capable of passing through said curved passing portions of said locking holes to allow said engaging plate to move; said elastic strings being able to engage said engaging trenches of said locking pins to prevent said locking pins from unwarily moving once depressed, and being able to separate from said engaging trenches to allow said depressed locking pins to move by means of said springs disposed on said locating rims when said locating plate is move upward.
2. 2. A numeral lock of claim 1 further comprising a plurality of depressing members each having two guide chips, said depressing member being each disposed between a respective one of said press buttons and said springs associated with said press buttons; said guide chips of each of said depressing members being passed through guides holes of said locating recesses of said confining plate.
3. 3. A numeral lock according to claim 1, further comprising a confining block at inner lower end of said housing, a press handle rotatably fitted to said housing, and a turning member housed inside said housing adjacent to said confining block, said turning member having a hole and a pushing portion, said hole being operationally associated with said press handle for said turning member to be capable of turning along with said handle, said pushing portion contacting lower ends of said locating plate and said engaging plate for stopping said turning member from turning when said engaging plate engages said locking pins.
4. 4. A numeral lock according to claim 1 further having an elastic member disposed between said press handle and said turning member; said elastic member being connected to said turning member, and having two engaging projections engaging said confining block of said housing for permitting said turning member to move to an original position after turning along with said press handle.
5. 5. A numeral lock according to claim 1 further having a covering block capable of turning along with said turning member; an activating rod being inserted into a hole of said covering block from one end thereof; said covering block having a holding cavity consisting of two curved sides opposing each other and two opposing blocking portions; said activating rod having an engaging rod passed through said end of said activating rod, and received within said holding cavity.
6. 6. A numeral lock according to claim 1 further having numerals marked on said housing and said bottom plate, each numeral being related to a respective one of said round holes of said housing and said through holes of said bottom plate.

   6. A numeral lock according to claim 1 further having numerals marked on said housing and said bottom plate, each numeral being related to a respective one of said round holes of said housing and said through holes of said bottom plate.

   Amendments to the claims have been filed as follows 1. A numeral lock with resettable feature, comprising : (a) a housing having a plurality of round holes thereon, each round hole holding a press button therein; (b) a confining plate having locating recesses corresponding to said round holes, each locating recess having a central hole, said confining plate being fixedly disposed on said press buttons with springs being disposed between other side of each locating recess and a respective one of said press buttons; (c) an engaging plate having locking holes corresponding to said round holes, each locking hole having a curved portion and an engaging portion; said engaging plate being movably disposed on said confining plate and biased by a spr located between an upper end thereof and said housing ; (d) a locating plate having locating holes corresponding to said round holes of said housing, each locating hole having an elastic string with one end capable of moving therein; said locating plate being disposed on said engaging plate within said housing, for movement relative to the engaging plate and being biased by a spring located between an end thereof and said housing ; (e) a plurality of locking pins, each locking pin having a coilnect. ng bar portion at one end, a turning slot at other end, a first lateral proirusion, a second lateral protrusion, a local ing rim, and an engaging trench between said @@s@ lateral protrasion and said locating rim; said locking pins being each inserted into a respective one of said press buttons through said locating hole of said locating plate; said first and second protrusions having a sector shape and extending laterally in opposite directions; (f) a recovering rod having a contact slope, said contsrt slope contacting a slope portion of a through hole of said locating plate for permitting said locating plate to be moved when said recovering rod is depressed ; (g) a bottom plate having through holes corresponding to said round holes of said housing, said bottom plate being mounted next to said locating plate; springs being disposed between each of said through holes of said bottom plate and a respective one of said locating rims of said locking pins to bias said locking pins toward said press buttons; said locking pins being capable of being turned by means of said turning slots to change position of said first and second engaging protrusions thereof; said second protrusions being received within said locating recesses of said confining plate; said first protrusions being received within said locking holes of said engaging plate; said first protrusions being capable of engaging said engaging portions of said locking holes in order to stop said engaging plate from moving; those locking pins having first protrusions engaged with the locking holes needing to be depressed to release said inward first protrusions from said locking holes, and bring related second protrusions into said locking holes; said related second protrusions being capable of passing through said curved portions of said locking holes to allow said engaging plate to move; said elastic strings being able to engage said engaging trenches of said locking pins to prevent said locking pins from unwarily moving once depressed, and being able to separate from said engaging trenches to allow said depressed locking pins to move by means of said springs disposed on said locating rims when said locating plate is move upward.

   2. A numeral lock of claim 1 further comprising a plurality of depressing members each having two guide arms said depressing member being each disposed between a respective one of said press buttons and said springs associated with said press buttons ; said guide arms of each of said depressing members being passed through guides holes of said locating recesses of said confining plate.

   3. A numeral lock according to claim 1, further comprising a stop block at an end of said housing for a rotatable handle, rotatably fitted to said housing, and a turning member housed inside said housing adjacent to said block, said turning member having a hole and a pushing portion for moving the engagement plate when rotated, said hole being operationally associated with said handle for said turning member to be capable of turning along with said handle, said pushing portion contacting lower ends of said locating plate and said engaging plate for stopping said turning member from turning when said engaging plate engages said locking pins.

   4. A numeral lock according to claim 3 further having an clastic member disposed between said handle and said lurning member ; said elastic member being connected to said turning member, and having two engaging projections engaging said confining block of said housing for biasing said turning member to move to an original position after being rotated, along with said handle, from that position.

   5. A numeral lock according to claim 3 or 4 having a covering block mounted on an end capable of turning along with said turning member; and actuable rod being inserted into a hole in said block from one end thereof; said block having a holding cavity consisting of two curved sides opposing each other and two opposing blocking portions said actuable rod having an engaging rod passed through said end of said activating rod, and received within said holding cavity, the actuable rod being turnable to rotate the turning member.